Resumo

SANCHEZ, Tania et al. Nutritive value of the forage components of an association of improved grasses and Leucaena leucocephala. Pastos y Forrajes [online]. 2008, vol.31, n.3, pp. 1-1. ISSN 0864-0394.

In a dairy unit of the Genetic Enterprise of Matanzas, with the objective of determining some indicators of the nutritive value in the forage components of an association of improved grasses (Cynodon nlemfuensis and Panicum maximum) and Leucaena leucocephala cv. Cunningham under commercial conditions, the most representative species of the floristic composition were selected and evaluated by the in situ degradation of dry matter and the in vitro gas production technique regarding the sampling moment. Significant differences were found when comparing the dry matter degradation of P. maximum cv. Likoni and L. leucocephala after 48 and 72 hours (P<0,05). The highest values of dry matter degradation rate (0,0306-0,3347% h-1 and 0,0329­0,0407% h-1 for the DS an RS, respectively) and gas production (0,024-0,044 h-1 and 0,032-0,049% h-1 in the DS and RS, respectively) were obtained in the rainy period. It is concluded that the dry matter degradation by means of the in situ technique and the evaluation of the energy potential through gas production, showed a better performance of the forages during the sampling moment that corresponded to the rainy season and the highest degradation rate was obtained in leucaena.

Palavras-chave : Grasses; Leucaena leucocephala; nutritive value.

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