土地利用方式对城市草坪土壤活性有机碳组分及碳库活度的影响  

Effects of Land Use Patterns on Active Organic Carbon Components and Carbon Pool Activity of Urban Lawn Soil

作　　者：刘骞 张腾龙 杨成都 方震毅 LIU Qian;ZHANG Tenglong;YANG Chengdu;FANG Zhenyi(College of Landscape Architecture,Changchun University,Changchun,Jilin 130000)

机构地区：[1]长春大学园林学院,吉林长春130000

出　　处：《北方园艺》2020年第19期94-101,共8页Northern Horticulture

基　　金：长春大学科研培育资助项目(ZKC201911)。

摘　　要：伴随着城市化发展,城市土壤生态环境也发生着变化。该研究以城市不同土地利用方式(公园、街道、校园、居住区)的草坪土壤为研究对象,探讨土地利用及土壤管理模式对城市草坪土壤理化性质、有机碳(SOC)、高活性易氧化有机碳(HROOC)、中活性易氧化有机碳(MROOC)、低活性易氧化有机碳(LROOC)含量以及碳库活度的影响。结果表明:不同土地利用方式下,城市草坪土壤pH均为弱酸性土壤;土壤含水量在土壤垂直分布上无显著性差异;土壤电导率伴随土层的加深呈逐渐减少趋势,土壤容重随着土层的增加呈递增趋势。不同土地利用方式对城市草坪土壤有机碳及活性组分影响明显,其中,公园的有机碳、易氧化有机碳含量最高,其次是居民区、公园、街道;在土壤垂直分布层面,不同土地利用方式下城市草坪土壤有机碳、易氧化有机碳的含量均伴随土层加深而逐渐减少。With the development of urbanization,the urban soil ecological environment is also changing.In this study,lawn soils with different land use patterns(parks,streets,campuses,residential areas)were taken as research objects.The effects of land use and soil management patterns on physical and chemical properties,organic carbon(SOC),highly active and oxidizable organic carbon(HROOC),moderately active and oxidizable organic carbon(MROOC),low active and oxidizable organic carbon(LROOC)content and carbon of urban lawn soils were discussed.The results showed that under different land use patterns,pH of urban lawn soil was weak acid soil;soil water content had no significant difference in the vertical distribution of soil;soil conductivity decreased gradually with the deepening of soil layer,and soil bulk density increased with the increase of soil layer.Different land use patterns had obvious effects on soil organic carbon and active components of urban lawn,among which the content of organic carbon and easily oxidized organic carbon in park was the highest,followed by residential area,park and street.In the vertical distribution of soil,the content of organic carbon and oxidized organic carbon in urban lawn soil under different land use patterns decreased gradually with the deepening of soil layer.

关 键 词：城市草坪 土地利用 活性有机碳 碳库活度 

分 类 号：S156[农业科学—土壤学] S181[农业科学—农业基础科学]