| 用时域反射仪测定土壤溶质运移过程中的影响因素 |
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| 引用本文： | 陈效民,潘根兴,M.Vanclooster.用时域反射仪测定土壤溶质运移过程中的影响因素[J].南京农业大学学报,2000,23(2):57-60. |
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| 作者姓名： | 陈效民 潘根兴 M.Vanclooster |
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| 作者单位： | 1. 南京农业大学资源与环境科学学院,南京,210095
2. 比利时鲁汶大学农学院 |
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| 摘 要： | 通过土柱淋溶试验，研究了用时域反射仪测定土壤溶质运移过程中的影响因素。结果表明，ＴＤＲ测定溶质的浓度存在着上、下限。用Ｃａ（ＮＯ３）２作示踪剂时，ＴＤＲ测定的下限为４０ｍｇ／Ｌ；温度是另一主要的影响因素，随着温度的升高，ＴＤＲ的电阻值下降；不同流速和不同浓度均对溶质运移平衡时间有影响。由于重力势的作用，土柱上、下层之间达到平衡的时间也有显著的差异。实验中的淋洗平衡液不宜用蒸馏水或去离子水，用自来水
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| 关 键 词： | 时域反射仪 土壤 溶质运移 影响因素 |
| 修稿时间： | 1999-08-09 |
On factors influencing soil solute transport modeling by using time domain reflectometry(TDR) |
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| Chen Xiaomin,Pan Genxing,M.Vanclooster.On factors influencing soil solute transport modeling by using time domain reflectometry(TDR)[J].Journal of Nanjing Agricultural University,2000,23(2):57-60. |
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| Authors: | Chen Xiaomin Pan Genxing MVanclooster |
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| Abstract: | There were the upper and lower limits for measuring concentration scale of solution by TDR.Using Ca(NO 3) 2 as a tracer,It was found that the low limit was about 40 mg/L.The impedance of TDR decreased as the temperature increased.Different fluxes and concentrations affected balance time of solute transport.Difference in balance time was found for top and bottom soil in the columns due to the gravitational potential of leaching water.The distilled water and deionzed water could not be used as leaching balance solution in the experiment.The tap water was suggested as it elevated the conductivity baseline of soil solution. |
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| Keywords: | time domain reflectometry(TDR) soil solute transport influence factors |
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