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Abstract
The effect of intermittent water stress in relation to solar radiation (0.60 MJ m-2) received by the plant and nutrient solution electrical conductivity (EC) on dry matter production in rice crop was studied. The rice plants were grown using nutrient film technique (NFT). Two intermittent water stress treatments [CC= Continuous circulation of nutrient solution throughout the life cycle and RS= Water stress was imposed from panicle initiation (PI) to maturity of the crop) and two levels of nutrient solution EC (3.0 mS cm-1 and 2.0 mS cm-1) were used. Results revealed that drought stress significantly decreased the dry weight (DW) of leaf, stem, panicle, root and whole plant. Plant grown in EC 3.0 solution produced more DW than EC 2.0 solution. Due to drought stress, DW decreased more in the EC 3.0 plants than in the EC 2.0 plants. Tiller and leaf number did not decrease due to drought stress but plant height, leaf area and panicle number decreased.