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| DOI： |
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| Study on the Appropriate Water Saving Irrigation Mode of Rice in North Hubei Province |
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LIU Luguang, WU Xia, TAN Junwei, ZHANG Jiantao, CAO Junlong
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Hubei Water Resources Research Institute, Wuhan 430070， China;State Key Laboratory of Water Resources and Hydropower Science, Wuhan 430070, China;Changqu Experiment Irrigation Station, Xiangyang 441400, China)
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| Abstract: |
| According to water shortage of North Hubei Province, the ORYZA model was calibrated and validated with the results of experiments of Changqu Experimental Irrigation Station. The current irrigation modes, including storage irrigation mode, shallow mode and wet irrigation mode, were analyzed using ORYZA model. According to the different lower limit of irrigation and irrigation quotas, the different irrigation modes were set. The different irrigation modes were optimized with the rice growth model. The appropriate irrigation mode of rice in Northern Hubei Province was proposed that the store-rainfall depth was 60 mm; The irrigation lower limit was 0 mm at returning green stage and flowering stage, and eighty percent of saturated soil water content at other growth period; The moisture dry naturally in yellow ripe stage; The irrigation quota was 30~40 mm. |
| Key words: model; irrigation mode; optimized |
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