黄桂云 张国禹 蔡玉鹏 邱利文 韩馥 杨培全

摘要 消落带土壤含水率与电导率是影响植物的生长的指标。以三峡库区消落带为研究对象，研究土壤含水率、电导率在不同区域、水位高程及土层的空间变异特征。结果表明：三峡库区沿线各消落带样点土壤含水率在地理空间上表现出一定差异性，低海拔区比高海拔区土壤含水率高，土壤含水率随着土层深度的增加而呈减小趋势;土壤电导率分布区间为0.21～0.42 mS/cm，在地理空间上表现出一定的空间变异性，其中向阳村电导率最高，且与其他调查点差异显著;除少数调查点外，大多调查点电导率在不同海拔高度和土层间的差异性不显著。

关键词 消落带;土壤含水率;土壤电导率

中图分类号 S 152  文献标识码 A  文章编号 0517-6611（2021）21-0091-02

doi：10.3969/j.issn.0517-6611.2021.21.022

开放科学（资源服务）标识码（OSID）：

Spatial Variability of Soil Water Content and Electrical Conductivity in Water Level Fluctuating Zone of Three Gorges Reservoir Area

HUANG Gui-yun  ZHANG Guo-yu  CAI Yu-peng2 et al

（1.Yangtze River Rare Plant Research Institute， Operation and Administration Center for River Basin Hydro Complex， China Three Gorges Corporation， Yichang， Hubei， 443000; 2. Changjiang Institute of Survey， Planning， Design and Research，Wuhan，Hubei 430010）

Abstract Soil water content and electrical conductivity can affect the growth of plants.The spatial variation characteristics of soil moisture content and electrical conductivity in different regions， water level elevation and soil layer were researched in the water level fluctuating zone of the Three Gorges Reservoir Area. The results showed that： the soil moisture content of the sample points in the fluctuating zone showed certain differences in geographical space. The soil moisture content was higher in low altitude area than that of high altitude area， and it was increased with the depth of soil layer. The distribution range of soil conductivity was 0.21-0.42 mS/cm， which showed a certain spatial variability in geographical space. The conductivity in Qukou Town was the highest， and the difference was significant with other survey points. Except for a few survey points， the difference of conductivity in different water level and soil layers was not significant in most survey points.

Key words Water level fluctuating zone;Soil moisture content;Soil conductivity

作者簡介 黄桂云（1971—），女，安徽金寨人，正高级工程师，从事长江流域特有珍稀植物研究保护及陆生生态修复研究。

*通信作者，高级工程师，硕士，从事水生态保护与修复研究。

收稿日期 2021-03-02

三峡水库采用“蓄清排浑”的水库运行调度机制，每年9月底开始蓄水，次年1月开始放水，库区形成一个落差30 m，总面积为349 km2的消落带[1-2]。三峡库区已经经历数次淹水和落干，形成了一种特殊的湿地，是水体与陆地生态系统的过渡带，承担着库区水域和陆地之间物质运输、能量交换和信息传递等任务。同时，水位的涨落造成了消落带不同高程不同深度的土壤的有机质、全氮、全磷、速效磷等养分含量的大量流失，使得土壤理化环境发生了变化[3-5]。……