中文摘要：

为探讨苏北滨海滩涂土壤盐度（S）、电导率（EC）与含水率（θm）的分布状况及相互关系,采集典型滨海滩涂草滩表层土壤,测定其水土比5：1全盐量、电导率及含水率,并分析其分布规律和相互关系。结果表明：1滩涂草滩表层土壤盐度、电导率、含水率分别在0.57%～1.97%、1.6～5.0mS/cm、25.2%～28.7%之间,盐度和电导率均表现为芦苇滩〈碱蓬滩〈互花米草滩,而含水率则表现为芦苇滩〉碱蓬滩≈互花米草滩。2盐度和电导率相关性极显著（r=0.99,p〈0.01）,关系式为：S（%）=0.408 2EC（mS/cm）-0.112 1;3各演替带土壤盐度、电导率与含水率的相关性均不显著（p〉0.05）,但滩涂草滩总体上表现为土壤盐度、电导率与含水率呈极显著负相关关系（rS=-0.52,rEC=-0.50,p〈0.01）;且当土壤盐度低于1%时,盐度、电导率与含水率负相关更为显著（rS=-0.71,rEC=-0.71,p〈0.01）;而盐度高于1%时,相关性则不显著（p〉0.05）。滩涂草滩表层土壤盐度除受到植物、海水影响外,降水等淡水来源以及土壤本身特性可能也是重要的影响因素。

英文摘要：

In order to explore the distribution and the relationship among soil conductivity（EC）,salinity（S）and water content（θm）in tidal flats,forty surface soil samples were collected in various successions in a pristine tidal flat in Jiangsu Province,and the related indexes were analyzed.The results showed that S,ECandθm were 0.57%～1.97%,1.6～5.0mS/cm and 25.2%～28.7%,respectively.Both Sand ECin successions showed Spartina alterniflora flat Suaeda salsa flatPhragmites australis flat,andθm showed Spartina alterniflora flat≈ Suaeda salsa flat Phragmites australis flat.There was a significant correlation between Sand EC（r=0.99,p〈0.01）,and the function was：S（%）=0.408 2 EC（mS/cm）-0.112 1.The correlation between S,ECandθmin each successions were not significant（p〈0.05）,however,significant negative correlations（rS=-0.52,rEC =-0.50,p〈0.01）were found in the whole tidal flat.When S was lower than 1%,the correlations between S,ECandθm were more significant（rS=-0.71,rEC=-0.71,p〈0.01）,and the correlations were not significant（p〈0.05）when S was higher than 1%.The salinity in the surface soil in the tidal flat was influenced greatly by fresh water such as precipitation and the soil characteristics,besides seawater and plants in tidal flat.