嘉兴市区古树名木资源及特征分析

根据普查数据,从树种、树龄、树高、胸径、生境、区系构成等方面分析了嘉兴市区古树名木的特点。结果表明:嘉兴市区共有古树213株,分属19科23属,其中国家一级保护古树9株,二级保护古树15株。主要分布在寺院,占总数量的46.95%;其次为公园,占16.90%。以樟树数量较多,占总株数的40.37%;其次为银杏,占23.00%。树龄主要集中在100～199a区段,树高主要集中在10～20m区段,胸径主要集中在50～100cm区段。有9个属分布区类型,其中热带分布型有10个属,温带分布型有11个属,体现了从亚热带向温带过渡的性质。

Resources and Characteristics of Valuable Old-Growth Trees In Jiaxing City

According to the census data,characteristics of valuable old-growth trees were analyzed in Jiaxing City from species,age,height,DBH,habitat,floristic composition.Jiaxing city has a total of 213 old trees,nameless wood,belonging to 19 families,23 genera,in which the National GradeⅠprotect valuable old-growth trees : 9 trees,secondary protect valuable old-growth trees:15 trees;mainly distributed in the monasteries,the trees constitute 46.95% of total number;followed by parks,the trees constitute 16.90% of total number.The number of Cinnamomum camphora are large,accounting for 40.37% of the total number;followed by Ginkgo biloba,accounting for 23.00% of the total number.Age is mainly in the 100 to 199 a section,and height of the tree is mainly concentrated in the 10 to 20 m section;DBH is mainly concentrated in the 50 to 100 cm section.Nine genera belong to distribution pattern,in which tropical distribution pattern have 10 genera,and temperate distribution pattern have 11 genera;it reflects the nature of the transition from subtropical to temperate zone.