Metabolomics analysis of the effect of acidification on rhizosphere soil microecosystem of tea tree.

In this study, we analyzed the effects of acidification on the physicochemical properties, microorganisms and metabolites of tea rhizosphere soils with different pH values, and the results showed that with the increase of soil pH, the organic matter content, cation exchange capacity, microbial biomass carbon, microbial biomass nitrogen, microbial respiration intensity, bacterial number and actinomyces number in tea rhizosphere soil all showed an increasing trend, while the fungi number decreased.

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The results of the principal component analysis of the primary classification of soil metabolites showed ( Figure 4B ) that 11 categories compounds could effectively distinguish three different soil samples, among which 3 categories compounds with a decreasing trend followed by an increasing trend could effectively distinguish soil samples with pH values of 3.29 and 5.32, while 7 categories compounds with an upward trend and the 1 category compound with an upward trend followed by a downward trend could effectively distinguish soil samples with pH values of 4.74 and 5.32.

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