Consulta: subjectFacets:"Phosphorus"
Registros recuperados: 225
Data/hora: 13/06/2024 05:25:50

Fertilización fosfatada en chile guajillo (Capsicum annuum L.) y su interacción con hongos micorrízicos arbusculares.
Provedor de dados: 32
Autores: Lucas Santoyo, Luis Gustavo.
Se evaluó el efecto de la inoculación de una mezcla de hongos micorrízicos arbusculares (HMA) compuesta por Rhizophagus intraradices, Glomus albidum, Claroideoglomus claroideum, Rhizophagus diaphanus, Acaulospora laevis, Glomus sp.1, Funneliformis geosporum, Glomus sinuosum, Acaulospora denticulata, Glomus sp.2, Glomus sp.3 y Glomus sp.4 en chile guajillo (Capsicum annuum L.) fertilizado con diferentes dosis de fósforo (0, 25, 50 y 75 kg ha-1). El nitrógeno y potasio se mantuvieron constantes (230 y 150 kg ha-1 respectivamente) en todos los tratamientos. Se usó semilla proveniente de la comunidad Nigromante, Zacatecas, y suelo con bajo contenido de fósforo (5 mg kg-1 de P-Olsen) colectado en Tequexquinahuac, Estado de México. Las evaluaciones para altura...
Palavras-chave: Chile guajillo; Hongos micorrízicos arbusculares; Fósforo; Desarrollo; Rendimiento; Arbuscular mycorrhizal fungi; Phosphorus; Development; Performance; Maestría; Edafología.
Ano: 2011
URL: http://hdl.handle.net/10521/515

Crecimiento y rendimiento de haba (Vicia faba L.) en ambientes contrastantes.
Provedor de dados: 32
Autores: Pichardo Riego, Juan Carlos.
En México el cultivo de haba es de gran importancia social y económica principalmente en la región de los “Valles altos”, que aportan cerca del 98% a la producción nacional. Sin embargo debido a los bajos rendimientos de esta leguminosa se requiere un manejo del cultivo más apropiado en función de la diversidad de ambientes en que se desarrolla, incluyendo la búsqueda de cultivares de máximo rendimiento de grano seco para cada localidad. El objetivo del estudio fue determinar el comportamiento de distintos cultivares de haba en diferentes ambientes e identificar el más productivo de acuerdo a la región de estudio y a éste, aplicarle la mejor combinación de fertilización nitrogenada, fosfatada y densidad de población (DP). El estudio se realizó bajo...
Palavras-chave: Cultivar; Nitrógeno; Fósforo; Densidad de población; Rendimiento; Estabilidad de rendimiento; Máxima eficiencia biológica; Máxima eficiencia económica; Tratamiento óptimo económico; Cultivar; Nitrogen; Phosphorus; Population density; Yield; Yield stability; Maximum biological efficiency; Maximum economical efficiency; Optimum economic treatment; Doctorado; Botánica.
Ano: 2010
URL: http://hdl.handle.net/10521/157

Crecimiento y rendimiento de haba (Vicia faba L.) en ambientes contrastantes.
Provedor de dados: 32
Autores: Pichardo Riego, Juan Carlos.
En México el cultivo de haba es de gran importancia social y económica principalmente en la región de los “Valles altos”, que aportan cerca del 98% a la producción nacional. Sin embargo debido a los bajos rendimientos de esta leguminosa se requiere un manejo del cultivo más apropiado en función de la diversidad de ambientes en que se desarrolla, incluyendo la búsqueda de cultivares de máximo rendimiento de grano seco para cada localidad. El objetivo del estudio fue determinar el comportamiento de distintos cultivares de haba en diferentes ambientes e identificar el más productivo de acuerdo a la región de estudio y a éste, aplicarle la mejor combinación de fertilización nitrogenada, fosfatada y densidad de población (DP). El estudio se realizó bajo...
Palavras-chave: Cultivar; Nitrógeno; Fósforo; Densidad de población; Rendimiento; Estabilidad de rendimiento; Máxima eficiencia biológica; Máxima eficiencia económica; Tratamiento óptimo económico; Cultivar; Nitrogen; Phosphorus; Population density; Yield; Yield stability; Maximum biological efficiency; Maximum economical efficiency; Optimum economic treatment; Doctorado; Botánica.
Ano: 2010
URL: http://hdl.handle.net/10521/157

Fertilización fosfatada en chile guajillo (Capsicum annuum L.) y su interacción con hongos micorrízicos arbusculares.
Provedor de dados: 32
Autores: Lucas Santoyo, Luis Gustavo.
Se evaluó el efecto de la inoculación de una mezcla de hongos micorrízicos arbusculares (HMA) compuesta por Rhizophagus intraradices, Glomus albidum, Claroideoglomus claroideum, Rhizophagus diaphanus, Acaulospora laevis, Glomus sp.1, Funneliformis geosporum, Glomus sinuosum, Acaulospora denticulata, Glomus sp.2, Glomus sp.3 y Glomus sp.4 en chile guajillo (Capsicum annuum L.) fertilizado con diferentes dosis de fósforo (0, 25, 50 y 75 kg ha-1). El nitrógeno y potasio se mantuvieron constantes (230 y 150 kg ha-1 respectivamente) en todos los tratamientos. Se usó semilla proveniente de la comunidad Nigromante, Zacatecas, y suelo con bajo contenido de fósforo (5 mg kg-1 de P-Olsen) colectado en Tequexquinahuac, Estado de México. Las evaluaciones para altura...
Palavras-chave: Chile guajillo; Hongos micorrízicos arbusculares; Fósforo; Desarrollo; Rendimiento; Arbuscular mycorrhizal fungi; Phosphorus; Development; Performance; Maestría; Edafología.
Ano: 2011
URL: http://hdl.handle.net/10521/515

Modificación de variables de la degradacióny fermentación in vitro E in situ de una dieta con una fitasa exógena para borregos en crecimiento.
Provedor de dados: 32
Autores: Vallejo Hernández, Laura Haydée.
Tres dosis de enzima fitasa Ronozyme-HiPhosÒ (DSM Nutritional Products 5000 FTU g-1) (0, 540 y 720 g fitasa t-1) se evaluaron en un dieta concentrada (70% sorgo y 16.9% gluten de maíz), para determinar si la inclusión de la enzima modifica las variables de degradación y fermentación de la dieta. Muestras de dietas fueron incubadas durante 3, 6, 9, 12, 24 y 48 h, para identificar cambios en degradación in vitro de materia seca (DIVMS), pH, nitrógeno amoniacal (N-NH3), fósforo (P) en medio de incubación, producción de gas y ácidos grasos volátiles (AGV); el diseño experimental fue de bloques al azar generalizados. Además se realizó una prueba in situ, en la cual se utilizaron 6 borregos criollos (40 ± 2 kg PV) con cánula en rumen y duodeno, para determinar...
Palavras-chave: Fitasa; Fitato; Fósforo; Borregos; Phytase; Phytate; Phosphorus; Lambs; Ganadería; Maestría.
Ano: 2014
URL: http://hdl.handle.net/10521/2224

Zebra Mussel Farming in the Szczecin (Oder) Lagoon: Water-Quality Objectives and Cost-Effectiveness
Provedor de dados: 7
Autores: Schernewski, Gerald; Leibniz-Institute for Baltic Sea Research; schernewski@eucc-d.de; Stybel, Nardine; EUCC - The Coastal Union Germany; stybel@eucc-d.de; Neumann, Thomas; Leibniz-Institute for Baltic Sea Research; thomas.neumann@io-warnemuende.de.
The Oder (Szczecin) Lagoon in the southern Baltic Sea is a heavily eutrophicated and degraded coastal ecosystem. We applied a systems approach framework to critically evaluate whether existing water-management measures achieve water-quality objectives for the river and lagoon systems. Our simulations reveal that the existing water-quality objectives for the river and the coastal waters are not sufficiently complementary. We suggest new water-quality threshold concentrations, which are in agreement with the European Water Framework Directive, and we calculate acceptable maximum nutrient loads for the Oder River. These calculations suggest that external nutrient-load reductions in the river basin alone seem insufficient to achieve good water quality in the...
Tipo: Peer-Reviewed Reports
Palavras-chave: Baltic Sea Action Plan; Coastal ecosystem; Cost-benefit analysis; ERGOM; Eutrophication; Marginal costs; Mussel farming; Nitrogen; Oder Lagoon; Oder River; Phosphorus; Szczecin Lagoon; Water Framework Directive; Water management; Water quality; Zebra mussels (Dreissena polymorpha).
Ano: 2012

Transient Social&amp;#8211;Ecological Stability: the Effects of Invasive Species and Ecosystem Restoration on Nutrient Management Compromise in Lake Erie
Provedor de dados: 7
Autores: Roy, Eric D.; Department of Food, Agricultural and Biological Engineering, Ohio State University; eroy5@tigers.lsu.edu; Martin, Jay F.; Department of Food, Agricultural and Biological Engineering, Ohio State University; martin.1130@osu.edu; Irwin, Elena G.; Department of Agricultural, Environmental and Development Economics, Ohio State University; irwin.78@osu.edu; Conroy, Joseph D.; Department of Evolution, Ecology and Organismal Biology, Ohio State University; conroy.27@osu.edu; Culver, David A.; Department of Evolution, Ecology and Organismal Biology, Ohio State University; culver.3@osu.edu.
Together, lake ecosystems and local human activity form complex social&amp;#8211;ecological systems (SESs) characterized by feedback loops and discontinuous change. Researchers in diverse fields have suggested that complex systems do not have single stable equilibria in the long term because of inevitable perturbation. During this study, we sought to address the general question of whether or not stable social&amp;#8211;ecological equilibria exist in highly stressed and managed lacustrine systems. Using an integrated human&amp;#8211;biophysical model, we investigated the impacts of a species invasion and ecosystem restoration on SES equilibrium, defined here as a compromise in phosphorus management among opposing stakeholders, in western Lake Erie. Our...
Tipo: Peer-Reviewed Reports
Palavras-chave: Dreissena; Ecosystem services; Invasive species; Lake Erie; Lake eutrophication; Lake management; Perturbation; Phosphorus.
Ano: 2010

Managing the Resilience of Lakes: A Multi-agent Modeling Approach
Provedor de dados: 7
Autores: Janssen, Marco A; Indiana University; maajanss@indiana.edu; Carpenter, Stephen R; University of Wisconsin-Madison; srcarpen@wisc.edu.
We demonstrate an approach for integrating social and ecological models to study ecosystem management strategies. We focus on the management of lake eutrophication. A model has been developed in which the dynamics of the lake, the learning dynamics of society, and the interactions between ecology and society are included. Analyses with the model show that active learning is important to retain the resilience of lakes. Although very low levels of phosphorus in the water will not be reached, active learning reduce the chance of catastrophic high phosphorus levels.
Tipo: Peer-Reviewed Reports
Palavras-chave: Active learning; Eutrophication; Integrated modeling; Lake dynamics; Lake management; Multi-agent modeling; Phosphorus; Resilience; Restoration; Simulation.
Ano: 1999

Plausible futures of a social-ecological system: Yahara watershed, Wisconsin, USA
Provedor de dados: 7
Autores: Carpenter, Stephen R; Center for Limnology, University of Wisconsin-Madison; srcarpen@wisc.edu; Booth, Eric G.; Department of Agronomy, University of Wisconsin-Madison; Department of Civil and Environmental Engineering, University of Wisconsin-Madison; egbooth@wisc.edu; Gillon, Sean; Department of Food Systems and Society, Marylhurst University; Department of Forest and Wildlife Ecology, University of Wisconsin-Madison; sgillon@marylhurst.edu; Kucharik, Christopher J.; Department of Agronomy, University of Wisconsin-Madison; Nelson Institute Center for Sustainability and the Global Environment, University of Wisconsin-Madison; kucharik@wisc.edu; Loheide, Steven; Department of Civil and Environmental Engineering, University of Wisconsin-Madison; Loheide@wisc.edu; Mase, Amber S.; Department of Forest and Wildlife Ecology, University of Wisconsin-Madison; Mase@wisc.edu; Motew, Melissa; Nelson Center for Sustainability and the Global Environment, University of Wisconsin-Madison; Motew@wisc.edu; Qiu, Jiangxiao; Department of Zoology, University of Wisconsin-Madison; jqiu7@wisc.edu; Rissman, Adena R; Department of Forest and Wildlife Ecology, University of Wisconsin-Madison; ARRissman@wisc.edu; Seifert, Jenny; Center for Limnology, University of Wisconsin-Madison; JSeifert2@wisc.edu; Soylu, Evren; Department of Civil Engineering, Meliksah University; Nelson Institute for Sustainability and the Global Environment, University of Wisconsin-Madison; evrensoylu@gmail.com; Turner, Monica; Department of Zoology, University of Wisconsin-Madison; turnermg @ wisc.edu; Wardropper, Chloe B; Nelson Institute for Environmental Studies, University of Wisconsin-Madison; Wardropper@wisc.edu.
Agricultural watersheds are affected by changes in climate, land use, agricultural practices, and human demand for energy, food, and water resources. In this context, we analyzed the agricultural, urbanizing Yahara watershed (size: 1345 km&amp;#178;, population: 372,000) to assess its responses to multiple changing drivers. We measured recent trends in land use/cover and water quality of the watershed, spatial patterns of 10 ecosystem services, and spatial patterns and nestedness of governance. We developed scenarios for the future of the Yahara watershed by integrating trends and events from the global scenarios literature, perspectives of stakeholders, and models of biophysical drivers and ecosystem services. Four qualitative scenarios were created to...
Tipo: Peer-Reviewed Reports
Palavras-chave: Alternative futures; Climate; Ecosystem services; Eutrophication; Governance; Lakes; Land-use change; Phosphorus; Scenarios.
Ano: 2015

Evolution of Forest Systems: the Role of Biogeochemical Cycles in Determining Sustainable Forestry Practices
Provedor de dados: 7
Autores: Flueck, Werner T.; National Council for Scientific and Technical Research (CONICET), Argentina; Institute of Natural Resources Analysis, Universidad Atlantida Argentina; Swiss Tropical Institute, University of Basel; wtf@deerlab.org.
The exploitation of natural resources such as forests leads to sustainable forest management (SFM). The key question is how to define and parametrize &amp;#8220;sustainable use.&amp;#8221;  Promoting forest use that conserves spatial characteristics of forest landscapes and the structure and composition of forest stands was proposed as a way of maintaining elements of biodiversity such as species richness and genetic variation. However, to establish the parameter space for sustainable forest use, it is essential to consider the nutrient requirements of forest systems, that is, plants and animals, the need for fertilizer application, and the effects on biogeochemical cycles, a cornerstone of biological evolution and, thus, biodiversity. The use of forest...
Tipo: Peer-Reviewed Response
Palavras-chave: Biogeochemical cycle; Fertilizer; Macronutrients; Micronutrients; Phosphorus; Selenium; Sustainable forest management.
Ano: 2009

NUTRIENT REMOVAL FROM SWINE WASTEWATER IN A COMBINED VERTICAL AND HORIZONTAL FLOW CONSTRUCTED WETLAND SYSTEM
Provedor de dados: 70
Autores: Bôas,Regina B. Vilas; Fia,Ronaldo; Fia,Fátima R. L.; Campos,Alessandro T.; Souza,Gabriela R. de.
ABSTRACT This study aimed to assess the performance of a combined vertical flow (VFCW) and horizontal subsurface-flow (HFCW) constructed wetland systems built on a pilot scale and submitted to different configurations and organic load application rates of pre-treated swine wastewater (SWW) in anaerobic systems on the nitrogen and phosphorus removal. The average values of redox potential in the systems were between anoxic and aerobic conditions, favoring an increased nitrate concentration in VFCW. Nitrogen removal by VFCW–HFCW system can be considered as satisfactory, reaching removal values of 75%. VFCW and HFCW proved to be limited in phosphorus removal, reaching values of 48%.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cynodon spp; Phosphorus; Nitrogen; Post-treatment; Typha sp.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162018000300411

Performance of UASB reactors in two stages followed by post-treatment with activated sludge in wastewater batch of wet-processed coffee
Provedor de dados: 70
Autores: Bruno,Marcelo; Oliveira,Roberto A. de.
In this study it was evaluated the efficiency of the treatment of wet-processed coffee wastewater in upflow anaerobic sludge blanket (UASB) reactors in two stages, in bench scale, followed by post-treatment with activated sludge in batch. The first UASB reactor was submitted to an hydraulic retention time (HRT) of 6.2 d and organic loading rates (OLR) of 2.3 and 4.5g CODtotal (L d)-1, and the second UASB reactor to HRT of 3.1 d with OLR of 0.4 and 1.4g CODtotal (L d)-1. The average values of the affluent CODtotal increased from 13,891 to 27,926mg L-1 and the average efficiencies of removal of the CODtotal decreased from 95 to 91%, respectively, in the UASB reactors in two stages. The volumetric methane production increased from 0.274 to 0.323L CH4 (L...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Anaerobic digestion; Methane; Nitrogen; Phosphorus; Phenols.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162013000400020

SEASONAL VARIATION IN LEAF LITTER NUTRIENT CONCENTRATIONS OF VALDIVIAN RAINFOREST TREES
Provedor de dados: 73
Autores: Lusk,Christopher H.; Matus,Francisco; Moreno-Chacón,María; Saldaña,Alfredo; Jiménez-Castillo,Mylthon.
Resorption of nutrients from senescing tissues is an important aspect of the nutrient economy of perennial plants, and a major influence on ecosystem nutrient dynamics. Attempts to interpret the adaptive significance of variation in nutrient resorption efficiency have met with little success, leading some scientists to emphasize the need for more work on the biochemical and physiological basis of resorption. One hypothesis suggests than variation in resorption is controlled by sink-source effects within the plant. According to this hypothesis, we might expect resorption to be positively correlated with plant growth rates. This could be expected not only for comparisons among species or populations, but also when comparing conspecific individuals growing at...
Tipo: Journal article
Palavras-chave: Nitrogen; Nutrient cycling; Phosphorus; Plant nutrition; Resorption.
Ano: 2003
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-66432003000100006

Phosphate fertilization influences macronutrient accumulation in watermelon cv Magnum
Provedor de dados: 75
Autores: Pereira,Natanael S; Alves Júnior,Antônio Roberto; Celedônio,Wilma F; Rodrigues,Esiana A; Chaves,Sérgio WP; Medeiros,José Francismar.
ABSTRACT Studies on nutrient uptake are important to understand nutritional needs of crops, which demand may also be influenced by fertilization management, particularly P fertilization. Thus, the aim of this study was to evaluate macronutrient accumulation and distribution in watermelon cv. Magnum, under two forms of phosphate fertilization. The experiment was carried out in a sandy-textured Argisol in Mossoró-RN. The experimental design was a randomized block design, arranged in split plot in time, with four replicates. We evaluated dose of 137 kg ha-1 of P2O5 under two forms of fertilization [pre-planting (F0) and pre-planting + topdressing (F1)]. Triple superphosphate (SFT) was used for pre-planting applications and topdressing applications were done...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Citrullus lanatus; Nutrient accumulation; Phosphorus.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362018000300346

Phosphate fertilization over the accumulation of macronutrients in cauliflower seed production
Provedor de dados: 75
Autores: Cardoso,Antonio II; Claudio,Marina TR; Nakada-Freitas,Pâmela G; Magro,Felipe O; Tavares,Ana EB.
abstract Considering the scarce information on nutrient extraction by plants for seed production within vegetable crops, as well as the effect of fertilization over extraction, studying nutrient accumulation in different plant parts under varied fertilization rates is necessary. This study aimed to evaluate the influence of phosphate rates on macronutrient accumulation in cauliflower plants during seed production. Five phosphate rates were studied (0, 300, 600, 900 and 1200 kg/ha P2O5), in a randomized complete block design, with four replications. Accumulation of nutrients in the different plant parts was evaluated at the end of the cycle (vegetative and reproductive, the latter divided in seeds and inflorescence). Data were submitted to analysis of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Brassica oleracea var. botritys; Phosphorus; Mineral nutrition.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362016000200196

ИЗМЕНЧИВОСТЬМОРФОМЕТРИЧЕСКИХ ПРИЗНАКОВ DUNALIELLA SALINA В УСЛОВИЯХ КУЛЬТУРЫ
Provedor de dados: 13
Autores: Антоненко, С. П.; Догадина, Т. В.; Комаристая, В. П.
Выявлена изменчивость размеров и формы, биохимических показателей Dunaliella salina в зависимости от обеспеченности культуры азотом и фосфором. Рассматривается возможность использования этих признаков для индикации содержания биогенов в природных водоёмах. http://biotex.ibss.org.ua/
Tipo: Journal Contribution
Palavras-chave: Морфометрические признаки; Dunaliella salina; Азот; Фосфор; Морфометричні ознаки; Morphometric signs; Nitrogen; Phosphorus.
Ano: 2010
URL: http://repository.ibss.org.ua/dspace/handle/99011/1864

Динамика потребления фосфора Spirulina platensis (Nordst.) Geitl. в накопительной культуре
Provedor de dados: 13
Autores: Горбунова, С. Ю.
Исследована динамика потребления фосфора Spiruhna platensis (Nordst) Geitl. при выращивании на среде Заррук в накопительной культуре. Приведено значение максимальной продуктивности. Рассчитано соотношение потребляемых биогенов N:P. Определена истинная потребность Spiruhna platensis в фосфоре.
Tipo: Journal Contribution
Palavras-chave: Phosphorus; Biogeny; Phosphorus; Http://aims.fao.org/aos/agrovoc/c_5804.
Ano: 2007
URL: http://repository.ibss.org.ua/dspace/handle/99011/604

Особенности вторичного каротиногенеза  Haematococcus pluvialis Flotow (Chlamydomonadales) при различных условиях минерального обеспечения.
Provedor de dados: 13
Autores: Терентьева, Н. В.; Минюк, Г. С.; Дробецкая, И. В.; Чубчикова, И. Н.
Исследовано влияние концентрации азота и фосфора в среде на скорость роста и накопление астаксантина в вегетативных клетках зелёной микроводоросли Haematococcus pluvialis при выращивании методом одностадийной полупроточной культуры. Показано, что необходимым условием сохранения монадной структуры, деления клеток на протяжении длительного периода и накопления в них астаксантина является поддержание минимального уровня биогенных элементов в среде в пределах 0.2-0.4 мМ N и 0.01-0.02 мМ Р.
Tipo: Journal Contribution
Palavras-chave: Haematococcus pluvialis; Культивирование; Астаксантин; Азот; Фосфор; Cultivation; Astaxanthin; Nitrogen; Phosphorus; Культивування.
Ano: 2008
URL: http://repository.ibss.org.ua/dspace/handle/99011/833

Экскреция фосфора зоопланктоном в Черном море
Provedor de dados: 13
Autores: Пархоменко, А. В.
Рассмотрены результаты модельных расчётов экскреции неорганического фосфора зоопланктоном в глубоководной области Чёрного моря. Величины скорости экскреции фосфатов зоопланктоном в слое 0 - 150 м зимой варьировали от 2.45 до 3.29, весной - 4.25 - 8.81, летом - 7.72 - 12.39, осенью - 13.36 - 3.77 мгР·мˉ2·сутˉ¹. Количественная оценка вклада простейших, мезопланктона и желетелого макропланктона в суммарную экскрецию фосфатов указывает на ключевую роль простейших. Вклад простейших в среднем составлял - 51 %, мезопланктона - 32 %, макропланктона - 17 %. Регенерационная первичная продукция зимой изменялась от 17 до 30 %, весной - 30 - 97 %, летом - 93 - 100 %, осенью - 44 - 100 %, в среднем за год 64 %. Обсуждается вопрос о роли "микробиальной петли" в...
Tipo: Journal Contribution
Palavras-chave: Фосфор; Экскреция; Скорость; Зоопланктон; Черное море; Phosphorus; Rate; Excretion; Zooplankton; Black sea Zooplankton Excretion Phosphorus Zooplankton Phosphorus Excretion http://aims.fao.org/aos/agrovoc/c_15490 http://aims.fao.org/aos/agrovoc/c_5804 http://aims.fao.org/aos/agrovoc/c_2750.
Ano: 2005
URL: http://repository.ibss.org.ua/dspace/handle/99011/242

Nutrient enrichment effect on macroinvertebrates in a lowland stream of Argentina
Provedor de dados: 76
Autores: Cortelezzi,Agustina; Ocón,Carolina; Oosterom,María V. López van; Cepeda,Rosana; Capítulo,Alberto Rodrigues.
ABSTRACT One of the most important effects derived from the intensive land use is the increase of nutrient concentration in the aquatic systems due to superficial drainage. Besides, the increment of precipitations in South America connected to the global climate change could intensify these anthropic impacts due to the changes in the runoff pattern and a greater discharge of water in the streams and rivers. The pampean streams are singular environments with high natural nutrient concentrations which could be increased even more if the predictions of global climate change for the area are met. In this context, the effect of experimental nutrient addition on macroinvertebrates in a lowland stream is studied. Samplings were carried out from March 2007 to...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Phosphorus; Nitrogen; Fertilization; Invertebrate abundance; Climate change.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212015000200228

Teores de minerais do capim canarana-erecta-lisa (Echinochloa pyramidalis) em três idades.
Provedor de dados: 14
Autores: CAMARAO, A. P.; MATOS, A. de O.; BATISTA, H. A. M.
bitstream/item/34012/1/CPATU-CirTec54.pdf
Tipo: Circular Técnica (INFOTECA-E)
Palavras-chave: Canarana-erecta-lisa; Forrageira; Teor; Belem; Pará; Brasil; Grass; Forrage.; Análise; Cálcio; Capim; Fósforo; Gramínea; Magnésio; Potássio.; Amazonia; Calcium; Magnesium; Phosphorus; Potassium.
Ano: 1988
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/383820

Book of abstracts.
Provedor de dados: 14
Autores: SUSTAINABLE PHOSPHORUS SUMMIT, 6., 2018, Brasília, DF.
bitstream/item/193581/1/CNPS-DOC-205-2019.epub
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Fósforo; Fertilizante; Agricultura; Phosphorus; Fertilizers; Agriculture.
Ano: 2019
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1106643

Agricultura e qualidade da agua: contaminacao da agua por nitrato.
Provedor de dados: 14
Autores: RESENDE, A. V. de.
bitstream/CPAC-2009/24718/1/doc_57.pdf
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Contamination; Health.; Contaminação; Fósforo; Impacto Ambiental; Nitrogênio; Poluição da Água; Saúde.; Recurso Hídrico; Qualidade da Água; Environmental impact; Eutrophication; Nitrates; Nitrogen; Phosphorus; Water resources.; Water quality; Water pollution.
Ano: 2002
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/546464

Manejo da adubação fosfatada para cana-de-açúcar no Cerrado.
Provedor de dados: 14
Autores: REIN, T. A.; SOUSA, D. M. G. de; SANTOS JUNIOR, J. de D. G. dos; NUNES, R. de S.; KORNDORFER, G. H.
bitstream/item/161535/1/CT-29.pdf
Tipo: Circular Técnica (INFOTECA-E)
Palavras-chave: Cana-de-açúcar; Agroenergia; Brasil; Buildup fertilization; Phosphate; Acid soil; Savanna.; Fosfatase; Fósforo; Adubação a Lanço; Cerrado; Saccharum Officinarum; Solo Ácido.; Brazil; Bioenergy; Phosphorus; Sugarcane.
Ano: 2015
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1026343

Contribuição da micorriza arbuscular na resposta das culturas à calagem e adubação fosfatada em solos de cerrado.
Provedor de dados: 14
Autores: MIRANDA, J. C. C. de MIRANDA, L. N. de.
ABSTRACT: The crop production in the cerrado soils may be improved when high amounts of lime and phosphate fertilizers are used. An economical management alternative of these inputs involves biological processes as the arbuscular mycorrhiza. The presence of arbuscular mycorrhizal fungi in the soil and the consequent root colonization cause an alteration in the plant response to the utilized inputs by increasing their effects on plant growth. Then, to make profit of the beneficial effects of arbuscular mycorrhiza, the increase and diversification of arbuscular micorrhizal fungi in the soil is recommended, mainly in those soils where its population is generally low, as in the cerrado soils.
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Phosphate fertilizers.; Cerrado; Fósforo; Fungo; Fertilizante Fosfatado; Micorriza; Solo.; Phosphorus; Mycorrhizae; Soil.
Ano: 2003
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/568684

Resposta da Brachiaria decumbens cv. Basilisk ao Fósforo e Níveis Críticos de P num Latossolo Roxo.
Provedor de dados: 14
Autores: SOARES, W. V.; MACEDO, M. C. M.; VILELA, L.; SOUZA, O. C. de.
Um experimento no campo foi conduzido num Latossolo Roxo Alico muito argiloso, fase cerradao, em Campo Grande - MS, durante 66 meses (1978- 1984), com os seguintes objetivos: Obter a curva de resposta da Brachiaria decumbens ao fosforo e estimar os niveis criticos de fosforo no solo para o estabecimento e a manutencao de pastagem com essa graminea. Os tratamentos constaram de sete doses de fosforo: 0,40, 80, 160, 320, 640 e 1280kg/ha de P205 como superfosfato triplo, em parcelas de 7x5 m, num delineamento de blocos ao acaso com quatro repeticoes. Dez dias antes da aplicacao dos tratamentos, 2,6t/ha de calcario dolomitico foram incorporadas a 20 cm profundidade. Incluiu-se nos tratamentos adubacao basica constituida de: 50, 20, 50, 5 e 1 kg/ha,...
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Cultivar Basilisk; Phosphate; Basilisk; Brazilian savannas; Feed grasses; Fertilization; Latosol; Pasture; Phosphorius; Planta gramínea; Red latosol; Savanna.; Adubação; Brachiaria Decumbens; Cerrado; Fósforo; Fosfato; Gramínea Forrageira; Latossolo Roxo; Pastagem; Solo.; Ferralsols; Fertilizer application; Forage; Fertilizers; Phosphorus; Varieties.; Soil.
Ano: 1999
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/546467

Adubação do tomateiro rasteiro no submédio São Francisco.
Provedor de dados: 14
Autores: FARIA, C. M. B. de; PEREIRA, J. R.; COSTA, N. D.; SOARES, J. M.; PINTO, J. M.
O objetivo desse trabalho foi fazer uma apresentação e avaliação dos aspectos técnicos relacionados à prática da adubação associada ao relato e à discussão de resultados de pesquisas obtidos com o tomateiro no Submédio São Francisco.
Tipo: Circular Técnica (INFOTECA-E)
Palavras-chave: Tomate rasteiro; Macronutriente; Submédio São Francisco; Sulphur; Micronutrients; Tomato.; Tomate; Adubação; Cálcio; Enxofre; Fósforo; Magnésio; Lycopersicon Esculentum; Nitrogênio; Potássio.; Fertilizer application; Calcium; Magnesium; Nitrogen; Phosphorus; Potassium; Tomatoes.
Ano: 2000
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/134212

Metodologia para processamento de imagens digitais do sistema radicular de milho e sorgo utilizando a plataforma Digital Imaging of Root Traits (DIRT).
Provedor de dados: 14
Autores: SANTOS, T. T.; SOUSA, S. M. de; CAMPOLINO, M. L.; LANA, U. G. de P.; COELHO, A. M.
Neste trabalho, apresentamos uma nova metodologia para segmentação e identificação de itens em imagens, baseada em aprendizado de máquina, que é mais robusta que a metodologia de pré-processamento de imagens originalmente proposta para o DIRT.
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Metodologia; Processamento de imagem digital; Digital Imaging of Root Traits; Raiz de planta; Aprendizado de máquina; Shovelomics; Árvore de decisão; Image processing; Machine learning; Decision tree; Fósforo; Digital images; Phosphorus; Roots; Image analysis.
Ano: 2019
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1117049

Fontes alternativas de fósforo na alimentação de suínos em crescimento e terminação.
Provedor de dados: 14
Autores: GOMES, P. C.; BELLAVER, C.; FIALHO, E. T.; PROTAS, J. F. da S.; GOMES, M. F. M.
bitstream/item/59141/1/CUsersPiazzonDocuments64.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Ration; Growing.; Crescimento; Fósforo; Ração; Terminação.; Suíno; Finishing; Phosphorus; Swine.
Ano: 1983
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/435278

Rendimento de matéria seca e composição química de genótipo de desmodium em Rondônia.
Provedor de dados: 14
Autores: COSTA, N. de L.; OLIVEIRA, J. R. da C.
O potencial forrageiro de dez genótipos de Desmodium foi avaliado em experimento conduzido em Porto Velho, Rondônia. O delineamento experimental adotado foi o de blocos casualizados com três repetições. Foram avaliados cinco genótipos de D. ovalifolium (CIAT-350, CIAT-3666, CIAT-3673, CIAT-3774 e CIAT-3784), quatro de D. heterophilum (CIAT-349, CIAT-365, CIAT-3782 e CIAT-3791) e um de D. canum (CIAT-3522). No período chuvoso, os maiores rendimentos de matéria seca foram proporcionados por D. ovalifolium CIAT-350, CIAT-3784 e D. canum CIAT-3522. No período seco, o D. ovalifolium CIAT-3673, CIAT-350 e D. canum CIAT-3522 foram os genótipos mais produtivos. Os maiores teores médios de PB foram verificados em D. heterophilum CIAT-349 e CIAT-365, os quais não...
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Dry matter.; Cálcio; Digestibilidade; Fósforo; Matéria Seca; Magnésio; Proteína.; Potássio; Calcium; Crude protein; Digestibility; Magnesium; Potassium.; Phosphorus.
Ano: 2001
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/982865

Modificação de características químicas em solos de Mato Grosso do Sul incubados com escórias de siderurgia.
Provedor de dados: 14
Autores: LIMA FILHO, O. F. de.
As escórias de aciaria (LD) e de alto-forno (AF), coprodutos da indústria siderúrgica, podem ser utilizadas como corretivos do solo e fontes de silício. Com o objetivo de avaliar o efeito de doses crescentes de duas escórias (LD e AF), sobre as características químicas de três solos de MS, foi realizado um ensaio de incubação com e sem calagem prévia. Foram utilizadas amostras da camada de 0 ? 20 cm de três solos de Mato Grosso do Sul (MS) - Latossolo Vermelho distroférrico álico (argiloso), LVdfa; Latossolo Vermelho distrófico (franco arenoso), LVd; Argissolo Vermelho distrófico (arenoso), PVd. A primeira incubação foi realizada com a ausência ou adição de CaCO + 3 MgCO p.a, neste último caso visando aumentar a saturação por bases para 3 60%. Na segunda...
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Silicato; Silicate; Fertility; Nutrient.; Fertilidade; Fósforo; Nutriente; Potássio; Silício.; Potassium; Phosphorus; Silicon.
Ano: 2011
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/933979

II Curso sobre a biologia do solo na agricultura.
Provedor de dados: 14
Autores: ASSIS, R. L. de; SOUTO, S. M.; DUQUE, F. F.; ALMEIDA, D. L. de; MUELLER, K. E. K.
Nitogênio. Fixação de nitrogênio atmosférico na simbiose Rhizobium- leguminosas. Nodulação das leguminosas. Fatores do solo. Fatores climáticos. Fixação de nitrogênio em gramíneas. Microrganismos do solo e aproveitamento de fósforo pelas plantas. O papel das micorrizas. Outos microrganismos. Matéria orgânica do solo: Dinâmica e importância na conservação do solo e produtividade agrícola. Classificação das substâncias no solo. Microorganismos e transformação da matéria orgânica no solo. A biomassa microbiana do solo. Adição de matéria orgânica ao solo: Adubação orgânica/verde. Sistemas agrícolas adequadas a utilização da fixação biológicas no nitrogênio. Rotação planejada de culturas. Consorciação de culturas. Cultivo em faixas. Sistemas agrosilvopastorais....
Tipo: Documentos (INFOTECA-E)
Palavras-chave: P; Fixação biológica de nitrogênio; FBN; Biological nitrogen fixation; BNF.; Absorção; Adubação Verde; Biologia do Solo; Cana de Açúcar; Fertilidade do Solo; Fósforo; Gramínea; Gesso; Leguminosa Forrageira; Micorriza Vesicular Arbuscular; Palha.; Absorption; Gypsum; Grasses; Forage legumes; Green manures; Phosphorus; Soil biology; Soil fertility; Sugarcane; Vesicular arbuscular mycorrhizae.
Ano: 1992
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/623722

Determinação do fósforo remanescente para a avaliação da disponibilidade de fósforo em solos do Estado do Acre.
Provedor de dados: 14
Autores: WADT, P. G. S.; SILVA, L. M. da.
Dentre os 17 elementos essenciais à nutrição das plantas, o nitrogênio (N), fósforo (P) e potássio (K) são requeridos em maiores quantidades nas adubações. Em países de regiões tropicais, como o Brasil, o P é geralmente recomendado em maiores proporções nas adubações, devido aos processos de fixação desse elemento que ocorrem nos solos nessas regiões. A disponibilidade de fósforo às plantas tem sido avaliada por vários extratores químicos que quantificam o P em solução e uma fração variável do P-lábil do solo. Entretanto, a disponibilidade de P do solo é dependente do FCP, o qual apresenta estreita correlação com o P remanescente (quantidade do fósforo adicionado que fica na solução de equilíbrio após determinado tempo de contato com o solo, P-rem),...
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Acre; Amazônia Ocidental; Western Amazon; Amazonia Occidental; Interacciones suelo-plantas; Nutrientes del suelo.; Nutrición de las plantas; Fixação de fósforo; Química do solo; Adubação; Relação Solo-Planta; Nutrição vegetal; Fósforo.; Phosphorus; Plant nutrition; Soil-plant interactions.; Soil nutrients.
Ano: 2011
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/916454

Avaliação de gramíneas forrageiras em área de mangue da Ilha de Marajó.
Provedor de dados: 14
Autores: NASCIMENTO, C. N. B. do; CARVALHO, L. O. D. de M.; CAMARÃO, A. P.; SALIMOS, E. P.
bitstream/item/31973/1/CPATU-BP93.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Terra inundavel; Intervalo de corte; Marajo; Pará; Brasil; Floodable land; Mangrove; Forage grass; Dry matter; Cut interval.; Cálcio; Fósforo; Gramínea Forrageira; Matéria Seca; Mangue; Magnésio; Potássio; Proteína Bruta.; Amazonia; Crude protein; Calcium; Magnesium; Phosphorus; Potassium.
Ano: 1988
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/383635

Eficiencia nutricional do milho em resposta a fontes e modos de aplicacao de fosforo.
Provedor de dados: 14
Autores: RESENDE, A. V.; FURTINI NETO, A. E.; ARAUJO, I. B.; ALVES, V. M. C.; SANTOS, J. Z. L.; VILELA, L. S.
bitstream/CPAC-2009/24151/1/p2002_36.pdf
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Phosphate fertilizers; Maize.; Fertilidade do Solo; Fertilizante Fosfatado; Fósforo; Milho; Zea Mays.; Phosphorus; Soil fertility.
Ano: 2004
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/567458

Influência da adubação com nitrogênio, fósforo e potássio na formação de mudas de jaborandi.
Provedor de dados: 14
Autores: BRASIL, E. C.; VIEGAS, I. de J. M.
bitstream/item/59292/1/CPATU-ComTec100.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Produção de matéria seca; Belém; Pará; Brasil; Drug plants.; Adubação; Fósforo; Jaborandi; Muda; Nitrogênio; Potássio.; Planta Medicinal; Amazonia; Dry matter content; Fertilizer application; Potassium; Nitrogen; Phosphorus; Seedlings.
Ano: 1999
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/375904

Efeito de níveis de nitrogênio e fósforo na recuperação de pastagens de Brachiaria brizantha cv. Marandu.
Provedor de dados: 14
Autores: COSTA, N. de L.; TOWNSEND, C. R.; MAGALHAES, J. A.
Procurou-se avaliar os efeitos de niveis de nitrogenio e fosforo sobre rendimento e composicao quimica da forragem de pastagens degradadas de Brachiaria brizantha cv. Marandu. Conclui-se que: Adubacao com nitrogenio e fosforo mostrou-se uma pratica agronomica tecnicamente viavel para recuperacao de pastagens de B. brizantha cv. Marandu; Rendimentos de MS, teores de PB e fosforo da graminea foram significativamente incrementados com aplicacao de niveis crescentes de nitrogenio e fosforo, ocorrendo o inverso em relacao as plantas invasoras; Aplicacao conjunta de 50kg de N/ha e de 100kg de P2 O5/ha foi suficiente para assegurar a recuperacao da pastagem, proporcionando resultados semelhantes aos obtidos com niveis maximos dos nutrientes.
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Brachiaria brizantha cv Marandu; Embrapa Rondônia; Porto Velho (RO); Rondônia; Amazônia Ocidental; Western Amazon.; Gramínea Forrageira; Capim Brachiaria; Fósforo; Nitrogênio; Campo Experimental; Pastagem; Recuperação do Solo.; Rendimento; Composição Química; Fertilidade do Solo; Forage grasses; Urochloa brizantha; Nitrogen; Crop yield.; Chemical composition; Phosphorus.
Ano: 1996
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/699887

Aspectos relacionados ao manejo da adubação fosfatada em solos do Cerrado.
Provedor de dados: 14
Autores: RESENDE, A. V. de; FURTINI NETO, A. E.
ABSTRACT: The management of phosphate fertilization in the Cerrado soils has been studied for almost 40 years and represents an extremely important technology towards to a successfull agricultural exploration of the region. However, many aspects related to soil phosphorus dynamic, availability, and its use efficiency by crops remain not well understood, and are relevant research themes. The possible utilization of distinct solubility phosphates, the field cropping history, and the influence of crop systems involving no tillage or crop-livestock integration may affect the efficiency of different fertilization strategies. This publication is a review about some of these topics and their relationship to the evolution of soil management in the Cerrado Region.
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Phosphate fertilizer.; Adubação; Fertilidade do Solo; Fósforo.; Fertilizante Fosfatado; Fertilizer application; Phosphorus; Soil fertility.
Ano: 2007
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/572251

Phosphorus and zinc fertilization for cowpea in Amazonia.
Provedor de dados: 14
Autores: RODRIGUES, J. E. L. F.; ARAUJO, S. M. B.; OLIVEIRA, R. P. de; BASTOS, E. A.; RODRIGUES, M. C. S. F.
Fertilização com fósforo (P) pode aumentar a exigência de zinco (Zn) do feijão-caupi para produção de grãos. O objetivo deste estudo foi avaliar os efeitos de doses de P e Zn em cultivares de feijão-caupi em condições de campo na Amazônia. As cultivares foram BRS Imponente e BRS Tumucumaque. Cada cultivar foi estudada separadamente em um experimento de campo. Os experimentos foram fatoriais 4 x 4 em delineamento em blocos ao acaso com três repetições. Os tratamentos em cada experimento foram combinações de doses de P (0 kg/ha, 40 kg/ha, 80 kg/ha e 120 kg/ha de P2O5) e Zn (0 kg/ha, 2 kg/ha, 4 kg/ha e 6 kg/ha de Zn). Aplicação de P aumentou a produtividade de grãos de ambas as cultivares. Resposta à aplicação de Zn foi constatada somente para a cultivar BRS...
Tipo: Folhetos
Palavras-chave: Feijão; Fertilizante; Fósforo; Zinco; Vigna Unguiculata; Cowpeas; Fertilizers; Phosphorus; Zinc; Zinc fertilizers.
Ano: 2022
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1139122

Teores de minerais do capim quicuio-da-amazônia (Brachiaria humidicola) em três idades.
Provedor de dados: 14
Autores: MATOS, A. de O.; CAMARAO, A. P.; BATISTA, H. A. M.
bitstream/item/57872/1/CPATU-ComTec60.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Quicuio-da-amazônia; Teor; Belém; Pará; Brasil; Grass; Analysis.; Análise; Brachiaria Humidicola; Cálcio; Fósforo; Gramínea; Magnésio; Mineral; Potássio.; Amazonia; Calcium; Magnesium; Phosphorus; Potassium.
Ano: 1987
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/383761

Teores de fósforo e potássio do capim quicuio-da-amazônia (Brachiaria humidicola).
Provedor de dados: 14
Autores: CAMARAO, A. P.; MATOS, A. de O.; BATISTA, H. A. M.
bitstream/item/57598/1/CPATU-ComTec52.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Quicuio-da-amazônia; Teor; Pará; Brasil; Analysis.; Análise; Brachiaria Humidicola; Fósforo; Potássio.; Amazonia; Phosphorus; Potassium.
Ano: 1984
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/383517

Girassol: nutricao mineral e adubacao.
Provedor de dados: 14
Autores: SFREDO, G. J.; CAMPO, R. J.; SARRUGE, J. R.
Exigencias nutricionais; Efeitos dos nutrientes essenciais; Calagem e adubacao.
Tipo: Circular Técnica (INFOTECA-E)
Palavras-chave: Nutricao mineral; Brasil; Sunflower; Fertilization; Sulphur.; Adubação; Calagem; Boro; Cálcio; Cobre; Ferro; Enxofre; Fósforo; Girassol; Magnésio; Manganês; Nitrogênio; Molibdênio; Potássio; Zinco.; Brazil; Boron; Copper; Calcium; Liming; Magnesium; Manganese; Iron; Nutrition; Molybdenum; Nitrogen; Phosphorus; Potassium; Zinc.
Ano: 1984
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/445619

Microrganismos e disponibilidade de fósforo (P) nos solos: uma análise crítica.
Provedor de dados: 14
Autores: MENDES, I. de C.; REIS JUNIOR, F. B. dos.
ABSTRACT: Cerrado soils are extremely old, highly weathered and depleted in essential nutrients, especially P. For this reason, the addition of P fertilizers is mandatory in order to obtain economical yields of annual crops. Soil microorganisms play a key role in the P cycle. The P immobilized in the soil microbial biomass acts as reservoir of this element. Soil microorganisms also produce enzymes that act in the P mineralization, participate in the solubilization of inorganic phosphorus and are able to form symbiosis with plants, denominated mycorrizha, enhancing the uptake of this element. In this review we discuss the results of several studies evaluating the use of soil microorganisms to increase P availability in soils, some of the difficulties...
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Fósforo; Inoculação; Microbiologia do Solo; Mineralização; Microrganismo; Solubilização.; Inoculation methods; Microbiology; Microorganisms; Mineralization; Phosphorus; Solubilization.; Soil.
Ano: 2003
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/568171

Efeito da aplicacao profunda de calcio e fosforo.
Provedor de dados: 14
Autores: KAWASAKI, H.; IWATA, F.; MESQUITA FILHO, M. V. de.
bitstream/item/178531/1/ID06800-CRI1517.pdf
Tipo: Capítulo em livro técnico (INFOTECA-E)
Palavras-chave: Japão; Brasil; BIBJICACPAC.; Cálcio; Cerrado; Fósforo; Solo; Pesquisa; Cooperação Internacional.; Calcium; Phosphorus; Soil.
Ano: 1981
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/552988

Níveis de fósforo, potássio e calcario para o cultivo de soja em solos de campos cerrados do Amapá.
Provedor de dados: 14
Autores: FIGUEIREDO, F. J. C.; LOPES, O. M. N.; FARIAS NETO, J. T. de.
O Amapá possui cerca de um milhão de hectares de áreas de cerrado. Essas áreas, embora sejam potencialmente capazes de serem aproveitadas para produzir alimentos, apresentam limitações de fertilidade, especialmente daqueles elementos indispensaveis ao desenvolvimento das plantas. Assim, para que essas áreas sejam ocupadas de forma racional, e de fundamental importância o desenvolvimento de pesquisas que possam tornar esse ecossistema viavel, bem como a seleção de espécies potencialmente capazes de se adaptarem a essas condições edafo-climáticas. Nesse aspecto a soja aparece como uma provavel alternativa agroeconomica.
Tipo: Outras publicações técnicas (INFOTECA-E)
Palavras-chave: Brasil; Amapá; Calcareous.; Calcário; Cerrado; Fósforo; Glycine Max; Potássio; Soja.; Brazil; Potassium; Phosphorus; Soybeans.; Savannas.
Ano: 1984
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/341777

Adubação química de cultivares de pimenta-do-reino (Piper nigrum L.) em latossolo amarelo da rodovia Transamazônica.
Provedor de dados: 14
Autores: VELOSO, C. A. C.; KATO, O. R.; ALBUQUERQUE, F. C. de; BRANDÃO, G. R.
bitstream/item/61692/1/Belem-ComTec1.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Pimenta-do-reino; Cultivar; Rodovia Transamazônica; Altamira; Marabá; Pará; Brasil; Black papper; Fertilizer; Variety; Yellow latosol; Production.; Adubação; Fósforo; Latossolo Amarelo; Nitrogênio; Piper Nigrum; Potássio; Produção.; Amazonia; Phosphorus; Nitrogen; Potassium.
Ano: 1988
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/381259

Adubação do tomateiro rasteiro no submédio São Francisco.
Provedor de dados: 14
Autores: FARIA, C. M. B. de; PEREIRA, J. R.; COSTA, N. D.; SOARES, J. M.; PINTO, J. M.
Introdução; Solo; Absorção de nutrientes; Adubação e função dos nutrientes na colheita; Nitrogênio; Fósforo; Potássio; Cálcio; Micronutrientes; Conlusões; referências bibliográficas.
Tipo: Circular Técnica (INFOTECA-E)
Palavras-chave: Macronutriente; Brasil; Submédio São Francisco; Sulphur; Micronutrients.; Adubação; Cálcio; Enxofre; Fósforo; Lycopersicon Esculentum; Magnésio; Nitrogênio; Potássio; Tomate.; Fertilizer application; Brazil; Calcium; Magnesium; Potassium; Phosphorus; Nitrogen; Tomatoes.
Ano: 2000
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/510594

Resposta da seringueira à aplicação de nitrogênio, fósforo e potássio em latossolo amarelo textura média, Ilha do Mosqueiro, Pará.
Provedor de dados: 14
Autores: VIEGAS, I. de J. M.; OLIVEIRA, R. F. de; CRUZ, E. de S.; AZEVEDO, C. E. de.
bitstream/item/32070/1/CPATU-BP125.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Desenvolvimento; Ilha do Mosqueiro; Belem; Pará; Brasil; Rubber tree; Yellow latosol; Developemt; Fertilizer.; Adubação; Fósforo; Latossolo Amarelo; Nitrogênio; Potássio; Seringueira.; Amazonia; Potassium.; Phosphorus; Nitrogen.
Ano: 1992
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/381271

Dotacao de rega do feijoeiro influenciada por regimes hidricos e adubacao fosfatada.
Provedor de dados: 14
Autores: AZEVEDO, J. A. de; MIRANDA, L. N. de; GOMES, A. C.
bitstream/CPAC-2009/24147/1/p2002_32.pdf
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Bean; Phosphate fertilizers.; Água; Feijão; Fósforo; Fertilizante Fosfatado; Manejo de Água; Irrigação por Aspersão; Phaseolus Vulgaris; Solo.; Phosphorus; Soil; Sprinkler irrigation; Water management.; Water.
Ano: 2004
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/567454

Limitações de fertilidade do solo na recuperação de pastagem degradada de capim colonião (Panicum maximum Jacq.) em Paragominas, na Amazônia Oriental.
Provedor de dados: 14
Autores: DIAS FILHO, M. B.; SERRÃO, E. A. S.
bitstream/item/31964/1/CPATU-BP87.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Pastagem degradada; Paragominas; Pará; Brasil; Leguminous; Fertility; Production; Degraded pasture; Dry matter; Fertilization.; Adubação; Calagem; Capim Colonião; Fertilidade; Enxofre; Fósforo; Matéria Seca; Leguminosa; Nitrogênio; Panicum Maximum; Produção; Solo.; Amazonia; Liming; Phosphorus; Nitrogen; Soil; Sulfur.
Ano: 1987
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/383651

Manejo da adubação fosfatada para a cultura do feijoeiro irrigado em solo de cerrado.
Provedor de dados: 14
Autores: MIRANDA, L. N. de; AZEVEDO, J. A. de; MIRANDA, J. C. C. de; GOMES, A. C.
bitstream/CPAC-2009/24543/1/comtec_68.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Phosphate fertilizer.; Adubação; Cerrado; Efeito Residual; Feijão; Fertilizante Fosfatado; Fósforo; Irrigação; Phaseolus Vulgaris.; Beans; Fertilizer application; Irrigation; Phosphorus; Residual effects.
Ano: 2002
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/553058

Consumo de sal e fosforo por bovinos na sub-regiao da Nhecolandia do Pantanal Mato-Grossense.
Provedor de dados: 14
Autores: POTT, E. B.
Relata-se a medicao de consumo de mistura de sal comum com fosfato bicalcico por dois rebanhos de cria em pastagens se "salina" em duas fazendas na parte central da sub-regiao da Nhecolandia. Uma das misturas continha 38,5% de sal comum e a outra 55,6%. O acompanhamento durou dois anos. O consumo medio diario por matriz, no caso da primeira mistura, foi de 12 g de sal comum e 19 g de fosfato bicalcico; e da segunda, 19 g de sal comum e 15 g de fosfato bicalcico. Em funcao do baixo consumo de sal, recomendou-se a inclusao de palatabilizantes em suplementos minerais para bovinos dessa parte do Pantanal, a fim de induzir consumo adequado dos nutrientes minerais deficientes nas pastagens.
Tipo: Outras publicações técnicas (INFOTECA-E)
Palavras-chave: Nhecolandia; Bovine; Mineral supplement.; Bovino; Consumo; Fósforo; Sal; Suplemento Mineral.; Phosphorus; Sodium chloride.
Ano: 1987
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/787752

Fontes nao convencionais de fosforo para suinos e aves.
Provedor de dados: 14
Autores: GOMES, P. C.
Niveis de fluor nos folfatos; Disponibilidade de fosforo; Fosfatos na racao de suinos e aves; Suinos; Aves.
Tipo: Circular Técnica (INFOTECA-E)
Palavras-chave: Ration.; Fósforo; Ração; Suíno.; Phosphorus; Swine.
Ano: 1995
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/433731

Efeito da inundação sobre as propriedades de um glei pouco húmico de várzea do rio Guamá, nos municípios de Belém e Santa Isabel, PA.
Provedor de dados: 14
Autores: FERREIRA, W. de A.; MODESTO JUNIOR, M. de S.; BOTELHO, S. M.; MASCARENHAS, R. E. B.
bitstream/item/48875/1/Boletim-Pesquisa-207-CPATU.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Solo de varzea; Rio Guamá; Santa Isabel; Belém; Pará; Brasil; Flooded land; Chemicophysical properties; Fertility.; Cobre; Fertilidade; Fósforo; Manganês; Macroelemento; Ph; Propriedade Físico-Química; Zinco.; Amazonia; Manganese; Phosphorus; Trace elements; Zinc.
Ano: 1998
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/376638

Efeito residual da adubação fosfatada para a cultura do arroz em solo de cerrado.
Provedor de dados: 14
Autores: MIRANDA, L. N. de; MIRANDA, J. C. C. de.
bitstream/CPAC-2009/24556/1/comtec_87.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Phosphate fertilizers.; Adubação; Arroz; Cerrado; Efeito Residual; Fósforo; Fertilizante Fosfatado; Oryza Sativa.; Fertilizer application; Phosphorus; Residual effects; Rice.
Ano: 2003
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/558014

Pesquisa com pastagem na região de Altamira, PA: resultados preliminares.
Provedor de dados: 14
Autores: AZEVEDO, G. P. C. de; SOUZA, F. R. S. de.
bitstream/item/61344/1/Altamira-Doc1.pdf
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Consorciação; Altamira; Pará; Brasil; Pasture; Leguminous; Fertilizer; Dry matter; Production.; Adubação; Capim Colonião; Fósforo; Matéria Seca; Leguminosa; Pastagem; Pesquisa; Produção.; Amazonia; Intercropping; Phosphorus; Research.
Ano: 1982
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/382539

A cana-de-açúcar na Transamazônica, PA: resultados de 8 anos de pesquisa, 1974/82.
Provedor de dados: 14
Autores: POLTRONIERI, L. S.; ROCHA, A. C. P. N. da; COSTA, M. S.
bitstream/item/57751/1/Altamira-Doc5.pdf
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Cana-de-açúcar; Cultivar; Sacharum officinarum; Transamazônica; Pará; Brasil; Sugar cane; Fertilizer; Yield; Variety.; Adubação; Fósforo; Pesquisa; Produtividade.; Amazonia; Phosphorus; Research.
Ano: 1982
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/383049

Superfosfato triplo como fonte alternativa de fosforo no sal mineral de gado de corte.
Provedor de dados: 14
Autores: LOPES, H. O. da S.; PEREIRA, E. A.; SOARES, W. V.; PEREIRA, G.; FICHTNER, S. S.; VITTI, D. M. S. S.; ABDALLA, A. L.
bitstream/item/99408/1/comtec-68.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Mineral nutrients; Brazilian savanna.; Cerrado; Fósforo; Gado de Corte; Nutrição Animal; Sais Minerais; Suplemento Mineral.; Superfosfato; Animal nutrition; Beef cattle; Phosphorus; Salts; Superphosphate.
Ano: 1994
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/549900

Principios metodologicos para avaliacao agronomica de fontes de fosforo.
Provedor de dados: 14
Autores: GOEDERT, W. J.; SOUSA, D. M. G. de; REIN, T. A.
bitstream/item/101065/1/doc-22.pdf
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Avaliacao; Phosphate fertilizers; Evaluation; Methods; Avaliação agronômica; Fertilização; Fertilization; Fontes; Fontes de fósforo; Metodologia; Nutrientes; Phosphate; Princípios metodológicos; Soil fertilization.; Adubo; Adubação; Fertilizante; Fertilizante Fosfatado; Fósforo; Método de Pesquisa; Solo.; Phosphorus; Methodology; Soil.
Ano: 1986
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/549456

Adubação orgânica e mineral na cultura do melão em um vertissolo do Submédio São Francisco.
Provedor de dados: 14
Autores: FARIA, C. M. B. de; PEREIRA, J. R.; POSSIDIO, E. L. de.
Determinacao de niveis adequados de adubacao N, P e K na cultura do melao e verificar sua resposta a aplicacao de materia organica.
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Eldorado 300; Fertilização; Organic fertilizer; Manure; Melon.; Melão; Solo; Adubação; Cucumis Melo; Fósforo; Matéria Orgânica; Irrigação; Nitrogênio; Potássio; Vertissolo.; Irrigation; Melons; Nitrogen; Potassium; Phosphorus; Soil.
Ano: 1995
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/132024

Fertilizantes.
Provedor de dados: 14
Autores: MESSIAS, A. S.; SILVA, D. J.; FREIRE, F. J.; SILVA, M. C. L. da.
Nitrogenados; Fosfatados; Potassicos; Organicos; Micronutrientes; Fertilizantes simples e formulacoes comerciais; Epocas e modos de aplicacao de fertilizantes.
Tipo: Capítulo em livro técnico (INFOTECA-E)
Palavras-chave: Micronutriente; Adubo; Corretivo; Fertilizante; Fósforo; Matéria Orgânica; Nitrogênio; Potássio; Solo; Fertilizer application; Nitrogen; Organic matter; Phosphorus; Potassium; Trace elements; Soil.
Ano: 1998
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/132544

Pesquisas em fertilidade do solo para o algodão cultivado no Cerrado do oeste da Bahia: safra 2006/2007.
Provedor de dados: 14
Autores: SANTOS, F. C. dos; ALBUQUERQUE FILHO, M. R. de; PEDROSA, M. B.; FERREIRA, G. B.; SILVA FILHO, J. L. da; SANTOS, J. B. dos; CARVALHO, M. da C. S.; BARBOSA, C. A. S.; FREIRE, R. M. M.
bitstream/CPAC-2009/28958/1/doc_208.pdf
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Adubação; Algodão; Fertilizante; Fósforo; Nitrogênio; Potássio; Solo.; Fertilizer application; Fertilizers; Cotton; Nitrogen; Phosphorus; Potassium; Soil.
Ano: 2008
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/572304

Parametros cineticos de absorcao de fosforo e caracteristicas morfologicas do sistema radicular de variedades de milho.
Provedor de dados: 14
Autores: MACHADO, C. T. de T.; FURLANI, A. M. C.
bitstream/CPAC-2009/24168/1/p2002_55.pdf
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Maize.; Fósforo; Fisiologia Vegetal; Morfologia Vegetal; Milho; Nutrição Vegetal; Variedade; Zea Mays.; Plant nutrition; Plant physiology; Phosphorus; Plant anatomy; Varieties.
Ano: 2004
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/567477

Estudo do comportamento da cultura do amendoim na presença de diversos tipos de calcário e do adubo concentrado ultra fertil.
Provedor de dados: 14
Autores: SANTOS, A. I. M. dos; CONDURU, J. M. P.; KASS, D. L.
bitstream/item/152502/1/Comunicado19.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Fertilizer; Peanut; Calcareous; Yield.; Amendoim; Adubação; Calcário; Fósforo; Produtividade.; Potássio; Phosphorus; Potassium.
Ano: 1972
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/376313

Efeito da adubacao e calagem sobre o crescimento de carvoeiro.
Provedor de dados: 14
Autores: MELO, J. T. de.
bitstream/CPAC-2009/24657/1/bolpd_76.pdf
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Carvoeiro; Planta nativa; Fertilizacao; Indigenous organisms.; Calcário; Cerrado; Fósforo; Nitrogênio; Potássio; Sclerolobium Paniculatum.; Reflorestamento; Fertilizer application; Limestone; Phosphorus; Nitrogen; Potassium; Reforestation.
Ano: 2002
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/559121

Fontes alternativas de fósforo no desempenho e características dos ossos de suínos em crescimento e terminação.
Provedor de dados: 14
Autores: BARBOSA, H. P.; FIALHO, E. T.; GOMES, P. C.
bitstream/item/58662/1/CUsersPiazzonDocuments185.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Raç/ao; Ossos; Ration; Bone; Growing.; Crescimento; Fósforo; Terminação.; Suíno; Finishing; Phosphorus; Swine.
Ano: 1992
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/433918

Influência da inoculação com fungos micorrízicos e níveis crescentes de P no crescimento inicial de Taxi dos campos (Sclerolobium paniculatum Vogel).
Provedor de dados: 14
Autores: TELES, C. S.; SILVA, M. F. da; SOUZA, F. A. de; FRANCO, A. A.
bitstream/CNPAB-2010/27163/1/cot034.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Espécie florestal; P; Growth; Inoculation.; Crescimento; Essência Florestal; Fungo; Fósforo; Inoculação; Micorriza Vesicular Arbuscular; Sclerolobium Paniculatum; Taxi Branco.; Fungi; Phosphorus; Vesicular arbuscular mycorrhizae.
Ano: 1999
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/623871

Avaliação de uma rocha ígnea como corretivo de acidez e disponibilização de nutrientes para as plantas.
Provedor de dados: 14
Autores: ANDRADE, L. R. M. de; MARTINS, E. de S.; MENDES, I. de C.
RESUMO: O objetivo deste trabalho foi avaliar o potencial da rocha fresca carbonatito, proveniente da mina de fosfato localizada em Catalão - GO, como um possível fonte de insumos para a agricultura. O ensaio foi conduzido no campo, com o objetivo de avaliar o potencial de carbonatito como fonte de: (a) P; e, (b) K, para uma pastagem de Brachiaria ruziziensis. Foram realizados três cortes (abril/2000, fevereiro e maio/2001) das plantas e amostragem de solo e do tecido para análises químicas. Os resultados obtidos aos 560 dias depois da aplicação do carbonatito (CBT) demonstram que a maior produção de matéria seca (MS) foi atingida com a aplicação de 200 kg P2O5 / ha ) na forma solúvel. Não houve efeitos significativos do CBT como fonte de P na produção de...
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: PVGSOL200; Correcao do solo; Rock.; Acidez do Solo; Calcário; Corretivo; Fósforo; Magnesito; Insumo; Nutriente; Pastagem; Potássio; Rocha; Solo.; Farm inputs; Calcite; Liming; Phosphorus; Nutrients; Pastures; Potassium; Soil pH.; Soil amendments.
Ano: 2002
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/563943

Importância da micorriza arbuscular para o cultivo da mandioca na região do cerrado.
Provedor de dados: 14
Autores: MIRANDA, J. C. C. de; FIALHO, J. de F.; MIRANDA. L. N. de.
ABSTRACT: Cassava plants are highly dependent on arbuscular mycorrhiza for its optimum growth. Its cultivation in cerrado soil requires soil and culture management as soil liming and fertilization and crop rotation. Though, higher plant growth and root yield are attained and applied inputs are better usen when the cassava plants are mycorrhizal. The adequate liming and fertilization procedures and rotational crop sequences, improve the native community of those fungi in the soil, in quantity and quality, by favoring the re-establishment of species efficient for the crop. Mycorrhiza contribution to cassava growth and root production occurs even in soils well fertilized, resulting in higher productivity.
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Maninhot esculenta; Phosphate fertilizers.; Cerrado; Fósforo; Fungo; Fertilizante Fosfatado; Mandioca; Micorriza; Solo.; Cassava; Fungi; Phosphorus; Mycorrhizae; Soil.
Ano: 2005
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/570022

Doses de NPK para formacao de seringais em solos de cerrado.
Provedor de dados: 14
Autores: PEREIRA, A. V.; PEREIRA, E. B. C.; FIALHO, J. de F.; JUNQUEIRA, N. T. V.; GOMES, A. C.
bitstream/CPAC-2009/24145/1/p2002_31.pdf
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Resposta de planta.; Adubação; Cerrado; Fertilizante; Fósforo; Hevea Brasiliensis; Nitrogênio; Potássio; Seringueira.; Fertilizer application; Fertilizers; Nitrogen; Plant response; Phosphorus; Potassium.
Ano: 2004
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/567452

Principais deficiências minerais em bovinos de corte.
Provedor de dados: 14
Autores: MORAES, S. da S.
Deficiências e desequilíbrios minerais em bovinos são descritas em quase todas as regiões do mundo. Os elementos minerais comumente deficientes para bovinos com dieta exclusiva de pasto são: P, Na, I, Cu, Co, e Se. Em algumas regiões sob condições especificas, Ca, Mg e Mn. Por outro lado, Fe e Mn estão, normalmente, em excesso nas regiões do Cerrado Central do Brasil e Pantanal. A ingestão de dietas deficientes ou desequilibradas de elementos minerais torna mais difícil a manutenção de concentrações ótimas nos tecidos . No inicio, causa lesões bioquímicas que induzem a trocas nas formas de funcionamento, concentração e atividade do elemento nos fluidos e tecidos do corpo. Essas alterações diferem conforme os elementos e suas funções, com o grau de duração...
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Bovino de corte; Brasil; Mineral deficiencies; Sulphur; Yodine.; Cálcio; Cloro; Cobre; Cobalto; Deficiência Mineral; Ferro; Enxofre; Fósforo; Manganês; Magnésio; Iodo; Potássio; Selênio; Sódio; Zinco.; Calcium; Cobalt; Copper; Brazil; Beef cattle; Chlorine; Iron; Magnesium; Manganese; Phosphorus; Potassium; Sodium; Selenium; Zinc.
Ano: 2001
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/325198

Efeito do fósforo no desenvolvimento de clones de seringueira e sua ação na disponibilidade de zinco.
Provedor de dados: 14
Autores: VIEGAS, I. de J. M.; ALVES, R. M.
bitstream/item/32018/1/CPATU-BP116.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Desenvolvimento; Ilha do Mosqueiro; Pará; Brasil; Rubber tree; Yellow latosol; Fertilizer; Development.; Adubação; Clone; Fósforo; Hevea Brasiliensis; Latossolo Amarelo; Seringueira; Zinco.; Amazonia; Phosphorus; Zinc.
Ano: 1991
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/381205

Resposta de Andropogon gayanus cv. Planaltina á inoculação de fungos endomicorrizicos.
Provedor de dados: 14
Autores: LEÔNIDAS, F. das C.; COSTA, N. de L.; MIRANDA, J. C. C. de; PAULINO, V. T.; COSTA, R. S. C. da.
Avalia efeito da inoculacao de especie de fungos micorrizicos nativos e niveis de fosforo sobre producao de materia seca de Andropogon gayanus cv. Planaltina. Experimento conduzido na casa-de-vegetacao da Embrapa-Centro de Pesquisa Agroflorestal de Rondonia. Delineamento experimental em blocos casualizados, com quatro repeticoes. Tratamentos foram quatro niveis de fosforo (0, 15, 30 e 60mg de P/Pg de solo) e duas especies de fungos endomicorrizicos nativos dos cerrados (Glomus occultum e Enthophospora colombiana). Conclui-se que a adubacao promoveu acrescimos significativos no rendimento de materia seca de A. gayanus cv. Planaltina, sendo os maiores valores obtidos com aplicacao de 60 ou 30mg de P/kg de solo. Independetemente da adubacao fosfatada G....
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Andropogon gayanus cv Planaltina; Glomus occultum; Entrophospora colombiana; Embrapa Rondônia; Porto Velho (RO); Rondônia; Western Amazon.; Amazônia Ocidental; Gramínea Forrageira; Capim Andropogon; Fungo; Inoculação; Micorriza; Rendimento; Absorção de Nutrientes; Fixação de Fósforo; Estufa; Campo Experimental.; Vesicular arbuscular mycorrhizae; Inoculation methods; Forage grasses; Greenhouses.; Crop yield; Phosphorus; Nutrient retention; Fungi.
Ano: 1995
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/697882

Desenvolvimento inicial da aroeirinha em áreas de Cerrado degradado.
Provedor de dados: 14
Autores: DUBOC, E.; GUERRINI, I. A.
RESUMO: A adição de nutrients pode aumentar a chance de sucesso dos plantios de recuperação de áreas degradadas, entretanto, existem poucos estudos sobre os efeitos da fertilização de espécies nativas do Bioma Cerrado. Este trabalho objetivou determinar o efeito sobre o crescimento e a sobrevivência de mudas de aroeirinha, na ausência de nitrogênio e a doses de 10, 20 e 40 kg/ha de N (uréia) e na ausência de fósforo e a doses de 10, 20 e 40 kg/ha de P (superfosfato triplo), plantadas em Latossolo Vermelho-Amarelo, ocupado com pastagem de Brachiaria decumbens. Foi avaliado o diâmetro do colo aos 4, 8 e 12 meses após o plantio e ao final do primeiro ano; o diâmetro de copa, a sobrevivência e a concentração foliar de nutrientes, Al e Na. A sobrevivência não...
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Planta nativa; Indigenous organisms; Revegetation; Código Florestal.; Árvore; Aroeira; Cerrado; Fósforo; Nitrogênio; Revegetação.; Nitrogen; Phosphorus; Trees.
Ano: 2007
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/572283

Morfologia do sistema radicular em solução nutritiva e eficiência no uso de P em híbridos testcrosses de milho.
Provedor de dados: 14
Autores: MENDES, F. F.; NEGRI, B. F.; SOUSA, S. M. de; GUIMARAES, L. J. M.; PARENTONI, S. N.; MAGALHAES, J. V. de; GUIMARAES, C. T.
Os solos tropicais se caracterizam pelos baixos teores de fósforo (P) na forma disponível para as plantas. Nesse sentido, a busca por cultivares mais eficientes na aquisição do P do solo e na utilização interna desse nutriente é uma alternativa para aumentar a produtividade do milho, reduzindo a necessidade de uso de fertilizantes fosfatados. A alteração na morfologia radicular é um dos mecanismos que está relacionado com o aumento da eficiência de aquisição de P pelas plantas. Neste contexto, os objetivos deste trabalho foram caracterizar uma população de testcrosses e obter correlações entre características radiculares e os índices de eficiência no uso de P. Para tanto, uma população de linhagens endogâmicas recombinantes (RILs) cruzada com um testador...
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Zea mays; Fósforo; Raiz; Phosphorus; Roots.
Ano: 2013
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/977090

Efeitos da inoculação de micorriza na produção de matéria orgânica de leguminosas arboreas e arbustivas.
Provedor de dados: 14
Autores: BLUM, E.
bitstream/item/57928/1/Doc40-p245-260.pdf
Tipo: Outras publicações técnicas (INFOTECA-E)
Palavras-chave: Árvore leguminosa; Produção de matéria orgânica; Absorção de nitrogênio; Absorção de fósforo; Capitão Poço; Pará; Brasil.; Inoculação; Micorriza.; Amazonia; Absorption; Inoculation methods; Legumes; Mycorrhizae; Nitrogen; Organic matter; Phosphorus; Trees.; Soil.
Ano: 1986
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/394731

Nutrientes nos solos de floresta primária e pastagem de Brachiaria humidicola na Amazônia Central.
Provedor de dados: 14
Autores: TEIXEIRA, L. B.; BASTOS, J. B.
bitstream/item/31994/1/CPATU-BP98.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Yelow latosol; Ecosystem.; Brachiaria Humidicola; Cálcio; Ecossistema; Fósforo; Latossolo; Latossolo Amarelo; Magnésio; Potássio; Solo.; Calcium; Magnesium; Potassium; Phosphorus; Soil.
Ano: 1989
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/381186

Influence de l'azote et du phosphore sur la croissance et la toxicité de Prorocentrum lima (Ehrenberg) Dodge
Provedor de dados: 5
Autores: Morlaix, Martine; Lassus, Patrick.
Very few attempts have been made in order to investigate the role of nutrients on cellular growth and toxin production in dinoflagellates associated with DSP (Diarrhetic Shellfish Poison). Some preliminary results are presented here, aiming at a better knowledge of inorganic nitrogen and organic phosphorus effects upon division rate and toxin content of Prorocentrum lima (PL2V spanish strain). Nitrogen have a positive effect on growth rate, up to a threshold value of 880muM.l-1. Above this threshold the rate decreases. There is no effect on toxin content since okadaic acid and DTX1 cell contents remain low (4.8 +/- 0.5 pg.cell.-1) and steady. Phosphorus effect upon division rate follows a non-linear relationship, whereas cellular toxic content is inversely...
Tipo: Text
Palavras-chave: Croissance; Toxicité; Concentration chimique; Division cellulaire; Production; Espagne; Phosphore; Azote; Europe; Nutriment; Milieu marin; Zone côtière; Ecotoxicologie; Pyrrophycophyta; Algae; Thallophyta; Okadaïque acide; Prorocentrum lima; Growth; Toxicity; Chemical concentration; Cell division; Production; Spain; Phosphorus; Nitrogen; Europe; Nutrient; Marine environment; Coastal zone; Ecotoxicology; Pyrrophycophyta; Algae; Thallophyta.
Ano: 1992
URL: http://archimer.ifremer.fr/doc/00133/24469/22483.pdf

Using geochronology to reconstruct the evolution of particulate phosphorus inputs during the past century in the Papeete Lagoon (French Polynesia)
Provedor de dados: 5
Autores: Harris, Pierre; Fichez, Renaud; Fernandez, Jean Michel; Golterman, Han; Badie, Christian.
During the past century, the sediment deposition rate has been assessed by measuring excess Pb-210 activity in a sediment core sampled in the harbour area of the Papeete Lagoon (Tahiti, French Polynesia). Dated sediment samples were analysed following a sequential extraction method to quantify five sedimentary phosphorus pools: loosely sorbed or exchangeable phosphorus, ferric iron-bound phosphorus, authigenic calcium carbonate associated phosphorus, detrital apatite and detritic inorganic phosphorus, acid organic phosphorus. Results from sediment dating showed the core to cover the period from 1865 to 1995, with a sharp change around 1957 corresponding to a doubling in sediment deposition rates. From the bottom to the top of the core, concentrations...
Tipo: Text
Palavras-chave: Géochronologie; Phosphore; Sédiment; Lagons coralliens; Geochronology; Phosphorus; Sediment; Coral reef lagoon.
Ano: 2001
URL: http://archimer.ifremer.fr/doc/00322/43365/42850.pdf

Eutrophication: A new wine in an old bottle?
Provedor de dados: 5
Autores: Le Moal, Morgane; Gascuel-odoux, Chantal; Menesguen, Alain; Souchon, Yves; Etrillard, Claire; Levain, Alix; Moatar, Florentina; Pannard, Alexandrine; Souchu, Philippe; Lefebvre, Alain; Pinay, Gilles.
Eutrophication is one of the most common causes of water quality impairment of inland and marine waters. Its best-known manifestations are toxic cyanobacteria blooms in lakes and waterways and proliferations of green macro algae in coastal areas. The term eutrophication is used by both the scientific community and public policy-makers, and therefore has a myriad of definitions. The introduction by the public authorities of regulations to limit eutrophication is a source of tension and debate on the activities identified as contributing or having contributed decisively to these phenomena. Debates on the identification of the driving factors and risk levels of eutrophication, seeking to guide public policies, have led the ministries in charge of the...
Tipo: Text
Palavras-chave: Eutrophication; Nitrogen; Phosphorus; Algae bloom; Land-sea continuum; Diffuse pollution.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00456/56734/58551.pdf

Regulation of nitrogen fixation from free-living organisms in soil and leaf litter of two tropical forests of the Guiana shield
Provedor de dados: 5
Autores: Van Langenhove, Leandro; Depaepe, Thomas; Vicca, Sara; Van Den Berge, Joke; Stahl, Clement; Courtois, Elodie; Weedon, James; Urbina, Ifigenia; Grau, Oriol; Asensio, Dolores; Peñuelas, Josep; Boeckx, Pascal; Richter, Andreas; Van Der Straeten, Dominique; Janssens, Ivan A.
Background and aims Biological fixation of atmospheric nitrogen (N2) is the main pathway for introducing N into unmanaged ecosystems. While recent estimates suggest that free-living N fixation (FLNF) accounts for the majority of N fixed in mature tropical forests, the controls governing this process are not completely understood. The aim of this study was to quantify FLNF rates and determine its drivers in two tropical pristine forests of French Guiana. Methods We used the acetylene reduction assay to measure FLNF rates at two sites, in two seasons and along three topographical positions, and used regression analyses to identify which edaphic explanatory variables, including carbon (C), nitrogen (N), phosphorus (P) and molybdenum (Mo) content, pH, water...
Tipo: Text
Palavras-chave: Free-living nitrogen fixation; Tropical forest; French Guiana; Nutrients; Phosphorus; Molybdenum.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00487/59901/63083.pdf

Nutrition phosphoree chez Chondrus crispus (Rhodophycees)
Provedor de dados: 5
Autores: Chopin, T; Floc'H, J; Bodeau, B; Penot, M.
Phosphorated nutrition of the red alga Chondrus crispus Stackh. is studied is two morphologically very dissimilar forms of the thallus. Phosphorus measurements, which were monthly carried out at different parts of the alga, showed first that the distribution of this element is not homogeneous along the thallus, and second that seasonal variations occur. It is suggested that the classical polymorphism of the species can be taken into account as concerns its physiology. Besides, from absorption and exsorption experiments which were performed with super(32)P as a tracer, it is shown that the high concentration factor of phosphorus in the alga as compared to the environmental seawater (up to 17.9 x 10 super(4)) can be explained as an effect of metabolic process.
Tipo: Text
Palavras-chave: Chondrus crispus; Algae; Distribution; Metabolism; Seasonal variations; Food absorption; Phosphorus; Plant nutrition.
Ano: 1983
URL: http://archimer.ifremer.fr/doc/1983/acte-1175.pdf

Rapid root assimilation of added phosphorus in a lowland tropical rainforest of French Guiana
Provedor de dados: 5
Autores: Van Langenhove, Leandro; Janssens, Ivan A.; Verryckt, Lore; Brechet, Laetitia; Hartley, Iain P.; Stahl, Clement; Courtois, Elodie; Urbina, Ifigenia; Grau, Oriol; Sardans, Jordi; Peguero, Guille; Gargallo-garriga, Albert; Peñuelas, Josep; Vicca, Sara.
Theory states that tree growth in lowland tropical forests on old, weathered soils is limited by low phosphorous (P) availability. However, evidence for P limitation from nutrient manipulation experiments remains unclear, which raises the question whether trees are taking up added P. In French Guianese lowland rainforest, we measured changes in nitrogen (N) and P availability before and up to two months after N and P addition. We measured in soils with intact root systems and soils excluding roots and mycorrhizal fungi with root exclusion cylinders. When the root system was excluded, P addition increased P availability to a much greater extent and for a longer time than where the roots remained undisturbed. N dynamics were unaffected by root...
Tipo: Text
Palavras-chave: Tropical forest; Phosphorus; Nitrogen; Fertilization; Root system; Plant root simulator probes.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00589/70161/68163.pdf

Etude du phosphore dans les sédiments ostréicoles du bassin des Chasses des Sables d'Olonne
Provedor de dados: 5
Autores: Feuillet, Michèle.
Tipo: Text
Palavras-chave: Biscay bay; Oyster culture zone; Marine sediment; Seawater; Phosphorus.
Ano: 1971
URL: http://archimer.ifremer.fr/doc/1971/publication-2240.pdf

High-rate algal pond treatment for water reuse in an integrated marine fish recirculating system: effect on water quality and sea bass growth
Provedor de dados: 5
Autores: Deviller, Genevieve; Aliaume, Catherine; Franco, Miguel; Casellas, Claude; Blancheton, Jean-paul.
A high-rate algae pond (HRAP) was tested as a second loop of water treatment in a recirculating fish rearing system to reduce water requirements and nutrient discharge levels. Three duplicated groups of sea bass (mean initial body weight 3 5 I I g) were reared under different system conditions (flow-through system, recirculating system and recirculating system with HRAP) for I year. Fish survival rate was higher in the system with HRAP, and their mean body weight was statistically higher (p&lt;0.05) during the month of maximal climatic conditions for algae photosynthesis. After 266 days of experiment, mean fish weight was significantly higher (p&lt;0.05) in the flow-through system than in the recirculating systems. Final fish weight was 15% higher in the...
Tipo: Text
Palavras-chave: Sustainability; Phosphorus; Nitrogen; Fish growth; Recirculation; High rate algae pond.
Ano: 2004
URL: http://archimer.ifremer.fr/doc/2004/publication-620.pdf

Biogeochemical aspects of bottom anoxia in a Mediterranean lagoon (Thau, France)
Provedor de dados: 5
Autores: Souchu, Philippe; Gasc, Anne; Collos, Y; Vaquer, A; Tournier, Henri; Bibent, B; Deslous-paoli, Jean-marc.
Physical and chemical characteristics (temperature, salinity, dissolved oxygen), nutrients [dissolved inorganic nitrogen (DIN), soluble reactive phosphorus (SRP) and silicate], dissolved organic nitrogen (DON) and phosphorus and particulate matter [particulate organic carbon (POC) and nitrogen (PON) and chlorophyll a] were measured at a station located in the deepest part of the Thau lagoon (8.5 m), France, during a 10 d period of bottom anoxia in summer 1994. The upper 8 cm of sediment were also analyzed for ammonium (NH(4)(+)) and SRP concentrations in the porewater. The study period was characterized by mean wind speed under 4 m s(-1) which induced an increase of surface temperature from 18 to 29 degrees C with the formation of a thermocline. The...
Tipo: Text
Palavras-chave: Anoxia; Nitrogen; Phosphorus; Eutrophication; Thau lagoon; Mediterranean Sea.
Ano: 1998
URL: http://archimer.ifremer.fr/doc/00070/18142/15694.pdf

Comparison of two methods for evaluating waste of a flow through trout farm
Provedor de dados: 5
Autores: Roque D'Orbcastel, Emmanuelle; Blancheton, Jean-paul; Boujard, Thierry; Aubin, Joel; Moutounet, Yves; Przybyla, Cyrille; Belaud, Alain.
European water legislation enforces increasingly restrictive measures with regards to reduction of water consumption and waste emission in order to minimise the potential environmental impact of the agro industry sector. Fish farms are particularly concerned, but legislation covering effluent discharge varies significantly from country to country. However, recommendations and directives from institutional, national or regional bodies suggest the enforcement of increasingly strict waste reduction measures and the development of waste treatment. Before treatment, it is necessary to evaluate waste production in terms of composition and quantity. The waste quantification methods used today for fish culture systems are either based on direct measurements of...
Tipo: Text
Palavras-chave: Phosphorus; Nitrogen; Suspended solids; Trout farm; Waste.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-6822.pdf

Modélisation des cycles de l'azote et du phosphore dans les sédiments d'une lagune soumise à une exploitation conchylicole
Provedor de dados: 5
Autores: Chapelle, Annie; Mesnage, Valérie; Mazouni, Nabila; Deslous-paoli, Jean-marc; Picot, Bernadette.
A simulation of nitrogen and phosphorus exchanges for the sediment-water interface is presented, The aim of the sttudy is to understand the dynamic behaviour of an eutrophie coastal lagoon (Thau, France), ln situ experiments were performed to estimate the different pools of nitrogen and phosphorus in the water column and in the sediment. The diffusive fluxes between them were also estimated. A numerical mode1, simulating nitrogen and phosphorus cycles, was developed and calibrated with data recorded .at two seasons (winter and summer). This study leads to the conclusion that is necessary to know the different pools of nitrogen and phosphorus in order to estimate which fraction is bioavailable and the rate of nutrient exchange between sediment and water. It...
Tipo: Text
Palavras-chave: Modèle; Phosphore; Azote; Sédiment; Ecosystème conchylicole; Modelling; Phosphorus; Nitrogen; Sediment; Shellfish ecosystem.
Ano: 1994
URL: http://archimer.ifremer.fr/doc/00039/15026/12360.pdf

Impact of Oyster Farming on Diagenetic Processes and the Phosphorus Cycle in Two Estuaries (Britanny, France)
Provedor de dados: 5
Autores: Andrieux, Francoise; Azandegbe, Afi; Caradec, Florian; Philippon, Xavier; Kerouel, Roger; Youenou, Agnes; Nicolas, Jean-louis.
This study aims to compare the impact of oyster cultures on diagenetic processes and the phosphorus cycle in the sediments of the Aber Benoît and the Rivière d’Auray, estuary of Brittany, France. Our results showed clear evidence of the seasonal impact of oyster cultures on sediment characteristics (grain size, organic matter parameters), and the phosphorus cycle, especially in the Aber Benoît. At this site, seasonal variations of sulfide and Fe concentrations in pore waters, as well as Fe-P concentrations in the solid-phase highlighted a shift from a system governed by iron reduction (Reference) to a system governed by sulphate reduction (Beneath Oyster). This could be partly explained by the increase in labile organic matter (ie, biodeposits) beneath...
Tipo: Text
Palavras-chave: Sediment; Phosphorus; Sulfide; Dissolved Fe/P ratios; Labile organic matter; Oyster cultures.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00209/32003/30441.pdf

Betaine lipid and neutral lipid production under nitrogen or phosphorus limitation in the marine microalga Tisochrysis lutea (Haptophyta)
Provedor de dados: 5
Autores: Huang, Bing; Marchand, Justine; Thiriet-rupert, Stanislas; Carrier, Gregory; Saint-jean, Bruno; Lukomska, Ewa; Moreau, Brigitte; Morant-manceau, Annick; Bougaran, Gael; Mimouni, Virginie.
Nitrogen (N) and phosphorus (P) limitations induce neutral lipid accumulation and membrane lipid remodeling in the domesticated oleaginous microalga Tisochrysis lutea. This study compared growth, photosynthetic activity, biochemical and transcriptional responses of T. lutea throughout batch cultures under N or P limitation compared with non-limiting nutrient condition (NP). The results show that, under N limitation, the breakdown and re-use of cellular N-containing compounds contributed to carbohydrates and further triacylglycerol (TAG) accumulation, where the accumulation of docosahexaenoic acid (DHA) in neutral lipids might mainly be derived from the recycling of membrane polar lipids. Conversely, P limitation did not hinder the photosynthetic capacity;...
Tipo: Text
Palavras-chave: Tisochrysis lutea; Phosphorus; Nitrogen; Lipid remodeling; Betaine lipid; Polyunsaturated fatty acid.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00492/60409/64776.pdf

Role of tidal pumping on nutrient cycling in a temperate lagoon (Arcachon Bay, France)
Provedor de dados: 5
Autores: Deborde, J; Anschutz, P; Auby, Isabelle; Gle, C; Commarieu, M; Maurer, Daniele; Lecroart, P; Abril, G.
The hypothesis of nutrient-rich pore-waters seeping at low tide through sediments to channel waters, which drain tidal flats during ebb, was evaluated in the Arcachon lagoon. The back of the bay is affected by freshwater inputs and underground freshwater discharges. The upper part of tidal flat consists of permeable sandy sediments, which are covered by a muddy sediment layer on the lower part. Permeable sediments outcrop in the bed of channel web. Surface water chemistry and early diagenesis processes in sediment were estimated by collecting channel web waters and cores on a tidal flat and in channels at different seasons and time scales. Waters from tidal creeks are under-oxygenated, and enriched in reduced solutes. Muddy sediments showed evidences of...
Tipo: Text
Palavras-chave: Arcachon Bay; Pore waters seeping; Nitrogen; Phosphorus; Organic matter mineralization; Tidal creek water; Tidal pump.
Ano: 2008
URL: https://archimer.ifremer.fr/doc/2008/publication-3927.pdf

Etude Sédimentaire Appliquée à l'Aquaculture pour Cinq Estrans de Bretagne Sud (Morbihan et Loire Atlantique).
Provedor de dados: 5
Autores: Lemoine, Gérard.
Within the national molluscan monitoring network, a sedimentary study was carried out on five experimental sites located in southern Brittany (i.e., from Etel to Pen-Bé rivers). The study aimed to specify sediment integrating characteristics with regards to hydrobiological variables. Moreover, interactions between sediment and water column characteristics were specified. It appears that this approach is likely unappropriate to characterize interdical rearing area productivity. However, this approach can support the site evaluation on a long term basis to sustain shellfish culture management. This would require additional study to assess sediment reactivity to abnormal events like drastic salinity decrease.
Tipo: Text
Palavras-chave: Sédiment; Ostréiculture; Estran; Phosphore; Eutrophisation; Sediment; Oyster culture; Intertidal area; Phosphorus; Eutrophication.
Ano: 1994
URL: http://archimer.ifremer.fr/doc/00102/21344/18967.pdf

Transformation de la phase solide à travers l’estuaire de la Loire en relation avec son environnement chimique et biologique
Provedor de dados: 5
Autores: Thibault De Chanvalon, Aubin.
Before reaching the ocean, riverine particles from the Loire watershed undergo important chemical transformations in the estuary. This study aims to identify and characterize main processes involving iron (and to a lesser extent Al, Mn, PO4 3- and rare earths elements). Suspended particulate matter data show that 15% of their iron is lost through the estuary. Reductive iron dissolution during deposition periods is likely to explain most of this loss. However, estuarine sediments are characterized by high spatial heterogeneity due to macrofaunal activities. To overcome this difficulty, new methodologies of high resolution and two-dimensional analyses and calculation of pore water, sediment and benthic meiofauna were developed. These developments enable to...
Tipo: Text
Palavras-chave: Estuaire; Fer; Phosphore; Nitrate; Foraminifère benthique; Diagenèse précoce; Loire; Bioturbation; Estuary; Iron; Phosphorus; Nitrate; Benthic foraminifera; Precocious diagenesis; Loire; Bioturbation.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00498/60932/64325.pdf

Mineral requirement of Penaeids
Provedor de dados: 5
Autores: Piedad-pascual, F.
Marine shrimps absorb minerals from their aquatic environment aside from the minerals that come from the food they eat. Thus, the dietary requirement of shrimps for certain minerals will depend on the amounts and availability of these minerals in the aquatic environment. Dietary sources for growth may be necessary due to losses during moltings.
Tipo: Text
Palavras-chave: Penaeus californiensis; Penaeus monodon; Penaeus japonicus; Penaeidae; Malacostraca; Juveniles; Moulting; Feed efficiency; Survival; Growth; Phosphorus; Calcium; Diets; Shrimp culture; Nutritional requirements.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/1989/acte-1454.pdf

Nitrogen and phosphorus limitations induce carbon partitioning and membrane lipid remodelling in the marine diatom Phaeodactylum tricornutum
Provedor de dados: 5
Autores: Huang, Bing; Marchand, Justine; Blanckaert, Vincent; Lukomska, Ewa; Ulmann, Lionel; Wielgosz-collin, Gaëtane; Rabesaotra, Vony; Moreau, Brigitte; Bougaran, Gael; Mimouni, Virginie; Morant-manceau, Annick.
Nitrogen (N) and phosphorus (P) limitations induce triacylglycerol (TAG) accumulation and membrane lipid remodelling in the marine diatom Phaeodactylum tricornutum. However, a clear understanding of the metabolic reorientation is still lacking. Carbon partitioning is of great interest because this microalga produces various highly valuable molecules such as lipids and polyunsaturated fatty acids. This study compared growth, photosynthetic activity, biochemical and transcriptional responses of P. tricornutum throughout batch culture under N or P limitation. The integrated results show that the photosynthetic intensity was greatly reduced under N or P limitation. Under N limitation, the degradation and re-use of cellular N-containing compounds contributed to...
Tipo: Text
Palavras-chave: Betaine lipid; Lipid remodelling; Microalga; Nitrogen; Phosphorus; Polyunsaturated fatty acid.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00491/60249/63861.pdf

Spatio-temporal dynamics of sedimentary phosphorus along two temperate eutrophic estuaries: A data-modelling approach
Provedor de dados: 5
Autores: Ait Ballagh, Fatima Ezzahra; Rabouille, Christophe; Andrieux Loyer, Francoise; Soetaert, Karline; Elkalay, Khalid; Khalil, Karima.
Sediments play an important role in dissolved inorganic phosphorus (DIP) recycling, which needs to be precisely quantified in eutrophic estuaries. A coupled field data and diagenetic modelling approach was used to study P dynamics in two estuaries (Elorn and Aulne, Brittany, France). An existing model (OMEXDIA) was extended with phosphorus (P) benthic cycle by adding dissolved inorganic phosphorus (DIP) and particulate P fractions (organic P, Fe-bound P and Ca-bound P). The model was fitted to pore water oxygen, nitrate, ammonium, oxygen demand units (reduced substances that were produced by the anoxic mineralization; Fe2+, Mn2+ and H2S; ODU), DIP, sediment organic P and C, Fe-bound P and Ca-bound P data from four seasons (February, May, July and October...
Tipo: Text
Palavras-chave: Phosphorus; Estuarine sediments; Eutrophication; Diagenetic modelling; Fe-bound P formation-release; Ca-bound P precipitation.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00598/71041/73089.pdf

Influence of oyster farming Crassostrea gigas on the phosphate cycle in an intertidal zone : the role of biodeposition
Provedor de dados: 5
Autores: Sornin, Jean-marc; Feuillet, Michelle; Heral, Maurice; Fardeau, Jean-claude.
Some aspects of the phosphorus cycle were studied in the estuarine bay of Marennes, Oléron, an area of intensive cultivation of Crassostrea gigas on the west coast of France. The annual cycle of dissolved phosphorus (mineral and organic) in the water column, interstitial water and at the sediment-water interface was followed, as well as the particulate phosphorus (total and assimilable) in sediments and in suspension. A comparison of the seasonal variations in these different forms of phosphorus in the suspended matters shows a deficit in "biodeposits" (sedimented faeces and pseudofaeces from Crassostrea gigas) equivalent to 20 mg.m -2.d -1 for assimilable phosphorus in July and September-October. This may be the result of consumption by the oysters, since...
Tipo: Text
Palavras-chave: Phosphore; Crassoslrea gigas; Biodéposition; Dilution isotopique; Marennes-Oléron; Phosphorus; Crassostrea gigas; Biodeposition Isotopic; Dilution; Marennes-Oléron.
Ano: 1986
URL: http://archimer.ifremer.fr/doc/1986/publication-2973.pdf

Carbon partitioning and lipid remodeling during phosphorus and nitrogen starvation in the marine microalga   Diacronema lutheri   (Haptophyta)
Provedor de dados: 5
Autores: Huang, Bing; Mimouni, Virginie; Lukomska, Ewa; Morant-manceau, Annick; Bougaran, Gael.
The domesticated marine microalga Diacronema lutheri is of great interest for producing various highly valuable molecules like lipids, particularly long‐chain polyunsaturated fatty acids (LC‐PUFA). In this study, we investigated the impact of phosphorus (P) and nitrogen (N) starvation on growth, carbon fixation (photosynthetic activity) and partitioning, and membrane lipid remodeling in this alga during batch culture. Our results show that the photosynthetic machinery was similarly affected by P and N stress. Under N starvation, we observed a much lower photosynthetic rate and biomass productivity. The degradation and re‐use of cellular N‐containing compounds contributed to triacylglycerol (TAG) accumulation. On the other hand, P‐starved cells maintained...
Tipo: Text
Palavras-chave: Carbon partitioning; Diacronema lutheri; Nitrogen; Phosphorus; Polyunsaturated fatty acid.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00619/73071/72204.pdf

Biogeochemical modelling in the Bay of Seine (France): an improvement by introducing phosphorus in nutrient cycles
Provedor de dados: 5
Autores: Guillaud, Jean-francois; Andrieux-loyer, Francoise; Menesguen, Alain.
As part of the French National Programme for Coastal Oceanography, this paper focuses on improvement of biogeochemical modelling in the: Bay of Seine (Eastern Channel), by introducing phosphorus in nutrient cycles. The Bay of Seine receives the Seine river, which exhibits very high nutrient concentrations, and this coastal zone constitutes a typical case of eutrophication in a river plume area. In terms of analyses, sequential extraction and analysis of sedimentary phosphorus were used in order, to measure various forms of particulate phosphorus in suspended matter and sediment (calcium-bound phosphate, Fe/Al-bound phosphate, exchangeable phosphate and organic phosphorus). In the modelling approach, the Bay is divided into 42 boxes and a two-layer,...
Tipo: Text
Palavras-chave: Bay of Seine; Phytoplankton; Phosphorus; River plume; Biological two layer box model.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/2000/publication-462.pdf

Addressing the measurement of particulate organic and inorganic phosphorus in estuarine and coastal waters
Provedor de dados: 5
Autores: Labry, Claire; Youenou, Agnes; Delmas, Daniel; Michelon, Pascale.
The speciation of particulate phosphorus (TPP) into inorganic (PIP) and organic phosphorus (POP), has been scarcely investigated in suspended particulate matter (SPM), contrary to numerous sediment studies. This work evaluates the actual capacity of methods for TPP, POP and PIP determination in SPM to measure efficiently and specifically each pool. Methods were tested on a range of plankton-associated organic and inorganic P compounds, on microalgal cultures and estuarine samples. Then results are specifically discussed reviewing P speciation in phytoplankton. For TPP analysis, the method of Solorzano and Sharp (1980) is recommended compared with that of Aspila et al. (1976), originally dedicated to sediment, as there is one step less, the protocol is more...
Tipo: Text
Palavras-chave: Phosphorus; Speciation; Waters; Phytoplankton; HTC; CWO.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00149/26046/26385.pdf

Nutrient export to an Eastern Atlantic coastal zone: first modeling and nitrogen mass balance
Provedor de dados: 5
Autores: Canton, Mathieu; Anschutz, Pierre; Coynel, Alexandra; Polsenaere, Pierre; Auby, Isabelle; Poirier, Dominique.
We have studied 15 catchments supplying freshwater to a French Atlantic coastal lagoon, where increase in nitrogen loads due to agriculture is supposed to have destabilized the ecosystem in the last decades. The catchment is a lowland composed of Pleistocene sands with an average slope of 0.25%. To study the nutrient export in relation to land-use surface waters were sampled bi-weekly between October 2006 and January 2009 and land-use was established by plane photographs and Geographic Information System (GIS). Cultivated pine forests represent more than 80% of the total surface and 7% of the catchment area has been deforested recently. Significant areas of some catchments are used for maize crop. Housing is confined to the coastal zone. Maize and forest...
Tipo: Text
Palavras-chave: Nitrogen; Phosphorus; River export; Land use; Coastal catchment; Arcachon Bay; Modeling; Mass balance.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00065/17615/15173.pdf

Disentangling Drought and Nutrient Effects on Soil Carbon Dioxide and Methane Fluxes in a Tropical Forest
Provedor de dados: 5
Autores: Bréchet, Laëtitia; Courtois, Elodie A.; Saint-germain, Thomas; Janssens, Ivan A.; Asensio, Dolores; Ramirez-rojas, Irene; Soong, Jennifer L.; Van Langenhove, Leandro; Verbruggen, Erik; Stahl, Clément.
Tropical soils are a major contributor to the balance of greenhouse gas (GHG) fluxes in the atmosphere. Models of tropical GHG fluxes predict that both the frequency of drought events and changes in atmospheric deposition of nitrogen (N) will significantly affect dynamics of soil carbon dioxide (CO2) and methane (CH4) production and consumption. In this study, we examined the combined effect of a reduction in precipitation and an increase in nutrient availability on soil CO2 and CH4 fluxes in a primary French Guiana tropical forest. Drought conditions were simulated by intercepting precipitation falling through the forest canopy with tarpaulin roofs. Nutrient availability was manipulated through application of granular N and/or phosphorus (P) fertilizer to...
Tipo: Text
Palavras-chave: Carbon dioxide; Drought; Fertilization; Methane; Nitrogen; Phosphorus; Soil GHG fluxes; Tropical forest.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00595/70694/68903.pdf

Atmospheric deposition of elements and its relevance for nutrient budgets of tropical forests
Provedor de dados: 5
Autores: Van Langenhove, Leandro; Verryckt, Lore T.; Bréchet, Laëtitia; Courtois, Elodie A.; Stahl, Clement; Hofhansl, Florian; Bauters, Marijn; Sardans, Jordi; Boeckx, Pascal; Fransen, Erik; Peñuelas, Josep; Janssens, Ivan A.
Atmospheric deposition is an important component of the nutrient cycles of terrestrial ecosystems, but field measurements are especially scarce in tropical regions. In this study we analysed 15 months of precipitation chemistry collected in an old growth tropical forest located in French Guiana. We measured nutrient inputs via bulk precipitation and throughfall and used the canopy budget model to estimate nutrient fluxes via canopy exchange and dry deposition. Based on this method we quantified net fluxes of macronutrients and compared their contribution to internal cycling rates via litterfall. Our results suggest that while atmospheric deposition of nitrogen was relatively high (13 kg ha−1 year−1), and mainly in organic forms, the N inputs via litterfall...
Tipo: Text
Palavras-chave: Throughfall; Litterfall; Nutrient cycling; Nitrogen; Phosphorus; Potassium.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00629/74123/73572.pdf

Les elements nutritifs en baie de Seine
Provedor de dados: 5
Autores: Aminot, Alain; Kerouel, Roger; Mauvais, J.
Seasonal variations of dissolved nutrient concentrations are reported in this paper. Impacts of freshwater are investigated by the study of dilution, nutrient quantity, and relation with phytoplanktonic growth.
Tipo: Text
Palavras-chave: Silicon; Phosphorus; Nitrogen; Seasonal variations; Dilution; Primary production; Eutrophic waters; Phytoplankton; River discharge; Coastal zone; Nutrients (mineral).
Ano: 1985
URL: http://archimer.ifremer.fr/doc/1985/acte-1295.pdf

Relations entre les eaux interstitielles des fonds sedimentaires ostreicoles et le milieu hydrobiologique. Le Bassin des Chasses des Sables d'Olonne
Provedor de dados: 5
Autores: Feuillet, Michèle.
Extensive data have been obtained on oyster-bearing sediments and interstitial and overlying waters in the Bassin des Chasses, les Sables d'Olonne, which will enable a scale of suitability of waters for oyster-culture to be compiled. The studies concerned: I. Hydrology, including fresh water inflow: II. Salinity; alkaline reserve; Na, K, Ca and Mg levels: III. Circulation and distribution of nitrogenous substances: IV. The N sub(2) cycle: V.P. Nitrogenous and phosphorus nutrients are regenerated continuously in the sediments and replenish the free water.
Tipo: Text
Palavras-chave: Bisacy bay; Organic matter; Nitrogen concentration; Phosphorus; Marine sediment; Hydrobiology; Oyster culture zone.
Ano: 1971
URL: http://archimer.ifremer.fr/doc/1971/publication-2239.pdf

Response of diatom and dinoflagellate lifeforms to reduced phosphorus loading: a case study in the Thau lagoon, France
Provedor de dados: 5
Autores: Gowen, R. J.; Collos, Y.; Tett, P.; Scherer, C.; Bec, B.; Abadie, Eric; Allen, M.; O'Brien, T.
The basin of Thau in southern France is a shallow, weakly flushed lagoon which is an important location for oyster cultivation. Phytoplankton analyses were carried out in 1975-1976 and then (almost) continuously since 1987. We report an investigation of 'the balance of organisms' in phytoplankton in relation to reductions in phosphorus loading, using two new tools based on phytoplankton lifeforms: the Plankton Index for Phytoplankton (PIp); Euclidean distance in state space. Our results show the utility of the tools for analysing changes in the ‘balance of organisms’ at the level of functional groups (in our study diatoms and dinoflagellates), but also illustrate the difficulties in demonstrating the reversal of human impacts resulting from eutrophication....
Tipo: Text
Palavras-chave: Eutrophication; Thau lagoon; Phosphorus; Lifeform; State-space; Euclidean distance.
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00257/36817/35449.pdf

Voluntary feed intake, nitrogen and phosphorus losses in rainbow trout (Oncorhynchus mykiss) fed increasing dietary levels of soy protein concentrate
Provedor de dados: 5
Autores: Medale, Francoise; Boujard, Thierry; Vallee, Frédéric; Blanc, Denise; Mambrini, Muriel; Roem, Arjen; Kaushik, Sadasivam.
High energy extruded diets were formulated to contain the same level of protein supplied either by soy protein concentrate (SPC) or fish meal. Three experiments were performed in order to measure voluntary feed intake and feed waste, faecal losses and soluble losses of nitrogen and phosphorus in rainbow trout (average body weight: 100 g). Voluntary feed intake and growth performance of fish fed with demand feeders were not different when diets contained 0, 50 or 75 % SPC instead of fish meal. Total replacement of fish meal by SPC led to a significant decrease in feed intake and resulted in poor growth. This was partly due to methionine deficiency in the SPC based diet. With the addition of crystalline DL-methionine in the diets, an improvement of feed...
Tipo: Text
Palavras-chave: Digestibilité; Excrétion; Azote; Phosphore; Protéine de soja; Ingestion volontaire; Truite arc-en-ciel; Digestibility; Excretion; Nitrogen; Phosphorus; Soy protein; Voluntary feed intake; Rainbow trout.
Ano: 1998
URL: https://archimer.ifremer.fr/doc/1998/publication-871.pdf

Growth and phosphorus uptake by the toxic dinoflagellate Alexandrium catenella (dinophyceae) in response to phosphate limitation
Provedor de dados: 5
Autores: Jauzein, Cecile; Labry, Claire; Youenou, Agnes; Quere, Julien; Delmas, Daniel; Collos, Yves.
Alexandrium catenella (Whedon et Kof.) Balech has exhibited seasonal recurrent blooms in the Thau lagoon (South of France) since first reported in 1995. Its appearance followed a strong decrease (90%) in phosphate (PO(4)3-) concentrations in this environment over the 1970-1995 period. To determine if this dinoflagellate species has a competitive advantage in PO(4)3--limited conditions in terms of nutrient acquisition, semicontinuous cultures were carried out to characterize phosphorus (P) uptake by A. catenella cells along a P-limitation gradient using different dilution rates (DRs). Use of both inorganic and organic P was investigated from measurements of 33PO(4)3- uptake and alkaline phosphatase activity (APA), respectively. P status was estimated from...
Tipo: Text
Palavras-chave: Alexandrium catenella; Alkaline phosphatase; Limitation; Phosphorus; Semicontinuous cultures.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00015/12641/9570.pdf

Effect of Storage Period and Temperature on Some Properties of Potato Starch
Provedor de dados: 19
Autores: サビニアーノ, ナオミ S.; 石橋, 憲一; 弘中, 和憲; 山本, 和夫; SABINIANO, Naomy S.; Ishibashi, Ken-ichi; Hironaka, Kazunori; Yamamoto, Kazuo.
The effect of temperature on the properties of potato starch during storage at 1, 5 and 10 centigrade for 6 months were determined. The Brabender peak viscosity, final viscosity at 92.5 centigrade breakdown, swelling power, solubility and phosphorus content decreased while initial pasting temperature, temperature at peak viscosity and blue value of the starches increased during storage. Phosphorus content was highly correlated with Brabender peak viscosity and breakdown(r =0.92 and 0.82, respectively, p&lt;0.01). Higher rates of decrease in viscosity and phosphorus content occurred at 1 and 10 centigrade during storage....
Palavras-chave: Potato storage; Potato starch; Brabender viscosity; Swelling power; Solubility; Phosphorus; Blue value; 馬鈴薯貯蔵; 馬鈴薯デンプン; ブラベンダー粘度; 膨潤度; 溶解度; リン含量; 青価.
Ano: 1994
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/1862

Nitrogen and phosphorus species of Lake Burullus Water (Egypt)
Provedor de dados: 20
Autores: Okbah, M.A.
Water samples collected from Lake Burullus were analyzed to investigate temporal and spatial variations of phosphorus and nitrogen species during the period from January to October 2003. The concentrations of dissolved inorganic nitrogen (DIN), dissolved organic nitrogen (DON), particulate nitrogen (PN) and total nitrogen (TN) were in the ranges of 4.10-107.51mole l-1 ; 7.43-170.10mole l-1; 9.33-209.4mole l-1 and 51.40-259.0 mole l-1 respectively. DIN, DON and PN species represent 19%, 34% and 47% of the total nitrogen content, respectively. Significant variations for the concentrations of the phosphorus forms have been found in this study. Concentrations of reactive phosphate (PO4), dissolved organic phosphorus (DOP), particulate phosphorus (PP) and...
Tipo: Journal Contribution
Palavras-chave: Water samples; Water content; Nitrogen; Nutrients; Phosphorus; Http://aims.fao.org/aos/agrovoc/c_5192; Http://aims.fao.org/aos/agrovoc/c_5274; Http://aims.fao.org/aos/agrovoc/c_5804.
Ano: 2005
URL: http://hdl.handle.net/1834/1263

Capacité des moules dans la réduction des teneurs en nutriments et la charge bactérienne dans les effluents piscicoles
Provedor de dados: 20
Autores: Romdhane, M.S.; Chebil Ajjabi, L.; El Abed, O.
L’effluent des élevages de poissons renferme des concentrations plus élevées en nutriments dissous et en particules en suspension que celles présentes dans l’eau entrante. Cet état entraine par conséquent, des problèmes d’ordre environnementaux affectant les eaux côtières dues à l’eutrophisation et l’augmentation de la turbidité. Afin d’améliorer la qualité de l’effluent avant son déversement dans le milieu naturel, l’utilisation des bivalves comme filtre biologique est une alternative adéquate. Cette étude analyse la capacité de la moule Mytilus galloprovincialis de réduire les teneurs en sels nutritifs et la charge bactérienne dans les effluents de loups Dicentrarchus labrax en élevage. L’effluent issu des bassins de grossissement est pompé directement...
Tipo: Journal Contribution
Palavras-chave: Aquaculture effluents; Bacteria; Biofilters; Chlorophylls; Culture effects; Density; Effluents; Filtration; Fish; Mussel fisheries; Nitrogen; Nutrients (mineral); Phosphorus; Suspended particulate matter; Wastewater treatment; Water quality; Mytilus galloprovincialis; Wastewater treatment; Mussels; Nutrients; Http://aims.fao.org/aos/agrovoc/c_31155; Http://aims.fao.org/aos/agrovoc/c_25312; Http://aims.fao.org/aos/agrovoc/c_5010; Http://aims.fao.org/aos/agrovoc/c_5274.
Ano: 2008
URL: http://hdl.handle.net/1834/4154

Compuestos de nitrógeno y fósforo en las aguas superficiales de tres zonas de la plataforma marina cubana
Provedor de dados: 20
Autores: Montalvo, J.F.; Perigó Arnaud, E.; Martínez, M.; García, I.; Esponda, S.C.; Cesar, M.E.; García, R.; López, D.; García, N.; Blanco, M.
Entre los años 1990 y 1991 se estudió el Golfo de Guacanayabo, desde 1998 hasta 2003 se evaluó el Golfo de Batabanó y el Archipiélago Sabana Camagüey fue investigado en la etapa 2001-2005, con el objetivo de evaluar los contenidos de nitrógeno y fósforo en estas tres regiones de la plataforma marina cubana y establecer las relaciones existentes entre ambos nutrientes. Los golfos de Guacanayabo y Batabanó poseen un mayor potencial de nitrógeno y fósforo que el ecosistema costero Sabana-Camagüey, debido al menor desarrollo de la red fluvial en este ecosistema, aunque en las tres regiones las concentraciones de estos compuestos están bajo una acentuada influencia antropogénica. La relación nitrógeno total-fósforo total N.T./P.T., mostró una tendencia a...
Tipo: Journal Contribution
Palavras-chave: Eutrophication; Nitrogen; Phosphorus; Man-induced effects; Archipelagoes; Eutrophication; Nitrogen; Phosphorus; Http://aims.fao.org/aos/agrovoc/c_2734; Http://aims.fao.org/aos/agrovoc/c_5192; Http://aims.fao.org/aos/agrovoc/c_5804.
Ano: 2010
URL: http://hdl.handle.net/1834/3667

Compuestos de nitrógeno y fósforo en agua de algunas bahías del Archipiélago Sabana-Camagüey, Cuba.
Provedor de dados: 20
Autores: Montalvo, J.F.; García, I.; Loza, S.; Perigó, E.; Esponda, S.C.; Sánchez, M.; Barrier, A.
El Archipiélago Sabana – Camagüey es una de las regiones más estudiadas de la plataforma marina cubana. Entre los años 2001-2005 se evaluaron los contenidos de nitratos más nitrito, amonio, nitrógeno total, fósforo inorgánico y fósforo total, y se establecieron las relaciones nitrógeno total inorgánico &amp; fósforo inorgánico N/P y nitrógeno total &amp; fósforo total NT/PT, en las bahías de Cárdenas, Santa Clara Oeste, Puerto de Sagua la Grande, San Juan de los Remedios, Buenavista, Los Perros, Jigüey y La Gloria. El amonio fue la principal fuente de nitrógeno inorgánico y los contenidos de nitrógeno orgánico evidenciaron el predominio de los procesos de biosíntesis. Las relaciones N/P y NT/PT fueron superiores a 16:1 en la mayoría de las bahías...
Tipo: Preprint
Palavras-chave: Ammonium compounds; Nitrogen; Phosphorus; Bays; Nitrogen; Phosphorus; Ammonium compounds; Http://aims.fao.org/aos/agrovoc/c_5192; Http://aims.fao.org/aos/agrovoc/c_5804; Http://aims.fao.org/aos/agrovoc/c_351.
Ano: 2010
URL: http://hdl.handle.net/1834/3593

Essai d'évaluation de la qualité des eaux de ruissellement du bassin versant de la lagune de Bizerte
Provedor de dados: 20
Autores: Hammami, J.; Brahim, M.; Gueddari, M.
:تقع بحيرة بنزرت في الشمال التونسي وتغذيها عدة أودية تنبع من حوض يمتد على مساحة شاسعة. وتمثل التقلبات المناخية والأنشطة الإقتصادية المتزايدة في السنوات الأخيرة أهم العوامل المؤثرة في هذا الحوض وفي السيول التي تنبع منه في اتجاه البحيرة.  لقد قمنا في شهر فيفري في سنة 2003 باقتـاء عينات من الماء مـن 15 مصـب لتحليلـها ( درجة الحرارة، درجة الحموضة، نسبة الأكسجين، الكلوروفيل والمواد العضوية والمعدنية الأزوتية والفسفورية) قصد دراسة هذه الظاهرة.  وبينت النتائج التي تم الحصول عليها بأن مياه روافد بحيرة بنزرت تتميز عموما بنسبة عالية للأكسجين وبدرجة حموضة عادية إلى مرتفعة نوعا ما. لكن مياه مصب وادي المرازيق وقنيش والذين يقعان بالتوالي في الشمال الغربي والجنوب الشرقي للبحيرة محملا بأكثر نسبة من المواد الأزوتية والفسفورية. تظهر هذه النتيجة واضحة في التحاليل الإحصائية...
Tipo: Journal Contribution
Palavras-chave: Runoff; Anthropogenic factors; Chlorophylls; Physical properties; Water quality; Chemical properties; Nitrogen; Phosphorus; Runoff; Water quality; Chemical properties; Nitrogen; Phosphorus; Anthropogenic factors; Chlorophylls; Physical properties; Http://aims.fao.org/aos/agrovoc/c_35388; Http://aims.fao.org/aos/agrovoc/c_16061; Http://aims.fao.org/aos/agrovoc/c_9754; Http://aims.fao.org/aos/agrovoc/c_5192; Http://aims.fao.org/aos/agrovoc/c_5804; Http://aims.fao.org/aos/agrovoc/c_34996; Http://aims.fao.org/aos/agrovoc/c_1577; Http://aims.fao.org/aos/agrovoc/c_13328.
Ano: 2005
URL: http://hdl.handle.net/1834/1533

Concentraciones de nutrientes y eutrofización en arrecifes coralinos de los archipiélagos Los Canarreos y Sabana-Camagüey
Provedor de dados: 20
Autores: Montalvo, J.F.; Perigó, E.
Coral reefs are very sensitive to the increment in nitrogen concentrations and phosphorus, since these compounds propitiate the macroalgae growth, resulting in the degradation of coral reefs. With the purpose of assessing the degree of nutriphication of the coral reefs in Los Canarreos Archipelago, located in the periphery of the Gulf of Batabanó, and those located in the outer area of Sabana-Camagüey Archipelago (SCA), three samplings were executed in the reefs of Los Canarreos Archipelago (August 1999, March 2000 and August 2000). In SCA, samplings were done in May 2002 and August 2003. The parameters evaluated were nitrates + nitrite, ammonium, total nitrogen, inorganic phosphorus and total phosphorus. The nutrient contents in the reefs located in the...
Tipo: Proceedings Paper
Palavras-chave: Coral reefs; Eutrophication; Nutrients (mineral); Nitrogen; Phosphorus; Coral reefs; Eutrophication; Nitrogen; Phosphorus; Http://aims.fao.org/aos/agrovoc/c_1880; Http://aims.fao.org/aos/agrovoc/c_2734; Http://aims.fao.org/aos/agrovoc/c_5192; Http://aims.fao.org/aos/agrovoc/c_5804.
Ano: 2006
URL: http://hdl.handle.net/1834/2084

Caractérisation hivernale de la lagune de Bizerte
Provedor de dados: 20
Autores: Bejaoui, B.; Ben Charada, R.; Moussa, M.; Ben Hamadou, R.; Harzallah, A.; Chapelle, A.
Ce travail porte sur la caractérisation hivernale de la lagune de Bizerte en se basant sur une campagne de mesures effectuée en janvier 2004. Cette campagne a porté sur 17 stations réparties sur toute la lagune ainsi qu’une station marine de référence. Chaque échantillon a fait l’objet de mesures in-situ (Température, Salinité, Conductivité, Transparence, Acidité et Oxygène dissous) et des analyses au laboratoire (NO3, NO2, NT, PO4, Chlorophylle-a, Phéopigment et MES). Cette étude a montré que la distribution spatiale des paramètres est fortement liée aux apports fluviaux. Contrairement au phosphore minéral, la teneur en azote total montre une variation spatiale importante. L’analyse de la distribution spatiale des nutriments d’une part et de la...
Tipo: Journal Contribution
Palavras-chave: Geographical distribution; Hydrobiology; Nitrogen; Nutrients (mineral); Phosphorus; Phytoplankton; Geographical distribution; Nitrogen; Phosphorus; Phytoplankton; Hydrobiology; Http://aims.fao.org/aos/agrovoc/c_5083; Http://aims.fao.org/aos/agrovoc/c_5192; Http://aims.fao.org/aos/agrovoc/c_5804; Http://aims.fao.org/aos/agrovoc/c_13344; Http://aims.fao.org/aos/agrovoc/c_3718.
Ano: 2005
URL: http://hdl.handle.net/1834/3748

Essai d’évaluation de la qualite des eaux de ruissellement du bassin versant de la lagune de Bizerte
Provedor de dados: 20
Autores: Hammami, J.; Brahim, M.; Gueddari, M.
La lagune de Bizerte, située en Tunisie nord-orientale, constitue un bassin récepteur d’un réseau hydrographique bien développé. Afin d’apprécier l’impact des facteurs naturels et anthropiques sur les eaux de ruissellement du bassin versant de cette lagune, une campagne de prélèvement d’eau a été effectuée en février 2003 (période de crue) au niveau de la partie aval de quinze cours d’eau, à raison d’un échantillon par cours d’eau. Les échantillons d’eau prélevés ont fait l’objet de mesure in situ des variables physico-chimiques (température, pH et O2 dissous) et d’analyses au laboratoire de la chlorophylle a et des différentes formes organiques et inorganiques dissoutes de l’azote et du phosphore. Les résultats obtenus ont montré que les eaux de...
Tipo: Journal Contribution
Palavras-chave: Anthropogenic factors; Chemical properties; Chlorophylls; Nitrogen; Phosphorus; Physical properties; Pollution monitoring; Runoff; Water quality; Chemical properties; Nitrogen; Phosphorus; Runoff; Water quality; Chlorophylls; Anthropogenic factors; Physical properties; Http://aims.fao.org/aos/agrovoc/c_9754; Http://aims.fao.org/aos/agrovoc/c_5192; Http://aims.fao.org/aos/agrovoc/c_5804; Http://aims.fao.org/aos/agrovoc/c_35388; Http://aims.fao.org/aos/agrovoc/c_16061; Http://aims.fao.org/aos/agrovoc/c_1577; Http://aims.fao.org/aos/agrovoc/c_34996; Http://aims.fao.org/aos/agrovoc/c_13328.
Ano: 2005
URL: http://hdl.handle.net/1834/3747

Determination of P, Ca, Zn, Cd and Pb concentrations in muscle, gills, liver, gonads and skeleton of two natural populations of &lt;Atherina lagunae&gt; in north lake of Tunis (Tunisia)
Provedor de dados: 20
Autores: Ayed, N.; Faure, E.; Quignard, J.P.; Trabelsi, M.
In this study, zinc (Zn), cadmium (Cd), lead (Pb), phosphorus (P) and calcium (Ca) concentrations in muscle, gills, liver, gonads and skeleton of two naturals populations of sand smelt Atherina lagunae (Teleostean, Atherinidae) normal and deformed, as well as bioaccumulation of these elements from the water and the sediment in the North Tunis Lake were investigated. The analysis of calcium was performed with flame atomic absorption spectrometry. The average concentrations of Ca in the different tissues analyzed show higher values in healthy atherines except in gonads where the average concentration of Ca in deformed atherines significantlyexceeds that in normal atherines (p &lt;0.05) and the Ca spine concentrations where the similar in the two populations....
Tipo: Journal Contribution
Palavras-chave: Heavy metals; Calcium; Phosphorus.
Ano: 2013
URL: http://hdl.handle.net/1834/5906

Capacité des moules dans la réduction des teneurs en nutriments et la charge bactérienne dans les effluents piscicoles
Provedor de dados: 20
Autores: Chebil Ajjabi, L.; Romdhane, M.S.; El Abed, A.
L’effluent des élevages de poissons renferme des concentrations plus élevées en nutriments dissous et en particules en suspension que celles présentes dans l’eau entrante. Cet état entraine par conséquent, des problèmes d’ordre environnementaux affectant les eaux côtières dues à l’eutrophisation et l’augmentation de la turbidité. Afin d’améliorer la qualité de l’effluent avant son déversement dans le milieu naturel, l’utilisation des bivalves comme filtre biologique est une alternative adéquate. Cette étude analyse la capacité de la moule Mytilus galloprovincialis de réduire les teneurs en sels nutritifs et la charge bactérienne dans les effluents de loups Dicentrarchus labrax en élevage. L’effluent issu des bassins de grossissement est pompé directement...
Tipo: Journal Contribution
Palavras-chave: Aquaculture effluents; Bacteria; Biofilters; Chlorophylls; Chlorophylls; Culture effects; Density; Effluents; Filtration; Fish; Mussel culture; Nitrogen; Nutrients (mineral); Phosphorus; Suspended particulate matter; Wastewater recycling; Wastewater treatment; Water quality; Fish; Nitrogen; Phosphorus; Water quality; Mussels; Nutrients; Bacteria; Chlorophylls; Density; Effluents; Filtration; Wastewater treatment.
Ano: 2008
URL: http://hdl.handle.net/1834/3756

Sintomas de deficiência nutricional de macronutrientes em mudas de Khaya ivorensis cultivadas em solução nutritiva
Provedor de dados: 190
Autores: Corcioli, Graciella; Borges, Jácomo Divino; de Jesus, Roberta Paula.
O mogno africano (Khaya ivorensis) é uma essência florestal de alto valor no comércio internacional e de grande potencial para substituir o mogno brasileiro (Swietenia macrophylla). Atualmente, pouco se conhece a respeito das exigências nutricionais do mogno africano. Assim, o presente trabalho teve por objetivo induzir sintomas visuais de deficiência de macronutrientes (nitrogênio, fósforo e potássio) em mudas de mogno africano. Para isso, realizou-se um experimento com solução nutritiva, com os tratamentos: T1-Solução completa; T2-com omissão de N; T3-com omissão de P; T4-com omissão de K e T5-Água deionizada. Os sintomas de deficiências de macronutrientes em mudas de mogno africano foram evidentes, comprometendo o desenvolvimento das mudas.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Nutrição Mineral; Recursos Florestais Mogno africano; Nitrogênio; Fósforo; Potássio African mahogany; Nitrogen; Phosphorus; Potassium.
Ano: 2014
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/641

Variations on the nutritional status of eucalypt as influenced by the genetic material and age of tree
Provedor de dados: 86
Autores: Wadt,Paulo Guilherme Salvador; Novais,Roberto Ferreira de; Alvarez,Victor Hugo; Barros,Nairam Félix de; Dias,Luiz Eduardo.
The Diagnosis and Recommendation System (DRIS) was applied to eucalypt trees (hybrids of Eucalyptus grandis x E. urophylla) with different ages and growing under different environmental conditions for three different clones. The basic data were obtained from 1,986 trees of commercial stands cultivated in the states of Espírito Santo and south Bahia, Brazil. The DRIS indices were calculated using the Beaufils' Range formula and grouped according to the Nutrient Application Potential Response method. The objective of this paper was to evaluate the N, P and Ca status in eucalypt trees, regarding the tree ages and genetic materials. The DRIS indices discriminated differences in the nutritional status of the trees, both in relation to age and the genetic...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: DRIS; Coefficient of nutrient utilization; Nitrogen; Phosphorus; Calcium; Eucalyptus grandis; Eucalyptus urophylla.
Ano: 1999
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X1999001000005

Chemical composition of cactus pear cladodes under different fertilization and harvesting managements
Provedor de dados: 86
Autores: Gomes,Gil Mario Ferreira; Cândido,Magno José Duarte; Lopes,Marcos Neves; Maranhão,Theyson Duarte; Andrade,Dhones Rodrigues de; Costa,Jander Fabrício Martins; Silveira,Walisson Marques; Neiva,José Neuman Miranda.
Abstract: The objective of this work was to evaluate the effects of combined phosphorus and nitrogen fertilization and of harvesting frequency on the chemical composition of 'Gigante' cactus pear (Opuntia ficus-indica) cladodes. The experiment was carried out in two municipalities, Quixadá and Tejuçuoca, in the state of Ceará, Brazil. Fertilization with nitrogen (urea) and phosphorus (single superphosphate) was done with nine doses, respectively: 10 and 70, 70 and 10, 70 and 70, 70 and 130, 100 and 100, 130 and 70, 130 and 130, 130 and 190, and 190 and 130 kg ha-1 per year, besides 100 kg ha-1 N and P2O5 per year as the control. The harvesting frequencies evaluated were annual and biannual. A randomized complete block design was adopted, in split plot,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Opuntia ficus-indica; Harvesting frequency; Nitrogen; Phosphorus.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2018000200221

Analysis of variance of primary data on plant growth analysis
Provedor de dados: 86
Autores: Araújo,Adelson Paulo.
Plant growth analysis presents difficulties related to statistical comparison of growth rates, and the analysis of variance of primary data could guide the interpretation of results. The objective of this work was to evaluate the analysis of variance of data from distinct harvests of an experiment, focusing especially on the homogeneity of variances and the choice of an adequate ANOVA model. Data from five experiments covering different crops and growth conditions were used. From the total number of variables, 19% were originally homoscedastic, 60% became homoscedastic after logarithmic transformation, and 21% remained heteroscedastic after transformation. Data transformation did not affect the F test in one experiment, whereas in the other experiments...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: ANOVA model; Statistic; Phosphorus; Common bean; Rice.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2003000100001

Nitrogen deposition influences the response of Potentilla tanacetifolia to phosphorus addition
Provedor de dados: 85
Autores: Yang,G; Zhang,Z; Zhang,G; Zhang,H; Han,X; Busso,CA.
Phosphorus is an essential macronutrient for all living plants and plant production. Simultaneously, atmospheric nitrogen deposition also affects plant productivity at a global scale. However, few studies have investigated how plants respond to P addition while simultaneously considering N deposition. We investigated plant biomass, nutrient status and stoichiometric ratios on Potentilla tanacetifolia in response to P fertilization under contrasting N addition rates in a typical meadow steppe in Inner Mongol ia, China. Aboveground biomass of P. tanacetifolia increased under increasing levels of P fertilization under conditions of N addition. However, there was no significant change in biomass when only phosphorus was added. Plant leaf and stem P...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Nitrogen; Phosphorus; N: P ratio; Plant organs.
Ano: 2016
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572016000100014

Nitrogen metabolism in roots and leaves of green bean plants exposed to different phosphorus doses
Provedor de dados: 85
Autores: Sánchez,E.; Ávila-Quezada,G.; Gardea,A.A.; Muñoz,E.; Ruiz,J.M.; Romero,L.
The objective of this work was to determine the effect of different P doses on nitrogen assimilation in roots and leaves of green beans plants (Phaseolus vulgaris L. cv. Strike). Phosphorus was applied in the nutrient solution as H3PO4, at the nutrient doses of: P1 = 0.40 mM; P2 = 0.80 mM; P3 = 1.60 mM; P4 = 3.20 mM; P5 = 4.80 mM, and P6 = 6.40 mM P. Our results indicate that both P toxicity and deficiency gave similar responses to N assimilation. Phosphorus and NO3 - interacted on the absorption and translocation processes affecting N assimilation. The deficiency (P1), and toxicity (P6) treatments, diminished root absorption of NO3- in 15% and 36%, respectively, respect to the optimum dose (P3), thus reducing nutrient availability for assimilation. This...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Phaseolus vulgaris L.; Nitrogen metabolism; Green bean; Phosphorus; Deficiency; Toxicity.
Ano: 2009
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572009000100003

How much can be gained by optimizing nutrient abetment spatially – Cost – efficiency comparison of non – point arable loads from different Finnish watersheds
Provedor de dados: 31
Autores: Helin,   Janne; Tattari,   Sirkka.
Targeting has become the buzz word in the national agri-environmental policy reform in Finland. It is generally accepted that more environmental benefits could be reaped by implementing environmental protection measures where they have the biggest positive impact. However, considering one of the main environmental problems in Finland resulting from agriculture, eutrophication, the identification of first-best policy or even the biggest contributors among the diffuse nutrient sources remains as a considerable challenge. The model developed in this study aims to demonstrate how the agricultural nutrient load potential can be calculated in a way which supports the identifying of cost-efficient abatement policies. We use metamodeling of dynamic nutrient load...
Tipo: Conference Paper or Presentation
Palavras-chave: Nutrient abatement; Nitrogen; Phosphorus; Non-linear optimization; GIS; Agricultural and Food Policy; Crop Production/Industries; Environmental Economics and Policy; Farm Management; Food Consumption/Nutrition/Food Safety; Land Economics/Use; Productivity Analysis.
Ano: 2010
URL: http://purl.umn.edu/109381

Assessing the Distributional Impacts of Transferable Pollution Permits: The Case of Phosphorus Pollution Management at a River Basin Scale
Provedor de dados: 31
Autores: Kampas,   Athanasios; Mamalis,   Spyridon.
Although the initial allocation of pollution permits is neutral in terms of efficiency, it does have a significant impact on distributive equity. In this paper, we examine the two main categories of permit allocation rules, the distributive and the reductive, for controlling phosphorus pollution in a small catchment in South West England. Based on the premise that the regulatory choice compromises efficiency and equity, the main result of this paper is that an allocation of permits in proportion to the intensity of environmental preferences is a “win-win” choice. The reason is that it simultaneously achieves two goals. First, it is efficient (or cost-effective) since a permit system achieves a prespecified target at a minimum abatement cost, while second,...
Tipo: Journal Article
Palavras-chave: Pollution permits; Phosphorus; Nutrient management; Export coefficient model; Water quality; Distributive justice; Income inequality; Atkinson Index; Environmental Economics and Policy.
Ano: 2006
URL: http://purl.umn.edu/44115

Precision Feeding in Dairy Ration Cost Minimization Under Producer's Risk Management
Provedor de dados: 31
Autores: Salim,   Juma K.; Dillon,   Carl R.
The biophysical simulation data from Cornell Net Carbohydrate and Protein System were used in non-linear programming model for least cost ration incorporating ingredient nutrient and price variations. Precision feeding practice indicated to have lower mean cost ration than whole herd feeding in terms of ration cost.
Tipo: Conference Paper or Presentation
Palavras-chave: Non-linear programming; Nutrient variation; Price variation; Precision feeding; Environmental pollution; Phosphorus; Nitrogen; Mean cost ration; Whole herd feeding; Livestock Production/Industries; Risk and Uncertainty.
Ano: 2007
URL: http://purl.umn.edu/34925

Sulphur test KCl-40 and growth of the Australian canola industry
Provedor de dados: 31
Two Australian Centre for International Agricultural Research (ACIAR) projects in the mid-1980s (Projects 8328 and 8804) funded research at the University of New England to help better understand and improve phosphorus and sulfur management in tropical agricultural systems. As tropical agriculture expands into more marginal land and production systems intensify, the demands for soil phosphorus and sulfur increase.  Major outcomes of the research were a better understanding of the nutrient dynamics in South-East Asia and the development of a new and more reliable soil test for available sulfur. The new test (KCl-40) more accurately measured the sulfur available to plants, as it was able to measure the sulfur held within organic matter. A spin-off from the...
Tipo: Book
Palavras-chave: Sulfur; Canola; Australia; Soil; Phosphorus; Nutrient dynamics; South-east Asia; KCl; Livestock; Economic evaluation; Yield; NSW; WA; Agribusiness; Crop Production/Industries; Farm Management; Food Security and Poverty; International Development; Livestock Production/Industries; Production Economics.
Ano: 1998
URL: http://purl.umn.edu/47501

Some Simulation Results for a Green Insurance Mechanism
Provedor de dados: 31
Autores: Baerenklau,   Kenneth A.
This analysis extends previous work on green insurance by proposing a mechanism that offers a stronger adoption incentive and is applicable to heterogeneous populations and non-binary adoption decisions. Endogenous learning about the new technology is incorporated, and empirically calibrated simulation results are presented for the case of reduced-phosphorus dairy diets. Results show that the mechanism has a significant impact on behavior and may incur no net cost for the regulator when an insurance premium is charged. Conditions under which a green payment mechanism may be preferable to green insurance also are discussed.
Tipo: Journal Article
Palavras-chave: Conservation technology adoption; Dairy farming; Endogenous learning; Green insurance; Phosphorus; Risk preferences; Voluntary programs; Environmental Economics and Policy.
Ano: 2005
URL: http://purl.umn.edu/30787

Macro Level Economic Evaluation of Manure Application Rates Using CEEOT-MMS
Provedor de dados: 31
Autores: Osei,   Edward.
Alternative manure application rates represent an integral part of current nutrient management efforts on animal feeding operations (AFOs). Previous studies have indicated that lower manure application rates tend to increase farm production costs. In this study, the Comprehensive Economic and Environmental Optimization Tool - Macro Modeling System (CEEOT-MMS) was used to evaluate the farm-level economic implications of alternative manure application rates for all AFOs in the 48 contiguous states of the U.S. Representative farms derived through statistical disaggregation of national databases and K-means clustering were simulated within the the Farm-level Economic Model (FEM) to determine the economic impacts of four manure application rates.  The highest...
Tipo: Conference Paper or Presentation
Palavras-chave: FEM; CEEOT-MMS; Animal feeding operations; Clustering; Costs; Manure; Phosphorus; Crop Production/Industries.
Ano: 2008
URL: http://purl.umn.edu/6240

ECONOMIC RETURNS FROM REDUCING POULTRY LITTER PHOSPHORUS WITH MICROBIAL PHYTASE
Provedor de dados: 31
Autores: Bosch,   Darrell J.; Zhu,   Minkang; Kornegay,   Ervin T.
Requiring that crop applications of manure be based on phosphorus content (P-standard) could increase poultry litter disposal costs. Microbial phytase reduces litter P content and could reduce litter disposal costs under a P-standard.  For a representative Virginia turkey farm, phytase costs $2,500 and could increase value of litter used for fertilizer on the turkey farm by $390 and reduce supplemental P feed costs by $1,431. Based on assumed litter demand and supply, estimated litter export prices with phytase could exceed export prices without phytase by $3.81 per ton. Phytase net returns to the farm are an estimated $ 1,435.
Tipo: Journal Article
Palavras-chave: Economic returns; Microbial phytase; Nutrient management; Phosphorus; Poultry litter; Water quality; Livestock Production/Industries.
Ano: 1997
URL: http://purl.umn.edu/15056

Site-Specific Simulation of Nutrient Control Policies: Integrating Economic and Water Quality Effects
Provedor de dados: 31
Autores: Burkhart,   Christopher S.; Jha,   Manoj K.
A watershed-based modeling system is developed to assess alternative nutrient abatement policies, including fertilizer taxes, application caps, and uniform reductions. A microeconometric model of nutrient use is estimated using farm-level data, prices, and spatially detailed soil and land characteristics. Results are interfaced with a physical watershed model to predict water quality changes. Simulations demonstrate differences in water quality effects across policies. For nitrate loads at the watershed outlet, an application cap provides slightly superior performance for small reductions, but a tax is more efficient under larger reductions. Phosphorus reductions at the subwatershed level vary but provide information about policy tradeoffs.
Tipo: Article
Palavras-chave: Nitrogen; Nutrient policy; Phosphorus; Water quality; Environmental Economics and Policy; Farm Management; Resource /Energy Economics and Policy.
Ano: 2012
URL: http://purl.umn.edu/122307

Effects of Macronutrients on Seed Quality and Profitability Analysis of Sunflower Production in Northwest Pakistan
Provedor de dados: 31
Autores: Amanullah; Khan,   Mir Wali; Almas,   Lal K.; Stewart,   Bob A.
Potassium (K) and phosphorus (P) application to sunflower (Helianthus annus L.) reduced cost of production, increased seed oil and protein concentration, yield and net returns on the K and P deficient soils in Northwest Pakistan. Field experiment was conducted at the New Developmental Research Farm of NWFP (North West Frontier Province) Agricultural University Peshawar, Pakistan during summer 2006. The experiment was carried out in a randomized complete block design with split plot arrangements using three replications. Six levels of K (0, 25, 50, 75, 100 and 125 kg ha-1) were kept in main plots while four levels of P (0, 45, 90 and 135 kg ha-1) were kept in sub-plots. Increase in K and P levels enhanced seed oil concentration, on the other hand, increase...
Tipo: Conference Paper or Presentation
Palavras-chave: Sunflower; Potassium; Phosphorus; Oil; Protein; Economic analysis; Northwest Pakistan; Farm Management; International Development; International Relations/Trade; Production Economics; Productivity Analysis.
Ano: 2010
URL: http://purl.umn.edu/56437

Costs of Reducing Nutrient Losses in Denmark - Analyses of Different Regulation Systems and Cost Effective Measures
Provedor de dados: 31
Autores: Jacobsen,   Brian H.; Abildtrup,   Jens; Jensen,   Jorgen Dejgaard; Hasler,   Berit.
The economic calculations carried out prior to the Plan for the Aquatic Environment III included a comparison of regulation systems aimed at reducing nitrogen leaching, analyses of measures for reducing phosphorus losses and estimation of administrative costs. The conclusions were that taxation of the N-surplus introduced at the sector level was the most cost effective regulation when compared with administrative regulation and set a side. For phosphorus a balance between incoming and outgoing phosphorus is very costly as this requires that much slurry is transported from the western to the eastern part of Denmark. The final plan for the Aquatic Environment III from 2004 included a 13% reduction of N-leaching until 2015 based on cost effective...
Tipo: Conference Paper or Presentation
Palavras-chave: Cost-effectiveness; Cost of reducing nitrogen leaching; Phosphorus; Administrative costs; Agricultural and Food Policy; Q51; Q52; Q53.
Ano: 2005
URL: http://purl.umn.edu/24536

Effects of nutrient impoverishment on phytoplankton biomass: a mesocosms experimental approach in a shallow eutrophic reservoir (Garças Pond), São Paulo, southeast Brazil
Provedor de dados: 88
Autores: Crossetti,Luciane O; Bicudo,Carlos E. de M.
Nutrient impoverishment in mesocosms was carried out in a shallow eutrophic reservoir aiming to evaluate the nutrient removal technique as a method for eutrophication reduction. Garças Pond is located in the Parque Estadual das Fontes do Ipiranga Biological Reserve situated in the southeast region of the municipality of São Paulo. Three different treatments were designed, each consisting of two enclosures containing 360 liters of water each. Mesocosms were made of polyethylene bags and PVC pipes, and were attached to the lake bottom. Treatment dilutions followed Carlson's trophic state index modified by Toledo and collaborators, constituting the oligotrophic, mesotrophic, and eutrophic treatments. Ten abiotic and 9 biological samplings were carried out...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biomass; Impoverishment; Mesocosms; Phosphorus; Phytoplankton.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042005000100009

Hybrid Phytase and Carbohydrases in Corn and Soybean Meal-Based Diets for Broiler Chickens: Performance and Production Costs
Provedor de dados: 89
Autores: Bavaresco,C; Krabbe,E; Gopinger,E; Sandi,AJ; Martinez,FN; Wernik,B; Roll,VFB.
ABSTRACT This study aimed to evaluate the effect of using 500 FTU/kg of hybrid phytase (created from three bacteria - Natuphos E), with or without xylanase and glucanase (560 TXU/kg; 250 TGU/kg) - Natugrain TS, in corn and soybean meal-based diets, with nutritional reductions in metabolizable energy (ME), Ca, and available phosphorus (AP), on performance parameters and production costs in broiler chickens. The 1875chickens were housed in boxes and distributed among 5 treatments with 15 replicates of 25 chickens each. The experiment included a positive control (the diet of which met the nutritional requirements of the birds), two negative controls (with ME reductions of 70 and 100 kcal/kg, and fixed reductions in Ca [0.16%] and AP [0.15%]), and two...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Calcium; Cost; Energy; Enzyme; Phosphorus.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2020000100319

Salmonella Enteritidis in the eggs of Japanese quails (Coturnix coturnix japonica - Temminck &amp;amp; Schlegel, 1849) fed diets with different calcium and phosphorus levels
Provedor de dados: 89
Autores: Katayama,ERi; Donato,TC; Silva,A de P; Mazola,RP; Garcia,EA; Okamoto,AS; Andreatti Filho,RL.
Several studies point out that eggs are the main cause of human salmonellosis, particularly when poorly processed or eaten raw. In addition of causing public health problems, the presence of Salmonella hinders international food trade, and therefore, it is a health barrier. There are several predisposing factors for the contamination of internal egg content by Salmonella spp, including eggshell quality, which is related to dietary calcium (Ca) and phosphorus (P) levels. In this study, eggs from Japanese quails fed diets containing two different Ca (2.0 or 3.5%) or P (0.25 or 0.45%) levels were evaluated. Three production phases were used in the experiment: starter, intermediate, and final. The presence of Salmonella Enteriditis in the eggshell and internal...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Calcium; Quail production; Coturnix japonica; Phosphorus; Salmonellosis.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2013000100005

Litter characteristics and pododermatitis incidence in broilers fed a sorghum-based diet
Provedor de dados: 89
Autores: Carvalho,CMC; Litz,FH; Fernandes,EA; Silveira,MM; Martins,JM da S; Fonseca,LA; Zanardo,JA.
The aim of this study was to evaluate the incidence of footpad dermatitis and quality of broilers litter fed with sorghum grain and diets based in corn. It was used 544 male and female chicks, distributed in a completely randomized design with two treatments and eight replications. The chicken feed was formulated and produced from corn, soybean meal and sorghum grain. In the formulation were kept constant levels of energy and protein in accordance with the following treatments: A. Control (diet based on corn and soybean meal); B. Grain sorghum (Whole Sorghum + soybean meal). At 35 and 42 days were evaluated mineral matter (A %), calcium (Ca%), phosphorus (P%), pH and dry matter (DM %) of the poultry litter. To evaluate the footpad dermatitis were evaluated...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Turkey; Enteritis; Viruses; Poults; Diagnosis; Calcium; Environmental impact; Phosphorus.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2014000300010

Evaluation of nutrient excretion and retention in broilers submitted to different nutritional strategies
Provedor de dados: 89
Autores: Graña,AL; Tavernari,FC; Lelis,GR; Albino,LFT; Rostagno,HS; Gomes,PC.
An experiment was carried out to evaluate the effects of different nutritional strategies on nitrogen (N), phosphorus (P) and calcium (Ca) balance and on copper (Cu), manganese (Mn) and zinc (Zn) excretion in broilers during the periods of 1 to 21 days and 1 to 46 days of age. Four hundred male Cobb-500 broilers were used. A randomized block experimental design was applied, including five treatments with eight replicates of 10 birds each. A five-phase feeding program was adopted (1-8, 9-21, 22-33, 34-40 and 41-46 days of age). Treatments consisted of a control diet (C) with typical protein level and low amino acid supplementation; a reduced-protein diet supplemented with synthetic amino acids formulated on ideal protein concept (IP); C with phytase (C+PHY)...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Enzyme; Phosphorus; Organic trace minerals; Ideal protein.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2013000200013

Effect of Graded Levels of an Enhanced E.coli Phytase with Step-Wise Reduction of Supplemental Inorganic Phosphate on Growth Performance of Broilers Fed Corn-Soy Diet
Provedor de dados: 89
Autores: Poernama,F; Wibowo,TA; Gomes,GA; Aftab,U.
ABSTRACT This study evaluated the potential of incremental doses of an enhanced Escherichia coli-derived phytase to support step-wise reduction of supplemental inorganic phosphate in an all-vegetable broiler diet. Corn-soybean meal-based diets containing 0.40/0.80%, 0.35/0.70%, and 0.30/0.60% avP and Ca, respectively from 0-10, 10-25, and 26-42 days posthatch served as experimental control (PC). Three test diets were formulated with 500, 1000, and 1500 FTU/kg of phytase assigned respectively an avP matrix of 0.15, 0.19, and 0.23% and a fixed Ca matrix of 0.15%. An additional diet (PC++) containing extra avP and Ca (+0.05% avP/+0.1% Ca) to that of PC was included to test if avP and Ca were not limiting in PC. Each diet was offered to 16 replicates of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Broiler; Phytase; Inorganic phosphate; Phosphorus.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2020000200310

Reduced Nutrient Excretion and Environmental Microbial Load with the Addition of a Combination of Enzymes and Direct-Fed Microbials to the Diet of Broiler Chickens
Provedor de dados: 89
Autores: Praes,MFFM; Lucas Junior,J; Duarte,KF; Sorbara,JOB; Matos Junior,JB; Sgavioli,S; Domingues,CHF; Garcia,RG; Hermes,RG.
Abstract This study evaluated the effects of the dietary inclusion of an enzyme blend and a direct-fed microbials in broiler diets on litter production and quality. In total, 900 Cobb 500(r) broiler chicks were distributed according to a completely randomized design into 4 treatments and 9 replicates of 25 birds each. Broilers were reared from 1 to 42 days of age. The treatments consisted of the following diets: NC: negative control; DFM: NC + 500 ppm of direct-fed microbials product (DFM), containing Bacillus subtilis and Bacillus licheniformis; ENZ: diet formulated with an enzyme blend (20 ppm phytase, 200 ppm protease and 200 ppm of xylanase); DFM+E: ENZ + DFM. Birds and litter were weighed at the start and end of the rearing period, for litter...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Waste ratio; Total and thermotolerant coliforms; Phosphorus; Nitrogen; Potassium.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2016000100125

Comparison of the Growth and Mineralization of the Femur, Tibia, and Metatarsus of Broiler Chicks
Provedor de dados: 89
Autores: Han,JC; Qu,HX; Wang,JG; Chen,GH; Yan,YF; Zhang,JL; Hu,FM; You,LY; Cheng,YH.
ABSTRACTThis study aimed at comparing the growth and mineralization of the femur, tibia, and metatarsus of male and female broiler chicks. On the day of hatch, 100 male and 100 female Ross 308 broiler chicks were transferred stainless cages with 10 birds per cage. On d 7, 14, 21, 28, 35, and 42, five males and five females were sacrificed and their femur, tibia, and metatarsus were collected. Results showed that the tibia was the heaviest and the longest and contained the highest content of ash and calcium (Ca) among the three leg bones. The femur had the greatest diameter. The weight, length, diameter, and ash weight of the femur, tibia, and metatarsus linearly increased with age. The ash, Ca, and phosphorus (P) content in the femur and the tibia...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bone; Mineralization; Calcium; Phosphorus; Broiler chick.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2015000300333

Heat-resistant bacterial phytase in broiler pelleted diets
Provedor de dados: 89
Autores: Carlos,TC de F; Barbosa,LCGS; Shiroma,NN; Dari,RL; Baolin,G; Yongcheng,W; Araújo,CS da S; Araújo,LF.
The objective of the study was to evaluate the effects of a heat-resistant bacterial phytase added to pelleted diets on mineral digestibility, live performance, carcass traits, and bone quality of broilers. Three treatments were evaluated: Positive control; negative control, with 0.10 points reduction in calcium level and 0.15 points reduction in available phosphorus level; and negative control + phytase at 500 FTU/kg. Mineral digestibility and bone quality results demonstrated that the evaluated phytase resisted pelleting as it increased the utilization of the minerals present in the diet.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Performance; Digestibility; Enzyme; Phytate; Phosphorus; Broiler nutrition.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2015000100045

Dependency and Response of Apuleia leiocarpa to Inoculation with Different Species of Arbuscular Mycorrhizal Fungi
Provedor de dados: 90
Autores: Oliveira Júnior,Joel Quintino de; Jesus,Ederson da Conceição; Pereira,Marcos Gervasio; Camara,Rodrigo; Fonseca Júnior,Ariovaldo Machado; Sousa,Ana Carolina Oliveira.
ABSTRACT Inoculation with arbuscular mycorrhizal fungi (AMF) is a strategy to improve the efficiency of forest plantations, reducing costs and increasing the survival of plant species. The objective of this study was to assess the response and mycorrhizal dependency of seedlings of the forest species Apuleia leiocarpa (Vogel) J.F. Macbr to inoculation with AMF. The experiment was conducted in a completely randomized design using a 5 × 5 factorial arrangement with six replications. The treatments consisted of combinations of five P rates (0, 24, 71, 213, and 650 mg kg-1) with five types of inoculations with AMF (inoculation with the fungi Rhizophagus clarus, Gigaspora margarita, Dentiscutata heterogama, inoculation with an AMF mix of these three species,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Endomycorrhiza; Phosphorus; Nutritional characteristics.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832017000100406

Recovery of degraded pasture in Rondônia: macronutrients and productivity of brachiaria brizantha
Provedor de dados: 90
Autores: Noronha,Norberto Cornejo; Andrade,Cristiano Alberto de; Limonge,Fernando Célio; Cerri,Carlos Clemente; Cerri,Carlos Eduardo Pellegrino; Piccolo,Marisa de Cássia; Feigl,Brigitte Josefine.
Pasture is the main form of land use in Amazonia. Over time the pasture grass loses vigor and yields decrease, indicating a certain degree of degeneration. The main causes of degradation are lack of pasture maintenance and subsequent weed infestation, the choice of regionally unsuitable forage species and excessive grazing. The main purpose of this study was to evaluate the impact of different recovery managements on soil chemical properties and grass yield of a degraded pasture in Rondônia. For this purpose, an experiment was installed in October 2001, consisting of five treatments: C = control; HA = harrowing + NPK + micronutrients; HE = Herbicide + NK + micronutrients; R = No-tillage rice + NPK + micronutrients; and S = No-tillage soybean + PK +...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Pasture rehabilitation; Soil; Fertilization; Phosphorus; Phosphate.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832010000500023

Growth and Nutrition of Eucalypt Rooted Cuttings Promoted by Ectomycorrhizal Fungi in Commercial Nurseries
Provedor de dados: 90
Autores: Gandini,Andrezza Mara Martins; Grazziotti,Paulo Henrique; Rossi,Márcio José; Grazziotti,Danielle Cristina Fonseca Santos; Gandini,Elizzandra Marta Martins; Silva,Enilson de Barros; Ragonezi,Carla.
ABSTRACT Ectomycorrhizal fungi (EMF) may improve the adaptation of eucalypts saplings to field conditions and allow more efficient fertilizer use. The effectiveness of EMF inoculum application in promoting fungal colonization, plant growth, nutrient uptake, and the quality of rooted cuttings was evaluated forEucalyptus urophylla under commercial nursery conditions. For inoculated treatments, fertilization of the sapling substrate was reduced by 50 %. The experiment was carried out in a completely randomized design in a 4 × 4 factorial arrangement, wherein the factors were inoculum application rates of 0 (control), 5, 10, and 15 gel beads of calcium alginate containing the vegetative mycelium of Amanita muscaria, Elaphomyces antracinus, Pisolithus...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Symbiosis; Plant nutrition; Cuttings production; Phosphorus; Nitrogen; Potassium.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832015000601554

Phosphate forms in plant and their internal buffering in five soybean cultivars
Provedor de dados: 90
Autores: Martinez,Hermínia Emília Prieto; Novais,Roberto Ferreira; Rodrigues,Luciana Aparecida; Sacramento,Luis Vitor Silva do.
Differences among plants in their ability to support nutritional stress periods may be caused by a differential vacuole capacity of ion storage and release and may also depend on the intensity of nutrient re-translocation under such conditions. In five soybean cultivars, submitted to eight days of P deprivation, the dry matter production and the contents of three phosphorus (P) forms - inorganic (Pi), organic (Po), and acid-soluble total (Pts) of different plant organs were determined. Pi release velocity (RSPi) was estimated as the tangent to the equations obtained for Pi f(t) at the point t = 2 days (the mean point in the period of greatest Pi decrease), considering that -deltaPi/deltat expresses the rate of Pi release. The internal Pi buffering capacity...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Phosphorus; Phosphate fractions; Phosphorus deprivation; Nutritional stress.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832005000200010

Phosphorus behavior on an Oxisol fertilized by phosphate alkaline biosolid and cultivated with common bean
Provedor de dados: 91
Autores: Silva,Luiz C. da; Lucchesi,Luiz A. C.; Koehler,Henrique S.; Campos,Milton C. C.
This study aimed to evaluate the extractable phosphorus Mehlich-1 in a distrophic Red-Yellow Latosol (Oxisol) which received alkaline sewage sludge (alkaline biosolid) along with 0, 0.436, 0.872 and 1.745 dag kg-1 of P from three different sources and cultivated with common bean (Phaseolus vulgaris cv. IPR Uirapuru) in greenhouse. It also aimed to quantify the phosphorus uptake by the plant, plant production and the relative agronomic effectiveness index. For the establishment of the treatment the recommended dose was 45.85 kg ha-1 of P from the treatments, except the control (0 dag kg-1 of P). This dose was calculated for 2.5 kg of this Oxisol from Contenda, Paraná State, Brazil, contained in recepients of 3 dm3 with 6 cultivated bean plants (cv. IPR...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Phosphorus; Dose; Grains; Dry mass; Phaseolus vulgaris.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662012001200001

Nitrogen and phosphorus fertilization of sunflower crop in alkaline Cambisol
Provedor de dados: 91
Autores: Braga,Daniely F.; Oliveira,Fabio H. T. de; Santos,Hemmannuella C.; Araújo,Adelson P.; Zonta,Everaldo.
ABSTRACT Sunflower is a crop that has aroused the interest of farmers because of its adaptability to wide climatic conditions and for its use in biodiesel production. However, there are only a few studies on sunflower fertilization in alkaline soils. This study aimed to evaluate nitrogen (N) and phosphorus (P) fertilization in sunflower (Helianthus annuus L.) cultivated in alkaline soil. A field experiment was carried out in Baraúnas-RN, Brazil, in a Haplic Cambisol derived from calcareous rock, where the sunflower H-251 hybrid was cultivated. The treatments were a combination of four doses of N (30, 60, 90 and 120 kg ha-1) and four doses of P2O5 (30, 60, 90 and 120 kg ha-1). Sunflower growth and yield increased with the doses of N and P2O5. Doses of 30 kg...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Helianthus annuus; Oilseed crop; Nitrogen; Phosphorus.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662018000200101

Biofertilizers and performance of Paenibacillus in the absorption of macronutrients by cowpea bean and soil fertility
Provedor de dados: 91
Autores: Silva,Valéria N. da; Silva,Luiz E. de S. F. da; Silva,Apolino J. N. da; Macedo,Gorete R. de.
ABSTRACT The study was conducted in a greenhouse at the Agricultural Research Corporation of Rio Grande do Norte (EMPARN), in order to evaluate the effect of biofertilizers and potassium phosphate rocks, triple superphosphate (TSP) and potassium chloride (KCl), crushed rocks on the chemical properties of the soil and performance of the bacteria Paenibacillus polymyxa in the absorption of macronutrients by the cowpea bean crop. An Ultisol (10 kg per pot) was used with the addition of biofertilizers at levels 40, 70, 100 and 200% of recommendation for TSP and KCl, inoculated or not with bacteria. There was an effect of fertilization on the absorption of macronutrients, being the best results for P and K with TSP + KCL, and N, Ca and Mg for the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: PRPG; Rock powder; Phosphorus; Potassium.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662015001201136

Growth and yield of strawberry plants fertilized with nitrogen and phosphorus
Provedor de dados: 91
Autores: Medeiros,Reinaldo F.; Pereira,Walter E.; Rodrigues,Rummenigge de M.; Nascimento,Ronaldo do; Suassuna,Janivan F.; Dantas,Tony A. G.
ABSTRACTStrawberry (Fragaria x ananassa) is a crop that has rapid growth and is highly influenced by fertilization. Due to its development speed, the plant needs to absorb sufficient macronutrients in order to meet its demand. The objective of this research was to evaluate growth and yield of strawberry under different doses of nitrogen (N), phosphorus (P) and potassium (K) fertilization. The treatments, using Box's central composite design, were distributed in randomized blocks with four replicates and consisted of five N doses (0.16, 0.37, 0.88, 1.4 and 1.6 g plant-1) and five P doses (0.3, 0.58, 1.2, 1.8 and 2.1 g plant-1), in the presence (1.67 g plant-1) and absence of K. Seedlings of the cultivar 'Oso Grande' were cultivated in 10-L pots. The...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fragaria x ananassa Duch.; Nitrogen; Phosphorus; Potassium.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662015000900865

Spatial arrangements and fertilizer doses on soybean yield and its components
Provedor de dados: 91
Autores: Duarte,Tiago C.; Cruz,Simério C. S.; Soares,Guilherme F.; Sena Júnior,Darly G. de; Machado,Carla G.
ABSTRACT The aim with this study was to evaluate the effects of single- and twin-row spatial arrangements associated with different doses of fertilization on soybean yield and its components. The experiment was carried out at Federal University of Goiás, Campus of Jataí, in a split-plot randomized block design with 10 treatments and four replicates. Each plot corresponded to a dose of P and K fertilization (0, 50, 100, 200 and 400% of the recommended dose) and the subplots to two types of spatial arrangements: single and twin rows. The yield components evaluated were plant final population, number of pods and seeds per plant, number of seeds per pod, weight of a thousand grains and yield. The increase in fertilization dose, even at doses two and four times...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Glycine max (L.); Twin rows; Spacing; Phosphorus; Potassium.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662016001100960

Phosphate and nitrogen fertilization in the production of Barueiro (Dipteryx alata Vog.) seedlings
Provedor de dados: 94
Autores: Pinho,Erika Katianne Costa; Costa,Ana Claudia; Vilar,Cesar Crispim; Souza,Manoel Euzébio de; Silva,Aline Borges Vilela; Oliveira,Carlos Henrique Gomes de.
Abstract  Barueiro (Dipteryx alata Vog.), a fruit tree native to the Brazilian cerrado, has aroused the interest of producers and consumers due to its almond highly appraised and valued by local markets. To obtain quality barueiro seedlings, balanced fertilization is required, with special attention to the supply of phosphorus and nitrogen, essential for seedling growth and establishment in the field. The aim of this study was to evaluate the growth of barueiro seedlings produced with different phosphate and nitrogen concentrations in Nova Xavantina – MT. The experiment was conducted at the seedling nursery of the Mato Grosso State University (UNEMAT), Campus of Nova Xavantina - MT, from December 2017 to April 2018. The experimental design was randomized...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Baru; Phosphorus; Nitrogen; Propagation.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452019000603001

Physiological potential of Brachiaria brizantha cv. Marandu seeds kept in contact with phosphatic fertilizers
Provedor de dados: 95
Autores: Peres,Amanda Ribeiro; Vazquez,Gisele Herbst; Cardoso,Renata Danielle.
The effect of mixture of seeds of Brachiaria brizantha, cv. Marandu, with different sources, granulometry, and phosphatic fertilizer doses during various periods of exposure on the physiological potential of the seeds has been assessed. The treatments consisted in seed exposure during periods of 0, 3, 6, 12, 24, 36, 48, 72, 96, and 120 h to the following fertilizers: ground granulated single superphosphate (SS), and powdered (SSp); and ground granulated ammonium monophosphate (AMP), at doses of 40 and 80 kg P2O5 ha-1. Tests of germination, tetrazolium, moisture content, and vigor (first count, electrical conductivity, emergence, emergence speed, and fresh mass of seedlings) were performed. It has been concluded that seed physiological potential of B....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Phosphorus; Seed-fertilizer mixture; Exposure period; Vigor.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-31222012000300009

Phytase in diets for Nile tilapia in the growth period
Provedor de dados: 96
Autores: Bock,Claudio Luiz; Pezzato,Luiz Edivaldo; Cantelmo,Osmar Angelo; Barros,Margarida Maria.
This research was carried out to compare the effect of phytase on performance, in the incorporation and excretion phosphorus in Nile tilápia. Four diets were used: one standard (contol), composed by 3,200 DE kcal ED/kg of ration and 30.0% CP and supplemented with phosphorus (4.0% of dicalcium phosphate), considering the treatment control, and others three, without phosphorus supplementation, with different phytase levels (1,000, 1,500, and 2,000 uf/kg), with four replication, per a period of 82 days. Circular tanks of fiber glass, with constant flow and aeration were used. The results demonstrated that the use of phytase in diets for fish production can reduce the levels of inorganic phosphorus in the diets and minimizing the impacts caused by phosphorus...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Excretion; Fish; Growth; Oreochromis niloticus; Phosphorus; Pollution.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982007000700001

Yield and botanical composition of a mixed grass-legume pasture in response to maintenance fertilization
Provedor de dados: 96
Autores: Andrade,Carlos Mauricio Soares de; Valentim,Judson Ferreira; Pereira,João Batista Martiniano; Ferreira,Aliedson Sampaio.
This study was carried out on a low-productive Brachiaria brizantha cv. Marandu pasture, mixed with Arachis pintoi cv. Belmonte (forage peanut), established 13 years ago in a Red-Yellow Latosol in Acre State, western Brazilian Amazon. The purpose was to evaluate the response of this pasture to different fertilizer combinations, aiming at identifying the nutritional factors responsible for the fall of pasture carrying capacity and for the reduced vigor of forage peanut. It was used a randomized complete block design, with three replications and 12 combinations of nitrogen, phosphorus, potassium, lime, sulfur, and micronutrients (100 kg/ha of N, P2O5 and K2O; 300 kg/ha of dolomitic lime; 30 kg/ha of sulfur and FTE BR-10). Fertilizers were broadcast in 5 ×...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazonia; Arachis pintoi; Brachiaria brizantha; Nitrogen; Pasture degradation; Phosphorus.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982010000800003

Available phosphorus levels in diets for 30 to 60 kg female pigs selected for meat deposition by maintaining calcium and available phosphorus ratio
Provedor de dados: 96
Autores: Saraiva,Alysson; Donzele,Juarez Lopes; Oliveira,Rita Flávia Miranda de; Abreu,Márvio Lobão Teixeira de; Silva,Francisco Carlos de Oliveira; Vianna,Rafael Alves; Lima,Anderson Lazarini.
With the objective to evaluate levels of available phosphorus (aP) in diets for pigs selected for meat deposition by maintaining the calcium and available phosphorus ratio, it was used 50 commercial hybrid female pigs with initial weight of 30.32 ± 0.29 kg, distributed in a complete randomized experimental design, with five treatments, five replicates, and two animals per experimental unit. Treatments were composed of a corn-soybean meal basal diet and four diets obtained by supplementation of basal diet with dicalcium phosphate, resulting in diets with 0.144; 0.224; 0.304; 0.384 and 0.464% of aP. Calcium levels were adjusted by varying the quantities of limestone in the diets. There was no effect of aP on both daily feed intake and feed conversion. Levels...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Growth phase; Phosphorus; Performance; Requirement.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011000300017

Macromineral requirements by beef cattle under pasture supplementation
Provedor de dados: 96
Autores: Sales,Maykel Franklin Lima; Paulino,Mário Fonseca; Valadares Filho,Sebastião de Campos; Porto,Marlos Oliveira; Couto,Victor Rezende Moreira; Paulino,Pedro Veiga Rodrigues.
The objective of this work was to determine macromineral requirements by Zebu steers grazing Brachiaria decumbens supplemented with concentrate. It was used 24 non-castrated steers, at an average age of 7 months and at initial average weight 180 kg. Eight control animals were slaughtered for determining initial body composition. The 16 remaining animals were divided in four four-animal plots, in a complete random design. Each plot received mineral mixture or supplements at the levels 0.75; 1.50 or 2.25 kg/animal/day. The right half-carcass of eight animals, two per group, was dissected in muscle, fat and bones and all body constituents were weighted for determination of empty body weight and body composition. Net requirements of calcium and phosphorus for...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Calcium; Nutritional requirement; Phosphorus; Supplementation; Zebu.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011000200026

Apparent nutrient digestibility and mineral availability of protein-rich ingredients in extruded diets for Nile tilapia
Provedor de dados: 96
Autores: Guimarães,Igo Gomes; Pezzato,Luiz Edivaldo; Barros,Margarida Maria; Fernandes,Rosângela do Nascimento.
Apparent digestibility coefficients (ADC) of gross energy and dry matter (DM) and mineral availability were evaluated for eight protein-rich ingredients (corn gluten meal, soybean meal, cottonseed meal at 280.0 and 380.0 g/kg, poultry by-product meal, meat meal, fish meal and feather meal) in compound diets for Nile tilapia. Chromic oxide was used as inert digestibility marker. Higher ADC values of DM and energy were, respectively, 0.862 and 0.881 for corn gluten meal, 0.811 and 0.888 for poultry by-product meal; 0.729 and 0.731 for feather meal; 0.666 and 0.754 for fish meal; 0.578 and 0.642 for soybean meal; 0.476 and 0.652 for meat meal at 450.0 g/kg; 0.352 and 0.449 for cottonseed meal at 380 g/kg; and 0.251 and 0.324 for cottonseed meal at 280.0 g/kg....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Calcium; Feed evaluation; Gross energy; Nutritional value; Oreochromis niloticus; Phosphorus.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000800001

Effect of probiotic Lactobacillus reuteri XC1 coexpressing endoglucanase and phytase on intestinal pH and morphology, carcass characteristics, meat quality, and serum biochemical indexes of broiler chickens
Provedor de dados: 96
Autores: Wang,Lei; Feng,Yuzhe; Zhang,Xiaowei; Wu,Guofang.
ABSTRACT This study investigated the effect of transformed Lactobacillys reuteri on intestinal pH and morphology, carcass characteristics, meat quality, and serum biochemical indexes of broiler chickens. A total of 480 broilers were assigned to six treatment groups and fed a phosphorus-adequate diet, a phosphorus-deficient diet, or a phosphorus-deficient diet containing different L. reuteri recombinants. The results showed that transformed L. reuteri decreased the pH in the duodenum and jejunum of chickens at day 21, decreased drip loss and cooking loss of muscles, and improved muscle tenderness of chickens at days 21 and 42, but did not affect carcass characteristics and only slightly decreased abdominal fat. Transformed L. reuteri also significantly...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bird nutrition; Meat quality; Microbial additive; Phosphorus; PH; Villus.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982019000100519

Impact of dietary manipulation on nutrient flows and greenhouse gas emissions in cattle
Provedor de dados: 96
Autores: Kebreab,Ermias; Strathe,Anders; Fadel,James; Moraes,Luis; France,James.
The growing global demand for meat and particularly in countries such as Brazil is expected to increase intensive animal production. Consequently the main pollutants of interest are nitrogen (N), phosphorus (P) and greenhouse gases (GHG). Nitrogen can be a problem through nitrate leaching to water bodies, ammonia, and nitrous oxide emissions to air. Phosphorus loading in soil from manure application can be the main issue due to the tendency of P to accumulate in soil and leach to groundwater and rivers. The sources of agricultural GHG emissions include methane from enteric fermentation, manure storage and spreading, and nitrous oxide mainly from application of manure on land. Dietary manipulation has proven to be an effective tool to reduce...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Methane; Nitrogen; Phosphorus; Pollution; Ruminants.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982010001300050

Dietary phytase levels on performance and egg quality of Japanese quails
Provedor de dados: 96
Autores: Lima,Heder José D'Avila; Barreto,Sergio Luiz de Toledo; Donzele,Juarez Lopes; Valeriano,Matheus Henrique; Vieira,Patrícia Aparecida Fontes; Costa,Carlos Henrique Rocha.
The experiment was conducted to evaluate the addition of phytase on productive performance and egg quality of Japanese quails fed diets containing different levels of phytase. It was used 320 Japanese quails at 167 days of age, weighing 182.3 ± 3.8 g distributed in a completely randomized design with four experimental diets and eight repetitions of ten birds per experimental unit. Diets were formulated from a basal diet (control) and they were corn and soybean meal based, without supplementation, added with 200, 400 or 600 phytase activity unit (ftu). Supplementation of phytase in the diets improved productive performance and quality of eggs. Efficiency of phosphorus use for egg mass, from 0.13% of availability of this mineral in the ration, improved with...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Coturnix coturnix japonica; Enzyme; Nutritional profile; Phosphorus; Phytate.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011000100018

Decoupling of soil development and plant succession along a 60000 years chronosequence in Llaima Volcano, Chile
Provedor de dados: 97
Autores: GALLARDO,MARÍA-BELÉN; PÉREZ,CECILIA; NÚÑEZ-ÁVILA,MARIELA; ARMESTO,JUAN J.
Few studies have investigated the long-term evolution of nutrient limitation in ecosystems developed on volcanic soils. To approach the problem, we used "space for time substitution" to compare sites with the same state factors, except for the time elapsed since disturbance. Forests of Conguillio National Park in southern of Chile occur on volcanic soils that developed from lava flows and ash deposits of different ages originated from the activity of Llaima volcano. In this study we evaluate the patterns of change in carbon, nitrogen and phosphorus in soils and leaves, as well as changes in tree diversity and basal area along a chronosequence of volcanic substrates from 50 to 60,000 years AP (eight sites). We assessed the evolution of N and P limitation in...
Tipo: Journal article
Palavras-chave: N/P ratio; Phosphorus; Primary succession; Retrogression; Volcanic soils.
Ano: 2012
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2012000300004

Residual phosphate fertilization and Azospirillum brasilense in the common bean in succession to maize intercropped with Marandu grass
Provedor de dados: 124
Autores: Dickmann,Lourdes; Andreotti,Marcelo; Souza,Marcelo Fernando Pereira; Nakao,Allan Hisashi; Catalani,Gabriela Christal.
ABSTRACT One of the alternatives for achieving sustainable agriculture and a reduction in production costs, especially with phosphate fertilisers, is to inoculate seeds with bacteria of the genus Azospirillum. The aim of this study therefore, was to evaluate residual phosphate fertilisation and Azospirillum brasilense, together with the contribution of straw from maize intercropped with Marandu grass, on leaf nutritional content, yield components and winter bean yield. The experiment was carried out on the Teaching and Research Farm, of the School of Engineering at UNESP, located in Selvíria in the State of Mato Grosso do Sul, in a typic clayey dystrophic Red Latosol. The experimental design was of randomised blocks with four replications in a 5 x 2...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Urochloa brizantha; Phaseolus vulgaris; Crop-livestock integration; Phosphorus; No-tillage System.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902017000300404

Agronomic efficiency of polymer-coated triple superphosphate in onion cultivated in contrasting texture soils
Provedor de dados: 124
Autores: Chagas,Wantuir Filipe Teixeira; Guelfi,Douglas Ramos; Emrich,Eduardo Bucsan; Silva,André Leite; Faquin,Valdemar.
ABSTRACT Information related to phosphate fertilization and coated phosphate fertilizer in onion is scarce. Thus, this study was carried out to evaluate agronomic efficiency, production and nutritional characteristics of triple superphosphate coated with polymers in onion cultivated in contrasting texture soils. Two experiments were carried out under protected conditions in pots containing 5 kg soil. The experimental design was completely randomized with treatments arranged in a 2 x 5 factorial: triple superphosphate (TSP) and polymer-coated triple superphosphate (TSP+P) applied in five phosphorus rates: Dystroferric Red Latosol (LVdf) (clayey) = 0; 100; 200; 400; 800 mg P2O5 kg-1, and Quartzarenic Neosol (sandy) = 0; 75; 150; 300; 600 mg P2O5 kg-1, with...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Allium cepa L.; Coated fertilizers; Phosphorus.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902016000300439

Methods for evaluation of bone mineralization in foals
Provedor de dados: 195
Autores: Kerber, Claudia Ehlers.
Some of the main equine diseases are related to the musculoskeletal system, mainly during the bone developing in young animals. In São Paulo state, Brazil, the use of tropical grasses for grazing, the seasons and a general tendency to concentrate a large number of horses in small areas, frequently results on bone diseases, sometimes subtle, which depreciate the economic value of the horses and decrease the chance of a maximum performance. An early diagnosis of mineral imbalance play an important role once the bone diseases can be reversible when corrected on time. The author presents a review of physiology and pathophysiology of the bone. Also describe the methods available for diagnostic and suggest the phosphorus clearance as a sensitive, early, low cost...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Calcium; Phosphorus; Clearance; Bone; Equine cálcio; Fósforo; Clearance; Osso; Equinos.
Ano: 1999
URL: http://www.revistamvez-crmvsp.com.br/index.php/recmvz/article/view/3374

Bioavailability of Phosphorus and Micronutrients in the Soil-Plant-Microbe Continuum
Provedor de dados: 127
Autores: Rengel,Z.
Tipo: Journal article
Palavras-chave: Phosphorus; Micronutrients.
Ano: 2008
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-27912008000400013

PHOSPHORUS IN ORGANIC WASTE-SOIL SYSTEMS
Provedor de dados: 127
Autores: Fuentes,Bárbara; Bolan,Nanthi; Naidu,Ravi; Mora,María de la Luz.
Increases in the generation of organic wastes, in addition to decreases in natural resources, make it necessary to recycle these waste materials. In soils, the application of wastes as organic fertilizers, allows to reincorporate nutrients to the biogeochemical cycles. The application of wastes in agriculture has carried out with it problems associated with phosphorus (P) overapplication in soils and contamination of water bodies. Phosphorus inside the waste matrix forms organic and inorganic compounds which have different bioavailabilities. The more important factors that influence the bioavailability of P in soils, organic wastes and soil-organic waste amendments are: the soil solution pH, adsorption reactions, organic matter, phosphatase activity and...
Tipo: Journal article
Palavras-chave: Phosphorus; Bioavailability; Compost; Manure.
Ano: 2006
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-27912006000200006

LIVESTOCK PRODUCTION AND DIFFUSE POLLUTION IN A VOLCANIC SOIL
Provedor de dados: 127
Autores: Alfaro,Marta; Salazar,Francisco.
In developed countries, intensive grazing has been related to water pollution. The results of several projects carried out on a volcanic soil of the Osorno soil series on beef grazing production systems have shown that grazing management did not increase total nitrogen (N) and phosphorus (P) transfer and losses. Due to the high water infiltration capacity of the soil, runoff was &lt;1% of total drainage, therefore, N and P losses in runoff were small. Nitrogen leaching losses were high (3 up to 71 kg N ha-1 yr-1). Nitrogen loss in runoff was mainly lost as DON (c. 50%) while N leaching losses were mainly as nitrate (c. 70%). Total P losses ranged between 1 and 22 g P ha-1 yr-1 and they increased with increasing field slopes. Phosphorus was mainly lost as...
Tipo: Journal article
Palavras-chave: Nitrogen; Phosphorus; Dairy production; Beef production; Environmental impact.
Ano: 2008
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-27912008000200002

Mineral supplementation and productivity of the Shiitake mushroom on eucalyptus logs
Provedor de dados: 63
Autores: Queiroz,Elvio Cardoso; Marino,Regina Helena; Eira,Augusto Ferreira da.
Brazilian reports on Shiitake mushroom [Lentinula edodes (Berkeley) Pegler] productivity grown on Eucalyptus saligna (Sm.) logs are optimistic. The current production on this kind of wood is, however, low and variable. Aiming at increasing Shiitake mushroom productivity, the present work studied interactions among three concentrations of mineral supplement and three Shiitake strains (Le 95/01, 96/17 and 96/18) grown on seventh cut eucalyptus logs. Mineral fertilization was carried out when the logs were submerged in water to induce fruiting bodies, using the following saline concentrations: zero (no fertilizers added), 0.05% (equivalent to 0.35 g L-1 of ammonium sulfate with 18% nitrogen and 0.15 g L-1 of superphosphate with 34% phosphorus) and 0.50%....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Lentinula edodes; Nitrogen; Phosphorus.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162004000300003

Silicate and phosphate combinations for marandu palisadegrass growing on an oxisol
Provedor de dados: 63
Autores: Melo,Suzana Pereira de; Monteiro,Francisco Antonio; Manfredini,Daniel.
One of the greatest problems for pasture establishment and maintenance are the extremely low concentrations of available phosphorus in soils. The objective of this study was to evaluate the influences on productive and physiologic attributes during Marandu palisadegrass (Brachiaria brizantha) establishment, following changes in phosphorus availability in the soil through the applications of phosphate and silicate. To achieve this, a fractionated factorial 5² design was used, with 13 combinations for silicon and phosphorus, respectively, in mg dm-3: 150 and 10; 150 and 170; 150 and 330; 225 and 90; 225 and 250; 300 and 10; 300 and 170; 300 and 330; 375 and 90; 375 and 250; 450 and 10; 450 and 170 and 450 and 330, distributed according to randomized blocks,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Brachiaria brizantha; Leaf area; Phosphorus; Production; Silicon.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162007000300010

Eggplant growth as affected by bovine manure and magnesium thermophosphate rates
Provedor de dados: 63
Autores: Cardoso,Marinice Oliveira; Pereira,Walter Esfrain; Oliveira,Ademar Pereira de; Souza,Adailson Pereira de.
Plant growth is influenced by nutrient availability. The objective of this research was to study, under greenhouse conditions, eggplant growth as affected by rates of bovine manure and magnesium thermophosphate (g kg-1 and mg kg-1, respectively), according to a "Box central composite" matrix: 4.15-259; 4.15-1509; 24.15-259; 24.15-1509; 0.0-884; 28.3-884; 14.15-0,0; 14.15-1768; 14.15-884. Potassium sulfate (170 mg kg-1) and 200 mL per pot of cow urine solution were applied four times, but the concentration of the last two applications (200 mL/H2O L) was twice of that of the first two. Additional treatments: magnesium thermophosphate without cow urine and triple superphosphate with urea, both with nutrient levels equivalent to the bovine manure, P2O5 and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Solanum melongena; Organic fertilization; Phosphorus; Cow urine.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162008000100011

Soybean yield in response to application of phosphate rock associated with triple superphosphate
Provedor de dados: 63
Autores: Oliveira Júnior,Adilson de; Prochnow,Luís Ignácio; Klepker,Dirceu.
Soybean (Glycine max L. Merrill) crop started to be planted in the Brazilian Cerrado in the 1970's, and this region currently contributes with 57% of total soybean production in Brazil. Under natural conditions in this region, the soils present chemical limitations such as low pH, low Cation Exchange Capacity, low nutrient availability, and moreover, clayey soils have a high P fixation capacity mainly due to high contents of Fe/Al oxides. Since P is the most limiting nutrient is this region, a study was performed in the state of Maranhão, Brazil, in a Typic Hapludox, with clayey texture and low available P (extracted by resin). Treatments were defined to evaluate soybean response to broadcast Arad phosphate rock (PR) plus banded triple superphosphate (TSP)...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Brazil; Glycine max L. Merrill; Oxisols; P source solubility; Phosphorus; Cerrado soils.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162011000300016

Intercropping Acacia mangium stimulates AMF colonization and soil phosphatase activity in Eucalyptus grandis
Provedor de dados: 63
Autores: Bini,Daniel; Santos,Cristiane Alcantara dos; Silva,Mylenne Calcciolari Pinheiro da; Bonfim,Joice Andrade; Cardoso,Elke Jurandy Bran Nogueira.
ABSTRACT: Arbuscular mycorrhizal fungi (AMF) are very important to plant nutrition, mostly in terms of acquisition of P and micronutrients. While Acacia mangium is closely associated with AMF throughout the whole cycle, Eucalyptus grandis presents this symbiosis primarily at the seedling stage. The aim of this study was to evaluate the dynamics of AMF in these two tree species in both pure and mixed plantations during the first 20 months after planting. We evaluated the abundance, richness and diversity of AMF spores, the rate of AMF mycorrhizal root colonization, enzymatic activity and soil and litter C, N and P. There was an increase in AMF root colonization of E. grandis when intercropped with A. mangium as well as an increase in the activity of acid...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: AMF spores; Mycorrhiza; Mixed species; Soil enzymes; Phosphorus.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162018000200102

Phytase enzyme in diets containing defatted rice bran for growing swine
Provedor de dados: 63
Autores: Moreira,José Aparecido; Vitti,Dorinha Miriam Silber Schmidt; Trindade Neto,Messias Alves da; Lopes,João Batista.
Organic phosphorus is poorly utilized by monogastric animals because they lack phytase, the enzyme that cleaves the ortho-phosphate groups from the phytate molecule. Diets fed to pigs are supplemented with inorganic P, and this can increase environmental pollution and diet costs. Sixty mixed sex, half-breed pigs, were used to evaluate the effect of increasing dietary levels of phytase (253, 759, 1265 and 1748 PU kg-1 feed) on animal performance as compared to a control without phytase but supplemented with dicalcium phosphate. Enzyme levels did not affect daily feed intake, food conversion, average daily weight gain, plasma P and Ca, calcium and phosphorus in bone ash, and the calcium/phosphorus ratio in the plasma and bones. A quadratic relationship...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Environmental pollution; Nutrition; Performance; Phosphorus; Phytate.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162003000400004

Non-conventional P sources for zebu cows in Brazil
Provedor de dados: 63
Autores: Vitti,D.M.S.S.; Abdalla,A.L.; Lopes,H.O.S.; Pereira,E.A.; Meirelles,C.F.
To evaluate non-conventional phosphorus sources, a group of 400 Nellore cows mantained under pasture received a mineral mixture with different P sources (group I: superphosphate - 500 ppm P; group II: superphosphate - 340 ppm P plus rock phosphate Patos 160 ppm P; group III: superphosphate 340 ppm P plus dicalcium phosphate 160 ppm P; group IV - dicalcium phosphate 500 ppm P). There were no differences in pregnancy rate, calving rate and calving interval. A fluorine deposition in bone was observed for the treatments with superphosphate and rock phosphate (66.92 ± 15.53; 69.97 ± 6.5 and 64.05 ± 3.35% respectively for group I, II and III). Superphosphate was almost as good dicalcium phosphate to provide phosphorus for grazing cows and there was a potentially...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Phosphorus; Cattle; Rock phosphate; Fluorine.
Ano: 1995
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90161995000100014

Winery distillery waste compost effect on the performance of melon crop under field conditions
Provedor de dados: 63
Autores: Villena,Raquel; Castellanos,María Teresa; Cartagena,María Carmen; Ribas,Francisco; Arce,Augusto; Cabello,María Jesús; Requejo,María Isabel.
ABSTRACT: The substantial generation of organic waste together with increasing interest in developing sustainable agriculture heralds an opportunity for mobilizing the recycling of these materials as a source of organic matter and nutrients into a viable management strategy option. A field experiment was conducted to evaluate the use of compost derived from waste produced by the winery and distillery industries in a drip-irrigated melon crop traditionally grown in the area where these wastes are generated. A randomized complete block design was used with four treatments consisting of three different dose levels of compost: 7 (D1), 13 (D2) and 20 (D3) t ha−1 and a control (D0) without the application of compost. The effects of these treatments on plant...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cucumis melo; Growth; Yield; Nitrogen; Phosphorus.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162018000600494

Minjingu phosphate rock availability in low-pH highly weathered soil as affected by added salts
Provedor de dados: 63
Autores: Savini,Isaac; Koala,Saidou; Kihara,Job.
Concentrations and identity of ions in the soil solution may affect soil phosphorus (P) reactions and P availability. In this study, the magnitude of these reactions was evaluated following the application of Minjingu phosphate rock (MPR) combined with chloride and carbonate salts of Na and Ca within an incubation experiment. Twenty-one days later NaOH-P and HCl-P were determined. This investigation was undertaken with the aim of identifying the role of Ca-ion activity in the liquid phase on the solubilization of MPR and formation of insoluble Ca-P phases. The increase in pH was higher with Na2CO3 than with CaCO3, while both CaCl2 and NaCl resulted in slight decreases in pH. The dissolution of MPR was higher overall when MPR was applied singularly than for...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Phosphorus; Anion; Cation; Calcium.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162015000500440

PHOSPHORUS METABOLISM AND ESTIMATION OF PHOSPHORUS REQUIREMENTS FOR SHEEP
Provedor de dados: 63
Autores: LOUVANDINI,H; VITTI,D.M.S.S.
The main objective of the present work was to determine the effects of different dietary phosphorus (P) levels on endogenous faecal loss and to estimate the minimum daily requirement of P for sheep. The study was conducted with 24 Suffolk sheep which received a basic diet consisting of hay-concentrate mixture. The treatments consisted of different amounts of bone meal, added to the basic diet, so as to obtain supplementary P levels of 0, 1, 2 and 3g/day. Twenty-one days after the introduction of the experimental diet, 7.4 MBq radioactive P (32P) was injected into the left jugular vein of each sheep and blood, faeces and urine samples were collected daily for 8 days at 24-hour intervals. The samples were analysed for inorganic P and for radioactive specific...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Phosphorus; Sheep; Nutrition.
Ano: 1996
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90161996000100027

Vegetative growth of grain sorghum in response to phosphorus nutrition
Provedor de dados: 63
Autores: Camacho,Rafael; Malavolta,Eurípedes; Guerrero-Alves,José; Camacho,Tomás.
Morphological variables such as phytomass, plant height, leaf area, number of leaves, have been used to express the influence of mineral nutrients on plant growth patterns, since the vegetative development responds, in general, favorably to fertilizer applications. This work evaluates the effect of P on both, some morphological characteristics and total [P] in the shoot of eight grain sorghum (Sorghum bicolor L. Moench) genotypes. Genetic materials were grown in nutrient solution under three concentrations of P (0; 0.5 and 1.0 mmol L-1). Plants were harvested 41 days after sowing, and leaf area per plant (LA), number of leaves (NL) per plant, root volume (RV), plant height (PH), root dry matter (RDM), shoot dry matter (SDM), total dry matter (TDM), RDM/SDM...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Sorghum; Phosphorus; Leaf area; Plant height; Root volume.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162002000400022

Temperature influences swine wastewater treatment by aquatic plants
Provedor de dados: 63
Autores: Weirich,Carlos Eduardo; Feiden,Aldi; Souza,Camila Silveira; Marchetti,Clarice Rossato; Aleixo,Valdemir; Klosowski,Élcio Silvério.
ABSTRACT Studies show that aquatic plants are an efficient alternative to minimize the harmful effects of wastewater. Two species of aquatic macrophytes (Pistia stratiotes and Eichhornia crassipes) were chosen to evaluate the temperature effect on the performance of these macrophytes species in a post-treatment system of swine wastewater. The experiment was carried out in the municipality of Toledo, Paraná State, Brazil. For the experimental system, 24 concrete tanks with 80 L capacity were used, each measuring approximately 1.5 m in length, 0.25 m in width and 0.16 m deep. Wastewater characteristics and variables hydrogen potential (pH), electrical conductivity (EC), and dissolved oxygen (DO) were measured weekly. After, we analyzed the aquatic...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Pistia stratiotes; Eichhornia crassipes; Nitrogen; Phosphorus; Macrophytes.
Ano: 2021
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162021000400103

ผลของการพอกเมล็ดพันธุ์ข้าวโพดไร่ขนาดเล็ก ด้วยฟอสฟอรัสและโพแทสเซียม ที่มีต่อคุณภาพเมล็ดพันธุ์ การเจริญเติบโตของต้นกล้า และผลผลิต
Provedor de dados: 106
Autores: Nongnuch Saenghin; Boonmee Siri.
The objectives of this research were to investigate effects of seed pelleting of small corn seed with phosphorus and potassium on seed quality and seedling growth. The experiment was conducted in Complete Randomized Design (CRD) at Seed Quality Test Laboratory of Seed Processing Plant, Faculty of Agriculture, Khon Kaen University. The SPP033 hybrid corn was used for 4 replications and 6 treatments. T1) large-seed (unpelleting: size 20/64 in diameter screen) T2) small-seed (unpelleting: size 14/64 in diameter screen) T3) small seed pelleted with bentonite and charcoal and Hydroxylpropyl methylcellulose (HPMC) (P1) T4) small seed pelleted with P1 and phosphorus 0.070 mg. and potassium 0.644 mg./1 kg. of seed T5) small seed pelleted with P1 and phosphorus...
Tipo: PhysicalObject
Palavras-chave: Corn seed; Seed pelleting; Fertilization; Phosphorus; Potassium; Seed qaulity; Yield; Maize; Seedling growth; Seed size; Seed longevity; เมล็ดพันธุ์ข้าวโพด; การพอกเมล็ดพันธุ์; ธาตุอาหารพืช; ฟอสฟอรัส; โพแทสเซียม; การเก็บรักษาเมล็ดพันธุ์; เทคโนโลยีเมล็ดพันธุ์; คุณภาพเมล็ดพันธุุ์; ผลผลิต; อัตราการงอกของเมล็ด; ความแข็งแรงของเมล็ด; ต้นกล้า; การเจริญเติบโต.
Ano: 2014
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5721

การศึกษาความสัมพันธ์ระหว่างฟอสฟอรัสและกิจกรรมของเอนไซม์ไนโตรจีเนสของเชื้ออะโซสไปริลลัมในข้าวโพดพันธุ์สุวรรณ 5
Provedor de dados: 106
Autores: Sirinapa Chungopast; Thongchai Mala; Jirawat Phumphet; Wantanee Phungsang.
Phosphorus is one of essential nutrient element not only for plant growth but also for enhancing soil microorganisms. Phosphorus currently has been attributed to influence nitrogenase activity of nitrogen fixing microorganisms. This experiment aimed to study the interaction between phosphorus and nitrogenase activity of Azospirillum. The P sources came from soil, rock phosphate and activity of Bacillus megaterium. CRD with 4 replications, using Suwan 5 maize as the test plant, was carried in 2 experiments. The first experiment consisted 9 treatments and was conducted in laboratory, while the second experiment, consisted 8 treatments, was done in green house. The result showed significant nitrogenase activity in week 4 of incubation. The activity tended to...
Palavras-chave: Maize; Nitrogenase; Phosphorus; Azospirillum; Suwan 5 maize; ข้าวโพด; อะโซสไปริลลัม; หินฟอสเฟต; ฟอสฟอรัส; ไนโตรจีเนส; กิจกรรมของเอนไซม์; พันธุ์สุวรรณ 5.
Ano: 2010
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4672

Soil fertility and fertilizer research
Provedor de dados: 106
Autores: Dumri Thawornmas; Pradit Boonampol; Ring Meesawat; Boonnom Unkasem; Thianchai Arayangkoon; Mongkol Panichkul; Dissapan Thammapirume.
5 tables
Palavras-chave: Corn; Maize; Sorghum; Rock phosphate; Phosphorus; Nitrogen fertilizers; Varieties; Yields; ข้าวโพด; ข้าวฟ่าง; ความอุดมสมบูรณ์ของดิน; การใส่ปุ๋ย.
Ano: 1975
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3838

การเปลี่ยนแปลงความเข้มข้นของธาตุอาหารในใบพลับพันธุ์ ฟูยุ และ P2 ในรอบปี
Provedor de dados: 106
Autores: Jatupong Fujarern.
Thesis (M.Sc. in Agriculture)
Tipo: PhysicalObject
Palavras-chave: Persimmon leaf; Diospyros; Fuyu variety; P2 variety; Nutrient concentrations; Leaf analysis; Plant nutrition; Nitrogen; Phosphorus; Potassium; Calcium; Boron; Chiangmai province; Thailand; ใบพลับ; พันธุ์ฟูยุ; พันธุ์พีสอง; ธาตุอาหารพืช; การวิเคราะห์ระดับธาตุอาหาร; ระดับความเข้มข้น; ไนโตรเจน; ฟอสฟอรัส; โพแทสเซียม; แคลเซียม; โบรอน; จ.เชียงใหม่; ประเทศไทย.
Ano: 2009
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5504

Role of VAM on growth and phosphorus nutrition of maize with low soluble phosphate fertilization
Provedor de dados: 109
Autores: Rakshit,Amitava; Bhadoria,Pratapbhanu S.
The effect of vesicular arbuscular mycorrhizal (VAM) infection on growth and P nutrition in Maize (Zea mays, cv.DDH hybrid) were assessed in Oxisol pot experiment. Maize was grown inoculated with spores of VAM fungi Glomus mosseae or non-inoculated. Low soluble ferrous phosphate (FePO4.4H2O) was added to the mycorrhized and non-micrrohized maized. The dry weight of mycorrhized plants with added phosphate (P) were higher than in mycorrhized plants without added P or non-mycorrhized plants with added P. The amount of P in the soil samples from pots with mycorrhizal plants fertilized with P was evidently smaller than those in samples also fertilized non-mycorrhizal plants. The percentage of P was higher in tissues of fertilized mycorrhial plants than in those...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Mycoryhyzae; Micorrizas arbusculares; Glomus mosseae; Phosphorus; Maize; Oxisol.
Ano: 2010
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122010000100015

Genotype selection and addition of fertilizer increases grain yield in upland rice in Suriname
Provedor de dados: 36
Autores: NASCENTE,Adriano Stephan; KROMOCARDI,Ruby.
ABSTRACT The upland rice farmers in Suriname use local varieties and low level technologies in the field. As a result, the upland rice grain yield is low, at about 1 000 kg ha-1. Our objective was to evaluate the use of upland rice cultivars from Suriname and Brazil, and the effect of nitrogen, N, phosphorus, P, and potassium, K, fertilizers on cultivation variables. We undertook four field trials in the Victoria Area, in the Brokopondo District, using a randomized block design each with four replications. The most productive rice varieties were BRS Esmeralda (grain yield 2 903 kg ha-1) and BRS Sertaneja (2 802 kg ha-1). The highest grain yield of 2 620 kg ha-1 was achieved with a top dressing application of 76.41 kg N ha-1 20 days after sowing. For P, the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Oryza sativa L.; Rice varieties; Nitrogen; Phosphorus; Potassium.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672017000300185

The ceramic artifacts in archaeological black earth (terra preta) from Lower Amazon Region, Brazil: chemistry and geochemical evolution
Provedor de dados: 36
Autores: Costa,Marcondes Lima da; Kern,Dirse Clara; Pinto,Alice Helena Eleotério; Souza,Jorge Raimundo da Trindade.
This paper carried out a chemical investigation of archaeological ceramic artifacts found in archaeological sites with Black Earth (ABE) in the Lower Amazon Region at Cachoeira-Porteira, State of Pará, Brazil. The ceramic artifacts, mostly of daily use, belong to Konduri culture (from 900 to 400 years BP). They are constituted of SiO2, Al2O3, Fe2O3, Na2O and P2O5; SiO2 and Al2O3 together add up to 80 % and indicate influence of acid rocks, transformed into clay minerals basically kaolinite. The relative high contents of P2O5 (2.37 % in average) come out as (Al,Fe)-phosphate, an uncommon fact in primitive red ceramics, but found in some roman and egyptian archaeological sites. The contents of the trace elements are similar or below the Earth's crust...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Terra preta; Black earth; Lower Amazon; Soil; Chemistry; Phosphorus; Geochemical Evolution.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672004000300004

Relation between chemical composition of Grateloupia doryphora (Montagne) Howe, Gymnogongrus griffithsiae (Turner) Martius, and abiotic parameters
Provedor de dados: 39
Autores: Perfeto,Paulo Nelo Medeiros.
In Grateloupia doryphora and Gymnogongrus griffithsiae the seasonal variation of their chemical compounds was studied, establishing a relation with the physical and chemical properties of seawater. High values of proteins in the studied species were detected during the winter, 28.88% in G. doryphora and 26.68% in G. griffithsiae, corresponding to the maximum period of ammonium concentration in the marine environment. The variation in carbohydrates content showed an inverse relation with the proteins, with a maximum of 54.72% in G. doryphora and of 55.36% in G. griffithsiae, both in summer, positively correlated with salinity and temperature of sea water. Lipids content was low in both species. In G. doryphora the values ranged between 0.81 and 1.30% and,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Algae; Proteins; Carbohidrates; Lipids; Ashes; Nitrogen; Phosphorus; Potassium.
Ano: 1998
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33061998000100006

The effect of different soil properties on arbuscular mycorrhizal colonization of peanuts, sorghum and maize
Provedor de dados: 39
Autores: Carrenho,Rosilaine; Trufem,Sandra Farto Botelho; Bononi,Vera Lúcia Ramos; Silva,Eraldo Schunk.
Arbuscular mycorrhizal fungi (AMF) are important for plant growth since they increase mineral influx. However, symbiosis efficiency is affected by many environmental factors. This study evaluated the effects of different treatments (+/- phosphorus; +/- liming; +/- organic matter; field, sandy or clayey soil textures) on root colonization (RC) of peanuts, sorghum and maize. The combination of these resulted in seventy-two treatments. The 2×2×2×3×3 factorial experiment was laid out in a randomized design. All data were subjected to variance analysis and the means were compared (Tukey at P&lt;0.05). Three months after seed germination, roots were collected to evaluate the percentage of RC. Results showed that soil texture and liming were the most important...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Mycorrhiza; Liming; Soil texture; Organic matter; Phosphorus.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062007000300018

Effects of forest structure on litter production, soil chemical composition and litter-soil interactions
Provedor de dados: 39
Autores: Capellesso,Elivane Salete; Scrovonski,Kellin Luana; Zanin,Elisabete Maria; Hepp,Luiz Ubiratan; Bayer,Cimélio; Sausen,Tanise Luisa.
ABSTRACT Litter production in forest ecosystems is a major indicator of primary productivity because litter helps incorporate carbon and nutrients from plants into the soil and is directly involved in plant-soil interactions. To our knowledge, few studies have investigated the relationship between species diversity and ecosystem processes in subtropical forest fragments. In this work, we determined forest structural parameters and assessed seasonal leaf litter input, leaf decomposition rate, litter quality and soil characteristics in two subtropical Atlantic Forest fragments. Litter production was greater in the native fragment with the higher species diversity (FN1). The two native fragments (FN1 and FN2) differed in basal area, volume and dominance in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biodiversity; Carbon; Decomposition; Phosphorus; Selection effect.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062016000300329

Export of N, P and K in barley subjected to fertilizer doses formulated with and without humic substance at sowing
Provedor de dados: 1
Autores: Oliveira, Kathia Szeuczuk de; Mendes, Marcelo Cruz; Ilibrante, Gustavo Arruda; Antoniazzi, Noemir; Stadler, Alan Junior; Antoniazzi, Ana Paula.
The aim of this study was to evaluate the effect of nitrogen fertilization with and without humic acid in barley cultivars on the export of nitrogen, phosphorus and potassium grains. The experiment was performed in the city of Guarapuava, PR, during the 2015 and 2016 growing seasons. The experimental design was in RCB in factorial 5 x 2, with the following sowing fertilization (kg ha-1): 0, 100 NPK, 100 NPK+HS, 250 NPK, 250 NPK+HS and two cultivars, BRS Brau and BRS Elis. The dose of 250 kg NPK with humic substance increased the nitrogen export to barley grains, with the highest levels occurring in the BRS Brau cultivar under favorable climatic conditions. Under favorable climatic conditions, the export of phosphorus to barley grains in the agricultural...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Hordeum vulgare; NPK fertilizer; Nitrogen; Phosphorus; Potassium.
Ano: 2019
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/42690

Fósforo como possível mitigador dos efeitos da deficiência hídrica sobre o crescimento e as trocas gasosas de Brachiaria brizantha cv. MG-5 Vitória - DOI: 10.4025/actasciagron.v31i2.836
Provedor de dados: 1
Autores: Kuwahara, Frank Akiyoshi; UNOESTE; Souza, Gustavo Maia; UNOESTE.
A deficiência é um dos principais fatores limitantes da agricultura restringindo as taxas fotossintéticas das plantas e seu crescimento. Pela importância econômica das pastagens tropicais, que também sofrem com o problema de períodos de deficiência hídrica, este estudo teve como objetivo verificar os efeitos de diferentes doses de fósforo (24, 50, 100 e 150 mg P DM-3) combinadas com dois regimes de irrigação (com e sem déficit hídrico) sobre as trocas gasosas foliares e o crescimento de B. brizantha cv. MG-5 Vitória. O experimento foi realizado em casa-de-vegetação, com quatro repetições por tratamento, e a deficiência hídrica foi imposta por suspensão da irrigação em plantas com 50 dias de idade após a germinação. Um tratamento-controle foi mantido com...
Palavras-chave: 5.01.00.00-9 Agronomia Brachiaria brizantha; Crescimento; Fósforo; Deficiência hídrica; Trocas gasosas Brachiaria brizantha. growth; Phosphorus; Water deficit; Leaf gas exchange.
Ano: 2009
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/836

Efeito de sistemas de produção integração lavoura-pecuária (ILP) sobre a fertilidade do solo em plantio direto - DOI: 10.4025/actasciagron.v31i4.925
Provedor de dados: 1
Autores: Santos, Henrique Pereira dos; EMBRAPA; Fontaneli, Renato Serena; EMBRAPA; Spera, Silvio Tulio; EMBRAPA; Tomm, Gilberto Omar; EMBRAPA.
O objetivo deste estudo, empregando o delineamento de blocos casualizados, com quatro repetições, foi avaliar a fertilidade do solo no período de oito anos, num Latossolo Vermelho Distrófico típico, em Coxilha, RS, em seis sistemas de produção de grãos com pastagens anuais de inverno e de verão: I) trigo/soja e pastagem de aveia preta + ervilhaca/milho; II) trigo/soja e pastagem de aveia preta + ervilhaca + azevém/milho; III) trigo/soja e pastagem de aveia preta + ervilhaca/pastagem de milheto; IV) trigo/soja e pastagem de aveia preta + ervilhaca + azevém/pastagem de milheto; V) trigo/soja, aveia branca/soja e pastagem de aveia preta + ervilhaca/pastagem de milheto; e VI) trigo/soja, aveia branca/soja e pastagem de aveia preta + ervilhaca + azevém/pastagem...
Palavras-chave: 5.02.01.07-7    Solos Florestais matéria orgânica; Fósforo; Potássio; Integração lavoura-pecuária; Sistemas mistos 5.01.03.00-8    Fitotecnia organic matter; Phosphorus; Potassium; Lay farming; Mixed systems.
Ano: 2009
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/925

Export of N, P and K in barley subjected to fertilizer doses formulated with and without humic substance at sowing
Provedor de dados: 1
Autores: Oliveira, Kathia Szeuczuk de; Mendes, Marcelo Cruz; Ilibrante, Gustavo Arruda; Antoniazzi, Noemir; Stadler, Alan Junior; Antoniazzi, Ana Paula.
The aim of this study was to evaluate the effect of nitrogen fertilization with and without humic acid in barley cultivars on the export of nitrogen, phosphorus and potassium grains. The experiment was performed in the city of Guarapuava, PR, during the 2015 and 2016 growing seasons. The experimental design was in RCB in factorial 5 x 2, with the following sowing fertilization (kg ha-1): 0, 100 NPK, 100 NPK+HS, 250 NPK, 250 NPK+HS and two cultivars, BRS Brau and BRS Elis. The dose of 250 kg NPK with humic substance increased the nitrogen export to barley grains, with the highest levels occurring in the BRS Brau cultivar under favorable climatic conditions. Under favorable climatic conditions, the export of phosphorus to barley grains in the agricultural...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Hordeum vulgare; NPK fertilizer; Nitrogen; Phosphorus; Potassium.
Ano: 2019
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/42690

Teor de fitato e proteína em grãos de feijão em função da aplicação de pó de basalto - doi: 10.4025/actasciagron.v33i1.5878
Provedor de dados: 1
Autores: Silva, Alinne da; Centro de Energia Nuclear na Agricultura/USP; Pereira, Tamara; Universidade do Oeste da Santa Catarina - Campus de Videira, UNOESC; Coelho, Cileide Maria Medeiros; Universidade do Estado de Santa Catarina, UDESC; Almeida, Jaime Antonio de; Universidade do Estado de Santa Catarina, UDESC; Schmitt, Catiline; Universidade do Estado de Santa Catarina, UDESC.
O teor de fitato nos grãos está correlacionado com o suprimento de fósforo à planta, porém não se sabe quanto este teor responde à disponibilidade mais lenta do nutriente no solo. O objetivo deste trabalho foi avaliar o efeito do pó de rocha, isolado ou combinado com esterco bovino, sobre: produtividade, teores de proteína, fósforo e fitato nos grãos de feijão. O experimento foi conduzido sob delineamento inteiramente casualizado, com quatro repetições. Em todas as parcelas, exceção ao tratamento com adubação convencional, foram adicionados pó de granito e fosfato natural. Os tratamentos foram constituídos de testemunha, adubação convencional, pó de basalto (2,5; 5,0; 10,0 e 20,0 t ha-1), esterco bovino e as mesmas doses de pó de basalto associadas com...
Palavras-chave: 5.01.00.00-9 Antinutriente; Pó de rocha; Fósforo Agronomia Antinutrient; Rock powder; Phosphorus.
Ano: 2011
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/5878

Composição corporal e exigências de macrominerais para ganho de peso de caprinos em pastejo - DOI: 10.4025/actascianimsci.v31i1.4797
Provedor de dados: 2
Autores: Nóbrega, Giovanna Henriques da; UFCG; Silva, Aderbal Marcos de Azevêdo; UFCG; Pereira Filho, José Morais; UFCG; Azevedo, Solange Absalão; UFCG; Silva, Guilherme de Lira Sobral; UFCG; Alcalde, Claudete Regina; UEM.
Este trabalho teve como objetivo estimar a composição corporal e exigências nutricionais em macrominerais para ganho de peso de cabritos &amp;frac12; Boer &amp;frac12; SRD, na fase de crescimento, em pastejo na região semiárida. O experimento foi desenvolvido na fazenda ‘Nupeárido’, no município de Patos, Estado da Paraíba. Foram utilizados 24 cabritos com peso corporal médio inicial de 15 kg, em pastejo, distribuídos em quatro tratamentos com níveis crescentes de suplementação concentrada (0; 0,5; 1,0 e 1,5% do peso corporal). Os animais, mantidos em sistema de semiconfinamento, receberam suplementação alimentar, em baias individuais, ao serem recolhidos diariamente. Quando um dos animais de cada grupo atingia 30 kg de peso corporal, todos os demais...
Palavras-chave: 5.04.00.00-2 Zootecnia cabritos; Cálcio; Fósforo; Potássio; Sódio; Semiárido Exigências Nutricionais dos Animais kid goats; Calcium; Phosphorus; Potassium; Sodium; Semi-arid.
Ano: 2009
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/4797

Phytase in diets with crude protein levels for commercial layers
Provedor de dados: 2
Autores: Pereira, Adriana Aparecida; Junqueira, Otto Mack; Griep Junior, Dirceu Neutzling; Lima Júnior, Dorgival Morais de; Sgavioli, Sarah; Morais, Socorro.
 The aim of this study was to evaluate the action of the phytase enzyme in diets formulated with variations in the crude protein content on performance and egg quality of commercial layers. A total of 336 commercial layers were housed at eight birds per cage in a 3 × 2 factorial arrangement with seven replicates. Treatments consisted of four crude-protein levels (17, 15, and 13%) and two enzyme levels (0 and 500 FTU kg-1 diet), distributed in a completely randomized design. Feed intake, egg production, feed conversion per dozen eggs and per kilogram, egg weight and mass, specific gravity, eggshell thickness, and Haugh unit were measured over five 28-day periods. The performance of commercial layers fed the diet containing 13% crude protein worsened,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Phosphorus; Chicken; Nitrogen; Eggs.
Ano: 2017
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/33097

Mass balance of nutrients during the filling phase of two reservoirs of Sistema Produtor Alto Tietê (SPAT) - doi: 10.4025/actascibiolsci.v33i1.7313
Provedor de dados: 3
Autores: Cope, Valéria; Instituto de Pesca - APTA - SAA - SP; Mercante, Cacilda Thais Janson; Instituto de Pesca - APTA - SAA - SP; Carmo, Clovis Ferreira do; Instituto de Pesca - APTA - SAA - SP; Sendacz, Suzana; Instituto de Pesca - APTA - SAA - SP; Monteiro Junior, Adalberto José; Instituto de Pesca - APTA - SAA - SP.
Paraitinga and Biritiba reservoirs are part of Sistema Produtor Alto Tietê and they play an important role at the public water supply. The purpose of this study is to understand the mass balance of nitrogen and phosphorus that can influence the eutrophication process in reservoirs during the filling phase, and provide information for the implementation of mechanisms to manage water quality. Water samples were collected from August 2005 until May 2006. Concentrations of total phosphorus (PT) and total nitrogen (NT) were measured and the mass balance and loads were estimated. Paraitinga reservoir presented retention of NT and PT during the dry season and export during the rainy season; whilst at Biritiba reservoir we evidenced retention of NT and PT for both...
Tipo: Balanço de massa
Palavras-chave: 2.05.02.00-1 water supply; Nitrogen; Phosphorus Ecologia de Ecossistemas water supply; Nitrogen; Phosphorus.
Ano: 2011
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/7313

Preliminary analysis on the use of Trophic State Indexes in a brazilian semiarid reservoir
Provedor de dados: 3
Autores: Lima, Paulo de Freitas; Sousa, Mart Som Reis; Porfírio, André Ferreira; Almeida, Beatriz Soares; Freire, Rogério Herlon Furtado; Santaella, Sandra Tédde.
The Carlson’s (1977) Trophic State Index (TSI) is a widely employed tool to estimate the degree of eutrophication in a reservoir. In Brazil, the need of a classification system that would take into account regional characteristics employed adjusted indexes generated by data from reservoirs in the southeastern region of the country. Current research compares responses for Carlson’s TSI (1977) and its derivations for Brazilian reservoirs from data collected in the Pereira de Miranda Reservoir (State of Ceará, Brazil), and analyzes the influence of local conditions on results and their applicability to reservoirs in the semiarid region. TSIs were calculated by data on total phosphorus, chlorophyll a and water transparency. The reservoir was estimated as...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ciências biológicas; Ecologia (2.05.00.00-9) hydro-climatic conditions; Eutrophication; Limiting nutrient; Phosphorus; Nitrogen; Chlorophyll a Ecologia de ecossistemas (2.05.02.00-1).
Ano: 2015
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/27160

Influence of a net cage tilapia culture on the water quality of the Nova Avanhandava reservoir, São Paulo State, Brazil - doi: 10.4025/actascibiolsci.v34i3.7298
Provedor de dados: 3
Autores: Mallasen, Margarete; Instituto de Pesca; Barros, Helenice Pereira de; Instituto de Pesca; Traficante, Daniela Polizeli; Estadual Paulista “Julio de Mesquita Filho”; Camargo, André Luiz Scarano; Escama Forte Aquacultura e Meio Ambiente Ltda.
In order to understand the influence of a net cage tilapia culture on the environment, water quality parameters were investigated during the period between December, 2005 and November, 2007. Three sampling stations were established in the reservoir of Nova Avanhandava (Zacarias, São Paulo State) as follows: upstream of net cage area (P1), in the rearing place (P2) and downstream of net cage area (P3). The mean values of the parameters examined in the water sampling stations were within the standards of water quality recommended by resolution no. 357/2005 of the Conselho Nacional do Meio Ambiente for class 2 freshwater bodies. A significantly higher mean concentration of total phosphorus (p &amp;lt; 0.05) in the P2 (0.035 mg L-1) was the result of the...
Tipo: Estudo da qualidade de água
Palavras-chave: 5.06.02.01-2 limnology; Phosphorus; Nutrients; Intensive fish farming; Tilapia Fatores abióticos de águas interiores.
Ano: 2012
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/7298

Azospirillum lipoferum and nitrogen fertilization effect on chlorophyll content, nutrients uptake and biometric properties of Zea mays L.
Provedor de dados: 115
Autores: Davaran-Hagh,Elnaz; Mirshekari,Bahram; Reza-Ardakani,Mohammad; Farahvash,Farhad; Rejali,Farhad.
Integrated nutrient management is a major agronomic practice which brings together all methods to support plants nutritional requirement. However, the interaction of these methods together is very complex and needs to be studied in different climatic conditions. So, the effect of nitrogen fertilizer and Azospirillum lipoferum inoculation on maize (Zea mays L.) growth, yield and nutrients uptake was determined in this study. The hypothesis was that the bacterial inoculation decreases the need for N fertilizer application without reducing plant yield. Therefore, we carried out a factorial experiment in a randomized complete block design with three replications. Nitrogen at 0, 25, 50, 75 and 100 % concentrations of the recommended dose, i.e. 150 kg N ha-1...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biofertilizer; Iron; Nitrogen; Phosphorus; Zinc.
Ano: 2015
URL: http://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S1405-31952015000800006

Osmotic stress induced by polyethylene-glycol alters macronutrient concentrations in sugarcane (Saccharum spp.) plants in vitro
Provedor de dados: 115
Autores: Castañeda-Castro,Odón; Gómez-Merino,Fernando C.; Trejo-Téllez,Libia I.; Pastelín-Solano,Miriam C.
The potential capacity of plant roots to absorb water and nutrients generally declines in osmotic-stressed plants, presumably because of a reduction in the nutrient element demand, and such decrease varies among plant genotypes. In order to investigate the effect of the osmotic stress caused by polyethylene-glycol 6000 (PEG) on the macronutrient concentration in sugarcane (Saccharum spp.) in vitro, we established a factorial experiment with a completely randomized distribution. Study factors were variety (Mex 69-290 and CP 72-2086) and PEG in the nutrient medium (0, 3, 6 and 9 %, to generate osmotic potential corresponding to -0.18, -0.45, -0.65 and -0.80 MPa, respectively), which resulted in eight treatments, with five replicates each. The experimental...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Plant nutrition; Poaceae; PEG; Nitrogen; Phosphorus; Potassium.
Ano: 2015
URL: http://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S1405-31952015000800004

Nutritional quality of phaseolin types and morphotypes of green bean (Phaseolus vulgaris L.)
Provedor de dados: 115
Autores: Carović-Stanko,Klaudija; Maloić,Mario; Pintar,Jasna; Liber,Zlatko; Radosavljević,Ivan; Bedeković,Dalibor; Guberac,Sunčica; Očić,Vesna; Lazarević,Boris.
Abstract The long tradition of green bean (Phaseolus vulgaris L.) cultivation in Croatia has resulted in the development of a landraces adapted to specific areas and chosen to suit different dietary habits. The hypothesis of our study was that nutritional quality (content of proteins, sugars, fibres, calcium, potassium and phosphorus in fresh pods) of 14 widely grown Croatian green bean accessions is affected by origin and morphotype. The analysed accessions were grown in non-replicated field plots where morphotypes were classified. The gene pool of adscription (Andean vs. Mesoamerican) of each accession was determined with the phaseolin marker, whereas nutritional quality traits were analysed according to standard analytical methods. The relationships...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Crude protein; Gene pool; Growth habit; Functional food; Phosphorus; Potassium.
Ano: 2018
URL: http://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S1405-31952018000400523

Plant- and microbial-based mechanisms to improve the agronomic effectiveness of phosphate rock: a review
Provedor de dados: 42
Autores: Arcand,Melissa M.; Schneider,Kim D.
Deficiency in plant-available phosphorus is considered to be a major limiting factor to food production in many agricultural soils. Mineral resources are necessary to restore soil phosphorus content. In regions where conventional fertilizers are not used due to cost limitations or to mitigate adverse environmental effects, local sources of phosphate rock are being increasingly recognized for potential use as alternative phosphorus fertilizers. The main obstacle associated with using directly applied ground phosphate rock is that the phosphate released is often unable to supply sufficient plant-available phosphorus for crop uptake. Plantand microbial-based mechanisms are low-cost, appropriate technologies to enhance the solubilization and increase the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Agriculture; Microorganisms; Phosphate rock; Phosphorus; Rhizosphere; Solubilization.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652006000400013

Evaluation of an inexpensive needle test for the diagnosis of phosphorus deficiency and management of phosphorus supplementation for cattle: A multiple case study
Provedor de dados: 42
Autores: MALAFAIA,PEDRO; GARCIA,FELIPE Z.; LOPES,SAMARA P.; SOUZA,VINÍCIUS C.; CANELLA FILHO,CAMILLO F.C.; COSTA,DIOGO F.A.; VEIGA,CRISTIANO C.P.
ABSTRACT The needle test (NT) is a point-of-care test developed in Brazil to evaluate the Phosphorus (P) status in cattle. Based on bone resistance, the NT is a very inexpensive method which allows the diagnosis of any degree of P deficiency in a fast and simple way in vivo and directly on farm. The NT measures three levels of resistance in the transverse process (TP) of the lumbar vertebrae: a) TP that are impenetrable and result in warping of the needle (P healthy animals); b) TP offering some resistance to the penetration (animals with subclinical P deficiency); and c) TP which has minimal resistance to penetration (clinical P deficiency). This manuscript presents results from a series of case studies to evaluate the hypothesis that the NT could be used...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Beef and dairy cattle; Phosphorus; Mineral deficiency; Mineral supplementation.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000703337

Effect of inoculation associated to leaf sprayed Co+Mo on the yield and grain nutrients in common bean (Phaseolus vulgaris L)
Provedor de dados: 52
Autores: Berton Junior,João Francisco; Santos,Julio Cesar Pires; Coelho,Cileide Maria Medeiros; Klauberg Filho,Osmar.
The objective of this work was to evaluate the efficiency of nitrogen fixing inoculum associated with Co + Mo leaf spray on the common bean grain yield and grain nutrients, cv. FT Nobre. Three dosages of the inoculant (0, 200 and 400 g/50 kg seeds), combined with four Co + Mo leaf spray levels (T0=0,0; T1=4.9,49; T2=7.3,73; and T3=9.7,97 g ha-1 of Co and Mo, respectively) were tested. The grain yield with the use of the inoculant (400 g / 5O kg seed-1) associated with the higher level of Co+Mo (T2 and T3) was very similar to the mineral nitrogen condition fertilizer recommended for the bean (70 kg ha-1 of N). With the increased inoculant dosage, an increase of the protein content and of P and Mg in the grain was also observed. The results indicated that...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Seed quality; Phosphorus; Magnesium; Nitrogen.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132008000600002

Dissolved Nitrogen and Phosphorus Dynamics in the Lower Portion of the Paraiba do Sul River, Campos dos Goytacazes, RJ, Brazil
Provedor de dados: 52
Autores: Silva,Mônica Aparecida Leite; Calasans,Claudia Ferreira; Ovalle,Alvaro Ramon Coelho; Rezende,Carlos Eduardo.
The Paraíba do Sul river lower reach was monitored monthly between August 1995 and July 1996. This study was aimed at evaluating the temporal dynamics of dissolved nitrogen and phosphorus and its main controlling factors. Minimum and maximum observed values were as follows: N-NO2- - 0.08/0.51; N-NO3- - 21/57; N-NH4+ - 1.4/6.7; DON - 4.9/86.0; DIN -24.5/60.9; P-PO4(3-) - 0.43/1.66; DOP - 0.05/0.92; pH - 6.2/7.8; Dissolved Oxygen - 6.4/10.1; Conductivity - 48/74; Temperature - 20.5/31.1 (Nutrients - µM; Dissolved Oxygen - mg/l; Conductivity - µS/cm; Temperature - °C). Discharge presented a characteristic seasonal variation, showing a peak in January. Increasing P-PO4(3-), DOP, N-NH4+ and N-NO2- concentrations with increasing discharges could be associated to...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Dissolved nutrients; Paraíba do Sul River; Temporal dynamics; Nitrogen; Phosphorus; Discharge.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132001000400006

Phosphorus collectors from filter paper and synthetic cloth coated with iron or aluminium oxide to provide phosphorus by diffusion in soils
Provedor de dados: 52
Autores: Luchese,Eduardo Bernardi; Lenzi,Ervim; Favero,Luzia Otília Bortotti; Loubak,Luceide Heloisa.
Phosphorus collectors made from filter paper and synthetic cloth, were tested to evaluate their feasibility of determining the need for phosphate application. The collectors were coated with two types of oxides, iron oxide and aluminium oxide. The capacity of the collectors was tested by placing them in a 2 mL of solution containing phosphorus (PO4(3-)) in the concentration of 0.0, 1.00, 3.00, 5.00, 7.00, 9.00 and 11.00 µ g.mL-1, respectively, after which they were placed in contact with four types of soil (LBa, LRd, LEd and Ca) and incubed for 0.0 and 24 h. In this test the soils were kept at a humidity equivalent to 150 mmHg suction. The amount of phosphorus extracted from the solutions was tested at intervals between 0,0 and 11.0 µ g of phosphorus/mL....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Phosphorus; Phosphorus availability; Phosphorus diffusion; Phosphorus extraction.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132000000200006

Variation in phytate accumulation in common bean (Phaseolus vulgaris L.) fruit explants
Provedor de dados: 52
Autores: Coelho,Cileide Maria Medeiros; Bellato,Cláudia Mattos; Garcia,Andréia Karime Marcelino; Vitorello,Victor Alexandre; Azevedo,Ricardo Antunes.
The in vitro synthesis of phytate was studied in common bean fruit explants. Different concentrations of sucrose; phosphorus (P); myo-inositol; abscisic acid (ABA); glutamine and methionine, were tested. Fixed concentrations of these compounds were tested at different periods (0, 3, 6 and 9 days). Variation in phytate coincided with different concentrations of sucrose, myo-inositol, P and ABA for the duration tested. These compounds caused an accumulation of phytate and were more effective in the presence of myo-inositol and P. The accumulation of P varied less than phytate for the different treatments tested in vitro. In conclusion, P, sucrose, ABA, and myo-inositol caused an increase in the phytate of bean seed, showing that it could be possible to alter...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Abscisic acid; Glutamine; Phosphorus; Phytic acid; Sucrose.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132008000100020

Trophic state and microorganisms community of major sub-basins of the middle Rio Doce basin, southeast Brazil
Provedor de dados: 52
Autores: Petrucio,Mauricio Mello; Medeiros,Adriana Oliveira; Rosa,Carlos Augusto; Barbosa,Francisco Antônio Rodrigues.
Total phosphorus concentration was used to define the trophic state of the main sub-basins of the middle Rio Doce, in Minas Gerais State (southeast Brazil) and physical, chemical, and microbiological variables of water were analyzed during 2000 to 2001. The study evaluated changes in water quality caused by seasonality and human activities. Water temperature, conductivity, pH, total alkalinity, dissolved oxygen, and concentrations of NH4-N, NO2-N, NO3-N, total-N, PO4-P, total-P, DOC, and chlorophyll-a were measured in seven rivers stretches (sampling stations). Total yeasts, faecal and total coliforms, and heterotrophic bacteria were also determined. The studied areas were considered to be under oligotrophic to eutrophic conditions. The variables that...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Microorganisms; Phosphorus; Rivers; Trophic state.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132005000500015

Research on Phosphorus Removal in Artificial Wetlands by Plants and Their Photosynthesis
Provedor de dados: 52
Autores: Quan,Quan; Shen,Bing; Zhang,Qian; Ashraf,Muhammad Aqeel.
ABSTRACT Urban rainfall runoff pollution has become a major reason for water eutrophication problem in the process of urbanization in China, while phosphorus is a significant restrictive factor that influences primary productivity of freshwater system. It's rather significant to conduct phosphorus control in waste water with engineering measures. This research, based on material balance research of phosphorus in artificial wetlands, HRT (hydraulic retention time) and analysis of wetland plant photosynthesis and removal rate of phosphorus, simulates purification of phosphorus in urban runoff sewage by artificial wetland system. Experiment shows that removal rate of total phosphorus in urban runoff sewage by artificial wetland system reaches 42.23%-60.89%,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Artificial Wetlands; Plants; Photosynthesis; Phosphorus.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132016000200701

Influence of photoperiod on the uptake of nitrogen and phosphorus in the water by Eichhornia crassipes and Salvinia auriculata
Provedor de dados: 57
Autores: PETRUCIO,M. M.; ESTEVES,F. A.
The main goal of this research was to quantify the concentrations of total and ammonium N, nitrate, total and soluble P in the water in the presence of Eichhornia crassipes and Salvinia auriculata, which were submitted to two different photoperiods in a 24 hours incubation period in the laboratory. The macrophytes were incubated in plastic vials of approximately 1.5 litters, with a previously prepared solution with NH4NO3, NH4Cl, and KH2PO4. Eichhornia crassipes showed the highest average rate of reduction of all the nutrients analysed in relation to Salvinia auriculata. The largest photoperiod reflected in a higher average rate of reduction of nutrients, in both plants. Therefore, we may expect that in some periods of the year (e.g. summer), the aquatic...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Eichhornia crassipes; Aquatic macrophytes; Nitrogen; Phosphorus; Salvinia auriculata.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71082000000300002

Uptake rates of nitrogen and phosphorus in the water by Eichhornia crassipes and Salvinia auriculata
Provedor de dados: 57
Autores: PETRUCIO,M. M.; ESTEVES,F. A.
The main goal of this research was to survey information about the physiology of Eichhornia crassipes and Salvinia auriculata and their capacity to remove nitrogen and phosphorus from the environment, after quantifying the concentrations of the nitrogen (NO3-N, NH4-N and total-N) and phosphorus (PO4-P and total-P) compounds in the water. The macrophytes were incubated in the laboratory in plastic vials of approximately 1.5 litters containing a previously prepared solution of NH4NO3, NH4Cl and KH2PO4. Eichhornia crassipes exhibited the highest rates of nutrient reduction and the concentrations of NO3-N, NH4-N and PO4-P in the water influenced the uptake rates of nitrogen and phosphorus of the E. crassipes and S. auriculata. This information can help to...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aquatic macrophytes; Eichhornia crassipes; Nitrogen; Phosphorus; Salvinia auriculata.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71082000000200006

Effect of arbuscular mycorrhizal fungi on young vines in copper-contaminated soil
Provedor de dados: 58
Autores: Ambrosini,Vítor Gabriel; Voges,Joana Gerent; Canton,Ludiana; Couto,Rafael da Rosa; Ferreira,Paulo Ademar Avelar; Comin,Jucinei José; Melo,George Wellington Bastos de; Brunetto,Gustavo; Soares,Cláudio Roberto Fonsêca Sousa.
Abstract High copper (Cu) levels in uprooted old vineyard soils may cause toxicity in transplanted young vines, although such toxicity may be reduced by inoculating plants with arbuscular mycorrhizal fungi (AMF). The objective of this study was to evaluate the effects of AMF on the plant growth, chlorophyll contents, mycorrhizal colonization, and Cu and phosphorus (P) absorption in young vines cultivated in a vineyard soil contaminated by Cu. Commercial vineyard soil with high Cu levels was placed in plastic tubes and transplanted with young vines, which were inoculated with six AMF species (Dentiscutata heterogama, Gigaspora gigantea, Acaulospora morrowiae, A. colombiana, Rhizophagus clarus, R. irregularis) and a control treatment on randomized blocks...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Mycorrhizae; Trace elements; Phosphorus; Vitis sp.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822015000401045

Dominance of Paris-type morphology on mycothallus of Lunularia cruciata colonised by Glomus proliferum
Provedor de dados: 58
Autores: Fonseca,Henrique M.A.C.; Ferreira,Joana I.L.; Berbara,Ricardo L.L.; Zatorre,Natalia P.
Microscopic evidence confirms that L. cruciata hosting G. proliferum shows major anatomical traits (arbuscules, coils, arbusculate coils and vesicles) generally associated arbuscular mycorrhizal roots and the anatomical morphology of intra-thalli mycelium is predominantly of the Paris-type. Colonised L. cruciata showed a reduction of biomass when compared with axenic plants suggesting a drain of resources towards the fungus and depletion of nutrients required for optimum plant growth. The behaviour of mycothalli regarding available KH2PO4 indicates that the nutritional stress threshold for phosphorus (P) is above the residual amount of P already present in PhytagelTM and in plant inoculum. These raise the possibility that in certain circumstances the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Arbuscular mycorrhizal fungi; Phosphorus; Arum-type; Liverwort; Monoxenic cultures.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822009000100016

Solubilization of CaHPO4 and AlPO4 by Aspergillus niger in culture media with different carbon and nitrogen sources
Provedor de dados: 58
Autores: Barroso,Cinthya Babá; Pereira,Gener Tadeu; Nahas,Ely.
The solubilization of inorganic phosphates by microorganisms supplies phosphates for plant nutrition and increases their growth. The solubilization of CaHPO4 (Ca-P) and AlPO4 (Al-P) by Aspergillus niger using several carbon and nitrogen sources was studied. Solubilization of Ca-P was enhanced when the carbon sources were mannitol, maltose, galactose and glucose (in that order). Galactose, sucrose and maltose were the carbon sources that enhanced the solubilization of Al-P. More extensive growth, acid production, and decrease in pH were obtained in the Al-P medium than in the Ca-P medium, however, the quantity of solubilized phosphate was 12% less. Phosphate solubilization was related to acid production, pH drop and fungal growth in the culture medium. The...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Nutrition; Phosphorus; Phosphate source; Phosphate solubilization; Titratable acidity.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822006000400006

Mycorrhiza influence on maize development under Cd stress and P supply
Provedor de dados: 61
Autores: Andrade,Sara A. L. de; Silveira,Adriana P. D. da.
The role of arbuscular mycorrhizal fungi (AMF) on cadmium (Cd) accumulation and on the possible attenuation of Cd stress was studied in maize plants (Zea mays L. var. Exceller). Plants inoculated or not with Glomus macrocarpum were exposed to Cd (0-20 µmol L-1), at two P levels (5 and 10 mg L-1) in the nutrient solution. The experiment was conducted in a hydroponic system, using a randomized 2 x 2 x 2 factorial design. The mycorrhiza-Cd interaction on plant growth, nutrients and Cd accumulation, AMF root colonization and on extra-radical mycelium was investigated. Mycorrhiza promoted plant growth whereas Cd addition reduced plant biomass production. No difference in plant Cd concentrations was found between mycorrhizal (M) and non-mycorrhizal (NM) plants,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Arbuscular mycorrhizal fungi; Cd distribution; Extra-radical mycelium; Heavy metals; Peroxidase; Phosphorus.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202008000100005

Phosphate Fertilization Can Increase Yield of Productive Grass Pea (Lathyrus sativus L.) Crops in P-Retentive Soils
Provedor de dados: 117
Autores: Montenegro,Adolfo; Mera,Mario.
The effect of P fertilization on grass pea (Lathyrus sativus L.) yield and yield components was evaluated on soils with low P availability and high P retention capacity in small-scale farms of the Araucanía Region in southern Chile. Trials were conducted during 2000-2001, 2001-2002, and 2002-2003, in six sites; three sites in Lumaco and three in the Selva Oscura area. Six rates of P (0, 21.8, 43.6, 65.4, 87.2, and 109.0 kg ha-1) were evaluated in a randomized complete block design with four replicates. Grass pea cv. Luanco-INIA was sown at 47 seeds m-2. Mean grain yield for all trials was 2456 kg ha-1. Phosphate fertilization increased grass pea grain yield in both areas during 2000 and 2001. There was no significant effect in 2002. The 2002 cropping...
Tipo: Journal article
Palavras-chave: Grass pea; Phosphorus; Neglected crops; Cool-season legumes.
Ano: 2009
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392009000200014

Availability of Nitrogen, Phosphorus and Potassium from Poultry Litter and Conventional Fertilizers in a Volcanic Soil Cultivated with Silage Corn
Provedor de dados: 117
Autores: Hirzel,Juan; Walter,Ingrid.
Poultry litter (PL) is an organic matter source used as soil amendment. Besides its important nutrient content, it is a cheap alternative to conventional fertilizers in crop production. The efficient use of PL also helps reduce the environmental problems normally associated with its disposal near poultry production farms. This article reports the relative effects of PL and conventional fertilizers on the availability of soil N, P and K, dry matter (DM) production and total nutrient content in silage corn (Zea mays L.). The field experiment was carried out in a soil derived from volcanic ash (Tipic Melanoxerands) of Central South Chile. Corn was grown for three seasons (2002-2005) and PL and conventional fertilizers were applied in the first two years. The...
Tipo: Journal article
Palavras-chave: Poultry litter; Soil fertility; Corn; Nitrogen; Phosphorus; Potassium.
Ano: 2008
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392008000300006

Potassium and Phosphorus in Muscat Rosada Grape Yield in Elqui Valley Soil
Provedor de dados: 117
Autores: Sierra B,Carlos; Alfaro P,Rubén.
The effects of P and K on grapevines (Vitis vinifera L.) var. Muscat Rosada were evaluated four years, considering the same levels of N. The experiment was conducted at the Vicuña Experimental Station (30° S; 70°44´ W) of the Instituto de Investigaciones Agropecuarias (INIA). The soil is alluvial antropic miscellaneous (Entisols). Three fertilization treatments were established: 1) N 160 + P2O5 200 + K2O 300; 2) N 160 + P2O5 0 + K2O 300; and 3) N 160 + P2O5 200 + K2O 0. At the beginning of the experiment, grape vines received all the phosphate fertilizers, 200 kg ha-1 of P2O5 as triple superphosphate in Treatments 1 and 3. Nitrogen was applied as urea for four years. The applications were initiated when the vine buds measured 20 cm. The K was applied to...
Tipo: Journal article
Palavras-chave: Grapes; Fertilization; Phosphorus; Potassium.
Ano: 2008
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392008000300010

The influence of N and P supply and genotype on N remobilization in containerized Pinus radiata plants
Provedor de dados: 118
Autores: Bown,Horacio E; Watt,Michael S; Clinton,Peter W; Mason,Euan G.
A large proportion of the nitrogen (N) used in the current-year growth of the widely grown plantation species Pinus radiata D. Don is N that was stored in plant tissues the previous year. However, the extent to which an imbalance between levels of phosphorus (P) and N may change the capacity of plants to remobilize N is unknown. In this study, the N remobilization responses of four P. radiata genotypes to a factorial combination of N and P additions were assessed in containerized plants in a two-year greenhouse experiment. N supply was enriched with 15N at 2.5%o(labeled N) during the first year. Plants were then transferred to clean sand and grown for another year with 15N at levels close to natural levels (0.3664899 atom percent 15N, &amp;#948;15N...
Tipo: Journal article
Palavras-chave: Genotypes; Nitrogen; Nutrient remobilization; Phosphorus; Pinus radiata.
Ano: 2012
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202012000300010

Soil C/N influences the carbon flux and partitioning in control and fertilized mini-plots of Pinus radiata in New Zealand
Provedor de dados: 118
Autores: Bown,Horacio E; Watt,Michael S; Clinton,Peter W; Mason,Euan G.
Patterns of carbon flux and partitioning were examined in highly stocked (40,000 stems ha-1) control and fertilized mini-plots of Pinus radiata D. Don at five sites, which covered a wide climatic and edaphic gradient on the South Island of New Zealand. The gross-primary productivity (GPP) and the partitioning of the GPP to the above- and below-ground productivity and respiration were determined using a carbon budget approach. All of the components of the GPP, the above-ground net primary productivity (ANPP [r² = 0.67, P &amp;#8804; 0.01]), above-ground plant respiration (APR [r² = 0.66, P &amp;#8804; 0.01]), and total below-ground carbon flux (TBCF [r² = 0.41, P &amp;#8804; 0.01]) significantly increased with the GPP, but the ANPP:GPP, APR:GPP and TBCF:GPP...
Tipo: Journal article
Palavras-chave: Gross- primary productivity; Net-primary productivity; Nitrogen; Pinus radiata D. Don; Phosphorus; Total below-ground carbon flux; Whole carbon budget.
Ano: 2011
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202011000200013

Phosphorus reduction by sifting fish waste meal
Provedor de dados: 65
Autores: Lima,Ronaldo Lima de; Enke,Dariane Beatriz Schoffen; Braun,Neiva; Fracalossi,Débora Machado.
Fish meal is widely included in animal feed because it contains ideal essential amino acids profile, it is rich in energy, essential fatty acids, vitamins and minerals and with &gt;80% apparent protein digestibility in peneid shrimp. In human nutrition, studies are investigating the inclusion of fish meal in snacks, cakes, breads and cookies, as an enrichment in calcium, phosphorus, iron, protein and, especially, omega-3 fatty acids. Omega-3 fatty acids reduces heart diseases and have antithrombotic and anti-inflammatory properties (eicosapentaenoic acid), and are essential to the formation of brain tissue and retina in infants and are important during pregnancy and lactation (docosahexaenoic acid). Fish meal produced from fish waste is rich in minerals...
Tipo: Info:eu-repo/semantics/report
Palavras-chave: Phosphorus; Fish waste meal; Fractionation; Sieves.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782014001001841