菌酶复合制剂对安格斯母牛繁殖性能及血清生化指标的影响OA

This experiment was conducted to investigate the effects of BECP on reproductive performance and serum biochemical indices of Angus cows.60 postpartum Angus cows in good body condition,with similar body weight(460.54±22.95 kg),were selected in groups of 4 groups×3 repetitions×5 cows.Cows in the CON group were fed a basal diet,and those in the other 3 groups were fed a basal diet+100 g/t(LBECP group),200 g/t(MBECP group),and 300 g/t(HBECP group)BECP,respectively.The experimental period lasted from day 1 postpartum until conception.Results:the ADG of Angus cows in MBECP and HBECP groups was significantly increased by 9.49%and 11.69%,compared with the CON group(P＜0.05).The time to first postpartum estrus and days open of Angus cows in LBECP,MBECP,and HBECP groups were all significantly lower than CON group(P＜0.05),and the estrus rate was highly significantly higher than CON group(P＜0.01).Serum total protein,albumin,and glucose concentrations in LBECP,MBECP,and HBECP groups were significantly higher than CON group(P＜0.05).Serum estradiol concentrations in MBECP and HBECP groups were significantly higher than CON group(P＜0.05).In conclusion,dietary supplementation of BECP can improve reproductive performance and body metabolism of Angus cows.Based on the comprehensive indices,the recommended inclusion level of BECP in the diet of Angus cows is 200 g/t to 300 g/t.