植物生态学报 ›› 2024, Vol. 48 ›› Issue (11): 1393-1405.DOI: 10.17521/cjpe.2023.0370  cstr: 32100.14.cjpe.2023.0370

所属专题: 生物多样性

• 综述 •    下一篇

植物多样性对土壤有机碳及其稳定性影响的研究进展

张嘉睿, 段晓洋, 兰天翔, 苏日高格, 刘林, 郭钟阳, 吕浩然, 张炜平*()(), 李隆   

  1. 中国农业大学资源与环境学院/养分资源高效利用全国重点实验室/生物多样性与有机农业北京市重点实验室, 北京 100193
  • 收稿日期:2023-12-11 接受日期:2024-06-14 出版日期:2024-11-20 发布日期:2024-06-17
  • 通讯作者: ORCID: *张炜平: 0000-0002-7769-1255(zhangwp@cau.edu.cn)
  • 基金资助:
    国家重点研发计划(2022YFC3501503);国家重点研发计划(2022YFD1500702);国家自然科学基金(32371627);国家自然科学基金(31971450);中央高校基本科研业务费专项资金(2024TC059)

Advances in the role of plant diversity in soil organic carbon content and stability

ZHANG Jia-Rui, DUAN Xiao-Yang, LAN Tian-Xiang, SURIGAOGE Surigaoge, LIU Lin, GUO Zhong-Yang, LÜ Hao-Ran, ZHANG Wei-Ping*()(), LI Long   

  1. Beijing Key Laboratory of Biodiversity and Organic Farming, State Key Laboratory of Nutrient Use and Management, College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China
  • Received:2023-12-11 Accepted:2024-06-14 Online:2024-11-20 Published:2024-06-17
  • Contact: ZHANG Wei-Ping (zhangwp@cau.edu.cn)
  • Supported by:
    National Key R&D Program of China(2022YFC3501503);National Key R&D Program of China(2022YFD1500702);National Natural Science Foundation of China(32371627);National Natural Science Foundation of China(31971450);Chinese Universities Scientific Fund(2024TC059)

摘要:

土壤有机碳是陆地生态系统重要的碳(C)库。对森林、草原和农田生态系统的大量研究发现, 植物多样性能够增加土壤有机碳的含量, 并且越来越多的研究开始关注其对有机碳组分及稳定性的影响, 但对相关机制还缺乏系统的综述。为此, 该文系统总结了植物多样性对土壤有机碳含量、组分及稳定性的影响及其机制研究进展, 以期为通过植物多样性种植增加土壤碳氮(N)固持, 缓解全球气候变化提供科学依据。增加植物多样性, 首先可增加土壤中植物凋落物生物量, 改善混合凋落物的质量(如更低的C:N), 促进土壤有机碳的周转和积累; 其次, 可以通过凋落物的输入增加植物来源的碳积累或者通过促进微生物周转增加微生物来源的碳积累; 同时, 该过程还可提高土壤颗粒有机碳(POC)和矿物结合有机碳(MAOC)含量; 另外, 植物多样性的增加可以通过增强团聚体保护、改变土壤矿物离子浓度和改变微生物群落结构增加土壤有机碳的稳定性。该文对今后的研究进行了展望: (1)如何将植物多样性与不同管理措施结合增加土壤有机碳含量; (2)如何通过更多的不同生态系统植物多样性长期定位实验来探究其对土壤有机碳含量及组分的影响; (3)如何通过新的实验方法和手段(如同位素标记等)剖析植物多样性对土壤有机碳组分及其稳定性的影响; (4)探索植物多样性对不同深度土壤碳含量、组分及其稳定性的影响机制。

关键词: 植物多样性, 土壤有机碳, 有机碳组分, 植物来源碳, 微生物来源碳, 土壤有机碳稳定性, 间套作

Abstract:

Soil organic carbon (SOC) is an important carbon (C) pool in terrestrial ecosystems. Pant diversity can enhance SOC content in forests, grasslands, and agricultural ecosystems, and its potential effects on the composition and stability of SOC have aroused increasing interest. However, there is no systematic review of their underlying mechanisms. The present study therefore summarizes advances in research on the effects of plant diversity on the content, composition and stability of SOC and the underlying mechanism with the aim of providing a scientific basis for maximizing soil carbon and nitrogen (N) sequestration and mitigating global climate change through the promotion of plant diversity. Increasing plant diversity can increase the inputs of plant litter biomass into soils, enhance the quality of mixed litter (e.g., lower C:N), and promote the turnover and accumulation of SOC. It can also increase plant-derived C via root and litter inputs to soils, or increase microbe-derived C via enhanced microbial turnover. These processes can also increase soil particulate organic carbon (POC) and mineral associated organic carbon (MAOC) contents. In addition, increasing plant diversity can increase the stability of soil organic carbon by enhancing aggregate protection, changing mineral ion concentrations, and changing microbial community structure. Future studies are needed to investigate (1) how soil organic carbon content may be increased through integrated plant diversity and management options; (2) how the effects of plant diversity on soil organic carbon content and composition can be explored through long-term plant diversity field experiments in different ecosystems; (3) how the effects of plant diversity on soil organic carbon composition and stability can be examined using new experimental methods(e.g., isotope labeling); and (4) how the mechanisms underlying plant diversity effects on soil carbon content, composition and stability can be studied at different soil depths.

Key words: plant diversity, soil organic carbon, organic carbon components, plant-derived carbon, microbe-derived carbon, soil organic carbon stability, intercropping systems