Abstract: The practices of tree species selection, soil amelioration and afforestation engineering on saline alkalized soils of Liaohe Delta show that Populus liaoningensis, Populus zhonglinensis 46 and Populus popularis can be planted on main canals where soil salt content is lower than0.3%. After soil amelioration, Robinia pseudoacacia, Ulmus pumila can be planted on sea banks where soil salt content is 0.4%, Fraxinus velutina can be planted on both sides of oil-field roads where soil salt content is 0.52～0.73%, and Tamarix chinensis can be planted on prevent tide dikes where soil salt content is 0.9%.

Key words: Saline-alkalized soil, Protection forest, Tree species selection, Afforestation engineering