et al., 2012 ), which showed a trend of increasing at first and then decreasing, and was lower in the p-coumaric acid treatment (50 μg/mL) than the control soil ( Figure 11B ).
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Metabolomics and Microbiomics Reveal Impacts of Rhizosphere Metabolites on Alfalfa Continuous Cropping.
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The relative abundance of bacterial species decreased to different degrees, with 8 main bacterial species in the top 20 species showing a decreasing trend, 6 bacterial groups showing the trend of decreasing when treated with 10 μg/mL p-coumaric acid and increasing with 50 μg/mL, and five groups of bacteria showing the trend of increasing with 10 μg/mL and decreasing with 50 μg/mL ( Figure 11C ).