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Registros recuperados: 47
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A re-examination of matrix effects in the segmented-flow analysis of nutrients in sea and estuarine water ArchiMer
Coverly, Stephen; Kerouel, Roger; Aminot, Alain.
Modern instruments together with the use of standard reference materials have improved the accuracy and long-term reproducibility of the analysis of nutrients (ammonium, nitrate, nitrite, phosphate and silicate) in sea water using segmented-flow analysis, so that errors arising from matrix effects become more significant. Colorimetric detectors with bubble-through flowcells have become widely used for seawater analysis in recent years and their associated matrix effects are described. A re-examination of all categories of matrix effects, whose main origin is salinity, was thus undertaken to assess how much they are liable to alter the data. Interferences were classified into four types, each of which was examined in order to show its influence on the...
Tipo: Text Palavras-chave: Nutrient; Determination; Seawater; Estuarine water; Segmented-flow analysis; Matrix effects.
Ano: 2012 URL: http://archimer.ifremer.fr/doc/00057/16843/14530.pdf
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Aporte de nutrientes e sólidos suspensos no Rio Taquari. Infoteca-e
OLIVEIRA, M. D. de; CALHEIROS, D. F..
A agricultura intensiva, pastagens cultivadas, garimpo, agroindústria e os efluentes urbanos estão entre os principais fatores que causam alterações ambientais no Pantanal e rios associados (Ferreira et. al., 1994). Estas atividades estão concentradas principalmente nas áreas de planalto e têm gerado aumentos no aporte de nutrientes e sedimentos para a planície. Um bom exemplo, é rio Taquari, um dos maiores tributários da bacia do alto rio Paraguai (Brasil; 1997). A bacia hidrográfica do rio Taquari está localizada entre as latitudes de 17°00'00''S e 20°00'00''S e as longitudes de 53°00'00''W e 58°00'00''W, abrangendo uma área de aproximadamente 65.023 km2, dentro da bacia do Alto Paraguai (BAP). No fim do alto curso, o rio Taquari recebe o rio Coxim com...
Tipo: Circular Técnica (INFOTECA-E) Palavras-chave: Assoreamento; Sólido suspenso; Característica; Rio Taquari; Sediment; Nutrient; Characteristic; Taquari river.; Água; Limnologia; Nutriente; Sedimento.; Limnology; Water..
Ano: 2002 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/810732
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Apports de nutriments et développement phytoplanctonique en baie de Seine ArchiMer
Aminot, Alain; Guillaud, Jean-francois; Andrieux Loyer, Francoise; Kerouel, Roger; Cann, Philippe.
As part of the Programme National d'Oceanographie Cotiere, the nutrient dynamics of the Bay of Seine were studied between 1992 and 1994 in order to complement work on ecological modelling. Firstly, the River Seine's nutrient fluxes were established: 80 000-130 000 t a(-1) of dissolved inorganic nitrogen, 6 400-8 400 t a(-1) of dissolved phosphorus and 20 000-77 000 t a(-1) of dissolved silicium. Estuarine processes were taken into account. Consequences of nutrient loading for the bay were then evaluated at the pelagic level (nutrient and chlorophyll enrichments) and the benthic level (distribution of various phosphorus fractions in superficial sediments). The large continental inputs always induce concentration gradients in the water from the mouth of the...
Tipo: Text Palavras-chave: Baie de Seine; Rapport de consommation; Chlorophylle; Nutriment; Bay of Seine; Uptake ratio; Chlorophyll; Nutrient.
Ano: 1998 URL: http://archimer.ifremer.fr/doc/1998/publication-844.pdf
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Biomass and mineralmass estimates in a "cerrado" ecosystem Rev. Bras. Bot.
Delitti,Welington Braz Carvalho; Meguro,Marico; Pausas,Juli Garcia.
This work aimed to develop allometric equations for tree biomass estimation, and to determine the site biomass in different "cerrado" ecosystems. Destructive sampling in a "campo cerrado" (open savanna) was carried out at the Biological Reserve of Moji-Guaçu, State of São Paulo, southeastern Brazil. This "campo cerrado" (open savanna) grows under a tropical climate and on acid, low nutrient soils. Sixty wood plants were cut to ground level and measurements of diameter, height and weight of leaves and stems were taken. We selected the best equations among the most commonly used mathematical relations according to R² values, significance, and standard error. Both diameter (D) and height (H) showed good relationship with plant biomass, but the use of these...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Allometry; Carbon; Cerrados; Nutrient; Savannas.
Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042006000400003
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Centesimal and mineral composition of the fruit in Brazilian genotypes of feijoa (Acca sellowiana) Rev. Bras. Frutic.
Amarante,Cassandro Vidal Talamini do; Souza,Alexandra Goede de; Steffens,Cristiano André; Benincá,Thalita Dal Toé.
Abstract This research was carried out to evaluate centesimal [dry matter (DM), ash, and crude contents of proteins (CP), fats (CFt) and fiber (CFb)] and mineral composition (Ca, Mg, N, P, K, Fe, Zn, Cu and Mn) of peel and flesh tissues of feijoa fruit (cultivars Alcântara, Mattos, Helena and Nonante, and accession 2316). The genotypes had, in the flesh, DM of 12.10-15.40%, ash of 0.33-0.40%, CP of 0.95-1.45%, CFt of 0.56-1.72%, and CFb of 1.39-2.43%, and in the peel DM of 12.8-17.27%, ash of 0.30-1.49%, CP of 0.56-0.88%, CFt of 0.57-0.90%, and CFb of 2.54-3.98%. The contents of Ca, Mg, K, N and P in the peel were 96-116, 20-30, 1588-3635, 1096-1643 and 68-83 mg kg-1 FW, respectively, and in the flesh were 56-92, 17-29, 1358-2917, 2017-3384 and 255-374 mg...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Feijoa sellowiana; Ash; Fiber; Fat; Nutrient; Protein.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452019000600302
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C/N RATIO AND NUTRIENT CONTENT IN PEACH BARK RELATED TO PEACH TREE SHORT LIFE Rev. Bras. Frutic.
MAYER,NEWTON ALEX; UENO,BERNARDO; SILVA,VALÉCIA ADRIANA LUCAS DA; VALGAS,RICARDO ALEXANDRE; SILVEIRA,CRISTINA MOREIRA DA.
ABSTRACT Peach Tree Short Life (PTSL) is a syndrome characterized by a plant collapse at the end of dormancy, which causes include several biotic and abiotic components. The aim of this study was to assess the C/N ratio and bark nutrients in symptomatic and asymptomatic short-life peach trees. Live tissue portions were removed from the bark of the main scaffolds of symptomatic and asymptomatic adjacent trees in nine commercial peach orchards located in Pelotas and Canguçu, state of Rio Grande do Sul, Brazil. In laboratory, carbon (C), nitrogen (N), phosphorus (P), potassium (K), calcium(Ca), magnesium (Mg), iron (Fe), manganese (Mn), zinc (Zn), copper (Cu), boron (B) contents and C/N ratio were determined. The main component analysis of the study...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Nutrient; Nutrition; PTSL syndrome; Prunus spp.; Rosaceae.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452016000400403
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Dehydrated citrus pulp digestibility and the effect of its inclusion in diet on the performance of growing rabbits - doi: 10.4025/actascianimsci.v35i1.12359 Animal Sciences
Maria, Bruno Giovany; Universidade Estadual de Maringá; Scapinello, Cláudio; Universidade Estadual de Maringá; Oliveira, Andréia Fróes Galuci; Universidade Estadual de Maringá; Monteiro, Ana Carolina; Universidade Estadual de Maringá; Catelan, Fernanda; Universidade Estadual de Maringá; Figueira, Josianny Limeira; Universidade Estadual de Maringá.
Several experiments were conducted to determine the digestibility of dehydrated citrus pulp (DCP) and evaluate its effect on rabbit feed. Digestibility assay comprised 30 rabbits fed on two diets: a reference diet and a diet in which 20% consisted of DCP. The digestibility assay comprised 10 days for adaptation and four days for feces collection. The digestibility coefficient and digestible nutrient rates for DM, CP, NDF, ADF, and CE of DCP were respectively 83.75 and 76.04%; 70.12 and 5.03%; 40.14 and 9.52%; 68.98 and 15.09%; and 81.48% and 3394 kcalDE kg-1 DM. Performance assay consisted of 120 growing rabbits receiving diets with six DCP levels (0, 20, 40, 60, 80 and 100%) to replace corn. Linear decrease (p < 0.01) in daily feed intake and...
Tipo: Ensaio de digestibilidade; análise laboratorial; análise de desempenho Palavras-chave: 5.04.05.00-4 carcaça; Rendimento; Nutriente; Fibra digestível; Pectina carcass; Yield; Nutrient; Digestible fiber; Pectin.
Ano: 2013 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/12359
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Demand for Nutrients: The Household Production Approach AgEcon
Chung, Rebecca H.; Lee, Jonq-Ying; Brown, Mark G..
This study uses the household production theory to study the demand for nutrients, i.e., households purchase a combination of food items from the market and produce the needed nutrients from these food items. By following the traditional household production approach, shadow prices for nutrients in food consumption are calculated. The cost function that generates the shadow prices appears plausible in terms of its elasticities of substitution and factor demand. After obtaining the calculated shadow prices of nutrients, the nutrient demand functions are estimated. Results show that the own-price elasticity of demand for nutrient is inelastic, whereas the expenditure elasticities indicate that nutrients are normal goods. Crossprice elasticities show that...
Tipo: Conference Paper or Presentation Palavras-chave: Nutrient; Household production theory; Demand; Demand and Price Analysis.
Ano: 1998 URL: http://purl.umn.edu/52825
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Development of modified medium for the enhancement in antifungal activity of P. steckii (MF1 mangrove fungi) against verticillium wilt pathogenic fungi of rose BABT
Sabat,Jyotasanmayee; Gupta,Nibha.
The antifungal activity of Penicillium steckii (MF1) against pathogenic fungi of rose causing verticillium wilt was evaluated under differential nutrient condition. A suitable and modified medium was obtained in which test fungus exhibited enhanced antifungal activity and produced larger inhibition zone against the verticillium fungus. The study carried out to modify the medium components at level of nitrogen, carbon source and their concentration on agar plates. Addition of amino acids, metals and plant growth hormones did not show positive effect but glycerol enhanced the antifungal activity very much.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Antifungal; Penicillium; Nutrient; Rose; Verticillium wilt.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132009000400003
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Diagnose de desordens nutricionais em hortaliças. Infoteca-e
MAGALHAES, J. R..
bitstream/item/107316/1/CNPH-DOC.-1-88.pdf
Tipo: Documentos (INFOTECA-E) Palavras-chave: Vegetable; Nutrient; Deficiency; Nutritional desorder.; Deficiência; Distúrbio Fisiológico; Hortaliça; Nutriente..
Ano: 1988 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/756913
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Diagnosis and recommendation integrated system (DRIS) of tomato in greenhouse Horticultura Brasileira
Scucuglia,Cesar L; Creste,José E.
Plant nutrition is one of the most important factors for successful cultivation of tomatoes, especially in the greenhouse, and Diagnosis and Recommendation Integrated System (DRIS) is an alternative for fertilizer recommendation. This study aimed to establish DRIS norms for tomato plants growing in greenhouse located at Norte Pioneiro do Paraná region (Paraná State, Brazil). Chemical analysis of nutrients on leaves (N, P, K, Ca, Mg, S, B, Cu, Fe, Mn and Zn) of hybrid tomatoes (Colibri, Pizzadoro, Debora Max and Granadero), and respective yields of 61 growing areas in greenhouses (24.4 ha) were used. Samples were collected during April to December 2010, in five cities. Five levels of tomato yield (6, 7, 8, 9, and 10 kg plant-1) were used for establishing a...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Solanum lycopersicum; Foliar diagnosis; Nutritional balance; Plant nutrition; Nutrient.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362014000200200
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Dinamica de nutrientes em solos arenosos no Pantanal Mato-Grossense. Infoteca-e
CUNHA, N. G. da.
Nos solos arenosos das sub-regioes da Nhecolandia e dos Paiaguas, no Pantanal Mato-Grossense, tem sido desenvolvidas pesquisas que objetivam determinar as limitacoes existentes ao estabelecimento e crescimento de forrageiras. Neste aspecto sao revisados os resultados dos experimentos realizados referentes a estabilidade dos nutrientes em cordilheira, causas da variacao estacional da producao das forrageiras, variacao da umidade nos solos de cordilheira e caronal, niveis e limitacoes de nutrientes no meio, uso da calagem nos solos mais pobres, produrando-se discutir as informacoes basicas obtidas e delas avaliar o conjunto de fatores que interfere na producao de forrageiras. A analise dos resultados indica que o sistema solo-agua-planta em seu dinamismo...
Tipo: Circular Técnica (INFOTECA-E) Palavras-chave: Forrageira; Fertility; Nutrient; Production.; Absorção; Água; Fertilidade; Nutriente; Produção; Solo Arenoso.; Solo; Brazil; Pantanal; Absorption; Forage; Soil; Sandy soils; Water..
Ano: 1985 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/787717
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Distribution et caractérisation par fluorescence de la matière organique dissoute dans les eaux de la Manche centrale ArchiMer
Ismaili, Mm; Belin, Colette; Lamotte, M; Texier, H.
Intensity and spectral characteristics of the fluorescence of water samples collected along the transect Cherbourg-Isle of Wight during four cruises for excitations at 370, 313 and 270 nm have been investigated within the framework of the FluxManche II program. Seasonal and spatial differences appeared to reflect on the one hand, variations in terrestrial inputs, and on the other hand, waters masses structuring. The observed linear variation of the fluorescence intensity with salinity indicates a gradual dilution of the continental humic material in going from the coasts to the central part of the English Channel. The largest signal was observed for the English coastal waters in agreement with important terrestrial inputs from the Solent river. While the...
Tipo: Text Palavras-chave: Spectrofluorimétrie; Matière organique dissoute; Manche; Traceur de masse d'eau; Nutriment; Spectrofluorimetry; Dissolved organic matter; English Channel; Tracer of water mass; Nutrient.
Ano: 1998 URL: http://archimer.ifremer.fr/doc/00325/43649/43243.pdf
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Effect of Vermicompost and Compost on Lettuce Production Chilean J. Agric. Res.
Hernández,Adriana; Castillo,Hugo; Ojeda,Dámaris; Arras,Ana; López,Julio; Sánchez,Esteban.
A greenhouse study was conducted to evaluate the effect on total growth and leaf nutritional content in lettuce (Lactuca sativa L.) in the Agrotechnology Sciences Department of the Universidad Autonoma de Chihuahua, Mexico in 2007. Three types of fertilization treatments were analyzed: two organic and one conventional or inorganic. Both vermicompost and compost were produced from cattle manure in a 25-wk process. The study included 12 experimental units made up of lettuce plantlets var. Great Lakes. A linear model was fitted for statistical analysis using a completely randomized experimental design. ANOVA was performed and means were compared by orthogonal contrasts. Results showed differences in weight and leaf content for the N and K variables, and the...
Tipo: Journal article Palavras-chave: Fertilization; Nutrient; Growth; Quality.
Ano: 2010 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392010000400008
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Effects of seasonal dynamics in a Zostera noltii meadow on phosphorus and iron cycles in a tidal mudflat (Arcachon Bay, France) ArchiMer
Deborde, Jonathan; Abrill, Gwenael; Mouret, Aurelia; Jezequel, Didier; Thouzeau, Gerard; Clavier, Jacques; Bachelet, Guy; Anschutz, Pierre.
A study was conducted in Arcachon Bay, France, to determine the effect of seasonal dynamics in a Zostera noltii meadow on P and Fe cycles in the superficial sediments of a tidal mudflat. The redox-sensitive Fe particulate pool and associated P in the root zone showed a seasonal variation following the growth and decay of Z. noltii biomass, with a maximum content during the growth period. In comparison, the bare sediments did not show significant seasonal changes. A dissolved inorganic phosphorus (DIP) uptake was measured from the water column to the sediment in vegetated sediments, whereas a net DIP efflux was observed in the unvegetated sediments. During the growth period, the formation of an iron oxihydroxide-rich zone occurred and acted as a trap for...
Tipo: Text Palavras-chave: Nutrient; Eelgrass growth; Intertidal zone; Lagoon; Early diagenesis.
Ano: 2008 URL: https://archimer.ifremer.fr/doc/00603/71539/69966.pdf
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Environmental protection of agriculture -clash of policies? AgEcon
Helin, Janne.
Agricultural primary production is extensively influenced by policies and regulation. On the level of European Union the common agricultural policy (CAP), frames the production environment. This study analyses the conflict of environmental and income policies in the context of CAP reform, eutrophication, the Water Framework Directive and Finnish policies. As targets of the policies do not coincide and often conflict, the environmental problems of farming have not been solved in the past decades. The comparative analysis is conducted quantitatively under static non-linear optimisation framework of representative farms of cereal and milk production regions of Finland. The results indicate that the decoupling of subsidies from production has enabled more...
Tipo: Conference Paper or Presentation Palavras-chave: Nutrient; Abatement cost; Non-point source pollution; Agriculture; CAP; Agricultural and Food Policy; Agricultural Finance; Crop Production/Industries; Environmental Economics and Policy; Livestock Production/Industries.
Ano: 2008 URL: http://purl.umn.edu/6468
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Estudos fito-ecológicos do trópico úmido brasileiro. III. Conteúdo de nutrientes em cinzas de floresta e capoeira, Capitão Poço - PA. Infoteca-e
DANTAS, M.; MATOS, A. de O..
bitstream/item/28973/1/CPATU-BP24.pdf
Tipo: Séries anteriores (INFOTECA-E) Palavras-chave: Fertilização; Capitão-Poço; Pará; Brasil; Nutrient; Forest; Fertizer; Brushwood.; Adubação; Capoeira; Ecologia; Floresta; Nutriente; Queimada; Solo; Vegetação.; Amazonia; Ecology; Burning; Vegetation.; Soil.
Ano: 1981 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/379783
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Etude des apports en herbicides et en nutriments par la Charente : Modélisation de la dispersion de l'atrazine dans le bassin de Marennes-Oléron ArchiMer
Munaron, Dominique.
Our study aims at making progress the estimate of herbicide and nutrient inputs to the Marennes-Oleron bay which could influence summer oysters mortalities, and to bring by modeling a better understanding of the dynamics of these compounds in the shellfish-farming area. The development of a strategy adapted to the Charente river and its estuary reveals that agricultural activity on the catchment area is omnipresent, as well on the level of the nitrogen and herbicides contributions. It is thus necessary to specify Charente fluxes, which is the main tributary of the Marennes-Oleron bay, in order to better characterize its impact on shellfishfarming activity. Use of a dispersion model will constitute an invaluable help in the risk assessment with respect to...
Tipo: Text Palavras-chave: Atlantic coast; Marennes Oléron Bay; Modelisation; Estuary; Geochemistry behaviour; Charente River; Flux; Nutrient; Herbicide; Littoral Atlantique; Bassin de Marennes Oléron; Modélisation; Estuaire; Comportement Géochimique; Charente; Flux; Nutriments; Herbicides.
Ano: 2004 URL: http://archimer.ifremer.fr/doc/2004/these-2266.pdf
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Evaluation of nutrient supplementation to charcoal-treated and untreated rice straw hydrolysate for xylitol production by Candida guilliermondii BABT
Mussatto,Solange Inês; Roberto,Inês Conceição.
Xylitol was produced by Candida guilliermondii from charcoal-treated and untreated rice straw hemicellulosic hydrolysate with or without nutrients (ammonium sulphate, calcium chloride, rice bran extract). Both, xylitol yield and volumetric productivity decreased significantly when the nutrients were added to treated and untreated hydrolysates. In the treated hydrolysate, the efficiency of xylose conversion to xylitol was 79% when the nutrients were omitted. The results demonstrated that rice straw hemicellulosic hydrolysate treated with activated charcoal was a cheap source of xylose and other nutrients for xylitol production by C. guilliermondii. The non-necessity of adding nutrients to the hydrolysate media would be very advantageous since the process...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Rice straw hydrolysate; Nutrient; Activated charcoal; Candida guilliermondii; Xylitol.
Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132005000300020
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Evolution de communautés phytoplanctoniques après fertilisation modérée ArchiMer
Jacques, G.; De Billy, G..
One approach to the problem of aquaculture consists in a simple acceleration of natural processes in extended areas of salt or brackish water. From this point of view, the authors have been in­terested in the effect of moderate fertilization on natural communi­ties . A first series of experiments (8) was made in an exter­nal tank of 3000 liters. After fertilization, the development of flowering diatoms was obtained each time. The time of latency, the level of production reached, the composition of the final communities is to some extent variable, but bacterial development may be neglec­ted. In contrast to earlier results, obtained in small volumes of water, these experiments have always led to simplified communities mostly dominated by the diatom...
Tipo: Text Palavras-chave: Phytoplancton; Fertilisation; Chémostat.; Phytoplankton; Nutrient; Enrichment; Chemostat.
Ano: 1979 URL: http://archimer.ifremer.fr/doc/00306/41688/40897.pdf
Registros recuperados: 47
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