Korean Journal of Poultry Science (한국가금학회지)

The Korean Society of Poultry Science (한국가금학회)
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Effects of Dietary Germanium on the Performance, Egg Quality and Blood Composition for the Finishing Stage of Laying Hens

산란말기에 게르마늄의 첨가 급여가 산란계의 생산성과 계란품질 및 혈액성상에 미치는 영향

  • Lim, Chun Ik (Department of Animal Science, Chonbuk National University) ;
  • Moon, Hong Kil (Poultry Research Institute, National Insititute of Animal Science, RDA) ;
  • Kim, Sang Ho (Poultry Research Institute, National Insititute of Animal Science, RDA) ;
  • Choe, Ho Sung (Department of Animal Biotechnology, Chonbuk National University) ;
  • Ryu, Kyeong Seon (Department of Animal Science, Chonbuk National University)
  • 임천익 (전북대학교 동물자원과학과) ;
  • 문홍길 (국립축산과학원 가금연구소) ;
  • 김상호 (국립축산과학원 가금연구소) ;
  • 최호성 (전북대학교 동물생명공학과) ;
  • 류경선 (전북대학교 동물자원과학과)
  • Received : 2018.02.19
  • Accepted : 2018.03.21
  • Published : 2018.06.30
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Abstract

This study was conducted to assess the effect of dietary addition of Germanium (Ge) on performance, egg quality, serum biochemical properties and yolk fatty acid composition in laying hens. At 74 weeks of age, a total of 360 Hy-line brown commercial layers were divided into four treatments with five replicates per treatment. Four dietary levels of Ge (0, 1, 2 and 4%) were added to the basal diets (ME: 2,750 kcal/kg, CP: 16%) and fed corresponding diet for a period of 12 weeks. The effects of these treatments on production performance and egg quality were measured three times at four week intervals, and at the end of the experiment, blood and egg yolk fatty acid were analyzed. The results showed that production performance parameters including egg production rate, feed intake, egg weight, egg mass and feed conversion ratio were non-significant, but dietary addition of 2% Ge tended to increase egg production rate. Eggshell strength was found to be significantly higher in Ge supplemented groups than in the control group (P<0.05), and eggshell thickness was also trended to be improved in Ge treated groups. In serum, triglyceride content was significantly greater (P<0.05), and the highest total cholesterol was found in hens of the control group as compared with that of the Ge supplemented groups. The yolk fatty acid composition including polyunsaturated fatty acid, unsaturated fatty acid and saturated fatty acid were not affected among the treatments but addition of 2 or 4% Ge in basal diet had significantly (P<0.05) increased monounsaturated fatty acid. Therefore, supplementation of Ge in laying hens diet has positive effects on egg quality and triglyceride in serum.

본 연구는 산란말기 사료에 게르마늄의 수준별 급여가 닭의 생산성, 계란품질 및 혈액 성상에 미치는 영향을 구명하고자 시행하였다. 74주령 하이라인 브라운 산란계 360수를 4개 처리 5반복 반복당 18수씩 배치하여 총 12주간 사양실험을 실시하였으며, 처리구는 영양소 함량이 ME 2,750 kcal/kg, CP 16% 수준의 기초사료에 게르마늄 분말을 0, 1, 2 및 4% 수준으로 첨가하였다. 산란율과 난중은 매일, 사료섭취량과 계란품질은 4주 간격으로 조사하였고, 혈액성상과 난황지방산은 사양실험 종료 후 측정하였다. 산란율은 게르마늄 급여구에서 대조구에 비하여 높은 경향을 보였지만 통계성은 없었고, 사료섭취량, 난중, 1일 산란량 및 사료요구율은 처리구 간에 유의적 차이는 없었다. 계란의 난백높이와 호유닛은 처리구 간 유의적 차이가 없었지만, 난각강도는 게르마늄 급여구에서 현저하게 개선되었으며(P<0.05), 난각두께도 개선되는 경향을 보였다. 계란 내 난황지방산중 단일불포화 지방산은 게르마늄 급여구에서 유의적으로 증가하였고(P<0.05), 불포화지방산도 증가하는 경향을 보였다. 혈액성상에서 콜레스테롤은 처리구 간에 통계적 차이가 없었지만 게르마늄 급여수준에 비례적으로 감소되는 경향을 보였으며, 중성지방은 현저하게 감소되었다(P<0.05). 본 연구결과, 산란말기 사료에 게르마늄의 첨가급여는 난각강도를 높게 하였고, 건강관련 인자에 속하는 혈중 콜레스테롤과 중성지방을 개선하였다.

Keywords

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