青贮与黄贮玉米秸秆对泌乳前期荷斯坦奶牛产奶量及乳脂率的影响

Effect of Silage Corn and Yellow-Corn Straw on the Weight and Butter-fat Percentage of Holstein Dairy Cows in Early Lactation

选取45头胎次、年龄、体重一致且产奶量、体况评分相近的泌乳前期荷斯坦奶牛为试验对象,随机分成3个处理组,每组15头。处理1组饲喂青贮玉米秸秆,处理2组饲喂黄贮玉米秸秆,处理3组饲喂青贮加黄贮玉米秸秆,进行为期30d的产奶量和乳脂率对比试验。结果显示:青贮组日均产奶23.84 kg,黄贮组日均产奶20.33 kg,青贮加黄贮组日均产奶22.68 kg。试验结论:饲喂青贮料比饲喂黄贮料的产奶量更高,但用少量黄贮玉米秸秆替代青贮玉米秸秆也可获得与饲喂青贮玉米秸秆相近的产奶量,且对乳脂率影响不大。

45 Holstein dairy cows with similar parity age body weight, milk yield, body condition score were selected as test object and were randomly divided into 3 experimental groups each with 15 heads. The first group was fed with silage corn straw the second group was fed with yellow-corn straw the third group was fed with silage and yellow-corn straw the milk yield and butter-fat were measured after 30 days. The results showed that the first group＇s average daily milk yield was 23.84kg second group＇s average daily milk yield was 20.33kg, third group＇s average daily milk yield was 22.68kg. The conclusion indicated that feeding the silage was superior to feeding yellow fodder but with a little yellow storage cornstalk substi- tuting silage corn straw its milk production was similar and had little effect on butter-fat percentage.