摘要
为研究公路边坡植被的多样性特征及限制其发展的土壤因子,通过调查延庆县旅游观光段和临溪段公路植被,发现线路内共出现39科120种植物,其中乔木树种18种;灌木和草本植物分别有17种和85种。群落各层生态优势度指数的大小顺序为:乔木层>灌木层>草本层,在调查线路中,古龙路植被的生态优势度最高。草本层的植被多样性指数和丰富度指数比乔木层和灌木层的大,松闫路和古龙路的植被多样性和丰富度指数比栾赤路的小。应用灰色系统理论中的灰色关联度分析方法,对延庆县公路边坡植被多样性特征与土壤因子的关系进行了定量分析,确定出与延庆县公路边坡植被多样性特征关联度较大的土壤因子是pH值、速效钾含量和土壤容重,土壤全氮含量也是完全自然植被的古崖居路植被多样性的限制因子。
In order to investigate the relationship between vegetation diversity and soil factors,a vegetation survey was made on the highway side slopes in the tourism segment and near rivulet in Yanqing County.There were 39 families and 120 species of plants in the sections,of which there were 18 species of arbor,17 species of shrub,and 85 species of herb.By the ecological dominance index in the community,the layers of plants were in the order of tree layer〉shrub layer〉herbage layer.In the sections,the vegetation ecological dominance index of Gulong Road was the greatest.The diversity and richness of herb layer were greater than canopy layer and bush layer.The vegetation diversity and richness on Luanchi road were greater than those on Songyan Road and Gulong Road.The relationship between vegetation diversity and soil factors was analyzed by applying grey incidence analysis.Results indicated that the relation degree between vegetation diversity and soil pH value was the biggest,the relation degree between vegetation diversity and available K was the second,and the relation degree between vegetation diversity and soil bulk density was the third.The total nitrogen was one of the plant diversity restricting factors on Guyaju road completely covered by nature plants.
出处
《水土保持通报》
CSCD
北大核心
2010年第6期64-68,90,共6页
Bulletin of Soil and Water Conservation
基金
公路交通环境保护技术交通行业重点实验室开放课题资助(GJH-2009-04)
北京市路政局公路生态绿化研究课题
延庆县公路生态绿化研究课题
关键词
公路边坡
植物群落
多样性
灰色关联度分析
highway side slope
vegetation community
diversity
grey incidence analysis
