Simulation of soil organic carbon dynamics in farmland in Huainan City based on CENTURY model

Journal Information

J. Hefei Univ. Tech. (Nat. Sci.), Oct.2024, Vol.47 No.10: 1305-1313

DOI: 10.3969/j.issn.1003-5060.2024.10.002

Authors

WU Anyun $ ^{1} $, LI Xiangling $ ^{1,2} $, ZHAO Yan $ ^{1} $, MA Lei $ ^{1} $, SONG Renliang $ ^{3} $, ZHANG Chunlei $ ^{4} $

(1. School of Resources and Environmental Engineering, Hefei University of Technology, Hefei 230009, China; 2. Anhui Province Engineering Research Center for Mineral Resources and Mine Environments, Hefei 230009, China; 3. Anhui Institute of Geo-Environment Monitoring, Hefei 230001, China; 4. Anhui Institute of Geological Experiments (Hefei Mineral Resources Supervision and Testing Center of Ministry of Land and Resources), Hefei 230041, China)

Abstract and Keywords

Abstract: Farmland soil has been subject to long-term human intervention, and its carbon turnover intensity is greater than that of natural soil. Studying the spatiotemporal distribution of organic carbon in farmland soils is conducive to promoting the management of regional ecosystem carbon stock, which is of great significance for realizing the carbon peaking and carbon neutrality goals. This paper took the farmland ecosystem in Huainan City as the research object, and used the CENTURY model to simulate the variation trend of soil organic carbon density (SOCD) in the cultivated layer (0-20 cm) of farmland in Huainan City from 1961 to 2023. The results showed that the CENTURY model is applicable to the farmland ecosystem in Huainan City. The SOCD of farmland soils in Huainan City showed an increasing trend from 1961 to 2023, and the average value of SOCD in 2023 was 3.16 kg/m², with the strongest accumulation of slow soil organic carbon and the weakest accumulation of active soil organic carbon. The spatial distribution pattern of SOCD was high in the northeast and south-central

Keywords: soil organic carbon; CENTURY model; spatiotemporal distribution; farmland

作者信息

吴安云 $ ^{1} $，李湘凌 $ ^{1,2} $，赵燕 $ ^{1} $，马雷 $ ^{1} $，宋仁亮 $ ^{3} $，张春雷 $ ^{4} $

(1. 合肥工业大学资源与环境工程学院，安徽合肥 230009；2. 安徽省矿产资源与矿山环境工程技术研究中心，安徽合肥 230009；3. 安徽省地质环境监测总站，安徽合肥 230001；4. 安徽省地质实验研究所（国土资源部合肥矿产资源监督检测中心），安徽合肥 230041)

摘要和关键词

摘要: 农田土壤长期受到人类干预,与自然土壤相比,其碳周转强度更大。研究农田土壤有机碳的时空分布有利于推动区域生态系统碳储量管理,对实现“双碳”目标有重要意义。文章以淮南市农田生态系统为研究对象,运用CENTURY模型模拟淮南市农田耕层(0~20 cm)土壤有机碳密度(soil organic carbon density, SOCD)在1961—2023年的变化趋势。结果表明:CENTURY模型在淮南市农田生态系统中有着良好的适用性;1961—2023年淮南市农田SOCD呈增长趋势,2023年SOCD均值为3.16 kg/m²,其中土壤缓性有机碳累积最强,活性有机碳累积最弱;SOCD呈现东北部、中南部高,西北部低的空间分布格局;气温、降水、pH值、容重和农田管理均对土壤有机碳累积产生影响。研究显示,淮南市农田土壤有着较好的碳储存能力。

关键词: 土壤有机碳；CENTURY 模型；时空分布；农田

Funding

国家自然科学基金资助项目（42072276）；安徽省公益性地质调查资助项目（2021-g-27）

合肥工业大学学报(自然科学版)

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