基于光谱角指数小麦冠层叶片特征差异估测研究  

Estimation of Wheat Leaf Area Index and Chlorophyll Difference by Hyperspectral Angle Data

作　　者：肖春华[1] 吕银亮[1] 刁万英[1] 李少昆[2] 王克如[2] 陈兵[3] 王琼[3] 

机构地区：[1]石河子大学农学院绿洲生态农业重点实验室,新疆石河子832003 [2]中国农业科学院作物研究所农业部作物生理生态重点实验室,北京100081 [3]新疆农垦科学院棉花研究所,新疆石河子832000

出　　处：《新疆农业科学》2015年第4期595-600,共6页Xinjiang Agricultural Sciences

基　　金：国家科技支撑计划(2012BAH27B04);国家自然科学基金项目(31071371;31460326)

摘　　要：【目的】为利用高光谱技术实现作物氮素营养状况无损快速监测提供途径。【方法】通过不同品种小麦不同氮素水平试验,分析小麦不同氮素营养状况下,叶片叶绿素含量与叶面积指数、冠层光谱角的关系,定量分析光谱角指数,并建立相关模型对小麦氮素营养状况进行实时监测。【结果】冠层光谱角指数与差值叶绿素含量和差值叶面积指数的相关性最高为0.919 7,两者之间建立的模型决定系数为0.739 2,0.617 8,具有很好的拟合效果。【结论】利用光谱角可以监测小麦叶片叶绿素及叶面积差异,在此基础上进行小麦氮素营养监测是可行的。【Objective】The project aims to use hyperspectral imaging technology to monitor the nitrogen nutritional status in crops rapidly and accurately.【Method】Through the different nitrogen levels of wheat experiments,the correlation between chlorophyll content of leaves under different nitrogen nutritional status and leaf area index and the canopy spectral angle was measured,thus establishing hyperspectral angle model to monitor the nutritious status.【Result】The result showed that the relativity between wheat canopy HSA and agriculture parameter was as high as 0. 919 7and the determination coefficients of the model were 0. 739 2 and0. 617 8,which displayed that it had desirable fitting effect.【Conclusion】The HSA model was feasible for monitoring and estimating wheat chlorophyll nutrition and leaf area index.

关 键 词：小麦 冠层光谱角 叶面积指数 叶绿素浓度 模型 

分 类 号：S512.1[农业科学—作物学]