不同地力水平下的小麦施肥效应

徐霞,赵亚南,黄玉芳,闫军营,叶优良

Fertilization Effect of Wheat Under Different Soil Fertilities

Xia XU,YaNan ZHAO,YuFang HUANG,JunYing YAN,YouLiang YE

图2 不同基础地力水平下河南省小麦氮磷钾配施的增产量、增产率 箱形框中的实线和正方形分别表示数据集的中值和平均值,上下边界分别表示数据集的25%和75% 位分数,上下水平短线表示数据集的5%和95%区间,箱外上下圆点分别表示数据集的最小值和最大值。误差线上部的小写字母表示不同地力水平间的差异显著（P<0.05）。下同

Fig. 2 Wheat yield increase and yield increase rate of NPK fertilizers under different soil fertilities in Henan Province The horizontal solid lines and squares inside boxes indicate the median and the mean of dataset, the upper and lower limits of box represent 25% and 75% of dataset, the upper and lower short lines outside box indicate the 5% and 95% of dataset, the upper and lower dots outside box indicate the minimum and maximum, respectively. Letters above histogram indicate statistical significance among different classification of soil fertilities (P<0.05). The same as below