8个灌木树种的降温能力试验

Observations on Cooling Effect of Eight Shrub Species

应用TRM-ZS4型环境梯度监测系统对桂花(Osmanthus fragrans)、红枫(Acer palmatum)、紫竹(Phyllo-stachys nigra)、紫叶李(Prunus cerasifera f.atropurpurea)、紫薇(Lagerstroemia indica)、紫丁香(Syringa oblata)、海桐(Pittosporum tobira)、凤尾竹(Bambusa multiplex cv.fernleaf)8个灌木树种降温能力进行了监测分析。结果表明:灌木树种在3.0 m处的降温能力最能代表树种降温水平,8个灌木树种在3.0 m处的降温效果,呈现了"双峰"变化趋势,11:00点及15:00左右出现降温高峰,这种变化与植物"光合午休"现象较为一致,8个树种分成3个降温类型:桂花和红枫2个树种对环境整体降温能力强,尤其在3.0 m高度层平均降温0.69℃,紫丁香、紫薇、紫叶李、紫竹等4个植物对环境整体降温较强,尤其对底层空间的降温强于其他灌木,海桐、凤尾竹2个植物对空间的降温能力一般。

Observations were conducted on cooling effect of 8 shrub species in Hangzhou,Zhejiang province,with ZS-4.Results showed that cooling effect of shrubs at 3 meter height had typical representativeness,and changed in a bimodal curve,with peaks around 11：00 and 15：00.This change was consistent with midday depression of plant.The observation demonstrated that 8 tested species could be divided into 3 types.Osmanthus fragrans and Acer palma had the strongest cooling effect,0.69℃ lower than air temperature at 3 meter.Syringa oblata,Lagerstroemia indica,Prunus cerasifera f.atropurpurea and Phyllostachys nigra had moderate cooling effect,while Pittosporum tobira and Bambusa multipex cv.fernleaf had weak effect.