한우와 샤로레교잡에 의한 신종한우육성 연구 2 . 사양형태별 한우와 샤로레 1 대잡종 발육과 번식능력 비교

이근상,나기준,김희석,윤철준 ( K . S . Lee,K . J . Na,H . S . Kim,C . J . Yun ) 한국축산학회 1985 한국축산학회지 Vol.27 No.4

This study was carried out to investigate the growth rate, the age and body weight at puberty during the growing period in Korean native cattle (K) and Charolais crossbreed (CK). 14 Korean native bulls or heifers and 14 CK were alloted to two nutritional levels (Standard level and Low level groups based on the NRC) during the experimental period. The growth rate of CK was 28%-55% faster n bulls and 33%-26% in heifers than that of K (P$lt;0.01). The feed efficiency of CK was 6%-10% less in bulls and 12%-8% in heifers than that of K. The dressing percent was 60.5-61.9% in CK and 56.7-59.9% in K. The age at puberty was different between regimes (P$lt;0.05) and the average body weight at puberty was the same between breeds (P$lt;0.05).

Charolais 종 유전형질도입이 한우및 Charolais 교잡종들의 체중과 체형에 미치는 영향

나기준,이근상,오선균,김내수 ( K . J . Na,K . S . Lee,S . K . Oh,N . S . Kim ) 한국축산학회 1986 한국축산학회지 Vol.28 No.11

This experiment was carried out to develop the new synthetic breed (5/8 Charolais 3/8 Hanwoo with the importation of Charolais traits to Hanwoo. The mating and environmental effects on the body weights and body measurements of Hanwoo (K), Charolais first crossbred (F₁), Charolais backcross (B₁) and synthetic breed (S) at 3, 6, 12, 18 and 36 months of age on farm feeding from 1979 to 1985 were estimated by least squares method. The results obtained were summarized as follows; 1. The mating system showed a highly significant effect on body weights and body measurements of K, F₁, B₁ and S. The average body weights and standard errors of K, F₁, B₁ and S were 84.0±3.28㎏, 119.6±1.48㎏, 124.0±2.41㎏ and 116.1±3.60㎏ at 3 months, 147.1±4.00㎏, 195.4±1.91㎏, 201.7±3.61㎏ and 186.2±5.61㎏ at 6 months, 270.8±4.87㎏, 354.8±3.09㎏, 357.0±5.68㎏ and 322.7±11.16㎏ at 12 months, 379.3±5.64㎏, 468.8±4.57㎏ and 477.3±9.04㎏ at 18 months, 448.1±11.04㎏, 513.4±10.23㎏ and 501.4±17.99㎏ at 36 months of age. The Charolais crossbreds were weighed 38-42%, 27-37%, 19-32%, 24-26% and 12-15%. heavier in body weights and also greater in body measurements than those of Hanwoo at 3, 6, 12, 18 and 36 months of age (P$lt;0.01). 2. The effect of calving years had a significant on both traits. Even though the values of body weights and measurements of the calves calved at summer period were greater than those of other seasons, the effect was not significant among months of age. The sex effect on the body weights and body measurements had a significant effect except 3 months of age.

한우와 샤로레교잡에 의한 신종한우육성 연구 1 . 농가사육상태하에서의 한우와 샤로레교잡종의 발육및 번식능력 비교

나기준,이근상,김희석,김강식 ( K . J . Na,K . S . Lee,H . S . Kim,K . S . Kim ) 한국축산학회 1985 한국축산학회지 Vol.27 No.4

This experiment was carried out to compare the growth rates and reproductive traits between Korean native cattle and Charolais crossbreeds. The results obtained were summarized as follows: The body weight of Charolais crossbreed (CK) was 41, 39, 44, 29% heavier at the age of 3, 6, 12 and 18 months than that of Korean native cattle(K) on the farm performance and was 26, 47, 58, 51% heavier on the station performance test(S.P.T). In the Charolais back-crossbreed (CCK) was S5, 44, 46, 40% heavier on the farm performance and 50, 49, 69, 55% on S.P.T. Body measurement of the crossbreeds was taller, wider and longer than that of K. Age and body weight at puberty of the crossbreeds was earlier and heavier than that of K. The type of parturition of Charolais crossbreeds was 92.6% in normal and 7.4% in abnormal in CK, and 94%, 6,0% in CCK, respectively.

돼지의 繁殖形質에 對한 雜種强勢効果 推定

S.B. CHUNG(鄭船富),K.S. LEE(李根常),M.Y. LEE(李主演),J.K. LEE(李正九) 한국육종학회 1983 한국육종학회지 Vol.15 No.1

To investigate heterosis and environmental effects in the reproductive traits of swine, a total of 1,010 litters (359 purebreds, 544 two-way crossbreds and 107 three-way crossbreds) were farrowed from gilts and sows of Duroc, Landrace, Yorkshire and Hampshire. The litters were farrowed from January 1980 to December 1981. The average individual heterosis (hI) was -5.51% for pig weight at birth, -2.20% for pig weight at 21 days of age, 9.06% for litter size at birth, 7.81 for litter size at 21 days of age and -0.18% for percentage survival. The average maternal heterosis (hm) was 3.10% for pig weight at birth, 3.59% for pig weight at 21 days of age, 6.20% for litter size at birth, 9.21% for litter size at 21 days of age and 2.72% for percentage survival. The heterosis effect of purebred vs. three-way crossbred was -2.41% for pig. weight at birth, 1.39% for pig weight at 21 days of age, 15.26% for litter size at birth, 17.02% for litter size at 21 days of age and 2.54% for percentage survival. The environmental effects of the season and the parity were significant in pig weight at birth showed the high effect in the Spring and Summer. But the pig weight at 21 days of age revealed the low effect in the Summer. In the effect of parity, the pig weight at birth and at 21 days of age were very low in the first and more than the 5th parity.

시비량 및 예취시기가 Russian Comfrey ( Symphtum peregrium )의 영양성분 및 수량에 미치는 영향

이근상 ( K S Lee ),채영석 ( Y S Choi ) 한국축산학회 1967 한국축산학회지 Vol.9 No.1

This experiment was Carried out to determine the effect of amount of fertilizer applied and cutting dates on the growing characters, yield and chemical composition of Russian Comfrey, and to evaluate the adaptability under our conditions. The Result obtained are as follows: 1. Russion comfrey can be cut three times during planting year, while during second year it can be cut seven times from the end of April to October. 2. It was observed that length of plant and size, of leaf during midsummer was more longer and larger than spring and autumn, and emergence of bolting was found more on May than any other months. 3. Yield of Russion Comfrey was less during planting year than second year(8,000 ㎏/10a). In seasonal distribution of green yield, it was found the Russian Comfrey was more yielded during midsummer than spring and autumn. 4. Chemical Composition of Russian Comfrey is as following; $lt;표생략$gt; 5. It was indicated that the effect of manure as a fertilizer was more obvious than comercial fertilizer. As the result of experiment it is concluded that the Russian Comfrey is a well adaptable forage crop under our condition and hoped it is a good forage crop for farm animals.

암모니아 처리 볏짚의 반추 가축에 대한 급여 효과 1 . 볏짚에 대한 암모니아처리 수준이 면양의 섭취량과 소화율및 질소 축적에 미치는 영향

신기준(K . J . Shin),이봉덕(B . D . Lee),배동호(D . H . Bae),차영호(Y . H . Cha),이근상(G . S . Lee),김강식(K . S . Kim) 한국축산학회 1989 한국축산학회지 Vol.31 No.7

A digestion trial was carried out to evaluate the effectiveness of various levels of NH₃ treatment on the feed value of rice straw and to decide the optimum level of NH₃ treatment. Twenty four castrated Corridale sheep were randomly allotted to six treatments (0, l, 2, 3, 4 and 5% of NH₃ to air dried rice straw on weight basis), four heads(repelicates) per treatment. The results obtained were summarized as follows: 1. The NH₃ treatment markedly increased the N content of rice straw. The NDF content appeared to be decreased by the treatment. 2. The consumption of rice straw trend to be increased by ammoniation and significant(p≤ 0.05) increase was noted when the level of NH₃ was 5%. 3. Digestibility of DM increased sign ificantly(p≤0.05) when NH₃ treatment level was over 3%, while those of OM, NDF, GE over 2% and that of crude protein wash increased by and 2% NH₃ treatment, but not by over 3% of NH₃ treatment. 4. Digestibilities of DM, OM, NDF, GE slightly decreased at the NH₃ level of 5%. 5. Nitrogen retention increased significantly(p≤0.05) by ammoniation, while nitrogen retention rate increased until NH₃ treatment level of 3% but decreased when the NH₃ treatment level was over 3%. In conclusion, the NH₃ treatment increased rice straw consumption by sheep and improved digestibities of DM, NDF, crude protein and GE, thereby improving feed value. The optimum level of NH₃ treatment of rice straw seems to be 3-4% of rice straw on the basis of air-dried weight.

한우와 육우교잡종에 대한 산육 및 사료이용성에 관한 연구

홍성구(S . K . Hong),나기준(K . J . Na),이근상(K . S . Lee),김내수(N . S . Kim),이택원(T . W . Lee) 한국축산학회 1988 한국축산학회지 Vol.30 No.1

This study was carried out to investigate the growth rate, feed efficiency and carcass traits of Korean native cattle (KK), and it`s crossbreedsive Simmental carssbreed (SK), Brown Swiss crossbreed (BK) and Japanese brown crossbreed (JK) at livestock experiment station from 1979 to 1986. The effects of the mating system, year of birth and season of birth on the body weights at 6, 9, 12, 15 and 18 months of age, on the nutrient intakes at the different months of age and on the carcass traits were estimated by least squares method. Breed groups were consisted of 12 calves; of KK, 6 calves of SK, 8 calves of BK and 5 calves of JK. 1. Growth capacity The average body weights of KK, SK BK and JK were 97.1±16.4㎏, 182.8±11.5㎏, 191.8±14.0㎏ and 127.9±15.4㎏ at 6 months (P$lt;0.05), 169.0±20.9㎏, 289.4±14.7㎏, 277.7±17.8㎏ and 223.8±19.6㎏ at 9 months, 242.7±29.7㎏, 424.7±20.9㎏, 386.3±25.3㎏ and 329.4±27.9㎏ at 12 months, 343.0±31.7㎏, 527.3±22.3㎏, 495.0±27.1㎏ and 410.8±29.8㎏ at 15 months, 421.6±32.9㎏, 625.7±23.1㎏, 573.3±28.1㎏ and 497.4±31.0㎏ at 18 months of age, respectively (P$lt;0.01). The average daily gains of KK, SK, BK and JK were 0.90±0.06㎏, 1.23±.004㎏, 1.06±0.05㎏ and 1.03±0.06㎏, respectively (P$lt;0.01). 2. Feed efficiency D.M. requirements per ㎏ gain of KK, SK, BK and JK were 6.48±0.30㎏, 6.50±0.25㎏, 7.52±0.30㎏ and 6.43±0.33㎏, respectively (P$lt;0.05). The average amounts of C.P, requirement per ㎏ gain of KK, SK, BK and JK were 1.03±0.05㎏, 1.06±0.04㎏, 1.23±0.05㎏ and 1.00±0.05{{ }}㎏, respectively (P$lt;0.05). 3. Carcass traits The average carcass percentages of KK, SK, BK and JK were 60.1±1.3%, 62.2±1.0%, 61.4±1.2% and 60.6±1.2%, and the average lean meat percentages of KK, SK, BK and JK were 44.3±1.2%, 46.4±0.9%, 43.3±1.1% and 43.4±1.0%, respectively. There were no significant differences among breed groups in carcass and lean meat percentage.

알팔파의 사료가치 연구 2 . 배합사료내 알팔파 펠렛의 혼합비율이 한우의 증체량과 사료이용성에 미치는 영향

김강식(K . S . Kim),신기준(K . J . Shin),백봉현(B . H . Baek),이근상(K . S . Lee) 한국축산학회 1990 한국축산학회지 Vol.32 No.10

Alfalfa pellet(AP) was mixed at various levels(0, 10, 20 and 30% as ADM base) in the concentrate for the evaluation of effects on the performance of fattening bulls. Twenty Korean native bulls(KNB) were randomly allotted to four treatments: l) concentrate + 0% AP, 2) concentrate + 10% AP, 3) concentrate + 20% AP, 4) concentrate + 30% AP, five heads(replicates) per treatment. After substitution of alfalfa pellet for mainly corn, crude protein and TDN of each experimental concentrate was almost equalized by the supplements of urea and tallow except treatment(4). The amounts of concentrate offered daily was 2% of body weight and rice straw was fed ad libitum except treatment(4), which limited to 0.5kg daily. After 150 days of feeding trial, carcass data were obtained. Results obtained were summarized as follows. 1. Although not significant daily gain increased slightly by feeding concentrate + 20% AP but when fed concentrate + 30% AP daily gain was lower than that when fed concentrate + 20% AP and symptom of bloat was occationally found. 2. Carcass rate increased significantly(p $lt;0.05) by feeding concentrate + 10% AP, but there was no significant differences among the treatments of alfalfa pellet mixed to different levels. Rate of retailed cuts showed no significant differences among the treatments. 3. There were no significant differences of concentrate and roughage daily consumption among the treatments. 4. There were not significant differences in required concentrate, rice straw and crude protein amount per unit gain but there were decreasing trends in concentrate and crude protein requirements when fed concentrate + 20% AP. TDN requirement decreased slightly when the level of alfalfa pellet mixed in concentrate increased, but the significant difference was noted when fed concentrate + 30% AP(p $lt;0.05). 5. Concentrate price increased as the level of alfalfa pellet mixed in concentrate increased but the incomes from feeding the concentrate mixed with alfalfa pellet increased until that level increased to 20%.

한우와 Charolais 교잡종의 체중과 체위간의 표현형 상관추정 연구

나기준(K . J . Na),이근상(K . S . Lee),오선균(S . K . Oh),김내수(N . S . Kim) 한국축산학회 1987 한국축산학회지 Vol.29 No.8

This experiment was carried out to develop the new synthetic breed (5/8 Charolais 3/8 Korean native cattle) with the importation of Charolais traits to Korean native cattle from 1979 to 1985. The phenotypic correlations between body weights and measurements of Korean native cattle (K), Charolais first crossbreed (F₁), Charolais back crossbreed (F₂) and Synthetic breed (S) at 3 and 12 months of age were estimated. The results obtained were summarized as follows 1. The phenotypic correlation coefficients of each breed between body weights and measurements were positive. 2. The chest girth was the most highly correlated with body weights in each breed. 3. The ranges of correlation coefficients between body weights and chest girth of K, F₁, B₁ and S at 3 and 12 months of age were 0.673-0.894, 0.72a-0.936, 0.472-0.897 and 0.601-0.921, respectively.

한우 육성 및 비육기 영양수준이 발육 , 사료이용성 및 도체 조성에 미치는 영향

김강식(K . S . Kim),신기준(K . J . Shin),백봉현(B . H . Paek),김용곤(Y . G . Kim),이근상(G . S . Lee),권순기(S . K . Kwon) 한국축산학회 1987 한국축산학회지 Vol.29 No.4

To evaluate the effect of feeding level on daily gain, feed efficiency and carcass composition, high (H: DCP and TDN was supplied for 1.1㎏ daily gain × 1.1) and low (L: DCP and TDN was supplied for 0.6㎏ daily gain × 1.1) level nutrient were fed to each 12 heads of Korean native bulls (KNB) for the 1st period (body weight from about 120㎏ to 300㎏), and thereafter during 2nd period 12 heads were devided into two groups and fed with H and L-feeding level until animals weighted about 500㎏. 1. Daily gain was significantly increased (P$lt;0.05) and the feeding period was significantly decreased when fed with H level. Shifting feeding level (H→L or L→H) did not affect the daily gain during whole period although there was a trend that H level during 1st period was more efficient than L level. 2. Dry matter intake was higher with H level than with L level. 3. DCP efficiency was better when fed with L level. The efficiency of L→H level was lower than that of H→L level during whole period but was better than that of H→H level during the early phase of 2nd period. 4. TDN efficiency was not influenced by the feeding level. However, TDN efficiency of H group was slightly better than that of L group during the 1st period. 5. Dressing percentage was significantly increased when fed with H level during the 2nd period. Fat content was significantly increased when fed with H→H level, while there was no significant differences among H→L, L→H, L→L feeding levels. There was no significant differences in retailed cuts between the feeding levels. 6. Carcass price was higher and feed cost was lower when fed with L level during the 2nd period. The monthly income per head was higher when fed with H level during the 1st period, although there was no big differences between H→H and L→H feeding level.