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为了利用遥感监测小麦条锈病,研究条锈病侵染后小麦单叶光谱和叶绿素含量变化,人工接种条锈病菌在小麦幼苗上,测得接种1～24d的光谱和叶绿素含量,将其叶绿素含量与光谱及其一阶微分做相关性分析,利用光谱微分参数进行方程的模拟。接种1～12d,感染条锈病的叶片叶绿素含量与原始光谱及其一阶微分光谱在可见光波段呈负相关关系,接种13～24d,两者在可见光波段呈正相关的关系。接种后1～12d的方程模拟中以SDb为变量的模型为最佳模型,接种13～24d的方程模拟中以SDr/SDg为变量的模型为最佳模型,说明可利用光谱参数进行条锈病侵染小麦的早期监测。
In order to monitor the stripe rust of wheat by remote sensing, the change of single leaf spectra and chlorophyll content of stripe rust in wheat was studied. The spectrum and chlorophyll content of wheat stripe rust inoculated on wheat seedling for 1 ~ 24 d were measured, Spectrum and its first-order differential correlation analysis, the use of spectral differential parameters of the equation simulation. From 1 to 12 days after inoculation, there was a negative correlation between the chlorophyll content and the original spectra and the first order differential spectrum in the visible light band. The inoculation of 13 ~ 24 days showed a positive correlation between the chlorophyll content and the original spectrum. SDb was the best model in the equation simulation of 1 ~ 12 days after inoculation, and SDr / SDg was the best model in 13 ~ 24 days after inoculation, which indicated that the stripe rust could be used by spectral parameters Early detection of infected wheat.