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• W2068428480 abstract "This experiment investigated the relationship among the reflectance spectral vegetation indices, sulphur dioxide SO2 concentration and chlorophyll concentration Ch of rice canopy under different levels of atmospheric SO2. A split plot field experiment comprising seedlings of three genotypes of rice was exposed to SO2 at different concentrations. Visible and near infrared canopy reflectance were measured for each SO2 treatment 30 days and 46 days after transplanting, respectively. SO2 concentration had a strong negative relationship with Ch-a chlorophyll-a concentration, Ch-b chlorophyll-b concentration and Ch-t total chlorophyll concentration correlation coefficients R from −0.454 to −0.618 at the 0.01 confidence level. Green and red reflectance varied with SO2 concentrations. Average reflectance were used to calculate difference vegetation index DVI, normal difference vegetation index NDVI and ratio vegetation index RVI. MERIS Terrestrial Chlorophyll Index MTCI was used in this investigation also. One-sample tests showed that for this spectral laboratory there was significant difference at the 0.01 level at those vegetation index DVI, RVI, NDVI and MTCI. DVI ρred–ρgreen, ρnir–ρred and ρnir–ρgreen, NDVI ρnir–ρred/ρnir+ρred, RVI ρnir/ρred and MTCI were significantly correlated with Ch-b, and Ch-t at the 0.05 confidence level or above. Although MTCI was significantly correlated with Ch-b and Ch-t, it was not strongly correlated with SO2 concentration. DVI, NDVI ρnir–ρred/ρnir+ρred and RVI ρnir/ρred were proved effective methods to estimate the injury of rice by SO2 air pollutant." @default.
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• W2068428480 date "2010-08-20" @default.
• W2068428480 modified "2023-09-27" @default.
• W2068428480 title "The effects of sulphur dioxide on the spectral curves and chlorophyll concentration of rice canopy" @default.
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• W2068428480 doi "https://doi.org/10.1080/01431160903232816" @default.
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