行道树有滞尘隔噪,遮荫护路、美化城乡的功能,自古以来就受到人们的重视,把行道树作为绿化的重要组成部分。《国语》中有“周制有之日,列树以表道,立鄙舍以守道路”的记载。前秦符坚曾在阿房城植桐树万株,又在都城长安大种槐树,当时人们称赞道:“长安大街,两边树槐,下走朱轮,上有弯栖。从中足以窥见当时行道树的盛况 Road trees have dust and noise isolation, shade protection, beautification of urban and rural functions, since ancient times by people’s attention, the tree as an important part of green. ”Mandarin“ in the ”system of the day there, the list of trees to the table, Li Shijiao to keep the road“ record. Former Qin Fu Jian once planted trees in Afangcheng ten thousand trees, but also in the capital Chang’an great variety Ash tree, when people praised: ”Chang’an Avenue, both sides Huhuai, go round Zhu round, there are curved habitat. The grand occasion of the tree at that time