Water dropwort(Oenanthe javanica) is grown usually in submerged paddy field and is widely used as additive in foods like Kimchi, fish soup. However, its cultivation in the under submerged cultivation has been known to cause the reduction in quality of water dropwort plants mainly due to the presence of dirt and some parasites like leeches and water animals. Thus, this study was conducted to evaluate a wetland cultivation(WLC) of water dropwort plants compared to the conventional submerged cultivation(SBC) in the greenhouse paddy field conditions. WLC and SBC treatments maintained water levels to the depth of less than 5cm and about 20cm, respectively. Vegetative stem sections were planted in September and plants were harvested in early April. The results showed that height and yield of water dropwort plants were higher in SBC than in WLC. Total yield per 10a in WLC was 12.3% lower than in SBC (2.34 vs 2.63 tons). However, the useful quality factors such as vitamin C, inorganic nutrients, chlorophyll, and anthocyanin contents were found to be considerably higher in WLC. That is Ca, K, Mg, and anthocyanin contents in the stem were increased 235%, 6%, 143% and 290%, respectively, compared to those of SBC plants. The length of underground internodes from WLC elongated about 2 times more than that of SBC, resulting in an increase in plant length and advance in harvest time. On the other hand, water dropwort plants with wetland cultivation can be produced with good cleanliness and quality, but the cultivation system should be optimized and developed to get more yield the same as SBC.

우리나라 농촌현실에 적합하면서 고품질의 친환경 농산물 생산을 위한 청정용수공급이 가능한 FDA 시스템을 개발하였다. 기존의 필터제품의 문제점을 개선하고 보다 경제적이고 기능적인 면을 고려하여 시설재배단지에 청정용수공급을 목표로 시설용수공급시스템을 개발하였다. 시설용수 공급시스템 모듈통합기법으로 개발된 FDA시스템은 여과와 흡착 그리고 자외선 모듈을 거치는 과정으로 구성되어 있다. 본 제품의 시작품 생산은 3단계의 평가과정을 거쳐 진행 되었다. 이 과정을 통해 시설용수공급시스템의 구성품별 사양을 제시하고 적정처리용량 및 모듈통합기법을 개발하였으며, 현장 설치지역(시설재배농가)의 재배현황 및 수질을 조사하여 적합한 시설용수 공급시스템 요소기술(살균, 여과)을 설계하였고, 실제 현장에 적용할 수 있는 시작품을 제작하여 현장 설치를 위한 실내 성능시험을 수행하였다. 또한 시작품 현장 설치 후 시설용수 공급시스템 유입 전․후 수질분석을 실시하였으며 모니터링을 통해 시설재배용수 온도조절장치와 폭기 장치에 대한 개선방안을 제시하여 시작품의 보완제작을 실시하였다. 시작품의 현장적용성 평가에서는 시작품의 수질정화능력평가 및 사용자 입장에서의 개선점 파악을 실시하였는데 그 결과 시스템의 수질정화능력은 목표치 이상이었으나, 수온유지, 저수조 용량문제, 누수현상, 역류현상, 적정수압유지 등의 개선점이 파악되었다.

This studies were carried out in summer season to increase high temperature tolerance using hydrogen peroxide treatments on cucumber in greenhouse. The water stress of cucumber in greenhouse by the hydrogen peroxide treatments showed as control〉250 mM〉500 mM treatments in order. The photosynthesis rate of cucumber at 30℃ did not show difference with each hydrogen peroxide treatment in temperature controlled greenhouse. However, the photosynthesis rate of cucumber in the control and hydrogen peroxide treatments at 40℃ was significantly different. The photosynthesis rate of cucumber in combined treatment with 1,000 mg·L-1 CO2 supply and hydrogen peroxide was also higher than control, however, there was no different of photosynthesis in 250 mM and 500 mM treatment. The value of Fv/Fm and Fm/Fo of chlorophyll fluorescent in 500 mM hydrogen peroxide treatment at 40℃ was highest. Also the activity of POD, the antioxidant enzyme, was higher with high hydrogen peroxide concentration than the other treatments. The high temperature limits for growth were 43℃ in the control, 44℃ in the 250 mM and 46℃ in the 500 mM according to analyze chlorophyll fluorescent Fo. The high temperature tolerance in cucumber increased approximately 3℃ by the hydrogen peroxide treatments under this experiment conditions.