土壤中盐分含量对EM38大地电导仪测量精度的影响分析  

Influence of soil salt contents on the measureinh accuracy of EM38

作　　者：夏英辉[1,2] 熊黑钢[3,2] 

机构地区：[1]新疆大学资源与环境科学学院,乌鲁木齐830046 [2]教育部绿洲生态重点实验室,乌鲁木齐830046 [3]北京联合大学应用文理学院城市系,北京100083

出　　处：《干旱区资源与环境》2013年第10期163-168,共6页Journal of Arid Land Resources and Environment

基　　金：国家自然科学基金(41171165);北京市属高等学校人才强教计划项目(PHR200906125)资助

摘　　要：通过对EM38测量的表观电导率(EM)与土壤浸提液电导率(EC)之间的回归模型的建立,确定其间的最佳回归模型并分析其拟合精度;据此基础上对土壤的含盐量与预测误差之间建立了回归方程。结果表明:土壤(EC)电导率与其表观电导率(EM)之间有显著的相关性,且EM38测量的预测误差和盐分含量之间的模型为对数方程,因此测量较高盐分含量的土壤时会得到较好的预测效果。By the establishment of regression models between EM38 apparent conductivity measurement（EM） and extraction of soil hydraulic conductivity（EC）,the best fitting regression model was determined and its precision was analyzed.Thus the regression equation between soil salinity and prediction error has been established.The results showed that there is a significant correlation between soil（EC） conductivity and apparent conductivity（EM）;the model of forecast error of EM38 measuring and the salt content is logarithmic equation.So when measuring the high salt content of the soil will get a better forecast results.

关 键 词：EM38 回归分析 残差 误差比重 

分 类 号：S151.9[农业科学—土壤学]