Effects of different nitrogen levels on growth and rhizosphere soil microorganisms of Idesia polycarpa Maxim

The study found that the primary metabolic pathway of bacteria in the rhizosphere soil of <i>I. polycarpa</i> was metabolism, while the main metabolic pathways of fungi were biosynthesis, precursor metabolism, and energy synthesis. Furthermore, an N application rate of 1.2-2.4 g per plant per month is recommended for optimal growth during the early rapid growth phase of <i>I. polycarpa</i>.