Abstract:

Twenty-three urban accessory greenlands of branches with 8 464 woody landscape plants belonging to 42 species(cultivars/variations etc.) in Shendong mining area were investigated, and growth conditions, function benefits (dust retention, CO₂ fixation, O₂ release, air temperature reduction, etc.) and water transpirations of all different kinds of woody landscape plants were measured. Simultaneously, their health grades, ecological adaptabilities (drought tolerance, wind drift sand tolerance, etc.) and scenic beauty were evaluated. In addition, other relevant indexes such as relative abundance were also analyzed. Finally, combined with those indexes mentioned above, preferential selection order of 42 kinds of woody landscape plants were comprehensively appraised by means of Gray Relation Analysis. The results were as follows: in urban accessory greenlands of branches in semi-arid areas such as Shendong mining area, Populus alba var. pyramidalis, Salix babylonica, Populus simonii, Sophora japonica, Sophora japonica f. pendula, Salix matsudana f. tortuosa, etc. should be selected preferentially for deciduous and broad-leaved arbors, and Syringa oblata, Rosa xanthina, Amorpha fruticosa, Sorbaria kirilowii etc. for shrubs; evergreen conifers should be selected in the order of Sabina chinensis>Picea asperata>Pinus sylvestris var. mongolica>Juniperus rigida>Pinus tabulaeformis>Platycladus orientalis; While Ulmus pumila, Tamarix chinensis and Berberis amurensis should be lastly considered.

Key words: semi-arid areas, Shendong mining area, urban accessory greenlands of branches, woody landscape plants selection, Gray Relation Analysis