干旱区生态环境知识资源中心(Arid): CO_2浓度升高对极端干旱区多枝柽柳叶片水分利用效率的影响

Arid

	CO_2浓度升高对极端干旱区多枝柽柳叶片水分利用效率的影响
其他题名	Responses of water use efficiency of Tamarix ramosissima Ledeb leaf to elevated CO_2 concentration
	常宗强 1; 冯起1 ; 张秀凤 2; 苏永红 1; 司建华1 ; 席海洋 1; 曹生奎 1
来源期刊	干旱区地理
ISSN	1000-6060
出版年	2011
卷号	34 期号:3 页码:499-504
中文摘要	采用美国Li-COR公司生产的LI-6400便携式光合作用测量系统，在2008和2009年生长季节对极端干旱区额济纳绿洲多枝柽柳(Tamarix ramosissima Ledeb．)叶片的净光合速率(P_n)与蒸腾速率(T_r)、胞间CO_2浓度(C_t)随光照强度的变化。结果表明:胞间CO_2浓度(C_i)随光照强度增强而减小；净光合速率(P_n)与蒸腾速率(T_r)均随光照强度增强而增大。在达到光饱和点后净光合速率(P_n)随光照强度增强而逐渐减小；水分利用效率(WUE)随光照强度增强呈先增大，达到最大值后又逐渐减小。蒸腾速率(T_r)和胞间CO_2浓度(C_i)随CO_2浓度升高而增大；净光合速率 (P_n和水分利用效率(WUE在CO_2浓度为200～600mumoL/mol时随CO_2浓度升高而增大，当CO_2浓度升高至1 000mumoL/mol时，水分利用效率(WUE)先增大后减小。
英文摘要	Interactive effects of elevated atmospheric CO_2 concentration and water use efficiency (WUE)on terrestrial ecosystems play an important role in global carbon cycling.A large number of studies have been carried out on the relationship’between the dynamics of elevated atmospheric CO_2 concentration and related factors,but few studies have been done in these areas.Therefore,our objective is to conduct an experiment to improve our understanding with elevated atmospheric CO_2 concentration and the characteristics of water use efficiency about Tamarix ramosissima Ledeb in extreme arid region.on early May to late November 2008 and 2009,the branches were put at the same height,and the changes of the net photosynthesis rate (P_n),transpiration rate (T_r),intercellular CO2 concentration (C_i)of Tamarix ramosissima Ledeb leaf with light intensity were measured under different CO2 concentration with a LiCor 6400 Portable Photosynthesis System; the response to CO_2 enrichment was also compared.The results show that with enhanced light intensity,intercellular CO2 concentration (C_i)decreases; net photosynthesis rate (P_n)and transpiration rate (T_r)increase first,then gradually decrease after leaf get to light saturation point; water use efficiency (WUE)also increases first,but it gradually decreases after it reaches max value.With elevated CO2 concentration,transpiration rate (T_r)and intercellular CO_2 concentration (C_i)increasing,net photosynthesis rate (P_n)and water use efficiency (WUE)increase when CO_2 concentration elevates from 200 to 600 mumol/mol,and when CO_2 concentration elevates to 1 000 mumol/mol,water use efficiency (WUE)increases first and then gradually decreases.The study results would do great help in the evaportranspiration modeling of terrestrial ecosystem carbon and water balance about Tamarix ramosissima in extreme arid region.
中文关键词	柽柳 ; 蒸腾特性 ; 水分利用效率 ; CO_2浓度
英文关键词	Tamarix ramosissima Ledeb. transpiration characteristic water use efficiency CO_2 concentration
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:4219580
来源机构	中国科学院西北生态环境资源研究院
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/226461
作者单位	1.中国科学院寒区旱区环境与工程研究所,寒旱区流域水文及应用生态实验室, 兰州, 甘肃 730000, 中国; 2.内蒙古阿拉善右旗雅布赖治沙站, 右旗, 内蒙古 737300, 中国
推荐引用方式 GB/T 7714	常宗强,冯起,张秀凤,等. CO_2浓度升高对极端干旱区多枝柽柳叶片水分利用效率的影响[J]. 中国科学院西北生态环境资源研究院,2011,34(3):499-504.
APA	常宗强.,冯起.,张秀凤.,苏永红.,司建华.,...&曹生奎.(2011).CO_2浓度升高对极端干旱区多枝柽柳叶片水分利用效率的影响.干旱区地理,34(3),499-504.
MLA	常宗强,et al."CO_2浓度升高对极端干旱区多枝柽柳叶片水分利用效率的影响".干旱区地理 34.3(2011):499-504.