Biochar increases pakchoi yield by regulating soil bacterial communities but reduces it through soil fungi in vegetable soil

Biochar has been proven to mitigate the detrimental impacts on the high use of nitrogen (N) fertilizer on vegetable yield by influencing the microbial community, but the impacts on the microbial pathway of biochar remain unclear. A pot experiment of pakchoi was conducted with eight treatments, including normal level (100 mg N kg−1: N1) and high level (200 mg N kg−1: N2) of N fertilizer treatments, as well as four biochar levels (0