针对当前国内农户分散经营模式下存在肥料偏施、施肥方式不科学等问题,基于地理信息系统( GIS)设计实现了一种适用于分散农户的变量施肥配方系统.系统采用关系型数据库SQL Server 2008作为内置数据库,实现土壤变异信息、作物历年产量信息、施肥配方信息等多种相关信息的存储、更新与查询.系统实现了空间插值、栅矢转换、数据融合以及叠加分析等功能,可以对土壤属性信息进行统计分析.同时,结合产量模型、施肥模型等知识模型自动生成分散农户具体条田施肥配方,施肥配方信息可通过指令传递给SMC6480控制器进行肥料的自动配比.通过实例应用,系统稳定可靠,能够很好地实现各功能模块.%Farmers manage the cropland in a decentralized manner at present in China, and usually fertilization could not be applied rationally and scientifically. This paper presented a variable fertilization system for dispersive farmer, which was designed on the basis of Geographic Information System (GIS). The system referred a relational database SQL Server 2008 as a built-in database, in order to store, inquire and update kinds of information, such as the variability of soil, the crop yields over the years, and the fertilization formulas. The statistical analysis of the soil attribute can be realized by spatial interpolation, the conversion from raster to vector, data fusion, and overlay analysis in the system. And a fertilization formula for a cropland can be generated automatically by invoking the yield model and the fertilization model. Furthermore, the fertilization formula can be delivered to SMC6480 to match the fertilizer scientifically. The experimental results indicate that the system is stable and reliable, and all the modules ran well.
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