森林与环境学报2026，Vol.46Issue(2)：123-130,8.DOI:10.13324/j.cnki.jfcf.202507009
不同干扰强度对闽楠林土壤酶化学计量特征的影响
Response characteristics of soil enzyme activities to disturbance intensities in Phoebe bournei forests
摘要
Abstract
To assess the impacts of human disturbance on soil extracellular enzyme activities and their stoichiometry and to further elucidate the ecological processes and mechanisms of nutrient cycling in forest ecosystems,this study selected Phoebe bournei forests under mild and severe human disturbance intensities in Jianyang,Fujian,China as the research objects.Soil samples(0-10 cm depth)were collected to determine the activities of four enzymes:β-glucosidase(BG),β-1,4-N-acetylglucosaminidase(NAG),leucine aminopeptidase(LAP),and acid phosphatase(AP),along with soil physicochemical properties and microbial biomass.Enzyme stoichiometry and vector analysis were employed to characterize the enzyme activity patterns and nutrient limitations under different disturbance intensities.The results showed that BG activity was significantly higher under mild disturbance than under severe disturbance,whereas LAP activity showed the opposite trend.Severe disturbance resulted in significantly higher N-acquiring enzyme(LAP)activity than mild disturbance.In contrast,the enzymatic C∶N and C∶P ratios were higher under mild disturbance.Vector angles were below 45° under both disturbance intensities,indicating a consistent nitrogen(N)limitation on microorganisms.Moreover,the vector length decreased significantly as the disturbance intensity enhanced.Redundancy analysis identified soil microbial biomass carbon,soil nutrients,pH,and water content as key factors influencing BG,NAG,LAP,and AP activities.Increased disturbance intensity led to reduced C-acquiring enzyme activity,increased N-acquiring enzyme activity,and decreased enzymatic C∶N and C∶P ratios.关键词
闽楠/干扰/土壤/胞外酶活性/养分限制Key words
Phoebe bournei/disturbance/soil/extracellular enzyme activities/nutrient limitation分类
资源环境引用本文复制引用
朱德煌,陈欣怡,刘金福..不同干扰强度对闽楠林土壤酶化学计量特征的影响[J].森林与环境学报,2026,46(2):123-130,8.基金项目
福建省自然科学基金项目"武夷山不同海拔梯度下‘植物-凋落物-土壤’的生态化学计量特征"(2021J05248) （2021J05248）
武夷学院引进人才科研启动项目"武夷山山地与湿地生态系统生态化学计量及其机制研究"(YJ202103) （YJ202103）
福建省高校生态与资源统计重点实验室开放课题项目"闽楠林生态系统的化学计量特征及其保护机制研究"(PTJH17011-5). （PTJH17011-5）
