Soil clay content is one of the primary intrinsic soil properties affecting soil erodibility and ecological processes, but few studies have tested the effects of clay amendment on wind erosion of soil. The objective of this study was therefore to evaluate the effect of progressive clay amendment on wind erosion of soil in the inland Pacific Northwest, where there is a high soil erodibility risk due to the arid and semiarid environment and sandy soils. Clay amendment significantly increased crust crushing energy when physical soil crusts formed after simulated rainfall. Crusts were then subject to simulated tillage to create an erodible soil surface before determining wind erosion in a wind tunnel. Soil loss significantly decreased with increasing clay amendment, even for low clay amendments (2%), soil loss at this percentage of clay amendment was 13.1–99.7% lower as compared with a soil surface devoid of clay amendment for the four soil types. The rate of change in erosion decreased with increasing amounts of clay amendment. Clay amendment was more effective in decreasing soil loss for two sandy loams or soil types with lower clay content. Clay amendment decreased soil loss primarily due to its impact on increasing aggregate geometric mean diameter (GMD), but aggregate crushing energy is also important in decreasing soil loss in terms of decreasing abrasion flux. Clay amendment is thus an effective way to restrain land deterioration in terms of increasing crust crushing energy, aggregate GMD, and decreasing abrasion flux.

中文翻译：

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美国内陆西北太平洋受黏土改良剂影响的土壤风蚀

土壤黏土含量是影响土壤易蚀性和生态过程的主要内在土壤性质之一，但很少有研究测试黏土改良​​剂对土壤风蚀的影响。因此，本研究的目的是评估渐进粘土改良剂对西北太平洋内陆地区土壤风蚀的影响，西北太平洋内陆由于干旱和半干旱环境以及沙质土壤而具有较高的土壤易蚀性风险。当模拟降雨后形成物理土壤结皮时，粘土改良剂显着增加了结皮粉碎能量。然后在确定风洞中的风蚀之前，先对地壳进行模拟耕作，以形成易蚀的土壤表面。土壤损失随着粘土改良剂的增加而显着减少，即使是低粘土改良剂（2％）与四种类型的不含粘土改良剂的土壤表面相比，以这种粘土改良剂的百分比计算的土壤流失率降低了13.1％至99.7％。侵蚀变化率随粘土改良剂用量的增加而降低。对于两种砂壤土或粘土含量较低的土壤类型，粘土改良剂在减少土壤流失方面更有效。粘土改良剂减少了土壤流失，主要是因为它对增加的总几何平均直径（GMD）产生了影响，但是集料压碎能量在减少土壤流失方面也很重要，因为其减少了磨蚀通量。因此，就增加地壳压碎能量，提高骨料GMD和减少磨蚀通量而言，粘土改良剂是抑制土地退化的有效方法。侵蚀变化率随粘土改良剂用量的增加而降低。对于两种砂壤土或粘土含量较低的土壤类型，粘土改良剂在减少土壤流失方面更有效。粘土改良剂减少了土壤流失，主要是因为它对增加的总几何平均直径（GMD）产生了影响，但是就减少磨蚀通量而言，骨料的破碎能对于减少土壤流失也很重要。因此，就增加地壳压碎能量，提高骨料GMD和减少磨蚀通量而言，粘土改良剂是抑制土地退化的有效方法。侵蚀变化率随粘土改良剂用量的增加而降低。对于两种砂壤土或粘土含量较低的土壤类型，粘土改良剂在减少土壤流失方面更有效。粘土改良剂减少了土壤流失，主要是因为它对增加的总几何平均直径（GMD）产生了影响，但是集料压碎能量在减少土壤流失方面也很重要，因为其减少了磨蚀通量。因此，就增加地壳压碎能量，提高骨料GMD和减少磨蚀通量而言，粘土改良剂是抑制土地退化的有效方法。粘土改良剂减少了土壤流失，主要是因为它对增加的总几何平均直径（GMD）产生了影响，但是集料压碎能量在减少土壤流失方面也很重要，因为其减少了磨蚀通量。因此，就增加地壳压碎能量，提高骨料GMD和减少磨蚀通量而言，粘土改良剂是抑制土地退化的有效方法。粘土改良剂减少了土壤流失，主要是因为它对增加的总几何平均直径（GMD）产生了影响，但是就减少磨蚀通量而言，骨料的破碎能对于减少土壤流失也很重要。因此，就增加地壳压碎能量，提高骨料GMD和减少磨蚀通量而言，粘土改良剂是抑制土地退化的有效方法。