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- W854303972 abstract "Through vegetation index formed by combinations of all kinds of bands spectral reflectance,the correlation between canopy spectral vegetation index and aboveground biomass of two rape varieties by applying two N levels were analyzed in a field experiment from 2007 to 2008,and the estimating model of spectral vegetation index to aboveground biomass of rape was constructed. The results showed that in the whole growth stage,the fresh weight and dry weight of leaf and stem,and fresh weight of pod of rape increased at first,and then deceased with the prolongation of development phase,while the dry weight of pod increased straightly. There was a positive correlation between spectral vegetation indexes and fresh weight and dry weight of leaf,and the other vegetation indexes passed the test of significant difference except RVI. The fitting equation of spectral vegetation indexes to fresh weight and dry weight of leaf by exponentiation and exponential forms were the best,and the R2 of GBNDVI variance regression for fresh weight and dry weight of leaf reached 0.6571 and 0.6497,respectively. There was a significantly positive correlation between spectral vegetation indexes and fresh weight and dry weight of stem,and the best fitting equation of spectral vegetation indexes to fresh weight and dry weight of stem were exponentiation and exponential forms,and the exponentiation form of BNDVI for fresh weight and dry weight of stem was the best,the R2 value was 0.9134 and 0.9217,respectively. The correlations between spectral vegetation indexes and fresh weight and dry weight of pod were negative,and the correlation between NDVI and fresh weight of pods reached extremely significant level,while all spectral vegetation indexes and dry weight of pod did not pass the difference test at 1% level. The R2 of logarithm regression for NDVI and fresh weight of pod reached 0.5487. These results would provide basis for remote sensing of growth,yield and quality of grape in a large scale." @default.
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- W854303972 date "2009-01-01" @default.
- W854303972 modified "2023-09-23" @default.
- W854303972 title "Correlation analysis between aboveground biomass of rape and canopy spectral vegetation index." @default.
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