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RISS 인기검색어
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- 저자 : 이택원 ( Taek won Lee ) (검색결과 6 건)
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젖소 사육을 위한 조사료의 개발에 관한 연구 ( NH3 가스 처리에 의한 보리짚의 사료가치 개선에 관한 연구 )
이택원 ( Taek won Lee ) 한국축산학회 1981 한국축산학회지 Vol.23 No.4
This experiment was conducted to improve the feeding value of barley straw. Straw was tightly packed with. vinyl film and treated four levels of liquid anhydrous ammonia (1%, 3%, 5% and 7% by weight) and stored in the environmental temperatures (from 19 to 28℃) for 1 week, 2 week, 4 weeks and 8 weeks. The results obtained were summarized as follows: 1. Contents of crude protein was increased with increasing ammonia levels and treatment period, especially, treatment of 5% or more showed almost twice the amount of crude protein. 2. Neutral detergent fiber (NDF) decreased by 10% at 5% and 7% ammonia levels. A little decreases were also recognized in other treatments. The amount of acid detergent fiber (ADF) decreased about 2% only in 5% and 7% treatment. No differences were found in the lignin contents. 3. In vitro organic matter digestibility showed a general tendency of increase, especially, after 8 weeks, all treatments of 3-7% showed increases of more than 12%. 4. Palatability of liquid anhydrous ammonia treated barley straw was good to the dairy cattle. 5. Considering the above results, barley straw treated with 5% liquid anhydrous ammonia for 8 weeks might be considered as satisfactory roughage for dairy cattle.
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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.
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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.
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볏짚 일계분(一鷄糞) 발효사료의 급여가 젖소의 산유능력에 미치는 영향
김준식,이택원,지설하,이남행 한국낙농학회 1986 韓國酪農學會誌 Vol.8 No.4
볏짚-鷄糞 사일리지의 飼料價値를 究明하기 위하여 搾乳牛에 給與하여 牛乳生産量, 乳組成, 飼料攝取量, 營養素 消化率과 反芻胃 內容物의 VFA 組成 및 pH 變化, 經濟性등에 미치는 影響을 옥수수 사일리지와 比較하기 위하여 試驗을 하였다. 泌乳에 關한 試驗은 平均體重 520㎏, 日平均産乳量이 19.2㎏인 Holstein種 10頭를 供試하였고 營養素 消化率 및 第1胃內 性狀에 관한 試驗은 平均體重 30㎏ 및 65∼75㎏되는 Corriedale숫 緬羊을 이용하였다. 시험기간중 飼料給與는 濃厚飼料와 粗飼料의 給與比率을 40:60으로 하였다. 얻어진 試驗結果를 要約하면 다음과 같다. 1. 飼料攝取量은 乾物量으로 볏짚-鷄糞 사일리지區가 9.32㎏으로 옥수수 사일리지區 8.31㎏보다 매우 有意하게 攝取하였다(p<0.01). 2. 搾乳牛의 1日 平均 産乳量은 볏짚-鷄糞 사일리지區가 17.2㎏, 옥수수 사일리지區가 17.0㎏으로 처리간에 有意差가 없었다. 3. 乳組成에 있어서는 볏짚-鷄糞 사일리지區와 옥수수 사일리지區에서 각각 乳脂肪이 3.79%, 3.66%, 乳蛋白質 3.52%, 3.49%, 乳糖 5.17%, 5.27%로서 처리간에 有意差는 없었다. 4. 消化率 試驗에서는 옥수수 사일리지區가 일반 營養素 利用率이 약간 높았으나 纖維素 消化率은 볏짚-鷄糞 사일리지區에서 더 向上되었다(p<0.05). 5. 第 1 胃內 pH 및 總揮發性脂肪酸의 含量은 서로 비슷하게 나타났으며 propionate와 valerate는 볏짚-鷄糞 사일리지에서 더 높았다. 6. 經濟性은 牛乳 1㎏生産에 要求되는 頭當飼料費가 볏짚-鷄糞 사일리지가 158원, 옥수수 사일리지가 169원으로 나타났다. 頭當 1日 粗收入은 볏짚-鷄糞 사일리지區가 옥수수 사일리지에 비하여 314원 더 收入이 많았다. 이상의 결과를 要約하면 볏짚-鷄糞 사일리지는 搾乳牛에 대하여 옥수수 사일리지와 비슷한 飼料價値를 가지고 있으므로, 볏짚의 飼料化 利用이 증진되어 農家所得 증대는 물론 賦存飼料資源을 活用하는데 큰 意義가 있을 것이다. The current study was undertaken to determine the feeding value of the rice straw-poultry manure silage (RSPMS) as a roughage for milking cows compared with corn silage (CS). Ten lactating cows (520㎏) producing 19.2㎏ of milk daily were allotted into two treatments, RSPMS and CS, for studying the effect of feeding two silages on milking performance. Digestibility of various nutrients contained in two silages, volatile fatty acid (VFA) production and pH changes of rumen juice after feeding these silages were investigated using eight Corriedale rams of 30㎏ and 65-75㎏, body weight, respectively. The results obtained were summarized as follows: 1. Dry matter intake of RSPMS was significantly (P<0.01) higher than that of CS (9.3㎏ vs 8.3㎏/day). 2. There was no significant difference in milk production between two treatments (RSPMS = 17.0㎏, CS = 17.2㎏/day). 3. The milk composition of RSPMS group and CS group were: milk fat 3.79%, 3.66%; milk protein 3.52%, 3.49%; milk lactose 5.17%, 5.27%, respectively. There was no significant difference between two treatments. 4. Digestibility of some nutrients tended to be slightly higher in CS diet. In contrast, the digestibility of crude fiber was significantly (P<0.05) higher in RSPMS ration. 5. Ruman pH and total VFA production were similar between treatments. Propionate and valerate were higher in RSPMS group. 6. The feed cost for producing 1㎏ milk was estimated as ￦158 (RSPMS group) and ￦169 (CS group). More net income (￦314/head) was made in RSPMS group.
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