3.1 Soil abiotic and biotic properties and stoichiometric characteristics
N and P additions differently affected soil abiotic and biotic properties (Table S1, Table S2). Nutrient additions increased soil AN, with the pattern of N> NP >P>Control, but decreased soil pH, SOC (Table S1). Compared with Control, P and NP addition decreased soil C:N (Figure 1). N addition increased C:P and N:P while NP and P addition decreased soil C:P and N:P. Nutrient additions increased microbial C:N while decreased microbial C:P and N:P, with the lowest C:P and N:P under P addition.