Changes on its chemical characteristics and soil particle composition after water formation in the Qingtu Lake

Importing water to Qingtu Lake as a key measure, it has great significance to protect the water resources and ecological environment in the Shiyang River Basin. Stratified samples three soil layers of 0-60 cm in ten plots from 0 to 450 m of southeast water margin of Qingtu Lake were measured mass percentage of soil particle size and total nitrogen, total phosphorus, total potassium and conductivity, then soil particles composition and chemical properties change were analyzed after water formation of Qingtu Lake. The results showed that, with increasing distance from the margin of the water, soil particles and chemical properties showed regular changes of increasing or decreasing, and soil clay composition positively linear correlated to total potassium and total phosphorus. The soil properties changes were exacerbated in 0-150 m from the margin of the water. Soil fine and nutrients appeared enrichment and reached the extreme at 100-150 m and 300 m from the margin of the water. Therefore, the good correlation between soil nutrients and soil fine matter showed that the change of soil clay particles could be used as a quantitative index to reflect the change of soil properties and the degree of soil restoration after the water formation.