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植被覆盖区土壤化学性质监测一直是一个难点,往往只能通过生物地球化学的方法,利用上覆植被信息间接地反映。该研究通过野外采样分析的17个翅碱蓬(Suaeda salsa)光谱数据和其下土壤样品的理化分析配对数据,探讨土壤化学性质与翅碱蓬高光谱植被指数间的关系。结果表明:上覆翅碱蓬高光谱植被指数与土壤有机质、全氮、速效钾之间均无显著相关,高光谱植被指数(NDNI)可用于初步反映土壤全磷的含量变化,NDVI705可用于初步反映土壤pH值的变化,而高光谱植被指数(MSI)可以很好地反映土壤盐分含量的变化。在此基础上,建立了土壤全盐量与19个高光谱植被指数的偏最小二乘回归模型,这为翅碱蓬覆盖区域土壤盐渍化监测提供了一种方法。 更多还原

【Abstract】 It is difficult to monitor soil salinization at the regions covered by vegetation.In general,the above covered vegetation information was used to indirectly monitor the soil chemical properties on the basis of bio-geochemical method.In this paper,Suaeda salsa spectra and soil property data were gotten through measurement of seventeen paired-samples,which were used to study hyperspectral vegetation indices of Suaeda salsa in response to changes of soil chemical properties.The results showed that ...