干旱区生态环境知识资源中心(Arid): 准噶尔盆地荒漠区短命植物光合蒸腾特性及影响因素研究

Arid

	准噶尔盆地荒漠区短命植物光合蒸腾特性及影响因素研究
其他题名	Photosynthetic and Transpiration Characteristics and Their Affecting Factors of Ephemeral Plant in the Desert Area of the Junggar Basin
	李薇; 唐海萍
ISSN	1000-4025
出版年	2006
卷号	26 期号:12 页码:2517-2522
中文摘要	运用LI-6400便携式光合测定系统,研究了准噶尔盆地荒漠区2种典型短命植物--狭果鹤虱(Lappula semiglabra)和四齿芥(Tetracme quadricornis)的净光合速率、蒸腾速率和水分利用效率特征.结果表明:狭果鹤虱和四齿芥的光合能力分别为44.92、34.57 mumol·m~(-2)·s~(-1);狭果鹤虱和四齿芥的净光合速率日均值分别为29.72、23.0 mumol·m~(-2)·s~(-1),蒸腾速率日均值分别17.23、12.84 mmol·m~(-2)·s~(-1),狭果鹤虱均高于四齿芥,属于高光合、高蒸腾类型;二者的净光合速率和水分利用效率日变化均呈双峰曲线,而蒸腾速率日变化呈单峰曲线;二者的光合"午休"现象主要是由气孔因素引起的;通过对2种植物光合和蒸腾速率与环境因子的相关分析显示,辐射强度是影响2种植物光合速率最主要的环境因子
英文摘要	With LI-6400 portable photosynthetic system the net photosynthetic rates, transpiration rates and water use efficiencies of two ephemeral plants, Lappula semiglabra and Tetracme quadricornis in the Desert Area of the Junggar Basin, were studied. It was shown that the photosynthetic capacities of Lappula semiglabra and Tetracme quadricornis were separately 44.92 mumol·m~(-2)·s~(-1) and 34.57 mumol·m~(-2)·s~(-1); the net photosynthetic rates of the two plants were separately 29.72 mumol·m~(-2)·s~(-1) and 23.0 mumol·m~(-2)·s~(-1) and the transpiration rates of the two plants weret-separately 17.23 mmol·m~(-2)·s~(-1) and 12.84 mmol·m~(-2)·s~(-1); Lappula semiglabra had a higher photosynthetic rate and a higher transpiration rate than Tetracme quadricornis did, so that it belonged to the type of plants with high photosynthetic rate and high transpiration rate; the two plants presented the net photosynthetic rates and the water use efficiencies that appeared to vary in a single-peak curve and the transpiration rate that appeared to vary in a double-peak curve, in the two plants, the midday depression in transpiration mainly resulted from stomatal factors; the analysis of the correlation between the photosynthetic rates and transpiration rates of the two plants in-dicated that radiation intensity was the most important environmental factor affecting the photosyntheticrates of the two plants.
中文关键词	短命植物 ; 光合速率 ; 蒸腾速率 ; 日变化 ; 准噶尔盆地
英文关键词	ephemeral plant photosynthetic rate transpiration rate diurnal variation the Junggar Basin
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:2656672
来源机构	北京师范大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/220292
作者单位	北京师范大学资源学院, 环境演变与自然灾害教育部重点实验室, 北京 100875, 中国
推荐引用方式 GB/T 7714	李薇,唐海萍. 准噶尔盆地荒漠区短命植物光合蒸腾特性及影响因素研究[J]. 北京师范大学,2006,26(12):2517-2522.
APA	李薇,&唐海萍.(2006).准噶尔盆地荒漠区短命植物光合蒸腾特性及影响因素研究.,26(12),2517-2522.
MLA	李薇,et al."准噶尔盆地荒漠区短命植物光合蒸腾特性及影响因素研究".26.12(2006):2517-2522.

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