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采用田间试验的方法，对苏南地区麦玉米稻三熟制中套作春玉米的合理施肥量和肥料配比进行了研究。结果表明，氮、磷和有机肥三因子对产量有较大的贡献，而钾肥增产作用不明显。产量与氮、磷化肥和有机肥之间的三元二次生产函数分析表明，氮肥与有机肥及磷肥与有机肥之间有明显的互作效应。在苏南中上等肥力水稻土上，套作春玉米７５００ｋｇ／ｈｍ２以上产量水平的肥料运筹为：总氮量２２５～３００ｋｇ，其中化肥氮１５０～２２５ｋｇ，有机氮７５～１５０ｋｇ；无机磷肥用量为７５～１５０ｋｇ。若有机肥取高限，则磷肥直取低限。
Field experiments were conducted to study the reasonable fertilization rate and fertilizer ratio of spring maize intercropping with wheat maize rice in the southern part of Jiangsu Province. The results showed that nitrogen, phosphorus and organic fertilizer three factors have a greater contribution to yield, while the effect of increasing potassium yield is not obvious. Analysis of the yield and the nitrogen, phosphorus and organic fertilizer between the three quadratic production function analysis showed that there is a clear interaction between nitrogen and organic fertilizer and phosphate fertilizer and organic fertilizer. In the upper fertile paddy soil in southern Jiangsu Province, the fertilizers for spring maize yield above 7500kg / hm2 were: 225 ~ 300kg of total nitrogen, of which 150 ~ 225kg of nitrogen fertilizer and 75 ~ 150kg of organic nitrogen; 75 ~ 150kg. If the organic fertilizer to take high limit, then take the lower limit of phosphate fertilizer.