代乳粉对早期断奶犊牛生长的影响

旨在评价饲喂代乳粉对早期断奶犊牛生长及培育成本的影响。选取体重相近的新生犊牛45头,随机分为试验1组、试验2组和对照组;试验1组饲喂A品牌代乳粉,试验2组饲喂B品牌代乳粉,对照组饲喂牛场产鲜牛奶;测定各组实验犊牛的出生体重、1月龄体重和50日龄断奶体重;计算并比较各组犊牛培育成本。结果表明,各组犊牛的出生体重和1日龄体重差异不显著（P〉0.05）;试验1组和试验2组犊牛的50日龄断奶体重分别比对照组增加5.12、2.86 kg,且试验1组与对照组相比差异显著（P〈0.05）;试验1组和试验2组犊牛的平均日增重分别比对照组增加0.14、0.07 kg,且试验1组和对照组相比差异显著（P〈0.05）;试验1组与试验2组平均每头犊牛分别比对照组节约饲养成本198.8、222.0元。综上提示,使用代乳粉能够促进犊牛生长,降低犊牛的培育成本,提高养殖场的经济效益。

Effect of Milk Replacer on Growth of Early Weaned Calves

This study was aimed to evaluate the effect of milk replacer on growth and rearing cost of early weaned calves. A total of45 newly born calves with similar weight were randomly assigned to one of three groups such that experimental group 1 fed A brand milk replacer, experimental group 2 fed B brand milk replacer, and control group fed fresh milk produced in the dairy farm.The birth weight, one-month-old weight and fifty-day-old weight（weaning weight） of the calves were determined and the rearing cost for each group were calculated and statistically compared. The results showed that there were no significant differences in birth weight and one-month-old weight of the calves among different groups（P 〉0.05）; The fifty-day-old weight（weaning weight） of experimental group 1 and experimental group 2 was 5.12 kg and 2.86 kg increased compared with that of control group respectively, and significant differences were observed between experimental group 1 and control group（P〈0.05）; The average dairy weight gain of experimental group 1 and experimental group 2 was 0.14 kg and 0.07 kg increased compared with that of control group respectively, significant differences were also found between experimental group 1 and control group（P〈0.05）; The average cost for individual calf rearing of experimental group 1 and experimental group 2 was 198.8 Yuan and 222.0 Yuan less than that of control group. It was indicated that feeding milk replacer was able to promote the growth and save the rearing cost of calves as well as improve the economic benefit for dairy farm.