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植物研究 ›› 2024, Vol. 44 ›› Issue (2): 307-320.doi: 10.7525/j.issn.1673-5102.2024.02.016

• 植物群落生态学 • 上一篇    

混交对杉木和山杜英混交林生长、结构和生产力的影响

周浩然1,2, 孙洪刚2, 张鹏1(), 韩媛媛2, 李文华2,3   

  1. 1.东北林业大学林学院,森林生态系统可持续经营教育部重点实验室,哈尔滨 150040
    2.中国林业科学研究院亚热带林业研究所,杭州 311400
    3.北华大学林学院,吉林 132013
  • 收稿日期:2023-09-15 出版日期:2024-03-20 发布日期:2024-03-11
  • 通讯作者: 张鹏 E-mail:zhangpeng@nefu.edu.cn
  • 作者简介:周浩然(1996—),男,硕士研究生,主要从事森林培育研究。
  • 基金资助:
    “十四五”国家重点研发计划子课题(2021YFD2201303-03)

Effect of Species-mixing on the Growth, Structure and Productivity of Cunninghamia lanceolata and Elaeocarpus sylvestris Mixed Forests

Haoran ZHOU1,2, Honggang SUN2, Peng ZHANG1(), Yuanyuan HAN2, Wenhua LI2,3   

  1. 1.Key Laboratory of Sustainable Forest Ecosystem Management Ministry of Education,College of Forestry,Northeast Forestry University,Harbin 150040
    2.Research Institute of Subtropical Forestry,Chinese Academic of Forestry,Hangzhou 311400
    3.College of Forestry,Beihua University,Jilin 132013
  • Received:2023-09-15 Online:2024-03-20 Published:2024-03-11
  • Contact: Peng ZHANG E-mail:zhangpeng@nefu.edu.cn

摘要:

为探究杉木(Cunninghamia lanceolata)与山杜英(Elaeocarpus sylvestris)的混交效应,以景德镇枫树山林场20年生杉木纯林、山杜英纯林和杉木-山杜英混交林为研究对象,每种林分类型设置3种坡位(上坡、中坡和下坡),分析树种混交对林分生长的影响,并分别探究混交效应对立地条件和生境因子的响应。结果表明:混交林蓄积较预期蓄积增加5%,表现略微增产;混交林中杉木蓄积较杉木纯林增加15%,混交林中山杜英蓄积较山杜英纯林减少13%。相对于纯林,两树种直径分布特征对混交的响应呈相反趋势,混交林中杉木直径分布峰值向高阶移动,而混交林中山杜英直径分布峰值向低阶移动。混交林及其纯林粗根直径-胸径的异速生长分析表明,混交林中杉木生长侧重于树干生长,而山杜英生长侧重于根系生长;无论林型和树种,坡位由上到下,林木生长会侧重于树干生长。杉木-山杜英混交效应与地位指数呈显著负相关(P<0.05),土壤有效磷是混交林生长的主要限制因子。杉木与山杜英混交可促进林分生长,且混交林对较差立地条件有更好的适应性。

关键词: 混交林, 林分生产力, 立地质量, 混交效应, 异速生长

Abstract:

To explore the mixing effect of Cunninghamia lanceolata and Elaeocarpus sylvestris, 20-year-old pure and mixed C. lanceolata and E. sylvestris plantations in Fengshushan Forestry Farm in Jingdezhen were selected as test objects, and three slope positions(up slope position, middle slope position and down slope position) were set for each stand type, and the effect of mixed tree species on the plantation growth was analyzed, and the responses of the mixed effects on site condition and on environmental factors was investigated, respectively. The results showed that the volume of the mixed forests ircreased by 5% compared with the expected volume, showing a slightl increase. Compared with pure stands, the diameter distributions of the two species showed opposite trends to the mixed, the peak of diameter distribution of C. lanceolata in mixed stands moved towards higher order, however, the peak of diameter distribution of E. sylvestris in mixed stands moved towards lower order. The allometric analysis of coarse root diameter-stem diameter of pure and mixed plantations showed that C. lanceolata allometry in mixed forests was focused on stem growth, while E. sylvestris allometry in mixed forests was focused on root growth, regardless of forest type and tree species, tree growth would focus on stem growth from slope position to bottom. There was a significant negative correlation between the mixed effect of C. lanceolata and E. sylvestris and the site index, the soil available phosphorus was the main limiting factor for the growth of the mixed forests. The mixed forest of C. lanceolata and E. sylvestris might improve stand growth, and the mixed stands had better adaptability to poor site conditions.

Key words: mixed forests, stand productivity, site quality, mixing effect, allometric growth

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