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通过人工接种诱发小麦条锈病,在病害大面积发生后,利用ASD手持式野外光谱仪(325～1 075 nm)测定小麦条锈病近地冠层高光谱数据,并获取该试验田同一时相SPOT-2卫星遥感数据,进而对卫星及近地小麦条锈病光谱反射率进行比较分析。结果显示,两者在SPOT-2卫星的3个波段上表现一致;1、2波段发病区的冠层光谱反射率分别为19.02%和15.40%,比对照区的18.61%和14.90%高,而在3波段中,发病区和对照区的反射率分别为34.65%和35.90%。由此可见,3波段发病区与对照区的光谱反射率差异更大,可用3波段进行小麦条锈病卫星遥感监测。
The wheat stripe rust was induced by artificial inoculation. After hyperspectral disease occurred, the canopy hyperspectral data of wheat stripe rust was determined by ASD portable field spectrometer (325 ~ 1075 nm), and the same phase SPOT-2 Satellite remote sensing data, and then satellite and near-field wheat stripe rust spectral reflectance comparative analysis. The results showed that the spectral reflectance of the two SPOT-2 satellites was the same over the three bands. The spectral reflectance of the two bands was 19.02% and 15.40%, respectively, which were higher than 18.61% and 14.90% of the control In the 3 wave band, the reflectivity of the incidence and control areas were 34.65% and 35.90% respectively. Thus, the difference of spectral reflectance between the 3-band disease area and the control area is greater, and 3-band satellite remote sensing monitoring of wheat stripe rust can be used.