排序方式: 共有1条查询结果,搜索用时 0 毫秒
1
1.
The pregnancy rates at 20 and 50 days were tested by sampling 91 hybridization sows more than 16 days using the intuitive, fast, accurate and non-invasive portable veterinary B ultrasound instrument in the pig breeding farm had 300 sows. The results showed that the nonpregnant diagnostic accuracy rate was 100% at 18 to 20 days, and the pregnant diagnostic accuracy rate was 100% at 40 to 50 days. According the diagnostic results, the pregnancy, disease, estrus, nonpregnancy and non-estrused sows were took the appropriate measures such as nursing, treatment, supplementary breeding and sensuality, the non-productive days of the individuals and groups of sows were improved by above measures. The study built a intuitive, fast, accurate sows early pregnancy diagnosis technology, which improved the fertility of the individuals and groups of sows increased the economic benefit of pig farm. 相似文献
1