Abstract

Wind erosion is most likely influenced by unsuitable tillage and is considered critically harmful process for sustainable agriculture in arid and semi-arid regions as drought becomes more frequent and severe due to changes in the climate. The study was conducted for spatial modeling of aeolian sediment transport over adjacent plots managed by wheat-fallow rotation system under rainfed agriculture in the semi-arid region of Turkey. Four erosion events took place and the results were evaluated using data of 8 measurements over two plots during events. Wind-driven sediment transport rates (Q_t) varied between 0.0015 and 0.0075 kg m⁻¹ h⁻¹, highly depending upon the prevalent land surface characteristics during each case, and there was no event-based conclusion that the semi-arid dryland fallow system would exacerbate wind erosion losses when Q_t values from either plot were compared. Of all cases, particularly, the greatest soil loss occurred in Case 3 over the fallow plot, for which Qt values were 0.0075 kg m⁻¹ h⁻¹ when wheat crop provided full soil cover above the next plot. Geostatistical analyses revealed the range values as between 450–800 m. Kriging maps showed that spatial pattern of Qt values of cases for both land uses were almost quite different.

摘要

风蚀很可能受到不适当耕作的影响，并且由于气候变化导致干旱变得更加频繁和严重，干旱和半干旱地区的可持续农业被认为是有害的过程。这项研究是针对土耳其半干旱地区雨养农业下小麦-小轮作系统管理的相邻土地上风沙沉积物的空间迁移进行的。发生了四次侵蚀事件，并在事件期间使用了两次绘图中的8次测量数据来评估结果。风动泥沙输送速率（Q _t）在0.0015至0.0075 kg m ^-1 h ^-1之间变化，这在很大程度上取决于每种情况下普遍的地表特征，并且没有基于事件的结论，即当比较任一地块的Q _t 值时，半干旱旱地休耕系统都会加剧风蚀损失。在所有情况下，尤其是在案例3中，休耕地的土壤流失最大，当小麦作物在下一个耕地上方提供全部土壤覆盖时，Qt值为0.0075 kg m ^-1 h ^-1。地统计分析显示范围值在450–800 m之间。克里格地图显示，两种土地利用案例的Qt值的空间格局几乎完全不同。