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http://dx.doi.org/10.5333/KGFS.2019.39.4.250

Effect of Mountain Grazing on Growth Performance and Carcass Characteristics of Hanwoo Steers  

Lee, Eun Mee (Hanwoo Research Institute, National Institute of Animal Science)
Chung, Ki Yong (Korea National College of Agriculture and Fisheries)
Kim, Ui-Hyung (Hanwoo Research Institute, National Institute of Animal Science)
Ahn, Jun Sang (Hanwoo Research Institute, National Institute of Animal Science)
Park, Bo Hye (Hanwoo Research Institute, National Institute of Animal Science)
Kang, Dong Hun (Hanwoo Research Institute, National Institute of Animal Science)
Jang, Sun Sik (Hanwoo Research Institute, National Institute of Animal Science)
Publication Information
Journal of The Korean Society of Grassland and Forage Science / v.39, no.4, 2019 , pp. 250-257 More about this Journal
Abstract
This study was carried out to investigate the effect of mountain grazing on growth performance and carcass characteristics of Hanwoo steers. Thirty two Hanwoo steers were randomly assigned. Control were fed concentrate + forage until 30 month of age. Treatment1 were fed concentrate + forage after mountain grazing from 8 to 13 months. Treatment2 and 3 were fed concentrate + forage after mountain grazing from 8 to 17 months. Hanwoo steers on Treatment 1 and 2 were slaughtered at the same age (30 months) as the control, and Hanwoo steers on Treatment 3 were slaughtered at 31 months. The average daily gain (ADG) were higher in the control than in the other treatments during the growing period (p<0.05). Carcass back fat thickness was thicker in the TRT 3 and marbling score was higher in the TRT 1 than in the other treatments; however, the differences were not statistically significant. There was no difference in the meat composition and shear force of the longissimus muscle according to the mountain grazing. However, the yellowness (b) of fat colors were significantly lower in the control than in the TRT 1 and TRT 2 (p<0.05). The effect of grazing on fatty acid composition was not constant. In conclusion, mountain grazing could reduce meat color without affecting the growth and meat quality of Hanwoo steers, and further research on the quality, yield and intake of grassland would be needed.
Keywords
Hanwoo steers; Mountain grazing; Growth performance; Carcass characteristics;
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