In order to study the differences, seasonal variations and influencing factors of soil CO₂ concentration in different ecosystems, we conducted annual fixed-point monitoring of soil CO₂ concentration, oxygen (O₂) levels, enzyme activities, and labile carbon/nitrogen indicators across suburban wasteland, forestland, and grassland ecosystems from March 2023 to February 2024. The results revealed that the grassland had the highest average annual CO₂ concentration, followed by the forest, with the wasteland having the lowest. The subsurface soil CO₂ concentration of each ecosystem was higher than that of surface layer. The soil CO₂ concentration of the three ecosystems was high in summer and low in winter, and was in the middle in spring and autumn. There were disparities in soil physical and chemical properties, carbon and nitrogen contents, and hydrolase activities among different ecosystems. In all ecosystems, the soil CO₂ concentration increased exponentially with rises in air temperature, soil temperature and water content, yet displayed an exponential negative correlation with oxygen concentration.

为了研究城郊不同生态系统土壤CO₂浓度的差异、季节变化及其影响因素, 于2023年3月—2024年2月对城郊荒地、林地和草地生态系统土壤进行周年定位监测, 分析土壤CO₂浓度、O₂浓度、酶活性和活性碳氮指标的变化特征。结果表明, 草地的年均CO₂浓度最高, 荒地最低, 林地居中; 各生态系统土壤CO₂浓度亚表层均高于表层; 3种生态系统土壤CO₂浓度的季节变化均表现为夏季高, 冬季低, 春秋季居中; 不同生态系统的土壤碳氮含量及水解酶活性等存在差异; 各生态系统土壤CO₂浓度随气温、土壤温度和含水量指数增加而增加, 与O₂浓度呈指数级负相关。