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논문 기본 정보

자료유형
학술저널
저자정보
Soohyung Lee (Kyungpook National University) Sangmoo Lee (Kyungpook National University) Jaehun Lee (Kyungpook National University) Eun Joong Kim (Kyungpook National University)
저널정보
한국축산학회(구 한국동물자원과학회) 한국축산학회지 한국축산학회지 제63권 제5호
발행연도
2021.9
수록면
1,086 - 1,097 (12page)
DOI
10.5187/jast.2021.e88

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This study examined the impact of using total mixed ration (TMR) and concentrate on feed intake, daily gain, carcass yield grade, and carcass quality grade of Hanwoo steers and its subsequent economic efficiency. Thirty six 7-month-old Hanwoo steers were assigned to one of the four treatment groups, and each group was divided into three repeated pens, with each repeated pen comprising three steers. The treatment groups were: 1) separate feeding with commercial concentrate and forage (namely, SCF) for the entire experimental period; 2) TMR feeding for a growing period followed by SCF for the early and late fattening period (namely, TMRGSCF); 3) TMR feeding for growing and an early fattening period followed by SCF for the late fattening period (namely, TMREFSCF); and 4) TMR feeding for the entire experimental period (namely, TMRW). The results showed that the SCF treatment had significantly (p < 0.05) higher feed intake during the growing period than other treatments. In contrast, the total feed intake had little difference during early and late fattening as well as the whole period regardless of feeding strategies. Daily gain showed no difference during the growing period. However, it was significantly higher in SCF and TMREFSCF treatments for the early and late fattening period, respectively (p < 0.05). The daily gain during the total raising period is in the order of TMREFSCF > TMRGSCF > SCF > TMRW. Carcass characteristics, including carcass weight, loin eye muscle area, and carcass yield grade, did not significantly differ among different treatments. However, TMRW treatment, wherein TMR was fed for a long time, showed that the cold carcass weight was less compared with other treatments, but carcass yield grade was higher with thinner backfat. Backfat thickness was in the order of SCF > TMRGSCF > TMREFSCF > TMRW, showing that the thickness reduced with longer TMR feeding (p < 0.05). TMRGSCF, which numerically had a higher carcass quality grade, showed higher economic efficiency, whereas SCF showed low economic efficiency. In conclusion, it was more feasible to apply TMR strategy in the growing and early fattening period and then SCF for the early or late fattening period to improve carcass yield, quality grade, and economic efficiency.
#Total mixed ration (TMR) #Hanwoo #Carcass quality #Feed intake #Profits

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참고문헌 (31)

참고문헌 신청
David J. Schingoethe / 2017 / A 100-Year Review: Total mixed ration feeding of dairy cows / Journal of Dairy Science 100(12):10143~10150 Crossref Y.F. Liu / 2016 / Effects of Three Feeding Systems on Production Performance, Rumen Fermentation and Rumen Digesta Particle Structure of Beef Cattle / Animal Bioscience 29(5):659~665 Crossref D. Moya / 2011 / Feeding behavior and ruminal acidosis in beef cattle offered a total mixed ration or dietary components separately / Journal of Animal Science 89(2):520~530 Crossref S.J. Lee / 2015 / Effect of Medicinal Plant By-products Supplementation to Total Mixed Ration on Growth Performance, Carcass Characteristics and Economic Efficacy in the Late Fattening Period of Hanwoo Steers / Animal Bioscience 28(12):1729~1735 Crossref D.Y.Li / 2003 / Effect of Feeding System on Rumen Fermentation Parameters and Nutrient Digestibility in Holstein Steers / Animal Bioscience 16(10):1482~1486 google schola

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