北京平原地区园林绿化中存在的主要问题为:景观植物单一、缺少层次,地被植物种类不够丰富;景观季相色彩雷同、缺少新意;高郁闭度林下地被植物种类稀少,林下斑秃现象突出等。为解决问题,以丰富平原地区林下地被植物种类为目标,对引进的10个耐寒蕨品种开展抗旱性、耐阴性、耐寒性等适应性研究试验。通过试验,筛选出适宜北京平原地区林下种植的墨西哥蕨、巴纳斯蕨、日本彩叶蕨、荚果蕨等4个品种;总结出耐寒蕨引进栽培适应性的评价指标及评价方法。引进栽培新品种耐寒蕨,不仅丰富了林下地被植物的种类,也可为首都高质量园林景观建设提供更多选择。

The main problems existing in Beijing plain area are as follows:the landscape of uniform tree species is lack of vertical layer especially in ground cover plants,let alone pay attention to species diversity and density,as well as seasonal colors.There are few ground cover species in high canopy forests,and the phenomenon of understory blank is prominent.To enrich the diversity of ground cover plants under forests,10 cold resistant fern varieties were introduced to carry out adaptability research tests such as cold tolerance,negative tolerance and cold tolerance. Four varieties of fern,including Mexicans fern,Banas fern,Japanese color leaf fern and Ostrich fern,suitable for understory planting in Beijing Plain were selected.The evaluation indexes and methods of the adaptability of the introduction and cultivation of cold resistant fern were summarized. The screening and evaluation experiment of cold resistant fern enrich the species of ground cover plants,and provide more choices for high-quality landscape construction of the capital.