【摘要】 通过对开封市郊冬小麦整个生育阶段反射光谱的测量,分析了不同生育阶段、播种垄向及土壤背景对冠层光谱反射的影响。结果表明:不同生育阶段的冬小麦反射光谱特性总体趋势符合植被的反射光谱特性,但是又有一些差异;不同垄向冬小麦的反射光谱也不一样,南北垄向的光谱反射率高于东西垄向光谱的反射率;不同土壤背景的冬小麦反射光谱也存在差异。更多还原

【Abstract】 The canopy reflectance spectrum of winter wheat at all growth periods in Kaifeng suburb were measured with a handheld spectroradiometers onsite. The spectral features of wheat at different growth periods were anal-yzed. In addition,the influences of planting orientation and soil background were also examined. The results show that the general trend of the winter wheat’s spectrum curve is same as that of common green vegetations. At the same time,the wheat has different reflectance spectrum at different growth periods. Furthermore,the reflectance spectrum of winter wheat varies with the different kinds of soil and planting orientation. The reflec-tance spectrum ratio of north-south orientation is higher than that of west-east orientation.更多还原