当前位置: 首页 > 文章 > 绿色屋顶植物景天属与水苏降温能力对比研究 河南农业科学 2014,43 (2) 112-115
Position: Home > Articles > Comparison of Cooling Ability between Stachys byzantinaand Sedumfor Roof Greening Journal of Henan Agricultural Sciences 2014,43 (2) 112-115

绿色屋顶植物景天属与水苏降温能力对比研究

作  者:
李宇
单  位:
河南省林业科学研究院
关键词:
景天属;水苏;基质含水量;表面净太阳辐射吸收值;表面温度;基质温度;空气温度
摘  要:
为研究具有不同叶片形态的屋顶植物的降温能力,以景天属植物、水苏和裸土为供试材料,在不同天气和水分条件下,分析景天属植物、水苏和裸土的基质含水量、表面净太阳辐射吸收值、表面温度、基质温度和空气温度5组参数。结果表明:在同等天气和水分条件下,叶形较宽且密被白色绒毛的水苏有较高的基质含水量;较少的表面净太阳辐射吸收值,在晴天、阴天的表面净太阳辐射吸收值分别为523.64、151.56W/m2,与景天属植物和裸土差异显著(P<0.05);较低的表面温度,晴天旱处理和正常浇水处理的水苏分别比同等条件的景天属植物降低12.0℃和4.2℃,阴天旱处理的水苏比景天属植物低3.1℃,但正常浇水的景天属植物比水苏低2.5℃;较低的基质温度,正常浇水和旱处理条件下,水苏的基质温度分别为20.24℃和24.07℃,与景天属植物和裸土差异明显;较低的空气温度(高于表面100mm处),正常浇水处理和旱处理水苏的空气温度分别为24.82、25.14℃。正常浇水的景天属植物的入风口空气温度和出风口空气温度差异明显,其平均空气温度差为1.21℃。由此可见,水苏有较好的降温能力,而景天属植物在正常水分条件下有利于上层空气流动。
译  名:
Comparison of Cooling Ability between Stachys byzantinaand Sedumfor Roof Greening
作  者:
LI Yu;Henan Academy of Forestry;
关键词:
Sedum;;Stachys byzantine;;substrate moisture content;;absorption value of net solar radiation;;surface temperature;;substrate temperature;;air temperature
摘  要:
In order to investigate the cooling ability of different roof greening plants,the performance of Stachys byzantina,Sedumand bare soil was analyzed with 5aspects(substrate moisture content,absorption value of net solar radiation,surface temperature,substrate temperature and aerial temperature).The results showed that compared with Sedumand bare soil,there was higher soil moisture content for Stachys byzantine;less absorption value of net solar radiation with 523.64W/m2 on sunny day and 151.56W/m2 on cloudy day respectively;lower surface temperature,which were 12.0℃and 4.2℃lower for rain-fed and irrigated Stachys byzantine on sunny day,while which was 3.1℃lower for rain-fed Stachys byzantine on cloudy day;lower substrate temperature,which were 20.24 ℃ and 24.07 ℃for irrigated and rain-fed Stachys byzantine respectively;lower air temperature,the air temperatures 100mm above the canopy of irrigated and rain-fed Stachys byzantine were 24.82 ℃ and 25.14 ℃.There was significant difference in air temperature between incoming side and outgoing side for Sedum,and the difference in average temperature was 1.21 ℃.Therefore Stdchys byzantina provided a better cooling effect,Sedum could have a role in moving air above them under normal condition.

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