섬유소분해 효소의 급여수준 및 급여시기가 한우 거세비육우의 사료효율과 도체특성에 미치는 영향
Effects of Supplemental Level and Period of Fibrolytic Enzyme on Feed Efficiency and Carcass Characteristics of Hanwoo Steers in Fattening Phase
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본 연구는 섬유소분해 효소제를 공급수준에 따라 비육전기 및 비육후기 한우 거세우에 적용하였을 때성장 및 도체성적에 미치는 영향을 조사하기 위하여 수행하였다. 시험동물은 비육전기 및 비육후기 거세우로 각각 54두씩 총 108두를 대상으로 하였으며, 시험 개시 시 공시된 비육전기 및 후기 거세우의평균체중은 각각 397.4±27.2(평균 17개월령), 525.2±47.4kg(23개월령) 이었다. 시험사료는 비육전기사료와 비육후기 사료를 구분하여 대조구 사료에 섬유소분해 효소제 0.05(E0.05, L0.05), 0.15%(E0.05, L0.15)를 첨가한 비육전기 및 비육후기 각각 3처리구에 각 처리당 6마리씩 3반복으로 완전임의배치하여 실시하였다. 비육후기 한우 거세우에서 농후사료 섭취량은 대조구와 L0.15구에서 L0.05와비교하여 증가하였으며, 총 건물섭취량 역시 동일한 결과를 나타냈다(p<0.001). 반면, 비육전기 및 후기 한우 거세우 모두 증체량 및 사료효율은 유의한 차이를 나타내지 않았다. 한편 비육후기 거세우의도체특성은 L0.05와 L0.15구에서 대조구와 비교하여 지방색이 유의하게 높은 것으로 조사되었다(p<0.01). 등심조직의 지방산 분석은 대조구와 처리구는 유의한 차이를 나타내지 않았다. 결과적으로본 시험에 사용된 섬유소 분해효소의 비육기 한우 거세우에 대한 첨가효과는 등심의 지방색이 짙어진것을 제외하고 없는 것으로 나타났으며, 추 후 볏짚 위주의 조사료 급여체계에서 효소제 첨가수준 및효소역가에 대한 추가적인 연구가 필요할 것으로 판단된다.
Abstract
This experiment was conducted to observe the effects of fibrolytic enzyme (FE) inclusion ongrowth performance and carcass characteristics in early and late fattening phase of Hanwoosteers. Early (n=54, 17 month of age, 397.4±27.2 kg initial body weight) and late (n=54, 23month of age, 525.2±47.4 kg initial body weight) fattening phase of Hanwoo steers wereconventional separate fed a concentrate diet and rice straw bale for 8 month. The dietarytreatments were randomly assigned into three treatment groups, three replicates, six heads pereach early and late fattening phase by complete block design. Experimental groups were earlyfattening phase; basal diet (control), basal diet + 0.05% FE (E0.05), basal diet + 0.15% FE (E0.15) and late phase; basal diet (control), basal diet + 0.05% FE (L0.05), basal diet + 0.15%FE (L0.15). Meat grade was estimated by the Korean carcass grading system. Concentrate andtotal DM intakes of late fattening phase of Hanwoo steers were significantly higher in thecontrol and L0.15 than in the L0.05 (p<0.001). However, average daily gain and feed efficiencywere not affected by the FE inclusion. Fat color was higher in the L0.05 and L0.15 (2.89) thanin the control (2.50) (p<0.01). The results obtained from this study demonstrate that FEadditives had no effect on average daily gain and feed efficiency. Enzyme activities and optimal
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