Abstract: In this study,two shrub species,i.e.Oxytropis aciphylla and Caragana microphylla,and their wind-shadow dunes were taken as the study objects to analyze the relationship between the structure of the two typical shrub species and their wind-shadow dunes.The results showed that,under the same habitat conditions,the average sand deposition area of O.aciphylla was much smaller than that of C.microphylla,but the average deposited sand volume of the former was bigger than that of the latter.The plant height,canopy and sectional area of windward side of the plants were all the key characteristic parameters affecting the sand-deposition effect of the shrubberies.Under the similar size of shrubberies,the correlation between the structure of O.aciphylla shrubbery and the characteristic parameters of the wind-shadow dune was higher than that between the structure of C.microphylla and the wind-shadow dune,the sand-deposition effect of O.aciphylla shrubbery was better than that of C.microphylla shrubbery.Holistically,the fitting degree between the plant height and the sectional area of windward side of the two typical shrub species and length and volume of wind-shadow dune was high.Sand trapping capability of the two typical shrub species was in an increase trend with the increase of shrubbery height and of sectional area of windward side of the plants,and the sand trapping capability of O.aciphylla was higher than that of C.microphylla.

Key words: Oxytropis aciphylla, Caragana microphylla, structure of shrubbery, wind-shadow dune, Yamaleike Desert