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应用生态学报 ›› 2019, Vol. 30 ›› Issue (5): 1479-1486.doi: 10.13287/j.1001-9332.201905.021

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邻域竞争对长白山阔叶红松林关键树种生长的影响

唐杨1,2, 童跃伟1,2, 韩艳刚1,2, 周旺明1, 周莉1, 代力民1, 于大炮1*   

  1. 1中国科学院沈阳应用生态研究所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:2019-01-29 修回日期:2019-01-29 出版日期:2019-05-15 发布日期:2019-05-15
  • 通讯作者: E-mail: yudp2003@iae.ac.cn
  • 作者简介:唐 杨,男,1991年生,硕士研究生.主要从事森林生态学与森林生态系统管理方面的研究.E-mail: tangy110@126.com
  • 基金资助:
    国家自然科学基金项目(41877549,41371124)和科技基础性工作专项专题(2015FY210200-9)

Effect of neighborhood competition on key tree species growth in broadleaved-Korean pine mixed forest in Changbai Mountain, China.

TANG Yang1,2, TONG Yue-wei1,2, HAN Yan-gang1,2, ZHOU Wang-ming1, ZHOU Li1, DAI Li-min1, YU Da-pao1*   

  1. 1Chinese Academy of Sciences 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:2019-01-29 Revised:2019-01-29 Online:2019-05-15 Published:2019-05-15
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (41877549, 41371124) and the Science and Technology Basic Work of Science and Technology (2015FY210200-9).

摘要: 林木间的竞争是影响树木生长、形态和死亡的主要因素.单木邻域竞争分析能够反映个体间相互作用规律及其距离范围,对于减缓林木竞争、促进林木生长具有重要意义.为弄清竞争对阔叶红松林林木生长的影响,本研究基于Hegyi单木竞争指数和邻域分析方法,探讨了长白山原始阔叶红松林中的5个关键树种——红松、紫椴、水曲柳、蒙古栎和春榆(胸高断面积合计占80%)竞争的邻域半径,并分析了竞争对关键树种生长和死亡的影响.结果表明:红松、紫椴、水曲柳和蒙古栎4个树种单木竞争的邻域半径均为11 m,春榆为13 m.关键树种单木邻域竞争强度与其生长量的对数呈显著负相关,与树木个体的大小呈显著正相关;竞争强度对树木生长影响的相对重要性随着个体的生长而降低.邻域竞争显著增加了关键树种的死亡率.本研究表明长白山阔叶红松林中邻域竞争对关键树种的生长和存活有重要影响,研究结果对阔叶红松林关键树种竞争环境的调整和生产力的提升具有指导意义.

关键词: 森林经营, 生长, 死亡, 阔叶红松林, 邻域竞争

Abstract: Competition is the main factor affecting the growth, morphology and death of trees in fore-sts. The analysis of individual competition can reflect the characteristics of interaction among individuals and their interaction ranges, which is important for reducing individual competition and promoting tree growth. To understand the effects of competition on tree growth in broad-leaved Korean pine forest, based on Hegyi single-tree competition index and neighborhood analysis method, we explored the neighborhood radius of competition for five key tree species, i.e. Pinus koraiensis, Tilia amurensis, Fraxinus mandshurica, Quercus mongolica and Ulmus japonica (80% of basal area at breast height in total), and analyzed the effects of competition on the growth and death of the key tree species. The results showed that the neighborhood radius of single-tree competition of four tree species, P. koraiensis, T. amurensis, F. mandshurica and Q. mongolica was 11 m, while that of U. pumila was 13 m. The single-tree competition intensity for all five key tree species was negatively correlated with the logarithm of its growth increment, and positively correlated with the size of individual trees. The relative importance of competition intensity on tree growth decreased with tree growth. Neighborhood competition significantly increased tree mortality. Our results revealed the effects of neighborhood competition on the growth and survival of the key tree species at different developmental stages in broad-leaved Korean pine forests in Changbai Mountain. The results are instructive to the adjustment of competitive environment and the improvement of productivity of key tree species in broad-leaved Korean pine forests.

Key words: forest management, growth, mortality, broadleaved-Korean pine mixed forest., neighborhood competition