표제지
목차
I. 서론 9
II. 연구사 11
1. 비육우의 사육단계별 사료 급여수준에 따른 비육능력 12
2. 곡류의 가공형태가 비육우의 섭취량 및 반추위 대사에 미치는 영향 15
3. 곡류 가공형태가 비육우의 비육 및 도체특성에 미치는 영향 21
III. 재료 및 방법 24
1. 시험 동물 및 시험 설계 24
2. 시험기간 및 장소 25
3. 시험 사료 25
4. 사료 급여 프로그램 설정 29
5. 거세 29
6. 사양관리 32
7. 도체 특성 조사 32
1) 육질등급판정 33
2) 육량등급판정 34
8. 도체의 이화학적 특성 및 융점 분석 35
1) 시료채취 및 처리 35
2) 시료분석 35
9. 경제성 분석 36
10. 통계 처리 37
IV. 결과 및 고찰 38
1. 비육성적 38
1) 육성기 38
2) 비육전기 42
3) 비육후기 46
4) 전 비육기간 50
2. 도체 성적 59
3. 경제성 분석 65
V. 요약 67
VI. 참고문헌 70
ABSTRACT 79
Table 1. Feeding regimen of concentrate for the entire experiment 24
Table 2. Chemical composition of the concentrate diets 26
Table 3. Chemical composition of roughages 27
Table 4. Physico-chemical characteristics and the distribution of particle size in flake and ground corns 28
Table 5. Feeding program for Hanwoo steers in the experiment 30
Table 6. Effects of physical form of concentrate on the performance during growing phase in Hanwoo steers 40
Table 7. Effects of physical form of concentrate on crude protein (CP) and total digestible nutrient (TDN) intake and their conversion ratio duringgrowing phase of Hanwoo steers 41
Table 8. Effects of physical form of concentrate on the performance during fattening phase in Hanwoo steers · 44
Table 9. Effects of physical form of concentrate on crude protein (CP) and total digestible nutrient (TDN) intake and their conversion ratio during fattening phase of Hanwoo steers 45
Table 10. Effects of physical form of concentrate on the performance during finishing phase in Hanwoo steers 48
Table 11. Effects of physical form of concentrate on crude protein (CP) and total digestible nutrient (TDN) intake and their conversion ratio during finishing phase in Hanwoo steers 49
Table 12. Effects of physical form of concentrate on the performance during the entire periods in Hanwoo steers 55
Table 13. Effects of physical form of concentrate on crude protein (CP) and total digestible nutrient (TDN) intake and their conversion ratio during the entire periods in Hanwoo steers 56
Table 14. Effects of physical form of concentrate on carcass characteristics in Hanwoo steers 62
Table 15. Effects of physical form of concentrate on the physico-chemical characteristics of the longissimus dorsi muscle in Hanwoo steers 63
Table 16. Effects of physical form of concentrate on melting point of carcass fat in Hanwoo steers 64
Table 17. Effects of physical form of concentrate on profits in Hanwoo steers 66
Figure 1. The grapically-reformed feeding program 31
Figure 2. Effect of physical form of concentrate on daily concentrate and roughage intake during the growing, fattening and finishing periods in Hanwoo steers 57
Figure 3. Effect of physical form of concentrate on daily gain during the growing, fattening and finishing periods in Hanwoo steers 58