Wind resistance of 25 landscape tree species in coastal area of Shanghai

  Objective  Typhoon is one of the main meteorological disasters in the east coast of China. The frequency and intensity of wind damage caused by climate change have been increasing in recent years. The study on wind resistance of landscape tree species is directly related to the ecological stability of urban green space system.

  Method  The comprehensive evaluation was taken for the wind resistance of 25 tree species by the static tension test, morphological stability evaluation, timber property determination and soil compactness measurement.

  Result  There was a logarithmic function relationship between the tensile torque and the tensile angle of each species; the stability index decreased with the increase of tree height, crown width/crown height, canopy size and asymmetry; there was a linear relationship between the compressive strength and the bending strength of tree cores.

  Conclusion  Finally, 25 species were categorized into two groups: the first was a rigid tree with a large static tension and a small bending angle like Magnolia grandiflora, Firmiana simplex, Catalpa bungei ‘Jinsi’ and Liquidambar formosana. Another group was toughness trees with small static tension and large bending angle like Ginkgo biloba.