热带亚热带植物学报2026，Vol.34Issue(4)：437-444,8.DOI:10.11926/jtsb.5031
入侵植物薇甘菊对土壤主要温室气体排放的影响:真菌主导N2O排放与低CO2当量特征
Influence of the Invasive Plant Mikania micrantha on Major Soil Greenhouse Gas Emissions:Fungal-dominated N2O Emissions and Low CO2-Equivalent Characteristics
摘要
Abstract
To reveal the impact of plant growth on soil N2O and CO2 emissions,a combined field and pot experi-ment was conducted to study the soil greenhouse gas emissions of Mikania micrantha and its competing plants,Pueraria lobata var.thomsonii and Ipomoea batatas.The results showed that the CO2 equivalent emissions from the soil where M.micrantha grew were significantly lower than those from the soil where P.lobata var.thomsonii and I.batatas grew,indicating a lower greenhouse effect potential.The relative contribution of fungi to N2O emissions(79.3%)was significantly higher than that of bacteria(58.1%).The random forest model revealed that total soil nitrogen(TN),nitrate nitrogen(NO3--N),and ammonium nitrogen(NH4+-N)were the core driving factors of greenhouse gas emissions(explaining more than 11%),and were significantly positively correlated with CO2 equivalent emissions(R²=0.49-0.82).The greenhouse gas emission effect of the soil where M.micrantha grows is closely related to the choice of control species.Compared with the local plants P.lobata var.thomsonii and I.batatas,the soil where M.micrantha grows shows a lower greenhouse effect potential,which may be related to the different nitrogen utilization strategies and nitrogen cycling microbial community regulation mechanisms of different plants.This provides an important reference for the assessment of the ecological effects of invasive plants,but further validation is needed by combining more species and long-term observations.关键词
薇甘菊/温室气体排放/微生物群落调控/氮循环Key words
Mikania micrantha/Greenhouse gas emissions/Microbial community regulation/Nitrogen cycle引用本文复制引用
周卫君,马耀,周启梦,王晓敏,杨雪,李伟华..入侵植物薇甘菊对土壤主要温室气体排放的影响:真菌主导N2O排放与低CO2当量特征[J].热带亚热带植物学报,2026,34(4):437-444,8.基金项目
国家自然科学基金项目(32172430)资助 This work was supported by the National Natural Science Foundation of China(Grant No.32172430). （32172430）
