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应用生态学报 ›› 2025, Vol. 36 ›› Issue (8): 2361-2369.doi: 10.13287/j.1001-9332.202508.015

• 研究论文 • 上一篇    下一篇

长白山退化泥炭沼泽恢复过程中土壤活性有机碳组分和酶活性变化

李玲慧1, 刘怡君1, 王怡萌1, 王铭1,2,3*   

  1. 1东北师范大学地理科学学院泥炭沼泽研究所, 长春 130024;
    2长白山地理过程与生态安全教育部重点实验室, 长春 130024;
    3东北师范大学国家环境保护湿地生态与植被恢复重点实验室, 长春 130024
  • 收稿日期:2024-12-31 接受日期:2025-06-09 出版日期:2025-08-18 发布日期:2026-02-18
  • 通讯作者: *E-mail: wangm100@nenu.edu.cn
  • 作者简介:李玲慧, 女, 2002年生, 硕士研究生。主要从事湿地恢复研究。E-mail: lilinghui278@nenu.edu.cn
  • 基金资助:
    国家重点研发计划项目(2023YFF1305800)和国家自然科学基金项目(42330509)

Change of soil labile organic carbon fractions and enzyme activities during peatland restoration in Changbai Mountains, Northeast China

LI Linghui1, LIU Yijun1, WANG Yimeng1, WANG Ming1,2,3*   

  1. 1Institute for Peat and Mire Research, School of Geographical Sciences, Northeast Normal University, Changchun 130024, China;
    2Key Laboratory of Geographical Processes and Ecological Security of Changbai Mountains, Ministry of Education, Changchun 130024, China;
    3State Environmental Protection Key Laboratory of Wetland Ecology and Vegetation Restoration, Northeast Normal University, Changchun 130024, China
  • Received:2024-12-31 Accepted:2025-06-09 Online:2025-08-18 Published:2026-02-18

摘要: 泥炭沼泽是陆地最重要的碳储存库之一,其土壤活性有机碳组分对环境条件变化的响应是反映泥炭沼泽土壤碳库稳定状况的重要指标。土壤酶是泥炭沼泽生物化学过程的主要参与者,影响泥炭沼泽物质循环和能量流动过程。本研究以长白山区退化、恢复3、5、8年和天然泥炭沼泽为对象,测定土壤活性有机碳组分和酶活性及土壤理化性质和地上生物量,探究退化泥炭沼泽在近自然恢复过程中土壤活性有机碳组分和酶活性的变化特征及其驱动因素。结果表明: 泥炭沼泽近自然恢复后,易氧化有机碳(EOC)、微生物生物量碳(MBC)和可溶性有机碳(DOC)含量均呈显著增加趋势。其中,MBC和DOC含量随着恢复年限的增加逐渐升高,与退化泥炭沼泽相比,恢复8年泥炭沼泽的MBC和DOC分别提高139.7%和160.2%;而EOC含量在恢复3年后即已达到天然泥炭沼泽水平,表现出更快速的恢复响应特征。近自然恢复后,泥炭沼泽0~10 cm土壤的β-1,4-N-乙酰葡糖氨糖苷酶(NAG)和酸性磷酸酶(ACP)活性显著增加。恢复8年后,两种酶活性较退化状态分别提高30.1%和84.1%;而β-1,4-葡萄糖苷酶(βG)活性在泥炭沼泽恢复3年后提高60.8%,但在恢复5年后略有下降,恢复8年后与退化泥炭沼泽的酶活性无显著差异。相关分析和结构方程模型结果显示,泥炭沼泽恢复过程中土壤有机碳(SOC)含量直接影响其活性碳组分,而活性碳组分和地上生物量共同影响土壤酶活性。综上,近自然恢复措施能有效提高退化泥炭沼泽土壤活性有机碳组分和酶活性,促进生态系统功能的恢复。本研究结果可为退化泥炭沼泽的生态恢复与管理提供重要的基础数据和参考依据。

关键词: 泥炭沼泽, 土壤活性有机碳, 酶活性, 长白山区, 近自然恢复

Abstract: Peatlands are one of the most important terrestrial carbon storage reservoirs. The response of soil labile organic carbon fractions to environmental changes is a pivotal indicator for assessing the stability of soil organic carbon pools. Soil enzymes act as primary participants in the biogeochemical processes of peatlands, significantly influence the material cycling and energy flow. Taking natural peatlands, degraded peatlands, and peatlands restored for 3, 5, and 8 years in the Changbai Mountains as test objects, we examined the changes of soil labile organic carbon fractions, enzyme activities, soil physicochemical properties, and aboveground biomass during peatland restoration. The results showed that the contents of easily oxidizable organic carbon (EOC), microbial biomass carbon (MBC), and dissolved organic carbon (DOC) increased following peatland restoration. Both MBC and DOC exhi-bited a progressive increase with restoration duration, showing cumulative rises of 139.7% and 160.2%, respec-tively, after 8 years of restoration. In contrast, EOC recovered to the level comparable to natural peatland within just 3 years of restoration, exhibiting a notably rapid recovery. Restoration significantly increase the activities of β-1,4-N-acetylglucosamine glycosidase (NAG) and acid phosphatase (ACP) in the 0-10 cm soil layer. After 8 years of restoration, the activities of NAG and ACP increased by 30.1% and 84.1%, respectively. However, the activity of β-1,4-glucosidase (βG) increased by 60.8% after 3 years of restoration, decreased slightly after 5 years of restoration, and showed no significant difference between the peatland restored for 8 years and the degraded peatlands. Correlation analysis and structural equation modeling showed that soil organic carbon directly influenced soil labile organic carbon fractions, while soil labile organic carbon fractions and aboveground biomass collectively influenced soil enzyme activity. In conclusion, natural-based restoration could effectively increase soil labile organic carbon fractions and soil microbial enzyme activities, thereby promoting peatland recovery. This study would provide basic data and a reference framework for the ecological restoration and management of degraded peatlands.

Key words: peatland, soil labile organic carbon fraction, soil enzyme activity, Changbai Mountain, natural-based restoration