植物生态学报 ›› 2026, Vol. 50 ›› Issue (3): 700-709.DOI: 10.17521/cjpe.2025.0321  cstr: 32100.14.cjpe.2025.0321

• 研究论文 • 上一篇    下一篇

茶园丛枝菌根真菌群落和土壤有机碳对镁肥的响应

何正嘉1, 曾歆然2, 王琳影1, 薛昕宇1, 苏钦泽3, 李宇1, 张寅杰1, 吴辉煌4, 陈成聪4, 吴良泉1, 魏安妮5, 仇云鹏6, 郭梨锦1,*()   

  1. 1 国际镁营养研究所, 福建农林大学资源与环境学院, 福州 350002
    2 福建农林大学林学院, 福州 350002
    3 福建农林大学公共管理与法学院, 福州 350002
    4 福建省安溪铁观音集团, 福建泉州 362000
    5 福建农林大学农学院, 福州 350002
    6 南京农业大学草业学院, 南京 210095
  • 收稿日期:2025-08-30 接受日期:2025-10-17 出版日期:2026-03-20 发布日期:2026-04-22
  • 通讯作者: *郭梨锦(guolijin2022@fafu.edu.cn)
  • 基金资助:
    国家自然科学基金(42407365);江苏省自然科学基金(BK20240193)

Response of arbuscular mycorrhizal fungal communities and soil organic carbon to magnesium fertilization in tea plantations

HE Zheng-Jia1, ZENG Xin-Ran2, WANG Lin-Ying1, XUE Xin-Yu1, SU Qin-Ze3, LI Yu1, ZHANG Yin-Jie1, WU Hui-Huang4, CHEN Cheng-Cong4, WU Liang-Quan1, WEI An-Ni5, QIU Yun-Peng6, GUO Li-Jin1,*()   

  1. 1 International Magnesium Institute, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou 350002, China
    2 College of Forestry, Fujian Agriculture and Forestry University, Fuzhou 350002, China
    3 School of Public Administration and Law, Fujian Agriculture and Forestry University, Fuzhou 350002, China
    4 Anxi Tieguanyin Group of Fujian Province, Quanzhou, Fujian 362000, China
    5 College of Agriculture, Fujian Agriculture and Forestry University, Fuzhou 350002, China
    6 College of Grassland Science, Nanjing Agricultural University, Nanjing 210095, China
  • Received:2025-08-30 Accepted:2025-10-17 Online:2026-03-20 Published:2026-04-22
  • Contact: *GUO Li-Jin(guolijin2022@fafu.edu.cn)
  • Supported by:
    National Natural Science Foundation of China(42407365);Natural Science Foundation of Jiangsu Province(BK20240193)

摘要:

镁肥施用对茶(Camellia sinensis)产量和品质形成具有重要作用, 其作用与丛枝菌根真菌(AMF)和土壤有机碳(SOC)密切相关。然而, 目前对于茶园AMF群落组成及SOC积累对镁肥的响应机制尚不清晰。该研究依托福建省安溪县铁观音茶园长期定位试验基地连续7年镁肥施用实验, 设置4组七水合硫酸镁施用梯度处理: Mg0 (0 kg·hm-2, 对照)、Mg50 (17.5 kg·hm-2)、Mg100 (35 kg·hm-2)和Mg200 (70 kg·hm-2), 旨在揭示茶园AMF群落和SOC含量对镁肥的响应。结果显示: 与Mg0相比, Mg50、Mg100和Mg200显著提高SOC含量(7.8%、11.7%和14.8%)、交换性Mg2+含量(1 370%、2 351%和2 746%)、土壤pH(2.3%、2.8%和4.2%)、土壤可溶性有机碳含量(3.5%、3.3%和4.0%)、修剪凋落物量(6.1%、13.9%和20.2%)和球囊霉属(Glomus)相对丰度(59.5%、75.4%和37.3%)。结构方程模型表明, 镁肥主要通过两条路径协同促进SOC固存: 一是通过改善土壤理化性质, 促进作物生长增加碳源输入, 该路径占比约54%; 二是通过优化AMF群落结构并增强球囊霉属的生态功能, 该路径占比约33%。该研究阐明了镁肥通过调控土壤理化性质和优化AMF群落结构提升茶园碳固存的双路径机制, 为茶园生态系统实现“碳中和”提供了理论依据和技术途径。

关键词: 丛枝菌根真菌, 土壤有机碳, 镁肥, 茶园

Abstract:

Aims Soil organic carbon (SOC) is a crucial component for maintaining soil health and fertility in tea (Camellia sinensis) plantations, and its fixation process is closely associated with arbuscular mycorrhizal fungi (AMF). However, the response mechanisms of AMF community composition and SOC accumulation to magnesium (Mg) fertilization in tea plantations remain poorly understood.

Methods This study was conducted at a 7-year long-term experimental site in Anxi County, Fujian Province, within Tieguanyin tea plantations subjected to continuous Mg fertilization. Four application rates of magnesium sulfate heptahydrate (MgSO4·7H2O) application were implemented: Mg0 (0 kg·hm-2, control), Mg50 (17.5 kg·hm-2), Mg100 (35 kg·hm-2), and Mg200 (70 kg·hm-2). The research aims to elucidate the responses of both AMF communities and SOC content to Mg fertilization in the tea plantation ecosystem.

Important findings Compared to Mg0, Mg50, Mg100, and Mg200 significantly increased SOC content (by 7.8%, 11.7%, and 14.8%), exchangeable Mg2+ content (by 1 370%, 2 351%, and 2 746%), soil pH (by 2.3%, 2.8%, and 4.2%), dissolved organic carbon content (by 3.5%, 3.3%, and 4.0%), tea pruning biomass (by 6.1%, 13.9%, and 20.2%), and the relative abundance of the Glomus (by 59.5%, 75.4%, and 37.3%). Structural equation modeling revealed that magnesium fertilization promotes SOC sequestration synergistically through two main pathways: firstly, by improving soil physicochemical properties and stimulating tea plant growth to enhance carbon input; and secondly, by optimizing the AMF community structure and strengthening the functional contribution of Glomus. This study elucidates the dual-pathway mechanism through which magnesium fertilization enhances carbon sequestration in tea plantations by regulating the soil microenvironment and AMF communities, providing a theoretical foundation and practical strategies for achieving carbon neutrality in tea garden ecosystems.

Key words: arbuscular mycorrhizal fungi, soil organic carbon, magnesium fertilizer, tea garden