Characteristics of Soil Soluble Organic Carbon in Different Types of Urban Grassland

doi:10.11733/j.issn.1007-0435.2026.04.013

Acta Agrestia Sinica ›› 2026, Vol. 34 ›› Issue (4): 1275-1287.DOI: 10.11733/j.issn.1007-0435.2026.04.013

Characteristics of Soil Soluble Organic Carbon in Different Types of Urban Grassland

ZHENG Ding-yuan¹, LI Fu-cui^1,2, SHA Meng-xi¹, SHAO Ya-long¹, XIE Jun-fei³, LI Xin-yu^3,4, ZHANG Sheng-nan^1,2, LI Hai-han^1,2, ZHU Peng-hui¹, CHENG Yu-nan¹, YAN Yu-xin⁵, LIU Xi-lin¹

1. School of Grassland Science, Beijing Forestry University, Beijing 100083, China;
2. Engineering and Technology Research Center for Sports Field and Slope Protection Turf, National Forestry and Grassland Administration, Beijing 100083, China;
3. Beijing Academy of Forestry and Landscape Architecture, Beijing 100102, China;
4. Beijing Urban Ecosystem Positioning Observation and Research Station, Beijing 100102, China;
5. China Agricultural University, Beijing 100193, China

Received:2025-07-25 Revised:2025-10-16 Published:2026-04-15

不同类型城市草地土壤可溶性有机碳的特征

郑丁元¹, 李富翠^1,2, 沙梦溪¹, 邵亚龙¹, 谢军飞³, 李新宇^3,4, 张胜男^1,2, 李海涵^1,2, 朱澎荟¹, 程钰楠¹, 闫雨欣⁵, 刘锡霖¹

1. 北京林业大学草业与草原学院, 北京 100083;
2. 国家林业草原运动场与护坡草坪工程技术研究中心, 北京 100083;
3. 北京市园林绿化科学研究院, 北京 100102;
4. 北京城市生态系统定位观测研究站, 北京 100102;
5. 中国农业大学, 北京 100193

通讯作者: 李富翠，E-mail：li_fucui043@126.com
作者简介:郑丁元（2004-），男，汉族，河北衡水人，本科生，主要从事草地土壤碳氮循环方向研究，E-mail：1571720185@qq.com；
基金资助:
国家级大学生创新创业训练计划（202410022119）；国家自然科学基金（32401493）资助

Abstract

Abstract: To explore the influence of urban grassland types on soil DOC and its characteristics， this study took the urban green space ecosystem in Beijing as research object. Four treatments were established： bare land， cool-season grassland， warm-season grassland， and urban understory ground cover. The soil DOC content was measured， and the spectral characteristics of soil dissolved organic matter （DOM） were analyzed by using ultraviolet-visible spectroscopy and three-dimensional fluorescence spectroscopy. The results showed that compared to the bare land， the DOC content of the cool-season grassland surface soil was significantly decreased by 30% （P<0.05）， but there was no significant difference from warm-season grassland and urban understory ground. The UV spectra showed there was no significant difference between the aromaticity and the hydrophobicity of the DOM among the treatments. The fluorescence spectra showed that the DOM of urban grasslands had mixed source characteristics. In compared with the bare land， the humization process of the urban grasslands was enhanced but self-source contribution was decreased， with strong microbial activity but weak bio-availability. The results showed that the dynamic of DOC in urban grassland was regulated by vegetation type， management measures and microbial activity. The optimization of fertilization management and the consideration of carbon sequestration type of grass species could enhance the function and stability of urban soil carbon sequestration， which provided theoretical support for the improvement of urban green space ecological function.

Key words: Urban lawn, Vegetation types, Dissolved organic carbon, UV-fluorescence absorption characteristic

摘要： 为探究城市草地类型对土壤可溶性有机碳（Dissolved organic carbon，DOC）及其特征的影响，本试验以北京市城市绿地生态系统为研究对象，设置裸地、冷季型草坪、暖季型草坪和林下地被四种处理，测定土壤DOC含量，利用紫外可见光谱和三维荧光光谱分析土壤可溶性有机质（Dissolved organic matter，DOM）的光谱特征。结果显示：与裸地相比，冷季型草坪表层土壤DOC含量显著降低30%（P<0.05），而暖季型草坪、林下地被差异均不显著。紫外光谱显示，各处理DOM的芳香性与疏水性无显著差异。荧光光谱表明，城市草地DOM具有一定混合来源特征，城市草地腐殖化进程较裸地增强但自生源贡献降低，城市草地微生物活动较强但生物可利用性弱。研究表明：城市草地DOC动态受植被类型、管理措施及微生物活动多因素协同调控，优化草坪的施肥管理，考虑所选草种固碳类型，可增强城市土壤碳固存功能及稳定性，为城市绿地生态功能提升提供理论支撑。

关键词: 城市草地, 植被类型, 可溶性有机碳, 紫外-荧光吸收特征

CLC Number:

S812.2

ZHENG Ding-yuan, LI Fu-cui, SHA Meng-xi, SHAO Ya-long, XIE Jun-fei, LI Xin-yu, ZHANG Sheng-nan, LI Hai-han, ZHU Peng-hui, CHENG Yu-nan, YAN Yu-xin, LIU Xi-lin. Characteristics of Soil Soluble Organic Carbon in Different Types of Urban Grassland[J]. Acta Agrestia Sinica, 2026, 34(4): 1275-1287.

郑丁元, 李富翠, 沙梦溪, 邵亚龙, 谢军飞, 李新宇, 张胜男, 李海涵, 朱澎荟, 程钰楠, 闫雨欣, 刘锡霖. 不同类型城市草地土壤可溶性有机碳的特征[J]. 草地学报, 2026, 34(4): 1275-1287.

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Characteristics of Soil Soluble Organic Carbon in Different Types of Urban Grassland

不同类型城市草地土壤可溶性有机碳的特征

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