면양에 있어서 성장 및 산모량에 (産毛量) 영향을 미치는 불변요인효과에 관한 연구 Ⅲ. 생시 이유시 및 18개월령 체중에 대한 불변요인효과 추정

조헌조,강대진,최광수,오대균,김영직 ( H . C . Cho,D . J . Kang,K . S . Choi,D . K . Oh,Y . J . Kim ) 한국축산학회 1989 한국축산학회지 Vol.31 No.11

The study analyzed in the study were collected from the results of performance-testing on Corriedale, Polwarth at the Nawweon Branch of the National Animal Breeding Institute from January 1981 to May 1985. Birth weights, weaning weights, body weight at the age of 18-month were analyzed; and constants and least-squars means for the traits were estimated by the least-squares methods. The results are summarized as follows: 1. Years of birth affected significantly body weights at birth, at weaning and at the age of 18-month in corriedale and Polwarth(p $lt;0.01). The constant estimates of years of birth for birth weights ranged -0.167∼0.208㎏ in corriedale and -0.113∼0.089㎏ in Polwarth, and the corresponding figures for weaning weights were estimated -1.655∼1.509㎏ and -1.983∼2.051㎏; and the estimates for body weight at the age of 18-month were -1.982∼2.746㎏ and -1.757∼1.884㎏, respectively. 2. The effects of ages of dam were significant for birth weights and weaning(p $lt;0.01), but were not influential for body weights at the ages of 18-month. The constant estimates of ages of dam ranged -0.124∼0.079㎏ for birth weights and -0.664∼0.631㎏ for weaning weights in Corriedale, and the corresponding estimates in Polwarth were -0.133∼0.086㎏ and -0.628∼0.921㎏ respectively. Lambs from above two-year-old matured ewes were heavier than those from two-year-old ewes. 3. Sex of the individual lamb greatly affected birth weights and weaning weights in Corriedale and Polwarth, but no significant differences were found between lamb sexes in birth weights in polwarth compared with the birth and weaning weights of ewe-lambs those of ram-lambs were 0.08㎏ heavier in Corriedale and 0. 06㎏ heavier in polwarth, and weaning weights of ram-lambs were 1.22㎏ heavier in corriedale and 1.02㎏ in Polwarth. 4. Types of birth had significant effects on body weighs at birth and weaning in Corriedale and Polwarth(p $lt;0.01). Singles were heavier than twins by 0.68㎏ in corriedale and 0.48㎏ in polwarth at weaning In body weights at the age of 18-months singles were superior to twins by 0.54㎏ in Corriedale and by 2.84㎏ in Polwarth, and a significant difference was detected only in polwarth

Estrogen 처리가 웅추의 발육과 장기중량에 미치는 영향

조헌조,변명대 ( H . J . Cho,M . D . Byun ) 한국축산학회 1977 한국축산학회지 Vol.19 No.1

To determin the practical level estrogen administration, 100 Demura lime cockerels of 5 weeks were used in this experiment and alloted. into 5 lots at complete random according to the level of estrogen injected. In order to study the effect of estrogen administrations on growth, dressing percentage and weight of organs in Demura male chicks, estrogen was administrated into breast muscle at the different levels of 5,000IU, 10,000IU, 15,000IU and 20,000IU for 35days. The results are summarized as follows: 1. Body weight at the end of experimental period in E₄ group was the most(10.78%) showing the significance with P$lt;0.01 and E₁ and E₂ group apparently lighter than control group statistical significance were P$lt;0.01 in body weight gain among the treatments used estrogen. 2. The weight of comb was significantly increased P$lt;0.01 in all treatments compared with the control. Testicle`s weights had no significant differences among treatments but in all treatments the weight of testicles compare with the control had decreased. 3. Liver weight showed significance with P$lt;0.01 among the groups. There was no significance among other groups except E₄ group. 4. There were no significant differences in the weight of heart and spleen. Weights of heart and spleen were slightly reduced by the hormone treatment. 5. In the weight of hypophsis, there was no difference in all tested groups. 6. Weight of gizzard showed the significance with P$lt;0.01 among the groups, and there was no significant differences among other groups except E₄ group. The weight of intestine was obviously increased P$lt;0.05 in all tested groups, and, its weight was increased in order of E₂ group, E₁ group, and E₄ group. 7. Dressing percentage showed the significance with P$lt;0.05 among the groups and were increased in order of E₂ group, E₃ group, E₁ group and E₄ group.

부록 : 한우 체외수정란이식에 의한 산자 생산

조헌조(H . J . Cho),김주현(J . H . Kim),송상현(S . H . Song) 경상대학교 농업생명과학연구원(구 축산진흥연구소) 2000 畜産振興硏究所報 Vol.27 No.1

한우 번식장해의 실태에 관한 조사연구

조헌조 ( H J Cho ),변명대 ( M D Byun ) 한국축산학회 1973 한국축산학회지 Vol.15 No.2

The 1400 Korean cows raised in the Kyung-buk area were investigated for the purpose of considering the current status of breeding and the incidence of .reproductive disorders. An extensive research survey was carried out for two years from flay 1970 to April 1972. The results obtained in this study can be summarized as follows: 1. The incidence of breeding difficulties were found in 112 examinations (8.0%). 2. The five most common abnormalities as for their sterility were as follows; (a) anestrus (39.1%) ; (b) persistence corpus luteum (23.0%) ; (c) silent heat (17.6%); (d) endometritis (17.6%); (e) cystic ovaries (2.7%). 3. Endometritis was found in abundance by 45.0% upon 4 years of age, and cystic ovaries in 66.7% at 5 years of age. 4. The status of breeding, among Korean cows examined un this survey were; 59.0% of pregnancy, 19.0% of uncertain pregnancy, physiological vacancy 14.0% and the incidence of reproductive disorders 8.0%. 5. The conception rate on the first mating was 52.1%, on the second mating 24.4% and on the third mating 12.1%. 6. Classified by the history of delivery; 96.5% of 1400 heads had the history of 1-4 delivery.

면양에 있어서 성장 및 산모량에 영향을 미치는 불변요인 효과에 관한 연구 1 . 오모량 ( 汚毛量 ) 에 대한 불변요인 효과 및 반복력 추정

조헌조(H . C . Cho),강대진(D . J . Kang),최광수(K . S . Choi),오대균(D . K . Oh) 한국축산학회 1987 한국축산학회지 Vol.29 No.12

The study was conducted to obtain some environmental and genetic information for sheep performance-testing, selection, and making quantitative statements about other experimental result in sheep. The environmental and genetic parameters estimated in the study were effects of some factors due to permanent differences on wool production and repeatabilities for wool production in sheep. The results were summarized as follows : 1. Significant (P$lt;0.01) differences were detected for greasy wool weights among ages of ewes at shearing. The effects of years of shearing were estimated -0.41∼0.40㎏ in Corriedale and -0.48∼0.44㎏ in Polwarth. The constant estimates of ages of ewes at shearing were -0.70 ㎏ in one year, -0.20 ㎏ in two-year and 0.32∼4.40㎏ in above-two year in Corriedale and -0.95㎏ in one-year, 0.13 ㎏ in two-year and 0.40^0.42 ㎏ in above two-year in Polwarth. 2. Estimate repeatabilities for greasy wool 0.74 in Corriedale, and 0.51 in Polwarth.

Estrogen 의 처리가 웅추의 발육과 장기중량에 미치는 영향

조헌조 ( H J Cho ),박양일 ( Y I Park ) 한국축산학회 1970 한국축산학회지 Vol.12 No.4

One hundred Demura line cockerels of 5 weeks old were alloted into 5 lots at random according to the level of estrogen injected (control: 0 IU, E1 : 5,000IU, E2 : 10,000IU, E3 : 15,000IU, E4 : 20,000IU). The body weight gain, chick mortality, dressing percentage and development of some organs in cockerels were observed through 5 weeks from July 12, 1970. Body weight gain of E3 or E4 was higher than that of control cockerels by 2.67% and 10.78 respectively. However, the lower dosage of estrogen reduced the body gain by 3.47% in E1 and 2.43% in E2, compared with the control cockerels. Ertrogen injection improved the dressing percentage of cockerels as follows; 64.9% in control, 67.2% in E1, 72.2% in E2, 68.2% in E3, 66.8% in E4. A marked decrease in the weight of comb and testis were observed. The weight of comb and testis in the cockerels of estrogen injection were only 1/3 to 1/5 of those in control cockerels. Liver and intestines of all the estrogen injection cockerels gizzard of E3 and E4 were larger and spleen of all the estrogen injection cockerels, pituitary gland of E1, E3, and E4, heart of E1, E2, E3 were smaller, compared with those of control cockerels.

면양에 있어서 성장 및 산모량에 영향을 미치는 불변요인효과에 관한 연구 2 . 생시체중 및 이유시 체중에 대한 품종간 교잡효과 및 이유시 체중에 대한 유전력 추정

조헌조(H . C . Cho),강대진(D . J . Kang),최광수(K . S . Choi),오대균(D . K . Oh),김영직(Y . J . Kim) 한국축산학회 1988 한국축산학회지 Vol.30 No.7

The data analyzed in the study were collected from the results of performance-testing on Corriedale, Polwarth, Romney Marsh and breed-crosses at the Namweon Branch of the National Animal Breeding Institute from January, 1980 to May, 1985. Theresultswere summarized as follows: 1. Mating systems affected significantly body weights at birth and weaning (P$lt;0.01). The least-squares means estimated for birth weight were. 3.72㎏ in pure bred Polwarth, 3.90Kg in Romney Marsh × Polwarth crossbred, 3.94㎏ in Pure bred Corriedale, 4.21㎏ in Romney Marsh × Corriedale crossed and 4.47㎏ in pure bred Romney Marsh; the corresponding for figures for weaning weights were 17.08㎏, 19.43㎏, 19.82㎏ and 20.97㎏, respectively. 2. Heritability estimates for weaning weight were 0.44±0.135 in corriedale and 0.41±0.204 in Polwarth.

지하수와 지표수가 병아리의 발육에 미치는 영향

조헌조 ( Hean Jo Cho ),변명대 ( Myung Dae Byun ) 한국축산학회 1972 한국축산학회지 Vol.14 No.1

This experiment was an attempt to know whether surface water and ground water affect the growth rate of chicken. One hundred and twenty chicken were divided into two groups supplied with surface water and ground water, respectively, for 8 weeks. The results were summarized as follows: (1) The chicken supplied with ground water showed significantly higher growth rate than did another group. (2) The amounts of average daily consumption of water and feed were not significantly different from each other. (3) Neither the surface water nor the ground water affected the mortality rate.

잠용분말의 첨가가 초생웅추의 발육에 미치는 영향

조헌조 ( H J Cho ),박양일 ( Y I Park ) 한국축산학회 1970 한국축산학회지 Vol.12 No.4

This experiment was carried out to investigate the dietary effects of Silkworm pupa powder on the growth, feed consumption and feed efficiency of chicks. Five different trials involving one hundred Demura male baby chicks, with five replications for each, were carried out for a period of 9 weeks from the day of hatching. For the experimental diets, 10% fish meal of the control diet was replacek with Silkworm pupa powder of 15, 20, 25 and 30% respectively. The results obtained from this study were summarized as follows: 1. As the level of Silkworm pupa powder supplementation increased, average daily gain and full body weight were increased significantly. 2. The amounts of feed consumed indicate no significant differences among the five treatment lots. As the level of Silkworm pupa powder dietary increased, feed intake rate was decreased. 3. The feed efficiency of the experimental groups was improved over the control group. Among the experimental groups, the higher the levels of Silkworm pupa powder added were resulted in better for the feed efficiency as well. 4. There was no influence of Silkworm pupa powder dietary supplementation level on the chicks mortality. 5. As the level of Silkworm pupa powder supplementation increased, feed cost for the body weight gain was decreased. 6. In the view point of cost analysis for experimental diets the treatment of P₃ lot was much superior to that of others treatment lot`s. 7. Based on the results of economical analysis of Silkworm pupa diets, the proper supplementation level appears to be the addition of 25% level replacing fish meal.

이앙전작 청예작물 재배에 관한 연구 1 . 이앙전작 청예 옥수수의 예취 시기가 후작 ( 수도작 ) 의 생육 및 수량에 미치는 영향

김기원,조헌조,이을희 ( Ki Won Kim,Cho Hyen Cho,Ell Hee Lee ) 한국축산학회 1979 한국축산학회지 Vol.21 No.4

This experiment was carried out to investigate the effect of the cutting stages on the yield of soiling corn (previous crop), and the characteristics and the yield of paddy rice (following crop) to set up the reasonable crop rotation system on following paddy field in she southern area. The results obtained were as follows: 1. The height of soiling corn was higher as the cutting stage was prolonged. 2. The highest yield (7,445 ㎏/10a) was in the plot cut on 23, June among cutting stages. The yield of the plot cut on 3, June was less then three plots cut 13 June, 23 June and 30 June, `There was no significant differences between two plots cut on 23 June and 30 June. 3. The highest dry matter yield(1388.91 ㎏/ l0a) was in the plot cut on 30 June of all. There were significant differences (p$lt;0.01) on the dry matter yield of each plot. It was increased as the growth stage was prolonged. 4. Rice growth (Milyang 15), following crop transplanted on 23 June, was no difference as compared with that of the common cultivation transplanted on 18 June. However, the same crop transplanted after June 23 was not grown well. 5. The highest rice yield (570.36㎏/l0a) was in the plot transplanted on 13 June the plot transplanted on 3 June produced more yield than two plots transplanted on 23 June and 18 June and(common cultivation)and the plots transplanted on 23 June and after 18 June were less than others in the rice yield. Therefore, it may be concluded that there was no difficulties on the production and the growth of rice cultivation after soiling corn cultivation when rice paddy was transplanted before 23 June in the southern area.