한국가금학회지 (Korean Journal of Poultry Science)

  • 제34권4호
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  • Pages.279-286
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  • 2007
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  • 1225-6625(pISSN)
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  • 2287-5387(eISSN)
한국가금학회 (The Korean Society of Poultry Science)
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무염 사료의 급여가 유도환우에 미치는 영향

Effects of Feeding Non-Salt Diet on the Induced Molting in Laying Hens

  • Hong, E.C. (National Institute of Animal Science) ;
  • Na, J.C. (National Institute of Animal Science) ;
  • You, D.C. (National Institute of Animal Science) ;
  • Kim, H.K. (National Institute of Animal Science) ;
  • Chung, W.T. (National Institute of Animal Science) ;
  • Lee, H.J. (National Institute of Animal Science) ;
  • Kim, I.H. (Department of Animal Resources & Science, Dankook University) ;
  • HwangBo, J. (National Institute of Animal Science)
  • 발행 : 2007.12.31
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초록

본 시험은 동물복지의 관점에서 주정박과 무염 사료를 이용하여 급이 환우법을 실시하고, 절식에 의한 환우법과 환우 후 산란계의 생산성을 비교 검토하기 위해 수행하였다. 공시동물은 산란율 80% 이상, 평균 체중 $1.8{\pm}0.1kg$인 67주령 White Leghorn 108수를 이용하였다. 처리구는 환우처리 하지 않은 미환우구(대조구)로, 비급이 환우구(9일간 절식, 그 후 19일간 환우 사료)와 급이 환우구(주정박, 무염 사료)를 시험구로, 총 4처리구를 설정하였으며, 처리구당 3반복, 반복당 9수씩 108수를 완전 임의 배치하였다. 환경 순치 기간으로서 환우 전 2주간 모든 공시계에게 동일한 산란 후기 사료(CP 15%, ME 2,700 kal)를 급여하였다. 환우 기간은 전처리구에서 28일 동안 환우를 유도하였다. 산란율에서, 환우 사료 급이구는 환우 처리 후 6일째부터 12일 동안 산란율이 감소하였으며, 12일 후에 산란율이 0%가 되었다. 무염 사료 급이구는 환우처리 후 5일째부터 10일 동안 산란율이 감소하였으며, 10일 후에 산란율이 0%가 되었다. 비급이 환우구는 절식 2일째부터 산란율이 급격히 감소하여 6일째에 0%가 되었다. 환우 시험 종료 후 산란 후기 사료를 다시 급여하였을 때, 환우 사료와 무염 사료 급이구는 급여 12일째 산란이 다시 시작되었으며, 비급이 환우구는 16일째 산란이 다시 시작되었다. 체중 변화를 보면, 급이 환우구에서는 환우 사료를 급여한 경우, 28일째 48.3%까지 체중의 감량이 있었으나, 무염사료는 21.4%의 체중 감량을 보였다. 비급이 환우구에서는 절식시킨 9일까지는 체중의 급격한 감소가 있었으나, 9일 이후 환우 사료를 급여하는 19일 동안에는 약간의 증체가 일어났다. 환우가 끝난 후 간, 심장, 난포수란관의 무게를 비교 한 결과, 환우처리구에서 무게가 크게 감소하였다(p<0.05). 계란 품질은 환우 처리구에서 난중, 난각 두께, 난각 강도 및 하우유니트가 개선되었으나(p<0.05), 난황색은 차이가 없었다(P>0.05). 전자 현미경을 이용하여 환우를 유도한 계란의 난각 조직은 환우 처리구의 난각 조직이 비환우구보다 치밀하였다. 결론적으로, 급이 환우가 동물 복지의 관점에서 절식환우를 대신할 수 있을 것으로 사료되나, 금후 추가적인 연구가 요구된다.

This study was conducted to induce molting with DDGS and non-salt diet and compare the effect of feeding molting and fasting molting on the performance, egg quality, and visceral organs in laying hens for animal welfare. One-hundredeight 62-wk-old White Leghorn hens that egg production was over 80% and average weight was $1.8{\pm}0.1kg$ were used in this study. Treatments were control(non-molt treatment), feeding molt treatment(DDGS, non-salt diet), and fasting molt treatment. The four treatments were administered to three replicate group of nine hens wherein each group. All treatment groups were fed the basal diet(CP 15%, ME 2,700 kal/kg) for two weeks as the adaptation period. Test Periods were 28 days at all treatments. Egg production decreased for 18 days to be 0% at feeding molting treatment, and for 17 days to be 0% at non-salt feeding molting treatment. Egg production stopped for 6 days at fasting molting treatment. Egg production restarted after 12 days molt at feeding molting treatment, while after 16 days at fasting molting treatment. On the egg quality was improved at molting treatments (p<0.05) except egg yolk. Egg shell tissue was crowded at molting treatment to compare to control. Liver weights, heart weight, and oviduct weight of laying hens decreased at molting treatments(p<0.05). Finally, feeding molting might could be replaced fasting molting on the welfare and further studies were needed about molting program.

키워드

참고문헌

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피인용 문헌

  1. Comparison of Performance of Laying Hens in Molting Methods vol.35, pp.4, 2009, https://doi.org/10.5536/KJPS.2009.35.4.391