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植物研究 ›› 2023, Vol. 43 ›› Issue (6): 857-867.doi: 10.7525/j.issn.1673-5102.2023.06.008

• 生理与生态 • 上一篇    下一篇

林龄对毛白杨功能性状和林下土壤理化性质的影响及其耦合关系

杨雨薇1, 何宝辉1, 韩学娇1, 时海香2, 张贵民2, 路兴慧1()   

  1. 1.聊城大学农学与农业工程学院,聊城 252000
    2.聊城市林业发展中心,聊城 252000
  • 收稿日期:2023-05-16 出版日期:2023-11-20 发布日期:2023-11-08
  • 通讯作者: 路兴慧 E-mail:luxinghui_0@163.com
  • 作者简介:杨雨薇(1998—),女,硕士研究生,从事森林生态方面的研究工作。
  • 基金资助:
    聊城市重点研发计划(2021GY01);聊城大学风景园林学科建设基金(319462212);国家自然科学基金(31901210);聊城大学大学生创新创业训练计划(CXCY2021238)

Effects of Stand Age on Functional Traits and Understory Soil Physicochemical Properties of Populus tomentosa and Their Coupling Relationships

Yuwei YANG1, Baohui HE1, Xuejiao HAN1, Haixiang SHI2, Guimin ZHANG2, Xinghui LU1()   

  1. 1.College of Agronomy and Agricultural Engineering,Liaocheng University,Liaocheng 252000
    2.Liaocheng Forestry Development Center,Liaocheng 252000
  • Received:2023-05-16 Online:2023-11-20 Published:2023-11-08
  • Contact: Xinghui LU E-mail:luxinghui_0@163.com
  • About author:YANG Yuwei(1998—),female,master candidate,mainly engaged in research on forest ecology.
  • Supported by:
    Key Research and Development Program of Liaocheng City(2021GY01);The Open Project of Liaocheng Universtiy Landscape Architecture Discipline(319462212);National Natural Science Foundation of China(31901210);Innovation and Entrepreneurship Training Program for students of Liaocheng University(CXCY2021238)

摘要:

为了揭示毛白杨(Populus tomentosa)人工林对环境的适应策略,并为更好地营林提供科学依据,以鲁西黄泛平原区域内10、20、35年生毛白杨人工林为研究对象,测定枝条及叶片功能性状共10个指标,分析毛白杨功能性状随林龄的变化规律,阐明影响功能性状变化的主要指标,辨析功能性状与环境因子之间的关系。结果表明:(1)在不同林龄下,枝条密度变异系数最小,为10.431,叶氮磷比变异系数为94.243,表明叶氮磷比受林龄的影响较大,枝条密度则较为稳定。3个林龄的叶片氮磷比显著低于14,表明毛白杨生长主要受氮限制。(2)随着林龄的增加,土壤环境得到改善,土壤全氮与土壤速效钾都呈增长趋势,土壤容重呈减小趋势,这些变化都有利于毛白杨更好地生长。(3)在各环境因子中,林分密度、土壤速效钾、土壤容重和土壤含水量是显著影响毛白杨人工林生长的环境因子。研究证明,在不同林龄下,毛白杨的功能性状在兼顾生长与环境的变化中表现出较强的适应性,该区域毛白杨生长主要受氮限制,可以适当施以氮肥以利于其生长。

关键词: 林龄, 人工林, 叶功能性状, 毛白杨, 鲁西黄泛平原

Abstract:

In order to reveal the adaptation strategy of Populus tomentosa to the environment, and to provide scientific basis for better forest management, the 10-, 20- and 35-year-old Populus tomentosa in the Yellow River floodplain of western Shandong Province were taken as the research objects, and 10 indicators of branch and leaf functional traits were measured, and the changes of community functional traits with the different stand ages were analyzed, and the main indicators affecting the changes of functional traits were clarified, and the relationships between functional traits and environmental factors were analyzed respectively. The results showed that (1)the coefficient of variation of branch density was the smallest, 10.431, and the coefficient of variation of leaf nitrogen-phosphorus ratio was 94.243, which indicated that leaf nitrogen-phosphorus ratio was greatly affected by the different stand ages, while branch density was more stable. leaf nitrogen-phosphorus ratios were significantly lower than 14 in three stand ages, indicated that the growth was manly limited by nitrogen. (2)As the age of the forest increased, the soil environment was improved, soil total nitrogen and soil available potassium showed an increasing trend, and the soil bulk density showed a decreasing trend, these changes were conducive to the better growth of P.tomentosa. (3)Among the environmental factors, stand density, soil available potassium content, soil bulk density and soil water content were the environmental factors that significantly affecting the growth of P.tomentosa. The results proved that the functional traits of the P.tomentosa showed strong adaptability in balancing growth and environmental changes at different stand ages, and that the growth of P.tomentosa in this region was mainly limited by nitrogen, so nitrogen fertilizer could be applied appropriately to facilitate its growth.

Key words: stand age, plantation forest, leaf functional traits, Populus tomentosa, Yellow River floodplain

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