Journal of agriculture & life science (농업생명과학연구)

Institute of Agriculture & Life Science, Gyeongsang National University (경상대학교 농업생명과학연구원)
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Effects of Concentrate Feeding Level after Sexual Maturity on the Growth and Breeding Performances, Blood Composition, and Ultrasonic Carcass Traits in Hanwoo Cows

성 성숙기 이후 농후사료 급여수준이 한우 암소의 성장과 번식능력, 혈액성상 및 초음파 도체성적에 미치는 영향

  • Jeong, Chan Sung (Gyeonggido Livestock and Veterinary Service) ;
  • Jang, Sun Sik (National Institute of Animal Science, RDA) ;
  • Lee, Sung Sill (Division of Applied Life Science(Institute of Agriculture & Life Science), Gyeongsang National University) ;
  • Moon, Yea Hwang (Department of Animal Science & Biotechnology, Gyeongnam National University of Science and Technology)
  • 정찬성 (경기도축산위생연구소) ;
  • 장선식 (농촌진흥청 축산과학원) ;
  • 이성실 (경상대학교 응용생명과학부(농업생명과학연구원)) ;
  • 문여황 (경남과학기술대학교 동물생명과학과)
  • Received : 2016.02.05
  • Accepted : 2016.07.14
  • Published : 2016.08.31
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Abstract

This study was conducted to investigate the effect of low feeding level of concentrate after sexual maturity(14 month old) on the growing and breeding performances in Hanwoo cows. Eighteen cows(average body wt. 251kg) were alloted to two groups by completely randomized design, and fed a commercial formula feed by 0.8%(T1) and 1.2%(T2) of body weight for 30 months of total experimental period(feeding trial of 20 months, breeding trial of 10 months). When the results of this experiment compared to the Korean feeding standard for Hanwoo(2012), the reason of low growing performance in T1 was induced from low protein intake rather than energy. The change of body size by feeding levels was significantly appeared at chest width and body length, particularly chest width of cows in T1 was rather reduced by 3.7% in the final than the initial measurement. Ovarian size of T1 was only 63% of T2, and pregnancy rate(33.3% : 77.8%) and birth wight of calf(22.5kg : 29.5kg) were also seriously repressed by low intake of dietary protein after sexual maturity in Hanwoo cow. It was appeared that the growing and breeding performances of Hanwoo cows were more affected by the level of dietary protein rather than energy in the feeding after sexual maturity.

본 시험은 성 성숙기의 한우 암송아지 18두(14개월령, 평균체중 251kg)를 이용하여 저 수준의 농후사료 급여에 따른 성장과 번식능력에 미치는 영향을 규명하기 위하여 실시하였다. 공시축은 시판 한우 번식우용 배합사료를 체중의 0.8%(T1) 및 1.2%(T2)씩 총 30개월(사양시험 20개월, 번식능력시험 10개월) 동안 섭취하였으며, 처리구당 9두를 2우리에 완전임의 배치를 하였다. 본 시험의 사양시험 결과를 한국가축사양표준의 영양소 요구량과 비교해 볼 때, T1구에서 성장이 제대로 되지 못한 이유는 에너지 보다는 단백질 섭취부족 때문인 것으로 나타났다. 공시축의 체형변화에서 저 영양수준으로 인하여 영향을 가장 많이 받는 부위는 흉폭과 체장이었으며 특히, 흉폭은 시험시작시보다도 종료시 측정치가 오히려 3.7% 작았다. 난소의 크기는 T1구가 T2구의 약 63%수준밖에 되지 않았으며, 수태율(33.3% : 77.8%)과 송아지의 생시체중(22.5kg : 29.5kg)도 T1구에서 심각하게 저하되었다. 따라서 한우번식우 사양에 있어서 성성숙기 이후에도 에너지보다는 단백질 공급수준에 의해 사양성적 및 번식능력에 많은 영향을 끼치는 것으로 나타났다.

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Cited by

  1. Effect of Feeding Level of High Energy-TMR for Growing Phase on Growth Performance, Carcass Characteristics and Economic Analysis in Fattening of Hanwoo Heifers vol.52, pp.5, 2016, https://doi.org/10.14397/jals.2018.52.5.51