Does L. Affect Carbon and Nitrogen Contents, Enzymatic Activities, and Bacterial Communities in Soil Treated with Different Forms of Nitrogen Deposition?

The deposition of nitrogen in soil may be influenced by the presence of different nitrogen components, which may affect the accessibility of soil nitrogen and invasive plant-soil microbe interactions. This, in turn, may alter the success of invasive plants. This study aimed to clarify the influences of the invasive plant L. on the physicochemical properties, carbon and nitrogen contents, enzymatic activities, and bacterial communities in soil in comparison to the native plant (Houtt.) Shih treated with simulated nitrogen deposition at 5 g nitrogen m yr in four forms (nitrate, ammonium, urea, and mixed nitrogen). Monocultural resulted in a notable increase in soil pH but a substantial decrease in the moisture, electrical conductivity, ammonium content, and the activities of polyphenol oxidase, β-xylosidase, FDA hydrolase, and sucrase in soil in comparison to the control. Co-cultivating and resulted in a notable increase in total soil organic carbon content in comparison to the control. Monocultural resulted in a notable decrease in soil bacterial alpha diversity in comparison to monocultural . Soil FDA hydrolase activity and soil bacterial alpha diversity, especially the indices of Shannon's diversity, Simpson's dominance, and Pielou's evenness, exhibited a notable decline under co-cultivated and treated with nitrate in comparison to those treated with ammonium, urea, and mixed nitrogen.