夏季栾树群落冠层结构对其环境温湿度的调节作用

应用生态学报

夏季栾树群落冠层结构对其环境温湿度的调节作用

秦仲^1,2,3,4,李湛东^1,2,3,4**,成仿云^1,2,3,4,沙海峰^5

(¹北京林业大学园林学院, 北京 100083; ²国家花卉工程技术研究中心, 北京 100083; ³花卉种质创新与分子育种北京市重点实验室, 北京 100083; ^4城乡生态环境北京实验室, 北京 100083; ⁵北京市林业种子苗木管理总站, 北京 100029)

出版日期:2015-06-18 发布日期:2015-06-18

Impact of canopy structural characteristics on inner air temperature and relative humidity of Koelreuteria paniculata community in summer.

QIN Zhong^1,2,3,4, LI Zhan-dong^1,2,3,4, CHENG Fang-yun^1,2,3,4, SHA Hai-feng⁵

(¹School of Landscape Architecture, Beijing Forestry University, Beijing 100083, China; ²National Engineering Research Centre for Floriculture, Beijing 100083, China; ³Beijing Key Laboratory of Ornamental Plants Germplasm Innovation and Molecular Breeding, Beijing 100083, China; ⁴Beijing Laboratory of Urban and Rural Ecological Environment, Beijing 100083, China; ⁵Beijing Forestry Seed and Seedling Management Station, Beijing 100029, China)

Online:2015-06-18 Published:2015-06-18

摘要/Abstract

摘要：

为探究栾树群落降温增湿作用与其冠层结构参数的相关性在一天中的变化趋势，于天气晴朗的夏季对北京奥林匹克森林公园栾树群落内部和对照点的温度、相对湿度、群落冠层结构参数进行了测定.结果表明: 栾树群落的郁闭度与叶面积指数、平均叶倾角呈显著相关，且叶面积指数与平均叶倾角呈显著相关；在夏季8:00—18:00，栾树群落可降低空气温度0.43～7.53 ℃，在12:00左右达到降温最大值，增加相对湿度1%～22%，且在10:00左右增湿作用最显著，而在18:00—次日8:00降温增湿效果不明显；9:00—12:00，郁闭度和叶面积指数显著影响栾树群落的降温增湿作用；12:00—14:00，仅郁闭度与降温增湿作用显著相关；直到18:00，郁闭度和叶面积指数共同决定了栾树群落的降温增湿作用.因此，影响栾树群落降温增湿作用的冠层结构参数在一天中随着时间的推移发生变化.

Abstract:

To investigate the diurnal variation of the correlations between the cooling and humidifying effects and canopy structural characteristics of the Koelreuteria paniculata community, the measurements of air temperature, relative humidity, canopy density, leaf area index (LAI) and mean leaf angle (MLA) were performed on calm sunny summer days in the community in Beijing Olympic Forest Park, China. There were significant correlations between the canopy density, LAI and MLA, which affected the cooling and humidifying effects together. The cooling effect reached its maximum by 12:00, whereas the humidifying effect reached its peak at 10:00. Compared with the control open space site, the community appeared to lower the air temperature by 0.43 to 7.53 ℃ and to increase the relative humidity by 1%-22% during the daytime. However, the cooling and humidifying effects seem to be not effective during the night. The canopy density and LAI were better for determining the cooling and humidifying effects from 9:00 to 12:00. However, these effects were largely controlled only by the canopy density from 12:00 to 14:00 and were significantly correlated with the canopy density and LAI afterwards until 18:00.

秦仲1,2,3,4,李湛东1,2,3,4**,成仿云1,2,3,4,沙海峰5. 夏季栾树群落冠层结构对其环境温湿度的调节作用[J]. 应用生态学报.

QIN Zhong1,2,3,4, LI Zhan-dong1,2,3,4, CHENG Fang-yun1,2,3,4, SHA Hai-feng5. Impact of canopy structural characteristics on inner air temperature and relative humidity of Koelreuteria paniculata community in summer.[J]. Chinese Journal of Applied Ecology.