文献类型：期刊文献

中文题名：安庆杨树林生态系统碳通量及其影响因子研究

英文题名：Research on the Variation of Carbon Flux and the Relationship of Environmental Factors and Carbon Flux of Populus Forest Ecosystem in the Reaches of Yangtze River in Anqing

作者：彭镇华[1] 王妍[2] 任海青[2] 孙启祥[1] 周金星[1]

第一作者：彭镇华

机构：[1]中国林业科学研究院林业研究所,北京100091;[2]中国林业科学研究院木材工业研究所,北京100091

年份：2009

卷号：22

期号：2

起止页码：237-242

中文期刊名：林业科学研究

外文期刊名：Forest Research

收录：CSTPCD;;Scopus;北大核心:【北大核心2008】；CSCD:【CSCD2011_2012】；

基金：国家林业局948项目(2006-4-16);推广项目:长江流域低山丘陵治理材料高附加值利用技术示范[2007]-91

语种：中文

中文关键词：碳通量;杨树林;环境因子;响应关系

外文关键词：carbon flux ; Populus forest; environmental factors ; responsive relationship

分类号：S722.3

摘要：以安徽安庆长江外滩地杨树林生态系统为研究对象,运用涡度相关技术进行长期CO2通量监测,得到2005年4月到2006年3月间生态系统碳通量的日动态变化过程:从7:30左右生态系统开始吸收CO2,午间13:30左右达到全天碳吸收最高峰,然后开始降低,到17:30左右生态系统逐渐转入碳排放;同时分析了生态系统碳通量与光合有效辐射(PAR)、温度、土壤热通量等环境因子的响应变化关系:PAR>1μmol.m-2.s-1时,在不同温度范围内,PAR与碳通量的响应关系不同;平均夜间碳通量与月平均气温呈线性相关;平均夜间碳通量与5 cm处土壤日平均温度呈指数相关;月平均碳通量与2 cm深处土壤热通量也呈指数相关。
The research chose the Populus forest ecosystem in the reaches of Yangtze River in Anqing, Anhui province as research object, and monitored the CO2, H2O, temperature, moisture, PAR, and so on by eddy- covariance. The data of regulated change and process of diurnal carbon flux of forest ecosystem were obtained. In daytime, the ecosystem began to absorb CO2 at about 7：30 am, and reached to the Max. at about 13：30, then went down slowly, and at about 17：30, the ecosystem began to release CO2. The value of carbon sink or source varied owing to different season and forest ecosystem. The paper also analyzed the relationships of carbon flux of forest ecosystem and environmental factors. The results are as follows ： （ 1 ） When the PAR 〉 1 μmol·m^-2·s^-1, the relationship of carbon flux and PAR was different in different range of temperature. （2） Average air temperature and carbon flux at night had linear relationship, namely when the air temperature arose, the carbon flux at night augmented. The night-time C02 flux and soil temperature in 5 cm depth had exponential correlation. （3） The monthly average carbon flux of night-time and soil heat flux in 2 cm depth had the relationship of exponential correlation.