급변온도 변이에 따른 양파의 생리적 특성 및 수량 변화
Physiological Characteristics and Yield of Onion Affected by Rapid Temperature Changes
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BACKGROUND: To evaluate the impact of rapidtemperature change at spring and the early summerseasons in climate change, we have investigated thephysiological response and yield of onion in agreenhouse with thermostat control system. METHODS AND RESULTS: Seedlings of onion(cv. Sunshine) were planted on October 30, 2012 and harvestedon May 30, 2013. The used treatments(March-April-May)for a rapid temperature change were T0(control):6.0-10.4-17.2℃, T1: 6.0-5.4(-5)-17.2℃, T2: 6.0-10.4-22.2(+5)℃ and T3: 6.0-5.4(-5)-22.2(+5)℃. Total yields of bulbwithin the temperature change as high temperaturetreatment T2 and control treatment T0 were increasedsignificantly(p<0.05), as compared to the low temperaturetreatment T1. Low temperature conditions significantly(p<0.05) reduced plant height, SPAD reading, crude proteinand fiber etc., as compared to the TO and T2. CONCLUSION: The rapid temperature changes werehighly affected by low temperature than high temperature. These results suggest that rapid climate change of futurecould need systematic standard model for physiologicalcharacteristics and yields of onion.
Abstract
BACKGROUND: To evaluate the impact of rapidtemperature change at spring and the early summerseasons in climate change, we have investigated thephysiological response and yield of onion in agreenhouse with thermostat control system. METHODS AND RESULTS: Seedlings of onion(cv. Sunshine) were planted on October 30, 2012 and harvestedon May 30, 2013. The used treatments(March-April-May)for a rapid temperature change were T0(control):6.0-10.4-17.2℃, T1: 6.0-5.4(-5)-17.2℃, T2: 6.0-10.4-22.2(+5)℃ and T3: 6.0-5.4(-5)-22.2(+5)℃. Total yields of bulbwithin the temperature change as high temperaturetreatment T2 and control treatment T0 were increasedsignificantly(p<0.05), as compared to the low temperaturetreatment T1. Low temperature conditions significantly(p<0.05) reduced plant height, SPAD reading, crude proteinand fiber etc., as compared to the TO and T2. CONCLUSION: The rapid temperature changes werehighly affected by low temperature than high temperature. These results suggest that rapid climate change of futurecould need systematic standard model for physiologicalcharacteristics and yields of onion.
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