Greene W A, Galton D M, Erb H N
Department of Animal Science, Cornell University, Ithaca, NY 14853.
J Dairy Sci. 1988 May;71(5):1406-16. doi: 10.3168/jds.S0022-0302(88)79699-X.
A field study using seven Holstein herds was conducted to determine effects of prepartum milking on milk production, health disorders, and reproductive performance. In each herd, 80 cows (30% first lactation cows) were assigned 1 mo prior to expected calving date to one of two treatments: postpartum or prepartum milking. The group milked prepartum was machine-milked twice daily at regular milking intervals beginning 14 d prior to date of expected calving. The group milked postpartum was milked for the first time after calving. The day prior to calving, 36, 33, and 31% of the cows milked prepartum produced less than 4.5 kg, 4.5 to 9 kg, and greater than 9 kg of milk, respectively. No relationship existed between days milked prepartum and prepartum milk yield. Lactation milk yield and persistency were not affected by prepartum milking. Prepartum milking reduced incidence of milk fever and mastitis during the 1st mo after parturition. Treatment was not a significant source of variation for reproductive performance or body condition; however, culling was higher for cows milked postpartum. Results indicate no adverse effects on cow performance due to prepartum milking nor increase in lactation milk yield.
进行了一项使用七个荷斯坦牛群的实地研究，以确定产前挤奶对产奶量、健康问题和繁殖性能的影响。在每个牛群中，在预期产犊日期前1个月，将80头奶牛（30%为头胎泌乳奶牛）分配到两种处理方式之一：产后挤奶或产前挤奶。产前挤奶组从预期产犊日期前14天开始，每天按常规挤奶间隔进行两次机械挤奶。产后挤奶组在产犊后首次挤奶。在产犊前一天，产前挤奶的奶牛中，分别有36%、33%和31%的产奶量低于4.5千克、4.5至9千克和高于9千克。产前挤奶天数与产前产奶量之间没有关系。泌乳期产奶量和持续性不受产前挤奶的影响。产前挤奶降低了产后第1个月内乳热和乳腺炎的发病率。处理方式对繁殖性能或体况不是一个显著的变异来源；然而，产后挤奶的奶牛淘汰率更高。结果表明，产前挤奶对奶牛性能没有不利影响，也不会增加泌乳期产奶量。
