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准噶尔盆地人工林地土壤全盐的高光谱反演

, PP. 444-448

Keywords: 人工林地,高光谱遥感,土壤盐渍化,准噶尔盆地,新疆

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Abstract:

随着高光谱遥感技术的快速发展,通过其定量估测土壤化学成分具有很好的可行性。使用ASDProFieldSpec3便携式光谱仪,测量准噶尔盆地人工林地风干土壤样品的可见光-近红外光谱,利用土壤反射光谱值预测全盐的含量。首先,通过皮尔森相关系数分析方法,计算土壤全盐与土壤反射光谱之间的相关性,其中土壤光谱值的二阶导数与土壤全盐的相关系数最高为0.806,均方根误差最小为1.508。其次,在基于光谱反射率的基础上,通过多元统计回归分析,表明土壤光谱在1130nm、1430nm和1930nm波段的全盐反演模型预测的效果较好,可以利用这3个波段建立回归方程,对土壤全盐进行反演估算。

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