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土壤钾含量高光谱定量反演研究

DOI: 10.6046/gtzyyg.2012.04.26, PP. 157-162

Keywords: 土壤,高光谱遥感,

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Abstract:

为了更快捷准确地进行土壤钾(K)含量的预测,基于土壤高光谱数据和化学元素分析数据,研究土壤光谱与土壤钾含量之间的定量关系。在对土壤原始光谱进行处理分析基础上,提取反射率(R)、反射率倒数的对数(log(1/R))、反射率一阶微分(R')和波段深度(BD)4种光谱指标,运用偏最小二乘回归方法建立相应的预测模型,并对模型进行检验。结果表明,波段深度是估算土壤钾含量最好的光谱指标,其建模精度超过0.85,均方根误差不超过0.1;全波段高光谱分辨率反射光谱具有快速有效估算土壤钾含量的潜力。

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