【摘要】 <正> 土壤是地球表面最广泛出露的地物之一。土壤的光谱反射特征除了取决于它本身的物理化学性质、有机质含量及颗粒大小之外,湿度是影响土壤光谱反射率的一个活跃的重要因素。由于土壤中水份含量的多寡对热量平衡、土壤温度、农业墒情均有重要意义,所以,用可见、近红外、热红外以及微波等遥感手段探测土壤含水量的研究日益广泛深入。更多还原

【Abstract】 An investigation was made on the relationship between the spectral reflectivity of different field soil humidities on yellow brown earth and the spectral reflectivity of ovendried soil samples using the data in the waveband of 410—1000 nm. Experimental results showed that this relationship followed the first order regression equation. Meanwhile, the relationship between soil spectral reflectivities at four wavelengths and soil humidities was also studied, and it was showed that the relationship followed the second order regression equation. On the basis of the experiments their varying characteristics and the significance of its application in remote sensing are briefly discussed.更多还原