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| DOI：10.13522/j.cnki.ggps.20190282 |
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| Analysis of WUE for main crops and water-saving potential in the Beijing-Tianjin-Hebei region in 1957―2015 |
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CUI Qiuli.
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Henan Zhongtian Tendering Agency Co., Ltd., Zhengzhou 450000, China
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| Abstract: |
| 【Objective】Water shortage and low agricultural water use efficiency have restricted the implement of national strategy for Beijing-Tianjin-Hebei integration. The purpose of this paper is to improve the water use efficiency (WUE) of main crops and alleviate water conflicts of the Beijing-Tianjin-Hebei region. 【Method】This study estimated the water consumption and water use efficiency of winter wheat and summer maize in the Beijing-Tianjin-Hebei region from 1957 to 2017 and the corresponding water-saving potential based on the FAO: Penman-Monteith Formula and the effective precipitation. 【Result】The WUE of winter wheat and summer maize showed linear increasing trends. According to previous relevant experimental work, the WUE could be improved by 20%～30%. The volume of water-saving is about 4.36 billion m3 to 6.04 billion m3. The water-saving potential of winter wheat is higher than that of summer maize.【Conclusion】The WUE can be increased by improving soil conditions, optimizing irrigation management and straw mulching. |
| Key words: water-saving potential; water use efficiency; Beijing-Tianjin-Hebei region; winter wheat; summer maize |
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