中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
立地条件和树龄对刺槐叶形态及生理特性的影响

文献类型:期刊论文

作者李俊辉 ; 李秧秧
刊名水土保持研究
出版日期2012
卷号19期号:04页码:176-181
关键词立地条件 ite 树龄 tree age 刺槐 Robinia pseudoacacia 叶形态与生理特性 leaf morph-physiological traits
其他题名Effects of Site and Tree Age on Leaf Morpho-physiological Traits of Black Locust
中文摘要立地条件和树龄是影响黄土高原刺槐"小老树"形成的主要因素。为此,该文研究了不同立地条件下(水分条件好的沟谷台地和水分条件相对差的峁坡坡地)刺槐叶形态和生理特性随树龄的变化,目的在于揭示"小老树"形成的生理机制。结果表明:坡地刺槐具有小的叶面积,高的比叶质量和叶厚度,低的比叶水力导度、净光合速率和气孔导度,而水分利用效率和N、P养分含量均较高。随树龄增加,刺槐的叶形态和生理特性表现出干旱生境中的特点,叶水分关系的恶化和分配到光合器官中的N含量比例的减少是随树龄增加净光合速率降低的重要原因。立地条件和树龄对大多数叶形态和生理特性表现出显著的交互作用,表明干旱与树龄增加相互作用导致的光合面积的减少、叶片结构和建造成本的上升及净光合速率的下降是黄土高原"小老树"形成的重要原因。
英文摘要Site and tree age are the major factors resulting in the development of small dwarf tree on the Loess
Plateau.Thus,this paper studied changes of leaf morpho-physiological traits of black lotcust(Robinia
pseudoacacia)with dynamic of tree age under two sites(gully tableland with sufficient water supply and inter-
gully slopeland with limited water supply)in order to examine the physiological mechanism of formation
of small dwarf tree.The results indicated that black locust growing on the slopeland had smaller leaf area,
higher specific leaf mass and leaf thickness,lower whole-tree hydraulic conductance,decreased net photosynthetic
 rate and stomatal conductance,increased water use efficiency and N,P nutrient content.Changes of
leaf morpho-physiological traits of black lotcust with tree age showed the same trend as in drought habitat.
Worse leaf water status and decreased proportion of N in photosynthetic organ contributed to the decrease of
photosynthetic rate in old-aged trees.Site and tree age showed significant interaction for most leaf traits,indicating
 decreased photosynthetic area,raised leaf construction cost and lower net photosynthetic rate were
major reasons responsible for forming small dwarf tree on the Loess Plateau.
语种中文
公开日期2014-06-30
源URL[http://ir.iswc.ac.cn/handle/361005/5370]  
专题水土保持研究所_水保所知识产出(1956-2013)
推荐引用方式
GB/T 7714
李俊辉,李秧秧. 立地条件和树龄对刺槐叶形态及生理特性的影响[J]. 水土保持研究,2012,19(04):176-181.
APA 李俊辉,&李秧秧.(2012).立地条件和树龄对刺槐叶形态及生理特性的影响.水土保持研究,19(04),176-181.
MLA 李俊辉,et al."立地条件和树龄对刺槐叶形态及生理特性的影响".水土保持研究 19.04(2012):176-181.

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来源:水土保持研究所

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