Holstein 젖소에 있어서 유량 및 유성분에 미치는 환경 및 생리적 요인

한광진,안종호,이득환 한국동물자원과학회 2004 한국축산학회지 Vol.46 No.3

한국산 보증종모우 선발을 위한 젖소후대검정사업의 중요성과 추진방향

한광진 한국종축개량협회 1999 種畜改良 Vol.21 No.3

젖소개량을 위한 후대검정사업

한광진 한국종축개량협회 2001 젖소개량 Vol.6 No.12

가축개량성과와 향후 개량방향

한광진,Han, Gwang-Jin 한국종축개량협회 2006 種畜改良 Vol.11 No.6

貯藏穀物 Bin內의 二次元 熱傳達模型

韓光珍,金滿秀 충남대학교 농업과학연구소 1985 農業技術硏究報告 Vol.12 No.1

The grain temperature is a crucial factor determining the deterioration rate of stored grain. Therefore, it is used to be predicted in order to evaluate the various stored methods rapidly and inexpensively. In this study, a mathematical model was developed to simulate the temperatures of grain stored in a cylinderical bin. It was formulated for the two dimensional heat transfer by the finite difference method. Then, it was verified statistically using the actual test deta and the predicted. The changes of grain temperature were analyed using the simulated data of one year for a safe stoarge and the following results were obtained : 1. Simulation model developed by the finite difference method was validated with the actual and the predicted grain temperatures and it's result snowed that it could predict the grain temperature of storage bin reasonably well. 2. Grain temperature near the wall of storage bin were changed with 6-7℃ higher then average atmospheric temperature from June to September. Therefore, the parts of stored grain near the wall is supposed to be deteriorated fast. 3. When the dimension of bin diameter is about the same as the bed height, the changes of grain temperature of radial direction was higher than the verticals. 4. The predicted temperature showed that the grain temperature of which were from the end of April to mid October were higher than the safe storage limit at Yusung, Korea.

젖소개량체계를 위한 낙농종합정보망 구축

한광진,남인식,이득환 한국농업정보과학회 2000 농업정보과학 Vol.1 No.2

National Dairy Herd Improvement (DHl) program has been processed by Dairy Cattle Improve-ment Center (DCIC) as a branch of National Livestock Cooperatives Federation (NLCF) in order to enhance the dairy productivity of dairy farms in Korea since 1979. This program has been renewed to improve farm management systems by providing useful information in milking productivity, feeding condition and genetics. Under DHI program, all dairy farm records, such as individual milk production, fat and protein components, nutrition level, somatic cell count and reproduction data are collected and analyzed provide information to all members who join this program by monthly in cooperation with member-coops of NACF nationwide using net-work technology. By participating in this Total Dairy Management Consulting Service, dairy farmers, who have memberships, have been able to get new skill and technology and renovate their management. Within the year 2003, over 60% of total dairy herds should be expected to enroll in this program. For DH farmers, DCIC Internet system like World Wide Web (http://www.dcic.co.kr) can be a convenient tool to offer lots of informa- tion related to individual DHI cow's records. Dairy farmers can also order some of merchandise like semen, farming appliances by sending a sheet of invoice to DCIC under this web-site. Farmers may, especially, select and purchase the suitable semen referenced by the report that includes some of guideline of mating on each cow of the farm, which brings newest information on international dairy industry by Internet on DCIC. DCIC dairy network system has been linked to the several network systems such as National Livestock Research Insti-tute (NLRI), National Veterinary Research and Quarantine Service OfVRQS), agricultural colleges, livestock associations, private institutions and dairy farms in Korea. Identification system of each cow can be requisite for health survey of animal and for prevention against meat contaminates from some infectious virus as well as tool of breed improvement. So DCIC has held common cow unique ID for a lifetime with other organizations such as 32 DHI centers, breed association (KAIA). These unique ID systems should be most efHciently shared with those organizations using networking technologies which are likely to be of great helpful to all dairy farm-ers and organizations related to competent players in the area of international dairy industry.

성공적인 낙농을 위한 젖소 산유능력 검정사업 방향

한광진 한국종축개량협회 1996 種畜改良 Vol.18 No.6

능력검정 종료 종모돈의 경매가격에 영향하는 요인

한광진,박영일 ( K . J . Han,Y . I . Park ) 한국축산학회 1985 한국축산학회지 Vol.27 No.6

The economic importance of the three performance traits, average daily gain, feed efficiency and backfat thickness in determining the sale price of performance tested boars was evaluated on the basis of the data from the Korea Boar Testing Station. A total of 54 Duroc, 57 Yorkshire and 36 Landrace boars met qualifying requirements and were sold at the public auctions held each month from July, 1984 to December, 1984. The phenotypic correlations of sale price with average daily gain, feed efficiency and backfat thickness were 0.50, -0.40 and -0.34 in the Duroc, 0.53, -0.29 and -0.39 in the Yorkshire and 0.59, -0.28 and -0.35 in the Landrace. The coefficient of determination in the multiple regression analysis of sale price using the three performance traits as independent variables was 0.51 in the Duroc, 0.48 in the Yorkshire and 0.47 in the Landrace.

한우의 체중과 체척치에 대한 유전모수의 추정

한광진 한국동물자원과학회 2002 한국축산학회지 Vol.44 No.2

본 연구는 한우개량에 필요한 기초자료를 얻기 위하여 1979년부터 1995년 사이에 전국 한우개량단지에서 조사한 체중과 10개 부위의 체적치에 대한 자료를 가지고 유전모수 추정에 이용하였으며 얻어진 결과를 요약하면 다음과 같다. 1) 유전력의 추정치는 생시, 이유시, 12개월령 및 27개월령 체중에서 각각 0.208±0.038, 0.457±0.073, 0.476±0.082 및 0.227±0.040으로 추정되었으며 12개월령 및 27개월령의 체고, 체장 및 흉위에서 각각 0.326, 0.486, 0.462 및 0.242, 0.110, 0.170으로 추정되었다. 2) 12개월령 체중과 체적치들간의 유전상관과 표현형상관은 모두 정의 값으로 추정되었으며 그 범위는 0.223부터 0.999까지 이었다. 27개월령 체중과 체적치들간의 유전상관과 표현형상관도 모두 정의 값으로 추정되었으며 그 범위는 0.290부터 0.083까지 이었다. This study was conducted to estimate heritabilities and genetic and phenotypic correlations among body weight and 10 different body measurements on the basis of the data from Korean cows at Korean Cattle Improvement Areas from 1979 to 1995. Results obtained are as follows, 1. Heritabilities of body weight at birth, weaning, 12 months and 27 months of age estimated were 0.208±0.038, 0.457±0.073, 0.476±0.082 and 0.227±0.040, respectively. Heritabilities of body measurements at 12 and 27 months of age estimated were 0.326 and 0.242 for withers height, 0.486 and 0.110 for body length and 0.462 and 0.170 for chest girth 2. Genetic and phenotypic correlations among body weight and ten body measurements at 12 months of age were positive ranging from 0.223 to 0.999. Genetic and phenotypic correlations among body weight and ten body measurements at 27 months of age were positive ranging from 0.290 to 0.883.

한우의 번식형질에 대한 환경요인의 효과

한광진 한국동물자원과학회 2002 한국축산학회지 Vol.44 No.2

본 연구는 1986년부터 1995년도 사이에 한우개량단지의 한우 암소에 대하여 조사된 번식성적에 근거하여 한우의 번식형질에 미치는 환경요인의 효과를 추정하기 위하여 실시하였으며, 분석된 결과를 요약하면 다음과 같다. 1) 평균능력에서 초종부일령은 466.11±5.72일, 초임일령은 480.10±6.15일, 초산일령은 742.79±7.48일, 분만후 초종부일령은 64.97±1.42일, 공태일수는 72.06±1.73일, 번식간격은 355.93±1.92일, 임신기간은 285.38±0.42일 및 수태당 종부회수는 1.21±0.02회였다. 2) 지역별 각 형질에 대한 범위는 초종부일령은 447.62±5.94∼490.72±5.94일, 초임일령은 464.27±6.38∼505.20±6.39일, 초산일령은 721.91±7.85∼772.75∼7.80일, 분만 후 초종부일령은 62.27±1.55∼68.97±1.74일, 공태일수는 69.74±1.97∼74.36±2.27일, 번식간격은 352.71±2.18∼359.64±2.09일, 임신기간은 284.52±0.42∼286.04±0.47일 및 수태당 종부회수는 1.11±0.02∼1.30±0.02회였다. 3) 초종부일령은 혈통등록우가 가장 길었고 상위등록일수록 일령이 빨라지는 경향이 있었다. 수태당 종부회수는 상위등록우로 갈수록 종부회수가 많게 추정되었다. 4) 분만후 초종부일수는 2산차에서 가장 길었으며 산차가 진행될수록 줄어드는 경향을 보였다. 수태당 종부회수는 산차가 진행될수록 적어지는 경향을 보였다. 5) 분만년도가 1987년부터 1995년까지 경과할수록 분만후 초종부일수, 공태일수 및 번식간격이 길어지고 수태당 종부회수는 많아지는 경향이 있었다. 6) 분만후 초종부 일수, 공태일수 및 번식간격은 봄과 여름에 분만한 소들에서 가을과 겨울에 분만한 소들에 비하여 다소 짧게 추정되었다. 수태당 종부회수는 봄과 여름에 분만한 소들에 비하여 가을과 겨울에 분만한 소들에게서 더 많은 경향이 있었다. This study was conducted to estimate the effects of environmental factors on certain reproductive traits in Korea cattle on the basis of data from Korean Cattle Improvement Areas which were surveyed from 1986 to 1995. Results obtained were summarized as follows ; 1. Least square means of the reproductive traits estimated were 466.11±5.72 days for age at 1st service, 480.10±6.15 days for age at 1st conception, 742.79±7.48 days for age at 1st calving, 64.97±1.42 days for days at 1st service postpartum, 72.06±1.73 days for days open, 355.93±1.92days for calving interval, 285.38±0.42 days for gestation length and 1.21±0.02 days for number of services for conception, respectively. 2. The ranges of the least squares means for the districts were 447.62±5.94∼490.72±5.94 days for age at 1st service, 464.27±6.38∼505.20±6.39 days for age at 1st conception, 721.91±7.85∼772.75∼7.80 days for age at 1st calving, 62.27±1.55∼68.97±1.74days for days at 1st service postpartum, 69.74±1.97∼74.36±2.27days for days open, 352.71±2.18∼359.64±2.09 days for calving interval, 284.52±0.42∼286.04±0.47days for gestation length and 1.11±0.02∼1.30±0.02 days for number of serveces for conception, respectively. 3. Age at 1st service was latest in the cows with Basic Register and tended to be earlier for the more advancd registers. The number of services per conception tended to increase for the more advanced registers. 4. Days at 1st service postpartum was longest in the 2nd parity and tended to be shorter with the advancement of parity. The number of services per conception tended to decrease with the advancement of parity. 5. As the calving year advances from 1987 to 1995, days at 1st service postpartum, days open and calving interval tended to be longer, and number of service per conception tended to increase. 6. Days at 1st service postpartum, days open and calving interval were shorter in the cows that calved in spring and summer than in the cows that calved in fall and winter. The number of services per conception was larger in the cows that cocalved in fall and winter than the cows that calved in spring and summer.