Groundcovers can improve the air quality, and the ability of improvement varies with different groundcovers and planting patterns. This experiment is aimed at evaluating the air clearing capacity of different groundcovers and planting patterns. Firstly, we collect the common groundcovers of the developed countries or regions that cilmate is similar to taiwan, for example, florida state of U.S.A, the Mainland of China, Japan and Singapore. Secondly, we collet the resistance and clearing capacity of air pollutants-SOX, Cl2, O3, NOX, TSP. Lastly, the values of dust and ozone on the park, campus, and the road side were measured. The results indicated that groundcovers had good efficientcies in purifying the air. The dust interception capacity raged between 3.6% and 82.7%, and the clearing capacity of ozone ranged between 14.75% and 94.43%. The higher coverage of groundcovers had better ability to incept dust. It varied with different groundcovers, growth enviroment, planting pattern. The multi-layered, mix-planting, and broader planting belt had better ability of improving the air quality.

ozone,groundcovers,dust interception capacity,dust,air quality