Data/hora: 13/06/2024 03:51:28

Provedor de dados: | 90
País: | Brazil
Título: | Liming influence on soil chemical properties, nutritional status and yield of alfalfa grown in acid soil
Autores: | Moreira,Adônis; Fageria,Nand Kumar.
Data: | 2010-08-01
Ano: | 2010
Palavras-chave: | Medicago sativa L.; Shoot dry matter; Nodulation; Soil acidity; Nutrient uptake.
Resumo: | Alfalfa is an important forage crop with high nutritive value, although highly susceptible to soil acidity. Liming is one of the most efficient and prevailing practices to correct soil acidity and improve alfalfa yield. The objective of this study was to evaluate response to liming of alfalfa grown in a greenhouse on a Typic Quartzipsamment soil. The treatments consisted of four lime rates (0, 3.8, 6.6 and 10.3 Mg ha-1) and two cuts. Alfalfa dry matter increased quadratically with increasing lime rates. In general, dry matter yield was maximized by a lime rate of 8.0 Mg ha-1. Except for the control, the dry matter nutrient contents in the treatments were adequate. The positive linear correlation between root and nodule dry matter with lime rates indicated improvement of these plant traits with decreasing soil acidity. The soil acidity indices pH, base saturation, Ca2+ concentration, Mg2+ concentration, and H + Al were relevant factors in the assessment of alfalfa yield. The magnitude of influence of these soil acidity indices on yield as determined by the coefficient of determination (R²) varied and decreased in the order: base saturation, H + Al, pH, Ca and Mg concentrations. Optimum values of selected soil chemical properties were defined for maximum shoot dry matter; these values can serve as a guideline for alfalfa liming to improve the yield of this forage on acid soils.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832010000400022
Editor: | Sociedade Brasileira de Ciência do Solo
Relação: | 10.1590/S0100-06832010000400022
Formato: | text/html
Fonte: | Revista Brasileira de Ciência do Solo  v.34 n.4 2010
Fonte: | info:eu-repo/semantics/openAccess