半干旱区高速公路边坡不同年代人工植被群落特征及其土壤特性研究  

Characteristics of artificial plantation communities and soil properties along highway slopes of semi-arid regions

作　　者：余海龙[1] 顾卫[1] 江源[1] 刘永兵[1] 

机构地区：[1]北京师范大学资源学院,北京100875

出　　处：《中国生态农业学报》2007年第6期22-25,共4页Chinese Journal of Eco-Agriculture

基　　金：交通部西部专项子课题(公路路域生态工程技术研究)资助

摘　　要：试验研究了呼集高速公路边坡建造人工植被后,在不同时间序列上土壤理化性状和植物群落特征及其恢复动态,结果表明：土壤肥力随人工植被建立时间的延长而逐渐恢复,表现为土壤黏粉粒、土壤有机质和全N含量的增加,以及土壤pH的下降,0～10cm表层土壤的恢复显著高于10～20cm土壤;随土壤环境条件的改善,侵入的草本植物数量、植被盖度增加,由简单的人工植被向复杂的灌草群落演替。但从群落物种组成看,公路边坡生态系统尚处于不稳定阶段。Temporal changes in plant communities and soil properties,one to two years after vegetation establishment along the Hu-Ji Highway slopes were investigated to assess the process and mechanism of soil fertility and vegetation restoration.The results indicate plant communities and soil have gradual restored with time after artificial vegetation construction.Slit,clay,organic matter and total N contents increase,but pH decreases with the time.Soil recovery within 0～10cm depth is more significant than within 10～20cm depth. The vegetation is developing into complex communities with increases of herbaceous plants and plant coverage.However,the highway slope eco-system is still unstable because annual grass forms the majority of the community along the slopes.

关 键 词：人工植被 土壤性状 植物群落 植被盖度 恢复动态 高速公路边坡 半干旱区 

分 类 号：S731.8[农业科学—林学]