水肥耦合效应对平原区夏玉米产量的影响

为了研究不同水肥条件对夏玉米产量的影响,在防雨棚条件下进行盆栽试验,采用3因素5水平2次通用旋转回归组合设计,建立了灌水量、氮肥和钾肥施用量对夏玉米产量影响的数学模型。因素效应分析结果表明,影响夏玉米产量的主要因素是灌水量,其次是氮肥和钾肥的施用量。各因素交互作用对玉米产量的贡献为氮、水>钾、水>氮、钾;从产量角度评价灌水量、氮肥和钾肥施用量的最佳水肥调控组合。当灌水量、氮肥和钾肥施用量分别为450 mm、180 kg/hm2、120 kg/hm2时,玉米达到高产生产指标84.63 g/盆,为水肥调控的最佳组合。

The Coupling Effect of Water and Fertilizer on Summer Maize Yield of in the Plain

The coupling effects of water and fertilizer on yield of summer maize in the plain were investigated by using the general quadratic rotatory regression and solution culture.The pot trials were carried out in rain-protection shed and the mathematical models were established.Analysis showed that the dosage of water irrigation significantly influenced the yield of summer maize,followed by the amount of nitrogen and potash fertilizer.The interaction effects among these factors on the corn yield according to the order as N and water>K and water>N and K.From the aspect of maize yield,sufficient water with higher level of N and K was the best combination.Maize production could achieve the high yield goal 84.63 g / pot when irragation dose,the concentrations of nitrogen and potassium were 450 mm,180 kg / hm2,120 kg / hm2,respectively.