Dust emission depends directly and indirectly on soil particle distribution, but little information is available that examines dust emission potential and its relationship with wind erosion for different soils. This study aimed to elucidate the difference in wind erosion characteristics between loamy farmland (LF) and sandy farmland (SF) and discuss the influence of this difference on dust emission potential. Field observations were conducted during 2012–2016 in Bashang district, North China. With increasing friction wind speed, the horizontal mass flux increased exponentially in LF but obeyed the power function in SF. The horizontal mass flux was higher in SF than in LF, but the gap narrowed from 766 times at friction wind speed of 0.3 m s⁻¹ to 50 times at 0.6 m s⁻¹. The dry aggregate size distribution of sediment in LF was finer than in SF. Fine particle content (diameter < 0.05 mm) in windblown sediment was much higher in LF (31.39%) than in SF (5.92%), which was influenced by parent soils. With height increasing, the mass percentage of sediment decreased more rapidly in SF than in LF, with 86% and 66% of sediment clustering at height 0–20 cm, respectively. Because the horizontal mass flux and dust content in sediment both increased more quickly in LF than in SF with increasing friction wind speed, the dust emission potential was larger in LF than in SF under strong winds. The adverse effect of dust emission in loamy soils on atmospheric pollution should receive more attention in strong wind erosion events.

中文翻译：

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壤土和沙质农田间风蚀特征的差异及其对土壤粉尘排放潜力的影响

扬尘排放直接或间接取决于土壤颗粒的分布，但是很少有信息可以检查扬尘排放潜力及其与不同土壤风蚀之间的关系。这项研究旨在阐明壤土农田（LF）和沙质农田（SF）的风蚀特征之间的差异，并讨论这种差异对粉尘排放潜力的影响。在2012-2016年间在华北坝上地区进行了实地观察。随着摩擦风速的增加，LF的水平质量通量呈指数增长，而SF的功率函数服从。SF的水平质量通量高于LF，但间隙从摩擦风速0.3 m s ^-1时的766倍缩小到0.6 m s ^-1时的50倍。LF中沉积物的干骨料粒度分布比SF中细。LF（31.39％）的风吹沉积物中的细颗粒含量（直径<0.05 mm）比SF（5.92％）高得多，这受母体土壤的影响。随着高度的增加，SF中的沉积物质量百分比下降速度比LF下降得更快，分别有86％和66％的沉积物聚集在0-20 cm高度。由于随着摩擦风速的增加，LF中泥沙的水平质量通量和粉尘含量均比SF更快地增加，因此在强风下，LF中的粉尘排放潜力要大于SF。在强风蚀事件中，壤土中粉尘排放对大气污染的不利影响应引起更多关注。