SciELO - Scientific Electronic Library Online

vol.35 número1Avaliação da atividade antifúngica do óleo essencial de Pittosporum undulatum L. em Aspergillus flavus e produção de aflatoxinaFitorremediação de solos contaminados com arsênio (As) utilizando braquiária índice de autoresíndice de assuntospesquisa de artigos
Home Pagelista alfabética de periódicos  

Serviços Personalizados




Links relacionados


Ciência e Agrotecnologia

versão impressa ISSN 1413-7054


BROGGI, Fábio et al. Phosphate capacity factor in mineralogically different soils in Pernambuco and the influence of pH on the maximum capacity of adsorption. Ciênc. agrotec. [online]. 2011, vol.35, n.1, pp.77-83. ISSN 1413-7054.

Phosphate Maximum Capacity (FCP) is defined by the ratio of equilibrium between the amount of factor P (Q) and factor intensity (I) and represents a measure of the soil ability to maintain a certain level of P in solution. The characteristics and content of the constituents of clay minerals are responsible for a greater or lesser FCP, interfering in soil-plant relations. Moreover, the soil pH has affected adsorption, and in other cases, it has shown small and inconsistent change in the maximum adsorption capacity of P (CMAP). Thus, this study aimed to determine the different FCP soil mineralogy in Pernambuco; to correlate physical and chemical characteristics of soils with PBC and to evaluate the effect of pH on the CMAP. Subsurface soil samples from four different soils were characterized chemically and physically determined, and the PBC was determined. These samples were corrected with CaCO3 and MgCO3 in a 4:1 ratio and incubated for 30 days, except the Vertisol. The CMAP was determined before and after correction of the soil. The experiment consisted of a 4 x 2 factorial (four soils with and without correction), distributed in randomized blocks with three replicates. Soil characteristics that best reflected the PBC were the remaining P (P-rem) and MPAC. Regardless of the constituents of clay mineralogy, soil with high aluminum levels had increased CMAP after correction. The energy of adsorption (EA) in the limed soils was on average significantly lower, regardless of the soil.

Palavras-chave : Phosphorus adsorption; phosphate buffer power; CMAP.

        · resumo em Português     · texto em Português     · Português ( pdf )


Creative Commons License Todo o conteúdo deste periódico, exceto onde está identificado, está licenciado sob uma Licença Creative Commons