| Cite this article: | 汪顺生,武闯,柳腾飞.畦灌条件下不同水肥处理对麦田水氮运移的影响[J].灌溉排水学报,2022,(12):-. |
| wangshunsheng,Wu Chuang,Liu Tengfei.畦灌条件下不同水肥处理对麦田水氮运移的影响[J].灌溉排水学报,2022,(12):-. |
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| DOI： |
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| Effects of different water and fertilizer treatments on water and nitrogen transport in wheat field under border irrigation |
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wangshunsheng1, Wu Chuang2, Liu Tengfei2
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1.North China University of Water Resources and Electric Power;2.School of Water Conservancy, North China University of Water Resources and Electric Power
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| Abstract: |
| Abstract: 【Objective】 To investigate the effects of different water and fertilizer gradients on soil water and nitrogen distribution in winter wheat growing period. 【Method】 Based on field experiment, the characteristics of soil water and nitrogen transport in root area of wheat field under border irrigation were numerically simulated using HYDRUS model. 【Results】 The HYDRUS model could well simulate the distribution of soil water and nitrogen in root zone. The coefficient of determination (R2) of simulated and measured values was greater than 0.84, RMSE and MAE were less than 0.807 and 0.695, respectively. When the lower limit of soil water control was raised, irrigation increased the number of times during the growing period of wheat, and nitrate nitrogen content in the surface layer decreased significantly in 0～20 cm soil layer and migrated to 20～100 cm soil layer over time within 1～2 days after irrigation, while irrigation had no significant effect on ammonium nitrogen content in each soil layer. With the increase of nitrogen application rate, the contents of nitrate nitrogen and ammonium nitrogen in 0～60 cm soil layer of winter wheat increased significantly, and the contents of nitrate nitrogen and ammonium nitrogen in 0～40 cm soil layer increased significantly compared with other soil layers, while the water content in 0～40 cm soil layer decreased with the increase of nitrogen application rate. 【Conclusion】 The HYDRUS model can better simulate the distribution of water and nitrogen in soil under different water and nitrogen treatments, and the simulation results can provide a scientific basis for exploring the water and fertilizer management system of wheat field with border irrigation and reducing the risk of nitrogen leaching. |
| Key words: Nitrogen distribution; Distribution of soil moisture content; Border irrigation. Winter wheat; HYDRUS simulation |
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