육우의 출하월령이 도체특성 및 경제성에 미치는 영향
Effects of Slaughtering Age on Carcass Characteristics and Economic Efficiency of Holstein Steers
4
조회
0
다운로드
1
인용
0
참고문헌
키워드
초록
This study was conducted to investigate the effects of the slaughtering age on carcass characteristics and economic efficiency of Holstein steers. The Holstein steers (n=27, 4 months old, average body weight 160 ㎏) were divided into 3 groups and raised with TMR feeding formulation until 18, 20 and 22 months old, respectively. In the result, final body weights were 703, 768 and 804 ㎏, and average daily gains were 1.32, 1.32 and 1.27 ㎏, respectively. Dry matter intakes (DMI) were 8.62, 8.94 and 9.24 ㎏. Feed conversion ratio was 6.53, 6.77 and 7.28 for 18, 20 and 22 months old groups. Feed conversion ratio was increased as the fattening periods increased. In yield traits, carcass weight was significantly lower in 18 months old group compared to other groups (p<0.05). The back fat thickness were 8.4, 7.3 and 7.8 ㎜, rib eye area were 70.6, 73.4 and 73.84 ㎠, and the meat yield index was 62.9, 62.5 and 62.1 when slaughtered at 18, 20 and 22 months old, respectively. In the frequency of the yield grade (A:B:C, %), grade B was highest at 20 months old group as 0:75:25. In the quality traits, marbling score, texture and maturity were not different among slaughtering age groups. However, marbling score tended to be increased at 22 months old group. Meat color and fat color were higher at 22 months old group compare to other groups (p<0.05). In the frequency of the quality grade (1+:1:2:3,%), 22 months-old group was the greatest as 12:0:50:38. The income was highest for 20 months old group as 279 thousand wons among the 3 groups. Therefore, the slaughtering ages of Holstein steers may be appropriate at 20 months old.
Abstract
This study was conducted to investigate the effects of the slaughtering age on carcass characteristics and economic efficiency of Holstein steers. The Holstein steers (n=27, 4 months old, average body weight 160 ㎏) were divided into 3 groups and raised with TMR feeding formulation until 18, 20 and 22 months old, respectively. In the result, final body weights were 703, 768 and 804 ㎏, and average daily gains were 1.32, 1.32 and 1.27 ㎏, respectively. Dry matter intakes (DMI) were 8.62, 8.94 and 9.24 ㎏. Feed conversion ratio was 6.53, 6.77 and 7.28 for 18, 20 and 22 months old groups. Feed conversion ratio was increased as the fattening periods increased. In yield traits, carcass weight was significantly lower in 18 months old group compared to other groups (p<0.05). The back fat thickness were 8.4, 7.3 and 7.8 ㎜, rib eye area were 70.6, 73.4 and 73.84 ㎠, and the meat yield index was 62.9, 62.5 and 62.1 when slaughtered at 18, 20 and 22 months old, respectively. In the frequency of the yield grade (A:B:C, %), grade B was highest at 20 months old group as 0:75:25. In the quality traits, marbling score, texture and maturity were not different among slaughtering age groups. However, marbling score tended to be increased at 22 months old group. Meat color and fat color were higher at 22 months old group compare to other groups (p<0.05). In the frequency of the quality grade (1+:1:2:3,%), 22 months-old group was the greatest as 12:0:50:38. The income was highest for 20 months old group as 279 thousand wons among the 3 groups. Therefore, the slaughtering ages of Holstein steers may be appropriate at 20 months old.
참고문헌 (19)
- Amer, P. R., "A bioeconomic model for comparing beef cattle genotypes at their optimal economic slaughter end point", J. Anim. Sci, 72, pp.38~50 (1994)
- AOAC, "Official methods of analysis", pp.210~219 (2006), association of official analytical chemists
- "Grade rule for cattle carcass in Korea" (2012)[URL]
- 조원모, "조사료원과 출하시기가 거세한우의 발육과 도체특성에 미치는 영향", 한국초지조사료학회지, 29(4), pp.375~382 (2009), 한국초지조사료학회
- Ibanez, C., "Partial replacement of sodium chloride with potassium chloride in dry fermented sausage : influence on carbohydrate fermentation and the nitrosation process", Meat Sci, 40, pp.45~53 (1995)
- Jung, K. K., "Effect of castration on the carcass grade of Hanwoo and Holstein", J. Anim. Sci. Technol, 38, pp.249~260 (1996)
- 강수원, "육성 및 비육전기의 조사료 급여형태가 홀스타인 거세우의 성장발육, 사료이용성 및 도체특성에 미치는 효과", 한국동물자원과학회지, 47(5), pp.769~782 (2005), 한국동물자원과학회
- 강수원, "홀스타인 거세우에 대한 육성기 농후사료 급여형태 및 출하월령이 성장발육, 사료이용성 및 도체특성에 미치는 효과", 한국동물자원과학회지, 46(6), pp.989~998 (2004), 한국동물자원과학회
- 김병기, "한우 거세유무 및 도축월령에 따른 비육능력 및 도체의 이화학적 특성 비교", 한국축산식품학회지, 31(2), pp.257~265 (2011), 한국축산식품학회
- Eung Gi Kwon, "Effects of Fattening Period on Growth Performance, Carcass Characteristics and Lipogenic Gene Expression in Hanwoo Steers", ASIAN-AUSTRALASIAN JOURNAL OF ANIMAL SCIENCES, 22(12), pp.1654~1660 (2009), 아세아·태평양축산학회
- Mark, D. R., "Identifying economic risk in cattle feeding", J. Agribus, 18, pp.331~344 (2000)
- Marti, S., "Effect of castration and slaughter age on performance, carcass, and meat quality traits of Holstein calves fed a high-concentrate diet", J. Anim. Sci, 91, pp.1129~1140 (2013)
- Pyatt, N. A., "Factors affecting carcass values and porfitability in early weaned Simmental steer: Ⅱ. Days on feed endpoints and sorting strategies", J. Anim. Sci, 83, pp.2926~2937 (2005)
- Sakata, R., "Heme pigment content in meat as affected by the addition curing agents", Meat Sci, 32, pp.343~350 (1992)
- Sanudo, C., "Influence of carcass weight on instrumental and sensory lamb meat quality in intensive production systems", Meat Sci, 42, pp.195~202 (1996)
- STAT Software for PC. Release 6.11, "SAS", pp.2012, SAS
- "Livestock Production Cost" (2012)[URL]
- Van Koevering, M. T., "Effect of time on feed on performance of feedlot steers, carcass characteristics, and tenderness and composition longissimus muscle", J. Anim. Sci, 31, pp.307~309 (1995)
- Vergara, H., "Influence of sex and slaughter weight on carcass and meat quality in light and medium weight lambs produced in intensive systems", Meat Sci, 52, pp.221~226 (1999)