Except the organic matter content in treatment with M1 as the preceding crop, the soil physicochemical properties organic matter, available phosphorus, available potassium and urease activity showed a trend of first decreasing and then increasing.
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Insights into soil bacterial and physicochemical properties of annual ryegrass-maize rotation (ARMR) system in southern China.
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However, a decreasing trend was observed in the soil bacteria Verrucosispora (Fig S1), which can produce exotoxins and thus cause certain plant diseases 19 .
Previous studies have shown that members of the Gemmatimonadetes participate in sulfate reduction and low pH will reduce the abundance of Gemmatimonadetes 25 , 26 , which is in accordance with the highly significant positive correlation observed between the abundance of Gemmatimonadetes and soil pH in this study.