植被修复初期对贵州高原喀斯特湿地湖滨带碳元素的影响

以贵州草海保护区（海拔约为2171.7 m）为研究对象，采用时空互代法研究不同地貌环境（非喀斯特地貌、喀斯特地貌及植被修复地貌）下，保护区内土壤有机碳（SOC）、易氧化有机碳（ROC）、可溶性有机碳（DOC）含量分布规律及其影响因素，以期为准确估算保护区内碳组分储量及其固碳效益评价提供科学依据。结果表明：（1）不同地貌下有机碳（SOC）含量、易氧化有机碳（ROC）和可溶性有机碳（DOC）与土层深度存在极显著负相关关系，即随土层深度增加而降低；（2）在0-50 cm土层中喀斯特地貌与非喀斯特地貌下土壤团聚体均以>0.2 mm粒级有机碳含量相对较高，<0.125 mm粒级含量最低。（3）植被恢复过程中，土壤碳组分含量显著增加，土壤固碳能力增强提高了土壤有机碳含量，促进了土壤团聚体的形成，同时也提高了土壤团聚体的稳定性。

Influence of vegetation restoration on carbon in the lakeside zone of Karst Wetland in Guizhou Plateau

This paper takes Guizhou Caohai Reserve (2171.7 m above sea level approximately) as the research object, the time-space substitution method was used to study the distribution and influencing factors of soil organic carbon (SOC), easily oxidizable organic carbon (ROC) and soluble organic carbon (DOC) in different geomorphological environments (non-karst landforms, karst landforms and vegetation restoration landforms). The purpose of this paper is to provide a scientific basis for accurately estimating the reserves of carbon components and evaluating the benefits of carbon sequestration in the reserve.The results showed that:(1) The contents of SOC, ROC and DOC,under different landforms had very significantly negative correlation with soil depth, that was, they decreased with the increase of soil depth. (2) In the 0-50 cm soil layer, both karst and non-karst landforms had relatively higher organic carbon content in soil aggregates larger than 0.2 mm, and the lowest content of smaller than 0.125 mm. (3) During the process of vegetation restoration, the content of soil carbon components increased significantly, and the enhancement of soil carbon sequestration capacity increased soil organic carbon content, promoted the formation of soil aggregates, and also improved the stability of soil aggregates.