夏玉米倒伏模拟试验及遥感监测

Simulation test and remote sensing monitoring of summer corn lodging

针对传统的玉米倒伏人工灾害评估方法效率低、随机性大等缺点,该文提出了一种基于遥感技术的方法,设计了田间模拟试验。利用ASD光谱仪采集倒伏玉米的冠层光谱数据,并与未倒伏玉米的光谱数据进行比较。结果显示了倒伏玉米和未倒伏玉米冠层光谱之间存在一定程度的差异。利用夏玉米NDVI值的改变,采用两期遥感影像对山东淄博市桓台县夏玉米倒伏情况进行了监测。结果表明,基于遥感数据的NDVI方法在一定程度上可以有效监测玉米倒伏。

In light of the traditional corn lodging assessment method with low efficiency,large randomness,a method based on remote sensing was proposed,and field experiments on corn lodging were conducted in summer.The spectral data of lodging corns was measured using ASD spectrometer,and was compared with the spectral of non-lodging corns.The results showed that there are certain differences in the canopy spectrum between lodging and non-lodging corns.Canopy NDVI can demonstrate the differences in spectral features.And corn lodging in Huantai County in Shandong was monitored successfully through two different periods satellite images using NDVI.The result also suggested that NDVI based on remote sensing data is effective to monitor corn logding in a certain degree.