The Effects of Total Mixed Ration Feeding with High Roughage Contenton Growth Performance Carcass Characteristics and Meat Quality of HanwooSteers

摘要

This study investigated the dietary effect of total mixed ration (TMR) based onhigh roughage content on the growth performance, carcass characteristics, andmeat quality of Hanwoo steers. Twenty-four Hanwoo steers (average body weight,195.3±4.7 kg; age, 8.5 mon) were randomly allocated to three experimentalgroups according to forage and concentrate ratio (DM basis): 25:75 (control),50:50 (T50), and 70:30 (T70). Productivity in thefattening period and final body weight were significantly higher in the control.Average daily gain and feed conversion ratio were the same among treatments.Serum parameters, cholesterol, blood urea nitrogen, and total protein werehigher in the control. Carcass weight was comparable in the control andT50 but feeding more roughage was significantly correlated with ahigher intramuscular fat. Shear strength and drip loss were higher while n-6-3was lower in T70 compared to the other groups. However, meat colorwas not significantly different among treatments. In terms of free amino acidcontents, glutamic acid and glycine were higher in the control thanT50 and T70. Overall, feeding Hanwoo steers with highforage content TMR had the lowest n-6-3 ratio of fatty acid content buthighest intramuscular fat, shear strength, and drip loss. High forage contentTMR is the best feed for Hanwoo steers that gives more benefits for human healthand consumption but also provides the best meat grade and quality, which isimportant in the beef market in Korea.