This study was conducted to investigate the effect of feeding or garlic stalk silage on performance and carcass characteristics of Hanwoo steers. Feeding trial was conducted with 27 heads of Hanwoo steers and these animals were divided into two groups control(rice straw) and garlic stalk silage. Animasl consuming rice straw were fed concentrates and rice straw for 22 months from the 5 months of age and animals consuming garlic stalk silage were fed concentrates, rice straw and garlic stalk silage for 22 months from the 5 months of age.
Animals fed rice straw and garlic stalk silage were fed 1.34 and 1.47, 1.69 and 1.74, 1.65 and 1.66％ concentrates to body weight for the growing period, fattening period and finishing period, respectively. Also, animals fed garlic stalk silage wee offered 0.22 and 0.33％ garlic stalk silage to body weight for the fattening and finishing period, respectively.
Animals fed rice straw and garlic stalk silage as a roughage sources did not differ in average daily gain during the whole feeding periods. Animals of control group consumed less concentrates and roughage than those fed garlic stalk silage during the whole feeding periods. However, feed efficiency was not significantly different between both treatments.
Beef yield including backfat thickness, eye muscle area and carcass weight was slightly lower in the animals fed garlic stalk silage than in the animals fed rice straw even though there were no differences between both treatments. However, beef quality including beef color, fat color, texture, maturity and marbling score was slightly higher in the garlic stalk silage-fed animals than in the animals fed rice straw although there were not statistically different between both treatments.
Animals consuming garlic stalk silage was significantly(p＜0.05) lower in shear value than those fed rice straw. Amino acid composition including essential amino acid non-essential amino acid was not different between animals fed rice straw and garlic stalk silage.
Eye muscle area of animals fed garlic stalk silage contained slightly higher oleic aced, less linoleic acid and arachidonic acid more linolenic acid than that of animals fed rice straw only as a roughage sources. So eye muscle area of animals fed garlic stalk silage contained more mono-unsaturated fatty acid than that of animals fed rice straw and ω6／ω3 ratio was narrower in the animals fed garlic stalk silage than in the animals fed rice straw. Economic income was higher by 20％ in the animals fed garlic stalk silage than in the animals fed rice straw.
Therefore, It may be concluded that feeding of garlic stalk silage as a roughage sources to steers during the fattening period seems to improve meat quality, fatty acid composition and economic income.
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