Data/hora: 21/06/2024 00:34:38

Biblioteca(s): | Embrapa Amazônia Ocidental; Embrapa Arroz e Feijão.
Data corrente: | 18/10/2010
Data da última atualização: | 11/03/2021
Autoria: | MOREIRA, A.; FAGERIA, N. K.
Afiliação: | ADONIS MOREIRA, CPAA; NAND KUMAR FAGERIA, CNPAF.
Título: | Liming influence on soil chemical properties, nutritional status and yield of alfafa grown in acid soil.
Ano de publicação: | 2010
Fonte/Imprenta: | Revista Brasileira de Ciência do Solo, Viçosa, MG, v. 34, n. 4, p. 1231-1239, jul./aug. 2010.
Idioma: | Inglês
Conteúdo: | 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.
Thesagro: | Absorção de nutrientes; Acidez do solo; Alfafa; Matéria seca; Medicago sativa; Nodulação; Solo.

Categoria do assunto:

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F Plantas e Produtos de Origem Vegetal

URL: | http://ainfo.cnptia.embrapa.br/digital/bitstream/item/172092/1/22.pdf
Registro original: | Embrapa Amazônia Ocidental (CPAA)

Exemplares:

CNPAF - (30109-1) - UPC - AP - PP - 2010 -  - 2010 - DIS
CPAA - (22988-1) - UPC - AP - PP - S8764 -  - S8764 - DIS