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RISS 인기검색어
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- 저자 : 박노형(N . H . Park) (검색결과 4 건)
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이성수,정재경,박노형,원유석 ( S . S . Lee,J . K . Jung,N . H . Park,Y . S . Won ) 한국축산학회 1997 한국축산학회지 Vol.39 No.2
Twenty steers and 20 bulls averaging 7 Mo. of age were employed to investigate the effects of casrration on the carcass characteristics, serum metabolites and hormones of Korean cattle from 7 Mo. to 25 Mo. of age. Dressing percent(P$lt;0.05), cold carcass weight(P$lt;0.01) and longissimus dorsi area(P$lt;0.01) of bulls and steers were 57.6±0.44; 58.6±0.36%, 306.9±0.97; 344.9±0.51Kg and 74.3±0.97; 84.7±0.15㎠, respectively. Steers had more marbling score than bulls(4.4±0.11 vs 1.5±0.22; P$lt;0.01). Differences between bulls and steers in serum insulin-like growth factor-1(IGF-1) concentrations and testosterone, stimulate protein synthesis and growth, were large(P$lt;0.01) after 15 Mo. and 9 Mo. of age, respectively. Serum cortisol concentrations had increased rapidly at 19 Mo. of age both in bulls and steers. Steers had higher cortisol concentrations, stimulate lipid metabolism and deposit of intermuscular lipid, than bulls. These results suggested that castration would be extended after 15 Mo. of age to increase beef quality and to conpensate the loss of weight gain due to castration.
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영양수준 , 연령 및 체중이 한우 정액성상에 미치는 영향
이성수,김진호,장윤호,박노형,원유석 ( S . S . Lee,J . H . Kim,Y . H . Jang,N . H . Park,Y . S . Won ) 한국축산학회 1998 한국축산학회지 Vol.40 No.4
Thirty proven Hanwoo sires, ranging from 5 to 9 years old, were used to investigate the effects of dietary nutrition level, age and body weight on semen characteristics which were analyzed using CASA(Computer-aided sperm analyzer) and to determine the proper nutritive level, age and body weight for production of high quality semen. The groups fed a diet meeting the NRC requirements for maintenance(NRC) had more semen volume than the groups fed at additional 10% level(NRC + 10%). However, tendencies were the opposite in sperm concentration and motion characteristics. Sperm concentrations of 9 years old sires had lower than those of others and the sires below 800㎏ body weight were better than the sires over 800㎏ body weight in sperm motion characteristics[curvilinear velocity(VCL), straight-line velocity(VSL), beat-cross frequency(BCF)] and viability. Although the interaction of age and the nutrition level had not be significant on semen characteristics, VCL, VSL and ALH(amplitude of lateral head displacement) of the groups fed at NRC + 10% were better than those of the grops fed at NRC in every age. The sperm concentration of 9 years old sires with below 800kg of body weight were the lowest. The sperm motion characteristics of 7-8 and 9 years old were best in below 700㎏ and over 700㎏ of body weight, respectively. But individual difference of sperm motion characteristics were large in 9 years old sires. In every body weight except 700∼800㎏, the semen characteristics of groups fed at NRC + 10% were better than the those of groups fed at NRC. But the semen characteristics of the group of 700∼800㎏ body weight fed at NRC was the best among the those of others. Therefore, the proper age and body weight of Hanwoo sire for production of high quality semen would be 5∼8 years old with below 800㎏ of body weight. Feeding plane of sire below and over 700㎏ body weight would be fed at NRC + 10% level and NRC, respectively.
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성성숙 후 거세가 한우 거세우의 성장 및 도체형질에 미치는 효과
이성수(S . S . Lee),박노형(N . H . Park),원유석(Y . S . Won),이장헌(J . H . Lee),양일석(I . S . Yang) 한국축산학회 1999 한국축산학회지 Vol.41 No.1
8 steers and 22 bulls were employed to investigate the effects of castration after puberty on the growth performance and carcass traits of Hanwoo (Korean cattle). Even though the steers castrated at 16 months of age had a 12.9% reduction and 15.9% reduction in average daily gain (ADG) compared to bulls during the period of 16 to 25 months of age, the steers only had a 3.4% reduction in gain (P = 0.26) from birth to 25 months of age, and there was no difference in ADG during this period. Longissimus dorsi area and dressing percentage of bulls were larger and higher than those of steers (P$lt;0.05). Steers showed a superior (P$lt;0.01) marbling score to bulls (Steers : 4.8±0.32, Bulls : 1.8 ± 0.19). Therefore the castration after puberty improves meat quality and has little effect on growth performance.
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DNA 양상에 따른 한우의 근친계수와 혈연계수의 추정에 관한 연구
여정수,김재우,이은준,박노형,이문연 ( J . S . Yeo,J . W . Kim,E . J . Lee,N . H . Park,M . Y . Lee ) 한국축산학회 1998 한국축산학회지 Vol.40 No.2
Estimation of inbreeding and relationship coefficients using DNA fingerprinting in the Korean Cattle, revealed that the inbreeding coefficient dependent on band frequency in Korean Cattle(0.100) was lower at least 10% compared to foreign cattle breeds [Holstein(0.338), Charolais(0.217), Aberdeen-Angus(0.283), and Simmental(0.160)). Band sharing value of relationship coefficient groups(0.5, 0.25, 0.125, 0.0625) in Korean Cattle were 0.704, 0.611, 0.463, and 0.296 respectively. Genetic similarity has increased in group of higher relationship coefficients. Relationship coefficient(Y) on genetic similarity(X) could be accurately estimated as linear regression of Y = 0.526X + 0.469. Furthermore, the results will be useful to estimate genetic parameters of animal population without pedigree.
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