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Physiological Characteristics and Yield of Onion Affected by Rapid Temperature Changes
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 Title & Authors
Physiological Characteristics and Yield of Onion Affected by Rapid Temperature Changes
Lee, Hyeong-Jin; Han, Hyo-Shim; Chon, Sang-Uk; Kim, Dong-Kwan; Kwon, Hyun Sook; Lee, Kyung Dong;
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BACKGROUND: To evaluate the impact of rapid temperature change at spring and the early summer seasons in climate change, we have investigated the physiological response and yield of onion in a greenhouse with thermostat control system. METHODS AND RESULTS: Seedlings of onion(cv. Sunshine) were planted on October 30, 2012 and harvested on May 30, 2013. The used treatments(March-April-May) for a rapid temperature change were T0(control): , T1: , T2: and T3: . Total yields of bulb within the temperature change as high temperature treatment T2 and control treatment T0 were increased significantly(p<0.05), as compared to the low temperature treatment T1. Low temperature conditions significantly (p<0.05) reduced plant height, SPAD reading, crude protein and fiber etc., as compared to the TO and T2. CONCLUSION: The rapid temperature changes were highly affected by low temperature than high temperature. These results suggest that rapid climate change of future could need systematic standard model for physiological characteristics and yields of onion.
Climate change;Onion;Physiological response;Yield;
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