关中黑猪和八眉猪泌乳性能的研究

The Milkability in Guanzhong Black and Bami Sows

在相同条件下,对关中黑猪和八眉猪经产母猪的泌乳性能作了研究。结果表明:关中黑猪经产母猪60d泌乳量315.178kg,日泌乳量5.25kg,显著高于八眉猪的239.227和3.94kg;两品种猪平均日放乳次数为25.75和23.58次,放乳持续时间12.16和11.42s,放乳后的拱奶时间2.13和2.31min,放乳间隔53.67和58.36min,泌乳行为与导乳量密切相关;仔猪生后20d每公斤增重需要母乳,两品种分别为5.56和5.31kg,生后30d为5.54和5.32kg。

The milk performance in Guanzhong Black and Bami sows were studied under the same conditions. The sesults showed that the milk yield in 60 days and the average daily milk yield cf Guanzhong Black sows were 315. 178 kg.and 5.25 kg. respectively, being significantly higher than 236.227 kg and 3.94 kg. yielded by Bami sows. The average daily milking number of times in Guanzhoge Black and Bami sows were 25.75 and 23.58. The milk sustained time was 12.16 and 11.42 sec.j the time of massaged udder by the piglets after the let-down was 2.13 and 2.31min5the milking interval time was 53.67 and 58.36 min. separately. There was a close relation between milking behavior and milk yield. The piglets had one kg.of body weight gain at the milk consumption of 5.56 kg. and 5.31 kg.at the age of 20 days and of 5.54 kg. and 5.32 kg. at the age of 30 days.