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옥피사료의 개발에 관한연구 2 . 농후사료에 대한 옥피사료의 일부대치가 소화율 및 육성한우의 성장에 미치는 효과
한인규,손광수,정정수,박홍석 ( In K . Han,K . S . Sohn,C . S . Chung,H . S . Park ) 한국축산학회 1979 한국축산학회지 Vol.21 No.6
An in vivo digestibility experiment and two feeding trials have been conducted to investigate the nutritive value of corn bran-based concentrate feed for growing Korean cattle. In the first feeding trial with twenty Korean cattle weighing 320-340 ㎏, a corn bran-based concentrate feed containing 40% corn bran was used at 10, 20, or 30% level of total concentrate fed. These corn bran feed and the control commercial beef feed mixture were fed with rice straw as a roughage source for 56 days. There were no significant difference in concentrate or straw intake, body weight gain and over-all feed efficiency, however, the concentrate mixture containing 20% corn bran diet showed significantly(P$lt; 0.05) higher feed efficiency than others when the concentrate mixture intake alone was considered. For the digestibility trial with eight wether lambs and the second feeding trial with twenty Korean cattle weighing 200-250 ㎏, the feeds containing 50, 40 or 30 % corn bran were used at a 20 % level of the total concentrate fed. It was suprising that the digestibility and TDN value of the feed containing 50% corn bran were comparable to those of the control and better than those of the diets containing 40 or 30% corn bran treatment. Results of 140 days of feeding trial also showed that over-all feed efficiency for the groups fed diet containing 50% corn bran, considering the concentrate and rice straw intake together, was better than any other corn bran treatments (P$lt;0.05), although there was no significant difference in concentrate or straw intake, body weight gain, or feed efficiency of concentrate intake alone among treatments and the control. Daily body weight gain and over-all feed efficiency of the control, the diets containing 50, 40 and 30% corn bran treatment, respectively were 0.80㎏ and 6.80, 0.83㎏ and 6.66, 0.77㎏ and 7.13 and 0.73 ㎏ and 7.03 respectively. These results suggest that, if nutrients are properly supplemented, corn bran can be satisfactorily used up to 50% in the corn bran-based concentrate feed which will be fed at a 20 % level of total concentrate with poor quality roughage like rice straw.
옥피사료의 개발에 관한연구 1 . 옥피사료의 반추 미생물에 의한 in vitro 발효 및 in vivo 소화율 및 질소균형에 미치는 영향
한인규,손광수,정정수,박홍석 ( In K . Han,K . S . Sohn,C . S . Chung,H . S . Park ) 한국축산학회 1979 한국축산학회지 Vol.21 No.6
In an effort to develope a corn bran-based concentrate feed for growing Korean cattle, corn bran was used at the levels of 50%, 40, and 30% and the rest was supplemented with proper nutrients. Energy and nitrogen were supplemented with corn starch, molasses, corn germ meal and urea. Vitamines and mineral sources were also added in the mixture. As a preliminary step of evaluating the feeding value of these corn bran feed, an in vitro fermentation and an in vivo digestibility experiment were conducted. The results obtained were as follows 1. During the first 12 hours of in vitro fermentation production of acetic, propionic and butyric acid from the feed containing 50% corn bran was significantly (P$lt;0.05) lower than the control or other cornbran feeds. However, after 24 hours of fermentation there was no difference in the production of these acids except acetic and propionic acid that were significantly (P$lt;0.05) higher for the feed containing 30% corn bran than other. 2. Digestibility of crude fiber and ash was higher and ether extract v, as lower for the corn bran feeds than the control feed in general. As the corn bran level was lowered, digestibility of crude protein and nitrogen free extract was increased but digestibility of crude fiber and ether extract was decreased. 3. Total digestible nutrients (TDN) of the control, the feeds containing 50%, 40% and 30% corn bran were 56.68, 55.59, 58.02 and 58.27%, respectively. As the corn bran level was lowered, digestible nitrogen free extract was increased and that made TDN value higher but significantly lowered digestible crude fiber of the feed containing 30%, corn bran made its TDN value similar to that of the feed containing 40% corn bran. 4. During the collection period of the digestion trial, fecal excretion of nit rogen was lowest for the feed containing 30 % corn bran but urinary excretion of nitrogen was highest for the diet containing 50% corn bran. Nitrogen retention was about 12.0% of intake for the diet containing 50 % corn bran and about 20.0 % for the rest corn bran feeds and control feed. 5. Over all results, considering the fact that the digestibility of crude fiber was depressed and scouring problem was observed with the diet containing 30% corn bran, indicate that corn bran can be succesfully used at the level of 40% on more in a corn bran-based concentrate mixture for cattle feeding.
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.
국산박류의 사료적 가치에 관한 연구 5 . 난용계 유추에 대한 국산박류 비교시험
정정수,정인걸,한인규 ( Chung S . Chung,In K . Chung,In K . Han ) 한국축산학회 1978 한국축산학회지 Vol.20 No.1
This experiment was conducted to compare the nutritive values of locally produced oil meals for egg-type starters from birth to 6 weeks of age. Six hundred white Loghorn chickens of Hisex strain were devided into two groups i.e. group A (partial substitution for soybean lil meal) and group B(complete substitution for soybean oil meal). The group A and B were splited into 5 treatments, namely soybean oil meal (SBOM), perilla oil meal (POM), sesame oil meal (SOM), rapeseed oil meal (ROM) and corn gluten meal (CGM), respectively. The results obtained are summarized as follows. 1. The protein contents of CGM, SEOM, SOM, POM and ROM used in this experiment were 68.79, 44.33, 40.49, 39.16 and 32.25%, respectively. The methionine content of SEOM(0.53%) was found to be the lowest and of CGM (1.45%) was the higest. On the other hand, the lysine content of SOM(0.67%) was lowest and that of SBOM (2.06%) was the highest. 2. The body weight gains of CGM and SBOM treatment in the group A were higher than other treatments and that of SOM treatment was the lowest (P$lt;0.01), as were the case in the group B. The feed intake and feed efficiency showed the same tendency as the body weight gain. 3. It was found that there were no differences in nutrients utilizability among treatments.
유전공학 생산 돼지 성장흐로몬 ( rPST ) 투여에 관한 연구 2 . rPST 가 비육돈의 발육과 등지방두께에 미치는 영향
정일병(I . B . Chung),유용희(Y . H . Yoo),정숙근(S . K . Chung),한인규(I . K . Han) 한국축산학회 1993 한국축산학회지 Vol.35 No.4
Eighty-four crossbred[D(♂)×YL(♀)] gilts and barrows about 50 ㎏ of body weight were used to investigate the effect of recombinant porcine somatotropin(rPST) administration on growth performance and backfat thickness of finishing pigs. Pigs were allotted in a 2×3 factorial arrangement with sex(gilts or barrows) and rPST (fl. 2 or 4㎎/head/day), fed containing 3.6 meal DE/㎏ and 1.2% lysine and measured live backfat thickness twice a week by the ultra backfat thickness. By the rPST administration, hoth of chilly gain and feed per 1㎏ gain were improved by 18%(p$lt;.05). It was found that the effect of rPST administration on daily gain and feed per 1㎏ gain was more effective in harrows than in gilts. The live backfat thickness started to decrease from about 14 days after rPST administration. As the duration of the rPST administration extended, the decreasing gap of live backfat thickness grow gradually larger and was higher in barrows than in gilts. These results suggested that sex effect difference, with respect to growth performance and backfat thickness was minimized by rPST administration.
국산박류의 사료적 가치에 관한 연구 8 . 피마자박의 제독처리방법에 관한 시험
김규호,한인규,정천용,정운익 ( Kyu Ho Lee,In K . Han,Chon Young Chung,U . I . Chung ) 한국축산학회 1978 한국축산학회지 Vol.20 No.2
This experiment was undertaken using 314 broiler chicks to study the detoxification methods of castor bean meal for about 100 days which was unused until today due to its serious toxic effect to the animal despite of its valuable protein content. In this experiment, 12 kinds of detoxification treatments of castor bean meal were compared by the biological test and nutrient content. The results obtained are summarized as follows: 1. There were no differences in general composition and amino acid content among the castor bean meals detoxicated by various treatments which were combined with autoclavings (0, 30, 60 minutes), HCl or NaOH treatment and water treatment. 2. In body weight gain of broilers, remarkable differences were found among the experimental diet groups which contained 12 kinds of detoxicated castor bean meals. Body weight gain was significantly improved by autoclaving process (P$lt;0.05) and water treatment (P$lt;0.05). Especially, the treatment 7 which contained the castor bean meal autoclaved at 120℃ and 1㎏/㎠ pressure for 60 minutes and then treated with water was superior to all of the other treatments, judging by the weight gain and simplicity of treatment. 3. The mortality of broilers for 4 weeks of experimental period was also decreased by the autoclaving and water treatment, and was not affected by HCl or NaOH solution treatment. Mortality was nil for the bird in treatment 5, 6 and 7. On the other hand, 94.4% of the chicks were died on the non treated castor bean meal diet. 4. No difference was obtained in hematocrit value and red blood cell number among treatments.
가축분의 사료화를 위한 연구 7 . 부로일러 사료에 있어서 건조계분에 의한 강부류 및 박류 대치시험
육종융,한인규,이택원,정정수 ( Chong Y . Yuk,In K . Han,Tack W . Lee,Chung S . Chung ) 한국축산학회 1978 한국축산학회지 Vol.20 No.5
This experiment was conducted to determine the using level of dried poultry waste(DPW) in broiler rations, employing 360 broiler chicks of Shaver strain for 8 week. In this experiment, 0, 4, 8, 12% of wheat bran and 0, 3, 6, 9% of sesame oil meal were replaced by DPW. The results obtained are summarized as follows: 1. In the body weight gains of chicks, there were no statistical differences among treatments. Up to 12% wheat bran and 9 % sesame oil meal could be replaced by DPW with no adverse effect on the growth rate. 2. There were no statistical differences in feed consumption and feed efficiency among treatments. 3. No statistical differences were found in nutrients utilizability among treatments. 4. Utilizability of dry matter and total carbohydrate of DPW itself were low as 30.34% and 22.32%, respectively. It is concluded that less than 8 % of wheat bran or 6 % of sesame oil meal could be replaced by DPW in the rations of broiler-type chick.