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基于TM影像的荒漠-绿洲交错带土壤有机质含量反演模型/Inversion Models of Soil Organic Matter in Oasis-Desert Ecotone Based on TM Image Reflectance[J]
Authors
Luan Fuming
Wang Fang
+12 more
Xiong Heigang
Zhang Fang
Zhang Xiaolei
中国科学院大学,北京100049
中国科学院新疆生态与地理研究所,新疆乌鲁木齐830011
北京联合大学应用文理学院,北京100083
张小雷
张芳
新疆大学资源与环境科学学院,新疆乌鲁木齐830046
栾福明
熊黑钢
王芳
Publication date
1 January 2014
Publisher
Abstract
选取Landsat TM影像的光谱反射率(R)、反射率之倒数(1/R)、反射率倒数之对数(lg(1/R))、反射率一阶导数(FDR)、波段深度(D)等5种光谱指标,分别建立了奇台县土壤有机质(SOM)含量的反演模型,并利用F检验来验证模型的显著性.结果表明:用各光谱指标建立的土壤各层和不同深度SOM含量的反演模型精度值由低到高的顺序均为lg(1/R)<R<1/R<FDR<D,以D反演SOM含量的模型效果最好,且对10~20 cm的SOM含量的反演精度最高,适用于对研究区SOM含量的反演,FDR的反演效果次之,1/R和R的模型精度一般,而lg(1/R)的模型精度最差;各层拟合模型的反演精准度由低到高的顺序为50~60 cm<40~50 cm<30~40 cm<20~30 cm<0~10cm<10~20 cm,不同深度反演模型的优劣为0~60 cm<0~50 cm<0~40 cm<0~30 cm<0~10 cm<0~20 cm
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Last time updated on 29/11/2016