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土壤是一个时空连续的变异体,传统土壤参数测定与监测方法难以揭示土壤的时空间异质性规律;土壤光学遥感可以实现土壤主要参数的快速、宏观测定。本文综合评述了土壤不同理化参数(有机质、土壤水分、矿物组成、土壤质地、土壤结皮)在光学波段的光谱特征与遥感反演,光学遥感在土壤分类与制图方面的应用;分析了土壤线的各种影响因素(外部因素及相关土壤理化参数),以及土壤线对植被指数定量监测植被状况的重要性;归纳了土壤光学遥感存在问题与发展趋势。
Soil is a continuous and spatiotemporal variation. It is difficult to reveal the laws of temporal and spatial heterogeneity of soil by traditional methods of soil parameter determination and monitoring. Soil optical remote sensing can be used to determine the main parameters of soil quickly and macroscopically. In this paper, the spectral characteristics and remote sensing inversion of different physical and chemical parameters of soil (organic matter, soil moisture, mineral composition, soil texture, soil crust) were summarized. The application of optical remote sensing in soil classification and mapping was analyzed. (External factors and related physical and chemical parameters of soil), and the importance of soil line to monitor vegetation status quantitatively by vegetation index. The existing problems and development trend of soil optical remote sensing are summarized.