China Agr Univ, Natl Feed Engn Technol Res Ctr, Beijing 100094, Peoples R China.
Chinese Acad Sci, Inst Subtrop Agr, Changsha 410125, Peoples R China.
Hunan Agr Univ, Coll Anim Sci & Technol, Zhuzhou 410125, Hunan, Peoples R China.
Hunan Tangrenshen Grp, Ctr Res & Dev, Zhuzhou 412002, Hunan, Peoples R China.
[Li, DF] China Agr Univ, Natl Feed Engn Technol Res Ctr, 2 Yuanmingyuan W Rd, Beijing 100094, Peoples R China.