This paper mainly studies the variation of
soil organic carbon and total nitrogen in planted sand regions without irrigation
in the area of the precipitation below 200 mm. The results show that with the succession from artificial plants to natural vegetation, environment of soil formation and circulation of soil material were influenced, and the
soil organic carbon and total nitrogen have been changed: (1)The content of soil organic carbon, total nitrogen, and C/N value in the planted regions have been increased compared with sand-shifting region, moreover, the soil organic carbon and total nitrogen content have a decreasing variation with soil depth increasing; (2)Soil organic carbon and total nitrogen content, C/N value in the shifting sand have a relative small variation with the increasing of soil depth; (3)The variation of soil properties in the planted regions has not obvious rule with the increasing time-spans since planting, and there are no distinctions between sand regions with different stabilization time-spans, but the development of 0～5 cm layer is closely connected with the crust layer.