土壤2011，Vol.43Issue(5)：688-697,10.
土壤盐分的原位测定方法
In-situ Determination Methods for Soil Salinity
摘要
Abstract
Soil salinization is one of the limiting factors of agricultural productivity in arid and semi-arid regions. It is essential to determine soil salinity in a reliable but easy method. Soil salinity has been customarily defined and assessed in terms of laboratory measurements of the electrical conductivity of the extracts under different soil to water ratios, which has to destory the soil samples and is labour and time consuming. Precision agriculture requires low-cost, rapid, and reliable methods for determining soil salinity in the field. There are several approaches to determine soil salinity in situ which can be roughly classified into soil solution electrical conductivity measurement and soil apparent electrical conductivity measurement. In nowadays, soil solution electrical conductivity could be determined by measuring electrical conductivity of soil solution sampled in situ with soil solution sampler or by soil salinity sensors; soil apparent electrical conductivity could be determined by four-electrode method, electromagnetic induction and time domain refletrometry. In this paper, the basic principle, the advantages and disadvantages of different approaches or instruments and the development prospects of in situ determination of soil salinity were discussed for a reference in selection of soil salt determination method in soil salinization study.关键词
土壤盐分/原位测定/四电极/电磁感应仪(EM38)/时域反射仪(TDR)Key words
Soil salinity/In situ determination/Four-electrode method/Electromagnetic induction measurements (EM38)/Time domain refletrometry (TDR)分类
农业科技引用本文复制引用
刘梅先,杨劲松..土壤盐分的原位测定方法[J].土壤,2011,43(5):688-697,10.基金项目
公益性行业(农业)科研专项经费项目(200903001)、海洋公益性行业科研专项经费项目(201105020-3,201105020-4)、江苏省科技支撑计划项目(BE2010313)、中国科学院知识创新工程重要方向项目(KZCX2-YW-359)和国家基金项目(41171181)资助. （农业）
