旱作农田土壤风蚀物特征试验研究

以科尔沁沙地南缘的典型农牧交错带旱作农田为试验区,利用AVM-01型便携式风速计测定瞬时风速和任一时段的平均风速,采用自制沙尘采集器收集气流中的风蚀物,并对收集到的风蚀物进行筛分、称重和理化检验,详细地分析了不同高度输沙量、粒径分布、有机质和养分富集率等风沙运动影响因素的变化特征,初步了解该地区土壤风蚀的特点,为农田沙漠化防治提供理论依据。

Experimental Study on the Characteristics of Wind Erosion Sediment in Dry Farmland

The dry-farming lands on agro-pastoral mixed regions in south Korqin sandy land were studied.The AVM-01 pocket anemoscope was used to measure instantaneous wind velocity and average wind velocity at any period,and the dust-collector was used to collect wind erosion matters.The collected grains were sieved and weighed,and physical-chemical testing was also carried out.The main variable characteristics of wind erosion sediment were analyzed,including the sediment discharges,the grain size distributions and the OM and nutrients enrichment rations of sediment at different altitudes.By studying the wind erosion characteristics in the region,some foundations were provided for the further research on desertification control of dry farmland.