基于保护性农业的土壤固碳过程研究进展

徐英德

doi:10.12357/cjea.20210889

基于保护性农业的土壤固碳过程研究进展

doi: 10.12357/cjea.20210889

徐英德^,

沈阳农业大学土地与环境学院/土肥高效利用国家工程研究中心　沈阳　110866

基金项目: 国家重点研发计划项目(2021YFD1500202)和辽宁省教育厅面上项目(LJKZ0662)资助

详细信息

通讯作者:
徐英德, 主要从事土壤肥力与土壤生态研究。E-mail: yingdexu@126.com

中图分类号: S154.1
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出版历程
- 收稿日期: 2021-12-15
- 录用日期: 2022-01-19
- 网络出版日期: 2022-02-17
- 刊出日期: 2022-04-11

Conservation agriculture-mediated soil carbon sequestration: A review

XU Yingde^,

College of Land and Environment, Shenyang Agricultural University / National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources, Shenyang 110866, China

Funds: The study was supported by the National Key R&D Program of China (2021YFD1500202) and the Scientific Research Funds Project of Education Department of Liaoning Province (LJKZ0662).

More Information

Corresponding author: XU Yingde, E-mail: yingdexu@126.com

摘要

摘要: 土壤有机碳(SOC)的固定是缓解全球气候变化和维持农田生态系统生产力的重要驱动力, 阐明SOC的累积与稳定机制及其驱动因素有助于合理调控土壤碳汇潜力。此外, 在全球生态环境退化和巨大粮食安全压力的挑战下, 寻求可持续的农田管理方式成为迫切需要解决的任务。保护性农业对土壤固碳有着重要影响, 且有助于实现粮食生产与生态效益的双赢。但鉴于土壤系统和功能的复杂性, 尚未形成保护性农业措施调控下土壤碳库形成的系统理论。以此为背景, 本文介绍并讨论了SOC不同的固定途径及其稳定机理, 探讨了传统农作措施下SOC的损失情况, 概述了保护性农业的内涵与主要组成, 综述了保护性农业措施对SOC固定的影响, 并深入剖析了保护性农业措施调控下的土壤固碳机理。在现有研究基础上, 应通过现代有机碳分组、分离技术和生物标识物技术, 明确保护性农业介导下SOC固定的微生物—团聚体—矿物协同作用机制, 并关注深层土壤固碳过程; 此外, 建立保护性农业长效研究体系有助于明确保护性农业措施调控下的土壤固碳潜力与实质; 最终, 应构建基于农田实践的SOC管理框架, 帮助土地管理者和农户制定科学合理的可持续土地利用战略。
- 保护性农业 /
- 土壤有机碳 /
- 碳固定 /
- 微生物 /
- 有机碳稳定性
Abstract: Soil organic carbon (SOC) sequestration is an important driving force for mitigating global climate change and maintaining farmland productivity. Clarifying the accumulation and stabilization mechanism of SOC and its influencing factors can help regulate the soil carbon (C) sink potential scientifically. In addition, under the challenge of global ecological environment degradation and food security pressure, seeking sustainable farmland management has become an urgent task. Conservation agriculture (CA) has an important impact on SOC sequestration and helps to achieve a win-win situation between food production and ecological benefits. However, given the complexity of soil systems, a systematic theory of soil C pool formation under the control of CA has not yet been formed. In this context, a review is presented with the introduction to and discussion on different sequestration pathways of SOC and its stabilization mechanism, the connotation and main components of CA, and the effect of conservation CA on SOC sequestration. Besides, the mechanism of SOC sequestration under the regulation of CA is discussed in detail. On the basis of existing study, modern organic C separation and biomarker technologies should be used to clarify the microbial-aggregate-mineral synergistic mechanism of SOC sequestration mediated by CA, and pay attention to the deep soil C sequestration process. In addition, the establishment of a long-term study system for CA will contribute to improving the regulation of CA on the potential and essence of SOC. finally, a SOC management framework based on farmland practice should be built to help land managers and farmers to formulate scientific and reasonable sustainable land use strategy.
- Conservation agriculture /
- Soil organic carbon /
- Carbon sequestration /
- Microorganisms /
- Organic carbon stability

HTML全文

图 1 全球碳收支模型^[16-18]

箭头中的数据代表碳通量, 方框和椭圆中的数据代表碳储量。

Figure 1. Contemporary global carbon budget^[16-18]

Data within arrows indicate the carbon fluxes, those within rectangles indicate the magnitude of carbon stock. SOC: soil organic carbon.

下载: 全尺寸图片幻灯片

图 2 土壤固碳机制示意图

Figure 2. Schematic diagram of soil carbon sequestration mechanism

下载: 全尺寸图片幻灯片

图 3 保护性农业的历史演变与主要内容

Figure 3. Historical evolution and main contents of conservation agriculture

下载: 全尺寸图片幻灯片

图 4 保护性农业驱动下的土壤固碳机制

Figure 4. Soil carbon sequestration mechanism driven by conservation agriculture

下载: 全尺寸图片幻灯片

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