| A study on winter wheat spectral characteristic under different nutrition conditions in Guanzhong area |
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| DOI：10.7606/j.issn.1000-7601.2006.03.10 |
| Key Words: Spectrum reflectivity Chlorophyll content nutrition status growth stage |
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| Abstract: |
| Based on field test and laboratory experiment,this article analyzed the correlation between the spectrum reflectivity and chlorophyll content of wheat leaf under different N and P levels in guanzhong area.The result indicates that: ① N fertilizer increase the chlorophyll content and P fertilizer does not.② in the visible light band,the more the N fertilizer,the less the light reflectivity of the leaves,in the infrared wave band,then the effect of N fertilzer is reversed.The effect of phosphate fertilizer is not obvious.③ under N fertilizer use condition,the visible light reflectivity of wheat leaves decreases with wheat growth;under P fertilizer use condition,the visible light reflectivity reduces at early growth stage and then increases.④ under N fertilizer use condition,the chlorophyll content and the light reflectivity are significantly correlated,and under the P fertilizer use condition,their correlation is not significant. |
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