裸露耕地土壤风蚀跃移颗粒分布特征的试验研究

Experimental study on the distribution characteristics of the saltation particle of aeolian sediment in bare tillage

以内蒙古阴山北部的典型农牧交错带耕地为试验区,利用DEM 6型轻便三杯风向风速表和LV 50便携式风速仪(可测瞬时风速和任一时段的平均风速),采用SC—I型沙尘采集器收集跃移沙粒,并对收集到的沙粒进行筛分、称重,详细地分析了不同高度风蚀物百分含量、输沙量等风沙运动主要影响因素的变化特征,得出了耕地土壤在风沙跃移运动中的粒径分布特征,初步了解了该地区土壤风蚀的特点,为今后风沙运动力学理论的深入研究,以及实施保护性耕作和其他土地荒漠化的防治提供依据。

The study bases on Agro-Pastoral mixed regions in Inner Mongolia. The study uses DEM6 pocket three cups wind direction and wind velocity anemometer, LV50 pocket anemoscope that can measure instantaneous wind velocity and average wind velocity in any period. The SC-I dust-collector was also used to collect saltation grains. After sieving and weighting the collection grains, the main variable characteristics of wind movement, such as the percentage of sediment at different altitudes and sediment discharges were analyzed. Based on the study, the results on the particle distribution of saltation process in tillage were obtained. By studying the wind erosion characteristics in the region, some foundations were provided for the further research on the wind erosion dynamics characteristics.