Effects of different physical forms of concentrate on performance, carcass characteristics, and economic analysis in hanwoo steers.
This study was performed to investigate the effects of different forms of concentrate fed to Hanwoo steers on performance, carcass characteristics, and economic performance. Forty-two Hanwoo steers (average age of 5.1 ± 0.8 mo. with body weight of 147.05 ± 10.85 kg) were randomly allotted into FC (animals fed flakes for entire experimental period) and GC (animals fed grounded concentrate during growing and fattening phases followed by flaked concentrate during finishing phase) groups for 758 d after reaching an age of 30.0 ± 0.82 mo. There was no difference in body weight (BW) or ADG between the treatments until fattening (15 ~ 22 mo.) phase. However, by finishing phase (23 ~ 30 mo.), the GC group (739.24 kg BW and 0.67 kg ADG) showed greater (P < 0.05) BW and ADG than the FC group (702.93 kg BW and 0.59 kg ADG). Steers in the GC group also showed greater (P < 0.05) BW and ADG than the FC group throughout the entire experimental period (5 ~ 30 mo.). There was no significant difference in carcass weight or backfat thickness between the treatments. M. Longissimus dorsi area of the GC group (91.00 cm(2)cm(2)) was greater (P < 0.05) than that of the FC group (83.59 cm(2)). Marbling score and percentage of 1(++) meat quality grade were 14.0 and 48.0% higher in the GC group compared to the FC group. There was no significant difference in physicochemical characteristics, including moisture and crude protein levels, between the treatments. Gross income per head excluding operating expenses was 59.3% greater in the GC group (1,647,512 won) compared to the FC group (1,034,343 won).
Department of Animal Science, Gyeonbuk Provincial College, Yecheong-eup, 757-807 Korea.
Sung Il
SI
Kim
Gyeongnam National University of Science and Technolony, Jinju, 757-803 Korea.
Bo Cheon
BC
Seo
Gyeongnam National University of Science and Technolony, Jinju, 757-803 Korea.
In Surk
IS
Jang
Department of Animal Science, Dong-A University, Busan, 602-714 Korea.
Ouk
O
Kim
Department of Biotechnolony, Yeungnam University, Gyeongsan, 712-749 Korea.
Chang Bon
CB
Choi
Moksan Hanwoo Reserch Institute, 108-7, Bujeok-ri, Apryang-myun, Gyeongsan, Gyeongsangbuk-do, 712-821 Korea.
Keun Ki
KK
Jung
Economic performance; Flaked concentrate; Grounded concentrate; Hanwoo steers