森林与环境学报2025，Vol.45Issue(4)：413-422,10.DOI:10.13324/j.cnki.jfcf.202502020
塔里木河中游胡杨林生态系统碳通量与水分利用效率分析
Carbon flux and water use efficiency in a Populus euphratica forest ecosystem in the middle reaches of the Tarim River
摘要
Abstract
This study used eddy covariance and meteorological data to analyze the carbon flux and water use efficiency(WUE)in a Populus euphratica forest ecosystem in the middle reaches of the Tarim River during the growing season(March to October).Furthermore,the relationships of environmental factors with carbon flux and WUE were analyzed.The results showed that the P.euphratica forest ecosystem in the middle reaches of the Tarim River acted as a"carbon sink"during the growing season,with the cumulative totals of gross primary productivity(GPP),ecosystem respiration(ER),and net ecosystem productivity(NEP)being 845.74,527.92,and 317.82 g·m-2,respectively.The daily variation of net ecosystem exchange(NEE)during the growing season showed a"U"shape,and the carbon sink time of NEE reached 12 h in June.On the daily mean scale,both GPP and NEP showed positive correlations with photosynthetically active radiation(PAR)(P<0.001).Their correlations with air temperature(TA)gradually weakened as the monitoring height increased.In contrast,negative correlations with soil temperature(TS)were observed(P<0.001).ER was positively correlated with TA(P<0.001)but negatively correlated with soil water content(SWC)(P<0.001).The average WUE of the P.euphratica forest was 1.36 mg·g-1,with the evapotranspiration(ET)of approximately 630 mm.The WUE during the growing season showcased relatively stable daily variations,with higher values and greater fluctuations observed in March,April,May,and October than in June to September.ET,TA,and TS were identified as the main influencing factors of WUE.关键词
塔里木河/胡杨/河岸林/净生态系统碳交换量/总初级生产力/水分利用效率Key words
Tarim River/Populus euphratica/riparian forest/net ecosystem exchange(NEE)/gross primary productivity(GPP)/water use efficiency(WUE)分类
林学引用本文复制引用
刘甜,玉米提·哈力克,王新英,刘茂秀,马继龙,魏志成..塔里木河中游胡杨林生态系统碳通量与水分利用效率分析[J].森林与环境学报,2025,45(4):413-422,10.基金项目
新疆维吾尔自治区2024年林业发展补助资金项目"2024年新疆塔里木河胡杨林生态系统监测项目"(XJLYKJ-2024-27) （XJLYKJ-2024-27）
2024年新疆人才发展基金科研创新平台人才团队支持计划"轮台胡杨林生态系统新疆野外科学观测研究站" （）
国家自然科学基金项目"多重胁迫下胡杨林衰退及个体死亡驱动机制研究"(32260285). （32260285）
