摘要
以呼和浩特市主城区4种不同功能绿地(公园绿地、街边绿地、庭院绿地、行道绿地)为研究对象,采集0~20cm表层土壤,测定了土壤容重、总孔隙度、含水量、电导率、pH以及有机质、速效氮、速效磷和速效钾质量分数,参考第2次全国土壤普查分级标准,并采用修正的内梅罗指数法对其土壤肥力进行了评价。结果表明,不同功能绿地表层土壤物理和化学性质有显著差异,4种绿地土壤容重普遍偏高,总孔隙度和含水量偏低;土壤呈碱性,电导率介于119.1~148.2μS/cm,有机质和速效氮质量分数偏低,速效磷和速效钾质量分数偏高,具有明显的缺氮和相对富磷富钾特征,尤其是街边绿地和行道绿地;绿地土壤肥力综合指数为0.68~1.70,整体处于中等偏差水平,由高到低顺序依次为公园绿地、庭院绿地、街边绿地、行道绿地。根据以上结果,建议采用枯枝落叶堆肥归还、种植耐碱植物和固氮植物或有机肥和化学氮肥配施等措施来改善呼和浩特市主城区绿地土壤肥力状况。
Four kinds of green space with different functions(park green space,street green space,pavement green space and courtyard green space)in the main urban area of Hohhot city were taken as the research objects.The surface soil of 0~20cm was collected to measure the soil bulk density,total porosity,water content,conductivity,pH,organic matter and the contents available nitrogen,available phosphorus and available potassium.According to the classification standard of the second national soil census,the evaluation of soil fertility was carried out by using the method of modified Nemero index.The results show that the physical and chemical properties of the surface soil of green space with different functions are significantly different.The soil bulk density of the four types of green space is generally high,while their total porosity and water content are low.The soil is alkaline,with the conductivity between 119.1 and 148.2μS/cm.The content of organic matter and available nitrogen is low,while the content of available phosphorus and available potassium is high.The soil has obvious nitrogen deficiency and relatively phosphorus and potassium abundance,especially the street green space and pavement green space.The comprehensive soil fertility index of green space in Hohhot City is 0.68~1.70,which is at the low-medium level,and the sequence of the soil fertility index from high to low is the park green space,courtyard green space,street green space and pavement green space.Based on the above results,it is suggested to improve the soil fertility of green space in the main urban area of Hohhot city by returning litter compost,planting the alkali-plants or nitrogen-fixing plants,and applying organic fertilizer and chemical nitrogen fertilizer.
作者
梅清清
田仓
王松
罗鑫丽
田继萍
武美燕
黄美琴
Mei Qingqing;Tian Cang;Wang Song;Luo Xinli;Tian Jiping;Wu Meiyan;Huang Meiqin(Hubei Key Laboratory of Waterlogging Disaster and Agricultural Use of Wetland,College of Agriculture,Yangtze University,Jinzhou 434025,Hubei;Hohhot Landscape Management Bureau,Hohhot 010010,Inner Mongolia)
出处
《长江大学学报（自然科学版）》
CAS
2020年第4期69-72,I0006,共5页
Journal of Yangtze University(Natural Science Edition)
基金
内蒙古自然科学基金项目“呼和浩特市主城区不同绿地土壤状况及对绿化树养分利用的影响”(2017MS0315)
河南灌溉所开放基金项目“有机、常规种植棉田土壤有机碳及微生物特性研究”(SQZ2015-03)。
关键词
呼和浩特市
城市绿地土壤
土壤肥力
综合评价
改良措施
Hohhot City
urban green space soil
soil fertility
comprehensive evaluation
improvement measures
