[학위논문]지방 공급원과 비타민 C와 E 급여가 비육후기 거세 한우의 증체와 육질 특성에 미치는 영향 Effects of Fat Sources and VitaminC and E on Weight Gain and Carcass Characteristics of Hanwoo Steer원문보기
영문초록: Recently, a variety of methods has been introduced for producing high-qualified meat and satisfying the need of consumers in Hanwoosteers through nutritional manipulation. The quality of beef meat mainly depends on intramusclur fat content which is one of the factors determining the taste of meat. However, it is not clear what factors have direct effects on the ...
영문초록: Recently, a variety of methods has been introduced for producing high-qualified meat and satisfying the need of consumers in Hanwoosteers through nutritional manipulation. The quality of beef meat mainly depends on intramusclur fat content which is one of the factors determining the taste of meat. However, it is not clear what factors have direct effects on the differentiation of adipocytes and the fat accumulation. These can be accounted for to some content by breed, sex, fattening periods, and castration. It is possible to improve intramuscluar fat content and meat quality of Hanwoo steers by providing and modulating supplemental fat sources in practice. With the use of various fats, the roles of vitamin C and E are being focused on as factors affecting intramuscular fat and meat quality. At present, more studies about the effects of vitamin C and E on the meat quality are still needed. So the following experiments were performed for clarifying the effect of vitamin C and E on the quality and fat composition of Hanwoo steer meat. This study was summarized as belows, In Experiment 1 the effects of hydrogenated palm oil, cotton seed, and linseed on the marbling of intramuscular fat, growth rate, and meat quality during late fattening period were evaluated by using 24 of Hanwoo steers.There was no difference of total body weight gain between treatments during trial periods. Daily weight gain was highest in hydrogenated palm oil treatment (0.74 kg), and then 0.62, 0.58, 0.50 kg in control, cottonseed and linseed treatment, respectively (P<0.01). There was no significant difference between treatment and control groups. Feed intake tend to be lower in fat-supplemented group than in control group.Carcass percentage of control group (60.2%) was higher than that of cottonseed-treated group(P<0.05), and fat sources have no effect on carcass percentage. There were similar in longissimus muscle area, back fat thickness, and yield grade between experimental groups. Intramuscular fat content was highest in animals supplimented with linseed(P<0.05). Meat color, fat color, texture, and meat quality grade did not show any difference. But meat quality grades were 2.0, 2.5, 2.0 and 1.3 in control, hydrogenated palm oil, cottonseed treated group, respectively. And meat quality grade of linseed- treated group was inclined to have higher than those of other groups(P<0.05).Total polyunsaturated fatty acids of longissimus muscle were 61.16, 63.73, 64.12, and 64.56 % in control, hydrogenated palm oil, cottonseed and linseed groups, respectively. Especially, its quantity was more in linseed-treated groups than in control group. Experiment 2 examined the effects of daily supplements of 1,000 IU vitamin E & 10g vitamin C on the marbling intramuscular fat, growth rate, and quality by 18 Hanwoo steers during late fattening period.Vitamin C, and E treatments did not influence total body weight gain, and daily weight gain of Hanwoo steers significantly. And feed intake be likely to increase in control group rather than the other groups.There were no differences in carcass body weight and longissimus muscle area between treatments, and carcass percentage was higher in vitamin E-treated than vitamin C-treated group(P<0.01). Back fat of vitamin E or C supplemented groups was thicker than that of control group, and vitamin E-treated group had thickest back fat (P<0.01). Yield grade of control group was higher compared with that of vitamin E-treated group. Intramuscular fat content were 4.4, 3.7, and 5.2 in control, vitamin E, and vitamin C-treated groups respectively(P<0.05). Meat color of vitamin E or C-treated group was brighter than that of control group(P<0.05). The difference of fat color, texture and maturity of meat between groups were not significant, and the result of meat quality grade were 2.0, 2.3, and 1.7 in control, vitamin E, and vitamin C-treated groups in that order, control and vitamin C-treated group showed the improved result than vitamin E-treated group(P<0.05). Experiment 3 were performed for studying the effects of feeding hydrogenated palm oil, cottonseed, and linseed with vitamin C 10g a day on the marbling, growth rate, and meat quality in Hanwoo steers at late fattening stage.Total body weight gain(kg) and daily body weight gain(kg) were 55.6, 70.2, 62.3, 59.5, and 0.62, 0.78, 0.69, 0.66 in control, vitamin C & hydrogenated palm oil, vitamin C & linseed, and vitamin C & cottonseed-treated groups, respectively. And the weight gain of vitamin C & hydrogenated palm -treated group was higher than those of other treatments, but did not show any significant difference. Feed intake had a tendency to be more in control group than in the other groups.Back fat thickness was higher in vitamin C & cottonseed -treated group than in control group(P<0.05). Back fat thickness of fat-treated group was inclined to be higher than that of control group. As for intramuscular fat content, meat color, fat color, texture, maturity, and meat quality grade, there did not show any significant difference between groups.Total unsaturated fatty acid of longissimus muscle were 61.16, 61.23, 62.30, and 60.70% in control, vitamin C & hydrogenated palm oil, vitamin C & linseed, and vitamin C & cottonseed -treated group, respectively. And its content was higher in vitamin C & linseed -treated group than in vitamin C & cottonseed -treated group (P<0.05). The vitamin C & cottonseed -treated group was lowest content of C16:1(P<0.01) and C18:1(P<0.05) and highest content of C18:3 and C20:4 than those of other treatments(P<0.01). The content of C18:2 in subcutaneous fat was highest in vitamin C & linseed -treated group, and lowest in vitamin C & cottonseed -treated group(P<0.01). It is likely for feeding vitamin C or linseed separately to improve meat quality during late fattening period. But it is inhibitory for meat quantity grade without any improvement of meat quality to feed vitamin C and fat at the same time. From these results, it can be a good way for develop carcass quality of Hanwoo steers to supplement vitamin C or linseed at late fattening stage. But it is necessary to require more researches to investigate the mechanism of fat accumulation in muscle according to vitamin C and energy source
영문초록: Recently, a variety of methods has been introduced for producing high-qualified meat and satisfying the need of consumers in Hanwoo steers through nutritional manipulation. The quality of beef meat mainly depends on intramusclur fat content which is one of the factors determining the taste of meat. However, it is not clear what factors have direct effects on the differentiation of adipocytes and the fat accumulation. These can be accounted for to some content by breed, sex, fattening periods, and castration. It is possible to improve intramuscluar fat content and meat quality of Hanwoo steers by providing and modulating supplemental fat sources in practice. With the use of various fats, the roles of vitamin C and E are being focused on as factors affecting intramuscular fat and meat quality. At present, more studies about the effects of vitamin C and E on the meat quality are still needed. So the following experiments were performed for clarifying the effect of vitamin C and E on the quality and fat composition of Hanwoo steer meat. This study was summarized as belows, In Experiment 1 the effects of hydrogenated palm oil, cotton seed, and linseed on the marbling of intramuscular fat, growth rate, and meat quality during late fattening period were evaluated by using 24 of Hanwoo steers.There was no difference of total body weight gain between treatments during trial periods. Daily weight gain was highest in hydrogenated palm oil treatment (0.74 kg), and then 0.62, 0.58, 0.50 kg in control, cottonseed and linseed treatment, respectively (P<0.01). There was no significant difference between treatment and control groups. Feed intake tend to be lower in fat-supplemented group than in control group.Carcass percentage of control group (60.2%) was higher than that of cottonseed-treated group(P<0.05), and fat sources have no effect on carcass percentage. There were similar in longissimus muscle area, back fat thickness, and yield grade between experimental groups. Intramuscular fat content was highest in animals supplimented with linseed(P<0.05). Meat color, fat color, texture, and meat quality grade did not show any difference. But meat quality grades were 2.0, 2.5, 2.0 and 1.3 in control, hydrogenated palm oil, cottonseed treated group, respectively. And meat quality grade of linseed- treated group was inclined to have higher than those of other groups(P<0.05).Total polyunsaturated fatty acids of longissimus muscle were 61.16, 63.73, 64.12, and 64.56 % in control, hydrogenated palm oil, cottonseed and linseed groups, respectively. Especially, its quantity was more in linseed-treated groups than in control group. Experiment 2 examined the effects of daily supplements of 1,000 IU vitamin E & 10g vitamin C on the marbling intramuscular fat, growth rate, and quality by 18 Hanwoo steers during late fattening period.Vitamin C, and E treatments did not influence total body weight gain, and daily weight gain of Hanwoo steers significantly. And feed intake be likely to increase in control group rather than the other groups.There were no differences in carcass body weight and longissimus muscle area between treatments, and carcass percentage was higher in vitamin E-treated than vitamin C-treated group(P<0.01). Back fat of vitamin E or C supplemented groups was thicker than that of control group, and vitamin E-treated group had thickest back fat (P<0.01). Yield grade of control group was higher compared with that of vitamin E-treated group. Intramuscular fat content were 4.4, 3.7, and 5.2 in control, vitamin E, and vitamin C-treated groups respectively(P<0.05). Meat color of vitamin E or C-treated group was brighter than that of control group(P<0.05). The difference of fat color, texture and maturity of meat between groups were not significant, and the result of meat quality grade were 2.0, 2.3, and 1.7 in control, vitamin E, and vitamin C-treated groups in that order, control and vitamin C-treated group showed the improved result than vitamin E-treated group(P<0.05). Experiment 3 were performed for studying the effects of feeding hydrogenated palm oil, cottonseed, and linseed with vitamin C 10g a day on the marbling, growth rate, and meat quality in Hanwoo steers at late fattening stage.Total body weight gain(kg) and daily body weight gain(kg) were 55.6, 70.2, 62.3, 59.5, and 0.62, 0.78, 0.69, 0.66 in control, vitamin C & hydrogenated palm oil, vitamin C & linseed, and vitamin C & cottonseed-treated groups, respectively. And the weight gain of vitamin C & hydrogenated palm -treated group was higher than those of other treatments, but did not show any significant difference. Feed intake had a tendency to be more in control group than in the other groups.Back fat thickness was higher in vitamin C & cottonseed -treated group than in control group(P<0.05). Back fat thickness of fat-treated group was inclined to be higher than that of control group. As for intramuscular fat content, meat color, fat color, texture, maturity, and meat quality grade, there did not show any significant difference between groups.Total unsaturated fatty acid of longissimus muscle were 61.16, 61.23, 62.30, and 60.70% in control, vitamin C & hydrogenated palm oil, vitamin C & linseed, and vitamin C & cottonseed -treated group, respectively. And its content was higher in vitamin C & linseed -treated group than in vitamin C & cottonseed -treated group (P<0.05). The vitamin C & cottonseed -treated group was lowest content of C16:1(P<0.01) and C18:1(P<0.05) and highest content of C18:3 and C20:4 than those of other treatments(P<0.01). The content of C18:2 in subcutaneous fat was highest in vitamin C & linseed -treated group, and lowest in vitamin C & cottonseed -treated group(P<0.01). It is likely for feeding vitamin C or linseed separately to improve meat quality during late fattening period. But it is inhibitory for meat quantity grade without any improvement of meat quality to feed vitamin C and fat at the same time. From these results, it can be a good way for develop carcass quality of Hanwoo steers to supplement vitamin C or linseed at late fattening stage. But it is necessary to require more researches to investigate the mechanism of fat accumulation in muscle according to vitamin C and energy source
주제어
#Vitamin C Vitamin E Fat sources Hanwoo steers Carcass Characteristics Cotton seed Linseed
학위논문 정보
저자
김철
학위수여기관
건국대학교 대학원
학위구분
국내박사
학과
영양자원학과 영양학전공
발행연도
2004
총페이지
x, 155 p.
키워드
Vitamin C Vitamin E Fat sources Hanwoo steers Carcass Characteristics Cotton seed Linseed
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