TY - China Feed A1 - T1 - Y1 - 2022-07-05 JF - China Feed JO - China Feed SP - 137 EP - 141 VL - 1 IS - 13 UR - http://journal.chinafeed.com.cn N1 - 10.15906/j.cnki.cn11-2975/s.20221323 ER -