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흰점박이꽃무지 산란 특성 조사(1) - 연중 누대사육을 중심으로 -
최인학,최성업,손진성,정태호,Choi, In-Hag,Choi, Sung-Up,Son, Jin-Sung,Chung, Tae-Ho 한국환경과학회 2020 한국환경과학회지 Vol.29 No.7
We investigated the oviposition characteristics of Protaetia brevitarsis seulensis, focusing on zone breeding throughout the year in terms of the development and utilization of insect resources. To select Protaetia brevitarsis seulensis individuals laying a large number of eggs, the number of eggs laid for each individual was measured for each individual after emergence as adults from larvae grown at room temperature in five farmhouses. The five study zone included Gongju (Tancheon), Gyeonggi (Himsen), Chungnam (Gyeryong), Taean (Wonbuk), and Siheung (Baekse). The average oviposition tendency during a 12-week period obtained from the five regions was somewhat different; however, there was no remarkable difference in overall tendency. The maximum oviposition in Protaetia brevitarsisseulensis in the five regions occurred between 6 and 7 weeks. Compared toother regions, the average cumulative number of eggs laid during the 12-week period was higher (40%-60%) in Gongju (Tancheon) and Gyeonggi (Himsen). These results indicate that in two regions, zone breeding is selected as a system for increasing the demand for insects.
흰점박이꽃무지(Protaetia brevitarsis) 성충의 우화되는 시기의 표준화
최인학,최성업,손진성,정태호,Choi, In-Hag,Choi, Sung-Up,Son, Jin-Sung,Chung, Tae-Ho 한국환경과학회 2021 한국환경과학회지 Vol.30 No.2
This study was conducted to determine and to standardize the time of emergence of Protaetia brevitarsis adults, through four breeding experiments, including one which selected the dominant individuals of Protaetia brevitarsis. The breeding experiments were divided into two groups with hibernating and non-hibernating Protaetia brevitarsis by placing 100, 150, 200, 250 and 300 Protaetia brevitarsis in each breeding box (50 cm × 35 cm × 15 cm) filled with 12 L of fermented sawdust. Breeding tests were with four replicates each for 3 months. The test period was classified into four stages: Exp. 1 (Sep 1, 2019 to Nov 30, 2019), Exp. 2 (Dec 1, 2019 to Feb 29, 2020), Exp. 3 (Mar 1, 2019 to May 31, 2020) and Exp. 4 (Jun 1, 2020 to Aug 31, 2020). The survey items included average dead number, average emergence number, average mortality, and average emergence rate. In Exp. 1 and 2, the changes in Protaetia brevitarsis adults were similar. In Tables 1 and 2, the allegorical changes of adult white-spotted flowers were similar. In addition, the average dead number, average emergence number, average mortality, and average emergence rate showed better results in the hibernation state than in both Exp. 1 and 2. Exp. 3 and 4 showed a pattern of change different from the results of Exp. 1 and 2 and these characteristics were superior in the hibernation states compared to the non-hibernation states. In conclusion, this result was found to be most appropriate as a standardization of the emergence time of 200 Protaetia brevitarsis treatments through four breeding experiments in the hibernating state.
3지역에서 채집한 유충을 우화시킨 후 사육시 흰점박이꽃무지의 산란 변화
최인학,최성업,정태호,Choi, In-Hag,Choi, Sung-Up,Chung, Tae-Ho 한국환경과학회 2020 한국환경과학회지 Vol.29 No.9
This study investigated the oviposition characteristics of Protaetia brevitarsis seulensis after emergence as adults from the larva collected from three regions in Gangwon-do, Chungcheongnam-do, and Jeju-do. The laying egg method was identified with zone breeding, and the average and cumulative number of eggs laid were measured once a week for seven weeks. The average number of eggs laid peaked until 4 weeks, and subsequently decreased. The source areas with respect to average number and cumulative number of eggs laid were in the order of Jeju > Chungnam > Gangwon. In conclusion, this result suggests a method for continuously improving management and economic feasibility of insect farming by securing genetic diversity, and raising the most productive breeds to select individuals form regions associated with high numbers of laid eggs.
최인학,Choi, In-Hag 한국환경과학회 2021 한국환경과학회지 Vol.30 No.3
This study was conducted to investigate the distribution of duck production in duck housing as a function of the breeding period. The items in duck production distribution included body weight, feed intake, feed conversion ratio, and average duck production. All data were based on eight cycles (June and December, 2017; February, June, August, September, and November, 2018; February, 2019) at Farm Site 1 through 7. The most optimal results in the duck production distribution were observed at Site 1 for weight gain, feed intake, and feed efficiency. This could be explained by the fact that Site 1 was well managed in environmental improvement and sustainability. Based on these data, selective alternatives to improve duck production in duck farms are recommended as follows: first, proper management and recording of litter used as a flooring material are required, and second, continuous management such as temperature, relative humidity and ventilation is needed. Lastly, it is necessary to change duck facilities by introducing environmental management techniques. Furthermore, efforts to improve the overall facilities and management of duck breeding farms through additional field studies are needed in the future.
동물 복지 융합형 디지털 콘텐츠 제작을 위한 야외효력시험에서 이유 자돈의 혈중 Cortisol 분석
최인학,박철,곽상기,정태호,Choi, In-Hag,Park, Chul,Kwak, Sang-Kee,Chung, Tae-Ho 한국환경과학회 2020 한국환경과학회지 Vol.29 No.5
The plasma cortisol of nurserypigs was examined using an outdoor efficacy testwith a digital content-based approach in animal welfare convergence types. Nine nurserypigs,without discriminating between female and male, were classified into 2 groups of 3 pigs each: control and group 1 (effect+nature), control and group 2(effect+nature+music). The control group was the same for group 1 and 2 to compare the effects using a t-test. There was no significant difference in plasma cortisol levels between the control group and group 1 until 4 h after stress induction. However, significant differences were subsequently found between the control group and group 1 from 8 h to 72 h (p<0.05). Further, plasma cortisol was not affected in group 2 at 0 h through 8 h and 72 h. At 12 h through 48 h, group 2 showed a reduction in plasma cortisol level compared to the control group(p<0.05). These results indicated that after stress induction, applying effect plus nature or effect plus nature plus music can effectively decrease plasma cortisol levels in nursery pigs within8 h through 72 h and may serve as a better model for digital content-based approach in animal welfare convergence types.
최인학,Choi, In-Hag 한국환경과학회 2020 한국환경과학회지 Vol.29 No.1
The effects of liquid potassium permanganate (KMnO<sub>4</sub>) on the litter quality of poultry were investigated. Two-hundred-forty 0-day-old broiler chickens (Arbor Acres) were randomly assigned to two treatments with four replicated pens of 30 chickens each. Treatment liquid KMnO<sub>4</sub> at a rate of 50 g of liquid KMnO<sub>4</sub>/kg of poultry litter was sprayed onto the litter surface using a small hand pump; others served as a control that was applied without liquid KMnO<sub>4</sub> additions. Compared with controls, the treatment liquid KMnO<sub>4</sub> showed no differences in pH, total nitrogen and ammonia concentration. It was concluded that liquid KMnO<sub>4</sub> did not significantly increase poultry litter quality. Mechanisms relating to increasing litter pH and ammonia using liquid KMnO<sub>4</sub> are an oxidant agent (not acid-foaming agents).
액상 돈분에서 병원균과 가스 발생량을 감소시키기 위한 분첨가제로서 생균제의 축산환경경영평가
최인학 ( In Hag Choi ),이혁준 ( Hyuk Jun Lee ),김동현 ( Dong Hyeon Kim ),이용복 ( Yong Bok Lee ),김삼철 ( Sam Churl Kim ) 한국환경과학회 2015 한국환경과학회지 Vol.24 No.1
This study aimed to evaluate the effects of probiotics as manure additives on pathogen, mineral, carbon dioxide and methane emissions in pig slurry as a function of time and provide information about the importance of pig slurry management to pig producers. An experiment was a completely randomized design and four treatments: CON: no treatment (5 kg pig slurry), T1: 5 kg pig slurry + 0.2% bacillus subtilis, T2: 5 kg pig slurry + 0.2% yeast, T3: 5 kg pig slurry + 0.2% actinomycetales. All treatments were replicated three times. The results information that is analyzed includes the following: First, in spite of the lack of statistically significant differences, pH values and carbon dioxide were lowered (P < 0.05) in all probiotic treatments compared with the controls as a function of time. Second, all probiotic treatments had no effect on Salmonella enterica, mineral, and methane emission. The results of this study indicated that addition of 0.2% probiotic to pig slurry resulted in lower pH and carbon dioxide emissions, and carbon dioxide and methane emitted from pig slurry is not listed as noxious gases.