적색광에 의한 딸기재배의 일장연장 효과
Effects of Daylength Extension by Red Light in Strawberry Cultivation
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초록
BACKGROUND: Many strawberry growers are utilizingdaylength extension by using incandescent bulb orfluorescent lamp to break dormancy of strawberry inducedby low temperature and short day conditions. Conventionalincandescent bulb and fluorescent lamp consume a lot ofelectricity and have short longevity. Red light known formost efficient wavelength for daylength extension light ofshort-day plant and long-day plant. This study wasconducted to verify the effects of red light to enhancegrowth and to increase production of strawberry (Fragaria ×ananassa Duch. cvs. “Seolhyang”)METHODS AND RESULTS: Three red light (660nm) of0.70, 0.87, and 1.05 μmol/m2/s (PAR) and conventionalincandescent bulb of 40 Lux were treated respectivelyunder the pot experiment. All treatment irradiated from18:00 to 24:00 for 6 hours. Red light treatment tend toincrease leaf stem number, flower stem number, weight offlower stem, crown weight, root weight, and leaf area ofstrawberry then incandescent bulb treatment. In field experiment, red light of 0.7 μmol/m2/s (PAR) andconventional incandescent bulb of 40 Lux were irradiatedrespectively. Field experiment showed that the leaf number,leaf weight, and crown weight of strawberry increased thanthose of incandescent bulb control with red LED of 0.7 μmol/m2/s (PAR). Red LED treatment increased the fruitnumber over 15g than incandescent bulb. Furthermore, redLED treatment decreased fruit number below 15g ofstrawberry than incandescent bulb treatment. Therefore,We believed that red LED treatment increased marketablefruit number by increment of weight of each fruit. Consequently, marketable fruit number, fruit weight, andfruit production of strawberry were increased than those ofincandescent bulb by 5 %, 2.9 %, and 8.5 % respectively,but not showed significantly differences. CONCLUSION: These results presumably due to directlyenhanced photosynthesis of strawberry leaves and activatedaction of Pfr phytochrome form by red light. In conclusion,red LED of 660nm could be used for daylength extensionlight source to enhance production of strawberry.
Abstract
BACKGROUND: Many strawberry growers are utilizingdaylength extension by using incandescent bulb orfluorescent lamp to break dormancy of strawberry inducedby low temperature and short day conditions. Conventionalincandescent bulb and fluorescent lamp consume a lot ofelectricity and have short longevity. Red light known formost efficient wavelength for daylength extension light ofshort-day plant and long-day plant. This study wasconducted to verify the effects of red light to enhancegrowth and to increase production of strawberry (Fragaria ×ananassa Duch. cvs. “Seolhyang”)METHODS AND RESULTS: Three red light (660nm) of0.70, 0.87, and 1.05 μmol/m2/s (PAR) and conventionalincandescent bulb of 40 Lux were treated respectivelyunder the pot experiment. All treatment irradiated from18:00 to 24:00 for 6 hours. Red light treatment tend toincrease leaf stem number, flower stem number, weight offlower stem, crown weight, root weight, and leaf area ofstrawberry then incandescent bulb treatment. In field experiment, red light of 0.7 μmol/m2/s (PAR) andconventional incandescent bulb of 40 Lux were irradiatedrespectively. Field experiment showed that the leaf number,leaf weight, and crown weight of strawberry increased thanthose of incandescent bulb control with red LED of 0.7 μmol/m2/s (PAR). Red LED treatment increased the fruitnumber over 15g than incandescent bulb. Furthermore, redLED treatment decreased fruit number below 15g ofstrawberry than incandescent bulb treatment. Therefore,We believed that red LED treatment increased marketablefruit number by increment of weight of each fruit. Consequently, marketable fruit number, fruit weight, andfruit production of strawberry were increased than those ofincandescent bulb by 5 %, 2.9 %, and 8.5 % respectively,but not showed significantly differences. CONCLUSION: These results presumably due to directlyenhanced photosynthesis of strawberry leaves and activatedaction of Pfr phytochrome form by red light. In conclusion,red LED of 660nm could be used for daylength extensionlight source to enhance production of strawberry.
참고문헌 (10)
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