Urban courtyard afforestation configuration mode for reducing PM 2.5

Abstract

The invention discloses an urban courtyard afforestation configuration mode for reducing PM 2.5, which comprises the following steps: in the first ten-day period of March, according to the plant configuration standard, digging plant pits and applying cake fertilizer or compound fertilizer in the plant pits; at the front courtyard, adopting the configuration mode of planting zelkova schneiderianas, southern magnolias, sweet-scented osmanthus trees, crape myrtle trees, red maples, pomegranate trees, rhododendron trees, loropetalum chinense var. rubrums and ground cover plants (gardenia and radix ophiopogonis); at the rear courtyard, adopting the configuration mode of planting hackberries, sweet-scented osmanthus trees, Chinese redbud, euonvmus japonicus cv.aureo-ma, camellia and ground cover plants (zephyranthes candida); on the east and west sides of the courtyard, adopting the three-dimensional configuration mode of planting koelreuteria paniculata, banana shrub, loropetalum chinense var. rubrums, pittosporum tobira and ground cover plants (gardenia and zoysia matrella). According to the invention, based on the spatial distribution pattern of urban PM 2.5, the afforestation position effect and the arbor and shrub multi-layer configuration effect of urban communities are strengthened, and the PM 2.5 exhausted by motor vehicles and heavy metal pollutants in the communities are reduced to the greatest degree. With adoption of the urban courtyard afforestation configuration mode disclosed by the invention, the concentration of the PM 2.5 can be decreased for 1.86 times as compared with that of adopting the conventional afforestation mode.

Description

[0001] The invention belongs to the field of garden greening and relates to a garden greening configuration mode for reducing PM2.5. Background technique [0002] PM2.5 refers to particulate matter in the ambient air with an equivalent diameter less than and equal to 2.5 microns, also known as particulate matter that can enter the lungs. The main source of PM2.5 is the residues emitted by combustion in the process of daily power generation, vehicle exhaust, and industrial production emissions. Although PM2.5 is only a small component in the earth's atmosphere, it has an important impact on air quality and visibility. Compared with coarser atmospheric particles, PM2.5 has a small particle size, is rich in a large amount of toxic and harmful substances, and has a long residence time in the atmosphere and a long transportation distance. Gas exchange, triggering diseases including asthma, bronchitis and cardiovascular disease. Therefore, it has a great impact on human health and...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a garden greening configuration mode that reduces PM2.5, so as to overcome the shortcomings of low dust retention and poor effect of reducing PM2.5 caused by traditional planting modes (tree shrub, grass shrub)