[Zhang, X. L.; Tang, Z. R.; Sun, W. Z.; Deng, H.; Zhang, Z.] Southwest Univ, Key Lab Biofeed & Anim Nutr, Chongqing 400715, Peoples R China.
[Tang, Z. R.] Chongqing Engn Res Ctr Herbivores Resource Protec, Chongqing 400715, Peoples R China.
[Zen, Y.] Hunan Inst Microbiol, Changsha 410009, Hunan, Peoples R China.
[Xiao, D. F.] Hunan Agr Univ, Acad Anim Sci & Technol, Changsha 410128, Hunan, Peoples R China.
[Tang, Z. R.] Southwest Univ, Coll Anim Sci & Technol, Tiansheng Rd 2, Chongqing 400715, Peoples R China.