| 引用本文: | 马 莉,崔宏伟,汪顺生,等.基于WHCNS模型的黄河流域麦田氮淋失与氨挥发模拟[J].灌溉排水学报,2024,43(9):105-112. |
| MA Li,CUI Hongwei,WANG Shunsheng,et al.基于WHCNS模型的黄河流域麦田氮淋失与氨挥发模拟[J].灌溉排水学报,2024,43(9):105-112. |
|
| 摘要: |
| 【目的】探究WHCNS模型对黄河流域麦田土壤氮淋失与氨挥发模拟的适用性以及不同水氮处理对土壤氮淋失和氨挥发的影响。【方法】利用田间实测数据对WHCNS模型进行率定与验证，基于校验后的模型对冬小麦返青—成熟期土壤氮淋失、氨挥发进行模拟，采用CRITIC-TOPSIS法进行水氮优选。【结果】0~100 cm土层土壤含水率、硝态氮量和0~60 cm土层土壤氨态氮量的模拟值与实测值之间的一致性指数（d）和决定系数（R2）分别介于0.84~0.97和0.67~0.99。单次施氮后7 d内的土壤硝态氮累积淋失量随着灌水次数的增加呈先增加后降低的变化趋势。不同处理施氮后7 d内的氨挥发量占氨挥发总量的93.0%~98.2%。【结论】黄河流域冬小麦最优的水氮处理为施氮量220 kg/hm2，灌水下限70%θf；最优水氮处理下的冬小麦产量为8 185.30 kg/hm2，土壤硝态氮淋失量为12 kg/hm2，氨挥发量为1.97 kg/hm2。 |
| 关键词: 冬小麦；WHCNS模型；氮淋失；氨挥发 |
| DOI：10.13522/j.cnki.ggps.2023574 |
| 分类号: |
| 基金项目: |
|
| Modelling nitrogen leaching and ammonia volatilization from wither wheat fields in the Yellow River Basin using the WHCNS model |
|
MA Li, CUI Hongwei, WANG Shunsheng, TIAN Guangzhao
|
|
1. Zhaokou Sub-center of Henan Province East Yu Water Conservancy Protection Center, Kaifeng 475000, China;
2. North China University of Water Resources and Electric Power, Zhengzhou 450046, China
|
| Abstract: |
| 【Objective】Nitrogen leaching and ammonia volatilization are major pathways for nitrogen loss in agricultural systems, influenced by various factors. This study investigates the effect of water and nitrogen management practices on these nitrogen loss pathways in winter wheat fields in the Yellow River Basin.【Method】The WHCNS model was used in our study. Field-measured data were used to calibrate the model, which was then used to simulate nitrogen leaching and ammonia volatilization during the greening and ripening stages of the winter wheat. The simulation results were analysed to optimize water and nitrogen management practices using the CRITIC-TOPSIS method.【Result】The consistency indices and coefficients of determination between the simulated and measured soil water content, nitrate nitrogen and ammoniacal nitrogen in the 0-100 cm soil layer varied from 0.842 to 0.973 and 0.666 7 to 0.988 4, respectively. Following nitrogen fertilization, the cumulative nitrate nitrogen loss via leaching from the soil increased first and then decreased with the increase in the number of irrigations in the first seven days after the fertilization. In the first seven days after the fertilization, ammonia volatilization accounted for 93.0% to 98.2% of the total ammonia volatilization. Our simulated results showed that the optimal water and nitrogen management for winter wheat in the region was to apply 220 kg/hm2 of nitrogen fertilizer and keep soil water content in the root zone above 70% of the field capacity, achieving a grain yield of 8 185.30 kg/hm2. The associated nitrate nitrogen loss was 12.011 kg/hm2 and ammonia volatilization was 1.969 kg/hm2.【Conclusion】For winter wheat in the Yellow River Basin, the optimal irrigation and nitrogen fertilization is to apply 220 kg/hm2 of nitrogen fertilizer and maintain soil moisture at no less than 70% of the field capacity. |
| Key words: winter wheat; WHCNS model; nitrogen leaching; ammonia volatilisation |
