Korean Journal of Organic Agriculture (한국유기농업학회지)

Korean Association of Organic Agriculture (한국유기농업학회)
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Effects of Feeding Levels Above Maintenance Energy on Nutrients Digestibility and Energy Value in Hanwoo Steers

유지에너지 이상의 사료공급이 거세 한우의 영양소 소화율 및 에너지가에 미치는 영향

  • 류채화 (국립축산과학원 동물영양생리과) ;
  • 이성대 (국립축산과학원 동물영양생리과) ;
  • 이슬 (국립축산과학원 동물영양생리과) ;
  • 백열창 (국립축산과학원 동물영양생리과)
  • Received : 2023.10.25
  • Accepted : 2023.11.15
  • Published : 2023.11.30
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Abstract

Supplying an appropriate amount of feed is an economical and environmentally friendly by increasing the nutrient digestibility of livestock and reducing nutrients released from overfeeding. Therefore, this study was conducted to determine the nutrient digestibility according to dietary feeding levels of Hanwoo steers. Three treatments in feeding trial were used feeding amount based on the maintenance energy level of the Korean feeding standard for Hanwoo (2022): 100% (control, CON), 140% (treatment 1, TRT1), and 190% (treatment 2, TRT2). The experiment was designed in replicate 3×3 balanced Latin square designs using six Hanwoo steers. In this study, energy value was predicted according to treatment groups. In addition, nutrient digestibility and energy value were measured through a feeding trial to Hanwoo steers. All energy values, including total digestible nutrients and digestible energy, were predicted to decrease linearly with increasing feeding levels. TRT2 showed lower digestibility than CON for dry matter, crude protein, non-fiber carbohydrates, and total digestible nutrients in the feeding trial (p<0.05). However, there was no significant difference between CON and TRT1. Total digestible nutrients (TDN) and digestibility of feed are set based on the maintenance energy. However nutrient digestibility and TDN decreased when feeding level increased by more than 190% compared to maintenance energy in this study. Therefore, it is necessary to correct the TDN by considering the feeding level when mixing the feed.

Keywords

Acknowledgement

본 논문은 농촌진흥청 연구사업(PJ01691101) 및 2023년도 농촌진흥청 국립축산과학원 전문연구원 지원사업에 의해 이루어진 것임.

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