인공수정 횟수가 모돈의 번식성적에 미치는 영향
Effect of Artificial Insemination Frequency on Reproductive Performance in Sows
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초록
본 연구는 인공수정 횟수가 모돈의 번식성적에 미치는 영향을 알아보기 위하여 수행되었다. 총 48두의 F1 모돈(Yorkshire×Landrace)을 공시하였으며, 완전임의화배치법(CRD)에 의하여 4개의 처리구에배치되었다. 처리구는 인공수정 횟수(1회, 2회, 3회, 4회)이며, 발정확인 후 12시간 뒤부터 인공수정을진행하였다. 모돈의 발정확인은 9시와 21시에 웅돈을 접촉시켜서 확인하였으며, 재귀발정일은 5-6일인 모돈들을 대상으로 구배치 하였다. 모돈의 승가허용 확인 후 12시간 간격에 따라 9시와 21시에 처리구에 따른 인공수정을 실시하였다. 인공수정 횟수가 모돈의 임신율, 수태율에는 유의적인 영향을 미치지 않으며, 분만율에서는 3회 인공수정한 처리구가 다른 처리구들에 비해 낮은 수치를 보였다. 총산자수, 생시자돈수, 복당체중과 같은 분만성적에서도 인공수정 횟수에 따른 통계적 차이는 나타나지 않았다. 인공수정 횟수의 1회 감소는 7,000원의 정액비용을 절감할 수 있다. 따라서 발정확인 후 인공수정을 1회하여도 다른 처리구들과 비교해 동일한 번식성적을 가지며, 1회 인공수정을 통한 정액비용의감소는 농가의 생산비를 절감할 수 있을 것으로 사료된다.
Abstract
This experiment was conducted to investigate the effects of artificial insemination(AI) frequencyon reproductive performance of sows. A total of 48 F1 sows(Yorkshire×Landrace) were allocatedto 1 of 4 treatments using completely randomized design(CRD). Four experimental treatments wereAI frequency from one to four times(AI1, AI2, AI3, AI4) respectively. Estrus detection was doneat approximately 09:00 and 21:00 daily by applying back pressure to females with the presenceof a mature boar and the weaning to estrus interval(WEI) of all sows were 5~6 day. Sowsdetected in estrus were mated at 12 hour after and mating interval was 12 hour by treatments. This experiment demonstrated that the lowest farrowing rate was observed AI3 treatment. Frequency of AI did not influence on reproductive performance when WEI was 5-6 day. Nosignificant differences were observed on litter size, born alive and litter birth weight. Consequently, decreased AI frequency did not have any detrimental effect on reproductiveperformance when estrus detection was adequate. Decreased AI frequency could reduce cost ofproduction of pigs when sows showed normal reproductive performance.
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