The soil water and the physical and chemical properties of soil were studied.The results showed that: with increase in age

the site quality of plantation for wind protection and sand fixation was changed obviously

bulk density decreased

soil porosity increased

soil water holding capacity improved and soil fertility enhanced

the physical and chemical characteristics of soil were improved to some extent.With the planting of plantation for wind protection and sand fixation

the trend of soil water decreasing became the limiting factors for vegetation renewal and rebuilding and the stability of plantation for wind protection and sand fixation.