Distiller's dried grains with solubles의 급여가 거세한우의 비육성적, 도체특성 및 지방산 조성에 미치는 영향
Effects of Supplementary of Distiller's dried grains with solubles in the Diets on Performances, Carcass Characteristics and Composition of Fatty acid in Hanwoo steers
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본 연구는 DDGS의 첨가가 거세한우의 비육성적, 도체특성 및 지방산조성에 미치는 영향을 조사하기 위해서 실시되었다. 평균 28.2개월령 (평균 체중 747.1±62.8㎏)의 거세한우 44두를 대조구, 시험1구 (DDGS 15% 첨가구) 및 시험2구 (DDGS 30% 첨가구)에 각각 15, 14 및 15두씩 배치하여 84일간 사양시험을 실시하였다. 일당증체량은 처리구별 유의적인 차이가 나타나지 않았다. 사료요구율은 시험1구와 시험2구가 대조구에 비하여 각각 9.3%과 17.1% 낮게 나타났다. 도체성적의 경우 등지방두께와 등심단면적은 처리구별 차이가 나타나지 않았다. 처리구별 육질등급별 출현율은 1++등급 출현율은 시험1구 (42.9%)에서 가장 높았고, 시험2구 (26.7%)에서 가장 낮게 나타났다. 도체등심의 지방산 조성은 불포화지방산 함량은 시험1구가 시험2구에 비하여 유의적 (P<0.05)으로 높게 나타났으며, C18:2 (linoleic acid) 및 다가불포화지방산은 시험1구 및 시험2구에서 유의하게 (P<0.05) 높게 나타났다. 이상과 같은 결과를 종합해 보면, 거세한우의 비육후기에 DDGS 15% 급여한 시험1구에서 사료요구율, 육질등급 및 불포화지방산 함량 증가에 효과적인 것으로 나타났다.
Abstract
The current studies was carried out to determine the effects of dietary distiller's dried grain with solubles (DDGS) supplementation on growth performances, carcass characteristics and muscle fatty acid composition of Hanwoo steers. Forty four finishing Hanwoo steers (average 28.2 months old/747.1±62.8kg body weight) were allocated into either control, treatment 1 (DDGS 15%) and treatment 2 (DDGS 30%) based on body weight and ages for 84 days. Average daily gain did not differ among the treatments. Feed conversions in treatment 1 and 2 were improved by 9.3% and 17.1% compared with control. Carcass characteristics, back fat thickness and M. longissimus dorsi area did not differ among the treatments. The percentage of carcass quality grade above 1++grade in treatment 1 was 42.9%, which was the highest among the treatments. Oleic acid and unsaturated fatty acid treatment 1 were higher (P<0.05) than these in treatment 2. Polyunsaturated fatty acids (PUFAs) in both treatment 1 and 2 were significantly (P<0.05) higher than control group. In conclusion, supplementation of 15% DDGS in concentrate diet could improve feed conversion, marbling score and fatty acid composition in the finishing stage of Hanwoo steers.
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