Investigation and landscape application evaluation on Carex resources in Beijing

Carexplant is excellent ground cover plants in city landscape,and plays an important role in the restoration and improvement of ecological environment,this paper in order to understand the wild Carexresources in Beijing,and lay the foundation for Carexplant germplasm breeding.From the spring of 2006 to 2008,we investigated the Carex resources at 20 sites in Beijing.The results showed that Carex was widely spread in various environment,including valley,roadside,field side,hillsides,under thin or thick forests and fringe wetland,which indicated that Carexhad very high tolerance to shade,drought,leanness and waterlogging.In total 21 accessions of Carex were collected,and their growth and phenological periods were observed in field plots.According to comprehensive evaluation on their stress tolerance and qualitative traits,three species of Carex(C.leucochlora,C.humilis,C.lanceolata)suitable for grass plant in Beijing were selected.