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KMID : 0903620010420010038
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Journal of the Korean Society for Horticultural Science
2001 Volume.42 No. 1 p.38 ~ p.42
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Amount of Water Absorption , Net CO Assimilation Rate , Growth , and Yield of Cucumber Plants as Affected by Irrigation Control Method in Substrate Culture
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Roh Mi-Young
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Abstract
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This study was conducted to find out the effect of irrigation control method - control by time clock or integrated solar radiation - on the amount of water absorption, net COQ assimilation rate, growth, and yield of cucumber plants (Cucumis sativus L. cv. Eunsung Baekdadagi) in substrate culture. When the frequency and the amount of irrigation were controlled by time clock and the integrated solar radiation of 10, 20, 40, or 60 ㎈·㎝^(-2), the amount of water absorbed by one cucumber plant was the highest in the treatment of 10 ㎈·㎝^(-2), but the lowest in that of 60 ㎈·㎝^(-2). Drainage rates were 25.7 to 30.8% in perlite substrate and 23.1 to 31.4% in mixed substrate with perlite and rockwool granules when irrigation was controlled by the integrated solar radiation of 10 to 20 ㎈·㎝^(-2) and 20 to 40 ㎈·㎝^(-2), respectively. The treatment of 10 to 20 ㎈·㎝^(-2) in perlite substrate and that of 20 to 40 ㎈·㎝^(-2) in mixed substrate showed high net CO₂ assimilation rate, growth rate and yield.
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