[Objective] Analyzing the responses of shifting-sand physical and chemical properties improvement to sand control technologies(gravel cover+artificial vegetation+enclosure) in Jiandang wide valley area of Yarlung Zangbo River

to provide theoretical guidance for regional desertification control.[Methods] Soil mechanical composition

organic matter and nutrients

etc. were comparatively analyzed between the samples of the sand fixed region and the ones of the mobile sand dune.[Results] After combined plantation and engineering measures were applied

such as gravel laying over the mobile dune surface

sand-fix-capable plant seeds sowing and enclosing

the sand of dune surface was fixed and the vegetation cover increased. As compared with the mobile sand dune

the contents of clay and silt particles increased significantly. The contents of soil organic matter

total nitrogen

alkaline hydrolytic nitrogen

total phosphorus

available phosphorus and potassium in sand fixed region were higher than those of the corresponding values of mobile sand dune. Especially in 0-5 cm soil layer

greater improvements of 634.3%

268.0%

506.5%

38.3%

343.8%

66.7% of the fixed dune were obtained against the ones of the mobile sand dune

respectively. pH value at 0-5 cm soil layer in sand fixed region decreased by 11.5% in comparison with the one of the mobile sand dune; whereas the value of conductivity at 0-5 cm soil layer in sand fixed region increased by 268.1% than the value of the mobile sand dune.[Conclusion] The sand control technologies(gravel cover+artificial vegetation+enclosure) obviously fixed mobile sand and improved the soil physical and chemical properties

and were suitable for popularization and application in these region.