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| Registros recuperados: 11 | |
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| Pellini, Tiago; Caviglione, Joao Henrique; Doretto, Moacyr. |
| A partir dos dados do Censo Agropecuário, acopladas a uma base cartográfica do recurso solo do Paraná, foram construídos e interpretados uma série de indicadores focados no objetivo de subsidiar o planejamento e gestão das atividades de criação intensiva de animais numa base municipal, regional ou territorial. O estudo divide-se em duas fases, sendo a primeira a de determinação de indicadores capazes de expressar a condição dos municípios do estado quanto à concentração relativa de rebanhos animais, produção de estercos, área utilizada para agricultura (culturas e pastagens), enquanto a segunda estima, com base nas entradas de insumos – fertilizantes orgânicos e industrializados, concentrados e rações, e na saída de produtos - venda de produtos animais e... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Balanço de nutrientes; Densidade animal; Planejamento municipal e regional; Prevenção e controle de poluição; Pecuária intensiva; Nutrient balance; Animal density; Local and regional planning; Pollution prevention and control; Intensive livestock; Environmental Economics and Policy; Livestock Production/Industries. |
| Ano: 2008 |
URL: http://purl.umn.edu/109667 |
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| Mourão Filho,Francisco de Assis Alves; Azevedo,João Carlos. |
| Diagnosis and Recommendation Integrated System (DRIS) applies nutrient ratios instead of the isolated concentration values of each nutrient in interpretation of tissue analysis. The objectives of this research were to establish adequate DRIS norms for 'Valencia' sweet orange irrigated commercial groves budded on three rootstocks and correlate indexes of nutrition balance with yield. Experiments were conducted in São Paulo State, Brazil. Rootstocks Rangpur lime, Caipira sweet orange, and Poncirus trifoliata, with more than six years old and yield above 40 ton ha-1 were utilized. Data referred to yield, tree spacing, rootstock and foliar concentrations of N, P, K, Ca, Mg, S, Fe, Mn, Cu, Zn, and B in non fruiting terminals for each grove were processed for... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Citrus; Foliar diagnosis; Nutrient balance; Plant nutrition. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2003000100012 |
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| Hoang, Viet-Ngu; Coelli, Tim J.. |
| This paper develops a new measure of total factor productivity growth in agricultural production which incorporates environmental effects. The new measure is called the Total Factor Nutrient-Orientated Productivity (TFNP) Index, and incorporates a materials balance condition. TFNP measures changes in nutrient-orientated efficiency and can be decomposed into efficiency change (EC), technological change (TC) and nutrient-orientated technological change (NTC) components. An empirical analysis, involving country-level data from OECD countries during 1990-2003, is provided using DEA methods. Estimates of mean technical and nutrient-orientated efficiency are 0.798 and 0.526, respectively. Estimated mean TFNP growth is 1.5% per year, with nutrient-orientated... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Total factor productivity; Environment; Nutrient balance; DEA; Productivity Analysis; Environmental Economics and Policy. |
| Ano: 2009 |
URL: http://purl.umn.edu/47636 |
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| Montes,Rafael Marangoni; Parent,Léon Étienne; Amorim,Daniel Angelucci de; Rozane,Danilo Eduardo; Parent,Sergie-Étienne; Natale,William; Modesto,Viviane Cristina. |
| ABSTRACT Guava response to fertilization can be monitored through plant tissue analysis. Correct interpretation of these results, based on standard levels, is of great importance for correct nutrient management of the crop. However, standard levels are constantly criticized for not considering interactions among elements. To improve the nutritional diagnosis of ‘Paluma’ guava (Psidium guajava L., Myrtaceae), an experiment was conducted using nitrogen fertilization (0, 0.5, 1.0, and 2.0 kg per plant per cycle of N, with urea as a source with 45 % N), and potassium fertilization (0, 0.55, 1.1, and 2.2 kg per plant per cycle of K2O, with potassium chloride as a source with 60 % K2O) in an irrigated commercial area for five consecutive cycles, 2009 through... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Isometric log ratio (ilr); Mineral nutrition; Nutrient balance; Compositional analysis. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832016000100534 |
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| Dezordi,Luciel Rauni; Aquino,Leonardo Angelo de; Novais,Roberto Ferreira; Aquino,Priscila Maria de; Santos,Luiz Paulo Dornelas dos. |
| ABSTRACT The literature on fertilization for carrot growing usually recommends nutrient application rates for yield expectations lower than the yields currently obtained. Moreover, the recommendation only considers the results of soil chemical analysis and does not include effects such as crop residues or variations in yield levels. The aim of this study was to propose a fertilizer recommendation system for carrot cultivation (FERTICALC Carrot) which includes consideration of the nutrient supply by crop residues, variation in intended yield, soil chemical properties, and the growing season (winter or summer). To obtain the data necessary for modeling nutritional requirements, 210 carrot production stands were sampled in the region of Alto Paranaíba, State... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Nutrient balance; Daucus carota L.; Plant nutrition. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832015000601714 |
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| Santana,Yânez André Gomes; Alves,Arnaud Azevêdo; Oliveira,Maria Elizabete de; Moreira Filho,Miguel Arcanjo; Cerqueira Neto,Cícero Fortes de. |
| The intake, digestibility, nitrogen balance and energetic balance were evaluated in sheep diets consisting of hay from Tifton 85 grass at two ages of regrowth (28 and 42 days) and hay from leucaena at 40 days of regrowth, in the proportions of 20 and 40%. Twenty Santa Inês sheep, kept in metabolic cages, were used in a randomised block design according to body weight. The hay from the Tifton 85 grass, processed at 28 days of regrowth, resulted in a higher CP intake than when processed at 42 days of regrowth. There was higher protein intake for the 40% proportion of leucaena hay in relation to that of 20%, regardless of the regrowth age of the grass. Diets containing Tifton 85 grass processed at 28 days resulted in greater values for both DE and ME. There... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Nutrient balance; Voluntary intake; Cynodon spp. Digestibility; Leucaena leucocephala. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902014000200021 |
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| Nogueira-Filho,Sérgio Luiz Gama; Carvalho,Marco Antônio Galvão de; Mendes,Alcester; Nogueira,Selene Siqueira da Cunha. |
| The objective was to determine the nitrogen-protein, calcium and phosphorus requirements of adult capybaras (Hydrochoerus hydrochaeris) bred in captivity through a nutritional balance study under conditions that favored the occurrence of cecotrophy. In a completely randomized design with four replicates per treatment, 16 adult female capybaras were fed isocaloric diets containing four levels of nitrogen (11.4, 12.3, 15.4 and 18.4 g N/kg dry matter-DM); calcium (3.0, 3.5, 4.0 and 4.5 g Ca/kg-DM); and phosphorus (2.0, 2.3, 2.7 and 3.0 g P/kg-DM). After 10 days of adaptation, the collection of feces was carried out for five consecutive days. Immediately following fecal collection, the animals were housed in metabolic cages for two days for urine collection.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Capybara nutrition; Cecotrophy; Digestibility; Hydrochoerus hydrochaeris; Nutrient balance; Wild animals. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982013000500005 |
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| Cruz,André Freire; Almeida,Glicia Maria de; Wadt,Paulo Guilherme Salvador; Pires,Marcio de Carvalho; Ramos,Maria Lucrecia Gerosa. |
| Abstract This research evaluated the monthly variation of plant mineral nutrition in six species of fruit trees over a year. Leaf samples were taken from the fruit trees and nutritional status (N, P, K, Ca, Mg, Fe, Zn, Cu, Mn, and Mo) was determined in the leaves in a month basis from April until November for apple, persimmon and peach. Mandarin mineral nutrition was monitored for one year, and grape and fig from May to November. Using this data, the Diagnosis Recommendation Integrated System (DRIS) was also calculated to evaluate the nutrient balance in the plants. The concentration of N and P had seasonal differences, especially in apple and peach, which reached the peak during the summer. Apple, fig, and grape trees had large ranging on their mineral... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Diagnosis Recommendation Integrated System; Fruit Crops; General Plant Nutrition; Nutrient balance. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132019000100212 |
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| Registros recuperados: 11 | |
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