According to the located observation for the artificial Haloxylon ammodendron forest in Northwest Xinjiang Wei Autonomous Region

we analyzed its ecological value and economic functions.Results indicate that the air current resistance of forest belt to close stratum may increase 1.2～6.6 times.Moreover

the wider the belt

the more notable the effect.The 130 m wide forest belt can block and intercept about 95 % of drift-sand.The observation shows that the better width of forest belt is more than 130 m in order to make drift-sand to be blocked and intercepted effectively in the oasis periphery.The inner temperature of forest belt has the closer correlations with its width and plant coverage degree

so there is an important significance to improve its inner air humidity by keeping forest belt with a certain coverage degree and width.