西杂牛产奶性能试验研究

用西门塔尔级进杂交改良本地黄牛,产生西杂一代、二代、三代牛。分别对其1、2、3胎产奶量进行测定,结果表明：各代胎次之间奶量差异不显著（P〉0.05）,但从1胎到3胎上升势头明显,3胎最高;各代305 d平均产奶量差异极显著（P〈0.01）,西杂一代最低、三代最高,产奶天数随着杂交代次提高而逐渐增加;西杂牛产奶收益显著。开展西杂牛挤奶是增加奶源、提高养殖效益的重要举措。

Study on Milk Production Performance of Simontal Crossbred Dairy Cattle

Upgrading crossbreeding of Simmental cattle on Native Yellow Cattle,Simmental crossbred F1,F 2and F3 were produced.Milk yield of first birth,second birth and third birth were measured respectively.The results showed that milk yield among generation parity was no significant difference（P0.05）,however,an upward trend was showed from parity 1 to 3,parity 3 was the highest.Generations 305 d average milk yield was significantly different（P0.01）,parity 1 was the lowest and parity 3 was the highest,milk production days were increased with crossbred generation,milk yield was significant for simmental cattle.Therefore,milk from simmental cattle is an important measure to improve breeding efficiency.