氮添加下夏季闽江河口短叶茳芏湿地土壤无机硫形态赋存特征

doi:10.13287/j.1001-9332.202506.035

应用生态学报 ›› 2025, Vol. 36 ›› Issue (6): 1859-1870.doi: 10.13287/j.1001-9332.202506.035

氮添加下夏季闽江河口短叶茳芏湿地土壤无机硫形态赋存特征

李尔恒^1,2, 孙志高^1,2,3*, 武慧慧^1,2, 方冠荣^1,2, 姚钦予^1,2, 李亚瑾^1,2, 钟小瑛^1,2

¹福建师范大学福建省亚热带资源与环境重点实验室, 福州 350117;
²福建师范大学湿润亚热带生态地理过程教育部重点实验室, 福州 350117;
³福建闽江河口湿地生态系统国家定位观测研究站, 国家林业和草原局, 福州 350215

收稿日期:2025-01-12 接受日期:2025-04-06 出版日期:2025-06-18 发布日期:2025-12-18
通讯作者: *E-mail: zhigaosun@163.com
作者简介:李尔恒, 男, 2001年生, 硕士研究生。主要从事湿地生物地球化学循环研究。E-mail: erhengLi01@163.com
基金资助:
福建省自然科学基金重点项目(2023J02012)、国家自然科学基金面上项目(42371105,41971128)和福建省“闽江学者奖励计划”

Impacts of nitrogen addition on variations of inorganic sulfur forms in soils of Cyperus malaccensis marsh in the Minjiang estuary during summer

LI Erheng^1,2, SUN Zhigao^1,2,3*, WU Huihui^1,2, FANG Guanrong^1,2, YAO Qinyu^1,2, LI Yajin^1,2, ZHONG Xiaoying^1,2

¹Fujian Provincial Key Laboratory for Subtropical Resources and Environment, Fujian Normal University, Fuzhou 350117, China;
²Ministry of Education Key Laboratory of Humid Subtropical Eco-geographical Process, Fujian Normal University, Fuzhou 350117, China;
³Fujian Minjiang Estuary Wetland Ecosystem National Observation and Research Station, National Forestry and Grassland Administration, Fuzhou 350215, China

Received:2025-01-12 Accepted:2025-04-06 Online:2025-06-18 Published:2025-12-18

摘要/Abstract

摘要： 选择闽江河口鳝鱼滩的短叶茳芏湿地为研究对象,基于野外氮添加模拟试验,对比研究了不同氮添加水平下(对照N₀,0 g N·m^-2·a^-1;低氮N_L,12.5 g N·m^-2·a^-1;中氮N_M,25.0 g N·m^-2·a^-1;高氮N_H,75.0 g N·m^-2·a^-1)湿地土壤无机硫形态的赋存特征。结果表明: 各氮处理湿地土壤中的水溶性硫(H₂O-S)和盐酸溶解性硫(HCl-soluble-S)含量与对照相比均呈增加趋势,其值在N_L、N_M、N_H处理下分别增加了36.0%、11.6%、7.5%和66.0%、29.4%、71.8%;而吸附性硫(Adsorbed-S)和盐酸挥发性硫(HCl-volatile-S)含量均呈降低趋势,降幅分别为45.8%、37.0%、4.0%和6.1%、1.7%、3.3%。氮添加整体提高了湿地土壤的总无机硫(TIS)含量和储量,且相较于N₀处理,N_L、N_M、N_H处理下的TIS含量分别增加了29.1%、8.2%、25.6%,储量分别增加了23.1%、13.7%、25.6%。不同氮处理下的TIS储量增幅主要取决于H₂O-S和HCl-soluble-S的贡献。氮添加下湿地土壤不同形态无机硫含量变化主要取决于氮养分(尤其是NH₄⁺-N/NO₃^--N)和pH的变化,并可能与植物-土壤系统之间的硫养分联系密切相关。氮添加下湿地土壤中的TIS含量及储量均明显升高,说明可供给植物吸收利用的有效硫养分整体增加,且该增加趋势在高氮处理(N_H)下尤为明显。

关键词: 无机硫形态, 氮输入, 湿地土壤, 短叶茳芏, 闽江河口

Abstract: We investigated the distribution of inorganic sulfur forms in the typical Cyperus malaccensis marsh in the Minjiang estuary by conducting a field nitrogen (N) addition experiment with four N addition levels (no N treatment, N₀, 0 g N·m^-2·a^-1; low N treatment, N_L, 12.5 g N·m^-2·a^-1; medium N treatment, N_M, 25.0 g N·m^-2·a^-1; and high N treatment, N_H, 75.0 g N·m^-2·a^-1) . Results showed that the contents of water-soluble-sulfur (H₂O-S) and HCl-soluble-sulfur (HCl-soluble-S) in marsh soil increased with N addition levels, and the values in the N_L, N_M and N_H treatments increased by 36.0%, 11.6%, 7.5% (H₂O-S) and 12.8%, 4.8%, 9.0% (HCl-soluble-S), respectively. The contents of adsorbed-sulfur (Adsorbed-S) and HCl-volatile-sulfur (HCl-volatile-S) decreased by 45.8%, 37.0%, 4.0% and 6.1%, 1.7% and 3.3%. N addition generally increased the contents and stocks of total inorganic sulfur (TIS). Compared with the N₀ treatment, the TIS content in the N_L, N_M and N_H treatments increased by 29.1%, 8.2% and 25.6%, while its stock increased by 23.1%, 13.7% and 25.6%, respectively. The elevation of TIS stock mainly rested with the contributions of H₂O-S and HCl-soluble-S. The variations of inorganic sulfur forms were mainly dependent on the alterations of N nutrient (especially NH₄⁺-N/NO₃^--N) and pH, and the relationships of S nutrient between plants and soils. Under N enrichment, the content and stock of TIS showed an increasing trend, indicating that the available S absorbed and utilized by plants was elevated and the increasing trend was particularly evident in the high N addition treatment (N_H).

Key words: inorganic sulfur form, nitrogen addition, marsh soil, Cyperus malaccensis, Minjiang estuary

李尔恒, 孙志高, 武慧慧, 方冠荣, 姚钦予, 李亚瑾, 钟小瑛. 氮添加下夏季闽江河口短叶茳芏湿地土壤无机硫形态赋存特征[J]. 应用生态学报, 2025, 36(6): 1859-1870.

LI Erheng, SUN Zhigao, WU Huihui, FANG Guanrong, YAO Qinyu, LI Yajin, ZHONG Xiaoying. Impacts of nitrogen addition on variations of inorganic sulfur forms in soils of Cyperus malaccensis marsh in the Minjiang estuary during summer[J]. Chinese Journal of Applied Ecology, 2025, 36(6): 1859-1870.

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氮添加下夏季闽江河口短叶茳芏湿地土壤无机硫形态赋存特征

Impacts of nitrogen addition on variations of inorganic sulfur forms in soils of Cyperus malaccensis marsh in the Minjiang estuary during summer

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