【摘要】 我国矿山固体废弃物生产量大、堆存量大、综合利用率低,成为威胁矿山生态环境等问题的关键因素。利用铁矿废石分别与铁尾矿、山皮土、校内土、农场土配制成不同层次的种植混合土,并进行了种植紫花苜蓿的盆栽试验。结果表明:各类种植混合土的化学性质与掺入的细粒成分质地有关,各类种植混合土的化学性质随着加入土类细粒(d<0.075 mm)成分的增加而提高;并且山皮土、校内土、农场土相对于尾矿来说对铁矿废石的改善效果显著;当各类种植混合土细粒成分掺入量约为废石质量的90%时,各类种植混合土养分状况与紫花苜蓿的生长情况与各细粒成分对照差异不显著。更多还原

【Abstract】 Great deal of mining solid wastes in China are generated and stored,with low comprehensive utilization rate. It has become a key factor for threatening the mine ecological environment. So,iron ore waste rock was mixed respectively with iron tailings,hill campus soil and farm soil,to prepare different levels of mixed soil,and medicago sativa were planted on these soils for testing. The results show that,the chemical properties of various mixed soils were related to the texture of incorporated fine grained soil,and its the chemical properties were improved with the increasing of fine grained soil( d < 0. 075 mm); The performance of iron ore waste rock was more significantly improved by mixing with hill soils,campus soil and farm soil than iron tailings; When the incorporation of fine grained soil in all kinds of mixed soil was about 90% of the waste rock in quality,the nutrient of various mixed soils and growth of medicago sativa have no significant difference,compared with the fine grained soils.更多还原