Resumen de Efecto de la inclusión de oleína de girasol en la dieta de en corderos en fase de crecimiento-cebo sobre la ingestión, la digestibilidad y el rendimiento productivo
Raúl Bodas Rodríguez, L. Morán, N. Prieto, Sonia Andrés Llorente, Salvador López Galarza, N. Nota, F. Javier Giráldez García, Carolina Blanco Fontao
Fifty five Merino lambs (15.6 kg initial body weight, BW) were distributed in 5 experimental groups to study the effect of level of sunflower soapstock (SS) inclusion in the TMR (0% -Control-, 1.5, 3.0, 4.5 and 6.0%) on digestibility and animal performance. The animals were fed ad libitum, BW being recorded twice a week. Feces and urine were collected for 5 days from 4 animals per group to estimate digestibility. Lambs were slaughtered at 27 kg BW, hot and carcass weights being recorded. No significant differences were observed in feed intake. Dry matter and neutral detergent fibre digestibility decreased as level of soapstock increased (P<0.05), whereas CP and EE digestibility was not affected (P>0.05). Lambs receiving 3.0% sunflower soapstock tended to have the best average daily gain and feed to gain ratio (P<0.10), followed by Control, 6.0, 1,5 and 4,5% groups. No significant differences were observed in chilling losses or dressing percentage. The inclusion of sunflower soapstock up to 6% in the TMR for fattening lambs has no detrimental effects on intake and animal performance, but considering the effects on dry matter and fibre digestibility, the optimum level of inclusion seems to be around 3%.
