NR 31. Influence of poultry litter supplementation on productive response of heifers grazing Brachiaria humidicola

  • A. Arias Universidad Central de Venezuela, Maracay
  • Jorge Combellas Universidad Central de Venezuela, Maracay


An experiment was carried out to evaluate the influence of the supplementation with poultry litter on the productive response of cattle receiving a low quality fibrous diet. It was located in a commercial farm at San José de Tiznados, Guárico State, with heifers grazing Brachiaria humidicola. Fifty eight crossbred Brahman heifers of 21/2 years were balanced for weight and distributed in two treatments, Treatment T1: grazing alone and Treatment T2: grazing plus 1 kg/day of supplement offered during three hours daily. The experiment was carried out from march to june 1995. The pasture had 4.6 % crude protein, 0.18 % calcium and 0.09 % phosphorus and the DM disappearance at 48h in nylon bags was 41.9 %. There were two periods with different consumptions of supplement. In March-April the average intake was 0.077 kg/day and in May and June the intakes were of 0.39 and 0.58 kg/day. Live weight gains (LWG) in T1 and T2 were of 0.51 and 0.189 kg/day during the first period (P<.05), of 0.307 and 0.280 kg/day during the second period (P < .05) and 0.311 and 0.337 kg/day (P>.05) during the 40 days after the end of the trial. Pregnancy rate at the end of the mating season at the end of August was 96.4 and 86.1 % in T1 and T2 respectively (P>.05). The results of this experiment pointed out that the quality and quantity offered of the base diet at the start of the rainy season (May-June) were sufficient to sustain an adequate rate of conception, independent of the slight increase in LWG obtained with the supplement at the end of the dry season.


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How to Cite
Arias, A., and Jorge Combellas. 2005. “NR 31. Influence of Poultry Litter Supplementation on Productive Response of Heifers Grazing Brachiaria Humidicola”. Archivos Latinoamericanos De Producción Animal 5 (3).