Effect of heat treatment around the fruit set region on growth and yield of watermelon [Citrullus lanatus (Thunb.) Matsum. and Nakai] |
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Authors: | Jaejong Noh Jeong Man Kim Sameena Sheikh So Geun Lee Jeong Hyeon Lim Moon Ho Seong Gi Tai Jung |
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Institution: | 1. Watermelon Experiment Station, Jeonbuk A.R.E.S, Gochang, 585-863, Republic of Korea 2. Specialization Crop Research Institute, Jeonbuk A.R.E.S, Jinan, 567-807, Republic of Korea
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Abstract: | The present experiment was aimed to study the effect of imposing modulated temperature treatments 14 °C and 18 °C, around the fruiting region of watermelon plants, and to estimate the economic feasibility of the temperature treatments based on energy consumption for heating. Watermelon cultivar ‘Sambok-gul’ was selected and sown on perlite beds in a plastic house under controlled conditions at Watermelon Farm, Jeongeup-Jeonbuk, longitude 35° 31′ 47.51N, 126° 48′48.84E, altitude 37 m during the early spring season (2010–2011). The findings revealed that the temperature treatment at 18 °C caused significant increase in weight (2.0 kg plant−1), fruit weight (8.3 kg plant−1), soluble solid content (11.5 %), and fruit set rate (96.5 %) at harvest stage. Higher contents of Ca2+ and Mg2+ ions were observed in the 1st upper leaf of the fruit set node (79.3 mg L−1) and the 1st lower leaf of the fruit set node (12.0 mg L−1), respectively at 14 °C. The power consumption and extra costs of the temperature treatment 18 °C were suggested as affordable and in range of a farmer’s budget (41.14 USD/22 days). Hence, it was concluded that modulating temperature treatments could be utilized successfully to optimize the temperature range for enhancing the fruit yield and quality in the winter watermelon crops. |
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Keywords: | Temperature Electricity consumption Yield Soluble solid content Ion content |
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