Abstract:

Plots of field experiment have been established in light, medium, and heavy saline-alkaline soil, as well as soda salinized soil on Bohai bay coast land during 1989-1994. Tamarix chinensis trees had been planted as a pioneer tree species in heavy saline soil to protect dams from tide for 5 years. The content of soil salt in the dam of Dawa county, Panjing city declined from 1% to 0.4%. Elaeagnus angustifolia can be planted as pioneer tree species to resist alkaline and flood in Linghai city where the soil is solontz (pH is about 10). In the medium saline-alkaline soil, the tree height of Populus popularis and Salix No. 109 mixed with Amorpha fruticosa increased 3% and 10% respectively, D B H increased 12% and 25% respectively, comparing with those in a pure stand. In the light saline alkaline soil, Populus popularis, Fraxinus velutina, Salix No. 109, and Robinia pseudoacia can be planted so as to establish a fast-growing and high-yield plantation.

Key words: Coastal salinized soil, Afforestation, Soil amelioration