【摘要】 试验采用二次回归正交旋转组合设计,研究了耐旱型玉米子粒产量与密度(x1) 、播期(x2) 、氮肥(x3) 、磷肥(x4) 、钾肥(x5) 五因素的定量关系,建立了产量形成的密度、播期、肥料反应模型,解析了各因素对产量的主效应及互作效应,寻出定量生产水平下的最佳农艺措施。本文得出的耐旱型玉米高产栽培措施为:每公顷植6 ～9 万株,3 月15 日～30 日播种,每公顷施尿素450 ～675 kg 、磷肥( 过磷酸钙)675-0 ～1 012-5 kg 、钾肥( 氯化钾)112-5 ～225-0 kg 。更多还原

【Abstract】 The relationship on grain yield of drought-resistive type maize with density,sowing time,nitrogen,phosphorus and potash fertilizers were studied A mathematical model involving the five factors which a effect yield was established by using the orthogonal rotation design of quadratic regression in arid areas of purple-soil hill of Sichuan mid The effects of individual factor and its interactions on yield were determined and the optimum agronomic practices in certain conditons were found by analsing the model.The optimum comprehensive practives for high yield of drought resistive maize were,deusity of 60 000～90 000 plants per hm 2,Sowing time on Mar.15～30,Nitrogen 450～475 kg,Calciumsuperphospate 675～1 012.5 kg and muriate 112.5～225.0 kg per hm 2.更多还原