양계사료에 대한 광물질 첨가제로서 패화석 분말의 이용

박용윤,장윤환,양문열,김강식 ( Y . Y . Park,Y . H . Chiang,M . I . Yang,K . S . Kim ) 한국축산학회 1973 한국축산학회지 Vol.15 No.3

These feeding experiments for poultry with fossil meal were carried out to determine the value of a trace mineral supplement. A commercial trace mineral as a control and 0, 1.5, 3.0 and 4.5% fossil meals were used for broiler studies. The body weight gain, feed conversion and economics of these feedings were compared. For layer study, consumption and conversion of feed, production and quality of egg and shell thickness were examined in 1 to 4% fossil levels. The results obtained are summarized as follows: 1. In broiler experiment, the body weight gain in 1.5% fossil feeding was the highest and the control followed it, but no significant difference was shown between them. Low body weight gains were shown in the others. 2. The feed conversion and economics for these feedings presented same trend as that of body weight gain. The best results were obtained in 1.5% fossil feeding. 3. In layer study, the plots of fossil supplements consumed more feed than the control. The body weight with layering with fossil feeding was decreased less than the control. However, 4% feeding was exceptional. 4. The egg production of 1% plot was higher than the control, but there was no significant difference between them. However, production results obtained from the both feedings were significantly higher than the rest of higher fossil feeding groups. 5. The egg shell of 1% fossil feeding was shown slightly thicker than those of others. 6. The egg quality (Haugh Unit) was best shown (p$lt;0.01) compared to that of control.

Broiler 에 대한 Pellet 사료의 효과

박용윤,강태홍,최진호 ( Y . Y . Park,T . H . Kang,J . H . Choi ) 한국축산학회 1981 한국축산학회지 Vol.23 No.4

This experiment was conducted to study the effect of all mash and pelleted diet on the growth rate, feed consumption, feed efficiency and economic return of broiler chickens. The number of birds were 168 (male 84, female 84). The results obtained were as follows ; 1. The chicken fed pelleted diet were grown 10% more than all mash fed group (P$lt;0.01). 2. Amount of feed consumed was higher for chickens fed pelleted diet than for chickens fed all mash, but no differences in feed efficiency were found between the birds fed all mash and pelleted diet. 3. In the case of male, growth rate, diet intake and feed efficiency were higher than female chickens, but no difference were found between the birds fed all mash and pelleted diet. 4. In economical analysis, pelleted ration was higher 11% more than all mash fed group.

유추에 의한 대사에너지 측정방법에 관한 연구 3 보 . 육계전용종에 있어서 시험개시시기 ( 일령 ) 및 크롬분석방법 ( 산화크롬 혹은 크롬원소 ) 이 곡류의 대사에너지가에 미치는 영향

박용윤,강태홍 ( Y . Y . Park,T . H . Kang ) 한국축산학회 1980 한국축산학회지 Vol.22 No.4

The nitrogen corrected metabolizable energy (MEn) of corn and wheat in chicken were compared among ages of chicken (15, 30 and 45 days after hatching), and between analytical methods of Chromium and Chromic oxide as a indicator method by using 210 birds of meat type chicken. Both tested feed were substituted 30% with feed basis in a commercial chicken ration. The results obtained were as follows : 1. In the 15, 30 and 45 day-old chickens after hatching the MEn of corn were 3,350, 3,398 and 3,372 ㎉ per ㎏ of corn respectively. In comparison of analytical methods between Cr and Cr₂O₃ the MEn of corn were 3,306 and 3,340 ㎉ per ㎏ respectively. Non significant differences (P$gt;.05) were found among chicken ages and between analytical methods. 2. The MEn of wheat were 3,246, 3,269 and 3,283 ㎉ per ㎏, for chicken age of 15, 30 and 45 days after hatching respectively. The MEn of wheat appeared non significant difference (P$gt;.05) among chicken ages. Also, non significant differences (P$gt;.05) were found between Cr and Cr₂O₃ method, of which the MEn were 3, 256 and 3, 276 ㎉ per ㎏ respectively. 3. In conclusion, there were appeared non significant differences among ages and between analytical methods in measuring the MEn of corn and wheat. Therefore, the Cr analytical method that is easier handling in analysis than that of the Cr₂O₃ for measuring ME in chicken might be recommended.

젖소에 대한 대두피의 사료적 가치에 관한 연구

김강식,박용윤,차영호,정재혁,박홍석 ( K . S . Kim,Y . Y . Park,Y . H . Cha,J . H . Chung,H . S . Park ) 한국축산학회 1989 한국축산학회지 Vol.31 No.4

A digestion trial with four wether lambs and a feeding trial with sixteen Holstein cows of late lactation were conducted to evaluate nutritive value of soyhull and its feeding value to lactating cows. Digestibility of dry matter, crude protein and crude fiber were 78.0, 69.9 and 74.0%, respectively and total digestible nutrient content of soyhull was about 68.8%. When soyhull was included in dairy concentrates for replacement of the same amount of corn at the levels of 5.5, 11.0 and 16.5% of concentrates (fed about 7㎏ a day), milk production gradually decreased but milk fat content was increased. When milk production per unit concentrate or total feed consumed was calculated soyhull was as efficient as corn in providing energy for milk production but the energy content of soyhull was lower than that of corn, which caused slightly lower milk production in cows fed a limited amount of concentrates containing soyhull.

유추에 의한 사료의 대사에너지 측정방법에 관한 연구 1 . 반정제사료 이용법과 관용사료 이용법의 비교

장윤환,박용윤,강태홍,지설하,이영상 ( Y . H . Chiang,Y . Y . Park,T . H . Kang,S . H . Chee,Y . S . Lee ) 한국축산학회 1977 한국축산학회지 Vol.19 No.5

Two procedures using semi-purified diet (SPD) and practical diet (PD) were compared to determine the metabolizable energy (ME) in feedstuffs by growing chicks. The reference diet of each procedure was formulated into two categories; one for starch feeds and the other(low protein) for protein feeds. The triplicate ten male chicks of White Leghorn were plotted for each treatment. The chicks two weeks old were fed experimental diets for another two weeks, of which the last three days were allotted for sampling their excreta. The feces were dried and analyzed for calorie, nitrogen, and chromium oxide. The excreted energy and nitrogen were calculated from the ratio of chromium oxide contents in feed and excreta. The ME. value was computed by the proportional method. 1. The ME. of glucose were 3,273 and 2,580 ㎉/㎏ dry matter (DM) when chicks were fed appropriate and low level of protein, respectively. The reason for less ME. values than 3,640 published by foreign researchers might be the impurity of glucose tested. However, the farmer result showed more close to the foreigners than the laters. It was considered that the suitable amount of protein in chick ration should be provided for determining the glucose ME. 2. The ME content in rations of treatments were 2,700∼3,200 ㎉/㎏ DM. The standard deviations from average ME values of SPD were less than those of PD. Therefore, it was believed that the experimental accuracy of PD method might be higher than that of SPD one. 3. The ME for yellow corn were measured as 1994 and 3,027㎉/㎏ air dry matter(ADM) when SPD and PD were employed, respectively. The later result was more similar to the others data than the formers. 4. The ME of wheat from PD procedure brought higher value than that from SPO one, and more similar to the others result. 5. The fish meal showed 2,630 and 2,752 ㎉/㎏ ADM from SPD and PD, respectively. The slightly higher value from the later was more similar to the other values, too. 6. The values from soybean meal represented a reverse trend compared to those from three kinds of feedstuffs above described. Viewing from the accuracy of measurement, similarity of the result to the others, and the expense for the ration formulation, it was believed that the PD method might be recommended for determining the ME content of feedstuffs in condition of Korea.

유추에 의한 대사에너지 측정방법에 관한 연구 2 . 유추와 산란계의 비교

장윤환,정인걸,박용윤,강태홍,이영상 ( Y . H . Chisng,I . K . Chung,Y . Y . Park,T . H . Kang,Y . S . Lee ) 한국축산학회 1978 한국축산학회지 Vol.20 No.4

This study was carried out to compare the procedures employing chicks or laying hens and the methods providing them practical or semi-purified diet for measuring the metabolizable energy in poultry feedstuffs. The 210 male chicks and 56 laying hens of White Leghorn were utilized and the metabolizable energy in white corn and wheat were determined by two lends of birds. It was shown that practical or semi-purified digit did not derive significant difference between growth rate of chicks, egg production of layers and their feed efficiency according to the 14 day s experiment. The metabolizable energy contents in white corn and wheat were 3,085 and 2,792㎉/㎏. No significant difference between metabolizable energy contents measured by chicks and layers both in yellow corn and wheat was found. However, it was considered that employing chicks would be desirable in respect of economics and feeding practice. Between the metabolizable energy contents determined by providing the practical and semi-purified diets no significant difference was discovered, too. It was thought that providing the practical ration would be hopeful for the measurement of metabolizable energy regarding purchase, processing, and price of ingredient feeds.

인의 각종 공급원이 산란계의 무기물 대사에 미치는 영향 1 . 관용사료를 이용하였을때의 칼슘과 인의 외견상 소화율의 비교

김강식 ( K S Kim ),장윤환 ( Y H Chiang ),박용윤 ( Y Y Park ),이영상 ( Y S Lee ) 한국축산학회 1972 한국축산학회지 Vol.14 No.3

Fourteen-month old laying hens, surgically operated and held polyethylene canule for separate collection of feces and urine, were used to study the effect of three different sources of supplementary phosphorus on minerals metabolism. The three groups of birds (six per gruop) were fed rations including raw bone meal (RBM), steamed bone meal (SBM), and dicalcium phosphate (DP). The feed consumptions, calcium and phosphors intakes, and dry matter digestibilities of three treatments represented statistically similar levels. There was also no significant difference between calcium digestibility of RBM ration (39.2%) and that of SBM ration (42.8%). However, the DP ration showed higher value of calcium digestibility (67.6%) than those of the other two rations. The phosphorus digestibilities of the three rations were 39.2% 37.4%, and 65.1% orderly, which demonstrated the similar trends as in calcium digestibilities. The metabolic rates of minerals were determined, where the fecal and urinal minerals were subtracted from the intake amount of minerals. There was no significant difference between the metabolic rates of calcium in RBM (15.7%) and SBM (32.8%) diets. And there was also no significant difference between those in SBM and DP(54.5%) rations. However, there appeared highly significant difference between those in RBM and DP diets. Therefore, it was found that the SBM diet showed middle quality among three rations on the basis of calcium metabolic rate. The metabolic rates of phosphorus in tested diets were 23.1%, 32.8% and 52.8%. Both bone meals showed no significant differences, but the DP ration presented highly significant difference from both bone meals. The amounts of minerals in eggs produced during tested period were subtracted from the metabolizable minerals. The remainder was called as total balance. This observation showed the similar results as shown in metabolic rates. It was concluded that the dicalcium phosphate diet was better than both bone meals diets at the view point of Ca and P metabolism in laying hens.

한우 육성비육우의 (育成肥育牛) 생산성 향상에 관한 연구 (2) 생균제 (生菌劑) 투여가 육생산 및 사료효율에 미치는 영향

강수원(S . W . Kang),정연후(Y . H . Chung),손용석(Y . S . Son),박용윤(Y . Y . Park),송창수(C . S . Song) 한국영양사료학회 1993 韓國營養飼料學會誌 Vol.17 No.2

부로일러 사료에 대한 항생물질제조 부산물 ( Ugifac ) 의 사료적가치에 관한 연구

강태홍,박용윤,최진호,정인걸 ( T . H . Kang,Y . Y . Park,J . H . Choi,I . K . Chung ) 한국축산학회 1980 한국축산학회지 Vol.22 No.4

This experiment was carried nut to investigate the nutritive value of antibiotic fermentation by-product (Ugifac) for broiler diets, 270 birds of Hybro male chicks were divided into 6 groups, which were the substitution level by Ugifac 0, 1, 2, 3, 4, 5% for 8 weeks. The results obtained were as follows; 1. Ugifac contains 68.60% C. Ash, 17.32% C. Protein, and 0.67㎎/g of kanamycin. 2. By increasing the levels of Ugifac, it was tended to increase body weight gain and the amounts of feed consumption. 4% levels of Ugifac was better than any other treatments in terms of feed efficiency and economics. 3. There was no evidence of antibiotics retention on muscle and liver of chicks although Ugifac was supplemented till 5%. In conclusion Ugifac can be used within the 4%. levels for broiler diets efficiently without antibiotics retention problems, although the chemical composition of Ugifac was relatively low in quality.

육성 비육돈에 대한 동 에너지 수준에 계절별 우지 첨가 효과

정일병,박용윤,한인규 ( I . B . Chung,Y . Y . Park,I . K . Han ) 한국축산학회 1985 한국축산학회지 Vol.27 No.6

A trial with one-hundred-forty-four crossbred pigs were conducted to study effects of dietary tallow supplementation (0, 2, 4, 6, 8 and 10% tallow) with constant energy level (3,400 ㎉ P.E. per ㎏ feed) during summer and winter on the performance and carcass characteristics of growing-finishing swine. Seasons had no significant influence on average daily gain, feed intake, feed per ㎏ gain and carcass traits. In winter, daily gain, feed intake and feed per ㎏ gain were reduced with increasing level of tallow addition, whereas dressing percentage and backfat thickness were increased with increasing levels of tallow supplementation. In summer, daily gain, feed intake and feed per ㎏ gain responded quadratically as levels of tallow addition increased, yet dressing percentage and backfat thickness were increased as levels of tallow supplementation. It was estimated that the optimum level of tallow in a diet with 3,400 ㎉ D.E. per ㎏ feed for growing-finishing swine in summer season was 4%.