不同营养类型泥炭地土壤酶活性及其化学计量特征

doi:10.13287/j.1001-9332.202506.013

应用生态学报 ›› 2025, Vol. 36 ›› Issue (6): 1880-1888.doi: 10.13287/j.1001-9332.202506.013

不同营养类型泥炭地土壤酶活性及其化学计量特征

徐玲^1,2,3, 薛丹^3,4, 孙嘉悦^1,2, 邹庆^1,2, 黄贝贝^1,2, 刘恋^1,2, 吴林^1,2*

¹生物资源保护与利用湖北省重点实验室, 湖北恩施 445000;
²湖北民族大学林学园艺学院, 湖北恩施 445000;
³中国科学院成都生物研究所, 成都 610213;
⁴中国科学院若尔盖湿地生态研究站, 四川红原 624400

收稿日期:2024-11-08 接受日期:2025-04-15 出版日期:2025-06-18 发布日期:2025-12-18
通讯作者: *E-mail: wulin20054557@163.com
作者简介:徐玲, 女, 2000年生, 硕士研究生。主要从事湿地生态研究。E-mail: 609385149@qq.com
基金资助:
国家自然科学基金项目(32260303)、中国科学院成都生物研究所青年创新项目(QNTS202201)和四川省科技厅项目(2025NSFJQ0028)

Soil enzyme activity and its stoichiometry characteristics in peatlands with different nutrient types

XU Ling^1,2,3, XUE Dan^3,4, SUN Jiayue^1,2, ZOU Qing^1,2, HUANG Beibei^1,2, LIU Lian^1,2, WU Lin^1,2*

¹Hubei Key Laboratory of Biological Resource Protection and Utilization, Enshi 445000, Hubei, China;
²College of Forestry and Horticulture, Hubei University for Nationalities, Enshi 445000, Hubei, China;
³Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610213, China;
⁴Ruoergai Wetland Ecosystem Research Station, Chinese Academy of Sciences, Hongyuan 624400, Sichuan, China

Received:2024-11-08 Accepted:2025-04-15 Online:2025-06-18 Published:2025-12-18

摘要/Abstract

摘要： 泥炭地是重要的陆地碳库,其生态功能受养分来源与水文条件的深刻影响。当前针对不同类型泥炭地的土壤酶活性特征及其驱动机制的对比研究仍较缺乏。本研究比较了养分来源和水分状况不同的2种泥炭地(雨养型泥炭地和矿养型泥炭地)的土壤酶活性、酶化学计量特征及土壤理化性质的差异,分析驱动不同类型泥炭地土壤酶活性及其化学计量特征的主要因素。结果表明: 雨养型泥炭地的含水量(SWC)、总碳(TC)、总氮、C/P、N/P比矿养型泥炭地高715.0%、42.8%、38.9%、84.2%、83.2%,而pH值、总磷、微生物生物量氮(MBN)比矿养型泥炭地低25.9%、25.0%、68.5%;雨养型泥炭地的酸性磷酸酶、β-1,4-葡萄糖苷酶、β-1,4-N-乙酰氨基葡萄糖苷酶、亮氨酸氨基肽酶、过氧化物酶活性均显著高于矿养型泥炭地1.2倍以上,而酚氧化酶活性比矿养型泥炭地低50%;SWC、pH、TC、C/P、N/P、MBN、矿物结合态有机碳是影响土壤酶活性及其化学计量比的显著因子。两种类型泥炭地均表现出磷限制,且雨养型泥炭地受磷限制程度更大。本研究为了解不同营养类型泥炭地养分资源限制提供了基础数据,为维持泥炭地长期稳定发展提供科学依据。

关键词: 泥炭地, 酶活性, 化学计量, 磷限制

Abstract: Peatlands are important terrestrial carbon reservoirs, and their ecological functions are deeply influenced by nutrient sources and hydrological conditions. However, the characteristics of soil enzyme activity and its driving mechanisms between different types of peatlands are still unclear. We compared soil enzyme activity, enzyme chemical stoichiometric characteristics, and soil physicochemical properties between ombrotrophic and minerotrophic peatlands which differed in nutrient sources and moisture conditions, and further analyzed the main factors driving the differences. The results showed that, in comparison with minerotrophic peatland, ombrotrophic peatland exhibited significantly higher soil water content (SWC), total carbon (TC), total nitrogen, C/P, and N/P ratios, by 715.0%, 42.8%, 38.9%, 84.2%, and 83.2%, respectively. Conversely, soil pH, total phosphorus, and microbial biomass nitrogen (MBN) in ombrotrophic peatland were significantly lower than those in minerotrophic peatland by 25.9%, 25.0%, and 68.5%, respectively. Furthermore, the activities of acid phosphatase, β-1,4-glucosidase, β-1,4-N-acetylglucosaminidase, leucine aminopeptidase, and peroxidase in ombrotrophic peatland were all more than 1.2 times higher than those in minerotrophic peatland. However, phenol oxidase activity was significantly lower by 50%. Soil enzyme activity and stoichiometric ratios were significantly affected by SWC, pH, TC, C/P, N/P, MBN, and mineral-associated organic carbon. Both peatland types exhibited phosphorus limitation, which was more severe in ombrotrophic peatland. The study has yielded fundamental data on nutrient resource limitations in different nutritional types of peatlands and provided a scientific basis for maintaining the long-term stable deve-lopment of peatlands.

Key words: peatland, enzyme activity, stoichiometry, phosphorus limitation

徐玲, 薛丹, 孙嘉悦, 邹庆, 黄贝贝, 刘恋, 吴林. 不同营养类型泥炭地土壤酶活性及其化学计量特征[J]. 应用生态学报, 2025, 36(6): 1880-1888.

XU Ling, XUE Dan, SUN Jiayue, ZOU Qing, HUANG Beibei, LIU Lian, WU Lin. Soil enzyme activity and its stoichiometry characteristics in peatlands with different nutrient types[J]. Chinese Journal of Applied Ecology, 2025, 36(6): 1880-1888.

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不同营养类型泥炭地土壤酶活性及其化学计量特征

Soil enzyme activity and its stoichiometry characteristics in peatlands with different nutrient types

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