Comparison of Growth Performances and Physico-chemical Characteristics of Hanwoo Bulls and Steers of Different Slaughtering Ages

Title
Comparison of Growth Performances and Physico-chemical Characteristics of Hanwoo Bulls and Steers of Different Slaughtering Ages
Author(s)
최창본김병기[김병기]정대진[정대진]이지홍[이지홍]황은경[황은경]
Keywords
BEEF; FEED; TENDERNESS; MUSCLES; TIME; PALATABILITY; QUALITY; TISSUES; REGIME
Issue Date
201104
Publisher
KOREAN SOC FOOD SCIENCE ANIMAL RESOURCES
Citation
KOREAN JOURNAL FOR FOOD SCIENCE OF ANIMAL RESOURCES, v.31, no.2, pp.257 - 265
Abstract
The current study was conducted to compare the growth performance and physico-chemical characteristics of Hanwoo bulls and steers of different slaughtering ages. Thirty-six Hanwoo (average age, 13-mon) were allocated into either a bull or steer group (18 animals/group). Each group was sub-divided into 26-, 28-, and 30-mon-old age groups (six animals/group). Surgical castration was performed in the steer group immediately after the experimental groups were assigned. Growth performance of the animals, as well as carcass characteristics and fatty acid composition of M longissimus dorsi were determined. Cold carcass weights increased as carcass slaughtering age increased in both Hanwoo bulls and steers (p < 0.05). Backfat thickness was thickest (p < 0.05) in 28-mon-old Hanwoo bulls and 30-mon-old steer, and the M longissimus dorsi area was widest (p < 0.05) in 28-mon-old Hanwoo bulls and steers. Marbling score, cooking loss, and water holding capacity (WHC) were higher (p < 0.05) in 30-mon-old Hanwoo bulls and steers as slaughtering age increased. The shear force value was highest in 30-mon-old Hanwoo bulls and 26-mon-old Hanwoo steers compared to that in other groups. The unsaturated fatty acid composition in M. longissimus dorsi was significantly (p < 0.05) higher in 28- and 30-mon-old Hanwoo bulls and steers than that in other groups. The results suggest that castration, even at late stages of Hanwoo development, improved beef carcass quality grade, and that no difference in beef quality grade had occurred (marbling score and WHC) in 28- and 30-mon-old slaughtering age Hanwoo steers.
URI
http://hdl.handle.net/YU.REPOSITORY/25348
ISSN
1225-8563
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생명공학부 > 생명공학부 > Articles
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