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젖소에 있어서 성장호르몬 ( BST ) 투여가 산유량 , 혈청내 BST 농도 및 우유내 BST 농도에 미치는 영향
권관(K . Kwon),정흥우(H . W . Chung),주종철(J . C . Joo) 한국축산학회 1991 한국축산학회지 Vol.33 No.10
This study was carried out to investigate the effect of BST treatment on milk production. and BST concentration in serum and milk of Holstein cows. The data used in this study were obtained in 9 Holstein cows. The results obtained in this study are summarized as follows ; 1. Milk yield of BST group was higher by 8.6% than that of controls. 2. Least-squares means of milk yield significantly differed between BST group and controls from 2 to 15 days after BST treatment(p$lt;0.05). but did not differ after 16 days. 3. Serum BST concentration of BST group was significantly higher than that of controls until 8 days after teatment(p$lt;0.05). but was not higher after 12 days. 4. BST concentration in milk did not significantly differ between BST group and controls.
서경덕(K . D . Seo),권관(K . Kwon),한기영(K . Y . Han),김선균(S . K . Kim) 한국축산학회 1989 한국축산학회지 Vol.31 No.5
The silver fox. a seasonal breeder of great economic importance, has a low reproductive efficiency in Korea. This study was carried out to obtain the basic data about the reproductive physiology of the silver fox being raised in Korea. A total of 135 litter in 1987, of which 83 were raised at Taekwanryung (N: 38.5°, E:128.8°),52 were at Yangsan (N:35.5°, E:129.0°), were used for this study. The vixens breeding started on January 27 and continued until March 25. The mode and mean was March 5 with an standard deviation of 18 days for vixens raised at Taekwanryung, while the breeding of vixens raised at Yangsan began February 16 with a standard deviation of 11 days. The mean date for mating of yearling was about a fortnight later them that of vixens of two and more than two of age which were all raised in two areas. The linear model was used to measure the effect of raising region, parity and the date of mating on litter size. The mean litters were 4.78±0.14 kits. The difference in litter size among 2 raising area, 2 parities and 4 dates of mating was not significant. However, the vixens raised in southern area, having the first parity and mating between March 1 and March 15 had more kits per litter than in the northern area, the 2nd parity and the other dates of mating.
구리 공급원과 첨가수준이 이유자돈의 생산성에 미치는 영향
김윤기(Y . K . Kim),백인기(I . K . Paik),권관(K . Kwon) 한국축산학회 1991 한국축산학회지 Vol.33 No.11
An experiment was conducted to study the effects of different sources and levels of copper on the performance of weanling pigs. For a 6-wk feeding trial, 128 3-way crossbred weanling pigs(BW 11-13.5kg) were randomly distributed into 16 groups of 8 heads(4 male and 4 female) each. Four groups were allotted on one of the following 4 dietary treatments: non-supplemented diet(control), diet supplemented with 200ppm of Cu from CuSO₄·H₂O(CuSO₄-200). diet supplemented with 63.5ppm of Cu from sequestered mineral copper (SQM-Cu-63.5) and SQM-Cu-127. Results showed that weight gain and feed efficiency for the first 2 wks were sign significantly(p$lt;0.05) greater in CuSO₄-200 and SQM-Cu-63.5 groups than in control groups. Six wk average of weight gain and feed efficiency were not significantly different among treatments although SQM-Cu-127 showed the highest and the control showed the lowest performance. Moisture content of feces tended to be high in CuSO₄-200 groups. Copper content in feces significantly(p$lt;0.01) increased as the level of copper in the diet increased. Fecal color of Cu supplemented groups were appreciably different from that of control.
이유자돈 및 육성비육돈사료에 있어서 L - lysine 의 첨가에 의한 단백질 절약효과
한인규,권관,나기현,유문일 ( In K . Han,K . Kwon,Ki H . Ra,Moon I . Yoo ) 한국축산학회 1978 한국축산학회지 Vol.20 No.6
In order to study the protein sparing effect of l-lysine from weanling pig to market weight, a series of feeding and metabolism trials was conducted. In experiment 1, a total of 192 three way crossbred pigs (Landrace x Large White x Duroc) weighing app. 10 ㎏ initially were used for four weeks to determine the effect of supplemental lysine when added to a low protein diets. In experiment 2, a total of 120 three way crossbred pigs were used for 11 weeks from 28 ㎏ to 90 ㎏. The results obtained are as follows: (1) It was found that the dietary protein level of 18% fed during period of 10 to 23㎏ was adequate for the daily gain and feed efficiency. Pigs fed the dietary protein level of 20% were not different in rate of gain and teed efficiency with pigs fed the dietary protein level of 18%. When pig were fed the dietary protein level of 16% + 0.2% l-lysine, rate of gain was similar to pigs fed the dietary protein level of 18%, but feed efficiency was slightly improved, In economic analysis, feed cost required per ㎏. of body weight gain was less for pigs fed the dietary protein level of 16% + 0.2% l-lysine than other levels. Therefore, it was apparent that weanling pig diets supplemented with 0.2% l-lysine was able to spare 2% of dietary protein. (2) The dietary protein level of 16% was adequate for growing pigs from 28 to 53 ㎏. Rate of gain and feed efficiency of pigs fed the dietary protein level of 14% + 0.2% l-lysine was similar to pigs fed dietary protein level of 16%.There were no difference in digestibility and nitrogen retention of diets supplemented with 0.2% l-lysine with other dietary protein level. Therefore, diets supplemented with 0.2% l-lysine could spare 2% of dietary protein for the growers. (3) The dietary protein level of 14% was adequate for finishing pigs from 53 to 90 ㎏. In the rate of gain, pig fed the dietary protein level of 12% supplemented with 0.2% l-lysine was slightly higher, but improved effect in rate of gain during finishing period was somewhat lower than growing period. However, improvement in feed efficiency during finishing period for l-lysine fed group was more remarkable than in rate of gain. Digestibility and nitrogen retention of diets by adding 0.2% l-lysine were not affected. (4) Although there was no significant difference, dressing percentage and back fat thickness was slightly increased, and loin aye area was slightly decreased when pigs were fed dietary protein level of 14% supplemented with 0.2% l-lysine from 28 to 53 ㎏ and 12% supplemented with 0.2% l-lysine from 53 to 90 ㎏. (5) In economic analysis feed cost required per ㎏ of body weight gain for pig fed the dietary protein level of 14-12% supplemented with 0.2% l-lysine was less than that for those fed the other dietary proten levels. Based on the above mentioned results, it may be concluded that adequate level of dietary protein for weanling-growing-finishing pig would be 18-16-14%. It would also be clear that supplementation of l-lysine at 0.2% level in the pig rations from weanling to market weight might be able to spare 2% of dietary protein.
육성비육돈에 대한 Virginiamycin 의 성장촉진효과
유문일,한인규,권관,손광수,강세원 ( M . I . Yoo,I . K . Han,K . Kwon,K . S . Sohn,S . W . Kang ) 한국축산학회 1985 한국축산학회지 Vol.27 No.5
This experiment was conducted to compare the growth promoting effect of virginiamycin with some other antibiotics available in Korea for growing-finishing swine. A total of 288 three way crossed hogs (LW × L × D or H) weighing an average 16 ㎏ were used in six treatments, consisting of control, virginiamycin (40ppm), flavomycin(10ppm), bacitracin(100 ppm), virginiamycin(20ppm) + colistine(4ppm) and Bacitracin(20ppm) + colistin(4ppm) groups, for a period of 114 days. Daily weight gain of virginiamycin fed group was considerably (p$lt;0.05) better than that of control group. However, there were no statistical differences among hogs fed different antibiotics. Feed intake as not affected by the addition of antibiotics. Feed efficiency of virginiamycin group was superior to that or control group, although no statistical differences were found among treatments. It seemed that hogs fed antibiotics utilized the dry matter, crude protein and crude fiber more efficiently than those fed control diet, without any significant differences among antibiotics fed groups. Digestible energy values and energy utilizability of antibiotics fed groups were better than those of control group.
육성돈에 대한 Mecadox 의 단백질절약 및 성장촉진효과
한인규,유문일,권관 ( In K . Han,Moon I . Yoo,K . Kwon ) 한국축산학회 1979 한국축산학회지 Vol.21 No.6
In order to study the protein sparing and growth promoting effect of mecadox for growing pigs, a total of 160 three way crossbred pigs (Landrace x Duroc x Large White) weighing approximately 11 ㎏ initially were used for a period of 12 weeks of feeding trial and metabolism trial. Experimental diets of two different level of dietary protein (high-19% or low-17% for weaned pig and high -17% or low-15% for growers) were fed with (50 ppm) or without (0 ppm) mecadox (carbodox : methyl- 3 - (2 -quinoxalinylmethylene carbazate-N¹, N⁴-dioxide)). (1) Although there was no statistically difference, pigs fed diets with 50 ppm of mecadox gained faster and more efficient than pigs fed unsupplemented diets regardless of protein level in the diet. Pigs fed the high protein level supplemented with mecadox resulted in best effects of gain and feed efficiency. (2) Rate of gain and feed efficiency of pigs fed the high dietary protein level of 19 % in weaning diet. and 17% in grower ration unsupplemented with mecadox were similar to pigs fed the low dietary protein level of 17% in weaning ration and 15% in grower ration supplemented with mecadox. The growth promoting effect of mecadox was remarkable for younger pigs than growers. (3) Digestibility of crude protein and crude fat was slightly improved and that of crude fiber was decreased when mecadox was added to growing diets. It was apparent that nitrogen retention rate of pigs receiving mecadox was slightly higher than unsupplemenred pigs. Based on the above results, it may be concluded that the addition of mecadox at 50 ppm level could improve the growth rate and feed efficiency from weanling pig to growing pig and that mecadox might have protein sparing effect up to 2% of total dietary protein for growing pigs.