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农学学报 ›› 2023, Vol. 13 ›› Issue (8): 46-55.doi: 10.11923/j.issn.2095-4050.cjas2022-0112

所属专题: 资源与环境 农业生态

• 土壤肥料 资源环境 生态 • 上一篇    下一篇

不同树种对森林土壤可溶性有机碳空间异质性的影响

孔令迁1(), 刘宪斌1,2(), 李云1   

  1. 1 玉溪师范学院化学生物与环境学院,云南玉溪 653100
    2 玉溪师范学院生物与环境工程研究院,云南玉溪 653100
  • 收稿日期:2022-08-09 修回日期:2022-10-17 出版日期:2023-08-20 发布日期:2023-08-16
  • 通讯作者: 刘宪斌,男,1981年出生,河北邯郸人,讲师,博士后,主要从事热带森林生态系统土壤碳循环和养分循环、热带森林生态系统干旱干扰、植物营养等方面的研究。通信地址:653100 云南省玉溪市红塔区凤凰路134号 玉溪师范学院化学生物与环境学院,Tel:0877-2050539,E-mail:liuxianbin@yxnu.edu.cn
  • 作者简介:

    孔令迁,女,2001年出生,云南昭通人,大学本科在读,研究方向:热带森林生态系统土壤碳循环和养分循环、植物营养。通信地址:653100 云南省玉溪市红塔区凤凰路134号 玉溪师范学院化学生物与环境学院,Tel:0877-2052169,E-mail:

  • 基金资助:
    云南省教育厅大学生创新创业训练计划项目“森林凋落物和根系分泌物对土壤活性碳的影响”(2021A024); 云南省教育厅科学研究基金项目“季节性干旱对云南次生常绿阔叶林碳库和养分循环的影响”(教师类项目:2019J0739(2019J0739)

Impacts of Various Tree Species on Spatial Heterogeneity of Soil Dissolved Organic Carbon in Forest Ecosystems

KONG Lingqian1(), LIU Xianbin1,2(), LI Yun1   

  1. 1 School of Chemistry, Biology and Environment, Yuxi Normal University, Yuxi 653100, Yunnan, China
    2 Institute of Biology and Environmental Engineering, Yuxi Normal University, Yuxi 653100, Yunnan, China
  • Received:2022-08-09 Revised:2022-10-17 Online:2023-08-20 Published:2023-08-16

摘要:

通过调查同一个森林生态系统不同样地中多个树种根际范围内土壤可溶性有机碳和土壤有机碳的含量,分析和探讨影响森林生态系统土壤可溶性有机碳和土壤有机碳空间异质性的环境因素。本项目在云南哀牢山亚热带中山湿性常绿阔叶原生林生态系统中进行,选择3个山谷样地上游森林生态系统原生土区域中7个主要树种作为研究对象,调查0~10 cm表层土壤可溶性有机碳和土壤有机碳的含量。研究结果表明:硬壳柯、变色锥、木果柯、多花山矾和南洋木荷等5个乔木树种根际范围内土壤可溶性有机碳和土壤有机碳含量显著高于云南连蕊茶和云南越桔2个灌木树种根际范围内土壤可溶性有机碳和土壤有机碳含量;5个乔木树种中硬壳柯和南洋木荷2个树种根际范围内土壤可溶性有机碳和土壤有机碳含量明显大于另外3个乔木树种,说明不同树种对土壤可溶性有机碳和土壤有机碳的空间异质性有明显影响。7个不同树种根际范围内土壤可溶性有机碳含量、土壤有机碳含量和土壤可溶性有机碳含量占土壤有机碳含量的比例在老君山神山谷样地中达到最大值,在三棵树山谷样地中降低为最低值,说明不同山谷样地中的环境条件也可以显著影响土壤可溶性有机碳和有机碳含量及两者之间的比例。本项目研究结果充分证明森林生态系统土壤可溶性有机碳和土壤有机碳空间分布规律的复杂性和环境控制因子的多样性,可为全球各种类型森林生态系统土壤有机碳成分和碳贮量等方面的研究内容提供新的思路和方向。

关键词: 土壤可溶性有机碳, 土壤有机碳, 硬壳柯, 南洋木荷, 变色锥, 木果柯, 多花山矾, 哀牢山亚热带中山湿性常绿阔叶林

Abstract:

To investigate the contents of soil dissolved organic carbon and soil organic carbon in the rhizosphere of several tree species in different sampling places in a forest ecosystem, the factors affecting the spatial heterogeneity of soil dissolved organic carbon and soil organic carbon in forest ecosystem were analyzed. This project was carried out in the subtropical montane moist evergreen broad-leaved primary forest ecosystem in Ailao Mountains of Yunnan Province. Seven dominant tree species in the primary soil area of forest ecosystem with high altitude in three sampling watersheds were selected as the research objects to investigate the contents of soil dissolved organic carbon and soil organic carbon in the 0-10 cm topsoil. The results showed that the contents of soil dissolved organic carbon and soil organic carbon in the rhizosphere of 5 tree species, including Lithocarpus hancei (Bentham) Rehd., Castanopsis rufescens (Hook. f. et Thoms.) Huang et Y. T. Chang., Lithocarpus xylocarpus (Kurz) Markg., Symplocos ramosissima Wall. ex G. Don and Schima noronhae Reinw. ex Bl. Bijdr, were significantly higher than those in the rhizosphere of the other 2 shrub species, namely, Camellia forrestii (Diels) Coh. St. and Vaccinium duclouxii (Levl.) Hand.-Mazz.. Among the 5 tree species, the contents of soil dissolved organic carbon and soil organic carbon in the rhizosphere of L. hancei and S. noronhae were significantly higher than those of the other 3 species, indicating that different tree species could apparently affect the spatial heterogeneity of soil dissolved organic carbon and soil organic carbon. The contents of soil dissolved organic carbon and soil organic carbon as well as the proportion of soil dissolved organic carbon in soil organic carbon in the rhizosphere of the 7 sampling tree species respectively reached the maximum value in the Laojunshanshen watershed, and decreased to the corresponding lowest value in the Sankeshu watershed, indicating that the environmental factors in different sampling watersheds could also obviously affect the contents of soil dissolved organic carbon and soil organic carbon as well as the ratio between them. The research results of this project fully proved the complexity of the spatial distribution of soil dissolved organic carbon and soil organic carbon in forest ecosystems and the diversity of environmental controlling factors, and could provide new scopes for the research on soil organic carbon composition and carbon storage in various types of forest ecosystems in the world.

Key words: soil dissolved organic carbon, soil organic carbon, L. hancei, S. noronhae, C. rufescens, L. xylocarpus, S. ramosissima, subtropical montane moist evergreen broad-leaved forest in Ailao Mountains