Roles of Self-recovering Vegetation in Soil and Water Conservation in Development and Construction Projects

According to the data from the investigation of vegetation with soil and water conservation super- vise measures,this paper discusses the roles of self-recovering vegetation in development and construction projects and probes into the effects of self-recovering vegetation on the evaluation indexes of soil and water conservation.The results obtained indicate that if surface soil is well preserved,surface vegetation self-re- covering accounting for nearly one-fourths afforestation area can be gained in the abundant rainfall area.De- pending on self-recovering vegetation on disturbed ground in the abundant rainfall area,primary vegetation coverage degree can reach more than 50% within 2 years.Owing to serious vegetation damage,shrubbery vegetation can not be completely recovered within 2 years and self-recovering vegetation on disturbed ground is generally the herbage communities.