不同修复技术下抽水蓄能电站边坡土壤养分特征分析

Soil Nutrient Characteristics of Slope of Pumped Storage Power Station Under Different Remediation Technologies

以安徽绩溪抽水蓄能电站下库左坝肩边坡修复工程为例,在边坡修复工程完成2年后,对采用植被混凝土厚层基材生态防护技术(TBS)和种植槽护坡绿化技术(ESS)的边坡土壤养分进行了测定,同时应用构建的土壤综合养分评分指标体系分析了土壤养分的整体水平。结果表明,采用TBS技术修复的3个边坡样地土壤中有机质、全氮、全磷、全钾、碱解氮、有效磷和速效钾含量等养分指标及土壤综合养分水平均高于采用ESS技术修复的3个边坡样地,说明采用含基材客土进行修复能有效改善抽水蓄能电站工程扰动边坡的土壤环境。此外,土壤有机质、全氮、速效钾含量与土壤综合养分评分的相关性最为显著,后续边坡养护过程中调控上述3项指标可快速提升土壤整体养分水平。

Taking the slope restoration project of the left abutment of the lower reservoir of Jixi Pumped Storage Power Station in Anhui Province as an example,the paper studied the soil nutrient characteristics of the slopes repaired by using vegetation concrete thick base material spraying ecological protection technology(TBS)and external-soil spray seeding ecological protection technology(ESS)respectively when the restoration project was completed after two years.At the same time,the overall level of soil nutrients was analyzed by using the constructed soil comprehensive nutrient scoring index system.The outcomes show that the soil nutrient indexed such as organic matter,total nitrogen,total phosphorus,total potassium,alkali hydrolysable nitrogen,available phosphorus and available potassium and soil comprehensive nutrient level in the three slope samples repaired by TBS technology are higher than that of the three slope samples repaired by ESS technology,showing that the soil environment of disturbed slope of pumped storage power station can be effectively improved by using the foreign soil containing base material.In addition,the correlation between soil organic matter,total nitrogen and available potassium and soil comprehensive nutrient score score is the most significant.During subsequent slope maintenance,controlling the above three indicators can quickly improve the overall nutrient level of soil.