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通过对子午岭林区林地未开垦及开垦后分别布设的标准小区与大型坡面径流场所测定的径流、泥沙资料进行对比分析，提出在非林地的坡面上用标准小区观测资料建立的坡面土壤流失方程有局限性；在林地上，无论是标准小区，还是大型坡面径流场所测定的径流、泥沙量，均可作为有林小流域径流量和泥沙量的参考值。另根据对大型坡面径流场、标准小区和小流域把口站所测定的径流量、泥沙量资料进行分析，认为利用标准小区所测定的非林地泥沙量可以作为小流域把口站输沙量的参考值，而用大型坡面径流场所测定的林地与非林地泥沙量比值可以作为相似条件下小流域林区与非林区泥沙量之比值。
By comparing and analyzing the runoff and sediment data of standard plots and large-scale runoff sites, which were not reclaimed and reclaimed after forest reclamation in Ziwuling area, the slope and sediment data were compared and analyzed. The slope established on the non-forest land with standard cell observation data Surface soil loss equation has its limitations. On the forest land, runoff and sediment amount measured in standard plot and large-scale runoff can be used as a reference value for runoff and sediment yield in a small watershed. According to the data of runoff and sediment measured by large-scale slope runoff field, standard community and small watershed observation station, it is considered that non-forest sediment amount measured by standard community can be used as an indicator And the ratio of forestland to non-forest sediment measured by large-scale runoff sites can be used as the ratio of sediment amount in small watershed and non-forest area under similar conditions.