Figure 3

The relationship between P concentration of T1 at stem elongation stage (a) and anthesis stage (b) and percentage of earbearing tiller in 2015, 2016 and 2017. The sample size which is not enough 24 means no tiller 1 was found in harvested plants in some specific experiment plots. **, *** indicates that regressions are significant at P < 0.01 and P < 0.001.