Effects of Ginkgo biloba powder on growth performance,serum indexes and rumen microbiome of Angus cattle
The aim of this study was to investigate the effects of Ginkgo biloba powder on growth performance,serum indexes,rumen microbiome and rumen metabolomics of Angus cattle.A total of 25 healthy Angus cattle with an average body weight of 453.8 kg aged 12～16 months were randomly divided into 5 groups.The cattle were fed the basal diet(Con,n=5)and diets containing 3％(G3,n=5),6％(G6,n=5),9％(G9,n=5)and 12％(G12,n=5)Ginkgo biloba powder,respectively.The pre-test lasted for 10 d and the trial lasted for 75 d.The results showed as follows:dietary Ginkgo biloba powder increased the average daily gain of Angus cattle,and significantly increased the dry matter intake of Angus cattle.Compared with Con group,serum triglyceride content in G9 group was significantly decreased,total antioxidant capacity was significantly increased,malonaldehyde concentrations in G6 and G9 groups were significantly decreased.Compared with Con group,the proportions of propionic acid in G6 and G9 groups were significantly increased,while the proportions of acetic acid were significantly decreased.There was no significant difference in the diversity and richness of rumen microbial communities among all groups.At the phylum level,compared with Con group,the relative abundances of Firmicutes in rumen of Angus cattle in G6 and G9 groups were significantly increased,while the relative abundances of Spirochaetota were significantly decreased.At the genus level,the relative abundances of F082_unclassified and Paludibacter_unclassified in G6 group were significantly decreased compared with Con group.The relative abundance of F082_unclassified in G9 group was significantly decreased,and that of Succiniclasticum was significantly increased.The results of rumen metabolomics showed that in positive ion mode,compared with Con group,the contents of fatty acids in the rumen of G6 and G9 groups were significantly decreased,and the contents of other metabolites were significantly increased.In negative ion mode,the contents of diazine and organic oxygen compounds in rumen of G6 and G9 groups were significantly decreased compared with Con group,while the contents of other metabolites were significantly increased.In conclusion,dietary supplementation of 6％～9％Ginkgo biloba powder has positive effects on the growth performance and blood indexes of Angus cattle,improves rumen fermentation parameters,and has certain effects on the composition of rumen metabolites.It is suggested that the optimal supplemental amount of Ginkgo biloba powder should be 6％～9％of the basal diet.
万方数据
维普
