福建师范大学学报（自然科学版）2025，Vol.41Issue(5)：101-107,140,8.DOI:10.12046/j.issn.1000-5277.2025050073
不同土地利用方式下亚热带土壤胞外酶活性及其化学计量特征
Extracellular Enzyme Activities and Their Stoichiometric Characteristics in Subtropical Soils Under Different Land-Use Types
摘要
Abstract
Land-use change,as a primary human activity,greatly influences soil extracellular enzyme characteristics and indirectly regulates soil biogeochemical cycling.This study examined subtropical forest,orchard,and cropland soils to investigate soil extracellular enzyme activities and their stoichiometric characteristics under different land-use types.The results showed that the activi-ties of cellulose hydrolase(1.95 nmol·g-1·h-1)and β-N-acetylglucosaminidase(96.05 nmol·g-1·h-1)was higher in orchard soils.The acid phosphatase activity in forest soils was 2.89 and 2.46 times higher than that in orchard and cropland soils,respectively.Soil nitrate nitrogen and available nitrogen were identified as key environmental factors influencing extracellular enzyme activ-ities.The enzymatic C∶N∶P stoichiometric ratios were 1∶1.24∶2.05,1∶1.40∶1.50,and 1∶0.84∶1.92 in the forest,orchard,and cropland soils,respectively,with vector angles over 45° across all land-use types,indicating phosphorus limitation.The higher vector length(1.31)of cropland soils indicated carbon limitation.Therefore,subtropical land-use change markedly alters soil extracellular enzyme activities and their stoichiometric characteristics,providing a scientific ba-sis for sustainable land management in subtropical regions.关键词
土壤生态系统/养分循环/胞外酶活性/化学计量特征/亚热带地区/土地管理/森林生态系统/农业生态系统Key words
soil ecosystem/nutrient cycling/extracellular enzyme activity/stoichiometric characteristic/subtropical region/land management/forest ecosystem/agricultural ecosystems分类
农业科技引用本文复制引用
耿文迪,胡珂,江子怡,梁周舟,陈煜姗,邹丽媛,施秀珍,王建青..不同土地利用方式下亚热带土壤胞外酶活性及其化学计量特征[J].福建师范大学学报（自然科学版）,2025,41(5):101-107,140,8.基金项目
国家自然科学基金面上项目(32271679) （32271679）
福建省自然科学基金项目(2024J09029、2023R1002004) （2024J09029、2023R1002004）
