基于组件式GIS的施肥专家决策支持系统开发和应用

通过田间试验建立基于土壤肥力的红壤旱地和水田的平衡施肥模型，利用组件式地理信息系统技术(Component Geographic Information System，ComGIS)，在Visual Basic环境下嵌入MapObjects，结合数据库技术、专家系统技术，针对典型红壤丘陵区－江西余江县开发了县级尺度的施肥专家决策支持系统。在管理余江县基础地理、土壤、农业经济等信息的基础上，分析了江西余江县土壤养分的空间变异，通过离散化技术生成施肥单元，基于施肥单元进行了县域尺度水田和旱地作物的施肥指导。

Development and application of fertilization decision-making supporting systems based on ComGIS

The balanced fertilization models based on soil fertility were built by field experiment for paddy field and upland of red soil. The fertilization decision-making supporting systems was developed at Yujiang County, Jiangxi Province, by inserting MapObjects component into the Visual Basic development environment and combining the techniques of database ComGIS, decision supporting systems. According to the basic information of geography, soil and agricultural economy, the spatial variations of soil nutrient were analyzed. The fertilization decion-making supporting system supply fertilization instruction for the paddy soil and upland at the county scale based on the minimum unit of fertilization.