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| Registros recuperados: 65 | |
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| 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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| 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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| FURLANI, P. R.; LIMA, M.; MIRANDA, L. T. de; MIRANDA, L. E. C.; SAWASAKI, E.; MAGNAVACA, R.. |
| Neste trabalho realizou-se a avaliacao da tolerancia a Al (4,5 mg.l) de 39 linhagens, 98 materiais comerciais, 167 progenies de uma populacao IAC-Maya e de 466 progenies de uma populacao IAC-Genetica, usando-se a tecnica de solucao nutritiva. Foram usadas na avaliacao as características ICR (indice de crescimento da radicula = comprimento relativo da radicula -CRR (CR+Al.CR-Al)- multiplicado por comprimento relativo da raiz secundaria mais longa - CRRSML (CRSML+Al/CRSML-Al) e CLR (comprimento liquido da radicula = diferenca entre os valores de comprimento da radicula - CR - obtidos no inicio e fim do periodo de crescimento das plantas em presenca de Al). As linhagens e as progenies da populacao IAC-Maya a de milho foram avaliadas através do ICR enquanto... |
| Tipo: Parte de livro |
Palavras-chave: Tolerancia; Variabilidade; Crescimento da raiz; Nutrient; Solution; Genetic; Aluminium; Tolerance.; Alumínio; Genética; Linhagem; Milho; População; Solução Nutritiva; Zea Mays.; Inbred lines; Population; Variability.; Root growth. |
| Ano: 1984 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/478622 |
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| 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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| SILVA, H. D. da; POGGIANI, F.; COELHO, L. C.. |
| Com o objetivo de estimar a concentração de nutrientes nas folhas, ramos, casca, lenho e o conteúdo de nutrientes, em função da biomassa produzida no tronco, utilizou-se um ensaio de competição envolvendo as espécies Eucalyptus grandis (Hill) Maiden, E. saligna Smith, E. propinqua Deane et Maiden, E. dunnii Maiden e E. robusta Smith, com 10 anos de idade, todas de origem e procedências australianas, plantadas em solos arenosos e de baixa fertilidade, em Itirapina - SP. As espécies que produziram maiores quantidades de biomassa oriunda do tronco foram E. saligna e E. grandis. Os nutrientes concentraram-se, de forma decrescente, nas folhas, ramos, casca e lenho. E. grandis foi a que apresentou maior acúmulo de nitrogênio (N), fósforo (P) e potássio (K) e... |
| Tipo: Artigo de periódico |
Palavras-chave: Concentracao; Acumulo; Eucalyptus saligana; Eucalyptus propinqua; Eucalyptus dunnii; Nutrient; Content; Accumulation.; Eucalyptus Grandis; Nutriente.; Eucalyptus robusta.. |
| Ano: 1983 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/282259 |
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| PEREIRA, J. C.; FREITAS, S. P. de; QUEIROZ, A. C. de; SILVA, J. F. C. da; VALADARES FILHO, S. de C.; ARAUJO, G. G. L. de. |
| Este trabalho foi conduzido para se avaliar o efeito de diferentes niveis de concentrado na dieta sobre os teores de materia seca (MS), fibra em detergente neutro (FDN), fibra em detergente acido (FDA) e proteina bruta (PB) da digesta, em diferentes secoes do trato gastrintestinal (TGI) de bezerros provenientes de rebanhos leiteiros. Trinta e dois bezerros machos nao-castrados, metade Holandeses puros por cruza e metade mesticos Holandeses-Zebu, foram abatidos, apos jejum de 16 horas, com media de 6 meses de idade e 190 kg PV final. As dietas, fornecidas a vontade, foram constituidas de feno de capim coast-cross e diferentes niveis de concentrado na racao (milho moido, farelo de soja, calcario e sal mineral), 45,0; 60,0; 75,0; e 90,0%. Nao houve diferencas... |
| Tipo: Artigo de periódico |
Palavras-chave: Nivel de concentrado; Dairy calf; Concentrate level; Nutrient; Aniaml productionl; Produção animal; Bezerro; Dieta; Nutriente; Diet. |
| Ano: 1999 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/133825 |
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| 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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| Pagès, R.; Baklouti, M.; Barrier, Nicolas; Richon, C.; Dutay, J.-c.; Moutin, T.. |
| The Mediterranean Sea (MS) is a semi-enclosed sea characterized by a zonal west-east gradient of oligotrophy, where microbial growth is controlled by phosphate availability in most situations. External inputs of nutrients including Gibraltar inputs, river inputs and atmospheric deposition are therefore of major importance for the biogeochemistry of the MS. This has long been considered to be driven mainly by nutrient exchanges at Gibraltar. However, recent studies indicate that river inputs signi cantly a ect nutrients concentrations in the Mediterranean Sea, although their resulting impact on its biogeochemistry remains poorly understood. In this study, our aim was to make good this lack by addressing the large-scale and long-term impact of variations in... |
| Tipo: Text |
Palavras-chave: Mediterranean Sea; River inputs; Coupled physical-biogeochemical model; Flexible stoichiometry model; Biogeochemistry; Nutrient. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00599/71118/69420.pdf |
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| 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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| 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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| 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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| 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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| DRUMOND, M. A.; POGGIANI, F.. |
| Objetivou-se relatar caracteristicas silviculturais de Liquidambar styraciflua e Pinus caribaea var. hondurensis em plantios puros e consorciados, bem como a producao de biomassa arborea e a distribuicao e concentracao de nutrientes nos componentes da biomassa. Utilizando parcelas puras e consorciadas, plantadas sem adubacao, no espacamento 2,0m x 2,5m, aos dez anos de idade. Os resultados obtidos mostraram que a biomassa total produzida em parcelas puras de Liquidambar e Pinus e inferior a biomassa total produzida em parcelas consorciadas, sendo 114,1 ton/ha pelas arvores de Liquidambar em parcelas puras apresentou por hectare os seguintes conteudos de macronutrientes: 241 kg de N, 17 g de P, 145 kg de K, 158 kg de Ca e 51 Kg de mg. A biomassa de Pinus em... |
| Tipo: Parte de livro |
Palavras-chave: Consorciacao; Pinus caribaea hondurensis; Forest; Nutrient; Liquidâmbar Styraciflua; Biomassa; Floresta; Nutriente; Biomass. |
| Ano: 1993 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/131934 |
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| Registros recuperados: 65 | |
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