Abstract:
The soil physical and chemical property, as important index for soil health evaluation, is sensitive to land use patterns.In order to understand the effects of land use patterns on the soil physical and chemical property in the Bashang area of Zhangjiakou City, four main land use patterns including grassland, woodland, vegetable land and conventional cropland were selected, and then soil pH, bulk density, SOC, TN, TP and available trace elements in the 0~15 cm and 15~30 cm soil depths were analyzed.Results showed that, bulk densities of surface soil(0~15 cm) had no significant difference among the four land use types.However, bulk densities of subsurface soil (15~30 cm) in vegetable land and cropland (1.62 g·cm
-3) were significantly higher than that in woodland (1.51 g·cm
-3) and grassland(1.37 g·cm
-3), indicating the physical compaction caused by tillage.The pH of surface and subsurface soil of vegetable land and cropland was significantly lower than that of woodland and grassland.SOC contents and nitrogen content in vegetable soil of the 0~15 cm and 15~30 cm depth were with the highest value in 4 land use patterns, and the contents of available Cu(0.59 mg·kg
-1) and available Zn(2.04 mg·kg
-1) were significantly greater than those of other 3 land use patterns.TP contents of grassland(2.88 g·kg
-1) and vegetable land(2.86 g·kg
-1) were significantly higher than those of forestland and cropland.The contents of SOC, TN and TP were all significantly positively correlated with the content of soil clay particles; while the contents of available Fe, available Mn and available Zn were significantly negatively correlated with soil pH; there was a significant positive correlation between the content of SOC and contents available of Fe, Mn, Cu and Zn.These results can provide the foundation support for the scientific management and sustainable utilization of land resources in Bashang area.