Data/hora: 11/06/2024 09:10:57

Provedor de dados: | 64
País: | Brazil
Título: | P-sorption and desorption in Savanna Brazilian soils as a support for phosphorus fertilizer management
Autores: | Pinto,Flávio Araújo; Souza,Edicarlos Damacena de; Paulino,Helder Barbosa; Curi,Nilton; Carneiro,Marco Aurélio Carbone.
Data: | 2013-12-01
Ano: | 2013
Palavras-chave: | Phosphorus adsorption capacity; Langmuir; Soil fertility management; Correction of P deficiency.
Resumo: | Phosphorus (P) sorption by soils is a phenomenon that varies depending on soil characteristics, influencing its intensity and magnitude, which makes it a source or drain of P. The objective of this study was to determine the Maximum Phosphorus Adsorption Capacity (MPAC) and desorption of P from soils under native Savanna Brazilian and verify the correlation between MPAC and P Capacity Factor (PCF) with the chemical and physical properties of these soils. The study was conducted in seven soils under native Savannas. The Langmuir isotherms were adjusted from the values obtained in sorption assays, being evaluated the MPAC, the energy adsorption (EA) and PCF, which was calculated according to the levels of P-adsorbed and P-sorbed. Values of MPAC were classified as high in most soils, ranging from 283 up to 2635 mg kg-1 of P in the soil and were correlated with soil organic matter, clay, silt, sand, base saturation and pH. The PCF was higher in soils where the MPAC was also higher. The use of only one attribute of soil (clay content) as a criterion for the recommendation of phosphated fertilization, as routinely done, is susceptible to errors, needing the use of more attributes for a more accurate recommendation, as a function of the complexity of the interactions involved in the process.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542013000600005
Editor: | Editora da Universidade Federal de Lavras
Relação: | 10.1590/S1413-70542013000600005
Formato: | text/html
Fonte: | Ciência e Agrotecnologia  v.37 n.6 2013
Fonte: | info:eu-repo/semantics/openAccess