Journal of Animal Science and Technology

  • 제66권3호
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  • Pages.514-522
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  • 2024
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  • 2672-0191(pISSN)
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  • 2055-0391(eISSN)
한국축산학회 (Korean Society of Animal Sciences and Technology)
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Determination of optimal energy system and level for growing pigs

  • Sangwoo Park (Department of Animal Science, University of California) ;
  • Jeehwan Choe (Department of Livestock, Korea National University of Agriculture and Fisheries) ;
  • Jin Ho Cho (Department of Animal Science, Chungbuk National University) ;
  • Ki Beom Jang (Department of Animal Science, North Carolina State University) ;
  • Hyunjin Kyoung (Division of Animal and Dairy Science, Chungnam National University) ;
  • Kyeong Il Park (Division of Animal and Dairy Science, Chungnam National University) ;
  • Yonghee Kim (Division of Animal and Dairy Science, Chungnam National University) ;
  • Jinmu Ahn (Division of Animal and Dairy Science, Chungnam National University) ;
  • Hyeun Bum Kim (Department of Animal Resources Science, Dankook University) ;
  • Minho Song (Division of Animal and Dairy Science, Chungnam National University)
  • 투고 : 2023.05.24
  • 심사 : 2023.06.26
  • 발행 : 2024.05.31
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초록

This study mainly evaluated the responses in growth performance of growing pigs to different energy systems and energy levels in diets. Subsequently, we compared the nutrient digestibility and digestible nutrient concentrations of each energy level diet. In experiment 1, a total of 144 growing pigs with an average initial body weight (BW) of 26.69 ± 7.39 kg were randomly allotted to six dietary treatments (four pigs/pen; six replicates/treatment) according to a 2 × 3 factorial arrangement resulting from two energy systems (metabolizable energy [ME] and net energy [NE]) and three energy levels (low [LE], recommended [C], and high energy [HE]). Pigs were fed the experimental diets for 6 weeks and were allowed free access to feed and water during the experimental period. In experiment 2, 12 growing pigs with an average initial BW of 27.0 ± 1.8 kg were randomly allotted to individual metabolism crates and fed the six diets in a replicated 6 × 6 Latin square design. The six dietary treatments were identical to those used in the growth trial. Pigs were fed their respective diets at 2.5 times the estimated energy requirement for maintenance per day, and this was divided into two equal meals provided twice per day during the experimental period. Differences in energy systems and energy levels had no significant effect on the growth performance or nutrient digestibility (except acid-hydrolyzed ether extract [AEE]) of growing pigs in the current study. However, the digestible concentrations of ether extract, AEE, and acid detergent fiber (g/kg dry matter [DM]) in diets significantly increased (p < 0.05) with increasing energy levels. Additionally, there was a tendency (p = 0.09) for an increase in the digestible crude protein content (g/kg DM) as the energy content of the diet increased. Consequently, differences in energy systems and levels did not affect the BW, average daily gain, and average daily feed intake of growing pigs. This implies that a higher variation in dietary energy levels may be required to significantly affect growth performance and nutrient digestibility when considering digestible nutrient concentrations.

키워드

과제정보

This study was supported by the Cooperative Research Program for Agriculture Science and Technology Development (Project No. RS-2023-00230754), Rural Development Administration, Korea.

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