.3 Kinds Of Wild Plants Greening Of Applied Ecology, Performance Study

In order to study the application of three wild groundcover plants:Viola yedoensis Makino,Plantago asiatica L.Potentilla flagellaris Willd ex Schlecht in the city virescence,the traffic tolerance,shade tolerance of them and response of Viola yedoensis Makino to mowing under shading were analysed with physiological and ecological indics,photosynthetic parameters and chlorophyll fluorescence parameters. The competitiveness was measured in the natural herbs community that developed from the degradated artificial turf under different water conditions by using perturbation experiment and the competition between Viola yedoensis Makino and Lolium perenne was studied under different water conditions.The results showed that their traffic tolerance order was as follows:Plantago asiatica L.＞Viola yedoensis Makino＞Potentilla flagellaris Willd ex Schlecht.Plantago asiatica L.is traffic tolerance because of its high cellulose content,Viola yedoensis Makino is traffic tolerance because of its rapid recovery after traffic.The Fv/Fm of Plantago asiatica L.did not change significantly(p＜0.05)under shading,that of Viola yedoensis Makino increased 2.02%compared with the control under light shading levels.As shading stress increased,the light saturation point and the light compensation point of the two plants decreased.The rate of decline in Viola yedoensis Makino was lower than Plantago asiatica L.By Comprehensive analysis,Viola yedoensis Makino is a strong shade-tolerant plant.It could grow well under the condition that light transmittance rate was 50.00%and grew normally under 25.00%.Compared with Viola yedoensis Makino,Plantago asiatica L.was poor shade-tolerant.It could not grow well under the condition that light transmittance rate was 25.00%.Under the shade conditions,mowing increased the number of leaves per plant of Viola yedoensis Makino,decreased the leaf area,aboveground biomass,leaf weight ratio of Viola yedoensis Makino,lowered chlorophyll content,total soluble sugar content and MDA, reduced Fv/Fm,Fv'/Fm' and qN and increased qP.But mowing had little impact on the net photosynthetic rate of Viola yedoensis Makino.Under the same water conditions,the competitiveness of Potentilla flagellaris Willd ex Schlecht is significantly(p＜0.05)higher than that of Viola yedoensis Makino and Planlago asiatica L.Their competitiveness was positively related to the important values in community.Viola yedoensis Makino is pressure-resistant plant and Lolium perenne is competitive plant.With high soil moisture(T₁),the RCC of Viola yedoensis Makino to Lolium perenne is 0.2122(MI₁)and 0.3064(MI₂),indicating competitiveness of Viola yedoensis Makino is poorer than that of Lolium perenne.With low soil moisture (T₂),the RCC of Viola yedoensis Makino to Lolium perenne is 1.3732(MI₁)and 1.4984(MI₂),indicating competitiveness of Viola yedoensis Makino is stronger than that of Lolium perenne.