冷水江锑矿区重金属污染林地土壤理化特性研究

Study on Physical and Chemic Characte of Forestry Soil Polluted by Heavy Metals in Antimony Mine of Len-Shuijiang City

为了锑矿区土壤生态修复、造林树种选择和快速恢复植被提供科学依据,对冷水江锑矿区受重金属污染的林地土壤理化特性进行了分析,结果表明:矿区不同地点pH值、有机质、碱解氮、有效P、速效K有极显著差异,而同一地点不同土层厚度土壤容重、有机质、有效P、速效K有极显著差异,矿区林地土壤呈弱酸性反应,联盟点以土壤容重、速效K最高,七里铺以有机质、碱解氮、有效P最高。随着土层厚度的增加,土壤容重增大、土壤有机质含量降低、土壤有效磷含量降低、碱解氮呈多态反应。表层土壤速效钾显著高于其它土层。锑矿区土壤有机质、速效K较丰富,而有效P极度匮乏。

The physical and chemic character of forestry soil polluted by heavy metals in antimony of Len Shuijiang city is studied in order to afford scientific principle to ecological rehabilitate soil and select afforestation trees and restore vegetation rapidly. The result showed that there is significant difference in pH, soil organic matter, available nitrogen, available phosphorus, and available potassium at different antimony mineral sites. There is significant difference in soil bulk density, soil bulk density, soil organic matter, available phosphorus, and available potassium at the same antimony mineral soil depth. The forestry soil of antimony mine is feebleness acid reaction. The soil bulk density, available potassium is maximum in Lianmeng plot. The soil organic matter, available nitrogen, available phosphorus is maximum in Qilipu plot. The soil bulk density increase and the soil organic matter and available phosphorus reduce with the depth increase but available nitrogen is polymorphic. The available potassium of topsoil maximum. The soil organic matter and available potassium is enrichment but available phosphorus is poor.