Desempenho produtivo de ovinos confinados submetidos a dietas com níveis crescentes de torta de girassol.

Abstract

The objective was to evaluate the effects of inclusion of sunflower cake in the diet of lambs in confinement on intake, digestibility, performance and economic analysis of lambs. The experiment was conducted in Aristophanes Fernandes Exhibition Centre, in the city of Parnamirim / RN, over a period of 60 days. 36 crossbred animals were used Santa Inês x Dorper, distributed in four treatments: 0%, 5%, 10% and 15% of sunflower cake inclusion in the diet. Was evaluated daily consumption of DM, OM, MM, CP, EE, NDF, TDN and energy, by-offered plenty of difference, as well as the apparent digestibility of nutrients and feeding behavior of the animals. The performance of the animals body was analyzed through the weight gain data obtained by weekly weighing, and ultimately obtained TWG, DAG and feed conversion. For system economic indicators, it calculated the gross income by the sum of proceeds from the sale of carcasses and no constituent of carcasses, gross margin as the difference between total operating costs-gross income and the cost / benefit of each treatment. The consumption per% BW in gDM / kg of BW and NFC intake showed statistical variation for the inclusion of the pie in the diet, other nutrients DM, OM, MM, CP, EE, NDF, TDN and DE did not differ, but remained according to the analysis of diets, as well as water intake did not differ but remained within the optimal parameters. The animals showed no behavioral differences intake of diet and the digestibility, only CDNFC that differ between levels. Corroborating this result the body animal performance was satisfactory for IW, DAG, CF and WF, with changes only in the WT, but all remained at the ideal weight for slaughter. The economic analysis showed most cost-effective in terms of inclusion of 5% of the pie in MS diets. It can add the sunflower cake in the diet of sheep up in accordance with this research to the level of 15%, and up to the level of 5% the best benefit / cost system.