Título:	Crop growth response and dynamics of inorganic phosphorus fractions after application of reactive Arad phosphate rock in Oxisol with different land use histories.
Autoria:	LACERDA, J. J. de J. FURTINI NETO, A. E. RESENDE, A. V. de SANTOS, J. Z. L. dos CARNEIRO, L. F. OLIVEIRA, C. H. C. de
Afiliação:	JULIAN JUNIO DE JESUS LACERDA, UFLA; ANTONIO EDUARDO FURTINI NETO, UFLA; ALVARO VILELA DE RESENDE, CNPMS; JOSE ZILTON LOPES DOS SANTOS, Universidade Federal do Amazonas; LEANDRO FLAVIO CARNEIRO, UFG; CESAR HENRIQUE CAPUTO DE OLIVEIRA, UFLA.
Ano de publicação:	2013
Referência:	African Journal of Agricultural Research, v. 8, n. 26, p. 3454-3461, July 2013.
Conteúdo:	Adsorbed or precipitated phosphorus can be susceptible to dissolution depending upon environmental conditions. This work evaluated both the partitioning and availability of the inorganic forms of P bound to Al, Fe and Ca in samples of a clayey Dystrophic Red Latosol (Oxisol) (DRL) with different land use history, fertilized with Arad reactive natural phosphate in Goias State, Brazil. The inorganic fractions of Al- P, Fe-P and Ca-P and the contents of Mehlich-1, ion-exchange resin, citric acid and Olsen extracted available P were determined in DRL. Plants grown in soil previously cultivated produce more beans than plants grown in soil not previously cultivated. The fractions Al-P and Fe-P represent the main inorganic forms in clayey DRL, being phosphorus availability closely related with the fraction Al-P. The distributions of the inorganic fractions of P in the soil fertilized with reactive phosphate were Fe-P = 45%, Al-P = 40% and Ca-P = 15%. The phosphorus content determined by alkaline extraction (Olsen Method) was closely related to levels of Al-P and Fe-P. On other hand, the concentrations determined by extracting acids (Mehlich-1 and citric acid) were more related to the Ca-P fraction. Fe-P and Al-P inorganic forms stocked over time with successive fertilizations in Oxisol with a history of cultivation in no-tillage may return to soil solution and provide the nutrient demand of plants.
Thesagro:	Solo Fósforo Cerrado
Palavras-chave:	Adubação fosfatada
Digital Object Identifier:	10.5897/AJAR2013.6855
Tipo do material:	Artigo de periódico
Acesso:	openAccess
Aparece nas coleções:	Artigo em periódico indexado (CNPMS)