Effects of forage level and chromium-methionine chelate supplementation on performance, carcass characteristics and blood metabolites in Korean native (Hanwoo) steers
2015
Sung, K.I., Kangwon National University, Chuncheon, Republic of Korea | Nejad, J.G., Kangwon National University, Chuncheon, Republic of Korea | Hong, S.M., Kangwon National University, Chuncheon, Republic of Korea | Ohh, S.J., Kangwon National University, Chuncheon, Republic of Korea | Lee, B.H., Kangwon National University, Chuncheon, Republic of Korea | Peng, J.L., Kangwon National University, Chuncheon, Republic of Korea | Ji, D.H., Kangwon National University, Chuncheon, Republic of Korea | Kim, B.W., Kangwon National University, Chuncheon, Republic of Korea
A feeding trial was carried out to determine the effects of chromium methionine (Cr-Met) chelate and forage level over two years, 1st fattening and 2nd fattening period on growth parameters, carcass characteristics and blood metabolites of 46 Korean native (Hanwoo, Bos Taurus, BW = 183 +- 44 kg) steers. Treatments were: 1) Steers in the low forage (LF) group were fed diets that consisted of 60% concentrate and 40% forage; 2) Steers in the high forage (HF) group were fed diets that consisted of 40% concentrate and 60% forage. Following the 1st fattening period, steers (BW = 480 +- 37.6 kg) were randomly assigned to four treatment groups: LF (40 F plus no Cr-Met supplementation in the 2nd fattening period), LFCM (40LF plus added 400 ppb of Cr-Met during the 2nd fattening period), HF (60 F plus no added Cr-Met during the 2nd fattening period) and HFCM (60 F plus added 400 ppb of Cr-Met in the 2nd fattening period). Dry matter intake of the treatment diets did not differ during the raising and 1th fattening period (P 0.05). The ADG in the raising period showed no difference between the 40 F and 60 F groups (P 0.05). Carcass characteristics including rib-eye area and meat yield index were higher in HF than the other treatment groups (P 0.05). The HF group tended to show a higher (P 0.05). The Insulin concentration in the blood was significantly higher for the HFCM group than for the LF, LFCM and HF groups (P 0.05). It is concluded that supplementation of chromium-methionine chelate could improve meat quality in beef steers.
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