固体废弃物修复荒漠化土壤的研究——以包头地区为例

Environment Rehabilitation of Desertificated Soil by Solid Wastes ——A case from Baotou, Inner Mongolia

本文在内蒙古包头市北梁区荒漠化土壤的质地和养分元素含量分析的基础上,与包头市大量堆积的、严重威胁环境的三种固体废弃物(粉煤灰、水库淤积物和污水沉淀物)进行了对比研究。结果表明:该三种废弃物具有细粒、富含植物生长所必需之养分元素的特点。以该区荒漠化土壤作基本土壤,三种废弃物作土壤添加剂进行了玉米、沙棘树和草坪草的种植实验,结果显示:(1)三种废弃物添加到荒漠化土壤中,能够显著增加土壤的养分含量。(2)荒漠化土壤被改造成为近轻壤土的砂壤土或轻壤土。(3)改良后的土壤能够显著增加土壤的生物生产量。

Desertification is a seriously problem in China, therefore, the research program for reversing desertification and rehabilitating the environment should be carried out. We firstly analyzed the texture and nutrient content of desertificated soil in Beiliang area of Baotou, Inner Mongolia,and then, coal ash, reservoir sediments and sewage sludge were analyzed. The results showed that there are more fine particles in the three solid wastes and there are abundant nutrients in each kind of waste. A cultivation experiment (maize, thorn and lawn gross) was carried out with mixed soil by adding the three solid wastes at proper rates. The results showed that: (1) the contents of nutrient in the desertificated soil increased largely by adding the three solid wastes. (2) The desertificated soil changed into the sand soil.(3)The improved soil had more botanic production.