Deciphering Differential Soil Carbon Mineralization Under Organic Amendments: Linking Enzyme Stoichiometry, Microbial Communities, and Functional Genes in Tibetan Agroecosystems
文献类型：期刊论文
| 作者 | Huang, Xiaofang1,2; Sun, Wei1,2; Yu, Chengqun1,2; Shi, Peili1,2; Wu, Junxi1,2; Li, Fadong1,2; Xiao, Ran3; Yu, Jialuo1,2; Wang, Jiabao4; Zhai, Yajun5 |
| 刊名 | LAND DEGRADATION & DEVELOPMENT
 |
| 出版日期 | 2026-01-30 |
| 卷号 | N/A |
| 关键词 | carbon mineralization C-cycling genes enzyme stoichiometry microbial community organic amendments |
| ISSN号 | 1085-3278 |
| DOI | 10.1002/ldr.70470 |
| 产权排序 | 1 |
| 文献子类 | Article ; Early Access |
| 英文摘要 | Organic amendments (OAs) are recognized as a promising strategy for enhancing soil organic carbon (SOC) stocks in agroecosystems. However, the effects of different OAs combined with chemical fertilizers (CF) on carbon (C) mineralization and how microorganisms mediate this process remain poorly understood. Here, to examine the effects of different fertilization management practices on SOC mineralization, an 85-day incubation experiment was conducted using farmland soil from the Lhasa Valley, Tibetan Plateau. Six treatments were established: no-fertilizer control (CK), pure urea treatment (U), and four OAs replacing 40% of urea, namely compost (CP), yak dung (YD), Qingke straw (QS), and Tibetan sheep dung (SD). We further explored relationships between SOC mineralization and soil physicochemical properties, enzyme stoichiometry, C-cycling functional genes, and microbial community composition. Results indicated that cumulative CO2 emissions were significantly higher under all fertilization treatments than in the CK. Among the fertilization treatments, the highest cumulative CO2 emissions were observed in the QS treatment at 763.77 mg/kg, while the lowest were in the CP and U treatments at 192.36 and 166.46 mg/kg, respectively. Moreover, significant positive correlations were observed between CO2 emissions and soil labile organic C (LOC), extracted organic C (EOC), dissolved organic C (DOC), and microbial biomass C (MBC). Fertilization alleviated soil microbial C limitation but exacerbated phosphorus (P) limitation while increasing C-cycling gene abundance, particularly for cbhI in the QS treatment. OAs significantly altered microbial community structure, promoting high C-preferring taxa such as Proteobacteria. Bacterial networks were more complex, stable, and sensitive to nutrient availability than fungal networks in driving SOC mineralization. Key predictors of cumulative CO2 emissions included C source availability (e.g., MBC, DOC, and LOC), C-cycling functional genes (e.g., cbhI), total P, and alkaline phosphatase activities. Under equivalent N input, CP most effectively mitigated soil CO2 emissions and maintained relative soil C stability, whereas QS showed greater potential to promote the turnover of labile C. Accordingly, we recommend prioritizing compost application in farmlands of the Lhasa Valley, supplementing OAs with P to alleviate nutrient limitations, and avoiding excessive application of untreated straw to minimize short-term carbon loss. These locally tailored, microbe- and soil-aligned strategies support sustainable SOC enhancement and high-altitude agricultural. |
| URL标识 | 查看原文 |
| WOS关键词 | USE EFFICIENCY ; ECOENZYMATIC STOICHIOMETRY ; TEMPERATURE SENSITIVITY ; NITROGEN ADDITION ; MATTER ; MICROORGANISMS ; SEQUESTRATION ; DECOMPOSITION ; RESPIRATION ; FERTILIZERS |
| WOS研究方向 | Environmental Sciences & Ecology ; Agriculture |
| 语种 | 英语 |
| WOS记录号 | WOS:001674708900001 |
| 出版者 | WILEY |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/221020]  |
| 专题 | 拉萨站高原生态系统研究中心_外文论文 |
| 通讯作者 | Shi, Peili; Wu, Junxi |
| 作者单位 | 1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modelling, Beijing, Peoples R China; 2.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing, Peoples R China; 3.Southwest Univ, Coll Resources & Environm, Interdisciplinary Res Ctr Agr Green Dev Yangtze Ri, Chongqing, Peoples R China; 4.Huazhong Agr Univ, Coll Plant Sci & Technol, Wuhan, Hubei, Peoples R China; 5.Tibet Agr & Anim Husb Univ, Plant Sci Coll, Linzhi, Peoples R China; 6.Northwest A&F Univ, Coll Nat Resources & Environm, Yangling, Peoples R China |
| 推荐引用方式 GB/T 7714 | Huang, Xiaofang,Sun, Wei,Yu, Chengqun,et al. Deciphering Differential Soil Carbon Mineralization Under Organic Amendments: Linking Enzyme Stoichiometry, Microbial Communities, and Functional Genes in Tibetan Agroecosystems[J]. LAND DEGRADATION & DEVELOPMENT,2026,N/A. |
| APA | Huang, Xiaofang.,Sun, Wei.,Yu, Chengqun.,Shi, Peili.,Wu, Junxi.,...&Chen, Li.(2026).Deciphering Differential Soil Carbon Mineralization Under Organic Amendments: Linking Enzyme Stoichiometry, Microbial Communities, and Functional Genes in Tibetan Agroecosystems.LAND DEGRADATION & DEVELOPMENT,N/A. |
| MLA | Huang, Xiaofang,et al."Deciphering Differential Soil Carbon Mineralization Under Organic Amendments: Linking Enzyme Stoichiometry, Microbial Communities, and Functional Genes in Tibetan Agroecosystems".LAND DEGRADATION & DEVELOPMENT N/A(2026). |
入库方式： OAI收割
来源：地理科学与资源研究所
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