运用DRAINMOD-NⅡ模拟平原河网地区稻田排水氮素流失量

Simulation of nitrogen loss for rice field drainage in plain river network area by using DRAINMOD_NⅡ model

运用DRAINMOD-NⅡ模型模拟分析了江苏省临湖灌区不同排水间距对排水量和氮素流失量的影响。结果表明,排水量受排水间距影响较大,氮素流失量在水稻生长前期受施肥和排水间距影响较大,氮素流失量与排水量变化趋势基本一致,控制排水可以有效地降低稻田氮素流失。

The DRAINMOD-N Ⅱ model was used to simulate and analyze the effects of different drainage spacing on drainage and nitrogen loss in the Linghu irrigation area of Jiangsu Province. The results show that water discharge is greatly affected by the drainage spacing, the nitrogen loss is greatly affected by the fertilization and drainage spacing. The variation trend of nitrogen loss and drainage is basically the same, so controlling drainage can effectively reduce nitrogen loss in paddy fields.