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首页> 外文期刊>Soil & Tillage Research >Aeolian processes and their effect on sandy desertification of the Qinghai-Tibet Plateau: A wind tunnel experiment
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Aeolian processes and their effect on sandy desertification of the Qinghai-Tibet Plateau: A wind tunnel experiment

机译：风沙试验对青藏高原风沙过程及其对沙质荒漠化的影响

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摘要

To determine the contribution of aeolian processes to sandy desertification, we applied different wind velocities to soils from the Qinghai-Tibet Plateau that were subjected to the human activities such as wholesale destruction of vegetation. We then employed field investigations, soil sampling in the field, wind tunnel experiments, particle size analyses, and nutrient analyses. After the ground surfaces were crushed to simulate land degradation, the aeolian transport in this region varied from 0.00 to 43.49 g m(-2) s(-1) and was dependent on the particle size composition, and variation in the intensity of aeolian processes. During the aeolian processes our wind tunnel results show differences between the nutrient contents of the transported materials and those of the surface soils, and the loss of total nitrogen (TN), total carbon (TC) and total phosphorus (TP) varied between 0.00 and 8.81, 0.10 and 122.27, 0.00 and 1.14 g m(-2), respectively. In addition, variations in wind velocities did not result in significant differences in the particle size fractions of the transported materials. On the Qinghai-Tibet Plateau, although an increase in human activity may trigger sandy desertification, the occurrence of sandy desertification was not significant in the early 21st century, and hence it is likely to be controlled by climate even though human impacts have undeniably exacerbated its effects. (C) 2015 Elsevier B.V. All rights reserved.
机译：为了确定风沙过程对沙化荒漠化的贡献，我们对青藏高原的土壤施加了不同的风速，这些土壤受到了诸如植被的全面破坏等人类活动的影响。然后，我们进行了田野调查，田间土壤采样，风洞实验，粒度分析和养分分析。在将地面压碎以模拟土地退化之后，该区域的风沙运输范围从0.00到43.49 g m（-2）s（-1）不等，并且取决于粒度组成和风沙过程强度的变化。在风沙过程中，我们的风洞结果表明，所输送的物料的营养成分与表层土壤的营养成分之间存在差异，并且总氮（TN），总碳（TC）和总磷（TP）的损失在0.00到0.5之间变化。分别为8.81、0.10和122.27、0.00和1.14 gm（-2）。此外，风速的变化不会导致所运输物料的粒径分数有显着差异。在青藏高原上，尽管人类活动的增加可能引发沙质荒漠化，但在21世纪初期沙质荒漠化的发生并不重要，因此尽管人类的影响无可否认地加剧了沙化荒漠化，但仍可能受到气候的控制。效果。 （C）2015 Elsevier B.V.保留所有权利。

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