黑龙江西部旱作玉米水肥生产潜力试验研究

Potential Maize Water-fertilizer Productivity of Dryland Farming in the West Region of Heilongjiang Province

以氮肥、磷肥、补水量为试验因子,以玉米产量为指标,利用MINITAB15统计分析软件进行试验设计和数据分析,通过响应曲面法建立水肥相互作用对玉米产量影响的二次多项数学模型。利用模型的等值线图对影响玉米产量的关键因子及其相互作用进行了探讨,以玉米产量为响应值优化得出玉米生产潜力田间试验值的条件：氮肥为241.1 kg/hm2,磷肥为173.1 kg/hm2,补水量为108.3 m3/hm2,玉米田区生产潜力试验值为12 224 kg/hm2。

Using response surface methods of MINITAB15-statistical data analysis software,the paper studied the effect of N-fertilizer,K-fertilizer and water on the maize yield,built a quadratic regression equation of the effect of water-fertilizer interaction on the maize yield.And studied key factors and their interaction on the maize yield with their corresponding contour plots.According to the above results,the optimum potential maize water-fertilizer productivity conditions were obtained as follows： N-fertilizer 241.1 kg/hm2,K-fertilizer 173.1 kg/hm2 and water 108.3 m3/hm2.Under these conditions,the maize yield is up to 12 224 kg/hm2.