摘要
整理了南京地区C奶牛场36个月间817头次荷斯坦奶牛的产奶数据,探讨季节对奶牛泌乳量的影响。南京地区暑热期从五月开始长达5个月,五月份减产约14%,七月份比六份下降21%,暑热期产奶量的下降率为0.46kg/kg,高产奶牛的降幅增加。
Collected the date of milk yield of 817 Hostein dairy cows from Jan 2000 to Dec 2002 in Nanjing, and investigated the effect of long-term and short-term heat stress. During high temperature season, the milk yield decreased about 14%~21%, the difference decreased by 0.42 kg for every 1kg milk yield.
出处
《家畜生态》
2004年第3期37-39,共3页
Ecology of Domestic Animal
基金
国家科技攻关计划课题:南方农区奶业现代化生产技术集成与产业化示范(2002BA518A12)资助
