Effects of Navel Orange Residue and Stevia Residue Microbial Silage Feed on Growth Performance,Plasma Biochemical Indices and Fecal Microbial Diversity of Beef Cattle
This study was conducted to explore the effects of navel orange residue and stevia residue microbial silage feed on growth performance,plasma biochemical indices and fecal microbial diversity of beef cattle.A total of 24 Simmental crossbred beef cattle at 22 months of age in good health and similar weight were random-ly divided into 4 groups with 6 cattle per group.The control group was fed the experimental diet contained 30％microbial silage rice straw,the experiment group Ⅰ was fed the experimental diet contained 6.0％microbial si-lage rice straw and 24％microbial silage stevia residue,the experiment group Ⅱ was fed the experimental diet contained 6.0％microbial silage rice straw and 24％microbial silage navel orange residue,and the experiment group Ⅲ was fed the experimental diet contained 6.0％microbial silage rice straw,12％microbial silage stevia residue and 12％microbial silage navel orange residue.The pre-trial period was 1 week and the trial period was 11 weeks.The results showed as follows:1)the average daily gain of experiment group Ⅲ was significantly higher than that of control group and experiment group Ⅱ(P＜0.05),and the feed to gain ratio was signifi-cantly lower than that of control group and experiment group Ⅱ(P＜0.05).2)The contents of glutamate(Glu),phosphofructokinase(PFK)and glucose-6-phosphate dehydrogenase(G6PDH)in plasma of experi-ment group Ⅲ were significantly higher than those of control group and experiment group Ⅱ(P＜0.05),and the contents of urea nitrogen(UN)and pyruvate kinase(PK)in plasma were significantly low than those of control group and experiment group Ⅰ(P＜0.05).3)At the phylum level,the relative abundance of Proteobac-teria in feces of experiment group Ⅲ was significantly higher than that of other three groups(P＜0.05),and the relative abundance of Firmicutes in feces was significantly lower than that of other three groups(P＜0.05).At the genus level,the relative abundance of Acinetobacter in feces of experiment group Ⅲ were significantly higher than that of other three groups(P＜0.05),the relative abundances of UCG-005 and Alistipes in feces were significantly lower than those of other three groups(P＜0.05).and the relative abundance of Rikenellace-ae_RC9_gut_group and UCG-010 in feces were significantly lower than those of control group and experi-ment group Ⅰ(P＜0.05).4)The Faith_pd index of experiment group Ⅲ was significantly higher than that of other three groups(P＜0.05),and the Shannon index and Simpson index were significantly lower than those of the control group(P＜0.05).Furthermore,there was a significant difference in Beta diversity between experi-ment group Ⅲ and control group,and there were significant differences between the control group and other experiment groups in amino acid metabolism,energy metabolism and other functions(P＜0.05).In summary,the addition of navel orange residue and stevia residue mixed microbial silage feed can improve the growth per-formance of beef cattle,improve the plasma biochemical indices,change the Alpha diversity and Beta diversity of fecal microbial community of beef cattle,and regulate digestive and absorptive functions of intestinal micro-organisms in beef cattle.[Chinese Journal of Animal Nutrition,2024,36(5):3070-3081]
万方数据
维普
