원문정보
Effect of Enzyme and Yeast Extract Supplement on Growth Performance, Carcass Characteristics and Blood Parameters in Hanwoo Steers
초록
영어
This study was conducted to investigate the effect of enzyme and yeast extract supplement on growth performance, carcass characteristics and blood parameters in Hanwoo steers. A total of forty-eight 23-month-old Hanwoo steers, with average initial body weight of 545.25±12.60 kg, were assigned to four treatments with three replicates in a completely randomized design. Hanwoo steers housed in four heads group per pen. The treatments comprised of four groups of control (no feed additives), treatment 1 (xylanase, cellulase, and gluco-amylase; 0.1%/concentrate), treatment 2 (β-glucan and mannan-oligosaccharide; 0.1%/concentrate), and treatment 3 (treatment 1+2; 0.1%/concentrate). During the fourth and eighth month, average daily gain and feed conversion rates improved in treatment 1, but in the control this was lower than the other treatments (p<0.05). Real-time ultrasound was used for measuring the live carcass traits (longissimus muscle area, back fat thickness, and marbling score) and the better results were in the following order: treatment 1 > treatment 3 > treatment 2 > control, and extended to carcass grade. White blood cell indices were lower in treatments 2 and 3 and the IgG indices were relatively higher than in other treatments. As a result, levels of xylanase, cellulase, and gluco-amylase were increased from the fourth month to improve growth performance, live carcass traits. During the second month, β-glucan and mannan- oligosaccharide increased IgG indices in blood parameters.
목차
Ⅰ. 서론
Ⅱ. 재료 및 방법
1. 시험동물 및 시험방법
2. 사양관리
3. 조사항목
4. 통계분석
Ⅲ. 결과 및 고찰
1. 사료섭취량, 일당증체량, 사료요구율
2. 첨가제 급여에 따른 산육 및 도체형질 변화추이
3. 첨가제 급여에 따른 혈액성상 변화 추이
Ⅳ. 요약
사사
Ⅴ. REFERENCES
저자정보
참고문헌
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