干旱区生态环境知识资源中心(Arid): 土壤盐分的原位测定方法

Arid

	土壤盐分的原位测定方法
其他题名	In-situ Determination Methods for Soil Salinity
	刘梅先; 杨劲松
来源期刊	土壤
ISSN	0253-9829
出版年	2011
卷号	43 期号:5 页码:688-697
中文摘要	在干旱半干旱地区，土壤盐渍化是制约农业生产的重要因素。土壤盐分的测定和诊断是土壤盐渍化研究工作中的重要内容，传统上一般通过测定土壤浸提液电导率来测定土壤盐分，过程繁琐，费时费事，不可避免地要破坏原土样。在提倡精准农业的今天，土壤盐分的快速、有效和可靠的原位测定显得非常重要。土壤盐分原位测量方法有多种，在原理上可分为土壤溶液电导率法和土壤表观电导率法两大类。在现有条件下，土壤溶液电导率可通过原位采集土壤溶液后在实验室测定和用土壤盐分传感器直接测定；土壤表观电导率法主要通过四电极、电磁感应仪和时域反射仪测定。本文分析了不同方法和各种仪器的基本原理，探讨了不同方法的优缺点和发展前景，为土壤盐渍化研究中盐分测定方法的选用提供参考。
英文摘要	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.
中文关键词	土壤盐分 ; 原位测定 ; 四电极 ; 电磁感应仪(EM38) ; 时域反射仪(TDR)
英文关键词	Soil salinity In situ determination Four-electrode method Electromagnetic induction measurements(EM38) Time domain refletrometry(TDR)
类型	Article
语种	中文
国家	中国
收录类别	CSCD
WOS类目	Agriculture
WOS研究方向	Agriculture
CSCD记录号	CSCD:4347276
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/227160
作者单位	刘梅先, 中国科学院南京土壤研究所, 土壤与农业可持续发展国家重点实验室, 南京, 江苏 210008, 中国.; 杨劲松, 中国科学院南京土壤研究所, 土壤与农业可持续发展国家重点实验室, 南京, 江苏 210008, 中国.
推荐引用方式 GB/T 7714	刘梅先,杨劲松. 土壤盐分的原位测定方法[J],2011,43(5):688-697.
APA	刘梅先,&杨劲松.(2011).土壤盐分的原位测定方法.土壤,43(5),688-697.
MLA	刘梅先,et al."土壤盐分的原位测定方法".土壤 43.5(2011):688-697.