东太湖不同植被类型湿地CO_(2)产生潜力对温度变化的响应  

esponse of CO_(2)Production Potential of Wetland with Different Vegetation Types in East Taihu Lake to Temperature Change

作　　者：杨玲玲 周琦 Yang Lingling;Zhou Qi(College of Environment and Ecologyg,Jiangsu Open University,Nanjing,Jiangsu 210036,China;College of Landscape Architecture,Nanjing Forestry University,Nanjing,Jiangsu 210037,China;Ecological Environmental Protection,Urban Rural Water Environment Governance and Low-carbon Development Engineering Technology Center of Jiangsu Province,Nanjing,Jiangsu 210036,China)

机构地区：[1]江苏开放大学环境生态学院,江苏南京210036 [2]南京林业大学风景园林学院,江苏南京210037 [3]江苏省生态环境保护城乡水环境治理低碳发展工程技术中心,江苏南京210036

出　　处：《水土保持通报》2024年第5期262-270,共9页Bulletin of Soil and Water Conservation

基　　金：国家自然科学基金项目“基于大数据的城市道路绿化景观再设计的理论与方法研究:以南京为例”(31770752);江苏省高校自然科学资助项目“珍贵水生花卉香水莲花花色形成机理与应用研究”(20KJB220006);江苏省高校哲学社会科学研究项目(2023SJYB0781);江苏省自然科学基金项目(BK20240218)。

摘　　要：[目的]探索不同植被类型湿地土壤CO_(2)产生潜力对温度变化的响应规律,为精确估算CO_(2)产生和温室气体排放提供依据。[方法]针对3种不同植被类型湿地土壤(荷花、芦苇、开放水面),进行120 d的室内模拟培养试验,分别设置15,25,35℃处理,观察不同植被类型湿地土壤产CO_(2)潜力的差异及其对温度变化的响应。[结果]东太湖不同植被类型湿地土壤CO_(2)产生速率在35℃培养下最快。35℃培养条件下芦苇、开放水面CO_(2)产生速率随DOC增加而增加,其余均呈负相关关系。荷花、芦苇土壤最大产CO_(2)潜力表现为35℃>15℃>25℃,开放水面表现为:15℃>25℃>35℃。荷花、芦苇湿地产CO_(2)潜力与培养温度呈正相关,开放水面呈显著负相关关系。比较温度敏感系数Q_(10)值发现,只有荷花土壤的升温Q_(10)值大于降温Q_(10)值。[结论]高温能加快不同植被类型湿地土壤CO_(2)产生速率、加剧DOC变化。比较同温度、不同植被土壤产CO_(2)潜力发现,芦苇、开放水面对降温更敏感。湿地植物及其土壤对温室气体的产生受外界温度影响较大,在未来城市水生态管理中应予以更多的关注。[Objective]Soil CO_(2)production potential of different vegetation types in response to temperature change was analyzed in order to provide the basis for accurate estimation of CO_(2)production and greenhouse gas emissions.[Methods]A simulated culture experiment was conducted for 120 days for three different types of wetland soil(Nelumbo nucifera,Phragmites australis and open water),and the treatment was set at 15,25,and 35℃to observe the difference in the CO_(2)production potential of the wetland soil of different vegetation types and evaluate their response to temperature change.[Results]The fastest soil CO_(2)production rate among the different vegetation types in East Taihu Lake was recorded in the 35℃culture treatment.Under the culture temperature of 35℃,the CO_(2)production rate of P.australis and open water surface increased with an increase in dissolved organic carbon(DOC)but that of the rest were negatively correlated.The maximum CO_(2)production potential of N.nucifera and P.australis soil was in the order as follows:35℃>15℃>25℃and that of open water surface was 15℃>25℃>35℃.The CO_(2)production potential of N.nucifera and P.australis wetlands was positively correlated with culture temperature,whereas that of the open water surface was significantly negatively correlated.Comparising all of the temperature sensitivity coefficient Q_(10)values,it was found that only N.nucifera soil temperature rise Q_(10)>temperature drop Q_(10).[Conclusion]High temperature can accelerate CO_(2)production rate and increase DOC change in different vegetation types.Regarding the CO_(2)production potential of soil with the same temperature and different vegetation,it was found that P.australis and open water surface were more sensitive to cooling.The greenhouse gas production of wetland plants and the soil was greatly affected by external temperature;therefore,more attention should be paid to future urban water ecological management.

关 键 词：太湖 湿地 植被 CO_(2)产生潜力 温度 

分 类 号：S154.4[农业科学—土壤学]