SMB01 Variation in soil respiration and bacterial community due to species-specific plant-soil history at konza prairie

We conducted a “home vs. away” plant-soil feedback greenhouse experiment using two C3 grass species (Bromus inermis and Pascopyrum smithii) grown in soil collected from Konza Prairie. We used a closed-circuit CO2 trapping method and isotopic analysis to differentiate between root-derived and SOM-derived CO2 production. We investigated how soil chemistry and soil bacterial communities differed in soils with a history of B. inermis vs soils with a history of P. smithii.本研究以康扎草原（Konza Prairie）采集的土壤为基质，针对两种C3草本植物——无芒雀麦（Bromus inermis）与史密斯冰草（Pascopyrum smithii），开展了“本土vs异源”植物-土壤反馈温室实验。本研究采用密闭循环CO₂捕集法与同位素分析技术，对根系来源与土壤有机质（Soil Organic Matter, SOM）来源的CO₂产生量进行区分，并探究了具有无芒雀麦（B. inermis）种植历史的土壤与具有史密斯冰草（P. smithii）种植历史的土壤之间，土壤化学性质与土壤细菌群落的差异。