http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
유전적 및 경제적으로 적합한 한국유우(韓國乳牛) 육종체계(育種體系) 수립에 관한 연구
이택원,김내수 한국낙농학회 1985 韓國酪農學會誌 Vol.7 No.3
Because of massive import of dairy cow recently in Korea, the size of cow population was increased and a systematic breeding system was required to improve the cows. A cow recording system was required to establish the system. Under the assumption of the limited cow recording, a computer simulation study was carried out with the biological parameters from variouse articles and the economics of the cost and of the return. The maximum net return was assumed to be dependent variable for a optimum breeding plan. When the cow populations were assummed to be 100, 200 and 500 thousands and the recorded elite cow population was assummed to be 5,000, the optimum numbers of young bulls were 50, 45 and 45 heads and the proven bulls for dams were 34, 38 and 38 heads, respectively. The three highest bulls among the proven bulls were used to sire of young bulls for next generation. The genetic gain of milk yields were resulted 44, 45 and 45㎏ annually.
가축분의 사료화를 위한 연구 9 . 수집계절 , 수집방법 및 건조방법이 계분의 영양소함량에 미치는 영향
이택원,육종융,한인규,정정수,유문일,정천용 ( Tack W . Lee,Chong Y . Yuk,In K . Han,Chung S . Chung,Moon I . Yoo,Chun Y . Chung ) 한국축산학회 1978 한국축산학회지 Vol.20 No.5
This experiment was conducted to investigate the changes in chemical composition of dehydrated poultry waste (DPW) as affected by season (spring, summer, autumn, winter), collection intervals (12, 24, 36, 48 hours) and drying process (oven dry, oven dry often solar exposure for I-day, oven dry after solar exposure for 2-day, oven dry after solar exposure for 3-day, oven dry after solar exposure for 4-day). The waste was collected from laying hens of White Leghorn strain at Livestock Experiment Station and College of Agriculture, Seoul National University. Fresh hens excreta was dried in drying even at 80℃ for 24 hours after various preliminary treatment as originally designed. The results obtained are summarized as follows: 1. Crude protein content of dries poultry waste collected in winter (38.40%) way much higher than that of spring (28.63%), autumn (24.91%) and summer (22.20%). However, no definite; trend by season was found in the contents of crude fat, crude fiber, crude ash and nitrogen free extract (NFE). 2. Although the collection intervals had no effect on the contents of crude fat. crude fiber, crude ash and NFE, the crude protein content of DPW collected at 12 hours interval (30.15%) showed the higher than the at 24 hours (29.62%), 36 hours (27.70%), or 48 hours (27.20%). 3. It was found that the crude protein content of DPW dried in drying oven at 80℃ was analyzed to be 34.45% and that of DPW dried in oven after solar exposure for 1 day, 2 days, 3 days and 4 days was found to be 30.19%, 28.32%, 27.75% respectively. Drying process had no effect on the other chemical components of DPW studies. 4. Present data indicated that the content of crude protein in DPW could best be retained when fresh poultry waste was dried in oven at 80℃ regardless of collection intervals. It was also apparent that nitrogen loss was proportional to the length of collection intervals, even if same method of drying process was used. It appeared that the content of crude protein and fat was more easily affected by season, collection interval and dying method than the other chemical components.
牛糞 添加가 産卵鷄의 成長과 初産卵 日齡, 初産卵時분重 및 初産卵重에 미치는 影響
李澤遠,金乃壽 충북대학교 농업과학기술연구소 1987 農業科學硏究 Vol.5 No.1
In order to investigate the proper rate of addition of dehydrated cattle manure (DCM) to chicks feed, 0%, 1%, 3% and 5% of DCM were added to basal feed. These feeds were used to the pullets from one day old to the begining of laying. The results obtained were as follows; 1.No significant differences were detected among the lots in weight gain, the amount of feed intake and feed efficiency until 12 weeks. However a tendency was shown, i.e. the weight gain was redused as the rate of DCM was increased in the feed. 2.The age when 80% of pullets began to lay was 154 days old in the control lot. As the rate of DCM was increased in the feed, the age of laying was retarded (p<0.05). The body weight at the begining of laying also showed diffrences among lots (p<0.01), even though no tendency was detected in accordance with the content of DCM in the feed. However, heavier eggs were produced at the begining of laying, as the rate of DCM in the feed increased. The differences of weight of eggs among lots were not statiscal significance. 3.According to the above results it would be concluded that DCM could be added up to 5% until 12 weeks as grower feed for laying young chicks but not be added any amount in the pullet feed after 12 weeks of age.
느타리 버섯 종균의 접종에 의한 볏짚의 사료가치 개선에 관한 연구
이택원,김법회 ( T . W . Lee,B . H . Kim ) 한국축산학회 1982 한국축산학회지 Vol.24 No.6
This experiment was carried out in order to investigate the nutritive value of rice straws, which were produced by inoculated with the isolate of Pleurotus Ostreatus SACCARDO. A feeding trial was conducted for 4 months to evaluate the feeding value of either raw rice straw or Pleurotus Ostreatus SACCARDO treated rice straw for growing fattening calves. Eight Korean native steer calves were randomly assigned into 2 groups according to their age and body weight. The obtained results were summarized as follows. 1. The rice straw inoculated with isolate of Pleurotus Ostreatus SACCARDO increased significantly (p$lt;0.01) about 40% in crude protein contents from 3 weeks after the treatments, and increased slightly in crude ash, but crude fat decreased significantly (p$lt;0.05) and the other ingredients showed some decrease in contents. 2. Lignin contents of treated rice straw decreased little by little as the time elapsed but there was no any significant decreases in this experimental period. 3. The treated rice straw was consumed a little less in quantity than raw rice straw. 4. During the experimental period, the average total body weights gain of calves which were fed with the treated rice straw was 92.50㎏, while that of calves fed with raw rice straw was 91.25㎏. 5. As for the amount of feeds required per l㎏ of body weight gain, in treated rice straw plots calves consumed 3.23㎏ of concentrate and 3.82㎏ of treated rice straw and in the raw rice straw plots calves consumed 3.25㎏ of concentrate and 4.22㎏ of raw rice straw, so that a better feed efficiency was showed in the treated straw.