2007•Unpublished venueRequires access

Red-edge characteristics of winter wheat canopy spectra

Hu Chun

Abstract

Winter wheat canopy spectral reflectance was field measured using spectrometer Field Spec at different nitrogen levels and time periods.Some red-edge parameters including wavelength(λred),amplitude(dλred) and rededge apex area(∑dλ680～760)were analyzed for winter wheat leaf chlorophyll(CHL.T),leaf nitrogen content(N%),leaf area index(LAI),accumulated leaf nitrogen content(TN.D),etc.It is found that red-edge positions move to long wavebands till booting stage and then fall back to short bands after booting.A significant correlation is found between dλred and TN.D,CHL.T,and CHL.D.Similar relation exists between ∑dλ680～760 and N%.Red-edge parameters show strong correlation with LAI.It is thus concluded that some red-edge parameters form part of the best remote sensing descriptors.

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Key concepts: Red edge, Canopy, Winter wheat, Nitrogen, Leaf area index, Chlorophyll, Botany, Horticulture