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3 不同降水状况下旱地玉米植株氮浓度与地上部生物量的关系 a: 穗期多雨; b: 穗期干旱。Nc、Nmin和Nmax分别代表为春玉米植株氮浓度临界值、最小值和最大值。

Fig. 3 Relationships between the plant N concentrations and aboveground biomass of dryland spring maize under the different precipitation patterns a: rainy at the ear stage; b: drought at the ear stage. Nc, Nmin, and Nmax are critical nitrogen concentration, minimum, and maximum of nitrogen concentration in spring maize.