一种定量测定植物BVOCs排放的新方法在北京绿化中的应用

A New Method to Quantitatively Measure Plants' BVOCs Emission and Its Application in Greening of Beijing

文章通过研究创建了一种新方法,即在相同的人工环境条件下测定北京市22种绿化植物单位时间内单位叶面积的生物源可挥发性有机化合物排放量(即"叶BVOCs排放速率"),同时利用叶面积指数(LAI)相关模型对其中12种植物进行单位投影面积的单一种类植物群落叶片BVOCs的年排放量(即"群落BVOCs年排放量")进行估算。结果表明,北京市22种植物中迎春花、垂柳叶片的BVOCs排放速率最高,分别达到32.0、21.0μg/cm^2/h,西府海棠、碧桃叶片的BVOCs排放速率最低,分别为2.55、2.60μg/cm^2/h。而12种园林植物BVOCs年排放量较高的为紫叶李、棣棠花和银杏,分别为753、649和330g/m2/y群落投影面积。

A new method was established to measure biogenic volatile organic compounds（BVOCs）emission rate per leaf area of 22 species greening plants in Beijing under the same artificial environmental conditions.Afterwards,annual BVOCs emissions of 12 out of 22 investigated plant species per projected area was estimated using the relevant model of leaf area index（LAI）.The result shows that BVOCs emission rate of Jasminum nudiflorum（32.0μg/cm^2/h）and Salix babylonica（21.0μg/cm^2/h）are higher than those of the other species.Instead,leaves of Malus micromalu（2.55μg/cm^2/h）and Prunus persica（2.60μg/cm^2/h）have the lowest emission rates of BVOCs.In addition,the annual BVOCs emission for the community of Prunus cerasifera f.atropurpurea,Kerria japonica and Ginkgo biloba（753,649,330g/m2/y plant community＇s projected area）are higher than those of the other plant species.