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Changes in Tomato Growth and Productivity under Different Night Air Temperatures  

Kang, Yun-Im (Floriculture Research Division, National Institute of Horticultural & Herbal Science)
Kwon, Joon-Kuk (Protected Horticulture Research Station, National Institute of Horticultural & Herbal Science)
Park, Kyoung-Sub (Protected Horticulture Research Station, National Institute of Horticultural & Herbal Science)
Choi, Gyeong-Lee (Protected Horticulture Research Station, National Institute of Horticultural & Herbal Science)
Roh, Mi-Young (Director General for Planning & Coordination, Rural Development Administration)
Cho, Myeong-Whan (Protected Horticulture Research Station, National Institute of Horticultural & Herbal Science)
Kim, Dae-Young (Vegetable Research Division, National Institute of Horticultural & Herbal Science)
Kang, Nam-Jun (Inst. of Agric. & Life Sci., Gyeongsang National University)
Publication Information
Journal of agriculture & life science / v.46, no.6, 2012 , pp. 25-31 More about this Journal
Abstract
This study aimed to investigate the effect of night temperature on the productivity, growth, and fruit characteristics of tomatoes and set the optimal night air temperature. Tomatoes (Solanum lycopersicum Mill. cv. Superdoterang and cv. Rapito) were grown at 5, 10, 15, and $20^{\circ}C$ during night time and ventilation temperature point during day time set $27^{\circ}C$. Depending on night air temperature, plant height, leaf area, fresh and dry weight of each organ, leaf, stem, and root were changed. Condition of high night temperature resulted in promotion of tomatoes growth with high dry weight and fresh weight. However, the dry weight under night temperature $20^{\circ}C$ decreased, especially, in 'Superdoterang'. On changes of yield, 'Rapito' showed higher productivity than 'Superdoterang' and the highest productivity point for nigh temperature is $13.32^{\circ}C$ for 'Superdoterang' and $14.25^{\circ}C$ for 'Rapito'. Although the total yield decreased from the point, the daily productivity increased with increasing night temperature, the highest point for nigh temperature is $14.45^{\circ}C$ for 'Superdoterang' and $16.46^{\circ}C$ for 'Rapito'. High temperature deceased the fruit weight and increased total soluble solid content in fruits. It is concluded that the night air temperature changes productivity of tomato and the temperatures between productivity and growth velocity have differences depending on different cultivars. scores than the other beef jerky samples (p<0.05).
Keywords
Dry weight; Fruit weight; Total soluble solid; Yield;
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