Data/hora: 13/06/2024 00:57:33

Provedor de dados: | Pesquisa Agropecuária Brasileira
País: | Brazil
Título: | Remaining phosphorus content to determine phosphorus availability of the soils in Rio Grande do Sul
Autores: | Rogeri,Douglas Antonio; Bortolon,Leandro; Gianello,Clesio; Amorim,Magno Batista.
Data: | 2017-12-01
Ano: | 2017
Palavras-chave: | Clay content; Phosphate buffer capacity; Phosphate fertilization; Phosphorus adsorption; Soil test.
Resumo: | Abstract: The objective of this work was to evaluate remaining P compared with soil clay content as a P buffer index to classify P extracted by the Mehlich-1 (M1) and Mehlich-3 (M3) methods in soils from the state of Rio Grande do Sul, Brazil. The experiment was carried out in a completely randomized design with five P2O5 rates (0, 50, 100, 200, and 400 mg kg-1) and two sucessive corn crops, and three replicates, in 20 representative soils of the state. P extracted by M1 and M3 before crop planting was adjusted to P contents in biomass, considering soil buffer capacity. The division of soils into different buffering classes, based on soil clay or remaining P, improved the capacity of estimating soil available P of both methods. However, there was no difference among the correlation coefficients obtained by classifying soils according to the evaluated indexes (remaining P or soil clay) for both M1 and M3 methods. Remaining P is a viable alternative to replace soil clay content to classify soil P extracted with the M1 and M3 methods.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2017001201203

Editor:

Embrapa Secretaria de Pesquisa e Desenvolvimento

Pesquisa Agropecuária Brasileira

Relação: | 10.1590/s0100-204x2017001200009
Formato: | text/html
Fonte: | Pesquisa Agropecuária Brasileira  v.52 n.12 2017
Fonte: | info:eu-repo/semantics/openAccess