Fifteen Hanwoo steers aged about 6 months and weighing about 180kg were randomly allotted into one of three levels(40-11%, 45-13% and 50-15%) of roughage from growing period to investigate the effects of levels of roughage on body gain, carcass grade, blood components and economic analysis of Hanwoo steers. These levels of roughage were manipulated at an interval of 50kg body weight untill body weight reached about 600kg.
Steers fed 40-11% or 45-13% roughage did not differ in daily body gain but steers fed 50-15% roughage were significantly(p$lt;0.05) lower in daily body gain than steers fed 40-11% or 45-13% roughage. However, the ribeye area, marbling score, backfat thickness, beef color and fat color were not affected by the levels of roughage. Beef grade tended to improve with increasing levels of roughage in the ration. Blood components such as triglyceride and cholesterol were not affected by the levels of roughage. Steers offered 45-13% roughage during the growing period were the most profitable in economical analysis.
Therefore, according to this study it can be concluded that feeding 45-13% roughage from the growing period to finishing period is desirable for Hanwoo steers which will be fattened untill they reach 600kg body weight.
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