Effects of Physically Effective Neutral Detergent Fiber Content of TMR Feed on the Productivity and Carcass Characteristics in Hanwoo (Bos taurus coreanae) Steers
2015
Jeon, B.T., Konkuk University, Chungju, Republic of Korea | Park, J.H., Konkuk University, Chungju, Republic of Korea | Cho, W.M., Nation Institute of Animal Science, RDA, Suwon, Republic of Korea | Kim, S.W., Nation Institute of Animal Science, RDA, Suwon, Republic of Korea | Jang, S.Y., Konkuk University, Chungju, Republic of Korea | Moon, S.H., Konkuk University, Chungju, Republic of Korea
This study was carried out to evaluate accurately physical characteristics of total mixed rations (TMR) by investigating the effects of physically effective neutral detergent fiber content on the growth performance and carcass characteristics in fattening steers. Twelve Hanwoo (Bos Taurus coreanae) steers aged 26 months were used in this trial. Steers were offered one of two total mixed ration (TMR) diets - High or Low physically effective neutral detergent fiber (peNDF) content groups that were differentiated by mixing time. The carcass traits of the experimental animals were evaluated by Korea Institute for Animal Products Quality Evaluation (KAPE) after slaughter. Body weight gain during the experimental period was significantly higher (P0.05) in the High group (30.00 + -10.27 kg) compared with the Low group (17.20 + - 6.34 kg), and daily weight gain was also high in the former. Although there was no significant difference, the carcass weight was higher in the High group (414.60 + - 34.28 kg) compared with the Low group (377.80 + - 11.97 kg). However, the beef quality grade of the Low group (1++) was higher than that of the High group (1+). Increases in body weight gain, daily gain, and carcass weight for the High group were mainly influenced by a high level of dry matter (DM) intake and digestibility; consequently, back-fat thickness increased and the beef quality grade was lowered. Because growth performance and carcass characteristics were affected by the physical traits of the diet, we suggested that proper peNDF content is also needed for fattening steers.
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