农田农情参数遥感监测进展及应用展望

农情参数是指反映作物生长过程及其产出的状态指标,关键农情参数主要包括作物长势、单产、物候和旱情等,可用于指导农田的生产管理。遥感是关键农情参数获取的有效手段,然而目前农情参数的遥感监测大多停留在大尺度、宏观监测的层面上,由于缺乏高时空分辨率、高准确度、低成本的农田信息获取技术,业务化的农田尺度农情参数获取受到了诸多因素的制约与限制。导致难以为农田生产管理提供及时的信息支持,这已经影响到精准耕作的发展与应用。文章在总结目前长势、单产、物候和旱情等几个主要农情参数遥感监测研究进展的基础上,分析了这些技术在农田尺度应用的瓶颈,并从新数据源和农情参数监测新模型两个角度出发,对农田尺度农情参数的获取进行了展望。

Research Advances and Outlook of Crop Monitoring with Remote Sensing at Field Level

Crop-info is a collection of indicators that reflect the crop growing process and its output.The key crop info includes crop condition,crop yield and crop phenophase and drought,which can be used to guide the field management.Remote sensing is an effective tool for crop info acquirement,yet most of crop info acquiring focus on the large-scale macro monitoring.Due to the lack of high-resolution,high-accuracy and low-expense information acquiring technology at field level,the operational crop info monitoring at field level was greatly restricted.This set great block in guiding field management with instant information support,which also stand on the way of application and development of precision agriculture.After summarizing the research advances in crop condition,crop yield,crop phenophase and drought monitoring with remote sensing,the paper analyzes the bottle neck in the application of current crop info monitoring models with remote sensing at field level.Two aspects for applying the crop info monitoring with remote sensing at field level to support precision agriculture were suggested,which are renovation of data source and construction of new crop info monitoring models.