苜蓿干草在泌乳奶牛上的应用浅析

Effects of Appended Alfalfa Hay on Performance of Lactating Dairy Cows

本试验旨在通过利用苜蓿干草替代部分精料来研究对奶牛生产性能以及经济效益的影响。选择年龄、体重、泌乳天数、产奶量、健康状况相近的20头奶牛,随机分为2组(对照组、试验组),每组10头,进行为期60d的试验。试验组利用2kg苜蓿干草替代等量的奶牛精补料。结果显示,与对照组比较,试验组产奶量提高了2.06kg/(头·d),乳脂率、乳蛋白率分别提高了0.1、0.01个百分点,但差异均不显著(P>0.05)。通过经济效益比较发现,试验组收益比对照组增加了7.64元/(头·d)。试验结果表明,利用苜蓿干草替代部分奶牛精补料有提高奶牛生产性能的趋势,可增加经济效益。

The experiment studied the effects on production performance of lactating dairy and economic benefits by replacing part of concentrate using alfalfa hay. Twenty Holstein lactation cows were selected with similar age, avoirdupois, lactation period, milk quantity and randomly grouped two teams,control group and test group.The trial was conducted for 60 days.Two kilograms alfalfa hay was substituted for partial concentrated feed of the dairy cow ration.The results indicated that compared with the control group, the test group milk production increased 2.06 kg, milk fat and milk protein were respectively increased by 0.1and 0.01 percentage points, the difference was not significant（P0.05）. According to economic benefits, the profit of test group was increased 7.64 yuan everyday and every cow than control group. The test results showed that, the cow concentrate was replaced by alfalfa hay can improve the production performance of dairy cows and increase economic benefits. Using alfalfa grass block substitute some extract feed supplement is feasible.