玉米秸秆青贮饲料与全株玉米青贮饲料饲喂奶牛的差异研究

玉米秸秆和全株玉米均是制作奶牛青贮饲料的重要原料。为比较玉米秸秆青贮饲料与全株玉米青贮饲料对奶牛生产性能的影响,本研究将胎次、年龄、体重及产奶量相同的20 头奶牛分为两组——试验组1和试验组2,分别饲喂玉米秸秆青贮饲料与全株玉米青贮饲料,通过统计各组奶牛产奶量、乳脂率及乳蛋白率,分析玉米秸秆青贮饲料与全株玉米青贮饲料对奶牛生产性能的影响。试验结果表明,试验组2的日平均产奶量高于试验组1,且差异极显著（P<0.01）;试验组1和试验组2乳脂率差异不显著（P>0.05）;试验组2的平均乳蛋白率高于试验组1,且差异显著（P<0.05）,且全株玉米青贮比玉米秸秆青贮经济效益更高,一个泌乳周期可增加736.8 元/头。

Study on the Difference between Corn Straw Silage and Whole Plant Corn Silage Fed to Dairy Cows

Corn straw and whole corn are important raw materials for making silage for dairy cows.. In order to compare the effects of corn straw silage and whole plant corn silage on milk production performance of dairy cows,twenty dairy cows with the same parity,age,weight,milk production were divided into two groups,respectively fed corn straw silage and whole plant corn silage. Effects of silage on milk production performance of dairy cows were analyzed by milk yield,milk fat percentage and milk protein percentage. The results showed that the average daily milk yield of experimental group 2 was significantly higher than that of experimental group 1（P<0.01）.There was no significant difference in milk fat percentage between experimental groups 1 and 2（P>0.05）.The average milk protein percentage of test group 2 was significantly higher than that of test group 1（P<0.05）,and the economic benefit of whole corn silage was higher than that of corn straw silage,with an increase of 736.8 yuan per head per lactation cycle.