基于光照强度探讨珍稀树种华木莲绿化生境的选择﹡

摘要

Sinomanglietia is a protected plant of the first class in China. It is an excellent tree for landscape with the upright trunk and beautiful flower. Light is an important factor influencing the growth of S. glauca. Thus, selecting suitable sites of landscape is a critical issue to apply S. glauca as landscape tree in urban. In this paper, two factors completely random experiment was used to discern the adaptation performance of two seedling size in four habitat types with different light intensity. The results show that S. glauca can be used as landscape trees, but the seedling survival rates and growth were negatively correlated with the light intensity. The seedlings of S. glauca showed good growth in the park and garden, but they grew poorly in the full sun sites such as urban square and streets. As the big size seedlings had higher adaptability than the small size seeding, the big size seedlings should be preferentially used in the greening.%　　华木莲Sinomanglietia glauca是国家I级保护植物，其树干挺直、花朵芳香，是理想的园林绿化树种。光照是影响华木莲生长的重要因子，为此文章试验采用两因素完全随机试验，研究两种规格华木莲绿化苗在四种不同光照强度绿化生境中的适应性表现，结果表明：苗木成活率和生长状况与生境的光照强度密切负相关，公园、小区等半荫生境为华木莲绿化宜植地，而光照强的广场、街道等生境不宜栽植；在适宜生境中，大苗适应能力要稍好于小苗。因此，华木莲可用于公园和小区的绿化，栽植时宜用大苗。