Earticle

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

ABSTRACT
 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

저자

• 하재정 [ Jae Jung Ha | 경상북도 축산기술연구소 ]
• 김병기 [ Byung Ki Kim | 경상북도 축산기술연구소 ]
• 오동엽 [ Dong Yep Oh | 경상북도 축산기술연구소 ]
• 이제영 [ Jea Young Lee | 영남대학교 통계학과 ]
• 오영균 [ Young Kyoon Oh | 국립축산과학원 ]
• 이선복 [ Sun Bok Lee | 농협사료 ]
• 김종복 [ Jong Bok Kim | 강원대학교 동물생명과학대학 ]
• 송영한 [ Young Han Song | 강원대학교 동물생명과학대학 ] Corresponding author

참고문헌