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여러 제형의 발효홍국 어성초를 오리사료첨가제로 적용한 현장연구에서 오리축산경영의 경제성 평가
장우환 ( Woo-whan Jang ),정영호 ( Yung-ho Chung ),최인학 ( In Hag Choi ) 한국환경과학회 2018 한국환경과학회지 Vol.27 No.5
The influence of various forms of Houttuynia cordata with fermented red koji as feed additives on the performance of duck livestock was evaluated through a field study. Two hundred and forty ducks (Pekins) aged 0-38 d were used. They were randomly assigned to four treatment groups (0%, 1% H. cordata powder with fermented red koji, 1% H. cordata pelleted with fermented red koji, and 1% H. cordata coated with fermented red koji) with four replicates (15 ducks per replication). Foreconomic evaluation, the data (a total of 240 duck) obtained from each treatment were applied to 10,000 ducks per treatment 38-d after the feeding trial. Overall, the results of economic evaluation were the highest in the treatment with 1% H. cordata coated with fermented red koji, followed by 1% H. cordatapelleted with fermented red koji, 1% H. cordatapowder with fermented red koji, and control. In conclusion, using 1% H. cordatawith fermented red koji as coating and pellet type duck diets might be of economic advantage for sustainable environmental management.
FTA 체결에 대비한 임산물 경쟁력 수준과 수출전략품목 분석
장우환 ( Woo Whan Jang ),권용덕 ( Yong Duck Kwon ) 한국산림과학회 2005 한국산림과학회지 Vol.94 No.1
This paper examines the relative competitive position of korean forest products market over period of 1999 to 2003 and selects strategic exported goods from its position provide against concluding FTA agreement with China, Japan and ASEAN. The poilfolio approach is used to develope competitiveness-market share matrix. The position of major export countries on the competitiveness-market share matrix will be in one of nine cells, with differing implications for their role in korean forest products market. Based the competitiveness-market share matrix, Major export countries are divided into first cell type. third cell type and ninth cell type and the items of ninth cell type are chosen as strategic exportable goods.
곤충분말 사료를 오리사료에 첨가 시 생산성과 경제성에 대한평가
장우환 ( Woo-whan Jang ),정태호 ( Tae-ho Chung ),최인학 ( In-hag Choi ) 한국환경과학회 2019 한국환경과학회지 Vol.28 No.8
The effect of insect feed powder on the growth performance and economic evaluation of ducks was investigated. One hundred and twenty-old Pekin ducks were randomly assigned to two dietary treatments (0% and 1% Hermetia illucens powder) with three replicates of 20 birds each for 14-42 d. No significant (p>0.05) difference in growth performance between the control and 1% H. illucens powder was observed, except the feed conversion ratio (p<0.05), for the experimental period. The treatments with 1% H. illucens powder improved the economic indicators in comparison with the controls. Therefore, a diet supplemented with 1% H. illucens powder could significantly improve the feed conversion ratios and increase the economic indicators.
장우환 Jang Woo-Whan 한국농촌경제연구원 2003 농촌경제 Vol.26 No.3
The purpose of this study is to figure out the necessity of forest insurance, by surveying forest insurance related questionnaires such as understanding of forest disaster control systems, preference of forest insurance types, and willingness to buy the insurance for forest owners. Therefore, this study can present the basic information for establishing a new forest insurance market. The willingness to buy the insurance for forest owners estimated by logit model and probit model. The result is shown that the older forest owner and group forest owner the probability of willingness to buy the insurance is decreased. But, In the case of more government subside to forest insurance payment, larger forest owner the probability of willingness to buy the forest insurance is increased.