为确定表土流失对N素矿化潜能、农作物产量损失以及对施N肥或P肥恢复生产力的影响,在艾伯塔省中部的两种松软土上进行了温室试验和培育试验。通过试验得出这样的结论:1)两种松软土的土壤生产力随表土流失深度的增加而降低;2)施N肥或P肥可提高侵蚀表土的产量,但达不到同样施肥处理的非侵蚀表土的产量。 In order to determine the effect of topsoil loss on N mineralization potential, crop yield loss and the impact on N or P fertility recovery, greenhouse experiments and incubation experiments were conducted on two loose soils in central Alberta. The conclusions drawn from the experiments are as follows: 1) The soil productivity of the two soft soils decreases with the increase of soil erosion depth; 2) The application of N fertilizer or P fertilizer can increase the yield of eroded topsoil, but it can not reach the same fertilization treatment. Eroded topsoil production.