Effects of dietary rumen undegradable protein:rumen degradable protein ratio on nitrogen metabolism in Hanwoo steers
Objective We investigated the effects of dietary rumen undegradable protein (RUP): rumen degradable protein (RDP) ratio on growth performance, nitrogen (N) metabolism, and rumen and blood parameters in Hanwoo (Korean cattle) steers. Methods Eight Hanwoo steers (average body weight, 393 kg) were allo...
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| Format: | Article |
| Language: | English |
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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-24-0592.pdf |
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| author | Sang Yeob Kim Rajaraman Bharanidharan Seyun Im Kyoung Hoon Kim Joonpyo Oh Hyun Jin Kim Jaesung Lee Kamburawala Kankanamge Tharindu Namal Ranaweera Jin Woo Jeong Jun Seok Oh Sang Hyun Lee Myunggi Baik |
| author_facet | Sang Yeob Kim Rajaraman Bharanidharan Seyun Im Kyoung Hoon Kim Joonpyo Oh Hyun Jin Kim Jaesung Lee Kamburawala Kankanamge Tharindu Namal Ranaweera Jin Woo Jeong Jun Seok Oh Sang Hyun Lee Myunggi Baik |
| author_sort | Sang Yeob Kim |
| collection | DOAJ |
| description | Objective We investigated the effects of dietary rumen undegradable protein (RUP): rumen degradable protein (RDP) ratio on growth performance, nitrogen (N) metabolism, and rumen and blood parameters in Hanwoo (Korean cattle) steers. Methods Eight Hanwoo steers (average body weight, 393 kg) were allocated to two groups and fed with a high RUP:RDP ratio (46.9:53.1 based on crude protein) or a low RUP:RDP ratio (30.6:69.4) concentrate with iso-crude protein content in a 2×2 Latin square design in two successive periods. Results The high RUP:RDP group had higher (p<0.01) average daily gain, and lower (p<0.05) ruminal ammonia and plasma urea N concentrations than the low RUP:RDP group. The high RUP:RDP group had lower (p<0.05) urinary N excretion and urinary N per N intake and higher (p<0.1) tendency of retained N than the low RUP:RDP group. The high RUP:RDP group had higher (p<0.1) tendency of N utilization efficiency (retained N per N intake: 28.7% vs. 25.5%) than the low RUP:RDP group. The high RUP:RDP group had a lower (p<0.1) tendency of urinary N per total N excretion, but a higher tendency of fecal N per total N excretion. Conclusion A high ratio of dietary RUP:RDP may improve N utilization efficiency by reducing urinary N excretion, which may be beneficial for the environment through reducing atmospheric ammonia emissions. |
| format | Article |
| id | doaj-art-86c80b927bf14efeae8e39ac6c4e7d00 |
| institution | Kabale University |
| issn | 2765-0189 2765-0235 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | Asian-Australasian Association of Animal Production Societies |
| record_format | Article |
| series | Animal Bioscience |
| spelling | doaj-art-86c80b927bf14efeae8e39ac6c4e7d002025-08-20T03:48:57ZengAsian-Australasian Association of Animal Production SocietiesAnimal Bioscience2765-01892765-02352025-06-013861182119310.5713/ab.24.059225418Effects of dietary rumen undegradable protein:rumen degradable protein ratio on nitrogen metabolism in Hanwoo steersSang Yeob Kim0Rajaraman Bharanidharan1Seyun Im2Kyoung Hoon Kim3Joonpyo Oh4Hyun Jin Kim5Jaesung Lee6Kamburawala Kankanamge Tharindu Namal Ranaweera7Jin Woo Jeong8Jun Seok Oh9Sang Hyun Lee10Myunggi Baik11 Department of Agricultural Biotechnology and Research Institute of Agriculture and Life Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul, Korea Department of Eco-friendly Livestock Science, Institute of Green Bio Science and Technology, Seoul National University, Pyeongchang, Korea Department of Agricultural Biotechnology and Research Institute of Agriculture and Life Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul, Korea Department of Eco-friendly Livestock Science, Institute of Green Bio Science and Technology, Seoul National University, Pyeongchang, Korea Cargill Animal Nutrition Korea, Seongnam, Korea Department of Agricultural Biotechnology and Research Institute of Agriculture and Life Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul, Korea Department of Agricultural Biotechnology and Research Institute of Agriculture and Life Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul, Korea Department of Agricultural Biotechnology and Research Institute of Agriculture and Life Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul, Korea Department of Agricultural Biotechnology and Research Institute of Agriculture and Life Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul, Korea Department of Agricultural Biotechnology and Research Institute of Agriculture and Life Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul, Korea Department of Agricultural Biotechnology and Research Institute of Agriculture and Life Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul, Korea Department of Agricultural Biotechnology and Research Institute of Agriculture and Life Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul, KoreaObjective We investigated the effects of dietary rumen undegradable protein (RUP): rumen degradable protein (RDP) ratio on growth performance, nitrogen (N) metabolism, and rumen and blood parameters in Hanwoo (Korean cattle) steers. Methods Eight Hanwoo steers (average body weight, 393 kg) were allocated to two groups and fed with a high RUP:RDP ratio (46.9:53.1 based on crude protein) or a low RUP:RDP ratio (30.6:69.4) concentrate with iso-crude protein content in a 2×2 Latin square design in two successive periods. Results The high RUP:RDP group had higher (p<0.01) average daily gain, and lower (p<0.05) ruminal ammonia and plasma urea N concentrations than the low RUP:RDP group. The high RUP:RDP group had lower (p<0.05) urinary N excretion and urinary N per N intake and higher (p<0.1) tendency of retained N than the low RUP:RDP group. The high RUP:RDP group had higher (p<0.1) tendency of N utilization efficiency (retained N per N intake: 28.7% vs. 25.5%) than the low RUP:RDP group. The high RUP:RDP group had a lower (p<0.1) tendency of urinary N per total N excretion, but a higher tendency of fecal N per total N excretion. Conclusion A high ratio of dietary RUP:RDP may improve N utilization efficiency by reducing urinary N excretion, which may be beneficial for the environment through reducing atmospheric ammonia emissions.http://www.animbiosci.org/upload/pdf/ab-24-0592.pdfdietary rumen undegradable proteinfermented heat-treated soybean mealkorean cattle steersnitrogen excretionretained nitrogen |
| spellingShingle | Sang Yeob Kim Rajaraman Bharanidharan Seyun Im Kyoung Hoon Kim Joonpyo Oh Hyun Jin Kim Jaesung Lee Kamburawala Kankanamge Tharindu Namal Ranaweera Jin Woo Jeong Jun Seok Oh Sang Hyun Lee Myunggi Baik Effects of dietary rumen undegradable protein:rumen degradable protein ratio on nitrogen metabolism in Hanwoo steers Animal Bioscience dietary rumen undegradable protein fermented heat-treated soybean meal korean cattle steers nitrogen excretion retained nitrogen |
| title | Effects of dietary rumen undegradable protein:rumen degradable protein ratio on nitrogen metabolism in Hanwoo steers |
| title_full | Effects of dietary rumen undegradable protein:rumen degradable protein ratio on nitrogen metabolism in Hanwoo steers |
| title_fullStr | Effects of dietary rumen undegradable protein:rumen degradable protein ratio on nitrogen metabolism in Hanwoo steers |
| title_full_unstemmed | Effects of dietary rumen undegradable protein:rumen degradable protein ratio on nitrogen metabolism in Hanwoo steers |
| title_short | Effects of dietary rumen undegradable protein:rumen degradable protein ratio on nitrogen metabolism in Hanwoo steers |
| title_sort | effects of dietary rumen undegradable protein rumen degradable protein ratio on nitrogen metabolism in hanwoo steers |
| topic | dietary rumen undegradable protein fermented heat-treated soybean meal korean cattle steers nitrogen excretion retained nitrogen |
| url | http://www.animbiosci.org/upload/pdf/ab-24-0592.pdf |
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