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核农学报  2015 

不同播期冬小麦地上干物质的光谱监测

DOI: 10.11869/j.issn.100-8551.2015.06.1158, PP. 1158-1164

Keywords: 冬小麦,播期,地上干物质,高光谱遥感,监测模型

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Abstract:

为了更好地利用遥感技术快速、准确监测冬小麦地上干物质,本试验对不同播期条件下京9428、超优66在开花期的地上干物质和冠层光谱反射率进行了测定,通过提取地上干物质的光谱敏感波段和植被指数,构建冬小麦地上干物质光谱监测模型。结果表明,地上干物质与原始光谱的一阶微分处理的相关性优于原始光谱,据此提取的特征波段和构建植被指数也均与地上干物质达到极显著水平,所构建的光谱监测的预测效果较好,其中以FDEVI(730,850)为变量建立的模型监测精度最高;播期组合的地上干物质与FDEVI(730,850)有很高的相关性,具有一定实践意义。此外研究发现,播期1(10月1日)条件下的模型决定系数达0.8685,经验证,RRMSE和RE也较小,故该播期适宜于冬小麦地上干物质监测。本研究可为冬小麦地上干物质无损动态监测及生产科学管理提供一定技术依据和实践参考。

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