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Effects of Dietary Silicate Based Complex Mineral on Performance, Egg Quality and Immunological Competence in Laying Hens

규산염 복합광물질의 급여가 산란계의 생산능력, 계란품질 및 면역능력에 미치는 영향

  • Lim, Chun Ik (Department of Animal Science, Chonbuk National University) ;
  • Park, Jin Ern (Department of Animal Science, Chonbuk National University) ;
  • Kim, Sang Eun (Davistone, Co., Ltd.) ;
  • Choe, Ho Sung (Department of Animal Biotechnology, Chonbuk National University) ;
  • Ryu, Kyeong Seon (Department of Animal Science, Chonbuk National University)
  • 임천익 (전북대학교 동물자원과학과) ;
  • 박진언 (전북대학교 동물자원과학과) ;
  • 김상은 ((주)다비스톤) ;
  • 최호성 (전북대학교 동물생명공학과) ;
  • 류경선 (전북대학교 동물자원과학과)
  • Received : 2017.10.18
  • Accepted : 2017.12.18
  • Published : 2017.12.31

Abstract

This study was conducted to investigate the effect of feeding with dietary silicate based complex mineral (SCM) on the performance of laying hens. SCM at five levels (0%, 0.2%, 0.4%, 0.6% and 0.8%) was added to commercial diets, and fed to four hundred fifty Hy-Line Brown from fifty four to sixty five weeks of age. Egg production increased as the addition of dietary SCM to basal diets increased up to 0.6% (P<0.05). Furthermore, Feed intake increased in a manner similar to that of egg production (P<0.05). However, there was no difference in feed efficiency among the treatments. Eggshell thickness and breaking strength were significantly higher for the chickens fed with SCM than control from sixty weeks old to the end of experiment (P<0.05). Similarly, albumen height and Haugh unit were significantly higher for the chickens fed with SCM compared to those of control group (P<0.05). AST of birds fed SCM showed significantly higher than control (P<0.05). However, blood neutral fat level tended to increase in SCM treatments. Moreover, bone mineral density increased with SCM addition up to 0.4% (P<0.05). IL-2 (Interleukin-2) and IL-6 (Interleukin-6) levels appeared to be improved in the chickens fed with SCM addition diets, although not statistically different from all treatments. The results of this study indicated that the optimum SCM for improving the performance, egg quality and immunological competence of laying hens from 54 to 65 weeks of age was 0.6%.

본 연구는 규산염 복합광물질의 첨가 급여가 산란계에 미치는 영향을 구명하기 위하여 실행하였다. 54주령 하이라인 산란계 450수를 개체별 케이지에 수용하였으며, 처리구는 시판용 사료에 규산염 광물질 0%, 0.2%, 0.4%, 0.6% 및 0.8% 수준으로 첨가하여 처리구당 5반복 반복당 18수씩 12주간 급여하였다. 산란율, 사료섭취량, 사료요구율, 계란품질은 4주단위로 측정하였으며, 혈액 성상 및 면역력, 골밀도는 실험종료 시에 측정하였다. 전 사양시험 기간에 산란율은 0.6% 첨가수준에서 현저하게 증가하였고(P<0.05), 사료섭취량도 산란율과 동일한 경향을 보였지만(P<0.05), 사료요구율은 처리구간에 통계적 차이가 없었다. 난각 강도와 두께는 광물질 첨가수준이 증가함에 따라 대조구보다 현저히 높게 나타났으며(P<0.05), 난백높이와 호유닛도 동일한 경향을 보였다(P<0.05). 혈청 글루코오스는 광물질의 첨가수준이 증가함에 따라서 대조구보다 높은 경향을 보였으며(P<0.05), 산란계 경골 밀도는 규산염 광물질 0.4% 첨가 급여구에서 가장 높게 나타났지만(P<0.05) 보다 높은 광물질 급여수준에서는 감소되었다. IL-2과 IL-6는 0.6%첨가구에서 통계적 차이는 없었지만 높은 경향을 보였다. 본 연구 결과 산란후기로 진입하는 54~65 주령 산란계 생산성의 극대화를 위한 규산염 복합광물질 최적 첨가 급여수준은 0.6%로 구명되었다.

Keywords

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