不同改良剂修复铁尾矿的研究

Study on Repairing Iron Tailings with Different Amendments

铁尾矿由于其产量大,碱性高,营养成分含量低等特点,并不利于植物的生长,长期堆存还会带来各种问题。因此,铁尾矿的改良修复对人类社会具有很大的意义。本试验主要是针对唐山市铁尾矿不同改良剂修复进行可行性研究。采用室内盆栽的方法,选用生物炭、有机肥及秸秆为改良剂,按质量梯度1%、3%、5%添加,对尾矿各营养指标含量及种植的紫花苜蓿的生长状况进行了适宜性研究。研究表明三种改良剂都能提高尾矿中有机质、碱解氮、速效钾以及速效磷的含量,且有机肥对植物生长最有利。本研究的结果表明这三种改良剂都能改良尾矿结构,达到修复铁尾矿的目的,其中有机肥修复效果最好。

Due to the characteristics of large yield,high alkalinity and low nutrient content,iron tailings are not conducive to plant growth,long-term storage will bring various problems.Therefore,the improvement and repair of iron tailings has great significance for human society.This test is mainly for the feasibility study of different amendments for repairing iron tailings in Tangshan City.This method of indoor potting was carried out by using biochar,organic fertilizer and straw as modifiers,and the quality gradient was 1%,3%,5%.The growth status and the content of various nutritional indicators of alfalfa planted on the tailings were carried out.The results showed that the three amendments could increase the contents of organic matter,alkali-hydrolyzed nitrogen,available potassium and available phosphorus in tailings,and organic fertilizer was the most beneficial to plant growth.The results of this study showed that all the three amendments could improve the soil structure and achieve the purpose of repairing iron tailings,among which the organic fertilizer had the best effect.