Resumo

SIMON, L  e  LOPEZ, O. Dairy performance of Holstein x Zebu genotypes under silvopastoral system conditions. Pastos y Forrajes [online]. 2009, vol.32, n.3, pp. 1-1. ISSN 0864-0394.

With the objective of evaluating the bioproductive and economic potential of herds from different double purpose racial genotypes (Holstein x Zebu) in associations of legume trees with grasses, three dairy units were selected with 80 cows each, including the genotypes Mambí (3/4 H x ¼ Z), Siboney (5/8 H x 3/8 Z) and F1 (1/2 H x ½ Z), respectively. Dry matter availability of the pastures and intake of complementary feedstuffs were determined, as well as the productive indicators of the herds and the incomes. No remarkable differences were found among herds regarding DM availability and contribution of pasture to the diet. Values of whole milk production of 7,2; 6,8 and 6,7 and corrected milk values of 9,1; 9,3 and 9,8 kg/cow/day were obtained for the breeds Mambí, Siboney and F1, respectively. Milk sale prices were higher than 90 cents in the three herds, with profits higher than 10 000 pesos. It is concluded that there were no noticeable differences, in terms of milk production, among genotypes; the economic differences in favor of genotype F1 are given by its rusticity and adaptation to the grazing environment. On the other hand, the productive sustainability of the rational silvopastoral system technology during 10 years of exploitation was proven.

Palavras-chave : Producción de leche; sistemas silvopascícolas.

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