几种生态草在瓮福磷矿废弃地的水土保持研究

Study on the Function of Soil and Water Conservation of Several Grasses in Wastelands of Wengfu Phosphate Mine

选用3种生态草在瓮福磷矿废弃地进行水土保持研究,以期为矿山废弃地和石漠化地区的水土保持提供依据。通过3年的测定结果表明:种植香根草、百喜草、高羊茅可大幅度降低磷矿废弃地的径流量与泥沙冲刷量。在径流量上,不同牧草在同一年度内,表现为香根草<百喜草<高羊茅<裸地,而同一牧草在不同年度上则表现为逐年上升。在土壤侵蚀量上,不同牧草在同一年度内,表现为香根草<百喜草<高羊茅<裸地,而同一牧草在不同年度上则表现为逐年下降,3年后香根草、百喜草、高羊茅种植地土壤侵蚀量分别下降了82.94%、79.72%和74.63%。水土保持效果随着时间的延长效果越明显。

To obtain sufficient data imformation to support ecological managements in wastelands of Wengfu phosphate mine and rocky desertification area,the function of soil and water conservation of three grasses were studied in this research.Through investigated on runoff and sediment erosion in three years,data analysis showed that:planting vetiver,bahia grass,tall fescue greatly reduced the runoff and sediment erosion.For runoff,The order from high to low in the same year was vetiver,bahia grass,tall fescue and bare land,and the same species showed an accleration in different years.For sediment erosion the order from high to low in the same year was vetiver,bahia grass,tall fescue and bare land,and the same species decreased year by year,as its soil erosion has fallen by 82.94%,79.72% and 74.63% after three years,respectively.And the data of variance analysis showed that:the conservation of water and soil capacity of grasses were increased with prolonged time.