적색광 처리시기 및 광도가 오이 및 토마토 플러그묘의 생장에 미치는 영향

초록

This study was established to control the overgrowth of cucumber and tomato plug seedlings bycontrolling of irradiation timings and light intensities of red (R) light. Compared with the control, end-of-day(EOD) timing of R irradiation significantly reduced the seedling heights by 21.3% and 14.2% in cucumberand tomato, respectively. In addition, both plant seedlings treated with R light at EOD timing had the thick-est stem diameter. Tomato seedlings treated with R light at EOD showed the highest chlorophyll content andthe smallest leaf size. Dry weights of above ground plant tissue in both plant seedlings were significantlyreduced by EOD R light treatment. And both plant seedlings treated with EOD treatment had the lowest T/Rratio, and the highest compactness rates. The increased intensities of R light resulted in the shorter plantheights in cucumber and tomato plant seedlings. It also reduced the length of hypocotyls and internodes andthe size of leaves in the both seedlings. Elevated R light intensities tended to increase the stem diameter andchlorophyll contents. Dry weights of above ground plant tissue and roots in both plant seedlings werereduced by the elevated R irradiation. Cucumber seedlings treated with 2 and 8 mol-1 -2 -1 and tomatoseedlings treated with 8 mol-1 -2 -1 had significantly lower T/R ratio than other treatments tested.

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