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应用生态学报 ›› 2022, Vol. 33 ›› Issue (2): 304-310.doi: 10.13287/j.1001-9332.202202.007

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长白山阔叶红松林5种主要树种水分利用效率与叶片养分特征

田金园1,2, 袁凤辉1, 关德新1, 吴家兵1, 王安志1*   

  1. 1中国科学院沈阳应用生态研究所, 中国科学院森林生态与管理重点实验室, 沈阳 110016;
    2中国科学院大学, 北京 100049
  • 收稿日期:2021-05-17 修回日期:2021-08-25 出版日期:2022-02-15 发布日期:2022-08-15
  • 通讯作者: *E-mail: waz@iae.ac.cn
  • 作者简介:田金园, 女, 1995年生, 硕士研究生. 主要从事水文生态学研究。E-mail: tianjinyuan9523@163.com
  • 基金资助:
    国家自然科学基金项目(31770755,31971728)资助。

Water use efficiency and leaf nutrient characteristics of five major tree species in broadleaved Korean pine forest in Changbai Mountains, China

TIAN Jin-yuan1,2, YUAN Feng-hui1, GUAN De-xin1, WU Jia-bing1, WANG An-zhi1*   

  1. 1CAS Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China;
    2University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2021-05-17 Revised:2021-08-25 Online:2022-02-15 Published:2022-08-15

摘要: 以长白山阔叶红松林中5种优势树种(红松、水曲柳、色木槭、蒙古栎、紫椴)为研究对象,利用稳定碳同位素技术分析了植物的水分利用效率(WUE),测定了叶片碳(C)、氮(N)、磷(P)3种营养元素的含量用以分析植物对养分的利用特征,并综合分析了植物WUE与叶片养分含量之间的关系。结果表明: 冠层不同位置微气象因子的差异导致WUE存在差异,4个阔叶树种的WUE表现为上层>中层>下层,红松的WUE表现为上层>下层>中层。树种间WUE的差异表现为常绿针叶树种红松的WUE大于两个散孔材阔叶树种(紫椴和色木槭),小于两个环孔材阔叶树种(水曲柳和蒙古栎),复叶树种水曲柳具有最高的WUE,红松当年生新叶显著高于老叶。常绿针叶树种红松当年生新叶及老叶的碳含量、C/N均显著高于其他4个阔叶树种,氮含量和N/P显著低于4个阔叶树种,红松老叶的磷含量显著低于4个阔叶树种,当年生新叶的磷含量与阔叶树种差异不显著。5个树种WUE与叶片C含量的相关性较差,与叶片N含量均呈正相关,常绿针叶树种和落叶阔叶树种的WUE与叶片P含量之间的相关性相反。

关键词: 阔叶红松林, 稳定碳同位素, 水分利用效率, 叶片养分

Abstract: Water use efficiency (WUE) of five dominant tree species (Pinus koraiensis, Fraxinus mandshurica, Acer mono, Quercus mongolica, and Tilia amurensis) was estimated using the stable carbon isotope method in a broadleaved Korean pine forest in Changbai Mountains. Leaf carbon (C), nitrogen (N), and phosphorus (P) contents were measured to analyze nutrient utilization of the dominant species. The relationship between WUE and leaf nutrient contents was systematically assessed. WUE was different due to the variations of micrometeorological factors at different locations in the canopy. The four broadleaved tree species showed upper layer > middle layer > lower layer, while P. koraiensis showed upper layer > lower layer > middle layer. WUE of evergreen coniferous P. koraiensis was higher than that of two broadleaved species with diffuse-porous wood (T. amurensis and A. mono) and lower than that of two broadleaved species with ring-porous wood (F. mandshurica and Q. mongolica). The compound-leaved species (F. mandshurica) had the highest WUE. The WUE of new leaves was significantly higher than old leaves in P. koraiensis. The carbon content and C/N of the old and new leaves of evergreen coniferous P. koraiensis were significantly higher than those of the other four broadleaved tree species, while nitrogen content and N/P were significantly lower than those of the four broadleaved tree species. P content of old leaves of P. koraiensis was significantly lower than that of the four broadleaved tree species. P content of new leaves of current year was not significantly different from that of the broadleaved tree species. The WUE of five tree species had a poor correlation with leaf C content, but a positive correlation with leaf N content. The WUE of evergreen coniferous and deciduous broadleaved tree species was correlated with leaf P content but in opposite direction.

Key words: broadleaved Korean pine forest, stable carbon isotope, water use efficiency, leaf nutrient