天然降雨下30年生山杨林内溅蚀试验结果表明，当Ｉ_３０（最大３０分钟雨强）为0.076ｍｍ／min或Ｐ₀（林内降雨量）为3.3ｍｍ时，清除枯落物层林地发生溅蚀，在Ｉ₃₀为0.35ｍｍ／min或Ｐ₀为25.56mm时具1cm枯落物层的林地不发生溅蚀；从溅蚀月动态看出７、８月份占全年溅蚀量的６０％以上；在同一土壤和坡度条件下，Ｉ_３０、Ｐ₀、Ｈ₁（枯落物层厚度）是溅蚀发生的主要因素，且溅蚀量（Ｓ_t）与其呈二次多项式回归关系，但当枯落物层具有一定厚度时溅蚀与其他因素无关。溅蚀主要发生在清除枯落物层的林下，随枯落物层厚度增加，溅蚀量剧减，当枯落物层积累到1cm时防止土壤溅蚀量达97.50％。

Under the condition of natural rainfall, the results of splash erosion experiment in the woodland of 30- year- old Populvs dafrdiana have shown : if 130 ( maximum thirty- minute intensity of rain) = 0. 076 mm/min or P₀ (the precipitation inside woodland) = 3. 3 mm, the splash erosion will be occured by the removing of litter layer, splash erosion is absent when litter layer is of 1 cm, 130= 0. 35 mm/min or P₀= 25. 56 mm. Splash erosion in July and August occupies more the 60% of the total annual amount. Under the same status of soil and gradient, 130, P₀ and H,(litter layer thickness) are the major factors which control the occurence of splash erosion, and the splash erosion amount will express quadratic multinomial regression relation to them, but when the litter layer reached a certain thickness, splash erosion is not related with the other facter. Splash erosion mainly occurs on the woodland which litter layer has been removed, with the increasing of litter layer, splash erosion intensely reduced, when the litter layer accumulation reachs I cm, it can prevent from 97. 5 % soil splash erosion.