A method for screening plant allocation patterns with strong dust retention ability of urban forest

Abstract

The invention discloses a plant configuration mode screening method with strong dust retention ability of urban forest, which comprises the following steps: according to different air pollution degree, dividing sample plots, respectively selecting landscape plant configuration as analysis object in each plot; Collecting the leaves of each plant configuration respectively; measuring PM (10), PM (2.5) adsorption capacity per unit leaf area of each plant;. Determining the dust retention per unit leaf area of each plant; establishing a comprehensive evaluation index system based on dust retentioncapacity, forest landscape, environmental adaptability and growth characteristics to sort the dust retention capacity of plants in different plots. Wherein the evaluation index of dust retention capacity is The adsorption capacity of PM (10), PM (2.5) and dust retention capacity of unit leaf area were measured by step S3-S_4. A multi-level comprehensive evaluation index system was established according to the different pollution degree of the sample plots, and the dust retention ability of the tested plants was sorted by using the regional and analytic hierarchy process (AHP). The evaluation results were highly reliable and pertinent, which provided guidance for urban forest construction and air pollution prevention and control.

Description

technical field [0001] The invention relates to the technical field of air pollution prevention and control, in particular to a method for screening plant configuration patterns with strong dust retention capabilities in urban forests. Background technique [0002] At present, many countries are adopting the method of afforestation to reduce air pollution, and the effect of vegetation on reducing the concentration of fine particles in the air is very obvious. As an important part of the urban ecological environment, urban landscaping plants effectively retain particulate matter in the air on the surface of vegetation by reducing wind speed, blocking and absorbing particulate matter, so as to reduce the concentration of particulate matter in the atmosphere and purify the air. [0003] Scholars at home and abroad have conducted a series of research reports on the ability of urban vegetation to retain atmospheric PM and the benefits of dust retention. A study in Shanghai found...

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Problems solved by technology

[0004] Nevertheless, most of the existing studies focus on the total amount or particle size composition of residual PM on leaves, and it is difficult to combine theoretical research with the actual needs of urban forest ecological construction. The screening method of plant configuration mode is of great significance to reduce urban atmospheric particulate matter pollution and improve air quality, and is conducive to maximizing the purification function of forest ecosystems on the atmospheric environment