بررسی چگونگی تأثیر بوته‌های گیاهی بر میزان فرسایش و رسوب بادی در مناطق خشک (مطالعۀ موردی: منطقۀ صبریِ شهرستان سبزوار)

The effects of vegetation on wind erosion, especially in arid areas, are known, but few studies have assessed the quantitative impact of plant species. The aim of this study was to investigate the effects of plant species on wind erosion and deposits. Three experimental sites were selected in Sebri, Iran. Two sites contained two plant species, Launaea spinosa and Lactuca serriola of different sizes and the third was a control site. During a field survey in the summer of 2015, erosion pins were installed around the species that were read at 21-day intervals. The Tukey test was applied to the data sets gathered at the three sites as well as at different areas around the species. To investigate the spatial variability of the wind erosion map and the role of vegetation, the data was interpolated by the ordinary kriging. The results showed that the size, shape and height of the plant affects wind erosion. The estimated effective distances were 2.8 and 3.4 times the plant heights for L. spinosa and L. serriola, respectively. The amount of erosion on two sides of the species were estimated to be 0.74 and 1 times the width and 0.31 and 0.45 times the length of these species, respectively.