绿地类型转变对土壤总有机碳及其密度组分的影响  

Impact of green space type conversion on soil organic carbon and its density components

作　　者：李坤 杨垒 孙云利 汪鹏 简兴 LI Kun;YANG Lei;SUN Yun-li;WANG Peng;JIAN Xing(Anhui Construction Engineering Ecological Technology Co.,Ltd.,Bengbu 233030,China;College of Architecture,Anhui Science&Technology University,Bengbu 233030,China)

机构地区：[1]安徽建工生态科技股份有限公司,安徽蚌埠233030 [2]安徽科技学院建筑学院,安徽蚌埠233030

出　　处：《河南城建学院学报》2025年第1期83-90,123,共9页Journal of Henan University of Urban Construction

基　　金：安徽省住房城乡建设科学技术计划项目(2022-YF039);安徽省高校自然科学重点研究项目(2023AH051882)。

摘　　要：为研究城市绿地类型转变对绿地土壤碳汇的影响,运用相邻样地法和空间替代时间的方法,探讨了生态保育绿地转变为公园绿地后土壤总有机碳及其密度组分的变化。结果显示:(1)土壤有机碳密度在土层中有表聚性。(2)生态保育绿地土壤有机碳密度在0~80 cm土壤剖面为49.668±2.520 t·hm^(-2),在转变为公园绿地后,土壤有机碳密度降低了16.99%。(3)土壤轻组有机碳对绿地类型的变化较敏感。(4)生态保育绿地转变为公园绿地后,0~20 cm土层的重组有机碳含量显著降低。研究表明,生态保育绿地向公园绿地转变会导致上层土壤有机碳密度降低,碳损失主要发生在碳稳定性高的土壤重组组分中。To study the impact of changes in urban green space types on soil carbon sinks,this research used neighboring plot methods and spatial substitution for time approaches to investigate the changes in total organic carbon and its density components in soil after the transformation from ecological conservation green spaces to park green spaces.The results showed:(1)The total organic carbon density in soil exhibited surface aggregation.(2)The soil carbon density in ecological conservation green spaces was 49.668±2.520 t·hm^(-2) in the 0~80 cm soil profile,which decreased by 16.99%after transforming into park green spaces.(3)The content of light fraction organic carbon in soil was sensitive to changes in green space types.(4)After the transformation from ecological conservation green spaces to park green spaces,the content of heavy fraction organic carbon in the 0~20 cm soil layer significantly decreased.The study indicates that the transformation from ecological conservation green spaces to park green spaces leads to a reduction in upper soil carbon density,with carbon loss mainly occurring in the heavy fraction organic carbon component where carbon stability is high.

关 键 词：绿地类型 土壤总有机碳 轻组有机碳 重组有机碳 

分 类 号：S153.6[农业科学—土壤学]