杭州城市住宅小区绿化植物区系研究

2007年5月,在杭州城市住宅小区中选择不同建设年代和风格、有代表性的13个小区进行实地典型调查,结果为:有绿化植物67科119属145种,其中木本植物119种,占总种数的82.1%,乡土植物84种,占总种数的57.9%.在科的区系组成中,世界分布、热带-亚热带分布和温带分布分别占26.87%、44.78%和26.86%,中国特有分布科为银杏科.在属的区系组成中,世界分布、热带-亚热带分布、温带分布和中国特有分布分别占2.52%、38.65%、55.47%和3.36%.分析表明,杭州城市住宅小区绿化植物的多样性偏低,乡土植物比例偏少,热带成分相对偏高而温带成分相对偏低.

Study on the Flora of Urban Residential Districts'Afforestation in Hanzhou

The 13 typical residential districts were selected from different building ages in Hanzhou in May of 2007 for on-the-spot survey.The results revealed that there were 145 species of afforesting plants,subordinating to 119 genera and 67 families,in which there were 119 species of woody plant,accounting for 82.1% of the total,and 84 species of indigenous plants,accounting for 57.9% of the total.In the composition of family flora,the world distribution species,tropical-subtropical distribution species and temperate zone distribution species account for 26.87%,44.78% and 26.86% respectively,and Ginkgoaceae as China peculiar family.In the composition of genera flora,the world distribution,tropical-subtropical distribution,temperate distribution and China peculiar distribution were 2.52%,38.65%,55.47% and 3.36% in order.The results showed that the diversity of afforesting plant was inclined to be low,the proportion of indigenous plant was small,tropical elements were relative high but temperate elements were relative low.