以双城市农田耕层0--0 cm采样数据和土壤图、区划图、土地利用图为基础,通过地统计学和空间叠加分析方法,生成了施肥管理图。并以长期田间试验和施肥模型为依据,建立了推荐施肥指导数据库和专家系统。在ArcGIS Server平台上,利用JAVA Script编程语言开发了双城市施肥决策支持系统。该系统可以在全市范围内按照不同的地力和养分等级进行施肥指导。系统操作简便,可视化程度高,可以帮助农户获得合理的施肥建议,可为决策者对区域土壤养分动态变化的监测和管理提供数据支持,为促进农村信息化建设、提高土壤肥力质量和作物产量,保护生态环境提供了基于GIS的信息化管理平台。
A Fertilizer Decision Support System was developed based on the long term maize field experiments in Shuangcheng County located in black soil region, Northeast China. In the study, 500 soil samples in the0-20cm layer were collected from the cor nfield in all the Shuangcheng County and the support scheme of the system was established by the long-term experiment in the field and fertilization model. The geostatistics and Kriging methods were used in the study in order to analyze the spatial heterogeneity of soil nutrients and make the map of fertilization management unit. The Java Script Language was used to develop the Fertilizer Decision Support System on ArcGIS Servers. Using this system, agronomists and decision makers can obtain information on the spatial variability of soil fertility and make decision on strategic management on soil fertil-ity. In addition, far mers can access the system to obtain their fertilizer recommendations easily. This research provides a useful tool to promote the application of agricultural information through WebGIS, to increase farmer's profit, and to improve sustainable agriculture and environment protection.