摘要
本文通过冬小麦春季生长阶段的田间试验检验了土壤水、热和氮素联合模拟模型，结果表明土壤含水量、土壤温度以及土壤无机氮含量的模拟计算值与实测值吻合程度较好．应用经检验的模型和有关参数，模拟计算了不同灌水条件下土壤氮素动态，结果看出：在本试验条件下，在冬小麦返青到收获期间，各灌水处理１ｍ深处总体上不存在土壤无机氮淋洗渗漏，而是不同程度的上升补给．反硝化和氮挥发是氮素损失的主要途径．
Based on the principle of transport the convective-dispersive model is utilized to establish a numerical model for soil nitrogen transport in field. In the model the NH4+ and NO3- are refered as soil solute, NH4+ absorpted by soil is dealed with linear model, and the processes of crop nitrogen uptake, bio-immobilization-release nitrification as well as denitricication are also to be considered. The coefficients of soil nitrogen tranform and transport are modified according to the soil moisture and soil temperature. The soil water and solute simulation model was verified by Warrick's experimental data.
出处
《水利学报》
EI
CSCD
北大核心
1996年第6期15-23,共9页
Journal of Hydraulic Engineering
基金
国家自然科学基金
关键词
土壤
田间试验
氮素运移
模拟模型
灌水
convective-dispersive model, numerical model, soil nitrogen transport.
