摘要
A处理:75头成年母牦牛,冷季补喂优质青干草3.1千克/头日;B处理:75头成年母牦牛,在集中产犊前进行优质放牧;c处理:148头作为对照。结果表明A处理少减重2.03千克(P<0.05),具有抑制母牦牛冷季体重下降的作用,并且犊牛初生重大1.79千克(P<0.05)和日增重高21克(P<0.01);184天挤奶量高10.72千克(P<0.01),乳脂率高0.6个百分点(P<0.05),繁活率高8个百分点(P<0.05)。B处理仅在犊牛成活与生长发育方面表现出明显效果,提高成活率5个百分点(P<0.05),提高初生重1.53千克(P<0.05)以及提高日增重19克(P<0.05)。重复试验结果与第一次试验基本一致。
The expeviments wece canied out over two winters of 1989/1990 and 1990/1991, using 998 yak cows allocated at random to three treatments. The treatment A was 75 female yaks for supplementation of hay of 3.1 kg daily per cow. The treatment B was 75 female yaks for intensive graying prior to calving. The treatment C was 148 female yaks for control group. The results of the trial have shown that a 2.03 kg of weight-loss during the winter was decreased by treatment A (P<0.05), and a 1.79 kg of birthweight, a 21g of dairy weight gain were increased by the treatment A (P<0.05), and 0.6 percentage points of milkfat, a 10.7 kg of milk yield over the period of 184 days were increased by the A (P<0.01) and 8 percentage points of repsoductive and sarvival rate were increased by the A (P<0.05). The effects of the treatment B were observed only in calf survival and growth. a 5 percentage pionts of survival rate and a 1.53 kg of birthweight and a 19g of daily weight gain over the period from birth to three months of age were increased by the treatment B (P<0.05). The results of the replicated trial was as same as that of the first trial.
关键词
冷季
补饲
母牦牛
牦牛
系统分析
Supplement Feeding in Winter, Performance of Female Yak, Least Square Method
