SciELO - Scientific Electronic Library Online

 
vol.25 número3Doses e modos de adubação com manganês e seus efeitos na produção da cultura do arrozEfeito de sistemas de produção de grãos e de pastagens sob plantio direto sobre o nível de fertilidade do solo após cinco anos índice de autoresíndice de assuntospesquisa de artigos
Home Pagelista alfabética de periódicos  

Serviços Personalizados

Journal

Artigo

Indicadores

Links relacionados

Compartilhar


Revista Brasileira de Ciência do Solo

versão On-line ISSN 1806-9657

Resumo

CASSOL, P. C.; GIANELLO, C.  e  COSTA, V. E. U.. Phosphorus fractions in manures and their efficiency as phosphate fertilizer. Rev. Bras. Ciênc. Solo [online]. 2001, vol.25, n.3, pp.635-644. ISSN 1806-9657.  http://dx.doi.org/10.1590/S0100-06832001000300012.

Manures used as phosphorus sources may have different efficiencies from those of commercial soluble fertilizers. These efficiencies may vary according to the manure origin and to the proportions of its total P in different chemical fractions. A greenhouse experiment was conducted in order to estimate the efficiencies of dairy cattle and chicken manures as phosphorus source, in comparison to triple superphosphate (TSP), as well as to relate these efficiencies to their P fractions. The treatments were: control, without fertilizer or manure; three rates of P, applied as TSP (6.6, 13.2 and 19.7 mg kg-1 soil); and a single phosphorus application rate of 15.3 mg kg-1 soil, from 11 samples of both cattle and chicken manures. Treatment responses were evaluated cultivating millet during 27 days after P application, in pots filled with a Kandiudult soil. Manure P fractions were determined by sequential extractions. The Efficiency Index (EI), estimated by the TSP equivalence, was 0.84 ± 0.071 for chicken manure, significantly lower than that for cattle manure, 0.94 ± 0.095. There were no statistical differences in EI among manures samples of the same animal species. Considering all samples, EI was positively correlated with proportions of labile P (extracted with resin and NaHCO3) and total inorganic P and negatively correlated with proportions extracted with NaOH and HCl and with total organic P. There was no association between EI and the total P content in the manures.

Palavras-chave : organic fertilizer; phosphate; efficiency; fractions; waste.

        · 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