Effects of fermented cottonseed meal on growth performance,immune function and carcass traits of broilers
To investigate the effects of fermented cottonseed meal on the growth performance,immune function,and carcass traits of broiler chickens.480 22 day old fast type yellow feathered broiler chickens with similar body weight were selected for the experiment and randomly divided into 4 groups,with 4 replicates in each group,and 30 chickens per replicate.The control group was fed a corn soybean meal based basal diet,while the other three groups were replaced with soybean meal with 10%,20%,and 30%fermented cottonseed meal,respectively.The experimental period is 42 days.The results showed that,Compared with the control group,the 20%fermented cottonseed meal group showed an increase of 8.79%(P＜0.05)and 11.39%(P＜0.05)in mince weight and average daily weight gain of broiler chickens,while the feed to weight ratio decreased by 9.54%(P＜0.05);The 10%fermented cottonseed meal group showed an increase in broiler meal weight and average daily gain,while the feed to weight ratio decreased,but the difference was not significant(P＞0.05).(2)Compared with the control group,the 10%fermented cottonseed meal group and the 20%fermented cottonseed meal group significantly increased the bursal index,spleen index,and thymus index of broiler chickens(P＜0.05);The thymus index of broiler chickens in the 30%fermented cottonseed meal group was significantly increased(P＜0.05).(3)Compared with the control group,the 10%fermented cottonseed meal group showed a significant increase in the total net bore rate and chest muscle rate of broiler chickens(P＜0.05);The 20%fermented cottonseed meal group significantly increased the total net bore weight,total net bore rate,chest muscle rate,and leg muscle rate of broiler chickens(P＜0.05).Conclusion:Low levels of fermented cottonseed meal in the basic diet can improve the growth performance,immune function,and carcass traits of broiler chickens.Without considering cost factors,the suitable substitution level of fermented cottonseed meal for soybean meal is 20%.
万方数据
维普
