PHOSPHORUS ADSORPTION IN SOILS OF TROPICAL REGIONS

• Autor(a) principal: Vinha, Ana Paula Carrara
• Data de Publicação: 2023
• Outros Autores: Carrara, Bruna Helena, Souza, Emanuella Farias Santos, Santos, Jussane Antunes Fogaça dos, Arantes, Sayonara Andrade C.Moreno
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Nativa (Sinop)
• Texto Completo: https://periodicoscientificos.ufmt.br/ojs/index.php/nativa/article/view/10973
• topic: Latossolo Vermelho Amarelo; Neossolo Quartzarênico; Isotermas de adsorção

Phosphorus (P) is the most limiting nutrient for cultivation in tropical soils, as they generally have high phosphorus adsorption capacity. Some chemical and physical attributes of soil such as clay content, pH, effective cation exchange capacity (ECEC) and organic matter influence the adsorption dynamics. The objective of this study was to evaluate the behaviour of the phosphorus adsorption process in a Red-Yellow Oxisol and a Typic Quartzipisamment from the Cerrado-Amazon transition region, and to evaluate the soil attributes that influence the adsorption dynamics of the soil of the phosphorus. Chemical and physical characterization and Langmuir isotherm construction were performed by the “Bach” method. From the Langmuir linearized equation, the maximum P adsorption capacity (MPAC), the constant with the binding energy (KB) and the maximum capacity factor (PCFmax) were selected. There was a difference in MPAC, KB and PCFmax of the studied soils, and the highest values ​​were found in the Red-Yellow Oxisol, mainly due to the higher clay content in relation to theTypic Quartzipisamment. Organic matter was one of the few attributes that had a negative correlation with the adsorption attributes, highlighting (emphasizing) it’s importance in (soil) management to increase the efficiency of phosphate fertilization.