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Arid

	不同生境梭梭对降水变化的生理响应及形态调节
其他题名	Physiological Response and Morphological Adjustment of Haloxylon ammodendron in Different Habitats against Precipitation Variation
	邹婷; 李彦; 许皓; 徐贵青
来源期刊	中国沙漠
ISSN	1000-694X
出版年	2011
卷号	31 期号:2 页码:428-435
中文摘要	以中亚荒漠关键种梭梭为研究对象,对比2006年生长季土壤水分状况和生长在沙土及黏土中梭梭对3个降水处理的生理响应与同化枝面积的累积变化,分析不同质地土壤生长的梭梭在生长季对降水变化的生理响应及其形态调节.结果表明,沙土中生长梭梭对降水响应明显,生长季同化枝水势较高,且不同降水处理下蒸腾速率和瞬时水分利用效率差异显著,同化枝形态调节幅度不大.黏土不利于降水入渗,梭梭同化枝水势、蒸腾速率和瞬时水分利用效率对降水变化的响应不敏感,同化枝面积和生长速率在不同降水处理间差异显著,同化枝脱落较早.生理响应与形态调节的综合研究表明,不同质地土壤生长的梭梭通过有效的同化枝形态调节保证了其在降水处理下稳定的光合碳同化作用.在全球气候变化的背景下,沙土更有利于梭梭的生长
英文摘要	Haloxylon ammodendron,a native dominant desert shrub,was chosen as the study object,and the variation of soil moisture content,plant physiological response and branch biomass change in sandy soil and heavy textured soil under three precipitation treatments(no,natural and double precipitation,respectively) were monitored during the growing season in 2006. The similarity and difference of physiological response and morphological adjustment of H.ammoddendron to precipitation treatme nt were analyzed. The results indicated that the branch water’ potential,transpiration and photosynthetic water-use efficiency of H. ammodendron in sandy soil differed significantly under three precipitation treatments,but these parameters of H. armmodendron in heavy-textured soil did not appear a high sensitivity to precipitation variation. Under the three precipitation treatments,the branch growth rate of H. ammodendron differed significantly in heavy textured soil,but not in sandy soil. The integrated analysis of physiological response and morphological adjustment indicated that biomass allocation,or morphological acclimation at individual plant scale maintained photosynthetic stability and the survival of H. ammodendron in different textured soils under different precipitation treatments. H. ammodendron in sandy soil will be favored over those in heavy-textured soil in the natural background of climatic change
中文关键词	梭梭 ; 光合作用 ; 形态调节 ; 气候变化 ; 降水
英文关键词	Haloxylon ammodendron photosynthesis morphological adjustment climate change precipitation
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:4157940
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/2XILL650/227499
作者单位	中国科学院新疆生态与地理研究所阜康荒漠生态站, 乌鲁木齐, 新疆 830011, 中国
推荐引用方式 GB/T 7714	邹婷,李彦,许皓,等. 不同生境梭梭对降水变化的生理响应及形态调节[J]. 中国科学院新疆生态与地理研究所,2011,31(2):428-435.
APA	邹婷,李彦,许皓,&徐贵青.(2011).不同生境梭梭对降水变化的生理响应及形态调节.中国沙漠,31(2),428-435.
MLA	邹婷,et al."不同生境梭梭对降水变化的生理响应及形态调节".中国沙漠 31.2(2011):428-435.