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一、引言楸树(Catalpa bungei C.A.Mey.)是我国独有的速生珍贵用材树种和观赏树种,以往多栽在宫殿、寺院、宅旁和村庄附近,以壮观瞻。在江苏北部云台山区分布居多,常以纯林或与阔叶树:黄连木、枫香、栎类、苦楝、黄檀、臭椿等混交或散生于竹林之中。树高30米,胸径60—200厘米,树冠窄长,呈尖塔形,树干通直,花繁而美丽,材质优良,栽培历史悠久,早在三千多年前就有关于楸树的记载。
I. Introduction Catalpa bungei C.A.Mey. Is China’s unique species of fast-growing rare timber and ornamental tree species, in the past planted more in the palace, temples, houses and near the village to spectacular looking. Yuntai Mountain in northern Jiangsu are mostly distributed, often in pure forests or broadleaf trees: Pistacia, Liquidambar, oak, Melia, Dalbergia, Ailanthus altissima mixed or scattered in the bamboo forest. Tree height 30 meters, diameter 60-200 cm, the crown is narrow and long, was a steeple-shaped, straight trunk, flowers and beautiful, good material, cultivation has a long history, as early as 3000 years ago there Catalpa tree records.