AVAILABILITY OF PHOSPHORUS FROM NATURAL PHOSPATES ON SAVANNAH SOILS AND ITS EVALUATION BY CHEMICAL EXTRACTANTS

Authors

  • Elihu de Almeida Santos
  • Huberto José Kliemann

Keywords:

Brazilian savannah, phosphate sources, chemical extractants

Abstract

A greenhouse experiment with soils from five Brazilian savannah (cerrado) sites – Alfisol (PVAe), Oxisol (LVd, LVdf, LVAd), and Quartzipsamment (RQo) – was carried out and phosphorus availability from natural phosphatic fertilizers (Arad phosphate – Israel; phosphoric bauxite – Senegal; and Araxá phosphate – Brazil) was evaluated. The Mehlich-1, Mehlich-3 and resin extractants were used. A completely randomized design with eleven treatments and three replications was used. Response curves with triple superphosphate (TSP) and inclusion of phosphatic sources were used, with millet (Pennisetum thyphoides) as testing crop. Obtained data showed that: (i) the applied phosphates showed higher efficiency on dystrophic Oxisols than on the sandy soil (Quartzipsamment); (ii) Arad and Phospal phosphates are good alternatives as phosphorus suppliers for savannah soils and crops; (iii) Mehlich-1, Mehlich-3, and resin extractants showed equivalent performance on the estimation of soil available P, applied as triple superphosphate.

KEY-WORDS: Brazilian savannah; phosphate sources; chemical extractants.

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Author Biography

Elihu de Almeida Santos

Fundação de Ensino Superior de Rio Verde (Fesurv), Caixa Postal 104, CEP 75900-000 Rio Verde, GO. E-mail: elihu@fesurv.br

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Published

2007-10-30

How to Cite

SANTOS, E. de A.; KLIEMANN, H. J. AVAILABILITY OF PHOSPHORUS FROM NATURAL PHOSPATES ON SAVANNAH SOILS AND ITS EVALUATION BY CHEMICAL EXTRACTANTS. Pesquisa Agropecuária Tropical [Agricultural Research in the Tropics], Goiânia, v. 35, n. 3, p. 139–146, 2007. Disponível em: https://revistas.ufg.br/pat/article/view/2214. Acesso em: 22 dec. 2024.

Issue

v. 35, n. 3, Sep./Dec. 2005

Section

Research Article

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