]*>","")" /> Relationships between Leaf Nitrogen Content and Canopy Reflected Spectral in Cotton

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Relationships between Leaf Nitrogen Content and Canopy Reflected Spectral in Cotton

HOU Xin-jie;JIANG Gui-ying;BAI Li;LIU Shu-juan;LI Feng   

  • Received:2008-05-25 Revised:2008-05-25 Online:2008-05-25 Published:2008-05-25

棉花冠层反射光谱与叶片氮含量定量关系研究

侯新杰;蒋桂英;白丽;刘淑娟;李凤   

  1. 石河子大学农学院,新疆石河子,832003;石河子大学生命科学学院,新疆石河子,832003

摘要: 对可见光波段至短波红外波段(350~2 500 nm)棉花田间冠层光谱反射率与叶片含氮量间的关系进行了相关分析.结果表明,350~732、733~940和1 970~2 477 nm波段的光谱反射率与叶片含氮量极显著相关;940~1 176 nm波段的光谱反射率与叶片含氮量显著相关,以上波段为叶片全氮敏感波段.通过分析叶片含氮量与高光谱特征参数关系,得出吸收谷特征参数Depth1154和PRI(570,530 nm)可以用来预测盛花期叶片含氮量,其中Depth1154的复相关系数最高达到0.747 3,为运用遥感技术大面积、迅速、无破坏地来预测棉花生长状况以提供可能.