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在西北黄土高原及邱陵地区,由于土壤有机质缺乏,团粒结构极低,加之土壤本身质地疏松,易受雨水侵蚀,表土肥料大量冲走,使土壤长期处于贫瘠、干旱状态,地表植被不能恢复,更加剧了水土流失的程度。为了寻找改变以上情况的方法,分别在天水、绥德、西峯三个水土保持科学试验站进行试验,以达到改良土壤,提高土地肥力,增加地面被复,减少水
In the Northwest Loess Plateau and QiuLing area, due to the lack of soil organic matter, the extremely low aggregate structure and the loose texture of the soil itself, it is susceptible to rainwater erosion and the surface soil fertilizers are washed away in a large amount. As a result, the soil is in a barren and arid state for a long time, Exacerbated the extent of soil erosion. In order to find a way to change the above situation, experiments were carried out in three water and soil conservation scientific experiment stations in Tianshui, Suide and Xifeng so as to improve the soil, increase the fertility of the land, increase the ground cover and reduce the water