干旱区生态环境知识资源中心(Arid): 梭梭与白梭梭气体交换特征对比分析

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	梭梭与白梭梭气体交换特征对比分析
其他题名	Gas Exchange of Haloxylon ammodendron and H. persicum
	田媛 1; 塔西甫拉提·特依拜 2; 徐贵青 3
来源期刊	干旱区研究
ISSN	1001-4675
出版年	2014
卷号	31 期号:3 页码:542-549
中文摘要	梭梭(Haloxylon ammodendron)与白梭梭(H. persicum)是古尔班通古特沙漠植物群落2个最主要的建群种。通过对梭梭与白梭梭光合特性及相关环境因子的同期观测,探讨其光合响应特征及其与环境因子关系的异同。结果表明: 梭梭对弱光的利用能力大于白梭梭,而白梭梭利用强光的能力大于梭梭。梭梭和白梭梭净光合速率(P_n) 、气孔导度(G_s) 、蒸腾速率(T_r)的日变化特征均为单峰型,但P_n、G_s峰值出现时间略有差异,T_r的峰值出现时间为16: 00。根据梭梭和白梭梭P_n、胞间CO_2浓度(C_i)及气孔限制值(L_s)的变化方向,推测梭梭光合午休主要由气孔因素引起。白梭梭日平均P_n、T_r和WUE(水分利用效率)均高于梭梭,说明白梭梭是一种高光合、高蒸腾、高水分利用效率的物种。相关分析表明,对梭梭、白梭梭的Pn影响最显著的环境因子是光量子通量密度(PPFD) 。
英文摘要	Haloxylon ammodendron and H. persicum are two main edificators in the Gurbantonggut Desert,Xinjiang. Based on the simultaneous observations of photosynthetic characteristics and related environmental factors affecting the growth of H. ammodendron and H. persicum,different photosynthetic responses of the two species to environmental factors were studied. Results showed that H. ammodendron was better in using lowlight than H. persicum, but it was contrary in using highlight. The curves of daily variation of net photosynthetic rate,stomatal conductance and transpiration rate were all unimodal,the time of occurring the peak values of net photosynthetic rate and stomatal conductance was slightly different,and the peak value of transpiration rate occurred always at 16: 00. According to the variation of photosynthetic rate,intercellular CO_2concentration and stomatal limitation of H. ammodendron and H. persicum,it was considered that themidday depressionof photosynthesis was mainly caused by stomatal factors. The daily averages of photosynthetic rate,transpiration rate and water use efficiency of H. persicum were higher than those of H. ammodendron. Correlation analysis revealed that the photon flux density was the most significant environmental factor affecting the photosynthetic rate of H. ammodendron and H. persicum.
中文关键词	梭梭(Haloxylon ammodendron) ; 白梭梭(H. persicum) ; 光合作用 ; 气体交换 ; 环境因子 ; 古尔班通古特沙漠
英文关键词	Haloxylon ammodendron Haloxylon persicum photosynthesis gas exchange environmental factor Gurbantonggut Desert
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:5141974
来源机构	中国科学院新疆生态与地理研究所 ; 新疆大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/231168
作者单位	1.新疆大学资源与环境科学学院, 荒漠与绿洲生态国家重点试验室, 乌鲁木齐, 新疆 830046, 中国; 2.新疆大学资源与环境科学学院, 绿洲生态教育部重点实验室, 乌鲁木齐, 新疆 830046, 中国; 3.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试验室, 乌鲁木齐, 新疆 830011, 中国
推荐引用方式 GB/T 7714	田媛,塔西甫拉提·特依拜,徐贵青. 梭梭与白梭梭气体交换特征对比分析[J]. 中国科学院新疆生态与地理研究所, 新疆大学,2014,31(3):542-549.
APA	田媛,塔西甫拉提·特依拜,&徐贵青.(2014).梭梭与白梭梭气体交换特征对比分析.干旱区研究,31(3),542-549.
MLA	田媛,et al."梭梭与白梭梭气体交换特征对比分析".干旱区研究 31.3(2014):542-549.