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KMID : 0903620040450030127
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Journal of the Korean Society for Horticultural Science
2004 Volume.45 No. 3 p.127 ~ p.130
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Evaluation of Irrigation System by Balance and Integrated Solar Radiation on Fruit Quality of Muskmelon in a Closed Perlite Culture System
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Kim Hye-Jin
Kim Young-Shik
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Abstract
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Three types of irrigation treatments were set up to evaluate the irrigation management by hanging balance and integrated solar radiation (ISR) in a closed perlite culture system. Two irrigation regimes were controlled by hanging balance at two drainage rates; high and low levels were between 10?15% (dr-H) and 1?5% (dr-L), respectively. Another regime was controlled by specific ISR of 576 kJㆍm?². The weighing system could control the amount of irrigation accurately up to 0.05 ㎏. The amount of irrigated solution by balance was high in dr-H and low in dr-L. The amount of irrigated solution by ISR was more on the day of daily ISR of 16.6 MJㆍm?² than 11.3 MJㆍm?². The water content in perlite controlled by balance was steadily maintained on the level of 26% in dr-H, and 22% in dr-L during the irrigation period, whereas the water content in perlite controlled by ISR varied greatly between about 23 to 26%. Drainage rate was very different among the treatments as 14.3% in dr-H and 51% in ISR-576 on the day of daily ISR of 11.3 MJㆍm?². Soluble solid content was high in ISR-576 and low in dr-L. Fruit fresh weight was higher in dr-H than that in other treatments. Accordingly irrigation management by balance in perlite culture in a closed system seems to be good for fruit quality and economic use of water and nutrient solution.
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KEYWORD
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Cucumis melo, hydroponics, weighing sensor, weighing system
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