生物炭与丛枝菌根真菌联用对土壤有机碳含量及稳定性的影响

韩爽; 梁媛; 张德善; 王焱

文章摘要

韩爽,梁媛,张德善,王焱.生物炭与丛枝菌根真菌联用对土壤有机碳含量及稳定性的影响[J].农业环境科学学报,2026,45(1):127-138.

生物炭与丛枝菌根真菌联用对土壤有机碳含量及稳定性的影响

Effects of combined application of biochar and arbuscular mycorrhizal fungi on soil organic carbon content and stability

投稿时间：2025-01-25

DOI：10.11654/jaes.2025-0094

中文关键词: 生物炭丛枝菌根真菌矿物结合态有机碳铁结合态有机碳稻田土壤

英文关键词: ：biochar arbuscular mycorrhizal fungi mineral-associated organic carbon Fe-bound organic carbon paddy field soil

基金项目:2022姑苏乡土人才项目（苏市农人〔2023〕4号）；苏州市关键核心技术攻关（社会发展）项目（2023SS06）；江苏省研究生科研与实践创新计划项目（KYCX23_3346）

作者	单位	E-mail
韩爽	苏州科技大学环境科学与工程学院, 江苏苏州 215009
梁媛	苏州科技大学环境科学与工程学院, 江苏苏州 215009	liangyuan@usts.edu.cn
张德善	苏州科技大学环境科学与工程学院, 江苏苏州 215009
王焱	苏州科技大学环境科学与工程学院, 江苏苏州 215009

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中文摘要:

为探究生物炭和丛枝菌根真菌（AMF）联用对稻田土壤有机碳的固存效果和稳定性机制，本文通过室内培养实验，探究干湿交替条件下空白处理（CK）、单独添加生物炭（G_BC）、单独接种AMF（G_AMF）和二者联用（G_BA）对土壤有机碳（SOC）组分、稳定性及铁碳结合机制的影响。结果表明：G_BA处理显著提高了SOC、矿物结合态有机碳（MAOC）和铁结合有机碳（Fe-OC）。与CK相比，G_BA使SOC提高了504.23%，MAOC提高了1 306.80%。G_BA的颗粒态有机碳（POC）/SOC较CK显著降低了87.10%，但MAOC/SOC较CK提高了134.56%，达到92.17%，说明二者联用促进了POC向稳定的MAOC的转化。通过FTIR分析发现，G_BA的芳香类碳较CK提高了30.57%。G_BA中Fe-OC的含量较CK提高了1 397.51%，且OC/Fe摩尔比（2.72）表明CBA中Fe-OC的产生主要通过吸附和共沉淀机制协同促进。XPS结果进一步揭示，G_BA中Fe³⁺占比最高（29.61%），其高电荷密度可强化矿物和有机碳络合，提高土壤碳稳定性。相关分析显示，AMF侵染率与MAOC和Fe-OC均表现为显著正相关（P<0.05），生物炭添加提高了AMF的侵染率，协同促进了碳铁结合。研究表明，生物炭与AMF联用可显著提高稻田SOC含量和稳定性。

英文摘要:

In order to explore the sequestration effect and stability mechanism of biochar and arbuscular mycorrhizal fungi（AMF）on soil organic carbon in paddy field, this paper explores the effects of blank treatment（CK）, biochar addition alone（G_BC）, arbuscular mycorrhizal fungi inoculation alone（G_AMF）, and their combination（G_BA）on soil organic carbon（SOC）composition, stability, and iron-carbon binding mechanism of SOC under alternating dry-wet conditions through indoor incubation experiments. The results indicate that G BA treatment significantly increased SOC, mineral-associated organic carbon（MAOC）, and Fe-bound organic carbon（Fe-OC）. Compared to CK, G_BA increased SOC by 504.23% and MAOC by 1 306.80%. Compared to CK, G_BA significantly reduced particulate organic carbon（POC）/SOC by 87.10%, but MAOC/SOC increased by 134.56%, reaching 92.17%, suggesting that the combination of biochar and AMF promoted the conversion of POC to stable MAOC. FTIR analysis revealed that the aromatic carbon in G_BA increased by 30.57% compared to CK. The content of Fe-OC in G_BA increased by 1 397.51% compared to CK, and the OC/Fe molar ratio（2.72）indicated that the production of FeOC in C_BA was primarily promoted through adsorption and co-precipitation mechanisms. XPS results further revealed that G_BA had the highest proportion of Fe³⁺（29.61%）, and its high charge density enhanced the complexation of minerals and organic carbon, thereby improving soil carbon stability. Correlation analysis showed that MAOC and Fe-OC were significantly positively correlated with AMF colonization rate（P<0.05）, and biochar addition increased the AMF colonization rate, synergistically promoting carbon-iron binding. The results showed that the combination of biochar and AMF significantly enhances the content and stability of SOC in paddy soils.

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