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RISS 인기검색어
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- 저자 : 정재경(J . K . Chung) (검색결과 2 건)
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생체에서 초음파 측정기를 이용한 한우 도체형질의 추정에 관한 연구
김형철(H . C . Kim),전광주(G . J . Jeon),나기준(K . J . Na),유영모(Y . M . Yoo),정재경(J . K . Chung) 한국축산학회 1995 한국축산학회지 Vol.37 No.4
The carcass traits in live Hanwoo were estimated using the ultrasonic color scanning scope. A total number of 229 bull and steer records were measured. The data were collected for two years from 1992 to 1993. `Ihe estimates of backfat thickness using ultrasonic measurement from live animals for bulls and steers were 0.5㎝ and 0.91㎝, respectively, and those of slaughter measurement were 0.48㎝ and 0.91㎝, correspondingly. And also, the similar results were found for eye muscle area(EMA). The blue dot percentage indicating the marbling score tended to increase from 18 month of age to 21 month of age. The prediction equation using the linear regression were highly accurate for meat quantity(R²=0.91 to 0.93) but was less accurate for meat quality(R²=0.4).
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농후사료 급여수준이 비거세 한우의 증체와 부위별 지방조직의 지방산 조성에 미치는 효과
송만강,김내수,정정수,최양일,원유석,정재경,최성호 ( M . K . Song,N . S . Kim,C . S . Chung,Y . I . Choi,Y . S . Won,J . K . Chung,S . H . Choi ) 한국축산학회 1998 한국축산학회지 Vol.40 No.5
The study was conducted with 63 Hanwoo bull calves of 193 days old for 19 months(up to 26 month of age) to examine the effect of feeding level of concentrate on the body weight gain, feed requirements and fatty acid composition of adipose tissues of various locations(subcutaneous, abdominal, kidney, intermuscular and intramuscular fats). The calves were allotted into 3 treatments according to the feeding level of concentrate(85, 100 and 115%), and fed concentrates of Grower(7∼10 month of age), Finisher I(11∼16 month of age), Finisher II (17∼20 month of age) and Finisher III(21∼26 month of age). The feeding levels of concentrates for the cattle of 85% and 115% were decreased or increased by 15%, respectively, up to 15 month of age based on the similar body weight to the cattle of 100%. The feeding levels of the concentrates for the cattle of 85% and 100% were continuously increased for the next 2 months, to make same levels as for the cattle of I15%, thereafter amount of concentrate were continuously increased based on the rate of body gain for all the cattle. The cattle were fed in a individual feeding system through the experimental period. The cattle were slaughtered at the ages of 6, 14, 18 and 24 month and adipose tissues were collected to analyze long chain fatty acids. Results observed from the study were summarized as follows Overall mean dry matter intake and body gain per day and feed requirements of Hanwoo bulls during the 19 months of feeding from 193 day old calves were 6.69㎏, 0.95㎏ and 7.06, respectively. Body gain of the Hanwoo bulls during experimental period was greatly affected by the feeding level of concentrate, but feed requirement was improved up to 20 month of age with the decreased feeding level of concentrate. Fatty acids of C_(16:0) C_(18:0) and C_(18:1) in the adipose tissues at various locations of Hanwoo bulls were dominated. The feeding level of concentrate did not affect the fatty acid composition except for C_(16:1) and C_(18:1) in subcutaneous fat, and C_(18:1) and C_(18:2) in intramuscular fat of the cattle that were fed at the level of 85% at the age of 14 month(P$lt;.05). No differences were observed in fatty acid composition of adipose tissues of each location for the cattle of 18 and 24 month of age among treatments. There were tendencies of greater C_(16:1) and C_(18:1) in subcutaneous and intramuscular fats while higher C_(18:0) in abdominal fat. There were also trends of greater unsaturated fatty acid compositions in subcutaneous and intramuscular fats and higher saturated fatty acids in abdominal, kidney and intermuscular fats. Percent C_(18:0) tended to be decreased while C_(16:1) C_(18:1) and C_(18:2) increased with the age of Hanwoo bulls.
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