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中国农学通报 ›› 2007, Vol. 23 ›› Issue (6): 401-401.

• 资源 环境 生态 土壤 气象 • 上一篇    下一篇

养分平衡法配方施肥数据库建模

蔡德利,翟瑞常,侯雪坤   

  • 出版日期:2007-06-05 发布日期:2007-06-05

Data Modeling for Prescription Fertilization of Nutrient Balance and Fertilizer Recommendation

CaiDeli, ZhaiRuichang, HouXuekun   

  • Online:2007-06-05 Published:2007-06-05

摘要: 【研究目的】养分平衡法是一种重要的配方施肥方法,在进行施肥决策时,需要依赖大量的施肥参数进行计算,所以建立数据库对施肥参数进行有效地管理是一项非常重要的工作。【结果】笔者给出了养分平衡法简洁的计算公式,采用实体-关系建模的方法确定了8个实体对象和12个关系对象,并绘制了完整的实体-关系图。【结论】本文的分析对于其他配方施肥方法的参数管理同样具有参考意义。

关键词: 区域, 区域, 耕地, 变化, 原因, 措施

Abstract: 【OBJECTIVE】Nutrient balance and fertilizer recommendation is a very important method of prescription fertilization. The calculation of fertilization decision depend on mass of data as inputting parameters. So the valid management of these data by database is a key technology. 【RESULTS】The author analyzed the data model of the relative data in further. Firstly, the formulas of this method was presented in brief, then these data were analyzed by entity-relationship method of the data modeling and 8 entities and 12 relationship objects were proposed based on the formulas to expression them. Finally, the entire entity-relationship diagram was presented. 【CONCLUSION】The analysis method is also propitious to the parameter management of other method of prescription fertilization.

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