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作物在水、肥、气、热、光等环境的综合影响下形成植冠。植冠一方面反映作物发育状况、抗逆性能和形成产量的能力,另一方面本身又具有独特的光谱属性。通过冬小麦光谱成分分析,可找出冬小麦某些重要农学参数与各种光谱指数之间的定量关系,从而实现冬小麦生长状况的动态遥感监测,进而作出产量预报。京津冀冬小麦农学参数的多光谱遥感监测研究已取得一些实质性结果。现以北京顺义县实验资料为例简要介绍于下。
Crops under the combined influence of water, fertilizer, gas, heat, light and other environment form crown. Planting crown on the one hand reflects the state of crop development, resistance to the ability to form and yield, on the other hand itself has a unique spectral properties. Through the spectral component analysis of winter wheat, the quantitative relationship between some important agronomic parameters of winter wheat and various spectral indices can be found, so as to realize the dynamic remote sensing monitoring of the growth of winter wheat, and then to forecast the yield. Multi-spectral remote sensing monitoring of agronomic parameters of winter wheat in Beijing, Tianjin and Hebei has made some substantive results. Shunyi County, Beijing is the experimental data as an example briefly below.