Studies on spatial variability characteristics of available microelement contents in salinized soil.

In order to discuss the spatial variation characteristics of trace elements in typical area distributed by salinized soils,and provide references for accurate sampling in trace element diagnosis and fertilization,we carried out studies on the spatial variability characteristics of available trace element Fe,Mn,Cu,Zn,B and Mo contents by geo-statistics method in the central part of Tumochuan Plain.The results showed that the contents of available Fe,Mn,Cu,Zn,B and Mo in the soil of studied areas are 5.18 mg/kg,3.54 mg/kg,0.91 mg/kg,0.33 mg/kg,2.54 mg/kg and 0.11 mg/kg,respectively.The available Zn and Mo were relatively deficient compared to the other elements,and the 6 microelements varied at a moderate intensity.In the studied area,the spatial correlation of available Fe,Mn,Cu,Zn and Mo were moderate or weak,whereas that of available B was strong.The variation range in the 6 available microelements concentrations was ZnMnCu=FeBMo.The spatial distributions of 6 microelements showed stripped or spotting shape.