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미생물 Phytase 의 첨가가 육성돈과 비육돈의 성장에 미치는 효과
권관,정흥우,권찬호,유문일,현영,손광수,박승춘 한국축산학회 1999 한국축산학회지 Vol.41 No.6
This experiment was conducted to determine the effects of domestically developed microbial phytase on growth performance, nutrients utilization, and phosphorus excretion in growing and finishing pigs. The dietary treatments were: 1) 100% level of NRC requirement for calcium and phosphorus(C), 2) 80% level of NRC requirement for calcium and phosphorus(P0), 3) diet 2) supplemented with 500 PU of domestic phytase(P500) and 4) diet 2) supplemented with 700PU of domestic phytase(P700). A total 96 growing pigs(Landrace X Large White X Duroc) weighing average of 32±3㎏ of initial body weight were assigned to 4 treatments with 3 replications per treatment, 8 pigs in each replication. Growing pig fed the lower calcium and phosphorus diets containing 80% of NRC requirement tended to have lower weight gain and poorer feed efficiency as compared to those fed other diets. Although phytase treatments(P500 and P700) showed weight gain and feed efficiency similar to those fed control diet, there were no significant differences among the treatments in growing pigs. Slightly different results were obtained in digestibility of dry matter and crude protein and in excretion of phosphorus, but no significant differences were observed among the treatments and between supplemental levels of phytase. A total of 120 finishing pigs weighing on average 70.4±4㎏ were assigned to 4 treatments with 3 replications per treatment, 10 pigs in each replication. The feed efficiency in treatment P0 was poorer than that of other treatments. By supplementation of phytase to P0, the feed efficiency tended to be increased to the levels similar to control(C). However, no significant differences were observed among the treatments and between supplemental phytase levels. The digestibility of crude protein and phosphorus were lowest(P$lt;0.05) in treatment P0 while the excretion of phosphorus was not significantly different between the two phytase levels. The excretion of phosphorus in P500 was lowest(P$lt; 0.05) with no difference between the two levels of phytase.
Porcine Somatotropin(pST)이 비육돈의 성장생산성과 육질에 미치는 영향
권관,정정수,정연후,제훈성 한국축산학회 1995 한국축산학회지 Vol.37 No.6
The effects of porcine somatotropin(pST) on the growth performance and meat quality were investigated in the finishing pigs. Fourteen crossbred barrows weighing 60.4㎏ were allotted to either the control or pST group. The control group received no injection and pST group was injected daily for 41 days with 100㎍ of locally produced recombinant pST/㎏ BW. Administration of pST increased average daily gain by 15%(P$lt;0.05) and improved feed efficiency by 24%(P$lt;0.01). compared to control group. Feed consumption was reduced in pST group by 10%(P$lt;0.05), Four pigs from each treatment were slaughtered to measure carcass traits and meat quality. pST increased loin eye area (P$lt;0.11) and decreased backfat thickness by 19%(P$lt;0.05). There were no differences in texture, color, tenderness, juiciness and flavor of pork between control and pST group.
젖소에 있어서 성장호르몬 ( BST ) 투여가 산유량 , 혈청내 BST 농도 및 우유내 BST 농도에 미치는 영향
권관(K . Kwon),정흥우(H . W . Chung),주종철(J . C . Joo) 한국축산학회 1991 한국축산학회지 Vol.33 No.10
This study was carried out to investigate the effect of BST treatment on milk production. and BST concentration in serum and milk of Holstein cows. The data used in this study were obtained in 9 Holstein cows. The results obtained in this study are summarized as follows ; 1. Milk yield of BST group was higher by 8.6% than that of controls. 2. Least-squares means of milk yield significantly differed between BST group and controls from 2 to 15 days after BST treatment(p$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$lt;0.05). but was not higher after 12 days. 4. BST concentration in milk did not significantly differ between BST group and controls.
옥수수 - 대두박 위주의 사료내 Phytase 의 첨가가 산란계의 생산 , 영양소 이용율 및 인 배설량에 미치는 영향
한인규,권관,손광수,신인수,권찬호,김진동 한국축산학회 1995 한국축산학회지 Vol.37 No.5
This study was carried out to evaluate the effect, of phytase on egg production, nutrient utilization and phosphorus excretion of laying hens follow P diet. Com-wheat-soy diets containing 100% (C). 90% (P90) and 80% (P80) of the available phosphorus recommended by NRC (1994) were formulated for laying hens. Two additional diets were prepared by adding 500 FTU (One unit of phytasc (-FTU) is defined as the quantity of enzyme which liberates I micromole of inorganic phosphoms per minute from 0.0015 ㏖/ℓ sodium phytate at pH 5.5 and 37℃ of phytae (Altech Co.) to the diets with 90% (P90E) and 80% (P80E) of the available phosphoms recommended by the NRC (1994). A total of 400 laying hens (36 wks old) were divided into 5 treatments with 4 replications. Egg production of hens in treatment C was similar to that of hens in treatment P90 and P90E. but that of hens in treatment P80 was significantly lower (P$lt;0.0$gt;). Adding phytse to the same diet IP80E) increased egg production to the same level of treatment C. P90 and P90E. Dietary treatment did not affect egg weight and percentage of broken eggs. Daily egg mass of the P80 treatment group. however, was significantly lower (PG0.05) than the other groups, without differences among the other groups. Feed intake of treatment P90 and P90E was similar to the control group. but hens in the P80 and P80E diets consumed quantiatively more than the control diet. Feed/gain ratio of the P90 and P90E treatments was similar to that of the control diet, but the ratio for the P80 was higher than the control (P$lt;0.05). This trend was corrected by adding phytase at the level of 500 FTU. Dietary treatment did not influence the uitilization of dry matter, crude protein, crude fat and energy. Phosphorus utilization of the control diet was the lowest, and that of the P80E diet was the highest. although there was no statistical difference. The amount of dry matter :md nitrogen excretion per 100 g egg production was not influenced by dietary treatments. However, phosphrous excretion by hens fed the P80E diet was lower that other diets (P$lt;0.05), indicating that a 27% reduction could be obtained by adding phytase at the level of 500 FTU to diets containing 80% of the phosphorus recommended by NRC (1994). Present result, may suggest that phosphorus levels could be reduced to 80% of one NRC (199-41 requirement in the presence of phytase.
옥수수 - 대두박 사료내 미생물 Phytase 의 첨가가 브로일러의 생산능력에 미치는 영향
손광수,권관,권찬호,장재익,주종철,유문일,최양웅 한국축산학회 1999 한국축산학회지 Vol.41 No.5
This experiment was conducted to evaluate the effects of a domestic phytase originated from bacterial source on performance of starter and Bower broiler chicks. It was basically designed to meet NRC requirement for the contents of calcium and phosphorus when the contents of Ca and P in the feeds were met to 100%(Control; C) and 80%(P0) of the NRC requirement. Three different bacterial phytase(0, 300, 500PU) were supplemented to basal diet and compared it's effect on growth performance, nutritional digestibility, fecal N and P excretion, tibial Ca and P content. A total 200 broiler chicks were assigned to 4 treatments with 5 replications per treatment, 10 chicks of each replication. The weight gain(1,581.6g) in control treatment(C) was slightly higher than that of P0(1,557.7g). Although phytase treatments(P300 and P500) tended to show higher weight gain as compared to treatments without phytase, there were no significant differences among the treatments. No differences were observed among dietary treatments for feed efficiency although broiler chicks fed control diet (1.94) tended to show slightly better feed efficiency than those fed P0 diet(1.99). The excretion of P per kg weight gain tended to be decreased by 17% when 300PU of bacterial phytase was fed to starter and by 10% when 500PU was fed to Bower. However, there were no statistical significances among the treatments. It was concluded that the addition of phytase had neither affects in improving of utilization efficiencies of dry matter, crude protein, and crude fat, nor efficiencies of Ca and P. The supplemental of phytase at the level of 500 ppm for both stages of broiler chick diets was assumed to appropriate.
나기현,권관 ( Ki Hyun Ra,Kwon Kwan ) 한국축산학회 1978 한국축산학회지 Vol.20 No.6
In order to determine the substitution level of pig manure fermentation feed(PMFF) for finishing swine, a feeding trial was conducted for 60days with a total of 160 herds of three-way crossbred among Landrace × Large White × Duroc. The treatment was divided into 0, 20, 40, and 60% according to the intake level of PMFF. Results obtained are summarized as follows; 1. In the chemical composition of PMFF there seas no change in the contents of nutrients before and after fermentation. Fermentation processing eliminated the specific odor of pig manure. 2. The daily gains of the treatment that used 0, 20, 40, and 60% of PMFF were 737, 672, 640, and 508g, respectively. Daily gains were depressed as the level of PMFF increased but there was no significant difference among treatments. 3. Feed intake per herd fed 0, 20, 40, and 60% of PMFF were 200.69, 200.41, 234.77, and 207.90Kg respectively. 4. Feed efficiency fed 0, 20, 40, 60% of PMFF were 4.54, 4.97, 6.11, and 6.82 respectively It was found that the feed efficiency was depressed as the level of PMFF increased in the: ration. There was significant differency at 5% level between the treatment fed 0% to 20% and 40% to 60%. 5. Carcass evaluation data showed no definite difference among treatments. 6. In the economical analysis, feed post required per Kg of body weight gain was increased as the intake level of PMFF increased.