黄土丘陵区小流域土壤特性时空动态变化研究

Temporal and Spatial Variation of Soil Characters in Small Catchment of Loess Hilly Areas

以安塞大南沟为例首次在流域范围内对几项土壤表面特性进行连续定位测定,初步研究了其时空动态变化规律。结果表明,大南沟流域内土壤随机糙度、抗剪力和团粒稳定性具有一定的空间变化规律,不同土地利用方式间有显著差异。不同地貌类型农耕地土壤随机糙度、抗剪力无明显差异,而团粒稳定性则差异显著。年内各测定周期间土壤随机糙度、抗剪力和团粒稳定性随时间变异不显著。

Several soil surface characters in spatial and temporal variation have been measured continuously in a small catchment. The results showed that soil surface random roughness, soil cohesion and aggregate stability had significant difference among land use types. There was no significant difference among different topographic croplands for random roughness and cohesion, however, soil aggregate stability had significant spatial difference among different topographic croplands. All of those soil surface characters had no significant temporal difference in the research periods.