干旱区生态环境知识资源中心(Arid): 塔克拉玛干沙漠南缘防护林和自然群落中多枝柽柳的光合特征及水分利用效率

Arid

	塔克拉玛干沙漠南缘防护林和自然群落中多枝柽柳的光合特征及水分利用效率
其他题名	Photosynthetic characteristics and water use efficiency of Tamarix ramosissima in shelterbelt and natural communities in south fringe of Taklamakan Desert,China
	邢鹏 1; 臧永新 1; 闵孝君 1; 巴贺贾依娜尔·铁木尔别克 1; 马剑英 2
来源期刊	应用生态学报
ISSN	1001-9332
出版年	2019
卷号	30 期号:3 页码:768-776
中文摘要	干旱区植物的生长和生存主要受水分限制,采用滴灌方式对防护林植物进行水分补给是维持人工生态屏障稳定性的重要手段.本研究通过测定塔克拉玛干沙漠南缘防护林和自然群落多枝柽柳的气体交换参数和稳定性碳同位素值,研究不同水分来源多枝柽柳的光合特征和水分利用效率.结果表明:滴灌群落多枝柽柳受灌溉和土壤盐分的影响水势普遍较低;自然群落多枝柽柳清晨和正午水势较其他植物低,表明其遭受到严重的水分胁迫;滴灌群落多枝柽柳叶片净光合速率(P_n) 、气孔导度(g_s) 、胞间CO_2浓度(C_i)和最大光合速率(P_(n max))均明显低于自然群落多枝柽柳,表明滴灌群落多枝柽柳光合能力弱于自然群落多枝柽柳;灌溉造成的盐分胁迫导致滴灌群落多枝柽柳比自然群落拥有较高的长期水分利用效率.总之,现行的灌溉模式虽能提供防护林植物生长所需水分,但技术的缺陷和土壤盐分的积累可能会影响防护林体系的长期稳定性.
英文摘要	The growth and reproduction of shelterbelt plants in arid regions is mainly limited by water availability,which can be alleviated by drip irrigation.We measured water use efficiency(WUE),leaf gas exchange and carbon isotope composition of Tamarix ramosissima in shelterbelt and natural communities in south fringe of Takelamakan Desert to investigate water use efficiency and photosynthetic properties of T.ramosissima differed in water sources.Compared to natural community,T.ramosissima in the drip irrigation community had low water potential due to irrigation and soil salinity.For natural community,T.ramosissima had lower predawn and midday water potential than other plants,indicating that T.ramosissima suffered serious water stress.The net photosynthetic rate (P_n),stomatal conductance (g_s),intercellular carbon dioxide concentration (C_i) and maximum photosynthesis rate (P_(n max)) of T.ramosissima in the drip irrigation community were significantly lower than that in the natural community,indicating the photosynthesis of T.ramosissima in the drip irrigation community was weaker.Compared to the natural community,T.ramosissima in the drip irrigation community had higher long-term water use efficiency,which was related to salt stress caused by irrigation.We concluded that the current irrigation model could meet the water needs of shelterbelt plants.However,the technical defects and soil salt accumulation might affect long-term stability of the shelterbelt community.
中文关键词	防护林 ; 自然群落 ; 水势 ; 光合特征 ; 水分利用效率
英文关键词	shelterbelt natural community water potential photosynthetic characteristic water use efficiency
语种	中文
国家	中国
收录类别	CSCD
WOS类目	ENVIRONMENTAL SCIENCES
WOS研究方向	Environmental Sciences & Ecology
CSCD记录号	CSCD:6450086
来源机构	中国科学院新疆生态与地理研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/239665
作者单位	1.中国科学院新疆生态与地理研究所;;中国科学院大学, 中国科学院干旱区生物地理与生物资源重点实验室;;, 乌鲁木齐;;, ;;北京 830011;;100049; 2.中国科学院新疆生态与地理研究所, 中国科学院干旱区生物地理与生物资源重点实验室, 乌鲁木齐, 新疆 830011, 中国
推荐引用方式 GB/T 7714	邢鹏,臧永新,闵孝君,等. 塔克拉玛干沙漠南缘防护林和自然群落中多枝柽柳的光合特征及水分利用效率[J]. 中国科学院新疆生态与地理研究所,2019,30(3):768-776.
APA	邢鹏,臧永新,闵孝君,巴贺贾依娜尔·铁木尔别克,&马剑英.(2019).塔克拉玛干沙漠南缘防护林和自然群落中多枝柽柳的光合特征及水分利用效率.应用生态学报,30(3),768-776.
MLA	邢鹏,et al."塔克拉玛干沙漠南缘防护林和自然群落中多枝柽柳的光合特征及水分利用效率".应用生态学报 30.3(2019):768-776.