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Effect of dietary garlic bulb and husk on the physicochemical properties of chicken meat

Y. J. Kim^*, S. K. Jin and H. S. Yang^,1

^* Division of Life Resources, Daegu University, Jilyang, Kyungsan, Kyungbuk, 712-714, Korea; Department of Animal Resources Technology, Jinju National University, Jinju, Gyeongnam 660-758, Korea; and Department of Animal Science, Gyeongsang National University, Jinju, Gyeongnam 660-701, Korea

¹ Corresponding author: didgkstnf{at}hotmail.com

This study was carried out to compare the physicochemical and sensory properties of chicken thigh muscles from broilers fed different levels of garlic bulb (GB) and garlic husk (GH). Two hundred male Arbor Acre broiler chickens were fed either a control diet (based on corn and soybean meal) or the control diet supplemented with 2 and 4% of GB and GH powder for 5 wk. There were no differences among diets in moisture and ash contents. However, dietary supplementation with GB and GH resulted in significantly greater protein content and lower fat content in chicken thigh muscle compared with muscle from birds fed nonsupplemented diets (P < 0.05). Increasing the level of garlic supplementation resulted in lower shear force and thiobarbituric acid reactive substances values (P < 0.05). Dietary supplementation with garlic led to decreased total and low-density lipoprotein cholesterol levels in broiler blood, and the greatest level of garlic supplementation decreased saturated fatty acid and increased unsaturated fatty acid levels (%) in broiler thigh muscle (P < 0.05). Sensory panelists recorded greater hardness and flavor scores to the samples with garlic dietary supplementation (P < 0.05). These data suggest that supplementing broiler chicken diets with garlic can produce chicken meat with favorable lipid profiles and can enhance eating quality because sensory panels found that thigh meat from chickens fed a garlic-supplemented diet had better texture and flavor. Therefore, the treatment with the most significant effects in this study was that with the high level of garlic husk.

Key Words: garlic bulb • garlic husk • broiler chicken • cholesterol • quality characteristics