深圳城市绿地土壤入渗性能及影响因素研究  

Urban Green Spaces in Shenzhen:Soil Infiltration Capacity and Its Influencing Factors

作　　者：黄晖 毕舒贻 字肖萌[3] 廖耿强 温暖玲 茹正忠 Huang Hui;Bi Shuyi;Zi Xiaomeng;Liao Gengqiang;Wen Nuanling;Ru Zhengzhong(Shenzhen Zhenheli Ecology&Environment Co.,Ltd,Shenzhen Guangdong 518052;Shenzhen Zhenheli Ecology&Environment Research Center,Shenzhen Guangdong 518052;Laboratories for Biogeochemistry,Public Technology Service Center,Xishuangbanna Tropical Botanical Garden,Chinese Academy of Sciences,Kunming 650032;Urban Administrative and Law Enforcement Bureau of Longgang District,Shenzhen Guangdong 518116)

机构地区：[1]深圳市真和丽生态环境股份有限公司,广东深圳518052 [2]深圳市真和丽生态环境科技研发中心,广东深圳518052 [3]中国科学院西双版纳热带植物园/公共技术服务中心/生物地球化学实验室,昆明650023 [4]龙岗区城市管理行政执法局,广东深圳518116

出　　处：《中国农学通报》2020年第14期74-79,共6页Chinese Agricultural Science Bulletin

基　　金：深圳市科技创新委员会项目“重20170416城市绿地系统低影响开发关键技术研发”(JSGG20170412145935322)。

摘　　要：研究深圳市城市绿地土壤水分入渗性能及其相关影响因素,以期为海绵城市建设,深圳市城市绿地水土保持提供参考。针对绿地不同植被类型(草地、乔木、灌木)及不同土层深度(0~30 cm、30~60 cm),利用Guelph入渗仪现场测定土壤饱和导水率,并分析土壤理化性质对土壤水分入渗的影响。结果表明:深圳绿地土壤入渗性能较差,饱和导水率不良及以下等级高达63.42%;乔木上层土壤及灌木上层土壤饱和导水率较高,均显著高于各自下层土壤饱和导水率(P<0.05);绿地土壤砂粒含量较高,平均达52%以上,土壤容重偏高,平均为1.62 g/cm3。土壤质地可显著影响土壤入渗特性,砂粒含量越高,土壤渗透性越好(P<0.01),容重、含水率、砾石含量与土壤饱和导水率显著负相关(P<0.05)。深圳绿地土壤入渗性能较差,未来可考虑降低压实程度、提高土壤砂粒含量来改良土壤渗透性。Studying soil infiltration capacity and its influencing factors in urban green spaces of Shenzhen can provide references for the construction of sponge city and soil-water conservation in urban green spaces.Aiming at different vegetation types(woody,shrub,lawn)and different soil layers(0-30 cm,30-60 cm)in urban green spaces,we analyzed the impacts of soil physicochemical properties on soil moisture,by determining the soil saturated hydraulic conductivity(Kfs)with a Guelph infiltrometer.The results showed that:the soil infiltration capacity of Shenzhen green space was poor,the grades of poor Kfsand below were up to 63.42%;the Kfs of the upper soil in woody and shrub was relatively high,which was significantly higher than that of the Kfsof the subsoil(P<0.05);both bulk density and sand particle contents of green spaces were quite high with 1.62 g/cm3 and 52%,respectively;the soil texture had a significant effect on Kfs,and there was a positive correlation between sand particle contents and Kfs(P<0.01);soil bulk density,initial moisture content and gravel content showed a significantly negative correlation with Kfs(P<0.05).In conclusion,the soil infiltration capacity in urban green spaces of Shenzhen is very poor,and reducing the compaction degree and increasing sand content could improve soil infiltration.

关 键 词：城市绿地 土壤入渗 土壤物理特性 深圳 

分 类 号：S152.7[农业科学—土壤学]