Effect of crude protein content and undegraded intake protein level on productivity, blood metabolites, carcass characteristics, and production economics of Hanwoo steers
Objective This study was designed to determine how feeding diets differing in crude protein (CP) and undegraded intake protein (UIP) levels affected productivity, blood metabolites, carcass characteristics, and the production economics of Hanwoo steers. Methods Thirty-six Hanwoo steers (age = 8.2±0....
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| Format: | Article |
| Language: | English |
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Asian-Australasian Association of Animal Production Societies
2020-10-01
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| Series: | Asian-Australasian Journal of Animal Sciences |
| Subjects: | |
| Online Access: | http://www.ajas.info/upload/pdf/ajas-19-0822.pdf |
| _version_ | 1828554470094536704 |
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| author | Youn Hee Lee Farhad Ahmadi Myun Lee Young-Kyoon Oh Wan Sup Kwak |
| author_facet | Youn Hee Lee Farhad Ahmadi Myun Lee Young-Kyoon Oh Wan Sup Kwak |
| author_sort | Youn Hee Lee |
| collection | DOAJ |
| description | Objective This study was designed to determine how feeding diets differing in crude protein (CP) and undegraded intake protein (UIP) levels affected productivity, blood metabolites, carcass characteristics, and the production economics of Hanwoo steers. Methods Thirty-six Hanwoo steers (age = 8.2±0.5 mo; body weight = 254±16.1 kg) were assigned at random to one of three treatments (4 steers/pen; 3 pens/treatment): i) a low-CP diet (LP; control) containing 12.1% CP with 35.1% UIP, 12.0% CP with 36.8% UIP, and 12.9% CP with 48.8% UIP, in the growing, fattening, and finishing periods, respectively; ii) a high-CP, low-UIP diet (HPLU) containing 15.0% CP with 33.7% UIP, 14.0% CP with 35.7% UIP, and 13.1% CP with 46.7% UIP, respectively; and iii) a high-CP, high-UIP diet (HPHU) containing 15.0% CP with 45.8% UIP, 14.0% CP with 44.6% UIP, and 13.0% CP with 51.1% UIP, respectively. Results The treatments did not affect feed intake and growth performance, except for average daily gain during the fattening period that tended to be the lowest (p = 0.08) in the HPLU-fed steers. The feed CP conversion ratio over the entire feeding period was higher with high-CP diets. The treatments did not affect most blood metabolites; however, blood cholesterol and low-density lipoprotein concentrations during the fattening and finishing periods were the lowest in steers fed a HPLU diet. The treatments had negligible effects on cold carcass weight, yield traits including longissimus muscle area, backfat thickness, yield index, and yield grade, plus quality traits including meat color, fat color, texture, and maturity. However, marbling score and frequency of carcass quality grade 1++ were greater in HPHU-fed steers. Conclusion Feeding diets with higher CP and UIP levels did not affect growth performance but tended to improve the carcass quality of Hanwoo steers, resulting in greater economic return. |
| first_indexed | 2024-12-12T05:36:24Z |
| format | Article |
| id | doaj.art-0e7cb845a3cf4a73804c224d54e11d7d |
| institution | Directory Open Access Journal |
| issn | 1011-2367 1976-5517 |
| language | English |
| last_indexed | 2024-12-12T05:36:24Z |
| publishDate | 2020-10-01 |
| publisher | Asian-Australasian Association of Animal Production Societies |
| record_format | Article |
| series | Asian-Australasian Journal of Animal Sciences |
| spelling | doaj.art-0e7cb845a3cf4a73804c224d54e11d7d2022-12-22T00:36:06ZengAsian-Australasian Association of Animal Production SocietiesAsian-Australasian Journal of Animal Sciences1011-23671976-55172020-10-0133101599160910.5713/ajas.19.082224471Effect of crude protein content and undegraded intake protein level on productivity, blood metabolites, carcass characteristics, and production economics of Hanwoo steersYoun Hee Lee0Farhad Ahmadi1Myun Lee2Young-Kyoon Oh3Wan Sup Kwak4 Department of Food Bio-science, College of Medical Life Sciences, Konkuk University, Chungju 27478, Korea Department of Food Bio-science, College of Medical Life Sciences, Konkuk University, Chungju 27478, Korea Department of Food Bio-science, College of Medical Life Sciences, Konkuk University, Chungju 27478, Korea Animal Nutrition & Physiology Team, National Institute of Animal Science, Rural Development Administration, Wanju 55365, Korea Department of Food Bio-science, College of Medical Life Sciences, Konkuk University, Chungju 27478, KoreaObjective This study was designed to determine how feeding diets differing in crude protein (CP) and undegraded intake protein (UIP) levels affected productivity, blood metabolites, carcass characteristics, and the production economics of Hanwoo steers. Methods Thirty-six Hanwoo steers (age = 8.2±0.5 mo; body weight = 254±16.1 kg) were assigned at random to one of three treatments (4 steers/pen; 3 pens/treatment): i) a low-CP diet (LP; control) containing 12.1% CP with 35.1% UIP, 12.0% CP with 36.8% UIP, and 12.9% CP with 48.8% UIP, in the growing, fattening, and finishing periods, respectively; ii) a high-CP, low-UIP diet (HPLU) containing 15.0% CP with 33.7% UIP, 14.0% CP with 35.7% UIP, and 13.1% CP with 46.7% UIP, respectively; and iii) a high-CP, high-UIP diet (HPHU) containing 15.0% CP with 45.8% UIP, 14.0% CP with 44.6% UIP, and 13.0% CP with 51.1% UIP, respectively. Results The treatments did not affect feed intake and growth performance, except for average daily gain during the fattening period that tended to be the lowest (p = 0.08) in the HPLU-fed steers. The feed CP conversion ratio over the entire feeding period was higher with high-CP diets. The treatments did not affect most blood metabolites; however, blood cholesterol and low-density lipoprotein concentrations during the fattening and finishing periods were the lowest in steers fed a HPLU diet. The treatments had negligible effects on cold carcass weight, yield traits including longissimus muscle area, backfat thickness, yield index, and yield grade, plus quality traits including meat color, fat color, texture, and maturity. However, marbling score and frequency of carcass quality grade 1++ were greater in HPHU-fed steers. Conclusion Feeding diets with higher CP and UIP levels did not affect growth performance but tended to improve the carcass quality of Hanwoo steers, resulting in greater economic return.http://www.ajas.info/upload/pdf/ajas-19-0822.pdfcarcass qualitycrude proteinhanwoomarblingundegraded intake protein |
| spellingShingle | Youn Hee Lee Farhad Ahmadi Myun Lee Young-Kyoon Oh Wan Sup Kwak Effect of crude protein content and undegraded intake protein level on productivity, blood metabolites, carcass characteristics, and production economics of Hanwoo steers Asian-Australasian Journal of Animal Sciences carcass quality crude protein hanwoo marbling undegraded intake protein |
| title | Effect of crude protein content and undegraded intake protein level on productivity, blood metabolites, carcass characteristics, and production economics of Hanwoo steers |
| title_full | Effect of crude protein content and undegraded intake protein level on productivity, blood metabolites, carcass characteristics, and production economics of Hanwoo steers |
| title_fullStr | Effect of crude protein content and undegraded intake protein level on productivity, blood metabolites, carcass characteristics, and production economics of Hanwoo steers |
| title_full_unstemmed | Effect of crude protein content and undegraded intake protein level on productivity, blood metabolites, carcass characteristics, and production economics of Hanwoo steers |
| title_short | Effect of crude protein content and undegraded intake protein level on productivity, blood metabolites, carcass characteristics, and production economics of Hanwoo steers |
| title_sort | effect of crude protein content and undegraded intake protein level on productivity blood metabolites carcass characteristics and production economics of hanwoo steers |
| topic | carcass quality crude protein hanwoo marbling undegraded intake protein |
| url | http://www.ajas.info/upload/pdf/ajas-19-0822.pdf |
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