次生栎林生态系统碳通量与环境因子非对称响应机制  

Response mechanism between carbon flux and asymmetrical environmental factors in secondary oak forest ecosystem

作　　者：李超[1] 胡海波[1] 

机构地区：[1]南京林业大学森林资源与环境学院,江苏南京210037

出　　处：《中南林业科技大学学报》2012年第9期94-101,共8页Journal of Central South University of Forestry & Technology

基　　金：国家林业局重点项目"长江三角洲城市森林生态系统定位研究"(2001-5);国家科技支撑项目"长江三角洲城市森林生态站及其所在省区森林生态质量状况评估技术"(2006BAD03A0702/wb01)

摘　　要：为了研究栎林生态系统碳通量与环境因子之间的响应机制,预测未来全球气候变化趋势,运用涡度相关法技术,对江苏省下蜀镇栎林进行为期1年的碳通量及气象因子观测。结果表明:碳通量与光合有效辐射呈现出显著的负对数相关关系,对称时间段的拟合度在各季节均优于非对称时间段;碳通量与气温呈显著的负对数相关关系,对称时间段拟合效果优于非对称时间段;碳通量与土壤温度呈显著的正对数相关关系,非对称时间段碳通量与土温的拟合效果在各季节均均优于对称时间段。In order to study the response mechanism between carbon flux and environmental factors in oak forest ecosystem,the future global climate change trends have been predicted.By using eddy covariance method,the carbon flux and meteorological factors in oak forest ecosystem in Zhenjiang city,Jiangsu province were monitored for one year.The results show that there was a significant negative logarithm correlation between the carbon flux and photosynthetically active radiation,the fitting degree of the symmetric time segment？was superior to that of asymmetric time segment;there was a remarkable negative logarithm correlation？between carbon flux and air temperature,the fitting effects between the asymmetric time segment＇s carbon flux and soil temperature were superior to those of the symmetric time segment？in every season.

关 键 词：次生栎林 涡度相关法 碳通量 环境因子 响应机制 

分 类 号：S718.5[农业科学—林学]