黑龙江省半干旱区玉米磷水耦合效应及优化模型

Interaction of water and phosphorus coupling on maize and optimum model in the semiarid area of Heilongjiang province

采用二元二次饱和D-最优试验设计方案(206),通过抗旱棚进行盆栽春玉米试验,在固定N、K肥料用量的前提下,对P肥和水的耦合效应进行了研究。结果表明,P和水配合存在阈值反应,通过对所建数学模型的计算机模拟,提出了不同决策目标下的水肥优化方案。

Duality quadratic saturating D-optimum design were carried out under pot experiment to study the interaction of P fertilizer and water coupling at a given level of N and K.The results showed that the threshold value existed in water-fertilizer interaction.The optimal scheme of water-fertilizer interaction under objectives was worked out by computer simulation on a mathematical model which was established based on the result of experiment.