干旱区生态环境知识资源中心(Arid): 塔里木河下游胡杨群落CO

Arid

	塔里木河下游胡杨群落CO_2通量特征与水分利用效率
其他题名	CO_2 flux characteristics and water use efficiency of the Populus euphratica community in the lower reaches of Tarim River
	美尔汗·黑扎特 1; 郝兴明 2
来源期刊	生态学报
ISSN	1000-0933
出版年	2018
卷号	38 期号:6 页码:2048-2055
中文摘要	以极端干旱环境中的胡杨群落为研究对象,利用涡度相关通量观测系统,研究了胡杨群落CO_2通量与水分利用效率在不同物候期的动态规律。结果表明:胡杨CO_2通量在不同物候期日变化趋势基本一致,但存在明显的季节差异,其中果熟期CO_2通量变化幅度最大,开花期最小,展叶期介于二者之间。相关分析表明,胡杨群落CO_2通量均与显热通量、潜热通量、动量通量、土壤热通量、净辐射以及空气相对湿度呈极显著相关。其中,净辐射、潜热通量和显热通量与CO_2通量的相关系数较大,其变化范围分别为-0.82-0.88、-0.64-0.66和-0.63-0.94,是影响群落CO_2通量的最主要环境因子。胡杨群落水分利用效率(WUE)同样存在明显日变化规律。其时间动态表现为:群落水分利用效率在开花期、叶黄期和落叶期变化幅度大,开花期最高,在展叶期和果熟期WUE最稳定。净辐射和风速是影响群落水分利用效率的两个最关键要素。
英文摘要	Made the Populus euphratica communities as the research object in the extreme drought environment the CO_2 flux characteristics and water use efficiency(WUE)during different phenological phases of P. euphratica were studied using the eddy covariance flux observation system. The results showed that the daily variations in the CO_2 flux trends were basically identical in different phenological phases of P. euphratica,but there were obvious seasonal differences. The change amplitude ofchange in CO_2 flux rate at the maturity stage was the largest,and was the smallest at the flowering stage,and medium at the foliation stage. Correlation analysis showed that the CO_2 flux rate of P. euphratica community was significantly correlated with the sensible heat flux,latent heat flux,momentum flux,soil heat flux,net radiation and relative humidity of the air. Among them,net radiation,and latent and sensible heat fluxes were more highly related with the CO_2 fluxs,The scope of change,i. e,- 0.82- 0.88、- 0.64- 0.66 and - 0.63- 0.94,respectively,the main environmental factor affecting the CO_2 rate of the community. Thus this study shoued an obvios daily change in water use efficiency of the P. euphratica community. The dynamic performance of WUE of the community time was as follows:water use efficiency varied greatly at the flowering stage,leaf coloration stage,and defoliation stage,and was the highest at the flowering stage, most stable at the foliation and maturity stages. Two of the most critical factors affecting the communities were net radiation and wind speed.
中文关键词	干旱区 ; 胡杨 ; 二氧化碳通量 ; 气象因素 ; 水分利用效率
英文关键词	arid areas Populus euphratica CO_2 flux meteorological factors water use efficiency
语种	中文
国家	中国
收录类别	CSCD
WOS类目	PLANT SCIENCES
WOS研究方向	Plant Sciences
CSCD记录号	CSCD:6220768
来源机构	中国科学院新疆生态与地理研究所 ; 新疆师范大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/238112
作者单位	1.新疆师范大学生命科学学院;;中国科学院新疆生态与地理研究所, ;;荒漠与绿洲生态国家重点实验室, 乌鲁木齐;;乌鲁木齐, ;; 830054;;830011; 2.中国科学院新疆生态与地理研究所, 荒漠与绿洲生态国家重点实验室, 乌鲁木齐, 新疆 830011, 中国
推荐引用方式 GB/T 7714	美尔汗·黑扎特,郝兴明. 塔里木河下游胡杨群落CO_2通量特征与水分利用效率[J]. 中国科学院新疆生态与地理研究所, 新疆师范大学,2018,38(6):2048-2055.
APA	美尔汗·黑扎特,&郝兴明.(2018).塔里木河下游胡杨群落CO_2通量特征与水分利用效率.生态学报,38(6),2048-2055.
MLA	美尔汗·黑扎特,et al."塔里木河下游胡杨群落CO_2通量特征与水分利用效率".生态学报 38.6(2018):2048-2055.