浙江慈溪乡土树种的资源特点与利用展望

Studies on Characteristics of Resources and Utilization Prospects of Indigenous Trees in Cixi of Zhejiang

经外业调查和研究,浙江慈溪有乡土树种464种,隶属于81科224属。科的组成以小型科(小科和极小科)居多,共占总科数的83.95%;种类多集中于少数大科和中等科,两类共占总种数的50.86%。属的组成以极小属为主,占总属数的56.70%。生长型以落叶为主,有281种,包括13种亚灌木;乔木和直立灌木共373种,藤本91种;竹类22种。在178属自然分布(野生)的乡土树种中,地理分布区类型主要有泛热带分布型、北温带分布型、东亚分布型及东亚和北美间断分布型等4类,它们共占总属数的66.48%。分析了其资源特点。对绿化观赏、药用、食用和珍贵用材等乡土树种进行了种类统计,并作了利用展望。

On the basis of the field investigations and studies of species,there were 464 species of indigenous trees in Cixi City of Zhejiang Province.They belonged to 81 families,224 genera.The composition of the family was mostly small typal families,i.e.,small families and very small families were 83.95%of the total.Species were concentrated in a few large and medium-sized families.And both of them were 50.86%of the total.The composition of the genus was mostly very small genera,and it was 56.70%of the total.Growth type of the indigenous trees was mostly deciduous,and it was 281 species,including 13 species of subshrubs.Both of trees and erect shrubs were 373 species,in the same time,woody vines were 91 species.Bamboo plants were 22 species.Amang of the 178 genera of natural(wild)distribution indigenous trees,the geographic distribution types were mothly Pantropic,North Temperate,East Asia,East Asia and North America disjuncted.And total of the four types was 66.48%.The characteristics of resources were analysed.Statistics of numbers of species were made in afforestation,green and ornamental,medicinal,food and precious timber trees.Then,their utilization prospects were carried out.