Nutrient Leaching
Mostrando 1-12 de 27 artigos, teses e dissertações.
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1. Leaching fraction impacts water use efficiency and nutrient losses in maize crop under salt stress
RESUMO Embora a fração de lixiviação (FL) seja utilizada para remover sais da zona radicular em condições de salinidade, quando inadequadamente calculada, pode diminuir a eficiência do uso da água e levar a grandes perdas de nutrientes essenciais. No presente estudo avaliou-se o uso da água, as concentrações de nutrientes foliares em plantas de mi
Revista Brasileira de Engenharia Agrícola e Ambiental. Publicado em: 2022
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2. SIMULATION AND EXPERIMENTAL INVESTIGATION OF POWER CONSUMPTION, GAS DISPERSION AND MASS TRANSFER COEFFICIENT IN A MULTI-PHASE STIRRED BIOREACTOR
Abstract Bio-oxidation leaching of refractory gold concentrate was carried out in a typical gas-liquid-solid three-phase stirred bioreactor. The bacteria, which adhered to solid particle surfaces and spread over the liquid phase, require sufficient oxygen and nutrient of carbon and nitrogen, and then the mass transfer rate should be considered. However, the
Braz. J. Chem. Eng.. Publicado em: 13/01/2020
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3. Nutrient Release, Plant Nutrition, and Potassium Leaching from Polymer-Coated Fertilizer
ABSTRACT The increase in food consumption and limitations in food production areas requires improved fertilizer efficiency. Slow- or controlled-release fertilizers are an alternative for synchronizing nutrient availability with the plant demands, reducing losses to the environment. The aim of this study was to evaluate the efficacy of polymer-coated KCl comp
Rev. Bras. Ciênc. Solo. Publicado em: 27/03/2017
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4. Association of swine wastewater and mineral fertilization on black oat production
ABSTRACT Swine wastewater (SW) has high organic load, becoming an important source of macro and micronutrients to plants, promoting the improvement of soil quality and development in various cultures. However, when done without agronomic and environmental criteria, it can cause soil problems, nutrient leaching, water resource damage and plant toxicity. The o
Eng. Agríc.. Publicado em: 2016-10
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5. GESSO AGRÍCOLA E ADUBAÇÃO NITROGENADA NA CULTURA DO MILHO EM SISTEMA PLANTIO DIRETO
A considerably part of the high nitrogen (N) rates applied in corn is not absorbed due root growth restriction by subsoil acidity. Gypsum is able to improve conditions for root growth and lead to greater N uptake efficiency, increasing corn yield. Thus to evaluate the effect of gypsum and N on top dressing on soil chemical attributes, root growth , mineral n
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 10/11/2012
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6. Impacts of doses and split fertilization on productivity, leaching and nutrient cycling in eucalypt plantation / Impactos das doses e do parcelamento da fertilização na produtividade, lixiviação e ciclagem de nutrientes em plantações de eucalipto
No Brasil, está ocorrendo a expansão da área florestal plantada com espécies do gênero Eucalyptus, sendo que a elevada produtividade pode ser atribuída às pesquisas e melhorias operacionais introduzidas nas ultimas décadas. Nos experimentos realizados em diferentes regiões do Brasil, tem se observado maior incremento dos eucaliptos com o aumento das
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 14/12/2011
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7. High coffee population to improve fertility of an oxisol.
The objective of this work was to evaluate the effect of coffee (Coffea arabica L.) population densities on the chemical and microbiological properties of an Oxisol. The work was carried out on soil samples of 0-20 cm depth originated from an experimental site which had been used for coffee tree spacing studies during 15 years, in Parana State, Brazil. Eight
Pesquisa Agropecuaria Brasileira. Publicado em: 2011
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8. Potassium doses and frequency of application to alfalfa in tropical soil.
Providing an adequate supply of nutrients is important for alfalfa production and is essential to maintain high quality and profitable yields. Potassium fertilization is essential for alfalfa production (Rassini and Freitas, 1998) and is the most common nutrient input for this crop in the high weathered, low-fertile and acids soils of tropical regions. High-
INTERNATIONAL PLANT NUTRITION COLLOQUIUM. Publicado em: 2011
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9. Establishment of recommendations and parameters for use of urban waste compost in agriculture in the State of Sao Paulo - Brazil.
The organic matter present in urban waste (45 to 60% of total dry mass), after being stabilized in the form of compost, is recommended for application in agricultural soils, since it improves its physical and chemical properties and benefits the soil biological processes. Also, the urban waste compost has been economically viable for application in agricultu
INTERNATIONAL ORBIT CONFERENCE. Publicado em: 2011
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10. Monitoring of potassium in a culture of irrigated bell pepper in semiarid region / Monitoramento do potássio em um cultivo de pimentão irrigado em região semiárida / Monitoramento do potássio em um cultivo de pimentão irrigado em região semiárida / Monitoramento do potássio em um cultivo de pimentão irrigado em região semiárida / Monitoring of potassium in a culture of irrigated bell pepper in semiarid region / Monitoring of potassium in a culture of irrigated bell pepper in semiarid region
The bell pepper is of high importance within the vegetable crops, thus becoming an alternative source of income for small producers and family farms. Potassium is the nutrient most absorbed by bell pepper and diffusion the main transport mechanism to the roots, although the mass flow can have significant contribution in the process under high potassium conce
Publicado em: 2010
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11. ProduÃÃo de massa seca e percolaÃÃo de nutrientes em solos de texturas distintas em funÃÃo de doses de dejeto lÃquido suÃno / Dry matter production and nutrient leaching in soils of distinct textures in function of levels of pig slurry
No Brasil, a suinocultura à uma importante atividade econÃmica, porÃm predominante de pequenas propriedades rurais. No ParanÃ, vem tendo atenÃÃo especial em razÃo dos problemas ambientais causando a poluiÃÃo do solo e das Ãguas. Dentre as alternativas para se solucionar tais problemas propÃe-se a reciclagem agrÃcola em sistemas de produÃÃo vege
Publicado em: 2010
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12. Relações solo-vegetação no Parque Nacional da Serra do Cipó, Espinhaço Meridional, Minas Gerais / Soil vegetation relationships in the National Park Serra do Cipó, in Espinhaço Meridional, Minas Gerais
The region of Serra do Rio Cipó, in the southern part of the Serra do Espinhaço, comprises large areas of Cerrado, Atlantic forest, forest islands and one of the richest high-altitude rocky vegetation in Brazil. The ecotonal character between the Cerrado and Atlantic Forest biomes, described in many studies of regional flora and fauna, is one of the factor
Publicado em: 2009