摘要
以四川资阳土壤保护站１９８９～１９９５年径流小区观察资料为依据，分析了不同生态利用条件下，径流诸因素与相对应的泥沙冲刷量的关系，确认径流深为其主导影响因素。运用土壤抗冲性指标的均值Ｋｗ＝１ｎ∑ｎｉ＝１Ｋｗｉ的计算方法，研究不同农耕措施与利用对Ｋｗ的影响。探讨了同一径流小区次降雨径流强度、径流时间与土壤抗冲性指标的关系，及作物不同生育时期土壤抗冲性指标的动态变化。
Based on the data of runoff plots in Ziyang soil and water conservation station from 1989 to 1995, the correlation among rainfall runoff, etc. and corresponding soil loss under different ecological conditions have been analyzed and it has been the runoff depth is a major factor for soil loss. Based on the mean index of soil anti scourability w=1n∑ni=1 wi the effects of the different tillage and utilization on w, the relationship among runoff intensity or runoff duration of individual rainfall and soil anti scourability index, and the indexes of soil anti scourability in different growth periods of crops in same plots have been studied. Finally, it has been thought that the straw cover and no tillage can promote the soil anti scourability.
