Effects of high-protein concentrates with different rumen undegradable-to-degradable protein ratios on performance and carcass traits in 26-month-slaughtered Hanwoo steers
Objective This study investigated the effects of high-protein concentrates with two different rumen undegradable protein (RUP)-to-degradable protein ratios on the performance and carcass characteristics of Hanwoo steers reared for 26 months. Methods Thirty-two Hanwoo steers (217±13 kg) were randomly...
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Asian-Australasian Association of Animal Production Societies
2025-06-01
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| Series: | Animal Bioscience |
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| Online Access: | http://www.animbiosci.org/upload/pdf/ab-24-0728.pdf |
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| author | Woo Hyeong Hong Rajaraman Bharanidharan Tae Hoon Kim Jun Suk Byun Geum Hwi Bang Krishnaraj Thirugnanasambantham Joonpyo Oh Ridha Ibidhi Sun Sik Jang Kyoung Hoon Kim |
| author_facet | Woo Hyeong Hong Rajaraman Bharanidharan Tae Hoon Kim Jun Suk Byun Geum Hwi Bang Krishnaraj Thirugnanasambantham Joonpyo Oh Ridha Ibidhi Sun Sik Jang Kyoung Hoon Kim |
| author_sort | Woo Hyeong Hong |
| collection | DOAJ |
| description | Objective This study investigated the effects of high-protein concentrates with two different rumen undegradable protein (RUP)-to-degradable protein ratios on the performance and carcass characteristics of Hanwoo steers reared for 26 months. Methods Thirty-two Hanwoo steers (217±13 kg) were randomly allocated to eight pens (four animals/pen) and assigned to one of two concentrate treatments (four pens/treatment), low-RUP concentrate (LRUP; RUP ratio of 37:63) or high-RUP concentrate (HRUP; RUP ratio of 47:53), with a dietary crude protein (CP) content of 20% dry matter (DM) during the growing stage (8 to 17 months) and 18% DM during the fattening stage (18 to 26 months). Results Increasing the RUP ratio in the concentrate reduced (p = 0.062) rumen ammonia (NH3-N) levels during the growing stage. A decrease (p<0.05) in the molar proportions of acetate and valerate, and an increase (p = 0.097) in the proportions of iso-valerate, was observed in the HRUP group. Significant improvements (p<0.05) in the average daily gain and the feed conversion ratio were observed in the HRUP group during the fattening stage. Although there were no significant group differences in carcass yield or characteristics in steers slaughtered at 26 months, a trend (p = 0.081) toward an increased rib-eye area was observed in the HRUP group. Relative mRNA expression profiling revealed higher lipid biosynthesis and lipolysis in the HRUP group at slaughter. However, no effects on intramuscular fat content was detected. Conclusion Raising the RUP level improved performance and intramuscular fat metabolism in Hanwoo steers. The final body weight of the steers in the HRUP group was comparable to that of Hanwoo steers raised under the conventional 30-month fattening period. Overall, feeding a high-CP concentrate with a higher RUP proportion (47% CP) may be a beneficial strategy to shorten the feeding period. |
| format | Article |
| id | doaj-art-9355a7b011a54cd2b32355d83633295f |
| institution | OA Journals |
| issn | 2765-0189 2765-0235 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | Asian-Australasian Association of Animal Production Societies |
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| series | Animal Bioscience |
| spelling | doaj-art-9355a7b011a54cd2b32355d83633295f2025-08-20T02:28:19ZengAsian-Australasian Association of Animal Production SocietiesAnimal Bioscience2765-01892765-02352025-06-013861206121810.5713/ab.24.072825433Effects of high-protein concentrates with different rumen undegradable-to-degradable protein ratios on performance and carcass traits in 26-month-slaughtered Hanwoo steersWoo Hyeong Hong0Rajaraman Bharanidharan1Tae Hoon Kim2Jun Suk Byun3Geum Hwi Bang4Krishnaraj Thirugnanasambantham5Joonpyo Oh6Ridha Ibidhi7Sun Sik Jang8Kyoung Hoon Kim9 Department of International Agricultural Technology, Graduate School of International Agricultural Technology, Seoul National University, Pyeongchang, Korea Department of Eco-friendly Livestock Science, Institutes of Green Bio Science and Technology, Seoul National University, Pyeongchang, Korea Department of Geography, McGill University, Montreal, QC, Canada University of Maryland Center for Environmental Science, Frostburg, MD, USA Farmsco Co., Ltd., Anseong, Korea Department of Eco-friendly Livestock Science, Institutes of Green Bio Science and Technology, Seoul National University, Pyeongchang, Korea Cargill Animal Nutrition Korea, Seongnam, Korea INRAE, Institut Agro, Univ. Bourgogne Franche-Comté, Agroécologie, Dijon, France Hanwoo Research Institute, National Institute of Animal Science, Pyeongchang, Korea Department of International Agricultural Technology, Graduate School of International Agricultural Technology, Seoul National University, Pyeongchang, KoreaObjective This study investigated the effects of high-protein concentrates with two different rumen undegradable protein (RUP)-to-degradable protein ratios on the performance and carcass characteristics of Hanwoo steers reared for 26 months. Methods Thirty-two Hanwoo steers (217±13 kg) were randomly allocated to eight pens (four animals/pen) and assigned to one of two concentrate treatments (four pens/treatment), low-RUP concentrate (LRUP; RUP ratio of 37:63) or high-RUP concentrate (HRUP; RUP ratio of 47:53), with a dietary crude protein (CP) content of 20% dry matter (DM) during the growing stage (8 to 17 months) and 18% DM during the fattening stage (18 to 26 months). Results Increasing the RUP ratio in the concentrate reduced (p = 0.062) rumen ammonia (NH3-N) levels during the growing stage. A decrease (p<0.05) in the molar proportions of acetate and valerate, and an increase (p = 0.097) in the proportions of iso-valerate, was observed in the HRUP group. Significant improvements (p<0.05) in the average daily gain and the feed conversion ratio were observed in the HRUP group during the fattening stage. Although there were no significant group differences in carcass yield or characteristics in steers slaughtered at 26 months, a trend (p = 0.081) toward an increased rib-eye area was observed in the HRUP group. Relative mRNA expression profiling revealed higher lipid biosynthesis and lipolysis in the HRUP group at slaughter. However, no effects on intramuscular fat content was detected. Conclusion Raising the RUP level improved performance and intramuscular fat metabolism in Hanwoo steers. The final body weight of the steers in the HRUP group was comparable to that of Hanwoo steers raised under the conventional 30-month fattening period. Overall, feeding a high-CP concentrate with a higher RUP proportion (47% CP) may be a beneficial strategy to shorten the feeding period.http://www.animbiosci.org/upload/pdf/ab-24-0728.pdfdietary protein levelhanwoorumen undegradable proteinshortened fattening period |
| spellingShingle | Woo Hyeong Hong Rajaraman Bharanidharan Tae Hoon Kim Jun Suk Byun Geum Hwi Bang Krishnaraj Thirugnanasambantham Joonpyo Oh Ridha Ibidhi Sun Sik Jang Kyoung Hoon Kim Effects of high-protein concentrates with different rumen undegradable-to-degradable protein ratios on performance and carcass traits in 26-month-slaughtered Hanwoo steers Animal Bioscience dietary protein level hanwoo rumen undegradable protein shortened fattening period |
| title | Effects of high-protein concentrates with different rumen undegradable-to-degradable protein ratios on performance and carcass traits in 26-month-slaughtered Hanwoo steers |
| title_full | Effects of high-protein concentrates with different rumen undegradable-to-degradable protein ratios on performance and carcass traits in 26-month-slaughtered Hanwoo steers |
| title_fullStr | Effects of high-protein concentrates with different rumen undegradable-to-degradable protein ratios on performance and carcass traits in 26-month-slaughtered Hanwoo steers |
| title_full_unstemmed | Effects of high-protein concentrates with different rumen undegradable-to-degradable protein ratios on performance and carcass traits in 26-month-slaughtered Hanwoo steers |
| title_short | Effects of high-protein concentrates with different rumen undegradable-to-degradable protein ratios on performance and carcass traits in 26-month-slaughtered Hanwoo steers |
| title_sort | effects of high protein concentrates with different rumen undegradable to degradable protein ratios on performance and carcass traits in 26 month slaughtered hanwoo steers |
| topic | dietary protein level hanwoo rumen undegradable protein shortened fattening period |
| url | http://www.animbiosci.org/upload/pdf/ab-24-0728.pdf |
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