›› 2009, Vol. 36 ›› Issue (5): 5-8.

• 动物营养与饲料科学 •     Next Articles

Influence of Adding Virginiamycin to Diets of Steers on Ruminal Fermentation Parameter and Microbial Populations

GUO Tong-jun1，2，WANG Jia-qi1，BU Deng-pan1，LIU Kai-lang1，LI dan1，LUAN Shao-yu1，DENG Lu-fang1，HUO Xiao-kai1，2，GUO Wei-jie1，2，
   

  1. (1.State Key Laboratory of Animal Nutrition, Institute of Animal Science， Chinese Academy of Agricultural Science,Beijing 100193,China; 2. Xinjiang Agricultural University， Urumqi 830052,China)
  • Received:1900-01-01 Revised:1900-01-01 Online:2009-05-20 Published:2009-05-20
  • Contact: WANG Jia-qi

Abstract: The purpose is to investigate the influence of virginiamycin on rumen fermentation parameter and ruminal microbial populations of steers. Four ruminally cannulated steers(559.4 kg±30.1 kg) were used in a repeated cross-over design. The addition dose of virginiamycin was 30 mg/kg concentrates (DM). It was indicated that virginiamycin could suppress Amylolytic bacteria populations and Proteolytic bacteria populations (P<0.01).Virginiamycin increased ruminal pH (P<0.05) and the utilization rate of ruminal NH3-N (P<0.01). Viginiamycin inhibit the concentration of L-lactic acid (P=0.304). TVFA showed no difference (P=0.864). We presume that the virginiamycin inhibit Amylolytic bacteria populations and Proteolytic bacteria populations, which lead to the decrease of lactic acid concentration and consequently the pH value.

Key words: virginiamycin; cattle; roll-tube technique; ruminal fermentation parameter

CLC Number: