小麦条锈病高光谱近地与高空遥感监测比较研究

 小麦条锈病是我国小麦生产中的重要病害,对该病防治的关键是做好监测工作。本研究利用ASD手持野外光谱仪ASD FieldSpec HandHeld FR(325~1 075 nm)]和热气球在近地与高空研究了发病小麦冠层的高光谱遥感数据特征,获得了近地和对应高空2个不同平台光谱数据。经比较分析,发现高空数据与近地数据之间存在明显而有规律的变异关系,即高空获得的光谱反射率在可见光谱区域明显大于近地获得的光谱反射率。进一步对差异最显著的绿峰580 nm和黄边610 nm处数据进行回归分析,获得了高空光谱反射率值与近地光谱反射率值之间的回归模型,为进一步研究利用高平台遥感监测小麦条锈病奠定了一定的理论基础。

Comparison research of hyperspectral properties between near-ground and high altitude of wheat stripe rust

Wheat stripe rust(Puccinia striiformis West.f.sp.tritici Eriks et Henn.) can cause the yield loss of wheat in a large scale in China.It is reported that the key to control is monitoring this disease.A handheld sensor ASD FieldSpec HandHeld FR(325-1 075 nm)made by ASD Company,1990] was used to measure the canopy reflectance of the disease in field via a fire-balloon flight.And the spectral data from near-ground correspondingly was also obtained.As a result,the difference between data obtained from nearground and fire-balloon were found to be regular and distinctive.The reflectance data from fire-balloon were distinctively higher than that from near-ground.Statistic analysis of the reflectance at green band(580 nm) and yellow band(610 nm) was made.Then the regression model between reflectances obtained from near-ground reflectance and fire-balloon at the two of the most distinctive wavelength band.This model,to some extent,could be important to the research of monitoring of wheat stripe rust via higher platform.