Dinâmica do fósforo em diferentes sistemas de manejo do solo

• Ano de defesa: 2011
• Autor(a) principal: Cândido, Clebson Santos
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: UEMA; Brasil; Campus São Luis Centro de Ciências Agrárias – CCA; Centro de Ciências Agrárias; PROGRAMA DE PÓS-GRADUAÇÃO EM AGROECOLOGIA
• Palavras-chave em Português: Phosphorus forms - soil; Phosphorus fractionation; Cultivation systems; Phosphorus in the soil; Sequential extraction method; Phosphorus fractionation method; Agricultural soils - phosphorus; Direct planting; Formas de fósforo - solo; Fracionamento de fósforo; Sistemas de cultivo; Fósforo no solo; Método de extração sequencial; Método de fracionamento de fósforo; Solos agrícolas - fósforo; Plantio direto; Agroecologia
• Link de acesso: http://repositorio.uema.br/handle/123456789/190

The forms and availability of phosphorus vary with the soil characteristics and properties.The objective of this study was, by sequential extraction, changes in forms of P in the soil under no-tillage system under alley cropping with six years of implementation; tillage in alley cropping with three years of implementation; pasture area, area of soil with tillage, and an area of scrub. The P fractionation method developed by Hedley et al. (1982) was efficient to evaluate the effects of management changes in the dynamics of the forms of P in the soil. Results showed that in the alley cropping system were predominant forms of inorganic labile and moderately of P. Higher fractions of organic phosphorus (Po) were found in the system of cultivation under pasture.