基于WebGIS和知识模型的精确农作决策支持系统

WebGIS and knowledge model-based decision support system for precision farming

在提炼和优化作物管理知识模型的基础上,以WebGIS为空间信息平台,运用软构件技术及B/S分布式网络结构,构建了网络化精确农作决策支持系统。系统实现了基本地图操作、信息查询、差异分析、决策支持、结果展示以及系统维护功能,其中决策支持功能可基于田区土壤肥力和苗情长势差异进行数字化管理方案生成和因苗动态调控。在水稻试验示范区的系统应用结果表明,根据系统推荐的方案进行水稻田间管理,可使该区整体产量水平提高12.16%,肥料施用量减少23.55%,产量变异度下降79.49%。研究结果为实现网络化、数字化、广适性的精确农作决策支持提供了基本平台。

On the basis of extracting and optimizing the knowledge model for crop management, with WebGIS as spatial information platform, a Web-based decision support system for precision farming was developed, by using the technology of software component and Browser/Server network mode. The system realized the functions as normal map handling, information query, difference analysis, result display, system maintenance and decision support. The digital management prescription was generated on the basis of the differences in soil fertility among the fields and further adjusted according to the growth status monitored at specific growth stages. Case studied on the system with the rice field experiments in Nanjing indicated that under the management plan recommended by the system, the average rice yield in the experiment area was increased by 12. 16%, the amount of nitrogen fertilization decreased by 23.55% , and grain yield variation decreased by 79.49% , as comparing to the regular management plan. The present work has provided a basic platform for realizing Web-based, digital and dynamic decision support in precision farming.