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棉花学报  2011 

基于高光谱植被指数的棉田冠层特征信息估算模型研究

DOI: 1002-7807(2011)05-0476-05, PP. 476-480

Keywords: 高光谱遥感,棉花冠层信息,归一化植被指数,比值植被指数,估算模型

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Abstract:

采用ASDFieldSpecProVNIR2500型光谱辐射仪获取了棉花不同生育时期的冠层高光谱反射率。并通过光谱分析技术,建立了基于高光谱植被指数——归一化植被指数和比值植被指数的棉田冠层特征信息的定量模型。经过对估算模型的精度检验和评价,最终筛选出表征棉花冠层结构特征参数的最佳估算模型。结果表明,基于归一化植被指数预测棉花叶面积指数,以幂函数(y=11.084x12.024,r=0.8076**)的模型为最优;基于比值植被指数预测棉花单位面积地上部鲜生物量,以指数函数(y=52.261·exp(0.1024x),r=0.8114**)的估计模型为最优;基于比值植被指数预测棉花单位面积地上部干生物量,以指数函数(y=9.5552·exp(0.1133x),r=0.8330**)的模型为最优。可见,利用高光谱遥感技术可以分析、模拟、评价、预测棉花冠层特征参量,为精准种植棉花提供了依据。

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