Study On The Influence Of Four Kinds Of Sand Barriers On Drifting Environment In Mu Us Sand Land

In this study,high-rise shale sand barrier,semi-concealed arborvitae sand barrier,banded sand willow bio-sand barrier and sandy sphagnum shrub bio-sand barrier were set up in the moving sand dunes of Mu Us Sandy Land.The wind speed change,the degree of erosion,the change of soil physical properties and the vegetation restoration in different parts of the sand dunes and bare sand dunes were analyzed,and the effects of sand barrier on vegetation restoration and quicksand environment were revealed.The results show that:(1)The sand barrier setting increases the surface roughness.The wind speed under different sand barrier measures is not obvious in the vertical direction.High vertical sand barrier,semi-concealed sand barrier,banded sand barrier and sand shoal sand barrier 10cm The windproof performances are:31.89%,23.31%,25.04%,and 42.36%.The order of the overall wind protection effects of the four types of sand barriers is:sand tarmac>high vertical sand barrier>banded sand barrier>semi-concealed sand barrier.(2)Different sand barrier measures can effectively reduce surface sand material erosion.The soil erosion of the semi-concealed sand barrier dunes and bare sand dunes is in an erosion state,while the high vertical sand barrier,the banded sand barrier and the sand dune sand dune are in a stacked state.(3)The sand barrier setting makes the volume fraction of soil mechanical composition powder and ultrafine sand increase compared with bare sand dunes,which effectively increases the water content of 0?10 cm soil layer on the surface.The soil pH value of sand dune sand dune is higher than that of bare sand dune.The difference was significant(P<0.05).The plant density and vegetation coverage of the sand dunes are higher than those of bare sand dunes,and the density of plants in the sand dunes of the belt sand barrier is the largest.There are some differences in vegetation restoration in different parts of the sand dunes,and the vegetation restoration ability at the top of the dunes is poor.(4)Four kinds of sand barriers have played a role in fixed quicksand,and the effect of sand damage control is obvious.