Effects of nitrogen deposition on the rhizosphere nitrogen-fixing bacterial community structure and assembly mechanisms in <i>Camellia oleifera</i> plantations.

There were no significant differences between the N40 and N160 treatments, indicating that when the amount of nitrogen deposition exceeded a certain value, further nitrogen deposition did not significantly increase the content of soil organic matter and total nitrogen, instead it showed a decreasing trend ( Figure 1 ).

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