Skip to main content
. 2014 Aug 15;9(8):e104540. doi: 10.1371/journal.pone.0104540

Figure 7. Relationship between changes of nitrogen nutrition index (ΔNNI) and changes of nitrogen application rates (ΔN, kg N ha−1) at different growth stages in experiments conducted during 2010 and 2011.

Figure 7

The open symbols represent different growth stages for LXY-18 while filled symbols represent different growth stages for WXJ-14. (ΔN = A×ΔNNI+B; A = −16.60×DAT+2101, R2 = 0.95; B = −0.024×DAT2+2.57×DAT−40.07, R2 = 0.62).