title: ruminal microbiota
design: Six male goats (Boer × Yangtze River Delta White, aged 4 mo) were fed with a diet of 90% dried hay plus 10% concentrate in the first four weeks. After that, one group of three goats was slaughtered to collect the ruminal fluid and epithelium. The remaining three goats were fed with a diet of 65% dried hay plus 35% concentrate for the following four weeks. Ruminal fluid and epithelium were collected on 56 d.