Nature meadow have rather high penetrance, Huaqing No.3 pasture has notable effect in preventing and curing loss of soil and water, soil self-restraint and cutting down floor runoff.

• 天然草场有较高的渗透率，华青三号对防治水土流失、涵养土壤中的水分、减少地面径流的流失具有显著的作用。