盐渍土饱和泥浆与其浸提液间电导率换算关系研究

Conversion Relationship between Electrical Conductivities of Salt-affected Soil Saturated Paste and Its Extract

对30份南疆盐渍土的饱和泥浆电导率(EC_(sp))和饱和浸提液的电导率(EC_e)进行了测定分析。结果表明,每份土壤的EC_(sp)均明显小于EC_e,因此,在实际工作中不能使用EC_(sp)代替EC_e进行土壤盐度的判断;ECe与EC_(sp)间存在显著的线性关系,可以使用EC_(sp)间接推算EC_e。就南疆盐渍土而言,可以使用经验方程EC_e=2.62 EC_(sp),由EC_(sp)间接推算EC_e。

Electrical conductivity of saturated paste（ECsp） and electrial conductivity of saturated paste extract（ECe） were determined for 30 salt-affected soils in southern Xinjiang. The results showed that the value of ECspwas less than that of ECe for a given soil.Therefore,the ECevalue couldn＇t be replaced by ECspvalue to analyze soil salinity. There was significant（P〈0.01） relationship between ECspand ECe. Thus, ECspcan be used to estimate ECebased on an regression equation of ECe=2.62 ECspfor salt-affected soils in southern Xinjiang.