玉米新品种贵农玉889高产高效栽培模式研究

The Study on the Model of High-efficient and High-yield Cultivation for New Corn Cultivar Guinongyu 889

试验采用五因素二次回归正交旋转组合设计方案进行,研究玉米新品种贵农玉889在贵州低海拔地区的栽培模式,探讨了产量与播种日期、密度、施肥量(氮肥、磷肥、钾肥)之间的关系。建立了产量与各因素之间的数学模型:Y=23.92313+1.52042 X1+0.22708 X2+0.86125 X3+1.83875 X4+1.06625 X5-0.25094 X21-0.51844 X22-0.32094 X23-0.65844 X24-0.64219X25+0.06438X1X2+0.55063X1X3+0.11937X1X4+0.17188X1X5+0.87313X2X3+0.04937X2X4-0.22313X2X5-0.709 38 X3X4+0.04063 X3X5+0.85438 X4X5。结果表明,贵农玉889在贵州玉屏县的最优栽培状况为:播种日期是4月12日,密度为60000株/hm2,氮肥为345kg/hm2,磷肥为112.5kg/hm2,钾肥为225kg/hm2,可获得10105.05kg/hm2的产量。各因素对产量的影响水平为:磷肥>播种日期>钾肥>氮肥>密度。

5 factors quadratic regression orthogonal rotation design programs were tested on cultivation of new maize varieties Guinongyu 889 in YuPing, Guizhou , the relationship aI？ong yield and planting date, density, fertilizer （nitrogen, phosphate, potassium） was discussed. Established mathematics model between yield and another five factors： Y=23.92313＋1.52042X1＋0.2278X2＋0.86125X3＋1.83875X4 ＋1.06625X5-0.25094X1^2-0.51844X2^2-0.32094X3^2-0.65844X4^2-0.64219X5^2 ＋0.06438X1X2＋0.55063X1X3＋0.11937X1X4＋0.17188X1X5＋0.87313X2X3＋0.049317X2X4-0.22313X2X5-0.709 38X3X4＋0.04063X3X5＋0.85438X4X5. The results showed that Guinongyu 899 optimal cultivation conditions in Yuping .Guizhou is that planting date is April 12 , density of 60000plants/ hm2 of nitrogen fertilizer is 345kg / hm2 , phosphorus is 112. 5kg / hm2, potassium is 225kg / hm2, which can obtain the yield 673. 67kg / hm2, Final analysis of results of various factors on the yield level： P〉sowing date〉K〉N〉density.