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| Registros recuperados: 40 | |
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| Bautista Cruz, María Teresa. |
| Con el objeto de estudiar la absorción nutrimental y determinar el potencial osmótico (PO) de la solución nutritiva, óptimo para incrementar la calidad de fruto de chile manzano se desarrolló un experimento factorial en condiciones de hidroponía. Se evaluaron 5 niveles de PO: -0.036, -0.054, -0.072, -0.09 y -0.108 MPa, y dos variedades: Puebla y Zongolica. Se evaluó la concentración de macro y micronutrimentos en la planta, además de algunos aspectos de calidad del fruto como: peso medio del fruto, grosor del pericarpio en la parte del hombro del fruto, firmeza, sólidos solubles totales, ácido ascórbico y acidez titulable. Los frutos que presentaron mejores parámetros de calidad, fueron aquellos a los que se aplicó la solución nutritiva con PO desde... |
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Palavras-chave: Hidroponia; Macronutrimentos; Micronutrimentos; Soilless culture; Macronutrients; Micronutrients; Maestría; Edafología. |
| Ano: 2010 |
URL: http://hdl.handle.net/10521/153 |
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| Bautista Cruz, María Teresa. |
| Con el objeto de estudiar la absorción nutrimental y determinar el potencial osmótico (PO) de la solución nutritiva, óptimo para incrementar la calidad de fruto de chile manzano se desarrolló un experimento factorial en condiciones de hidroponía. Se evaluaron 5 niveles de PO: -0.036, -0.054, -0.072, -0.09 y -0.108 MPa, y dos variedades: Puebla y Zongolica. Se evaluó la concentración de macro y micronutrimentos en la planta, además de algunos aspectos de calidad del fruto como: peso medio del fruto, grosor del pericarpio en la parte del hombro del fruto, firmeza, sólidos solubles totales, ácido ascórbico y acidez titulable. Los frutos que presentaron mejores parámetros de calidad, fueron aquellos a los que se aplicó la solución nutritiva con PO desde... |
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Palavras-chave: Hidroponia; Macronutrimentos; Micronutrimentos; Soilless culture; Macronutrients; Micronutrients; Maestría; Edafología. |
| Ano: 2010 |
URL: http://hdl.handle.net/10521/153 |
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| 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 “sustainable use.” 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 |
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| Armindo,Robson A.; Coelho,Rubens D.; Teixeira,Marconi B.; Ribeiro Junior,Paulo J.. |
| This study aimed to evaluate the spatial variability of leaf content of macro and micronutrients. The citrus plants orchard with 5 years of age, planted at regular intervals of 8 x 7 m, was managed under drip irrigation. Leaf samples were collected from each plant to be analyzed in the laboratory. Data were analyzed using the software R, version 2.5.1 Copyright (C) 2007, along with geostatistics package GeoR. All contents of macro and micronutrients studied were adjusted to normal distribution and showed spatial dependence.The best-fit models, based on the likelihood, for the macro and micronutrients were the spherical and matern. It is suggest for the macronutrients nitrogen, phosphorus, potassium, calcium, magnesium and sulfur the minimum distances... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Citrus latifolia Tan.; Macronutrients; Micronutrients; Geostatistics. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162012000300007 |
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| Fia,Ronaldo; Boas,Regina B. Vilas; Campos,Alessandro T.; Fia,Fátima R. L.; Souza,Edson G. De. |
| This work aimed to study the agronomic performance and capacity of nutrient removal by bermudagrass (Cynodon spp.) and cattail (Typha sp.) when grown in constructed wetlands systems (CWSs) of vertical and horizontal flow, respectively, used in the post-treatment of swine breeding wastewater (ARS). The average yield of dry matter (DM) of bermudagrass in sections of 60-day interval ranged from 14 to 43 t ha-1, while the cultivated cattail produced in a single cut after 200 days of cultivation between 45 and 67 t ha-1 of DM. Bermudagrass extracted up to 17.65 kg ha-1 d-1 of nitrogen, 1.76 kg ha-1 d-1 of phosphorus, 6.67 g ha-1 d-1 of copper and 54.75 g ha-1 d-1 of zinc. Cattail extracted up to 5.10 kg ha-1 d-1 of nitrogen, 1.07 kg ha-1 d-1 of phosphorus, 1.41... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Macronutrients; Micronutrients; Effluent treatment. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162014000100013 |
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| Sánchez,Esteban; Soto-Parra,Juan Manuel; Preciado-Rangel,Pablo; Llanderal,Alfonso; Lao,María Teresa. |
| ABSTRACT The objective of this study was to compute and compare DRIS norms for grafted and non-grafted red bell pepper crops grown in semi arid climate conditions. DRIS norms were computed with 84 samples of first young mature leaves collected during developed stage. The experiment had a completely randomized block design, and the values obtained for each plant and each variable were considered as independent replicates. Thirty-two DRIS norms nutrient ratios and coefficients of variation (CV) were computed from N, P, K, Ca, Mg, Fe, Cu, Zn and Mn analytical results. The ratios P/N and K/N in grafted and non-grafted pepper plants, showed low CV and therefore may play a fundamental role in crop production according with the DRIS norms calculated, since as... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Capsicum annuum; Diagnostic and Recommendation Integrated System; Foliar diagnostic; Leaf analysis; Nutrient ratio; Macronutrients. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362018000300371 |
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| Matsumoto,Sylvana N; Araujo,Germano da S; Viana,Anselmo Eloy S. |
| The objective of this study, carried out from October to December 2006, was to analyze the effects of increasing doses of nitrogen (N) and potassium (K) as well as the interaction between these elements on the growth of sweet basil plants cultivated under field conditions. The experimental design was split plots, holding in the main plots the N doses and in the subplots the K rates. Doses of 0, 50, 100 and 150 kg ha-1 were established for N and K, applied as urea and potassium chloride, respectively. The seedlings were transplanted to beds, in 40 x 30 cm spacing, and each plot had 24 plants. The evaluations at 45 days after transplanting detected no effect of N levels in stem diameter, Spad index and number of internodes. A quadratic polynomial model was... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ocimum basilicum; Macronutrients. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362013000300024 |
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| Cardoso,Jean C; Ono,Elizabeth O. |
| One of the most important applications of plant tissue culture is mass propagation of ornamental plants. This experiment evaluated the effect of different concentrations of NH4NO3 and KNO3 and BAP on the in vitro growth of orchid hybrid Brassocattleya 'Pastoral'. Seedlings of this orchid hybrid were used as explants and cultivated in medium with mineral salts and vitamins from the MS medium (Murashige & Skoog, 1962), with the macronutrients P, Ca and Mg reduced by half, and with an addition of 25 g L-1 of sucrose, 0.1 g L-1 of myo-inositol and 1.5 g L-1 of activated charcoal. Agar-agar was added (6.5 g L-1) and the pH was adjusted to 5.8. As treatments, four concentrations of the NH4NO3 and KNO3 (2x; 1x; ½ and ¼ MS medium) and three concentrations... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Tissue culture; Macronutrients; Cytokinins; Multiplication; Growth. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362011000300017 |
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| Castro-ruiz, Diana; Andree, Karl B.; Solovyev, Mikhail M.; Fernández-méndez, Christian; García-dávila, Carmen; Cahu, Chantal; Gisbert, Enric; Darias, Maria J.. |
| Pseudoplatystoma punctifer is an Amazonian catfish highly appreciated for its high flesh quality, size, and commercial value. Its aquaculture is pursued to satisfy the demands of an increasing population in the region. However, knowledge of the nutritional needs during the early life stages is necessary for improving growth and reducing the incidence of cannibalism, factors that limit the success of its commercial farming. This study aimed at evaluating the influence of four diets containing different protein and lipid levels (30:15, 30:10, 45:15, or 45:10 in %) in the digestive physiology and performance of early juveniles. The results showed that the dietary protein:lipid as well as carbohydrate levels and ratios influenced differently the whole-body... |
| Tipo: Text |
Palavras-chave: Neotropical fish; Aquaculture; Digestive enzymes; Gene expression; Nutrition; Juveniles; Histology; Development; Macronutrients; Diet. |
| Ano: 2021 |
URL: https://archimer.ifremer.fr/doc/00678/79019/81420.pdf |
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| Rakocevic, Miroslava; Medrado, Moacir José Sales; Lavoranti, Osmir José; Valduga, Alice Teresa. |
| The aim of this study was to assess the taste of beverage prepared from yerba-mate (Ilex paraguariensis) leaves, originated from male and female plants, by taking into account leaf gas exchange and the content of macro-and-trace-elements. Ecophysiological, chemical and sensorial properties were evaluated in one of the sprouting phases and in two fruit ripening phases. Male and female plants did not differ in fresh and dry matter production per plant, nor in the content of micro- and trace elements. However, female plants showed higher leaf net photosynthesis (A) and stomatal conductance (gs) than male plants. The beverage prepared with male plant leaves was less bitter than that prepared with female plant leaves, especially when leaves from the branch tips... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Macronutrients; Photosynthesis; Productivity; Stomatal conductance; Bitterness; Trace elements Amargo; Condutância estomática; Fotossíntese; Macro-elementos; Micro-elementos; Produtividade.. |
| Ano: 2010 |
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/131 |
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| Petter,Fabiano André; Madari,Beáta Emöke; Silva,Mellissa Ananias Soler da; Carneiro,Marco Aurélio Carbone; Carvalho,Márcia Thaís de Melo; Marimon Júnior,Ben Hur; Pacheco,Leandro Pereira. |
| The objective of this work was to evaluate the effect of biochar made from Eucalyptus on soil fertility, and on the yield and development of upland rice. The experiment was performed during two years in a randomized block design with four replicates, in a sandy loam Dystric Plinthosol. Four doses of NPK 05-25-15, annually distributed in stripes (0, 100, 200 and 300 kg ha-1), and four doses of biochar (0, 8, 16 and 32 Mg ha-1), applied once in the first year - alone or with NPK - were evaluated. In the first year, biochar positively affected soil fertility [total organic carbon (TOC), Ca, P, Al, H+Al, and pH], at 0-10 cm soil depth, and it was the only factor with significant effect on yield. In the second year, the effect of biochar diminished or was... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biochar; Macronutrients; Plant biomass; Plant growth; Soil acidity; Rice yield. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2012000500010 |
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| Virgolin,Lara Borghi; Seixas,Fernanda Rosan Fortunato; Janzantti,Natália Soares. |
| Abstract: The objective of this work was to evaluate the physicochemical composition, the bioactive compounds, and the total antioxidant activity of the fruit pulps of abiu (Pouteria caimito), achachairu (Garcinia humilis), araza (Eugenia stipitata), bilimbi (Averrhoa bilimbi), and yellow mangosteen (Garcinia xanthochymus) from the Brazilian Amazon biome. Total soluble solid content, total and reducing sugar contents, titratable acidity contents, pH, ascorbic acid content, moisture, protein, lipid, ash, and caloric value were determined. The contents of total anthocyanins, yellow flavonoids, and total carotenoids, besides total phenolic compounds and antioxidant activity, were also evaluated. The abiu pulp showed the highest contents of ash, total sugars,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amazon biome; Exotic fruit; Fruit physicochemical composition; Macronutrients; Micronutrients. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2017001000933 |
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| Bianco,S.; Carvalho,L.B.; Bianco,M.S.. |
| A greenhouse trial was carried out from November 1995 to April 1996 at FCAV/UNESP, Brazil, aiming to study the dry matter production and the accumulation and distribution of macronutrients in Solanum americanum, an important weed for annual and perennial crops in Brazil. The plants were grown in seven liter pots with sand substrate, irrigated daily with Hoagland & Arnon nutrient solution. The experimental design was completely randomized with four replicates. The treatments corresponded to evaluation times at 14 day intervals, beginning 21 days after emergence (DAE). In each evaluation, the plants of four pots were analyzed for dry matter production and macronutrient content. S. americanum had a small dry matter and macronutrient accumulation at... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Weed; American black nightshade; Dry matter; Macronutrients. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582010000200008 |
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| Carvalho,L.B.; Bianco,S.; Pitelli,R.A.. |
| A greenhouse experiment was carried out from November 2006 to April 2007 at FCAV/UNESP, Brazil, aiming to study the dry mass production and the accumulation and distribution of macronutrients in Ipomoea quamoclit, an important weed for annual and perennial crops in Brazil. The plants were grown in seven liter pots with sand substrate, daily irrigated with Hoagland & Arnon nutrient solution. The experimental design was completely randomized with four replicates. The treatments corresponded to evaluation times at 14 day intervals, beginning 21 days after emergence (DAE). In each evaluation, the plants of four pots were analyzed in function of dry mass production and macronutrient content. I. quamoclit had a small dry mass and macronutrient... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Weeds; Morningglory; Dry mass; Macronutrients. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582009000200010 |
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| Lima,Sandra Santana de; Pereira,Marcos Gervasio; Pereira,Renato Nunes; Pontes,Rafael Moura de; Rossi,Celeste Queiroz. |
| ABSTRACT Termites have peculiar activities in the soil, inducing significant changes in the soil properties. The objective of this study was to assess physical and chemical properties and soil organic matter to evaluate the effect of termite activity and termite mounds on the soil. Two toposequences were selected and divided in slope thirds (shoulder, backslope, and footslope). In each of these, four termite mounds were selected. Samples were taken from the soils and termite mounds (top, center, and base) along with a variety of termites for identification. Analyses were carried out for physical, soil texture, and chemical properties, as well as for particle size and chemical fractioning of organic matter. The species Cornitermes cumulans was found in all... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Isoptera; Termitaria; Macronutrients; Organic matter. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832018000100406 |
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| Gazola,Rodolfo de Niro; Buzetti,Salatiér; Teixeira Filho,Marcelo Carvalho Minhoto; Gazola,Raíssa Pereira Dinalli; Celestrino,Thiago de Souza; Silva,Alexandre Costa da; Silva,Paulo Henrique Müller da. |
| ABSTRACT Potassium (K) is one of the most highly accumulating nutrients in Eucalyptus and, consequently, is heavily exported by the harvesting of wood. Moreover, its availability in the soil in most Brazilian plantation areas is very low, especially in the regions of the Cerrado biome, which has soils with low natural fertility and marked water deficits, implying a lack of nutrient supply and, consequently, a less efficient water use. Our objective was to evaluate the effects of K fertilization on Eucalyptus biomass yield, the addition of nutrients to the soil by leaf deposition, nutrient use efficiency, and soil K availability. The experiment was conducted with clone I144 (Eucalyptus urophylla) in the municipality of Três Lagoas/MS, in a Neossolo... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Senescent leaf nutrients; Fertilization; Biomass; Macronutrients; Nutritional efficiency. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832019000100505 |
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| Bezerra,Marcio G. da S.; Silva,Gualter G. C. da; Difante,Gelson dos S.; Emerenciano Neto,João V.; Oliveira,Ermelinda M. M.; Morais,Éric G.. |
| ABSTRACT There is a worldwide concern regarding the management of agroindustrial residues, involving sustainable practices that contribute to taking advantage of the residues as inputs in productive processes, allowing greater efficiency in the integration of agricultural activities and mitigating their adverse effects on the soil. Therefore, the objective of this study was to assess the effects of application of cassava wastewater on the chemical attributes of the soil cultivated with Brachiaria brizantha cv. Marandu. The experimental design was in randomized blocks with five treatments (0, 15, 30, 60 and 120 m³ ha-1 of cassava wastewater) and four repetitions. To characterize soil chemical attributes soil samples were collected at depths 0 to 10 and 10... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biofertilizer; Macronutrients; ‘manipueira’; Soil fertility. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662019000800579 |
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| Lira,Raquele M. de; Silva,Ênio F. de F. e; Silva,Gerônimo F. da; Souza,Diego H. S. de; Pedrosa,Elvira M. R.; Gordin,Leandro C.. |
| ABSTRACT The objective of this study was to evaluate the contents of macronutrients and also chlorine and sodium in the diagnostic leaf, and the extraction and export of macronutrients in sugarcane irrigated with saline water and leaching fractions. The experiment was conducted in a complete randomized design in a 5 x 2 factorial scheme with four replications, corresponding to five levels of water salinity (0.5, 2.0, 3.5, 5.0 and 6.5 dS m-1) and two leaching fractions (L1 = 0 and L2 = 0.17). The treatments were applied 60 days after planting. At 280 days after planting, diagnostic leaves were collected and used to evaluate the nutritional status and the contents of Cl and Na. At 360 days after planting, the sugarcane was harvested and its stalks were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Saccharum spp.; Saline waters; Macronutrients. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662019000600432 |
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| Registros recuperados: 40 | |
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