Effects of cotton by-product full mixed fermentation feed on slaughter performance,meat quality,and gross profit of fattening lambs
The purpose of the study was to investigate the effects of feeding different proportions of cotton by-product full mixed fermentation feed on the slaughter performance,meat quality,and gross profit of fattening lambs.In the experiment,36 healthy,2～3 month old Karakul sheep with a weight of(26.0±2.2)kg were randomly divided into three groups,with three replicates per group and four sheep per replicate.The control group was fed with 100％cotton by-product full feed,the 50％group was fed with 50％cotton by-product full mixed fermentation feed+50％cotton by-product full feed,and the 80％group was fed with 80％cotton by-product full mixed fermentation feed+20％cotton by-product full feed.The pre-test period was 15 days and the formal test period was 60 days.The results showed that compared with the control group,the carcass weight,net meat weight,carcass net meat rate,and slaughter rate of the lambs in the 50％and 80％groups were significantly increased(P＜0.05),the eye muscle area was significantly increased(P＜0.05),and the weight of the rumen,small intestine and large intestine of the lambs in the 50％group and 80％group was significantly increased(P＜0.05),but there was no significant difference in rumen index,small intestine index,and large intestine index(P＞0.05).The pH24h value,brightness value(L*),redness value(a*),and intramuscular fat content of the longissimus dorsi muscle of the 50％group and 80％group were significantly higher than those of the control group(P＜0.05),and the drip loss,cooking loss,and shear force were significantly lower than those of the control group(P＜0.05).Compared with the control group,the gross profit of the 50％group and 80％group increased by 1.81％and 25.00％,respectively.The result shows that feeding 50％and 80％cotton by-product full mixed fermentation feed can improve the slaughter performance of fattening lambs,promote the development of rumen,small intestine,and large intestine,improve the meat quality and increase the gross profit.
cotton by-product full mixed fermentation feedfattening lambsslaughter performancemeat qualitygross profit
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