不同水肥组合对玉米产量与耗水量的影响

Effects of different water and fertilizer combinations on yield and water consumption of maize

通过玉米水肥耦合盆栽试验,根据玉米产量和耗水量的试验结果,建立了不同水肥(氮)组合条件下玉米产量和耗水量的关系模型。结果表明,增加水、氮的施用量对产量有提高作用,影响顺序为水>氮。交互项系数为正值,说明水、氮配合为正交互效应,具有相互促进的作用。灌水量保持田间持水量的95.13%,施氮量为243 kg·hm-2时,预计能获得最高产量为12 132.95 kg·hm-2。

Through the interaction between water and fertilizer of the maize-grown experiment, according to the experiment results of maize＇s yield and water consumption, established a relation model of yield and water consumption with different water and ferbilizer （nitrogen） combinations. The results showed that the increase of water and nitrogen application amount could increase the yield, and water had better effect than nitrogen. The positive coefficient of water and nitrogen indicated their positive interaction effects. It was estimated that the maximum yield of 12 132.95 kg ·hm^-2 could be obtained when the irrigation amount kept for 95.13% of field water capacity and nitrogen appilication amount was 243 kg· hm^-2.