Many water-saving techniques have been developed for rice production in response to\nirrigation water scarcity. The selection of the water-saving methods and the optimum thresholds for\nobtaining maximum benefits of these regimes are largely site-specific depending mainly on soil\ntype, soil texture, and the environment. A two-year (2017 and 2018) experiment was conducted to\nevaluate the response of the agronomic growth performance, yield, and water use of super rice\nvarieties under different irrigation regimes in Jiangsu Province, China. The irrigation regimes were\ncomprised of different water-controlled thresholds, in different growth stages. Treatments included\ntraditional flooding irrigation (FI, as the control) and the following four water-saving irrigation\n(WSI) regimes: shallow adjusting irrigation (WSI1), rainwater-catching and controlled irrigation\n(WSI2), controlled irrigation (WSI3), and drought planting with straw mulching (WSI4). The results\nshowed that WSI treatments significantly increased the irrigation water use efficiency by 20.60% to\n56.92% as compared with FI. The WSI treatments significantly decreased the crop\nevapotranspiration during the rice growth period. .........................
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