绵阳城市植物分布格局及多样性研究

通过对绵阳市区各类绿地植物的调查,分析了城市绿地植物的种类构成和植物多样性特征。结果表明,绵阳市区植物种类丰富,共有植物72科,167个属,480种。其中人工栽培植物占49.6%,野生植物占50.4%;乡土植物占64.5%,外来植物占35.5%。乡土植物中的乡土栽培植物仅占14.1%,比例过低,缺乏地方风貌特色。绵阳城市各功能区的植物丰富度以草本植物最高,其次是灌木植物,乔木植物最低。植物多样性指数在乔木层、灌木层和草本层的多样性指数都是其他绿地最高。绵阳植物开花集中在春夏季,秋冬季节开花植物少,花色比例是红色∶白色∶黄色∶蓝紫色=8∶7∶3∶1。

Research on Distribution Pattern of Plant Species and the Diversity in Mianyang City

By investigating Mianyang urban plant based on urban functional zones. including public park;attached green space;productive plantation area and other green area.The result showed there were 480 species plants which belonged to 167 genera and 72 families.Among them,there were 238 species cultural plants and 150 species wilding which accounted for 49.6% and 50.4% of total urban plant species separately;there were 309 species Mianyang native plants and 171 species were introduced from other area.However,the low ratios of the area of native cultural plants resulted in the comedown of local plant characteristic.Other green area had the highest species diversity in arbor and shrub and herb,by comparison,productive plantation area had the lowest species diversity.The herb had the highest Species richness index in all of green area.Most of plants bloomed in spring and summer.According to the statistic of flower color,red∶white yellow∶blue and purple=8∶7∶3∶1