【摘要】 采用三元二次正交旋转组合设计,研究行距、密度、施氮量与玉米新品种晋单71号产量之间的关系,为晋单71号高产栽培提供理论依据。结果表明,晋单71号产量与行距、密度、施氮量栽培因素相关的数学模型为Y=10 383.333 04+81.627 00X1-105.970 29X2+783.331 25X3-198.173 32X21-144.433 21X22-458.211 85X23-12.625 00X1X2+61.375 00X1X3+140.125 00X2X3。通过分析寻优,确立了晋单71号获得了10 708 kg/hm2以上产量水平的行距、密度、施氮量3个因素的优化方案为:行距55 cm、密度6万株/hm2、纯氮施用量415 kg/hm2;行距、密度、施氮量对玉米新品种晋单71号产量的影响达95.6%;各因素对晋单71号产量的影响大小依次为施氮量>密度>行距。更多还原

【Abstract】 By adopting ternary quadratic orthogonal rotating combination design,the relationship between row spacing,density,nitrogen rate and the yield of new maize variety Jindan 71 was studied to provide theoretical basis for high yield cultivation.The results showed that,the related mathematical model between the yield of Jindan 71 and three cultivation factors(row spacing,density,nitrogen rate and so on) is Y=10 383.333 04+81.627 00X1-105.970 29X2+783.331 25X3-198.173 32X21-144.433 21X22-458.211 85X23-12.625 00X1X2+61.375 00X1X3+140.125 00X2X3;By optimal analysis,we established that optimization scheme to obtain the yield level over 10 708 kg/hm2: row spacing 55 cm,density 60 000 plants/hm2,pure nitrogen rate 415 kg/hm2(46% of urea reduced pure nitrogen);the effect of row spacing,density,nitrogen rate to the yield of new maize variety Jindan 71 was 95.6% and the effect of each factor follows an order as: nitrogen rate>density>row spacing.更多还原