Journal of Animal Science and Technology

  • 제50권3호
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  • Pages.343-354
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  • 2008
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  • 2672-0191(pISSN)
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  • 2055-0391(eISSN)
한국축산학회 (Korean Society of Animal Sciences and Technology)
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산란계의 육성기 제한급여가 체성장 특성 및 내분비 변화에 미치는 영향 미치는 영향

Effects of Restricted Feeding during Growing Period on Growth and Endocrine Profile in Layers

  • Kang, Hwan Ku (Poultry Science Division, Livestock Resource Development, National Institute of Animal Science, RDA) ;
  • Cho, Jae Hoon (Buchon National Livestock Cooperatives Federation) ;
  • Kim, Ji Hyuk (Poultry Science Division, Livestock Resource Development, National Institute of Animal Science, RDA) ;
  • Kang, Geun Ho (Poultry Science Division, Livestock Resource Development, National Institute of Animal Science, RDA) ;
  • Yu, Dong Jo (Poultry Science Division, Livestock Resource Development, National Institute of Animal Science, RDA) ;
  • Na, Jae Cheon (Poultry Science Division, Livestock Resource Development, National Institute of Animal Science, RDA) ;
  • Kim, Dong Wook (Poultry Science Division, Livestock Resource Development, National Institute of Animal Science, RDA) ;
  • Lee, Sang Jin (Poultry Science Division, Livestock Resource Development, National Institute of Animal Science, RDA) ;
  • Kim, In Shik (Department of Veterinary Anatomy, Chonbuk National University) ;
  • Kim, Sang Ho (Poultry Science Division, Livestock Resource Development, National Institute of Animal Science, RDA)
  • 발행 : 2008.06.01
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초록

본 연구는 산란계의 육성기 제한급여가 체성장 특성 및 내분비 변화에 미치는 영향을 구명하고자 1일령 갈색산란계 Isa-brown 1,080수를 공시하여 시험을 실시하였다. 육성기 제한급여 처리내용으로는 자유채식, 6~18주령까지 제한급여, 12~18주령까지 제한급여를 각각 실시하였으며 모든 사료영양소 함량 및 단계별 사료급여는 NRC(1994)에 준하여 실시하였다. 육성기간동안 체중과 사료섭취량은 6~18주령 제한급여 처리구가 가장 낮았으나(P<0.05) 20주령에서 각 처리구간 유의적 차이는 나타나지 않았다. 소화기관 및 실질장기 발달은 처리구간에 뚜렷한 차이는 없었으나 육성기간동안 체중이 낮았던 제한급여 처리구에서 다소 높은 비율을 보였다.체조성은 지방 함량에서 처리구간 유의성이 나타났는데 자유급여 처리구에 비해 6~18주령 제한급여 처리구에서 육성기간동안 유의적으로 낮게 나타났다(P<0.05). IGF-Ⅰ는 육성기간동안 높은 수준을 보였으나 번식기관이 발달하는 시기부터 급격히 하락하여 낮은 수준으로 유지되면서, 사료섭취량에 민감한 반응을 보였다. estradiol은 6주령 이후 전체적으로 증가하는 양상을 보였는데 16~17주령 사이에 증가하는 양상을 보였으며 종료 시까지 높은 수준을 유지하였는데 처리구간에 유의성은 나타나지 않았다.이상의 결과에서 6~18주 제한급여 처리구가 육성기간동안 체중, 증체량 및 사료섭취량은 자유급여 처리구에 비해 낮았으며(P<0.05), 지방함량 또한 적게 나타났다(P<0.05). 따라서 육성기 제한급여를 육성초기에 실시할 경우 체내 대사에 있어 큰 영향을 미치지 않았으며 estradiol 수준 역시 안정적으로 나타났다. 따라서, 본 연구 결과는 육성기 제한급여가 산란계 성장에 있어서 내분비와 체성장 조성에 영향하지 않으며 또한, 최근 곡물가격의 상승으로 인한 사료가격의 상승에 대한 문제를 해결 할 수 있는 해결방안으로 충분한 가치가 있을 것으로 사료된다. 하지만, 좀 더 개선되어져야 할 부분이 많은 만큼 향후 지속적으로 제한 급여 수준 및 기간 등에 관한 세밀한 연구가 이루어져야 할 것으로 사료된다.(색인어:산란계, 제한급여, Insulin-like growth factor-Ⅰ, 체성분)

The objective of this study was to investigate the effect of restricted feeding to pullet on growth and endocrine profile in layers(Isa brown). One thousand eighty brown-layer chicks were divided into three treatments; conventional feeding(ad libitum) and two restricted feedings(80% of conventional diet) for 70 weeks. One of restricted feeding started from seven to seventeen weeks of age, and the other started from twelve to seventeen weeks of age. Diets were formulated by NRC(1994) recommendation. Body weight and feed intake were measured every two weeks, and body composition and organ weight analyzed every week in rearing period and every eight weeks in laying period. Blood was collected at weighing body weight and was analyzed for the concentration of insulin-like growth factor-Ⅰand estradiol. Body weight and feed intake decreased as restriction of feeding begins comparing to ad libitum group(P<0.05), but reached to similar body weight and feed intake at 20 wk of age regardless of restriction. There were no significant differences in development of digestive tract and attached organs among the treatment groups. During rearing period, however, they were slightly higher in restricted group which was low in body weight. In terms of body composition, fat contents of restricted group were significantly lower(P<0.05) than that of ad libitum group around 1,000 grams of body weight. High concentration of IGF-Ⅰwas observed.

키워드

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