南京林业大学学报(自然科学版) ›› 2024, Vol. 48 ›› Issue (1): 74-80.doi: 10.12302/j.issn.1000-2006.202302027

所属专题: 森林生态系统生物多样性研究专题

• 专题报道Ⅱ:森林生态系统生物多样性研究专题(执行主编 薛建辉 方炎明) • 上一篇    下一篇

华东地区亚热带典型常绿阔叶林地上生物量与环境因子的关系

董玉洁(), 毛岭峰(), 张敏, 鲁旭东, 吴秀萍   

  1. 南京林业大学生态与环境学院,江苏 南京 210037
  • 收稿日期:2023-02-15 修回日期:2023-07-24 出版日期:2024-01-30 发布日期:2024-01-24
  • 通讯作者: 毛岭峰
  • 基金资助:
    中国科学院战略性先导科技专项(XDB31000000)

Relationship between aboveground biomass and environmental factors of subtropical typical evergreen broad-leaved forest in east China

DONG Yujie(), MAO Lingfeng(), ZHANG Min, LU Xudong, WU Xiuping   

  1. College of Ecology and Environment, Nanjing Forestry University, Nanjing 210037, China
  • Received:2023-02-15 Revised:2023-07-24 Online:2024-01-30 Published:2024-01-24
  • Contact: MAO Lingfeng

摘要:

【目的】以华东地区亚热带典型常绿阔叶林中的栲类(Castanopsis spp.)类林和木荷(Schima superba)林两种林分类型为研究对象,研究环境因子对林分乔木层地上生物量的影响。【方法】基于各植物种的异速生长方程计算群落的地上生物量,利用相关性检验(Pearson)分析不同类型常绿阔叶林地上生物量与环境因子的关系,通过偏最小二乘法结构方程模型(PLS-SEM)构建环境因素与地上生物量之间的作用机制。【结果】①华东地区亚热带典型常绿阔叶林地上生物量随林龄的增长表现出极显著的增加趋势。②栲类天然林和木荷天然林地上生物量在研究区范围内与土壤pH呈极显著正相关,气温与太阳辐射总强度因子对木荷天然林地上生物量的变化有显著影响。③环境因素与栲类天然林地上生物量构建的结构方程模型中,气候因素对其地上生物量的直接作用系数要显著高于土壤因素。【结论】太阳辐射总强度、土壤pH、土壤容重因子对华东地区亚热带典型常绿阔叶林地上生物量的变化有显著影响。其中,栲类天然林地上生物量与土壤pH呈极显著正相关。木荷天然林地上生物量与气温因子呈显著负相关,与太阳辐射总强度因子呈极显著负相关,与土壤pH因子呈极显著正相关。

关键词: 亚热带, 常绿阔叶林, 地上生物量, 太阳辐射, 土壤pH, 土壤容重

Abstract:

【Objective】Taking the Castanopsis spp. and Schima superba forests in subtropical typical evergreen broad-leaved forests in east China as the research subjects, the effects of environmental factors on aboveground biomass of the tree layer were studied.【Method】The aboveground biomass of the community was calculated based on the allometric growth equation of various plant species, and the Pearson correlation test was used to analyze the relationship between aboveground biomass and environmental factors in different types of evergreen broad-leaved forests. The mechanism of action between environmental factors and aboveground biomass was constructed by the partial least squares structural equation model (PLS-SEM), which was employed to analyze the relationship between multiple sets of variables.【Result】(1) The aboveground biomass of subtropical typical evergreen broad-leaved forests in east China showed a extremely significant increasing trend with forest age. (2) The aboveground biomass of Castanopsis and S. superba natural forests positively correlated with soil pH in the study area, and for the S. superba natural forest, air temperature and total solar radiation intensity factors significantly affected the aboveground biomass. (3) In the structural equation model constructed using environmental factors and the aboveground biomass of Castanopsis natural forests, the direct effect coefficient of climate factors on aboveground biomass was significantly greater than that of soil factors.【Conclusion】The total solar radiation intensity, soil pH, and soil bulk density significantly affected the aboveground biomass of subtropical typical evergreen broad-leaved forests in east China. Among them, in the Castanopsis natural forest, aboveground biomass positively correlated with air the soil pH factor. In the S. superba natural forest, aboveground biomass negatively correlated with air temperature factor and total solar radiation intensity factor and positively correlated with soil pH factor.

Key words: subtropical, evergreen broad-leaved forest, aboveground biomass, solar radiation intensity, soil pH, soil bulk

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