航天遥感技术在冬小麦估产中的应用

The Remote Sensing Technology and Its Application in Estimation of Winter Wheat Yield

中国是个人口众多而可耕地少的发展中国家,农业收成的丰欠对中国经济的发展具有战略上的重要性,应用遥感技术对作物产量进行实时监测是管理决策科学化的重要步骤。作者利用在可控样地上种植冬小麦所获得的同步光谱信息与必要的农学数据,分析遥感参数及非遥感参数与冬小麦产量三要素间的相互关系,通过计算机信息系统使之有机地结合起来,是冬小麦遥感估产的正确途径。作者提出的混合像元分解理论,使应用AVHRR资料实现冬小麦宏观监测成为可能。

China is a developing coun-try with large population and lim-ited arable land. It is strategically important to a bumper harvest for Chinese economic development. It is a necessary step for scientific and democratic administrative management to apply remote sensing technology for realizing timely monitoring of crop yield. In fact, the yield of winter wheat is determined by three factors (ear number, grain number and grain weight) , they are formed in dif-ferent stage and are controllled by different main factors, so the method of estimation of winter wheat yield should be based on the relationship between spectral parameters and the three basic factors which form the winter wheat yield. Authors utilizes the synchronized spectral parameters and necessary agronomic data gained from controlable sample fields to analyze the relationship between three basic factors and remote sensing data adding non-remote sensing parameters. The theory of decomposition of mixed pixel has made it possible to realize macro monitoring of winter wheat using low resolution AVHRR data.