| 韩丽冬,沃晓棠,赵 昶,刘广菊.大兴安岭非连续冻土区不同湿地土壤有机碳时空分布特征[J].林业调查规划,2026,51(4):51-58 |
| 大兴安岭非连续冻土区不同湿地土壤有机碳时空分布特征 |
| Temporal and Spatial Distribution Characteristics of Soil Organic Carbon in Different Wetland Types within Discontinuous Permafrost Region of the Greater Khingan Mountains |
| |
| DOI： |
| 中文关键词: 大兴安岭非连续冻土区 不同湿地类型 土壤有机碳 时空分布特征 影响因子 |
| 英文关键词: discontinuous permafrost region of the Greater Khingan Mountains different wetland types soil organic carbon temporal and spatial distribution characteristics influencing factors |
| 基金项目:黑龙江省省属科研院所科研业务费项目(CZKYF2024-1-B014、SCZ2023-02). |
|
| 摘要点击次数: 102 |
| 全文下载次数: 5 |
| 中文摘要: |
| 为揭示非连续冻土区不同湿地类型土壤有机碳的时空分布特征及其调控机制,以大兴安岭非连续冻土区草丛湿地、灌丛湿地和森林湿地为研究对象,分析0~50 cm土层土壤有机碳的垂向分布、季节动态及与土壤理化因子的相关性。结果表明,3种湿地类型土壤有机碳含量均随土层深度增加显著降低,表层(土层深度0~10 cm)为土壤有机碳主要富集层;3种湿地类型不同土层土壤有机碳含量的季节变化规律整体一致,由高到低依次为秋季>冬季>春季>夏季,且土层越浅季节波动幅度越大,0~10 cm土层季节极差显著高于40~50 cm土层;在4个季节中,森林湿地0~50 cm土层的土壤有机碳含量均显著高于灌丛湿地和草丛湿地,整体呈现出森林湿地>灌丛湿地>草丛湿地的梯度特征。土壤有机碳含量与全氮极显著正相关,与容重、pH极显著负相关;与含水率的正相关程度随湿地类型不同而变化。非连续冻土区湿地土壤有机碳含量的时空分布,受植被类型与土壤理化性质的综合影响。森林湿地具备更高的碳汇功能与生态价值,在冻土区湿地保护与管理中,应予以优先保护。 |
| 英文摘要: |
| To reveal the temporal and spatial distribution characteristics and regulatory mechanisms of soil organic carbon (SOC) in different wetland types within a discontinuous permafrost region, this study investigated grass wetlands, shrub wetlands, and forest wetlands in the discontinuous permafrost region of the
Greater Khingan Mountains. The vertical distribution, seasonal dynamics of SOC, and its correlations with soil physicochemical factors in the 0-50 cm soil layer were analyzed. The results showed that SOC content in all three wetland types decreased significantly with increasing soil depth, with the surface layer (0-10 cm)
serving as the main SOC accumulation zone. The seasonal variation patterns of SOC content in different soil layers were generally consistent across the three wetland types, following a descending order of autumn > winter > spring > summer. The seasonal fluctuation amplitude was more pronounced in shallower soil layers, with the seasonal range in the 0-10 cm layer being significantly higher than that in the 40-50 cm layer. Across all four seasons, the SOC content in the 0-50 cm soil layer of forest wetlands was significantly higher than that of shrub wetlands and grass wetlands, exhibiting a gradient characteristic of forest wetlands > shrub wetlands > grass wetlands. SOC content showed a highly significant positive correlation with total nitrogen and highly significant negative correlations with bulk density and pH. The degree of positive correlation with soil moisture content varied depending on wetland type. The temporal and spatial distribution of SOC content in wetlands within the discontinuous permafrost region was jointly affected by vegetation type and soil physicochemical properties. Forest wetlands had higher carbon sink capacity and ecological value and should be prioritized for protection in the conservation and management of permafrost wetlands. |
|
查看全文
查看/发表评论 下载PDF阅读器 |
| 关闭 |
|
|
|
