土壤光谱特性及光谱反射率与苏打盐渍土含盐量的相关

THE CHARACTERISTICS OF SOIL SPECTRA AND THE CORRELATION OF THE SPECTRAL REFLECTANCE WITH THE SALT CONTENT OF SODA SALT—AFFECTED—SOILS

摘要:

统计分析认为, 可利用光谱反射率区分盐碱土、风沙土、淡黑钙土和黑土, 为其在TM单波段影象上的解译提供了理论依据。在干扰因素差异甚微的情况下, 经过对苏打盐渍土壤光谱反射率进行统计分析认为, 光谱反射率与苏打盐渍土表层0~5厘米含盐量极显著相关, 可建立二者之间相关的回归方程。通过对回归方程的实用性进行检验认为, 基本可利用光谱反射率由回归方程推算苏打盐渍土表层含盐量。为苏打盐渍土速查提供了新途径。

Abstract:

Statistical analysis suggests that the spectral reflectance can be used to distinguish alkali-saline soil、sandy soil、grey-chernozemic soil、black soil, Which provides the theoretical basis for their interpretation on the TM image of single band. Through analysing the spectral reflectance of soda saltaffected-soils under the condition of the difference from the interference factors being very small, it is shown that the spectral reflectane is remarkably interrelated with the salt content in the 0～5cm soil at the top layer of soda salf-affected-soiis. The regression equations were established through the analysis of interrelationship the equations,the spectral reflectance can be used to calculate the salt content of soda salt-affected-soils in its top layer, providing a rapid way for the investigation of soda salt-affected soils.