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通过研究不同时期半干旱地区农田地表粉尘释放特征,采用野外观测对比分析的方法,分析不同地表特征与地表空气动力学粗糙度的相关性、不同季节和不同地表土壤类型与地表粉尘释放的相关性,得到了半干旱地区农田粉尘释放通量。结果表明,半干旱地区裸露的农田中沙壤土农田地表粉尘释放通量最大,地表粉尘释放通量为21～39μg·m~(-2)·s~(-1);其次是壤土农田,地表粉尘释放通量为12～19μg·m~(-2)·s~(-1);黏壤土农田地表粉尘释放通量最小,在5～8μg·m~(-2)·s~(-1)。
By studying the characteristics of surface dust emission from farmland in semi-arid areas in different periods, the correlation between different surface features and surface aerodynamic roughness was analyzed by field observation and comparative analysis. The correlations between soil types and surface dust release in different seasons and different surface types were analyzed , Obtained dust emission flux in farmland in semi-arid area. The results showed that the surface dust emission flux of sandy loam soil was the highest in exposed farmland of semi-arid area, and the surface dust emission flux was 21-39 μg · m -2 (-2) · s -1, followed by loam soil, surface dust The release flux was 12 ~ 19μg · m ~ (-2) · s ~ (-1), and the surface dust flux in the clay soil was the lowest at 5 ~ 8μg · m ~ (-2) · s ~ (-1) .