Effect of replacing soybean meal with cottonseed meal in basic diet on growth performance,antioxidant indicators,and meat quality of meat sheep
The study aims to investigate the effects of cottonseed meal(CSM)replacing soybean meal in basic diets on the growth performance,antioxidant indicators,and meat quality of meat sheep.96 Du Han crossbred meat sheep with no significant difference in initial weight were selected and randomly divided into 4 groups,with 3 replicates in each group and 8 in each replicate.The control group(CON group)was allocated a basic diet according to NRC(2007)recommendations,while the other three groups were replaced with 33.33%(L group),66.67%(M group),and 100.00%(H group)of cottonseed meal in the basic diet.The experimental period was 60 days.The result showed that,(1)Compared with the CON group,the final weight of the H group meat sheep significantly decreased by 2.03%(P＜0.05),the average daily gain significantly decreased by 4.92%(P＜0.05),and the feed to weight ratio significantly increased by 5.13%(P＜0.05).There was no significant difference(P＞0.05)in the final weight,average daily gain,and feed to weight ratio of meat sheep among the CON group,L group,and M group.(2)Compared with the CON group,the total antioxidant capacity of serum in the H group significantly decreased by 24.42%(P＜0.05),superoxide dismutase significantly decreased by 15.70%(P＜0.05),and malondialdehyde significantly increased by 28.61%(P＜0.05).There was no significant difference in serum total antioxidant capacity,superoxide dismutase,and malondialdehyde among CON,L,and M groups of meat sheep(P＞0.05).(3)Compared with the CON group,the drip loss of M and H groups significantly increased by 46.86%and 47.19%(P＜0.05),and the cooking loss of M and H groups significantly increased by 5.89%and 6.19%(P＜0.05).The drip loss and cooking loss in the L group were higher than those in the CON group,but there was no significant difference(P＞0.05).Conclusion:Replacing soybean meal in the basic diet with medium to low levels(33.33%,66.67%)of cottonseed meal has no negative impact on the growth performance and antioxidant indicators of meat sheep;Replacing soybean meal in the basic diet with medium to high levels(66.67%,100.00%)of cottonseed meal will reduce the meat quality of mutton sheep.
万方数据
维普
