生态学杂志2026，Vol.45Issue(2)：530-537,8.DOI:10.13292/j.1000-4890.202602.025
林火干扰对大兴安岭土壤化学和微生物性质的影响
Effects of forest fire disturbance on soil chemical and microbial properties in the Da Xing'anling Mountains
摘要
Abstract
Wildfires in forests impact soil nutrient contents,and thus influence vegetation restoration and the eco-logical balance of soil.Therefore,it is crucial to explore the impact of wildfires on soil chemical and microbial prop-erties.We compared soil properties between current-year burned areas and adjacent unburned forests in the Da Xing'anling Mountains.Using paired sample t-tests,we analyzed the changes in soil nutrient contents and microbi-al characteristics in response to wildfire disturbances.The results showed that wildfire significantly increased the contents of ammonium,available phosphorus and microbial biomass phosphorus by 80.6％,14.6％,and 14.1％,respectively.In contrast,microbial biomass carbon(MBC),microbial biomass nitrogen(MBN),the ratios of MBC to microbial biomass phosphorus(MBP)and MBN to MBP decreased by 25.4％,39.8％,29.9％,and 45.9％,respectively.Both redundancy analysis and linear fitting analysis indicated that total phosphorus,ammoni-um,soil N∶P,and microbial biomass C-N-P stoichiometric ratio were significantly correlated with soil enzyme ac-tivities.Additionally,multiple regression analysis revealed that soil total phosphorus and carbon positively influ-enced the exoglucanase activity,with total phosphorus exhibiting the highest explanatory variation.Overall,this study found that wildfires contribute to the accumulation of available nutrients in soils in the short term primarily due to the return of nutrients from litters and trees after fires.However,wildfires may compromise the sustainable nutrient storage and ecological stability of soils in the long term.Therefore,it is necessary to remove high-risk litters to reduce the occurrence of forest fires.关键词
火烧迹地/森林土壤/土壤养分/微生物生物量/酶活性Key words
burned area/forest soil/soil nutrient/microbial biomass/enzyme activity引用本文复制引用
王迪,杨凯,徐爽,高健,王琪琪..林火干扰对大兴安岭土壤化学和微生物性质的影响[J].生态学杂志,2026,45(2):530-537,8.基金项目
国家重点研发计划(2022YFF1300500)和辽宁省自然科学基金(2024JH3/50100019)资助. （2022YFF1300500）
