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本文介绍了土壤电磁波谱野外实例结果。分析了黑垆土、黄绵土、灰褐土及石灰性冲积土的反射光谱曲线及其特征:上述土壤的裸土在0.4—1.1μm波段内,从形态上可分为陡坎型和缓斜型。土壤含水量的增减,将改变光谱反射率值。同一种土壤的不同粗糙度,其光谱反射率不同。砾质河床淤沙土因持水能力低于沙质河床淤沙土,所以前者的光谱反射率高于后者。经波长与土壤光谱反射率的一元一次相关分析说明,在0.4～1.1μm波段内,土壤光谱反射率与波长的相关系数达0.90—0.99者占三分之一,并以缓斜型类土壤拟合程度最高,此结果为在遥感图象中提取土壤信息提供了可参考的数据。
This article introduces the field electromagnetic spectrum results of the field. The reflection spectral curves and characteristics of black loess, loess, gray cinnamon and calcareous alluvial soil are analyzed. The bare soil of the above soil can be divided into steep ridge type and gentle slope type in the range of 0.4-1.1μm. Changes in soil moisture will change the spectral reflectance values. The same soil with different roughness, the spectral reflectance of different. The gravelly channel silt sandy soil has a lower spectral reflectance than the sandy silt due to its lower water holding capacity. A one-dimensional correlation analysis of wavelength and soil spectral reflectance shows that the correlation coefficient of spectral reflectance and wavelength of soil is 0.90-0.99 in the range of 0.4-1.1μm, accounting for one-third of the wavelength. This result provides the reference data for extracting soil information in remote sensing images.