Effects of Forage Source and Shipping Time on Growth Performance and Carcass Characteristics of Hanwoo Steers
2009
Cho, W.M., National Institute of Animal Science, RDA, Cheonan, Republic of Korea | Chang, S.S., National Institute of Animal Science, RDA, Cheonan, Republic of Korea | Cho, Y.M., National Institute of Animal Science, RDA, Cheonan, Republic of Korea | Kim, H.C., National Institute of Animal Science, RDA, Cheonan, Republic of Korea | Kwon, E.G., National Institute of Animal Science, RDA, Cheonan, Republic of Korea | Yang, S.H., National Institute of Animal Science, RDA, Cheonan, Republic of Korea | Paek, B.H., National Institute of Animal Science, RDA, Cheonan, Republic of Korea
This study examined the influence of forage source (grass hay and rice straw) and shipping time (24, 26, 28 and 30 months) on feed conversion ratio, growth performance and carcass characteristics of Hanwoo steers. Sixty four Hanwoo steers at 6 months age were fed either grass hay (n=32) or rice straw (n=32) for 24, 26, 28 and 30 months of age. Steers fed on mixed grass hay gained significantly higher body weight at 24, 26, 28 and 30 months compared with those fed on rice straw. Feed efficiency was slightly better in steers fed mixed grass hay compared to those fed rice straw. Back fat thickness and marbling score were increased with the age of steers (p less than 0.05). Carcass quality traits (meat color, fat color, texture and maturity) were not affected by forage source and shipping time. Shear force, cooking loss and water holding capacity of beef were reduced with advancing age of steers (p less than 0.05). Moisture content was lower and fat content was higher in beef produced from steers fed mixed grass hay than those fed rice straw (p less than 0.05). Beef juiciness was reduced with the advancing shipping time of steers. In conclusion, it would be beneficial to feed hay compared with rice straw during whole period of Hanwoo steer to produce high quality beef.
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