热带-亚热带典型山地常绿阔叶林与混交林土壤酶活性及其化学计量比变化特征

Soil enzyme activity can be used to indicate the physiological activities of microbial communities, and is critical to nutrient supply and ecosystem services. Soil enzyme activity and stoichiometry related to C（BG：β-glucosidase）, N（NAG：β-N-acetyl-glucosaminidase；LAP：Leucine amino-peptidase） and P（AP：Acid phosphatase） cycling were investigated in deciduous and broad-leaved or coniferous and broad-leaved mixed forests and evergreen broad-leaf forest in a tropical (Jianfengling) and subtropical.Soil nutrient content and enzyme stoichiometry differed profoundly among study sites and vegetation types, only AP differed among vegetation types, BG and NAG+LAP）were influenced by the interaction between vegetation type and study site. Therefore, C:NEEA and C:PEEA differed profoundly among vegetation type while N：PEEA was controlled by the interaction between vegetation type and study site. The vector length of soil enzyme was longer in mixed forests as compared with evergreen broadleaved forests, and the vector angle was impacted by the interaction between vegetation type and study site. SOC, EC、C:N and N:P was the dominant drivers of soil enzyme activity and stoichiometry, therein, BG and （NAG+LAP）were positively related with soil nutrient content and nutirent stoichiometry; C:NEEAwas positively related with soil C:Nand N:P, N:PEEAwas positively related with SOC and TP. This study demonstrated that the variations of soil enzyme activity and stoichiometry were controlled by SOC and nutrient stoichiometry among vegetation and study sites in tropical and subtropical forests.