Dynamics and driving factors of soil organic carbon sequestration during vegetation restoration on Loess Plateau

Hao Wanglin; Li Zongshan; Li Binbin

doi:10.13961/j.cnki.stbctb.2025.03.014

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Dynamics and driving factors of soil organic carbon sequestration during vegetation restoration on Loess Plateau

Carbon Effect Researches

- Dynamics and driving factors of soil organic carbon sequestration during vegetation restoration on Loess Plateau
- Bulletin of Soil and Water Conservation Vol. 45, Issue 3, Pages: 233-241(2025)
- 作者机构：
  
  1.吕梁学院生物与食品工程系，山西吕梁 033000
  2.中国科学院生态环境研究中心城市与区域;生态国家重点实验室，北京 100085
  3.西北农林科技大学水土保持科学与工程学院，陕西杨凌 712100
  4.中国科学院水利部水土保持研究所黄土高原旱地农业与土壤侵蚀国家重点实验室，陕西杨凌 712100
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2025.03.014
  CLC： S714
- CSTR：32312.14.stbctb.2025.03.014.
- Received：11 December 2024，
  
  Revised：2025-01-13，
  
  Published：10 June 2025
- 稿件说明：
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郝旺林, 李宗善, 李彬彬.黄土高原植被恢复过程中土壤碳固存变化及其驱动因素[J].水土保持通报,2025,45(3):233-241.

Hao Wanglin, Li Zongshan, Li Binbin. Dynamics and driving factors of soil organic carbon sequestration during vegetation restoration on Loess Plateau [J]. Bulletin of Soil and Water Conservation,2025,45(3):233-241.
郝旺林, 李宗善, 李彬彬.黄土高原植被恢复过程中土壤碳固存变化及其驱动因素[J].水土保持通报,2025,45(3):233-241. DOI： 10.13961/j.cnki.stbctb.2025.03.014. CSTR： 32312.14.stbctb.2025.03.014..

Hao Wanglin, Li Zongshan, Li Binbin. Dynamics and driving factors of soil organic carbon sequestration during vegetation restoration on Loess Plateau [J]. Bulletin of Soil and Water Conservation,2025,45(3):233-241. DOI： 10.13961/j.cnki.stbctb.2025.03.014. CSTR： 32312.14.stbctb.2025.03.014..

摘要

目的

分析黄土高原区域尺度不同植被类型、不同气候带土壤固碳速率变化，厘定不同影响因素的相对重要性，为黄土高原植被恢复过程中的土壤碳汇评估及管理提供理论依据。

方法

基于最新的土壤固碳数据库，整合1992—2023年发表的100篇文献（935条观测数据，55个地区），分析干旱半干旱黄土高原区域尺度植被恢复（人工乔木、人工灌木和撂荒草地）过程中土壤碳固存变化及其驱动因素。

结果

①人工乔木和灌木固碳速率均为0.30 Mg/（hm

· a），高于撂荒草地〔0.10 Mg/（hm

· a）〕；常绿人工林固碳速率〔0.45 Mg/（hm

· a）〕高于落叶人工林〔0.33 Mg/（hm

· a）〕，但后者具有更高固碳量，恢复约51 a后，常绿人工林具有更大固碳效益； ②土壤固碳速率随降雨量的增加而增加，但变化程度受植被类型和恢复年限影响； ③区域尺度上，土壤固碳速率先增加（

30 a）后稳定（

30 a），0~10 a，10~20 a，20~30 a，

30 a土壤固碳平均速率分别为0.02，0.13，0.19和0.18 Mg/（hm

· a）； ④在植被恢复过程中，不同恢复阶段土壤碳固存的主要影响因子不同，总体来说，主要受气候因子调控（降雨和温度）。降雨量、温度、恢复年限、植被类型和初始碳储量对土壤碳固存变化的相对重要度分别为31.8%，16.3%，17.7%，15.9%和18.3%。

结论

建议建立基于固碳速率大小及固碳能力可持续性的生态恢复模式。通过可持续的科学管理增加植被数量和质量，可有效增加生态脆弱区土壤固碳量。

Abstract

Objectives

The changes in soil carbon sequestration rates in different vegetation types and climatic zones at regional scales on the Loess Plateau were analyzed， and the relative importance of different influencing factors was determined to provide a theoretical basis for soil carbon sink assessment and management during vegetation restoration.

Methods

Based on the latest soil carbon sequestration database， by integrating 100 published studies （935 observational data points， 55 regions） from 1992 to 2023， changes in soil carbon sequestration and their driving factors during vegetation restoration （afforestation， shrub planting， and abandoned grassland） in the arid and semi-arid Loess Plateau were analyzed.

Results

① The carbon sequestration rates of afforestation and shrub planting 〔0.30 Mg/（hm² · a）〕 were higher than those of abandoned grassland 〔0.10 Mg/（hm² · a）〕. Evergreen plantations had a higher carbon sequestration rate 〔0.45 Mg/（hm² · a）〕 than deciduous plantations 〔0.33 Mg/（hm² · a）〕； however， the latter had a higher total carbon sequestration. After approximately 51 years of restoration， evergreen plantations showed greater carbon sequestration benefits. ② Soil carbon sequestration rates increased with precipitation； however， the extent of change was influenced by vegetation type and restoration duration. ③ At the regional scale， soil carbon sequestration rates initially increased （<30 years） and then stabilized （>30 years）. The average carbon sequestration rates for 0—10， 10—20， 20—30 years， and >30 years were 0.02， 0.13， 0.19， and 0.18 Mg/（hm² · a）， respectively. ④ During vegetation restoration， the main influencing factors of soil carbon sequestration varied across different restoration stages. Overall， it was primarily regulated by climatic factors （precipitation and temperature）. The relative contributions of precipitation， temperature， restoration duration， vegetation type， and initial carbon stock to changes in soil carbon sequestration were 31.8%， 16.3%， 17.7%， 15.9%， and 18.3%， respectively.

Conclusion

Establishing an ecological restoration model based on carbon sequestration rates and the sustainability of carbon sequestration capacity is recommended. Increasing the quantity and quality of vegetation through sustainable scientific management can effectively enhance soil carbon sequestration in ecologically fragile areas.

关键词

Keywords

references

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