温州滨海湿地不同土地利用方式对土壤有机碳及其稳定性的影响

doi:10.13287/j.1001-9332.202609.033

应用生态学报 ›› 2026, Vol. 37 ›› Issue (9): 3109-3120.doi: 10.13287/j.1001-9332.202609.033

温州滨海湿地不同土地利用方式对土壤有机碳及其稳定性的影响

刘星¹, 刘单鹏², 李乾辰³, 张树刚⁴, 韩振春⁵, 陈秋夏¹, 杨升^1*

¹浙江省亚热带作物研究所, 温州资源植物创新与利用重点实验室,浙江温州 325005;
²湖南农业大学资源学院, 长沙 410128;
³浙江省海洋工程咨询协会, 杭州 310013;
⁴自然资源部温州海洋中心, 浙江温州 325011;
⁵温州工程勘察院有限公司, 浙江温州 325006

收稿日期:2026-02-10 接受日期:2026-06-19 出版日期:2026-09-18 发布日期:2026-10-12
通讯作者: ^*E-mail: yangsheng0072001@sina.com
作者简介:刘星, 男, 1989年生, 副研究员。主要从滨海林业种质创新与生态修复研究。E-mail: liuxingzy1989@163.com
基金资助:
浙江省“尖兵”“领雁”研发攻关计划项目(2023C02003)和温州市高水平创新团队“沿海特色植物创新和利用团队项目”(NY202401)

Effects of different land use types on soil organic carbon and its stability in coastal wetlands of Wenzhou, China.

LIU Xing¹, LIU Shanpeng², LI Qianchen³, ZHANG Shugang⁴, HAN Zhenchun⁵, CHEN Qiuxia¹, YANG Sheng^1*

¹Wenzhou Key Laboratory of Resource Plant Innovation and Utilization, Zhejiang Institute of Subtropical Crops, Wenzhou 325005, Zhejiang, China;
²College of Resources, Hunan Agricultural University, Changsha 410128, China;
³Zhejiang Association of Ocean Engineering Consulting, Hangzhou 310013, China;
⁴Wenzhou Marine Center, Ministry of Natural Resources, Wenzhou 325011, Zhejiang, China;
⁵Wenzhou Engineering Survey Institute Co., Ltd., Wenzhou 325006, Zhejiang, China

Received:2026-02-10 Accepted:2026-06-19 Online:2026-09-18 Published:2026-10-12

摘要/Abstract

摘要： 围垦养殖和外来物种入侵导致我国沿海滩涂湿地退化严重,红树林修复是改善滩涂生态功能的重要途径。然而,在我国红树林栽植北界的浙江温州,红树林造林对土壤有机碳(SOC)固存能力及其稳定性的影响尚不明确。本研究以温州乐清湾为研究区域,选取具有典型代表意义的4种土地利用类型——代表原生状态的光滩、代表红树林修复的秋茄林、代表外来植物入侵的互花米草滩以及代表高强度人为利用的养殖塘,分析不同土地利用类型下SOC含量、组分及其与铁铝氧化物的结合特征。结果表明:1)秋茄与互花米草土壤的SOC、活性有机碳和可溶性有机碳含量较高,分别为10.76～10.85、1.122～1.125和0.311～0.312 g·kg^-1,显著高于光滩和养殖塘。2)与其他类型土壤相比,秋茄土壤中游离氧化铁和游离氧化铝含量最高,分别为(12.11±0.74)和(3.91±0.31) g·kg^-1,且其Fe(Ⅲ)与Al-O占比分别达82.3%与93.6%,显著高于互花米草(66.7%与57.3%)、光滩(65.7%与81.2%)和养殖塘(65.7%与84.8%)。3)各土壤碳铁摩尔比均低于1,表明有机碳以铁氧化物吸附为主导;秋茄土壤中铁结合有机碳(Fe-OC)含量最高,达5.82±1.03 g·kg^-1,显著高于互花米草(2.98±0.43 g·kg^-1)、养殖塘(2.95±0.16 g·kg^-1)和光滩(2.21±0.31 g·kg^-1)。研究表明,秋茄红树林可通过促进铁铝氧化物向结晶态转化,形成高价态矿物-有机复合界面,从而显著增强滨海湿地土壤有机碳的固存与稳定性。

关键词: 滨海蓝碳, 红树林, 土壤有机碳, 铁氧化物, 矿物保护

Abstract: Reclamation aquaculture and invasions by alien species have caused severe degradation of coastal tidal-flat wetlands in China. Mangrove restoration is an important pathway for improving the ecological functions of these tidal flats. At the northern limit of mangrove afforestation in China (Wenzhou, Zhejiang Province), the effects of mangrove planting on the sequestration capacity and stability of soil organic carbon (SOC) remain unclear. In this study, we analyzed the contents and fractions of soil organic carbon, as well as their association characteristics with iron and aluminum oxides across these different land-use types in Yueqing Bay of Wenzhou as the research area. There were four representative land-use types, including bare mudflat representing the pristine state, Kandelia obovata forest representing mangrove restoration, Spartina alterniflora marsh representing alien plant invasion, and aquaculture ponds representing intensive anthropogenic use. The results showed that: 1) Soils under K. obovata and S. alterniflora had higher contents of SOC, labile organic carbon, and dissolved organic carbon, which ranged from 10.76 to 10.85, 1.122 to 1.125, and 0.311 to 0.312 g·kg^-1, respectively, being significantly higher than those in the bare mudflat and aquaculture ponds. 2) Compared with the other soil types, the K. obovata soil exhibited the highest contents of free iron oxide and free aluminum oxide, reaching (12.11±0.74) and (3.91±0.31) g·kg^-1, respectively. Moreover, the proportions of Fe(Ⅲ) and Al-O in the K. obovata soil reached 82.3% and 93.6%, respectively, which were significantly higher than those in S. alterniflora (66.7% and 57.3%), bare mudflat (65.7% and 81.2%), and aquaculture ponds (65.7% and 84.8%). 3) The molar ratios of carbon to iron (C/Fe) in all soils were below 1, indicating that organic carbon was predominantly retained through association with iron oxides by adsorption. The content of iron-bound organic carbon (Fe-OC) was highest in the K. obovata soil (5.82±1.03 g·kg^-1), which was significantly higher than that in S. alterniflora (2.98±0.43 g·kg^-1), aquaculture ponds (2.95±0.16 g·kg^-1), and bare mudflat (2.21±0.31 g·kg^-1). Our results demonstrated that K. obovata mangroves could enhance the sequestration and stability of soil organic carbon in coastal wetlands by promoting the transformation of iron and aluminum oxides into crystalline forms and forming high-valence mineral-organic complex interfaces.

Key words: coastal blue carbon, mangroves, soil organic carbon, iron oxide, mineral protection

刘星, 刘单鹏, 李乾辰, 张树刚, 韩振春, 陈秋夏, 杨升. 温州滨海湿地不同土地利用方式对土壤有机碳及其稳定性的影响[J]. 应用生态学报, 2026, 37(9): 3109-3120.

LIU Xing, LIU Shanpeng, LI Qianchen, ZHANG Shugang, HAN Zhenchun, CHEN Qiuxia, YANG Sheng. Effects of different land use types on soil organic carbon and its stability in coastal wetlands of Wenzhou, China.[J]. Chinese Journal of Applied Ecology, 2026, 37(9): 3109-3120.

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温州滨海湿地不同土地利用方式对土壤有机碳及其稳定性的影响

Effects of different land use types on soil organic carbon and its stability in coastal wetlands of Wenzhou, China.

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