蒲石河蓄能电站河岸带土壤性质分析

[目的]研究蓄能电站不同类型河岸带土壤性质的变化规律。[方法]选取草地、林地、耕地3种用地作为研究对象,分别在采样线距水陆交界线1、2、3、4、5、6、7、10、15、20、25、30、35 m处布点。用环刀法测定土壤容重、土壤密度、毛管孔隙度等物理性质。[结果]蒲石河蓄能电站河岸草地土壤容重为1.25~1.57 g/cm3,土壤总孔隙度随着距水距离的增大呈先增加后降低的规律,距水5 m处为拐点。河岸带林地田间持水率随距水距离的增大呈先降低后升高的规律。林地土壤的总孔隙度、非毛管孔隙度最高。[结论]河岸带林地的保水、持水能力最强。该研究为维护和保持蓄能电站河岸带的生态平衡提供了基础数据。

Soil Properties in Riparian Zone of Storage Power Station in Pushi River

Objective] To find the changing rules of soil properties in riparian zone of storage power station in Pushi River.[Method] Grass-land, forest land and cultivated land were selected as the research objects, points were set where the distances between sampling line and the bor-der line of water and land were 1, 2, 3, 4, 5, 6, 7, 10, 15, 20, 25, 30 and 35 m.Soil bulk density, soil density and capillary porosity were detected by ring-cutting method.[Result] Soil bulk density of grassland in storage power station of Pushi River was 1.25-1.57 g/cm3.Soil to-tal porosity firstly enhanced and then reduced as the distance from water enhanced.And there was an inflection point when the distance from wa-ter was 5 m.As for the forest land in riparian zone, field capacity firstly reduced and then enhanced as the distance from water enhanced.Soil in forest land had the highest total porosity and noncapillary porosity.[ Conclusion] Forest land in riparian zone has the strongest water-holding capacity.This research provides basic data for the maintaining of ecological balance of riparian zone of storage power station.