Effects of Dietary formulated feed Additive on Growth Performance and Carcass Traits in Hanwoo Steers
2016
Ryu, C., Chonbuk National University, Jeonju, Republic of Korea | Park, H.R., FACT, Iksan, Republic of Korea | Cho, S., Chonbuk National University, Jeonju, Republic of Korea | Choi, N.J., Chonbuk National University, Jeonju, Republic of Korea
The present study was conducted to evaluate the effects of dietary formulated feed additive on growth performance and carcass traits of Hanwoo steers. A formulated feed additive reported to reduce heat load in the rumen in our previous research was used (Cho et al., 2014). Total 32 herds of Hanwoo steers were assigned into two groups of control and treatment. Total mixed ration was provided as basal diet for cattle and 100 g of additive was supplemented on diet for treatment. Feeding trial was performed during 120 days before slaughter. For growth performance, 3 periods (0~90 days; 90~120 days; 0~120 days) were allotted and average daily gain, feed requirement and final body weight were determined. Loin meat between 12th and 13th rib was used for meat quality analysis after slaughtering. Only 1st period showed significantly improved growth performance of treatment (P less than 0.05) and there were no significant difference in other periods. At 3rd periods (overall), a trend of increased average daily gain was found at treatment (P=0.075). Carcass performance and quality did not show significant differences between treatment and control (P greater than 0.05). In meat quality, treatment showed significant increment in all measured meat colors (P less than 0.05) and significantly less sharing force compared to the control (P less than 0.05). Although no significant difference in growth performance and carcass yield were found, remarkably improved economic status was detected in treatment group. In conclusion, it could be suggested that application of a formulated feed additive specialized in reduction of heat load in the rumen was able to increase economical balance through enhancing heat stress condition of ruminant and growth.
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