城市不同功能区绿地土壤理化性质及微生物生物量的分布特征  

Distribution of Soil Physicochemical Properties and Microbial Biomass in Three Green Lands with Different Use Types in the Urban Area

作　　者：李晓英 周惠民 李畅[2] 何丽斯[2] 刘晓青[2] 肖政[2] 陆海飞 苏家乐[2] LI Xiaoying;ZHOU Huimin;LI Chang;HE Lisi;LIU Xiaoqing;XIAO Zheng;LU Haifei;SU Jiale(College of Horticulture and Plant Protection,Yangzhou University,Yangzhou,Jiangsu 225009,China;Jiangsu Key Laboratory for Horticultural Crop Genetic Improvement,Institute of Leisure Agriculture,Jiangsu Academy of Agricultural Sciences,Nanjing 210014,China;Institute of Soil Science,Chinese Academy of Sciences,Nanjing 210008,China)

机构地区：[1]扬州大学园艺与植物保护学院,江苏扬州225009 [2]江苏省农业科学院休闲农业研究所/江苏省高效园艺作物遗传改良重点实验室,南京210014 [3]中国科学院南京土壤研究所,南京210008

出　　处：《土壤》2021年第4期874-880,共7页Soils

基　　金：国家青年科学基金项目(41807100);江苏省农业科技自主创新项目(CX(19)3047)资助。

摘　　要：为提高城市绿地生态系统服务功能和促进城市可持续发展,本文研究了南京市不同功能区绿地表层土壤理化性质和微生物生物量的分布特征。结果显示:土壤pH整体呈碱性且容重偏大;公园绿地土壤全氮、有效磷和速效钾含量显著高于道路绿地;不同功能区绿地土壤有机质含量无显著差异,但公园绿地土壤微生物生物量碳含量和微生物熵显著高于居住区和道路绿地;公园绿地土壤结构和养分均优于道路绿地。土壤微生物生物量碳含量与有机质、全氮和速效钾含量呈极显著正相关,与有效磷含量呈显著正相关,与容重呈极显著负相关;土壤有机质与全氮和速效钾含量呈极显著正相关,与有效磷含量和pH无显著相关性,与容重呈显著负相关。因此,勤松土,合理施肥,增加枯枝落叶等凋落物覆盖,提高土壤养护管理水平对修复城市土壤生态和建设生态城市具有重要意义。In order to improve the service function of the urban green space ecosystem and promote the sustainable development of the city,this study explored the distribution characteristics of physicochemical properties and microbial biomass in the surface soils of green lands in different functional areas in Nanjing,China.In general,the soils of these three green lands were all alkaline and the values of soil bulk density were all very high.Importantly,compared to roadside tree-soils,the contents of soil total nitrogen,available phosphorus and available potassium were significantly higher in the park green land.In addition,although there was no significant difference in the content of organic matter among the three green lands,soil microbial biomass carbon and microbial quotient in park green land were significantly higher than other two types of green land use.These results indicated that the soil structure and nutrients in park green land were better than roadside trees land.Furthermore,correlation analysis showed that soil microbial biomass carbon was significantly positively correlated with soil organic matter,total nitrogen and available potassium.Also,there was a significant positive correlation with available phosphorus,and a significant negative correlation with soil bulk density.Soil organic matter was significantly positively correlated with soil total nitrogen and available potassium,negatively correlated to soil bulk density and not correlated to available phosphorus and soil pH.Therefore,loosening the soil frequently,applying appropriate fertilizers,increasing the mulching of greenery wastes and improving soil conservation management level would play positive roles in restoring the soil ecology and urban ecological construction.

关 键 词：城市绿地 功能区 土壤养分 土壤微生物生物量碳 微生物熵 

分 类 号：S153[农业科学—土壤学] S154.36[农业科学—农业基础科学]