Abstract: In order to understand environmental factor changes of Sophora japonica woodland and its shrub combination, the temperature, humidity, wind speed and light intensity of three kinds of plants combinatorial woodland were studied, including Sophora japonica forestland, Triloba woodland and the combinatorial woodland of Sophora japonica and Triloba, contrasted to the cleaning places near each woodlands. The results show that the temperature in arbor woodland changed a lot, while in combinatorial woodland changed a bit. And the wind speed in arbor woodland was the same as cleaning places, and reduced in both of the combination woodland and shrubs woodland, it was the lowest especially in shrub lands. The humidity in woodland changed slightly, the relative humidity increased by 5% in arbor woodland and decreased by 2% in combinatorial woodlands, while there were no significant changes in shrub lands. The light intensity reduced by 73% in arbor woodland, and reduced 19% in the combinatorial woodlands and 4.7% in shrub lands. In short, the temperature in combinatorial woodland changed a little, wind speed and humidity may be reduced and high light intensity can be maintained, and the ecological indicators in combinatorial woodland of Sophora japonica and Triloba portfolio allocation are the best.

Key words: saline-alkali soil, ecological forest, allocation, environmental factor, arbor and shrub combination