Nineteen multiparous barren Holstein cows were subjected to an induction of lactation protocol for 21 d administering es......

本实验选取新疆呼图壁种牛场１９８４年－１９９５年的黑白花牛，西门塔尔牛，蒙贝利亚牛的１８１０个泌乳期日奶量资料，采用不累加和累加，１０ｄ间隔和３０ｄ间隔４种数据征用ＳＡＳ软件......