卫片辐射值与土壤表层有机质含量的相关分析

Correlation Analysis Between the Radiative Value and Soil Surface Organic Matter

本研究以内蒙古奈曼旗为研究对象,对奈曼幅卫星图象上的各种土壤景观类型进行了密度值的测定,经灰标等级转换为幅射值。土壤景观幅射值与土壤表层(0～10cm)有机质含量相关分析的结果表明:春秋季双时像七个波段中以秋季第四波段放果最佳(R=0.978,S=0.844),相关关系为 Y=ax^(-b)。需要特别指出的是,本研究发现,这种关系在土壤有机质含量低于1.5%时,仍然存在。

We test the density value of the soil landscape on the satellite image in the laboratry.The deusity value was changed into the radiative value thrnugh gray level.The correlation analysis result between the radiative value and the content of the soil surface organic matter shows:the ima- ge taken in Autumn is better than that taken in Spring,the fourth band in Autumn is the best among the seven bands in Spring and Autum imag- es(R=0.978,S=0.844).The form of regresiou equation is Y=ax^(-b).This relationship also exists when the content of soil surface organic matter is less than 1.5% in our researching range.