生态学杂志2025，Vol.44Issue(8)：2487-2496,10.DOI:10.13292/j.1000-4890.202508.008
三江平原不同土地利用方式下土壤微生物碳代谢特征
Characteristics of soil microbial carbon metabolism under different land use patterns in Sanjiang Plain
摘要
Abstract
The Sanjiang Plain is the largest distribution area of marsh wetlands in China.Over the past 60 years,the land use patterns in the Sanjiang Plain have changed,and the soil physicochemical and biological properties have also been significantly affected.To clarify the differences in soil physicochemical properties and soil microbial functional activity under different land use patterns in Sanjiang Plain,we collected soil samples from 0-10 cm and 10-20 cm layer of cropland,forest,and wetland in the Nongjiang River Basin of Sanjiang Plain.Employing Biolog-ECO microplate technology,we analyzed soil microbial carbon source metabolic activity,carbon source utilization characteristics and functional diversity,and explored the effects of soil physicochemical properties on soil microbial carbon source metabolic activity under different land use patterns by using structural equation modeling(SEM).The results showed that soil microbial carbon source metabolism ability in 0-10 cm soil layer of forest was signifi-cantly higher than that of wetland and cropland.The carbon source metabolic activity in 10-20 cm soil layer of for-est and wetland was higher than that of cropland.Soil microbial Shannon index,Simpson index,and McIntosh in-dex were positively correlated with soil total carbon,dissolved organic carbon,microbial biomass carbon,total ni-trogen,microbial biomass nitrogen,ammonium nitrogen and nitrate nitrogen contents.After reclamation of wetland into cropland,the utilization ratio of amino acids by soil microorganisms was increased,while the utilization ratio of polymers was reduced.SEM results showed that soil microbial biomass carbon,ammonium nitrogen,total carbon,nitrate nitrogen,moisture content,and pH value were important factors affecting soil microbial carbon source meta-bolic activity.关键词
湿地/土地利用方式/碳源利用/微生物多样性/Biolog-ECO/结构方程模型Key words
wetland/land use pattern/carbon source utilization/microbial diversity/Biolog-ECO/structural equa-tion modeling引用本文复制引用
梅文锴,宋艳宇,李孟婷,王宪伟,朱梦圆,冯奕淞,王东旭,刘吉平..三江平原不同土地利用方式下土壤微生物碳代谢特征[J].生态学杂志,2025,44(8):2487-2496,10.基金项目
吉林省科技发展计划项目(20230101090JC,20240304025SF)和国家自然科学基金项目(42271109)资助. （20230101090JC,20240304025SF）
