| 农田土壤中硝态氮垂直运移参数的确定 |
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| 引用本文： | 陈效民,刘德辉.农田土壤中硝态氮垂直运移参数的确定[J].环境科学与技术,2004,27(3):26-27,29. |
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| 作者姓名： | 陈效民 刘德辉 |
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| 作者单位： | 南京农业大学资源与环境科学学院,南京,210095;南京农业大学资源与环境科学学院,南京,210095 |
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| 基金项目： | 国家自然科学基金(49831070)，国家重点基础研究发展规划项目(G1999011806) |
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| 摘 要： | 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销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。
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| 关 键 词： | 农田土壤 硝态氮 运移参数 |
| 文章编号： | 1003-6504(2004)03-0026-03 |
Determination of Vertical Transport Parameters of Nitrate in Farmland Soil |
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| CHEN Xiao-min,LIU De-hui.Determination of Vertical Transport Parameters of Nitrate in Farmland Soil[J].Environmental Science and Technology,2004,27(3):26-27,29. |
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| Authors: | CHEN Xiao-min LIU De-hui |
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| Abstract: | CXTFIT analytical model was used to determine parameters of nitrate vertical transport, and results showed the simulated breakthrough curves with CXTFIT analytical model are agreed with 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 average pore-water velocity of nitrate vertical transport in simulating process were also obtained. |
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| Keywords: | farmland nitrate transport parameter |
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