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以排水模型(DRAINMOD)为基础发展起来的排水氮运移模型(DRAINMOD N),可用于研究排水系统对作物生长和各水文要素的影响,以及农田排水土壤中硝态氮的运动和去向,适用于浅地下水位和较湿润地区。本文对模型的氮运移原理和参数输入要求进行了详细描述,采用加拿大安大略省南部EugeneF.Whelan试验站自由排水和控制排水 地下灌溉两种水位管理条件下,1992～1994年3年来的地表径流和地下排水水量及硝态氮损失观测值对模型进行了模拟验证。图形显示和统计参数指标分析表明,模拟值与观测值拟和较好,表明模型具有良好的模拟性能,可用于预测地表、地下排水量和硝态氮的损失,是评价不同农业管理措施对土壤中氮运移的有效工具。
The DRAINMOD N model developed based on DRAINMOD can be used to study the effects of drainage system on crop growth and hydrological elements as well as the movement and location of nitrate nitrogen in agricultural drainage soil. In shallow groundwater level and more humid areas. In this paper, the principle of nitrogen transport and the parameter input requirements of the model are described in detail. Under the condition of free drainage and controlled drainage and subsurface irrigation at the Eugene F.Whelan test station in the southern part of Ontario, Canada, surface runoff over the three years from 1992 to 1994 And underground drainage water and nitrate loss observations of the model validation. Graphical display and statistical analysis of parameter indicators show that the simulated values are well simulated with the observed values, indicating that the model has good simulation performance and can be used to predict the loss of surface water, underground drainage and nitrate nitrogen, and to evaluate the effects of different agricultural management measures on soil Effective tool for nitrogen transport.