Food Science of Animal Resources (한국축산식품학회지)

Korean Society for Food Science of Animal Resources (한국축산식품학회)
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Effects of Feeding Rhus verniciflua Extract on Egg Quality and Performance of Laying Hens

옻나무 추출액 급여가 산란계의 생산성 및 계란 품질에 미치는 영향

  • Kang, Hwan-Ku (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) ;
  • Na, Jae-Cheon (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) ;
  • 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, Sang-Ho (Poultry Science Division, Livestock Resource Development, National Institute of Animal Science, RDA)
  • 강환구 (농촌진흥청 축산과학원 가금과) ;
  • 강근호 (농촌진흥청 축산과학원 가금과) ;
  • 나재천 (농촌진흥청 축산과학원 가금과) ;
  • 유동조 (농촌진흥청 축산과학원 가금과) ;
  • 김동욱 (농촌진흥청 축산과학원 가금과) ;
  • 이상진 (농촌진흥청 축산과학원 가금과) ;
  • 김상호 (농촌진흥청 축산과학원 가금과)
  • Published : 2008.12.31
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Abstract

This experiment was conducted to investigate the effects of drinking of Rhus tree-extract on laying performance and egg quality in hens. Four hundred eighty, 55-wk-old ISA brown, laying hens were divided into six groups, control, Rhus tree-extract 500 ppm, 1,000 ppm, 2,000 ppm, 3,000 ppm and 5,000 ppm. The hens were fed a supplemented drink containing Rhus tree-extract for 12 weeks. Egg production and egg mass increased by drinking Rhus tree-extract (p<0.05) and the feed conversion ratio also improved in Rhus tree-extract groups. Cecal numbers of Lactobacillus spp., E. coli and Salmonella were not different in treatments. Availability of protein and ash improved in the Rhus extract groups. The eggshell breaking strength and egg shell thickness were significantly increased in Rhus tree-extract 3,000 ppm and Rhus tree-extract 2,000 ppm groups compared to the other groups. Also, egg yolk color and Haugh unit were significantly improved by the dietary Rhus tree-extract (p<0.05).

본 연구는 옻나무 추출액의 급여가 산란계 생산성, 계란품질 및 저장기간에 따른 계란 신선도에 미치는 영향을 구명하고자 시험을 실시하였다. 시험은 6처리 4반복 반복당 20수씩 공시하였으며, 옻 추출액 무침가구(C), 500 ppm(T1), 1,000 ppm(T2), 2,000 ppm(T3), 3,000 ppm(T4), 5,000 ppm(T5)으로 처리구를 배치하여 총 12주간 시험을 실시하였다. 총 산란율은 T5 처리구에서 90.2%로 전체 처리간 비교 시 가장 높았으며, 산란량은 5,000 ppm 첨가구에서 59.7로 높게 나타났다(p<0.05). 사료 섭취량에서는 대조구와 비교시 옻나무 추출액 첨 가구에서 유의적으로 감소하는 경향을 나타내었으며(p<0.05), 옻나무 추출액 1,000 ppm 첨가구인 T2 처리구에서 118.5 g/hen으로 가장 낮았고(p<0.05), 사료 요구율에 있어서는 전체 처리구간 비교 시 T5 처리구에서 유의적으로 가장 낮게 나타났다(p<0.05). 시험 기간 동안 난각강도는 T4 처리구와 T3 처리구에서 가장 우수하였으며, 난황색은 전체 처리구간 비교 시 T2 처리구에서 유의적으로 높게 나타났다(p<0.05). Haugh unit은 대조구와 비교 시 옻나무 추출액 5,000 ppm 첨가구인 T5 처리구에서 가장 높았고 저장기간에 따른 Haugh unit 변화 역시 옻나무 추출액 급여에 의하여 향상되는 결과를 보였다. 영양소 소화율에서는 전체 처리구 간 비교 시 옻나무 추출액 첨가구에서 단백질과 회분의 이용률이 향상되는 결과를 보였으며 특히 옻나무 추출액 3,000ppm 및 5,000 ppm 급여구가 유의적으로 향상되었다(p<0.05). 결과적으로 산란계 사료 내 적정 수준의 옻나무 추출액을 첨가 급여는 산란계의 생산성을 증가시키며, 계란 품질에 있어 난각질 및 난황색의 개선과 함께 저장 기간 중 신선도에 있어 안정성을 갖는 것으로 나타났다.

Keywords

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