运用三因素五水平二次正交旋转组合试验设计方法，研究了川中丘区“麦／玉／苕”模式玉米的播种期、栽植密度和氮化肥用量对产量及其主要经济性状的影响，建立了相应的数学模型，得出郑单１４在育苗移栽、地膜覆盖栽培条件下产量６．７５ｔ／ｈｍ２以上的高产栽培技术方案为：播种期３月５～１５日、栽植密度６．４～７．０株／ｍ２、氮化肥用量２２０～２７０ｋｇ／ｈｍ２ The effects of sowing date, planting density and amount of nitrogenous fertilizer on the yield and its main economic traits of “Maize / Jade / Chuan” model maize in central Sichuan hilly area were studied using the method of quadratic orthogonal quadratic rotation combined design of three factors and five levels. The corresponding mathematical model was obtained and the high-yielding cultivation technique scheme of Zhengdan 14 with yield above 6.75t / hm2 under the conditions of seedling transplanting and plastic film mulching cultivation was as follows: sowing date March 5-15, planting density 6.4 ~ 7.0 plants / m2, nitrogen fertilizer dosage 220 ~ 270kg / hm2