[Objective] The benefits from two kinds of sand fixing shrub

Haloxylon ammodendron and H. ammodendron plus imitative shrub with regard to wind velocity

transported sand volume and transported sand diameter were illustrated to provide references for functional recovery and reestablishment of windbreak and sand fixation forest in arid region.[Methods] Wind speed

transported sand and sand diameter were observed simultaneously in stands of bare sandy land

H. ammodendron shrub and H. ammodendron plus imitative shrub. Their variations caused by the two shrubs were analyzed.[Results] The average reduction rate of wind velocity was 61.35% at the height of 20 cm when wind velocity was 3.0 to 8.9 m/s. The sand transporting quantities of H. ammodendron shrub and bare sandy land were 1.5 and 4.13 times of H. ammodendron plus imitative shrub. The sand transport rates of H. ammodendron forest and H. ammodendron plus imitative shrub both reduced with the height by exponential function. The wind-transported volume of sand and sand diameter grade shifted by wind in the two shrubs was both greater under 10 cm shrub height.[Conclusion] As resulted from the change of spatial distribution of wind-sand flux

the content of fine sandy grain (diameter ≤ 0.02 mm) was reduced

it was mainly concentrated in lower layer.