福建师范大学学报（自然科学版）2026，Vol.42Issue(3)：53-59,7.DOI:10.12046/j.issn.1000-5277.2025120035
火烧对亚热带森林土壤微生物胞外酶化学计量的影响
Effects of Fire on Soil Microbial Extracellular Enzyme Stoichiometry in Subtropical Forests
摘要
Abstract
Fire is an important disturbance factor in soil nutrient cycling in forest ecosystems.Based on soil samples from unburned control and burned plots in a subtropical forest in Shanghang County,Fujian Province,this study analyzed the stoichiometric characteristics of extracellular enzyme activities related to carbon(C),nitrogen(N),and phosphorus(P)cycling and evaluated the effects and mechanisms of fire on microbial resource allocation and nutrient limitation.The results showed that fire significantly increased the enzymatic C∶N and C∶P ratios,indicating an intensification of relative C limitation of soil microorganisms.In contrast,the enzymatic N∶P ratio significantly de-creased,suggesting aggravated relative P limitation.In control soils,microbial nutrient limitation was primarily regulated by soil nutrient stoichiometry,whereas after fire,soil biodiversity and pH be-came the key factors modulating microbial nutrient limitation.These findings provide a scientific ba-sis for subtropical forest conservation and post-fire ecological restoration.关键词
森林火烧/胞外酶活性/亚热带森林/酶化学计量/微生物多样性/生态系统/土壤养分/微生物养分限制Key words
forest fire/extracellular enzyme activity/subtropical forest/enzyme stoichiomet-ry/microbial diversity/ecosystem/soil nutrients/microbial nutrient limitation分类
农业科技引用本文复制引用
马孝刚,林德宝,顾亚宁,蒋佳雯,吴琳芳,周鲁宏..火烧对亚热带森林土壤微生物胞外酶化学计量的影响[J].福建师范大学学报（自然科学版）,2026,42(3):53-59,7.基金项目
国家自然科学基金面上项目(32572023) （32572023）
国家自然科学基金青年项目(32201528) （32201528）
福建省自然科学基金面上项目(2025J01647) （2025J01647）
