利用湖南省近8 a 789个杂交中稻"3414"肥效试验结果,分析获得杂交中稻施肥技术参数,依据斯坦福施肥公式W=(UNs)/R,建立了氮、磷、钾实际施肥纯量(Y)与目标产量(X1)、土壤速效养分检测值(X2)的二元一次回归推荐施肥数学模型;在...利用湖南省近8 a 789个杂交中稻"3414"肥效试验结果,分析获得杂交中稻施肥技术参数,依据斯坦福施肥公式W=(UNs)/R,建立了氮、磷、钾实际施肥纯量(Y)与目标产量(X1)、土壤速效养分检测值(X2)的二元一次回归推荐施肥数学模型;在Excel中置入数学模型,建立了推荐施肥专家系统,直接输入目标产量和土壤养分数据,可精准计算输出施肥量和施肥方案,简化了数学模型的计算和应用方法,推动了测土配方施肥技术成果的应用。展开更多
In this study, taking cultivated land fertility evaluation data for example, we conducted a preliminary study of GIS theory and spatial data management, and construct the frame system of mobile structure based on the ...In this study, taking cultivated land fertility evaluation data for example, we conducted a preliminary study of GIS theory and spatial data management, and construct the frame system of mobile structure based on the three layer structure model of application layer, business logic layer and data layer. Then we established a spatial data storage model, which has unified the data standards and achieved the management of spatial data and attribute database. Taking ArcGIS API for iOS as GIS platform, Xcode as the tool, we have realized the functions of data integration, data query, data statistics and fertilization recommendation, and constructed the management and service platform of mobile fertilization expert system.展开更多
文摘利用湖南省近8 a 789个杂交中稻"3414"肥效试验结果,分析获得杂交中稻施肥技术参数,依据斯坦福施肥公式W=(UNs)/R,建立了氮、磷、钾实际施肥纯量(Y)与目标产量(X1)、土壤速效养分检测值(X2)的二元一次回归推荐施肥数学模型;在Excel中置入数学模型,建立了推荐施肥专家系统,直接输入目标产量和土壤养分数据,可精准计算输出施肥量和施肥方案,简化了数学模型的计算和应用方法,推动了测土配方施肥技术成果的应用。
文摘In this study, taking cultivated land fertility evaluation data for example, we conducted a preliminary study of GIS theory and spatial data management, and construct the frame system of mobile structure based on the three layer structure model of application layer, business logic layer and data layer. Then we established a spatial data storage model, which has unified the data standards and achieved the management of spatial data and attribute database. Taking ArcGIS API for iOS as GIS platform, Xcode as the tool, we have realized the functions of data integration, data query, data statistics and fertilization recommendation, and constructed the management and service platform of mobile fertilization expert system.