| Research on the water consumption rule of winter wheat in middle and late stage by drip irrigation with straw mulching in North China Plain |
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| DOI：10.7606/j.issn.1000-7601.2017.06.01 |
| Key Words: straw mulching drip irrigation winter wheat water consumption yield of winter wheat WUE North China Plain |
| Author Name | Affiliation | | WANG Jian-dong | Irrigation and Drainage Department, China Institute of Water Resources and Hydropower Research, Beijing 100048, China | | ZHAO Yue-fen | Beijing IWHR Corporation, China Institute of Water Resources and Hydropower Research, Beijing 100048, China | | ZHANG Yan-qun | Irrigation and Drainage Department, China Institute of Water Resources and Hydropower Research, Beijing 100048, China | | GONG Shi-hong | Irrigation and Drainage Department, China Institute of Water Resources and Hydropower Research, Beijing 100048, China | | SUI Juan | Irrigation and Drainage Department, China Institute of Water Resources and Hydropower Research, Beijing 100048, China | | YAN Qing-hong | Irrigation and Drainage Department, China Institute of Water Resources and Hydropower Research, Beijing 100048, China |
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| Abstract: |
| Based on the field experiments of two consecutive years (2013—2015) in North China Plain (NCP), using the Penman-Monteith Equation (P-M), FAO single crop coefficient method and water balance method, We researched and analyzed the influences of straw mulching and without mulching to the soil evaporation, water consumption, yield and water use efficiency(WUE) of winter wheat under full drip irrigation. The research results indicated that: The straw mulching under drip irrigation could notably restrained the daily soil evaporation and its fluctuation range (P＜0.05) compared with no mulching, the daily evaporation could be reduced more than 30% in middle and late period of winter wheat. Based on the field measured stomatal resistance coefficient of winter wheat, using the P-M formula to directly calculate the daily water consumption of winter wheat has possessed good accuracy. It has a high correlation with the calculated value by FAO single crop coefficient method (R2＞0.8). Though the irrigation norm could be decreased about 7%～15% by straw mulching with drip irrigation, compared with no mulching and drip irrigation, the daily water consumption and total water consumption during growth period did not existed significant difference. The daily water consumption of winter wheat was between 4.0 mm·d-1 to 4.5 mm·d-1 during April to June. The crop yield and WUE were not significantly increased under full drip irrigation with straw mulching (P＞0.05). |
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