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Aspergillus Oryzae 균주로 배양한 효모 배양물의 급여가 부로일러의 육성 성적에 미치는 영향
고용균(Y . G . Goh),황영환(Y . H . Hwang) 한국축산학회 1999 한국축산학회지 Vol.41 No.1
This study was carried out to determine the effect of dietary Aspergillus oryzae yeast culture(YC) which was incubated in wheat flour medium on body weight gain, feed intake and feed efficiency in broiler chicks. Forty broiler chicks were assigned to each of 6 treatments with 4 replications. The supplementation levels of YC in the experimental diets were 0, 0.1, 0.3, 0.5, 0.7 and 1.0%. The body weight gain (BWG) of chicks fed the dietary YC slightly increased compared with those of the control. The treatment with 1.0% YC produced the highest BWG. But the significant differences (P$lt; .05) among the treatments were not found statistically. Average feed intake were not significantly different among the treatments. Average feed efficiency of the chicks fed YC was significantly(P$lt;.01) improved compare to that of the control. The most efficient result was found in the chicks of 1.0% YC.
한우의 도체평가형질에 영향을 미치는 성 , 도체중 및 생체중의 효과
이재윤,김종복,신종서,고용균,홍병주 ( J . Y . Lee,J . B . Kim,J . S . Shin,Y . G . Goh,B . J . Hong ) 한국축산학회 1997 한국축산학회지 Vol.39 No.2
The results from analysis of the records of 11,601 heads of Hanwoo cows, bulls, and steers collected after grading in Seoul Whole Sale Auction Market, NLCF from September, 1995 to March, 1996 are as follows. 1. In the effects of sex on meat yield grades, the steers showed the lowest percentage of grade A (5.05%), while the bulls and the cows showed 39.21% and 3.06%, respectively. The steers and the cows were similar in the percentage of Bade B, 78.44% and 79.93%, respectively. On the other hand, the bulls showed the lower percentage of 58.86% than the others. In meat quality Bade, percentages of grade 1 were 75.23% in the steers, 9.21% in the bulls, and 51.19% in the cows. 2. The steers had thicker backfat thickness, better intramuscular fat deposition, higher dressing percentage and better meat quality Bade but had smaller eye muscle area and lower meat index than the others, resulting in lower meat yield grade. However, the steers had relatively higher auction price. Average auction prices were 11,797.98±4.82 won for the steers, 11,191.08±4.68 won for the cows, and 10,622.19±1.39 won for the bulls. In various weight groups, the steers weighing more than 600㎏(weight group 3) had relatively larger eye muscle areas, better intramuscular fat depositions, higher dressing percentages, and better meat quality grades but thicker backfat thickness, lower meat indexes, and lower meat yield gales. 3. The cows weighting less than 550㎏ had a higher auction price than other weight groups of cows. For steers and bulls, there was no significant difference of auction price between the group weighing less than 550㎏ and the group weighing 550㎏ to 600㎏.
Ionophores 의 급여가 홀스타인 비거세우의 비육능력에 미치는 영향
신종서 ( J S Shin ),고용균 ( Y G Goh ),홍병주 ( B J Hong ) 한국축산학회 1995 한국축산학회지 Vol.37 No.6
This study was carried out to evaluate and compare the effect of feeding antibiotics on growth performance and rumen characteristics of Holstein bulls. The antibiotics used in this experiment were monensin and lasalocid as ionophores and bambermycin. The results obtained were summarized as follows: 1. The average daily gain of bulls fed antibiotics was increased by 2.4∼7.9% compared with control(P$lt;.05). Dry matter intake of bulls moderatery decreased with the addition of antibiotics except in C treatment (bambermycin group). 2. The feed efficiencies of bulls fed antibiotics were increased by 6.1∼6.7% compared with the control. 3. Digestible crude protein and total digestible nutrient requirements per ㎏ body weight gain decreased 6.07.8% by the addition of antibiotics. 4. Contents of total volatile fatty acid and propionate in the rumen were higher in bulls fed antiobiotics than in control. The acetate/propionate ratio of bulls fed antibiotics decreased compared with control. 5. Numbers of E. coil colony units in feces decreased with addition of antibiotics.
최재국(J . K . Choi),고용균(Y . G . Goh),홍병주(B . J . Hong) 한국축산학회 1991 한국축산학회지 Vol.33 No.2
This study was carried out to evaluate the effect of feeding probiotics on growth performance, rumen characteristic and blood composition of calves. [his experiment was carried out 6 weeks employing 4 month old Holstein male calves. The results obtained can be summarized as follows; 1. The average daily gain was increased 10 to 18 percent in calves fed probiotic or probiotic plus antibiotic compared with control (p$lt;.05). Dry matter intake was also increased in calves led probiotic and antibiotic (p $lt;.05). 2. Average improvement of feed efficiency was 8 percent in calves fed only probiotic or both probiotic and antibiotic compared with control. 3. Throughout the experimental period, the number of scouring days were slightly decreased with addition of probiotics. Number of E. Coli colony units were also decreased in calves fed probiotics. 4. Ruminal pH was not altered by addition of prohiotics. However, total volatile fatty acids and individual acids (acetate and propionate) production were higher in calves fed probiotic than control. Thus C/C ratio was affected by addition of prohiotics. 5. Blood components did not differ between treatments except for increased blood glucose in both calves fed probiotics and probiotic plus antibiotic.