太原市城市绿地土壤生态化学计量特征研究  

Study on the Ecological Stoichiometric Characteristics of Soil in Urban Green Spaces of Taiyuan City

作　　者：任煜堃 Ren Yukun(Shanxi Academy of Forestry and Grassland Sciences,Taiyuan 030012,China;Shanxi Taiyuan Urban Ecosystem Research Station,Taiyuan 030012,China)

机构地区：[1]山西省林业和草原科学研究院,山西太原030012 [2]山西太原城市生态系统国家定位观测研究站,山西太原030012

出　　处：《山西林业科技》2024年第3期10-13,共4页Shanxi Forestry Science and Technology

摘　　要：在太原市建成区内选取62个具有代表性的城市绿地样点,采集0 cm~10 cm、10 cm~20 cm、20 cm~30 cm土层深度的土壤样品,分析其有机碳、全氮、全磷含量并计算土壤碳、氮、磷生态化学计量比。结果表明,太原市城市绿地土壤有机碳含量和全磷含量均表现为生产绿地最高、公园绿地最低,全氮含量差异不大。从土层深度来看,不同绿地类型土壤有机碳含量、全氮含量和全磷含量分布各异。土壤C/N均值为50.22,表现为生产绿地最大、公园绿地最小;土壤C/P均值为11.34,表现为附属绿地和防护绿地大于公园绿地和生产绿地;土壤N/P均值为0.24,各绿地类型间差异不大。不同绿地类型土壤生态化学计量比随土层的变化趋势各不相同,土壤C/N均表现为表层大于下层。除生产绿地外,其他绿地类型土壤C/P、C/N与有机碳含量之间,土壤N/P和全氮含量之间均表现出较强的正相关性。62 representative urban green space sampling points in the built-up area of Taiyuan City were selected,soil samples at depths of 0 cm~10 cm,10 cm~20 cm and 20 cm~30 cm were collected to analyze their organic carbon,total nitrogen,total phosphorus contents and calculate the soil carbon,nitrogen,phosphorus ecological stoichiometry ratio.The results showed that the contents of organic carbon and total phosphorus of urban green spaces in Taiyuan City were highest in production green spaces and lowest in park green spaces,while the total nitrogen content showed little difference.From the perspective of soil depth,the distribution of organic carbon,total nitrogen and total phosphorus contents in different types of green spaces was different.The soil C/N average ratio was 50.22,with production green spaces having the highest value and park green spaces having the lowest value.The soil C/P average ratio was 11.34,the average value of attached green space and protection green land was greater than that of park green spaces and production green spaces.The soil N/P average ratio was 0.24,with little difference among different types of green spaces.The trend of soil ecological stoichiometry with soil layers varies among different types of green spaces,and the soil C/N ratio was consistently higher in the surface layer than in the lower layer.Except for production green spaces,there were strong positive correlations between soil C/P ratio and organic carbon content,soil C/N ratio and organic carbon content,soil N/P ratio and nitrogen content in other types of green spaces.

关 键 词：城市绿地 生态化学计量特征 土壤 有机碳 全氮 全磷 

分 类 号：S714[农业科学—林学]