Phosphorus adsorption in ten soils from Pernambuco State and its relations with physical and chemical parameters - doi: 10.4025/actasciagron.v33i1.3129

• Autor(a) principal: Corrêa, Rossini Mattos
• Data de Publicação: 2011
• Outros Autores: Nascimento, Clístenes Williams Araújo do, Rocha, Alexandre Tavares da
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Acta Scientiarum. Agronomy (Online)
• Texto Completo: http://www.periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/3129
• topic: phosphorus fixation; Langmuir; Freundlich; fixação de fósforo; Langmuir; Freundlich; Fertilidade do Solo e Adubação

An experiment was carried out to study phosphorus (P) adsorption in ten soil samples from Pernambuco State, Northeastern Brazil. The relationship between physical and chemical soil attributes and P adsorption isotherms were also evaluated. The results showed that maximum phosphorus adsorption capacity (MPAC), remaining P (Rem-P) and the k constant of the Freundlich equation are reliable variables to characterize P adsorption by the soils. Due to its easy determination, Rem-P is the best indicated variable. The parameters of P adsorption MPAC, Rem-P and the k constant of the Freundlich equation showed correlation (p < 0.01) with the chemical attributes potential acidity (H+Al), exchangeable aluminum (Al), exchangeable cation capacity (ECC) and with the physical attributes clay and field capacity (FC). The variables FC, Rem-P, H+Al, Al, ECC and clay, among the chemical and physical attributes evaluated, allowed estimating the MPAC value on the studied soils. The P adsorption energy and the n constant of the Freundlich isotherm were not reliable indicators of the P soil adsorption power.