Figure 9

Heat map of Pearson's correlation coefficient matrix between the wintering Chinese chives quality variables and available P and total P. The values in the figure are Pearson's correlation coefficient. * and ** denote correlation coefficients that are significant at p < 0.05 and 0.01 level, respectively. Heat map of Pearson's correlation coefficient matrix was produced by OriginPro 2019b 32Bit.