利用冠层反射光谱监测叶片碳氮比的适宜时期为孕穗期至吐丝期。
The proper time for monitoring leaf soluble sugar to nitrogen ratio should be from booting to silking stage.
本文通过对4个感染不同等级稻叶瘟的水稻冠层反射光谱进行测试，并对光谱反射曲线进行微分分析，研究了绿光区、红光区和近红外区反射光谱的变异特征。
Rice spectrum features at green, red and near infrared regions were studied by measuring and analysing rice canopy reflectance and differential spectrums with 4 levels of rice leaf blast.
本文通过对4个感染不同等级稻叶瘟的水稻冠层反射光谱进行测试，并对光谱反射曲线进行微分分析，研究了绿光区、红光区和近红外区反射光谱的变异特征。
Rice spectrum features at green, red and near infrared regions were studied by measuring and analysing rice canopy reflectance and differential spectrums with 4 levels of rice leaf blast.
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