日粮蛋白质水平对断奶湖羊生长性能、血清生化指标的影响OA

[Objective]To clarify the effects of protein levels in the diet on the growth performance and serum biochemical indicators of weaned Hu lambs.[Method]80 weaned Hu lambs were selected and randomly divided into 4 groups,with 20 lambs in each group.The protein levels of the concentrate feed for the control group,test group 1,test group 2 and test group 3 were 14.70%,15.12%,16.02%and 16.89%respectively.The control group was fed with the self-mixed concentrate feed in the farm.The lambs in each group were fattened for 90 days.The daily weight gain,serum biochemical indicators,immune indicators and antioxidant indicators of the Hu lambs in different test groups were measured and analyzed.[Results]There were no significant differences in the initial weight,final weight,average daily gain,and average feed conversion ratio of the lambs in each group.The contents of TP,SOD,and GSH-PX in the serum of the lambs in the three experimental groups significantly increased,while the contents of AST and MDA significantly decreased.The contents of IgA,IgG and IgM in the serum of the lambs in Group 1,Group 2 and Group 3 showed an increasing trend.[Conclusion]Moderately increasing the dietary protein level can enhance the average daily weight gain of weaned Hu lambs,reduce the feed conversion ratio,promote protein metabolism in the body,and improve the body's antioxidant capacity and immunity.It is recommended that the dietary protein level be 16.89%.