| Estimation of chlorophyll content in rice at different growth stages based on hyperspectral in yellow river irrigation zone |
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| DOI：10.7606/j.issn.1000-7601.2018.02.06 |
| Key Words: irrigation districts of the Huanghe River basin hyperspectrum rice chlorophyll content estimation |
| Author Name | Affiliation | | YAN Lin | College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China | | CHANG Qing-rui | College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China | | LIU Meng-yun | College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China | | WANG Shuo | College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China |
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| Abstract: |
| Plant chlorophyll is the material basis of plant photosynthesis. In order to investigate the response of rice canopy spectrum and chlorophyll content in different growth stages, the canopy spectral reflectance and chlorophyll content of canopy were measured using the rice plot in Ningxia Irrigation Zone of China. The relationship between canopy spectral reflectance and chlorophyll content was analyzed. The correlation between canopy spectral reflectance and chlorophyll content decreased with the growth period, and the correlation between the canopy spectral reflectance and the canopy reflectance of the canopy was significantly decreased in different growth stages. Based on the normalized vegetation index (NDSI) where steam elongation (NDSI（456,475)，R2=0.6502), heading (NDSI（748,782），R2=0.5264), milk grain (NDSI（822,823），R2=0.5708), dough grain (NDSI（730,731），R2=0.4396) could be used to predict the chlorophyll content of rice canopy. |
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