Journal of Animal Science and Technology

Korean Society of Animal Sciences and Technology (한국축산학회)
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Nutrient Utilization of Broiler Litter and Bakery By-product Ration in Sheep

육계분-제과부산물 발효 완전혼합사료(TMR)의 면양 체내에서의 영양소 이용성 평가

  • Kwak, W.S. (Animal Science, School of Life Resource and Environmental Sciences, College of Natural Sciences, Konkuk University) ;
  • Yoon, J.S. (Animal Science, School of Life Resource and Environmental Sciences, College of Natural Sciences, Konkuk University) ;
  • Jung, K.K. (Dept. of Animal and Life Science, College of Natural Resources, Yeungnam University)
  • 곽완섭 (건국대학교 자연과학대학 생명자원환경과학부 축산학전공) ;
  • 윤정식 (건국대학교 자연과학대학 생명자원환경과학부 축산학전공) ;
  • 정근기 (영남대학교 자연자원대학 생물자원학부 동물생명과학전공)
  • Published : 2003.08.30
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Abstract

This study was conducted to determine the effect of feeding a total mixed ration(TMR) of broiler litter(BL) and bakery by-product(BB) with additional BL or rice straw incorporated at 10% of dietary DM as a roughage source on behavior pattern, nutrient intake, digestibility, digestible nutrient intake, ruminal and blood parameters, and N balance of sheep. All the treatment diets were formulated to be isoenergetic[total digestible nutrients(TDN) 66.9%]. Compared with the conventional formulated feed - rice straw feeding system(control), feeding TMR with BL(T1) or rice straw(T2) at 10% of dietary DM resulted in reduced eating, ruminating and total chewing time(P<0.05), similar DM intake, low(P<0.05) digestible DM, OM, fiber and total nutrients intake, low(P<0.05) nutrients digestibilities except EE, similar ruminal characteristics(pH, VFA concentrations and ratios, efficiency of carbohydrate fermentation, NH3-N), and favorable N digestion and retention. There were no differences in the above parameters between T1 and T2 with the exception of increased(P<0.05) eating, ruminating and total chewing time for T2. These results suggested that a TMR of BL and BB with or without rice straw may replace the conventional formulated feed and rice straw in ruminant diets successfully and furthermore feeding the TMR with rice straw made sheep behavior pattern more favorable.

본 실험은 육계분과 제과부산물로 제조된 TMR(TDN 69%)에 입자도가 각기 다른 여분의 육계분과 볏짚(diet DM의 10% 수준)을 혼합하여 기존의 배합사료와 볏짚 급여 체계(대조구)를 100% 대체하였을 때 면양에 의한 행동 양상, 영양소 섭취량, 체내 소화율, 가소화 영양소 섭취량, 반추위 성상, 혈액 성상 및 체내 질소 출납에 미치는 영향을 평가하고자 실시하였다. 대조구와 비교해서 TMR 급여구들은 일일 섭취시간, 반추시간, 총 저작시간이 감소하였고(P<0.05), 음수시간은 증가하였으며(P<0.05), 사료 DM 섭취량이 비슷한 상황에서 가소화(digestible) DM, OM, fiber 및 총 영양소 섭취량은 낮았으며(P<0.05), EE를 제외한 영양소 소화율 또한 낮았으나(P<0.05), 반추위 발효 성상(pH, VFA 생성량 및 비율, acetate/ propionate 비율, 탄수화물 발효 효율, 반추위 NH3-N)과 혈중 urea-N 농도는 별 차이 없이 정상적이었으며, 특히 사료 단백질의 체내 활용성(소화율 및 축적율)은 양호한 것으로 나타났다. TMR에 입자도가 작은 육계분을 입자도가 큰 볏짚으로 diet DM의 10% 수준을 대체하였을 때, 일일 섭취시간, 반추시간, 총 저작시간은 증가하였으며(P<0.05), 음수시간은 정상에 가깝게 감소하였고(P<0.05), 그 외의 상기한 parameter에는 전혀 영향을 미치지 않았다. 결과적으로 육계분과 제과부산물로서 적정사료 에너지 수준을 고려하여 제조된 TMR은 반추동물의 기존 배합사료-볏짚 급여 체계를 대체할 수 있는 잠재적 가능성을 시사하였으며, 특히 TMR 급여 시 소량의(건물 10% 수준) 볏짚 공급은 면양의 행동 양상을 보다 양호하게 만들었다.

Keywords

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