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적수온(21-24℃)에서 사육한 성장기(317 g) 넙치(Paralichthys olivaceus)의 배합사료 적정 공급률
오대한 ( Dae Han Oh ),김성삼 ( Sung Sam Kim ),김강웅 ( Kang Woong Kim ),김경덕 ( Kyoung Duck Kim ),이봉주 ( Bong Joo Lee ),한현섭 ( Hyon Sob Han ),김재원 ( Jae Won Kim ),( Okorie Eme Okorie ),배승철 ( Sung Chul Bai ),이경준 ( K 한국수산과학회 2014 한국수산과학회지 Vol.47 No.4
We investigated the effects of feeding rate on the growth performance, blood components, and histology of grow- ing olive flounder Paralichthys olivaceus. Optimum feeding rate (initial fish mean weight: 316.7±6.18 g) was de- termined under the optimum water temperature. Two replicated groups of fish were fed a commercial diet at rates of 0%, 0.4%, 0.6%, and 0.8% of body weight (BW) per day, and to satiation. Feeding trial was conducted using a flow-through system with 10 1.2-metric ton aquaria receiving filtered seawater at 21-24°C for 3 weeks. Weight gain (WG) and specific growth rate (SGR) were significantly higher in fish fed to satiation (1.0% BW/day) than in those in other treatments. These parameters were negative and significantly lower in the starved fish than in fish fed the experimental diet at all feeding rates. There were no significant differences in WG and SGR among fish fed at 0.4%, 0.6%, and 0.8% BW/day. Hematocrit and hemoglobin in fish fed to satiation were significantly lower than those in other treatments. Histological changes of fish fed at 0.6% BW/day indicated that this group was in the best condition; differences were not found in tissues of fish fed at 0%, 0.6% and 1.0% BW/day. Broken-line regression analysis of weight gain showed that the optimum feeding rate of olive flounder weighing 317 g was 0.99% BW per day at the optimum water temperature.
배합사료의 크기, 공급횟수 그리고 사육밀도가 조피볼락 (Sebastes schlegelii) 치어의 성장에 미치는 영향
오대한 ( Dae Han Oh ),송진우 ( Jin Woo Song ),김민기 ( Min Gi Kim ),이봉주 ( Bong Joo Lee ),김강웅 ( Kang Woong Kim ),한현섭 ( Hyon Sob Han ),이경준 ( Kyeong Jun Lee ) 한국수산과학회 2013 한국수산과학회지 Vol.46 No.4
We performed four sets of feeding trials to establish optimum feed size (Exp-I), stocking density (Exp-II) and feeding frequency (Exp-III and IV) for Korean rockfish. In Exp-I, three different particle sizes of a commercial diet (small, 2.0-2.1 mm; medium, 2.4-3.2 mm; and large, 4.0-5.3 mm) were fed to four replicate groups of fish (22.8±0.1g), each of which was fed to apparent satiation for six weeks. In Exp-II, fish (44.3±0.4 g) were reared at four stocking densities (1.5, 3.0, 4.5 and 6.0 kg/m3) and fed a commercial diet to apparent satiation for four weeks. In Exp-III, fish (14.8±0.1 g) were fed a commercial diet once, twice, thrice, 4× or 5× a day at a feeding ratio of 3.25% of body mass. Another group of fish was fed the same commercial diet 5× a day to apparent satiation; this treatment was designated FS (five times satiation/day). In Exp-IV, fish (31.3±0.1 g) were fed a commercial diet once, twice, thrice or 4× a day to apparent satiation. Another group of fish was fed to apparent satiation once every 48 hours. In Exp-I, fish fed the large particle (4.0-5.3 mm) diet had a significantly higher feed conversion ratio and lower protein efficiency ratio than fish fed the small particle diet. In Exp-II, groups of fish reared at densities of 4.5 and 6.0 kg/m3 had significantly higher feed intake and growth performance than fish reared at 1.5 and 3.0 kg/m3. In Exp-III, fish fed to apparent satiation had significantly higher growth performances than fish fed once or 4× a day. A significantly higher feed conversion ratio and a lower protein efficiency ratio were obtained in the FS group. In Exp-IV, growth performance and feed utilization efficiency were not significantly affected by experimental variation in feeding frequency. Fish fed to apparent satiation once every 48 hours had better feed utilization than those in other treatments and growth performances of those were comparable. Therefore, the optimum feed particle size, stocking density and feeding frequency for Korean rockfish under conditions we used were 2.0-3.2 mm, 4.5-6.0 kg/m3, and once a day or once every 48 hour, respectively.
( Agus S. Somantri ),( Dae Sob Lee ) 한국농업기계학회 2018 한국농업기계학회 학술발표논문집 Vol.23 No.1
The main problem in increasing of rice production is the high loss of rice (10-15%) due to the use of improper equipment on each stage of harvesting and post-harvest. Based on Korea's success in increasing rice production through the use of high-tech equipment is necessary to be applied gradually in Indonesia in order to improve the production of rice by reducing the losses of rice. This study aimed to develop the technical policies to reduce the yield loss of rice by reference to the success of Korea. The methods used were (a) identification of current status of rice postharvest management system in Indonesia and Korea; (b) comparison analysis of the rice postharvest management system in both countries; (c) SWOT Analysis; and (d) arranging the recommendation of rice postharvest management strategy. The results showed that the use of properly postharvest facilities had given a good yield on postharvest handling of rice in Korea. The comparison of rice productivity between Korea and Indonesia respectively i.e. rice losses in Korea 3% and 10-15% in Indonesia, while the milling rate in Korea 73.5% and in Indonesia 63-65%. The postharvest management system of rice in Korea is able to increase production, reducing losses and cost, strengthen farmer’s position in the market, and enhancing market efficiency. In order to increase food security in Indonesia by implementing better rice postharvest management system, it is needed the strategic policies include: a. Government must support mechanization programs; b. Agricultural Science and Technology Promotion; c. Postharvest management system must be supported by relevant agencies; c. Development of dissemination and training program; d. Provide technical assistance to farmers to start business, and develop local products to increase farm income; e. Strengthen the role of the Agricultural Cooperative. Moreover, the impact of postharvest management policy in Korea will be reviewed and it will be used as a reference to develop the postharvest management policy in Indonesia. The implementation of this policy was expected to improve the rice production, reducing the losses, reducing cost, enhancing the rice processing facility, and increasing the efficiency of marketing system. In the long term, the goals of enhancing rice postharvest management system strategies are for increasing food security level, increasing food competitiveness, and increasing the farmer’s income.
사료 내 단백질과 지방 수준이 참돔(Pagrus major) 치어의 성장, 사료효율 및 비특이적 면역력에 미치는 영향
김성삼 ( Sung Sam Kim ),오대한 ( Dae Han Oh ),최세민 ( Se Min Choi ),김강웅 ( Kang Woong Kim ),김경덕 ( Kyoung Duck Kim ),이봉주 ( Bong Joo Lee ),한현섭 ( Hyon Sob Han ),이경준 ( Kyeong Jun Lee ) 한국수산과학회 2015 한국수산과학회지 Vol.48 No.3
A 3×3 factorial study was conducted to investigate the effects of dietary protein and lipid levels on the growth, feed utilization and innate immunity of red seabream Pagrus major. Nine diets consisting of three protein levels (42%, 46% and 50% crude protein) and three lipid levels (10%, 14% and 18% crude lipid) were formulated. Triplicate groups of red seabream were fed the experimental diets to apparent satiation (5-6 times a day, from 08:00 to 18:00 h at 2-h intervals) for 10 weeks. At the end of the feeding trial, the weight gain and specific growth rate of fish fed P46L14 (46% protein and 14% lipid), P50L10 (50% protein and 10% lipid) and P50L14 (50% protein and 14% lipid) were significantly (P<0.05) higher than those of fish fed P42L18 (42% protein and 18% lipid). The feed conver-sion ratios (FCR) of the fish were affected by dietary lipid levels (P<0.039), but not dietary protein levels. The FCR tended to increase with increasing dietary lipid levels from 10% to 18% with the 46% and 50% protein levels. The weight gain, protein efficiency ratio, specific growth rate, feed intake and survival of fish were not affected by either dietary protein or lipid levels. Myeloperoxidase activity in the group fed P50L14 (50% protein and 14% lipid) was significantly higher than that in the group fed P42L10 (42% protein and 10% lipid) or P50L18 (50% protein and 18% lipid). However, the myeloperoxidase activity of fish was not affected by either dietary protein or lipid level. The fish fed P46L14 (46% protein and 14% lipid) and P46L18 (46% protein and 18% lipid) showed significantly higher superoxide dismutase activity than did the fish fed P46L10 (46% protein and 10% lipid), P50L10 (50% protein and 10% lipid) of P50L18 (50% protein and 18% lipid). In conclusion, the optimum protein and lipid levels for the growth and feed utilization of juvenile red seabream were 46% and 14%, respectively, and the optimum dietary protein to energy ratio was 27.4 g/MJ.
넙치( Paralichthys olivaceus ) 치어 사료에서 산 가수분해 농축대두박 (Acid-concentrated soybean meal)의 어분대체효과 및 소화율 평가
김성삼 ( Sung Sam Kim ),오대한 ( Dae Han Oh ),조성준 ( Seong Jun Cho ),서상현 ( Sang Hyun Seo ),한현섭 ( Hyon Sob Han ),이경준 ( Kyeong Jun Lee ) 한국수산과학회 2014 한국수산과학회지 Vol.47 No.6
This study was conducted to investigate the effects of fishmeal replacement with acid-concentrated soybean meal (ACSBM) on growth performance, blood biochemistry, and ingredient digestibility in juvenile olive flounder Para lichthys olivaceus . Six experimental diets were formulated to replace fishmeal protein with ACSBM at 0%, 20%, 30%, 40%, 50%, and 60% (designated ACSBM0, ACSBM20, ACSBM30, ACSBM40, ACSBM50, and ACSBM60, respectively). Triplicate groups of fish (initial fish mean weight: 14.3±0.03 g) were fed the experimental diets to apparent satiation (twice daily at 08:00 and 18:00 h). After a 12-week feeding trial, a total of 180 healthy fish were randomly distributed into three Guelph system tanks at a density of 60 fish/tank (initial fish mean weight : 50.6±2.4 g) to test the apparent digestibility coefficients of the ingredients (ACSBM, fishmeal, and soybean meal). Although negative effects were observed with ACSBM40, ACSBM50 and ACSBM60 after 12 weeks of feeding, up to 20% of the fishmeal protein could be successfully replaced with ACSBM without significant growth depression. Hemoglobin and hematocrit values of fish fed the ACSBM50 and ACSBM60 diets were significantly lower than those of fish fed the ACSBM0 diet. Glucose values of fish fed the ACSBM60 diet were significantly higher than those of fish fed the ACSBM0 and ACSBM20 diets. Digestibility of protein in ACSBM and soybean meal was 85.9% and 82.5%, respectively. Results indicated that at least 20% of fishmeal protein can be replaced by ACSBM in diets of juvenile olive flounder without supplementation of limiting amino acids.