Abstract: Shelterbelt had important effect not only on wind erosion but also on the dust deposition at surface layer. To identify the effect of shelterbelt with different porosity (β) on dust deposition, the dust samples at 0.5 m and 3 m height around Populus alba shelterbelt were collected. Results indicated that β was the key factor to control the dust deposition. When β>0.47, the shelterbelt had no significant effect on dust deposition, and the deposition rates at 0.5 m height were higher than 3 m. The variation of deposition at 0.5 m height was considerable but relative steady at 3 m height. When β decreased from 0.47 to 0.2, the shelterbelt had significant effect on dust deposition, and the two heights had similar dust deposition pattern, and the deposition gap between two heights had decreased. Besides. There were high dustfall zones at the leeward of shelterbelt at both the two heights, but the high dustfall zone at 0.5 m height lagged behind the 3 m height. In conclusion, the shelterbelt with medium porosity (0.2-0.47) can affect the horizontal and vertical distribution of dust deposition, resulting in the leeward of shelterbelt had a high dust deposition zone. The shelterbelt can enhance the dust deposition at 3 m height to reduce the dustfall gap between 0.5 m and 3 m. In view of the high dustfall zone at the leeward of the shelterbelt, the dust-vulnerable plants (e.g. cotton, winter wheat) should be planted far away from the near-leeward of the shelterbelt.

Key words: shelterbelt, dust deposition, porosity, Cele