Urban green land species shade tolerance evaluation method and urban green land species selection method

Abstract

The invention relates to an urban green land species shade tolerance evaluation method and an urban green land species selection method, and the method comprises the steps: respectively measuring 11 related parameters of species shade tolerance: the apparent quantum efficiency, the dark respiration rate, a light saturation point, a light compensation point, the net photosynthetic rate, the stomatal conductance, the intercellular carbon dioxide concentration, the transpiration rate, stomatal restriction, a chlorophyll content relative value of the leaves and the specific leaf area of the leaves; performing principal component analysis on the parameters, and calculating a principal component score, a membership function value and a comprehensive index weight to obtain a comprehensive shade tolerance evaluation index D value; and calculating shade tolerance comprehensive evaluation indexes of any two or more species, the shade tolerance of the species with a high comprehensive shade tolerance evaluation index D value being higher than that of the species with a low comprehensive shade tolerance evaluation index D. According to the method, the shade tolerance of common green land species is comprehensively evaluated, and a technical method is provided for screening of urban green land species.

Description

technical field [0001] The invention belongs to the field of landscaping species screening, in particular to a method for evaluating the shade tolerance of urban green space species and a method for selecting urban green space species. Background technique [0002] Urban green space is the core of urban ecological environment construction, plays an irreplaceable role in improving urban ecological environment, and has important ecological, cultural and social values. Urban greening species are an important part of the urban green space system. During the construction of urban green space, the ecological adaptability of the species that make up the green space is the key factor that determines the adaptability of the species in the entire green space. Selecting species suitable for the growth of urban green space is of great significance to improving the urban ecological environment, enhancing the ability of urban green space to resist natural disasters, improving urban livabi...

AI Technical Summary

Problems solved by technology

However, in the prior art, there is no model and method that can comprehensively and objectively evaluate the shade tolerance of urban green space species.

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