摘要
研究选取五种常见园林绿化树种:油松(Pinus tabulaeformis)、圆柏(Sabina chinensi)、龙爪槐(Sophora japonica Var.pendula)、丁香(Syringa oblate)、红瑞木(Cornus alba)作为研究对象,利用PC-2太阳辐射记录仪测定树木遮阴及全日照条件下UVB辐射强度,计算其UVB屏蔽率,并对五种园林树种UVB屏蔽效应进行初步显著性分析。结果表明:(1)各树种均对UVB产生消减作用,但消减程度有所不同。各树种遮蔽下UVB辐射量最大值均出现在13时左右。(2)各树种遮蔽下的UVB辐射日进程呈现无规律性(3)除圆柏以外,其他园林树种对UVB辐射有明显的消减作用。通过方差分析,五种园林有绿化树种屏蔽效应显著,其屏蔽效应依次为:红瑞木97.9%、丁香80.6%、油松80.5%、龙爪槐53.9%、圆柏43.5%。红瑞木与圆柏差异性最大,达到54.422。油松与丁香差异性最小,为0.878。
Five familiar species of garden plants including Pinus tabulaeformis,Sabina chinensi,Sophora japonica var.pendula,Syringa oblate and Cornus alba were chosen as research objects.By using PC-2 solar radiation sensor,UVB radiation values were measured in shade conditions and in sunshine,shielding efficiency of the examined tree species to UVB was calculated.Using analysis of variance method,the screening effect of 5 garden plants was concluded.Results showed that UVB radiation values were lowered in shadow of 5 garden plants,but the extents were different.The max UVB radiation value was at the 13h.UVB diurnal course inside shade of plants was ruleless.Distinct shielding efficiency was achieved in other familiar species of garden plants,except Sabina chinensi.Screening effects was Cornus alba 97.9%,Syringa oblate 80.6%,Pinus tabulaeformis 80.5%,Sophora japonica Var.pendula 53.9% and Sabina chinensi 43.5%.There was significantly different between Cornus alba and Sabina chinensi,with the difference of 54.422.There was not distinct different between Pinus tabulaeformis and Syringa oblate,with the difference as 0.878.
出处
《环境科学与技术》
CAS
CSCD
北大核心
2011年第4期31-34,共4页
Environmental Science & Technology
基金
内蒙古自然科学基金重点项目(20080404zd10)
