Response of yak gut microorganisms to pastures in different phenological periods on the Qinghai-Tibetan Plateau
This study investigated the responses of gut microorganisms and serum biochemicals to different pastures during various phenological periods.A total of fifteen male yaks with an average age and weight of 3 years and 122.60 kg were selected.Based on the plant phenology periods for the Qing-Tibetan Plateau,all yaks were randomly assigned to three groups:the regreen period group(n=5),the grassy period group(n=5),and the withered grass period(n=5).Fecal and serum samples were collected and analyzed and the results showed that the Pielou_e,Simpson,and Shannon indices were higher(P＜0.05)in the regreen and grassy periods.At the phylum level Firmicutes,Bacteroidetes,and Proteobacteria were predominant.At the family level,Rikenellaceae abundance(P=0.052)tended to increase in the regreen and grassy period groups compared to that in the withered grass period,but the Peptostreptococcaceae(P=0.008)and Micrococcaceae(P=0.055)abundances tended to increase in the withered grass period group at the genus level,Rikenellaceae_RC9_gut_group(P=0.045)abundance increased in yaks during the regreen period,whereas Romboutsia abundance significantly increased in the withered grass period(P=0.008).The ALB,UA,CHO,HDL,and LDL concentrations were significantly higher(P＜0.01)in the grassy period group,the BUN levels were significantly(P＜0.001)higher in the regreen period group,and the CREA concentration was significantly(P＜0.001)higher in the withered grass period group.In conclusion,the gut flora composition and serum biochemistry in grazing yaks showed seasonal changes that were influenced by the nutritional quality of the pastures during different phenological periods.
万方数据
维普
