冬小麦氮肥肥料效应模型的选择及其对推荐施氮效果的影响

通过冬小麦６个氮水平试验对四个施肥模型在冬小麦上的拟合性进行了比较，结果四个模型均能很好地拟合产量和施氮量之间的关系，进上步从模型的最佳施氮量、施肥的经济效应以及肥料利用率等方面综合评价，其结果是以线性加平台模型最佳。

Study on the Select of Nitrogen Fertilization Models for Winter Wheat and the Effects of it on Result of Fertilizing Nitrogen

Based on the field experiments of six levels of nitrogen fertilizers for winter wheat,four fertilization models including linear plus plateau, quadratic, square root and quadratic plus plateau were comparably studied. Results indicated that these four models could be used to describe the response of winter wheat yield to nitrogen fertilizer, but the best model was linear plus plateau according to the fitness of models and optimum rates of fertiliation and recovery of fertilizer.