Study on model for remote sensing estimation of maize yield |
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Authors: | Liu Zhaoli Huang Tieqing Wan Enpu and Zhang Yangzhen |
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Institution: | (1) Changchun Institute of Geography, the Chinese Academy of Science, 130021 Changchun, P. R. China |
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Abstract: | Through analysis of perpendicular vegetation index (PVI) from combination of visible and near-infrared spectrums reflecting
the feature of crop reflectance, we come to the conclusion that the index can better indicate crop instantaneous photosynthesis
whereas people generally regard it as the representation of crop leaf area index (LAI). Exploration of crop photosynthesis
within a day and its period of duration leads to production of photosynthetic vegetation index (PST) that can reflect the
whole crop accumulated photosynthesis, which means the total biomass produced by crop, moreover the method simulating PST
is put forward by employment of multi-temporal spectrum parameters. On the basis of the achievements mentioned above, a new
comprehensive model for remote sensing estimation of maize yield is established, which can comprehensively show major physiological
actions of maize and the course of its yield formation, organically integrate various effective ways of crop yield estimation.
It lays a solid foundation for carrying out remote sensing estimation of maize yield on a large scale. |
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Keywords: | perpendicular vegetation index photosynthetic vegetation index comprehensive estimation yield model remote sensing estimation of maize yield |
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