The effects of adding refined feed supplements in winter on pancreatic development,blood biochemical indicators,and rumen bacterial diversity in yaks
The aim of this experiment is to investigate the effects of adding refined feed supplements in winter on pancreatic development,blood biochemical indicators,and rumen bacterial diversity in yaks.48 male yak calves(120 days old)with good physical condition were randomly selected for the experiment and divided into 4 groups(experimental group Ⅰ,experimental group Ⅱ,experimental group Ⅲ,and control group),each group had 12 calves.The control group was grazed and raised,while the experimental groups Ⅰ,Ⅱ,and Ⅲ were supplemented with 0.125,0.25,and 0.5 kg of concentrate supplements daily on the basis of grazing.The pre trial period is 20 days,and the formal trial period is 100 days.The results showed that:(1)Compared with the control group,the experimental group had significantly higher pancreatic weight and the proportion of pancreatic internal and external secretion area(P＜0.05),while the proportion of pancreatic internal and external secretion area was significantly lower(P＜0.05).And experimental group Ⅲ was the most obvious.(2)Compared with the control group,the blood glucose and albumin content in the serum of yaks fed with supplementation Ⅱ and Ⅲ increased significantly(P＜0.05),while other indicators showed no significant changes.(3)Adding refined feed supplements can significantly increase the abundance of Bacteroidetes and Actinobacteria in the rumen of yaks(P＜0.05),and significantly increase the abundance of Verrucomycota and Spirochetes(P＜0.01),but significantly reduce the abundance of Myxococcus and Fibrobacteria(P＜0.01).From this,it can be seen that adding refined feed supplements in winter can improve the growth performance of yaks,promote pancreatic development level,increase the relative abundance of dominant microbial communities,reduce the abundance of harmful microbial communities,and provide scientific and reasonable basis for yak breeding.
yakfine material replenishment materialspancreatic developmentbiochemical indicatorsrumenbacterial diversity
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