Fig. 5

Quantification of different metabolites of soil after RSD treatment. (a) Longitudinal is the clustering of samples, and cross-sectional is the clustering of metabolites, with shorter clustering branches representing higher similarity. The cross-sectional comparison shows the relationship of the clustering of the metabolite content between groups. (b) The graphs indicate the total numbers of significant different metabolites at the corresponding comparison groups, in which black and grey bars stand for the numbers of significantly upregulated (num. of Sig. down) and significantly downregulated different metabolites (num. of Sig. down), respectively.