Analysis of Soil Characteristics of Artificial Forest Land in Aohan County of Inner Mongolia

Taking the typical semiarid farming-pasture region of Aohan county in Chifeng city of Inner Mongolia as example,the soil characteristics of sandy soil and chestnut soil of 6 site types were studied,including pure Populus simonii forest,pure Pinus sylvestris forest,pure Caragang korshinskii forest,mixed forest of Populus simonii+ Prunus ansu,mixed forest of Populus simonii+ Pinus sylvestris,and barren grassland.The results showed that the soil physical properties of different vegetation types were obviously different.The exhibition of soil volume weight was: pure Populus simonii forest pure Pinus sylvestris forest mixed forest of Populus simonii+ Pinus sylvestris mixed forest of Populus simonii+ Prunus ansu pure Caragang korshinskii forest barren grassland.The soil moisture content,porosity and content of organic matter had the following order: barren grassland pure Caragang korshinskii forest mixed forest of Populus simonii+ Prunus ansu mixed forest of Populus simonii+ Pinus sylvestris pure Pinus sylvestris forest pure Populus simonii forest.In vertical section,the soil volume weight in all kinds of forest lands gradually increased with the increase of soil depth,while the soil moisture content,porosity and organic matter content presented the trend of gradual decrease.