青海大学两种植物群落秋季降温增湿作用研究

Study on cooling and humidification effects of two plant communities in autumn in Qinghai University

为了解不同植物群落对青海大学小环境气候的影响,本研究以青海大学校园内两种常见植物群落,行道树和林区为样本,探讨其降温增湿作用的时空变化规律。结果表明:(1)两种植物群落与对照点的平均温度日变化曲线相似,均呈现单峰型变化,综合比较后发现行道树区植物群落降温作用更明显,而林区植物群落较弱。(2)两种植物群落与对照点的平均湿度日变化曲线均呈明显“U”形,多重比较后发现两种植物群落与对照点之间平均相对湿度均存在显著差异。(3)两种植物群落对周边气候的显著影响主要集中在下午(14:00~20:00)这一时段。总体来说,两种植物群落均呈现明显的降温增湿作用,但相对比行道树植物群落的降温增湿效率略优于林区植物群落。本研究可为青海大学的绿化工作提供参考。

In order to make clear the influence of different plant communities on the microclimate of Qinghai University,this paper takes two common plant communities,street trees and forest area as samples to explore the temporal and spatial variation of cooling and humidification.Following are the three conclusions of this paper.Firstly,the curve of diurnal variation of average temperature of the two plant communities is similar to that of the control point with a single curve.In comparison,the cooling effect of plant community of street trees is more obvious than that of forest area.Secondly,the curve of diurnal variation of average humidity between the two plant communities and the control point is U-shaped.It is found that there are significant differences in average relative humidity between the two plant communities and the control point after comparisons.Lastly,the significant impact of the two plant communities on the surrounding climate is mainly concentrated in the period from 14 pm to 20 pm.Generally speaking,although the two plant communities show an obvious cooling and humidification effects,the effect of street trees is slightly better than that of forest area.This study can provide reference for greening work of Qinghai University.