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Effect of Dietary Energy Levels and Bedding Materials on Performance, Meat Quality and Foot Pad Score of Male and Female Slow-Growing Korean Meat-Type Chicken (Hanhyop 3)

사료 에너지 수준과 깔짚 종류가 한협 3호 육계의 암·수별 성장, 육질, Foot Pad Score에 미치는 영향

  • Lee, Jun Yeop (National Institute of Animal Science, RDA) ;
  • Lee, Myung Ho (College of Animal Life Sciences, Kangwon National University) ;
  • Song, Yong Han (College of Animal Life Sciences, Kangwon National University) ;
  • Lee, Jong In (College of Animal Life Sciences, Kangwon National University) ;
  • Ohh, Sang Jip (College of Animal Life Sciences, Kangwon National University)
  • 이준엽 (국립축산과학원) ;
  • 이명호 (강원대학교 동물생명과학대학) ;
  • 송영한 (강원대학교 동물생명과학대학) ;
  • 이종인 (강원대학교 동물생명과학대학) ;
  • 오상집 (강원대학교 동물생명과학대학)
  • Received : 2018.11.12
  • Accepted : 2018.12.17
  • Published : 2018.12.31

Abstract

Two diet energy levels (high or low) and two bedding material (rice husk or saw dust) treatments were designed for either male or female slow-growing Korean meat-type chicken (Hanhyop 3) to make totally eight treatments for 11~75 d feeding trial. Body weight gain (BWG) were influenced by energy levels, sex of bird and bedding material type. There were interaction effect among those three factors. Feed intakes (FI) by male bird during each and overall periods were higher than those by female. Diet energy levels and bedding material affected the FI only during final 56~75 d period, of which FI of high energy diet was higher in male whereas that of low energy diet was higher in female. Although feed conversion ratio (FCR) was improved by high energy diet, the better FCR has dissipated during 41~75 d, when the most of overall BWG were achieved. Apparent total tract retention (ATTR) of nutrients were higher in male than those in female birds with exception on fat ATTR. Fat ATTR was improved when fed low energy diet regardless of the sex of birds. Both energy levels and sex of bird influenced the color of breast. Thiobarbituric acid reactive substances (TBARS) value of female thigh was higher than that of male. Levels of moisture and P in female thigh were lower although level of fat in female breast was higher than those in male, respectively. This study showed that diet energy levels for Hanhyop 3 chicken, especially during 41~75 d, should be differently formulated between male and female bird.

사료 에너지 수준(고, 저), 깔짚 종류(왕겨, 톱밥), 성별(암 수) 등 세 요인을 각각 달리하여 한협 3호 육계(토종닭)를 대상으로 연구한 결과는 다음과 같다. 깔짚, 사료에너지 수준, 성별 모두 증체량에 영향을 미쳤고, 이들 요인 간 상호효과도 나타났다. 성별에 따라 사료섭취량에 차이가 나타났으나 깔짚이나 사료에너지 수준은 특정 일령의 사료섭취량에만 영향을 미쳤다. 사료요구율은 고 에너지 사료에서 낮았으나, 41~75일령 사료요구율은 차이가 없었다. 지방 이외의 영양소 이용률은 모두 암컷에 비하여 수컷이 높았으며, 지방의 이용률은 성별에 상관없이 저에너지 사료에서 높았다. 가슴육의 색은 사료 에너지 수준과 성별에 따라 달랐고, 다리육의 TBARS가는 암컷에서 높았다. 가슴육의 지방함량은 암컷에서, 다리육의 인과 수분 함량은 수컷에서 높았다. 본 연구로 한협 3호에 대한 사료 에너지 수준, 특히 대부분의 증체가 이루어지는 41~75일령 기간의 사료 에너지 수준을 설정할 때 암 수 간 차이를 두는 것이 바람직하며, 56일령 이후 암컷에는 고 에너지 사료가 오히려 증체량이나 사료요구율에서 불리하다는 점을 알게 되었다.

Keywords

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