不同降雨状况下渭北旱地春玉米临界氮稀释曲线与氮素营养诊断

刘朋召,师祖姣,宁芳,王瑞,王小利,李军

Critical nitrogen dilution curves and nitrogen nutrition diagnosis of spring maize under different precipitation patterns in Weibei dryland

Peng-Zhao LIU,Zu-Jiao SHI,Fang NING,Rui WANG,Xiao-Li WANG,Jun LI

图7 不同降雨状况下旱地春玉米氮营养指数(NNI)与相对地上部生物量(RDW)的关系 a: 穗期多雨; b: 穗期干旱。缩写同图2。**表示0.01水平显著, ***表示0.001水平显著。

Fig. 7 Relationships between nitrogen nutrition index (NNI) and relative aboveground dry biomass (RDW) under different precipitation patterns in dryland spring maize a: rainy at the ear stage; b: drought at the ear stage. Abbreviations are the same as those given in Fig. 2. ** indicates significant at P ≤ 0.01; *** indicates significant at P ≤ 0.001.