Phosphorus Fractionation
Mostrando 1-12 de 29 artigos, teses e dissertações.
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1. ORGANIC MATTER AND SOIL FERTILITY IN DIFFERENT SUCCESSIONAL STAGES OF SEASONAL SEMIDECIDUAL FOREST
RESUMO O acúmulo e as transformações da matéria orgânica do solo são fundamentais para a manutenção e melhoria dos atributos químicos, físicos e biológicos do solo, e, consequentemente, para o funcionamento das florestas tropicais. O objetivo deste estudo foi avaliar a influência de florestas secundárias com diferentes estádios sucessionais na
Rev. Caatinga. Publicado em: 09/05/2019
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2. Phosphorus Forms in Sediments as Indicators of Anthropic Pressures in an Agricultural Catchment in Southern Brazil
ABSTRACT Phosphorus (P) fractionation is a suitable procedure to ascertain P lability in sediments and is able to distinguish sources of P under different soil management practices in a catchment. Brazil is the second largest producer and the largest exporter of tobacco in the world. Inadequate management of cultivated areas exposes the soil to erosion proce
Rev. Bras. Ciênc. Solo. Publicado em: 04/12/2017
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3. Phosphorus fractions in apple orchards in southern Brazil
ABSTRACT Phosphorus (P) applications at dosages higher than the necessary may cause P buildup in the soil labile fractions and, consequently, pollution of water sources. This study aimed to assess accumulation of P fractions as well as the parameters of adsorption isotherms in soil profiles having a history of application of phosphate fertilizers and cultiva
Bragantia. Publicado em: 29/05/2017
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4. Release of Phosphorus Forms from Cover Crop Residues in Agroecological No-Till Onion Production
ABSTRACT Cover crops grown alone or in association can take up different amounts of phosphorus (P) from the soil and accumulate it in different P-forms in plant tissue. Cover crop residues with a higher content of readily decomposed forms may release P more quickly for the next onion crop. The aim of this study was to evaluate the release of P forms from res
Rev. Bras. Ciênc. Solo. Publicado em: 13/02/2017
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5. Phosphorus fractions in soil with a long history of organic waste and mineral fertilizer addition
ABSTRACT Applications for long periods of organic animal waste as a source of nutrients to crops can contaminate the soil and the surface and subsurface waters. This study aimed to evaluate how the utilization of organic waste, after successive applications, affects P fractions in the soil and consequently environmental contamination. In an experiment conduc
Bragantia. Publicado em: 30/01/2017
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6. DinÃmica de fÃsforo em manguezais impactados por Ãguas residuÃrias no Estado do CearÃ. / Dynamics of phosphorus in mangroves impacted by the state of CearÃ.
Recent studies demonstrated the efficacy of mangrove retaining nutrients and, in particular, the ability of the mineral component of the buffer in its high soil phosphorus levels. In general, the mangroves have been considered as important sinks of nutrients due to its high capacity purification of effluents. However, depending on the geochemical conditions
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 26/06/2012
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7. Rhizosphere pH and phosphorus forms in an Oxisol cultivated with soybean, brachiaria grass, millet and sorghum
Plants have shown different responses to fertilization with rock phosphate, including responses through alteration of the attributes of rhizospheric soil. The objective of this study was to evaluate soil pH alterations and alterations in the contents of forms of phosphorus in the rhizosphere of soil fertilized with rock phosphate as a result of cultivation o
Sci. agric. (Piracicaba, Braz.). Publicado em: 2012
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8. DINÂMICA DO FÓSFORO EM SOLO MUITO ARGILOSO SOB DIFERENTES PREPAROS DE SOLO E CULTURAS DE INVERNO / DYNAMICS OF PHOSPHORUS IN VERY CLAYEY SOIL UNDER DIFFERENT SOIL MANAGEMENT SYSTEM AND WINTER CROPS
O cultivo de plantas com diferentes habilidades de aquisição e absorção de fósforo (P) sob diferentes sistemas de preparo de solo por um longo período de tempo pode alterar a ciclagem e a distribuição das formas de P no solo. O objetivo do presente trabalho foi avaliar a dinâmica do P num solo muito argiloso de região subtropical, originalmente cob
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/02/2011
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9. Fontes de fósforo na produção e composição bromatológica de cultivares de milheto forrageiro / Phosphorus sources in production and chemical composition of the peral millet forage
A produção de massa seca e aspectos qualitativos de milheto forrageiro ainda são pouco conhecidos, assim como informações específicas dessa gramínea manejada com fertilização fosfatada e nitrogenada. Foi conduzido experimento para avaliar o potencial produtivo e composição bromatológica da massa seca de três cultivares de milheto (Pennisetum gla
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 12/04/2010
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10. Fontes de fósforo na produção e composição bromatológica de cultivares de milheto forrageiro / Phosphorus sources in production and chemical composition of the peral millet forage
The dry matter yield and quality aspects of forage millet are still poorly understood, as well as specific information handled by this grass and nitrogen fertilization. Experiment was conducted to evaluate the productive potential and chemical composition of the dry mass of three cultivars of pearl millet (Pennisetum glaucum (L.) R. Brown) (ADR-7010, ADR- 50
Publicado em: 2010
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11. Phosphorus dynamics and availability in soils cultivated with production coffee plants, / DinÃmica e disponibilidade de fÃsforo em solos cultivados com cafeeiro em produÃÃo
During many years coffee (Coffee arabica L.) plants have been considered low responsive to phosphorus fertilization. However, recent research data show that these plants demand high phosphorus quantity to fully develop their vegetative and reproductive systems. Aiming to know how phosphorus availability is influenced by annual P doses and how they may influe
Publicado em: 2009
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12. PHOSPHORUS DINAMICS OF SEDIMENTS FROM A SMALL WATERSHED / DINÂMICA DO FÓSFORO DE SEDIMENTOS DE UMA PEQUENA BACIA HIDROGRÁFICA DE CABECEIRA
A pressão sobre os recursos naturais vem mostrando-se mais intensa nas últimas décadas, gerando degradação do ar, do solo e da água em todo o mundo. Dentre as substâncias relacionadas aos impactos ambientais aquelas contendo fosfatos são de grande importância, sendo originário de descargas industriais, domésticas, e agrícola. Esta última contrib
Publicado em: 2009