To analyze the effects of compound microecological agents on the growth performance and incidence rate of diarrhea of Simmental weaned calves.Method:80 Simon Thar weaned calves weighing around 200 kg at the age of 5 months were selected and evenly divided into four groups:low dose group,medium dose group,high dose group,and control group.The compound microecological agents(dosage:4,8,16 g/d)were added to the concentrate feed for 90 d,and the calf weight gain,feed intake,feed conversion rate,incidence rate of diarrhea,and fecal pH value,nitrogen,phosphorus,copper,lactic acid bacteria,coliform bacteria and other indicators were analyzed.Conclusion:When adding 8 g/d composite probiotics to calf concentrate,it can significantly increase weight gain,feed intake,feed conversion rate,and the number of bacteria and lactic acid bacteria in feces(P＜0.01);The contents of nitrogen and phosphorus,the number of escherichia coli and the incidence rate of diarrhea were decreased(P＜0.05).
国家科技期刊平台
NSTL
维普
万方数据
