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采用植物平均生长指数、频度分析法和聚类分析法,对浙江省桐乡市主要平原绿化树种的应用状况进行分析,并对其进行适应性评价。结果表明:桐乡市绿化乔木和灌木树种分别有41种和25种,使用频度最高的乔木树种是樟(Cinnamomum camphora)和女贞(Ligustrum lucidum),使用频度最高的灌木树种是夹竹桃(Nerium oleander)和红叶石楠(Photinia×fraseri);平均生长指数大于80的乔木和灌木树种分别有31种和22种;使用频率较高、生长较好的乔木树种为樟、水杉(Metasequoia glyptostroboides)、杜英(Elaeocarpus decipiens)等20种;使用频率较高且生长较好的灌木树种为夹竹桃、红叶石楠、金边黄杨和海桐;女贞、雪松、龙柏、杜鹃、金叶女贞等树种使用频率较高但生长较差,建议适当减少这些树种的使用比例,增加使用生长好的适生适地树种。
The average growth index of plants, frequency analysis and cluster analysis were used to analyze the application status of the main plains tree species in Tongxiang, Zhejiang Province, and their adaptability was evaluated. The results showed that there were 41 species and 25 species of shrubs in Tongxiang City, respectively. The tree species with the highest frequency of use were Cinnamomum camphora and Ligustrum lucidum. The shrub species with the highest frequency of use were oleander (Nerium oleander and Photinia × fraseri), 31 species and 22 species of tree and shrub species with average growth index greater than 80, respectively. The tree species with higher frequency of use and better growth were Camphor tree, Metasequoia glyptostroboides, , Elaeocarpus decipiens and so on. The shrub species with higher frequency of use and better growth were oleander, Photinia fraseri, Phoebe bongnongi, Pittosporum, privet, cedar, cypress, rhododendron, The higher frequency of use of trees and other trees, but the poor growth, it is advisable to reduce the proportion of these species and increase the use of well-adapted tree species.