动物营养学报2019，Vol.31Issue(9)：4080-4091,12.DOI:10.3969／j.issn.1006⁃267x.2019.09.020
不同剩余采食量的湖羊生长性能和消化道微生物多样性差异的研究
Difference of Growth Performance and Digestive Tract Microbial Diversity of Hu Sheep with Different Residual Feed Intake
摘要
Abstract
This study was designed to explore the differences of growth performance, rumen and cecum micro?bial diversity of the Hu sheep with different residual feed intake ( RFI). Sixty healthy Hu lambs with body weight of ( 25.2±2.5) kg were fed the same pellets feed individually, and the pre?trial period was 14 days, while the trial period was 63 days. The RFI of 60 sheep were calculated using dry matter intake ( DMI) , aver?age daily gain and metabolic midweight multiple regression model, and 12 sheep with the highest RFI ( n＝6) and lowest RFI ( n＝6) were chosen to be slaughtered and sampled. Results showed as follows: 1) DMI in high RFI group was significantly higher than that in low RFI group ( P＜0.05) , but there were no significant differences in initial body weight, final body weight, average daily gain, feed conversion ratio, GR value and tail fat weight between high and low RFI groups ( P＞0.05). There was a significant positive correlation be?tween RFI and DMI as well as feed conversion ratio, GR value ( P＜0.05) , and a positive correlation trend be?tween RFI and tail fat weight ( 0.05≤P＜0.10) , and no significant correlation between RFI and both initial body weight, final body weight and average daily gain ( P＞0.05). 2) No effects of RFI on ruminal bacteria richness and diversity indexes were detected ( P＞0.05) , as well as the richness indexes in cecum bacteria ( P＞0.05). The Shannon index of cecal bacteria in low RFI group was significantly higher than that in high RFI group ( P＜0.05) , while the Simpson index was tended be higher in this group (0.05≤P＜0.10). The relative abundance of Rikenellaceae RC9 gut group of rumen in high RFI group was significantly lower than that in low RFI group ( P＜0.05) and the relative abundance of Bacteroides and Ruminococcaceae UCG?013 group of cecum in low RFI group were significantly higher than those in high RFI group ( P＜0.05). The above?men?tioned results indicate that individuals with high RFI are more likely to deposit body fat, and the effects of dif?ferent RFI on rumen and cecum microflora of Hu sheep are only reflected in several special genus which may plays an important role in digestion.[ Chinese Journal of Animal Nutrition, 2019, 31(9) :4080?4091]关键词
剩余采食量/湖羊/生长性能/微生物Key words
residual feed intake/Hu sheep/growth performance/bacteria分类
农业科技引用本文复制引用
马万浩,梁玉生,张智安,董春晓,李飞,李发弟,翁秀秀..不同剩余采食量的湖羊生长性能和消化道微生物多样性差异的研究[J].动物营养学报,2019,31(9):4080-4091,12.基金项目
国家重点研发计划( 2018YFD0502103) （ 2018YFD0502103）
公益性行业(农业)科研专项——北方农作物秸秆饲用化利用技术研究与示范(201503134) （农业）
甘肃现代农业(草食畜)产业技术体系( GARS⁃09) （草食畜）
