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.

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.

한우와 샤로레 교잡종 빈우의 성성숙과 성호르몬 수준 변화에 관한 연구

정영채,김창근,이근상,Chung Y. C.,Kim C. K.,Lee K. S. 대한수의사회 1982 대한수의사회지 Vol.18 No.7

한우와 Charolais와의 교잡종 빈우에 있어서 초발정일령과 체중 및 성장중의 혈중 LH, FSH prolactin, progesterone과 estradiol수준의 변화를 알고저 본 시험을 시도하였다. 공시된 빈우는 한우 4두와 교잡종$(F_1)$, 4두로서 NRC 사용표준에 따라 사료를 급여하였고 군사하였다. 체중은 출생일로부터 1개월 간격으로 16개월령까지 측정하였으며 13개월령까지 체중측정시마다 채혈한 다음 분리된 혈청내의 호르몬을 RIA로 분석하였다. 초발정일령은 유의성이 없었으나 교잡종이 한우보다 빨랐다($326.7{\pm}51.6$일과 $372.5{\pm}31.9$일) 초발정시 체중은 교잡종이 한우보다 월등히 (p<0.01) 무거웠다 ($223.0{\pm}16.6kg$과 $175.3{\pm}10.3kg$). 혈청내 LH와 FSH는 1두의 교잡종에서 출생시와 3개월령에서 높게 나타난 것을 제외하고는 전빈우의 전월령에서 본 시험에서의 호르몬분석한계수준(LH, $1.5mIU/m\ell$ : FSH, $1.2mIU/m\ell$) 이하였다. 혈청내 prolactin은 다른 월령에서 보다 $5\~8$개월령에서 더욱 높았고 $11\~12$개월령에서는 개체간 차이가 많았다. 혈청내 progesterone은 출생시는 낮았으며 그 후 $6\~8$개월령에서 높았고 8개월령 이후에서 $0.1\~0.2ng/m\ell$으로 다시 감소하였다. 혈청내 estradiol수준은 전빈우의 모든 월령에서 본 시험의 호르몬분석 한계수준$(10pg/m\ell)$ 이하였다. 성성숙동안에 LH, FSH와 estradiol의 수준이 낮았던 원인은 이들 호르몬의 상승을 측정하기에는 너무 채혈간격이 길었던 것으로 추측된다. This experiment was conducted to determine the age and weight at first estrus and to characterize the serum LH, FSH, prolactin, progesterone and estradiol during growth and puberty in Korean native heifers and Charolais x native crossbred heifers. Four pu

이원교잡종 및 삼원교잡종 돼지의 산자능력 비교

박창식,정선부,이근상,박영일 ( C . S . Park,S . B . Chung,K . S . Lee,Y . I . Park ) 한국축산학회 1981 한국축산학회지 Vol.23 No.4

The results of a crossbreeding experiment with a total of 315 litters of Berkshires, Hampshires, Durocs, Landraces, Large Whites; eight different two-breed crosses and twelve different three-breed crosses, produced at Livestock Experiment Station from 1975 through 1979, are summarized as follows. 1. Number born alive per litter was largest in the D♂×(Lw♂ × L♀) F₁♀ mating, followed by the D♂ × (H♂ × L♀) F₁♀ mating, and was smallest in the Hampshires. The pigs in the 3rd-6th parities had larger litter size at birth than those in other parities. 2. Birth weight of pig was heaviest in L♂ × Lw♀ mating and lightest in the Large White. The total litter weight at birth was heaviest in the D♂ × (Lw♂ × L♀) F₁♀ mating, followed by D♂ × (H♂ × L♀) F₁♀ and Lw♂ × L♀ mating, and was smaller in Hampshires and Berkshires. 3. Latter size at weaning was largest in the D♂× (Lw♂ × L♀) F₁♀ mating, followed by D♂× (H♂×L♀)F₁♀ and Lw♂ × L♀ matings, and was smaller in Durocs and Hampshires. The pigs in the 3rd-6th parities had larger litter size at weaning than those in other parities. 4. The total litter weight at weaning was heaviest in the D♂ × (Lw♂ × L♀) F₁♀mating, followed by H♂ × (Lw♂ × L♀) F₁♀ and Lw♂ × L♀ matings, and was lighter in Durocs and Hampshires. The weaning weight of pig was largest in D♂ × (Lw♂ × L♀) F₁♀ mating and lightest in L ♂ × H♀ mating. 5. Survival rate at weaning was hightest in L♂ × Lw ♀ mating, followed by D♂ × (L♂ × H♀) F₁♀ and D♂ × (H ♂ × I ♀) F₁♀ matings, and was lowest in Durocs. 6. The results obtained in this study suggest that the two-breed cross from Lw♂ × L ♀ mating, and the three-breed crosses from D♂× (Lw♂ × L♀) F₁♀ and D ♂ × (H♂× L♀) F₁♀ matings are superior crossbreds for reproductive performance.

한우 비육시 암모니아 처리 볏짚급여가 사료섭취 및 증체에 미치는 효과

신기준,이용호,이근상,김강식 ( K . J . Shin,Y . H . Lee,K . S . Lee,K . S . Kim ) 한국축산학회 1985 한국축산학회지 Vol.27 No.5

The effect of ammoniation treatment on the animal performance of rice straw was studied. The stacked rice straw was covered with polyethylene film and injected with 3% anhydrous ammonia (DM base of rice straw) and kept for eight weeks at the outdoor. The Korean Native Steers, average body weight of 285㎏, were fed all samely 1.5% concentrate of their body weight and each five of them were fed with untreated rice straw (U-RS) and NH₃ treated rice straw (NH3-RS), respectively. Average daily weight gain of steers fed NH₃-RS was significantly higher than that of steers fed U-RS (p$lt;0.05) and DMI ㎏/day and DMI g/W^(0.75) of steers fed NH₃-RS was significantly greater than that of steers fed U-RS. But feed ㎏/gain was not so significantly affected by NH₃ treatment, however the trends was apparently decreased.

Orchardgrass 및 Ladino clover 의 다른 파종화율이 혼파초지의 수량 및 식생구성율에 미치는 영향

김동암 ( D A Kim ),이근상 ( K S Lee ),이광직 ( K J Lee ),이종렬 ( J Y Lee ) 한국축산학회 1973 한국축산학회지 Vol.15 No.1

An experiment was conducted during the 3-year period 1967-1969 at the Livestock Experiment. Station, Sunghwan, to determine the effect of different seeding rates of Orchardgrass (Dactylic glomerata) and Ladino clover (Trifolium repens L. $quot;Yar. Ladino$quot;) on the total dry matter yield and botanical composition of pasture mixtures. The results are as follows: 1. High seeding rates of 2㎏ to 3㎏ of grass with 0.3㎏ to 0.5㎏ of clover per 10a reduced the percentage establishment of viable seed sown. However no differences were found in tillers per plant between seeding rates in grass and clover. 2. Botanical compositions of grass and clover 50 days after sowing were closely related to the seeding rates. For 2-years following seeding, however, the seeding rates of grass and clover had no any appreciable effect on the botanical composition of pasture species. 3. Different seeding rates of grass and clover had no significant influence on the total air dry matter yield of pasture mixtures in subsequent years. As the results of the experiment, a seeding rate of 1㎏ of orchardgrass with 0.1㎏ of ladino clover per 10a would be the most reasonable basic seed mixture under our conditions.

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.

육돈생산을 위한 우량교배조합 선발시험

박창식,정선부,김희석,이근상,박영일 ( C . S . Park,S . B . Chung,H . S . Kim,K . S . Lee,Y . I . Park ) 한국축산학회 1980 한국축산학회지 Vol.22 No.3

The results of a crossbreeding experiment with a total of 315 pigs of Berkshires, Hampshires, Durocs, Landraces, Large Whites, seven different twobreed crosses and twelve different three-breed crosses, produced at Livestock Experiment Station from 1975 through 1979, are summarized as follows. 1. The three-breed cross from D♂×(H♂×L♀) F₁♀ mating had the highest average daily gain and lowest feed requirement per unit gain, followed by the D♂×(Lw♂×L♀) F₁and H♂×(Lw♂×L♀) F₁♀ matings. The Berkshires and Landraces ranked lowest among the 24 mating groups compared for both of the traits. Males had higher average daily gain than females by about 0.06㎏ and had lower feed requirement by about 0.14. 2 . The three-breed crosses from D♂×(H♂×L♀) F₁♀, D♂×(Lw♂×L♀) F₁♀ and H♂×(Lw♂×L♀) F₁♀ matings reached 90㎏ body weight at younger age than the other groups. The D♂×(H♂×L♀) F₁♀ group reached 90㎏ at younger age than the Landrace by 39 days. The effects of the mating group, year, season and sex were statistically significant for the average daily gain, feed requirement and age at 90㎏ body weight. 3. The dressing percentage and lean meat percentage tended to be higher in H♂×(Lw♂×L♀) F₁♀, H♂×L♀ and H♂×B♀ matings compared to the other mating groups. The effects of the mating group and season were statistically significant, but the effects of the year and sex were not significant. 4. The loin-eye area was largest in the Kw♂×L♀ mating and smallest in the B♂×L♀ mating. Males had higher dressing percentage, higher lean meat percentage and loin-eye area than females. 5. The backfat was thinnest in purebred Hampshire and was thickest in B♂×L♀mating. The effects of the mating group and year were significant, but the effects of the season and sex were not significant. 6. The results obtained in the study suggest that the three-breed crosses from D♂×(H♂×L♀) F₁♀, D♂×(Lw♂×L♀) F₁♀ and H♂×(Lw♂×L♀) F₁♀ matings are superior crossbreds for pork production.

소에 있어서 다배란 유기에 영향을 미치는 요인에 관한 연구

김희석,김영진,이종문,이근상,정길생 ( H . S . Kim,Y . J . Kim,J . M . Lee,K . S . Lee,K . S . Chung ) 한국축산학회 1985 한국축산학회지 Vol.27 No.4

These experiment were conducted to investigate the effects of the kinds and dosages of gonadotropins, breed, parity, body weight, season, milk yield and serum total cholesterol (T-CHO) levels on ovarian responses in superovulated cattle. The number of follicles and corpus luteum (CL) per head in superovulated cattle were 6.6±080 and 4.8±0.72. Superovulation with FSH resulted in ovarian response more than that of PMSG and the best ovarian response in parity, body weight and season was showed in heifer, 350-450㎏ and autumn, respectively. In the calving-superovulation interval, below 5 month was showed poor ovarian response. In the lactating dairy cows, the best ovarian response was showed in below 15㎏/day of milk yield and decreased as milk yield increased. In the serum T-CHO levels, the best result was obtained from more than 150㎎/100㎖ and the ovarian response increased as the serum T-CHO levels increased.