人们普遍认为,由于地面上的作物覆盖和秸秆覆盖减小了雨滴对土壤的打击力,又减少了暴雨径流,因而是影响土壤侵蚀的主要因素.本试验对这两个变量如何影响细沟侵蚀作了研究. It is generally accepted that the impact of these two variables on the erosion of the gully is the main factor that affects soil erosion due to the reduced impact of raindrops on the soil due to crop cover and straw mulch on the ground and the reduction of storm runoff Made a research.