Salinity: Electrical conductivity and total dissolved solids
Salinity: Electrical conductivity and total dissolved solids
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DOI：
10.2136/msa2015.0039
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发表时间：
2017-08
影响因子：
2.9
通讯作者：
D. Corwin;Kevin Yemoto
中科院分区：
文献类型：
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作者：
D. Corwin;Kevin Yemoto
土壤盐度的测量是对土壤液体部分中存在的总盐的量化。土壤盐度在农业中很重要，因为盐度会降低渗透势，使植物更难提取水分，引起特定离子毒性，破坏植物的营养平衡，并影响土壤的倾斜度和渗透性，从而降低作物产量。讨论了测量土壤盐分的原理、方法和设备。讨论提供了背景、原理、设备以及当前接受的程序和方法的基本知识，用于在实验室中使用土壤样品水提取物的电导率测量土壤盐分，并测量饱和土壤提取物中的总溶解固体。还关注使用吸盘提取器、多孔基质或盐度传感器、电阻率和电磁感应来测量土壤蒸渗仪柱和小田地（<10 x 10 m）中的盐度。土地资源管理者、生产者、推广专家、自然资源保护服务现场工作人员、本科生和研究生以及大学、联邦和州研究人员是所提供信息的受益者。
The measurement of soil salinity is a quantifi cation of the total salts present in the liquid portion of the soil. Soil salinity is important in agriculture because salinity reduces crop yields by reducing the osmotic potential, making it more diffi cult for the plant to extract water, by causing specifi c-ion toxicity, by upsetting the nutritional balance of plants, and by aff ecting the tilth and permeability of a soil. A discussion of the principles, methods, and equipment for measuring soil salinity is presented. The discussion provides a basic knowledge of the background, principles, equipment, and current accepted procedures and methodology for measuring soil salinity in the laboratory using electrical conductivity of aqueous extracts from soil samples and measurement of total dissolved solids in the saturated soil extract. Attention is also given to the use of suction cup extractors, porous matrix or salinity sensors, electrical resistivity, and electromagnetic induction to measure salinity in soil lysimeter columns and small fi eld plots (<10 by 10 m). Land resource managers, producers, extension specialists, Natural Resource Conservation Service fi eld staff , undergraduate and graduate students, and university, federal, and state researchers are the benefi ciaries of the information provided.