Planting six tree species on soda-saline-alkali soil

摘要

Populus simonigra, Salix matsudana, Ulmus pumila, Populus nigra, Acer negundo, Fraxinus mand- shurica, Tamarix chinensis, Hippophae rhammoides, Syriga onlata were planted on the soda-saline-alkali. The soil had pH 8.5～9.6, salinity 0.1/100～0.3/100, sodiumionized ratio 16/100～51/100 and normality ratio of saline base Na~+ /(Ca~++ + Mg~++)>4. Populus simonigra grows very well on the all kinds of soda-saline-alkali soils except on the alkali sport with the worst soil condition and showed a high wood increments and biomass. After 9 a, the volume can reach 100 m~3/hm~2, and the above-ground biomass can reach 28.7 t/hm~2.