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닭의 주령 및 정액주입 간격이 수정률과 부화율에 미치는 영향
주영국(Y . K . Joo),박충생(C . S . Park),강대진(D . J . Kang),김윤환(Y . H . Kim) 한국축산학회 1991 한국축산학회지 Vol.33 No.12
This experiment was carried out to find out the effects of age of hens and insemination intervals on the fertility and hatchability of hens. A total of 1,230 older hens of PS Arbor Acres aged 64 weeks at initial stage and 225 younger hens of PS Arbor Acres aged 32 weeks at intial stage were used for the experiment. The results obtained were summarized as follows: The fertilities over the experimental period of older hens inseminated in the intervals of 3.5 and 7 day were 86.6±0.2, 83.7±0.7 and 74.9±0.8, respectively and those of younger hens were 92.8±0.4, 87.1±0.5 and 80.7±0.6, respectively. Hatchabilities of eggs from the younger hens were also significantly(P$lt;0.001) higher in all the groups of insemination intervals, compared with those from the older hens. The fertility of the hens of both age groups was not affected by the summer season. The fertility of younger hens increased significantly(P$lt;0.01) in August, compared to the fertility in May. In the group of hens inseminated repeatedly in the interval of 7 days, the fertility of hens was found to be highest in 2 to 3 days after insemination and it decreased significantly as the time passed. There was no significant decrease in fertility of hens in both age groups when the hens were inseminated once a week consecutively for experimental period of 91 days.