桂花是我国重要的园林树种。前几年有些筛选抗大气污染树种的研究报导认为桂花对二氧化硫,氟化氢,氯气和汞蒸气等均有较强的抗性,因而一些工厂和工业区的公园便开始大量种植桂花。但后来发现许多地区的桂花只长叶片而不能开花,仅能起到绿化的作用,而不能发挥其美化、香化的效果。 Osmanthus fragrans is an important garden tree species in our country. In previous years, some studies on screening anti-air pollution species have reported that osmanthus has strong resistance to sulfur dioxide, hydrogen fluoride, chlorine and mercury vapor, etc., and some factories and industrial parks have begun to plan large-scale osmanthus cultivation. But later found that in many parts of the osmanthus only long leaves and can not blossom, can only play the role of green, but can not play its beautification, incense effect.