Resíduo agroindustrial de girassol na alimentação de ovinos

Abstract

In more intensive sheep production systems, feed is the main item of operating cost, so the use of alternative feed sources at a lower cost compared to traditional and nutritious foods can improve the profitability of the activity. The objective of this study was to evaluate the intake, digestibility and nitrogen balance of confined sheep, with the inclusion of sunflower agroindustrial residue in substitution of corn silage in the diet. Experimental diets were formulated with 40: 60 V / C ratio, sunflower residue inclusion levels were 0; 13.3; 26.7 and 40.0% MS. Inclusion levels did not affect dry matter (DM), crude protein (CP) and neutral detergent fiber (NDF) intake with estimated average values of 935.56, 162.79 and 169.73 g.day-1 and 4.03, 0.7 and 0.73% BW, respectively. But for MM and EE, increasing linear effect (P <0.05) was observed due to the higher content of these nutrients in the sunflower residue composition. There was no difference (P> 0.05) for DM, NDF and CP digestibility coefficients, with mean values of 73.09, 45.19 and 66.71%, respectively. The inclusion of sunflower residue in substitution of corn silage from lambs diet did not change (P> 0.05) the nitrogen compounds balance. Thus, sunflower residue can replace corn silage in up to 26.73% of DM diets of lambs.