Dynamics of Multiple Elements in Particulate and Mineral-Associated Organic Matter Across Varying Soil Depths Following 13 years of Nitrogen and Water Addition in an Agro-Pastoral Ecotone Grassland
文献类型：期刊论文
| 作者 | Ke, Huiqi5; Wang, Shilin5; Niu, Guoxiang1,5,6; Wang, Ruzhen4; Li, Yibo3; Ning, Yanan2; Yang, Canran5; Wang, Yinliu6; Jiang, Yong4; Huang, Jianhui1,6 |
| 刊名 | ECOSYSTEMS
 |
| 出版日期 | 2026-03-19 |
| 卷号 | 29期号:2页码:33 |
| 关键词 | Nitrogen fertilization Precipitation increment Mineral elements Particulate organic matter Soil fractions Mongolian plateau |
| ISSN号 | 1432-9840 |
| DOI | 10.1007/s10021-026-01054-2 |
| 产权排序 | 4 |
| 文献子类 | Article |
| 英文摘要 | Although the effects of nitrogen (N) and water addition on carbon (C) and nutrient dynamics have been extensively investigated in surface soils of grassland ecosystems, the responses of different fractions of soil organic matter in subsoils -the primary reservoirs of elemental storage-to N and water inputs remain poorly understood. We evaluated organic C and six mineral elements (N, K, Ca, Mg, Fe, Mn) in bulk soil, particulate organic matter (POM), and mineral-associated organic matter (MAOM) at 0-10 cm (topsoil), 30-40 cm (upper subsoil), and 60-80 cm (deep subsoil) in a Eurasian steppe after long-term N and water addition. Although soil organic carbon (SOC) and total nitrogen (TN) concentrations were 3-4 times higher in POM (including free and occluded forms) than in MAOM, over 70% of total C and N stocks across the three soil depths were stored in MAOM, due to its greater mass. Similarly, total K, Ca, Mg, Fe, and Mn were predominantly stored in coarse MAOM (>= 20 & micro;m), while total Mg was mainly associated with fine MAOM (< 20 mu m). Additions of N and water significantly altered the distribution of SOC and mineral elements among soil fractions, with effects varying by depth. The stimulatory effects on SOC and TN were most pronounced in topsoil and upper subsoil. Greater changes in total K, Ca, Mg, Fe, and Mn concentrations or stocks occurred in fine MAOM than in coarse MAOM. Key drivers of SOC and TN distribution varied with soil depth, with soil available N and total K, Fe, Ca, and Mg concentrations in fine MAOM identified as major influencing factors. These findings highlight the critical role of mineral-associated processes, particularly in fine fractions, in shaping soil C and N dynamics in grassland ecosystems. [GRAPHICS] |
| URL标识 | 查看原文 |
| WOS关键词 | CARBON STORAGE ; SEMIARID GRASSLAND ; INNER-MONGOLIA ; DECOMPOSITION ; LIMITATION ; DEPOSITION ; FRACTIONS ; STABILITY ; MANGANESE ; NUTRIENT |
| WOS研究方向 | Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:001718597700001 |
| 出版者 | SPRINGER |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/221191]  |
| 专题 | 陆地表层格局与模拟院重点实验室_外文论文 |
| 通讯作者 | Niu, Guoxiang |
| 作者单位 | 1.Univ Chinese Acad Sci, Beijing, Peoples R China 2.Shanxi Agr Univ, Coll Grassland Sci, Taiju 030801, Peoples R China; 3.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Land Surface Pattern & Simulat, Beijing 100101, Peoples R China; 4.Hebei Univ, Sch Life Sci, Baoding 071002, Peoples R China; 5.Jiangxi Prov & Chinese Acad Sci, Jiangxi Prov Key Lab Carbon Neutral & Ecosyst Carb, Lushan Bot Garden, Jiujiang 332900, Peoples R China; 6.Chinese Acad Sci, Inst Bot, Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China; |
| 推荐引用方式 GB/T 7714 | Ke, Huiqi,Wang, Shilin,Niu, Guoxiang,et al. Dynamics of Multiple Elements in Particulate and Mineral-Associated Organic Matter Across Varying Soil Depths Following 13 years of Nitrogen and Water Addition in an Agro-Pastoral Ecotone Grassland[J]. ECOSYSTEMS,2026,29(2):33. |
| APA | Ke, Huiqi.,Wang, Shilin.,Niu, Guoxiang.,Wang, Ruzhen.,Li, Yibo.,...&Huang, Jianhui.(2026).Dynamics of Multiple Elements in Particulate and Mineral-Associated Organic Matter Across Varying Soil Depths Following 13 years of Nitrogen and Water Addition in an Agro-Pastoral Ecotone Grassland.ECOSYSTEMS,29(2),33. |
| MLA | Ke, Huiqi,et al."Dynamics of Multiple Elements in Particulate and Mineral-Associated Organic Matter Across Varying Soil Depths Following 13 years of Nitrogen and Water Addition in an Agro-Pastoral Ecotone Grassland".ECOSYSTEMS 29.2(2026):33. |
入库方式： OAI收割
来源：地理科学与资源研究所
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