农田土壤中硝态氮垂直运移参数的确定
etermination of nitrate vertical transport parameters in farmland soil
本文针对利用溶质运移模型预测预报农田土壤中硝态氮垂直运移时，运移参数不易获得的问题，引入CXTFIT分析模型来求农田土壤中硝态氮垂直运移的参数。结果表明：用CXTFIT模型模拟的硝态氮穿透曲线与实测的硝态氮穿透曲线基本吻合，模型的模拟值与实测值相比，误差范围在3% 以下，相关系数达到0.9 以上；在模拟过程中可同时得到硝态氮垂直运移的弥散系数和平均孔隙水流速（average pore-water velocity）等参数。因此该模型可以直接用来确定农田土壤中硝态氮垂直运移的参数。
XTFIT analytical model was used to study the parameters of vertical transport in this paper. The results showed, the simulated breakthrough curves with CXTFIT analytical model are agree with the measured breakthrough curves. Compared simulating value of model with measured value, the error was below 3% and relative coefficient was over 0.9. The dispersion coefficient and the average pore-water velocity of nitrate vertical transport in simulating process were also obtained. Therefore, the CXTFIT analytical model can be used to determine the parameters of nitrate vertical transport in the farmland soil.
陈效民
农业科学研究环境科学基础理论环境污染、环境污染防治
农田土壤硝态氮运移参数
farmland nitrate transport parameter
陈效民.农田土壤中硝态氮垂直运移参数的确定[EB/OL].(2004-05-03)[2025-08-16].http://www.paper.edu.cn/releasepaper/content/200405-11.点此复制
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