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| DOI：10.13522/j.cnki.ggps.20190148 |
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| Study on Revision of Middle Rice Irrigation Quota in Hubei Province |
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PAN Shaobin, LIU Luguang, WU Huirong, CUI Yuanlai, CHEN Xuxun, ZHANG Jiantao, YANG Xiaowei
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1. Hubei Water Resources Reserarch Institute\Hubei Water Saving Research Center, Wuhan 430070, China；2. WuHan University, Wuhan 430072, China
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| Abstract: |
| The current irrigation water quota standard of Hubei Province was promulgated in 2003, which has been difficult to meet the current and future water resource management needs. It is necessary to revise the irrigation quota in order to reflect the current irrigation water level of mid-season rice in Hubei Province more comprehensively and truly. In this paper, the calculation parameters of irrigation quota for mid-season rice in different districts of Hubei Province were analyzed，such as crop coefficient, leakage of paddy field, water surface evaporation in paddy field, saturated water demand, growth period and water layer control standard. Based on the analysis of influencing factors of mid-season rice irrigation quota, the mid-season rice irrigation quota of different zones and frequencies under the combination of artificial and mechanical tillage modes and shallow irrigation and intermittent irrigation modes was put forward.The results of the quota revision showed that the advanced irrigation mode and tillage mode can effectively reduce the irrigation quota of mid-season rice and promote water saving in agriculture. At present, the irrigation quota of mid-season rice under mechanical tillage and shallow irrigation is generally applicable in Hubei Province. For areas with better water source and irrigation facilities, the irrigation quota under mechanical tillage and intermittent irrigation is recommended. |
| Key words: mid-season rice; irrigation quota; calculation parameters; tillage mode; irrigation mode |
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