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通过对上海郊区青紫泥类型土壤的大量田间试验、室内模拟试验、土壤分析和长期定位试验等研究,对青紫泥类型土壤供氮、磷、钾进行模式化处理,同时对早稻的产量和肥料用量、品种与产量、移栽时间与产量进行了系统研究和调查,形成供计算机编制施肥量方案的参数。并用BASIC语言编制成包括地区、品种、茬口、移栽期、土壤有机质等9-10个因素的计算机施肥程序。利用这个程序可计算该地区农户早稻的施肥量方案。经过两年田间小区试验和一年的大面积早稻试验,统计结果有较好的一致性。平均偏差小于5-10％。
Through field experiments, indoor simulation experiments, soil analysis and long-term experiment on the brucite-type soils in Shanghai suburbs, nitrogen, phosphorus and potassium in the soil were analyzed. The yield and the amount of fertilizer , Variety and yield, transplanting time and yield were systematically studied and investigated to form the parameters for the compilation of the program of fertilizer application by the computer. And compiled with BASIC language, including the region, varieties, stubble, transplanting period, soil organic matter and other 9-10 factors of computer fertilization program. Use this program to calculate the amount of fertilizer for farmers in the region’s early rice program. After two years of field plot test and one year of large-scale early rice experiment, the statistical results are in good agreement. The average deviation is less than 5-10%.