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同时利用GoogleMap和WebGIS强大的地图服务功能,构建了一个实用化的区域桃园施肥决策系统。系统采用分布式 B/S结构,在专题空间数据库和模型数据库支撑下,实现了数据维护更新,GoogleMap和GIS信息浏览查询,肥力评价 与推荐施肥决策4个主要功能。系统所运用的施肥决策模型在北京市平谷区桃园进行了4a的试验验证,结果表明:与...