Estimation of LAI and Aboveground Dry Biomass in Maize Based on Canopy Spectral Reflectance

doi:10.7668/hbnxb.2008.01.049

Abstract

Abstract: The reflectance and LAI of maize canopy and the aboveground dry matter were measured using Zhengdan958 and Xundan 20 as experiment material. The regression analysis was carrired out to determine the relations of LAI andaboveground dry biomass with RVI and NDVI composed of different wavelengths. The result indicated that the correlationof LAI with NDVI was higher than with RVI,while the power function regression(R₉₅₀,R₆₅₀)of NDVI with LAI was thebest. However,RVI had significantly binomial correlation with aboveground dry biomass,with a estimating model Y=-0.722 4(R₈₀₀/R₆₅₀)²+1.631 6(R₈₀₀/R₆₅₀)+271.49,R²=0.793 5.

Key words: Maize, Canopy reflectance spectrum, Vegetation index, LAI, Aboveground dry biomass

CLC Number:

S513.01

ZHAO Qiao-li, ZHENG Guo-qing, DUAN Shao-fen, DAI Ting-bo. Estimation of LAI and Aboveground Dry Biomass in Maize Based on Canopy Spectral Reflectance[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2008, 23(1): 219-222. doi: 10.7668/hbnxb.2008.01.049.

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