SUN Yanru,ZHENG Dongmei,YANG Xiaojun,et al.Soil Organic Carbon Distribution and Influencing Factors in Qixing Wetland of Liaohe River[J].Northern Horticulture,2025,(14):105-113.[doi:10.11937/bfyy.20245070]
辽河七星湿地土壤有机碳分布与影响因素研究
- Title:
- Soil Organic Carbon Distribution and Influencing Factors in Qixing Wetland of Liaohe River
- 文章编号:
- 1001-0009(2025)14-0105-09
- Keywords:
- Qixing Wetland of Liaohe River; soil organic carbon; spatial distribution; influencing factors
- 分类号:
- S 153.6
- 文献标志码:
- A
- 摘要:
- 以辽河七星湿地4种植被的表层（0~10 cm）土壤为试材，采用单因素方差、Pearson相关性及主成分分析方法，研究了该地区土壤有机碳（SOC）含量分布及影响因素特征，以期为评估人工湿地的碳汇能力及其可持续发展提供参考依据。结果表明：SOC含量空间分布特征为“东南高、东北低”。SOC含量分布差异明显，依次为玉米>水稻>芦苇>香蒲。相关分析结果表明，研究中碳组分与SOC存在显著正相关关系(P<0.05)的为易分解有机碳。土壤阳离子交换量（CEC）和含水率（SWC）与土壤SOC分别存在显著性相关(P<0.05)、极显著相关（P<0.01）关系。电导率（EC）和可溶性有机碳与SOC含量呈正相关关系，但未及显著水平。与其他指标均呈负相关。主成分分析结果表明，CEC、EC、pH对SOC含量解释、贡献率较高。综上，土壤SOC含量及其活性组分之间存在差异性，CEC和EC的变化解释SOC的大部分变异。
- Abstract:
- Taking surface (0-10 cm) soil of four vegetation species in Qixing Wetland of Liaohe River as the test material，and One-way variance，Pearson′s correlation and principal component analysis methods were adopted.The distribution of soil organic carbon (SOC) content and the characteristics of influencing factors in the area were studied，in order to provide reference for assessing the carbon sink capacity of artificial wetlands and their sustainable development.The results showed that the spatial distribution of SOC content was characterised by ‘high in the southeast and low in the northeast’，and there were obvious differences in the distribution of SOC content，with maize>rice>reed>cattail in the order of corn>rice>reed>cattail.Correlation analyses showed that there was a significant positive correlation (P<0.05) between the carbon fractions and SOC in the study，which was the easily decomposed organic carbon.Soil cation exchange capacity (CEC) and water content (SWC) had significant (P<0.05) and highly significant (P<0.01) correlations with soil SOC，respectively.Electrical conductivity (EC) and soluble organic carbon (SOC) were positively correlated with SOC content，but not at the significant level.Negative correlations were observed with the remaining indicators.Principal component analysis showed that CEC，EC and pH explained and contributed more to SOC content.In conclusion，there was variability between soil SOC content and its active components，and changes in CEC and EC explained most of the variation in SOC.
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备注/Memo
第一作者简介：孙砚茹（2001-），女，硕士研究生，研究方向为污染土壤生态修复。E-mail：sunyr327@163.com.责任作者：郑冬梅（1977-），女，博士，教授，博士生导师，现主要从事河口湿地与污染土壤生态修复等研究工作。E-mail：zhengdm126@163.com.基金项目：中国地质调查局东北地质科技创新中心区创基金资助项目（QCJJ2022-25）；国家自然科学基金资助项目（42371061）。收稿日期：2024-12-26