| 孟卓强,胡春胜,程一松.光谱数据与冬小麦叶绿素密度的相关性研究[J].干旱地区农业研究,2007,(6):74~79 |
| 光谱数据与冬小麦叶绿素密度的相关性研究 |
| Study on correlation between chlorophyll density of winter wheat and hyperspectral data |
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| DOI：10.7606/j.issn.1000-7601.2007.06.16 |
| 中文关键词: 冬小麦 叶绿素密度 高光谱数据 相关分析 估算模型 |
| 英文关键词:winter wheat chlorophyll density hyperspectral data correlation analysis estimating model |
| 基金项目:中科院野外台站研究基金项目“基于Greenseeker技术的小麦—玉米氮素实时诊断和精准施肥研究”； 河北省科技推广项目“河北省典型地区精准农业技术试验示范” |
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| 中文摘要: |
| 分析2006年栾城试验站不同氮素水平下冬小麦的多时相的群体光谱测量数据和相应叶片叶绿素密度的测量数据,发现:冬小麦的群体光谱的导数光谱数据、红边光谱数据,归一化植被指数NDVI和比值植被指数RVI与叶绿素密度具有很好的相关关系,并且选取样本建立了相应的回归方程。以回归方程作为叶绿素高光谱估算模型,并利用检验样本对估算模型进行检验,结果表明,以745 nm处一阶导数光谱值、733 nm处二阶导数光谱值和红边振幅为变量的模型可以较好的估算叶绿素密度。 |
| 英文摘要: |
| By field experiments,we achieve the chlorophyll density and hyperspectral data of winter wheat at different nitrogenous levels and different periods, and investigate the relationship between chlorophyll density and derivative spectra of canopies,red edge parameters,NDVI,RVI by correlation analysis.It shows that the correlative relationship is good.Regression analysis was performed between these variables and chlorophyll density,estimation models about chlorophyll density has been built.Through the test of other samples,model has been build by using the first derivative spectra data at 745 nm,the second derivativespectra data at 733 nm,and amplitude of red edge are the better one of estimating chlorophyll density of winter wheat by hyperspectral remote sensing data. |
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