土壤光谱特性及光谱反射率与苏打盐渍土含盐量的相关

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。

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

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.