晚播小麦高产限制因素研究

1997～ 1998年在泰安市农科所农场采用 4因素 3水平正交法 ,研究晚播小麦高产的主要限制因素。结果表明 ,4个限制因素的效应依次为 :施氮时期及比例 >施纯氮肥量 >播期 >播量。晚播小麦施足钾肥、磷肥、少施氮肥 ,冬前不追氮肥 ,拔节期多追氮肥 ,就能获得高产。

Studies on the Limiting Factors of High Yield of Later Seeding Wheat

The main limiting factors of later seeding wheat had been studied with the method of four factors at three levels in Taian Agricultural Institute from 1997-1998. The results showed the effect of the four factors was different, the conquest succession of them was as follow: additional nitrogen and the ratio of application, the amount of pure nitrogen, seeding time, the amount of seeding. Later seeding wheat would reach the high yield if enough K and P, little N and no N were applied before winter and more N, in jointing stage.