EM38大地电导率测量仪在滨海盐土电导率测量中的应用及其优势

Application and predominance of EM38 equipment in measuring electrical conductivity of coastal saline soil

采用EM38大地电导率测量仪测量浙江省上虞市海涂围垦区一块面积为2 hm2的水稻田的表观电导率。测定结果与相同点位采样室内分析数据有很好的相关性,与传统方法相比优势明显。结合地统计克立格插值,分析比较该田块土壤电导率分布趋势图和水稻产量分布趋势图,结果表明,在电导率较高的田块东南片,其相应的水稻产量很低。因此,EM38测量结果可用于农田精确管理,并极大地提高土壤调查的效率。

EM38 equipment was used to measure apparent electrical conductivity on a 2 hm^2 field on a reclaimed saline land in Shangyu city, Zhejiang province. There was a significant correlation between measured data in situ by EM38 and the corresponding analyzed data of soil sample in laboratory. Spatial distribution maps of soil electrical conductivity and rice yield were compared using Kriging interpolation. The southeast field with high electrical conductivity correspondingly had low rice yield. The results show that EM38 equipment has some advantages as compared with conventional investigation approaches. It owns tremendous potential in the soil investigation and site-specific management of farm land.