@article{Arias_Combellas_2005, title={NR 31. Influence of poultry litter supplementation on productive response of heifers grazing Brachiaria humidicola}, volume={5}, url={https://ojs.alpa.uy/index.php/ojs_files/article/view/124}, abstractNote={<p>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&lt;.05), of 0.307 and 0.280 kg/day during the second period (P &lt; .05) and 0.311 and 0.337 kg/day (P&gt;.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&gt;.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.</p&gt;}, number={3}, journal={Archivos Latinoamericanos de Producción Animal}, author={Arias, A. and Combellas, Jorge}, year={2005}, month={Feb.} }