摘要
针对钒钛磁铁尾矿库沉积滩浅表层尾矿的土壤特性,采用有机生物菌肥、团粒促进剂、抗旱保水剂为主要改良材料,辅以速效复合肥对尾矿进行原位改良,通过三因素二水平正交试验设计,将钒钛磁铁尾矿与改良材料混合后制成不同配比的人工土壤,选用羊胡子草、牛筋草等8种乡土耐受性植物,通过测试分析和种植试验,研究尾矿改良的人工土壤理化性质和植物生长特征。结果表明:钒钛磁铁尾矿经原位改良的人工土壤质量符合绿化种植土壤标准,种植的乡土植物具有较好的成活率和覆盖度,能满足尾矿库闭库复垦的要求,表层人工土壤的较优配比为有机生物菌肥12%、团粒促进剂0.4%、抗旱保水剂0.05%、速效复合肥0.6%;底层人工土壤的较优配比为有机生物菌肥4%、团粒促进剂0.8%、抗旱保水剂0.2%、速效复合肥1.2%。
Aiming at the soil characteristics of the shallow surface tailings in the sedimentary beach of the V-Ti magnetite tailings pond,organic biological fertilizer,pellet promoter,as well as drought resistant and water retaining agent were used as the main improvement materials,supplemented by quick acting compound fertilizer,in-situ improvement was carried out on the tailings.The orthogonal experimental design with three factors and two levels was conducted.V-Ti magnetite tailings were mixed with improved materials to produce artificial soil with different proportions.Eight native tolerant plants,such as Carex rigescens and Eleusine indica(L.)Gaertn.,were selected.The physical and chemical properties as well as plant growth characteristics of artificial soil improved by tailings were studied through test analysis and planting experiments.The results show that the quality of artificial soil improved in situ from V-Ti magnetite tailings is in line with the planting soil standard,and the plants have good survival rates and coverage,which can meet the requirements of closure and reclamation of tailings pond.The optimal proportion of surface artificial soil is 12%of organic biological fertilizer,0.4%of pellet accelerator,0.05%of drought resistant and water retaining agent,and o.6%of quick acting compound fertilizer.The optimal proportion of bottom artificial soil is 4%of organic biological fertilizer,0.8%of pellet accelerator,0.2%of drought resistant and water retaining agent,and 1.2%of quick acting compound fertilizer.
作者
成词峰
刘文连
安家金
戴仕鹏
赵海燕
宁飞
CHENG Cifeng;LIU Wenlian;AN Jiajin;DAI Shipeng';ZHAO Haiyan;NING Fei(Kunming Prospecting Design Institute of China Nonferrous Metal Industry Co.,Ltd.,Kunming,Yunnan 650051,China;Yunnan Key Laboratory of Geotechnical Engineering and Geological Disasters,K unming,Y unnan 650051,China)
出处
《矿业研究与开发》
CAS
北大核心
2023年第4期160-165,共6页
Mining Research and Development
基金
中国铝业集团青年科技人才启明星计划项目(2019MXJH31)
云南省岩土工程与地质灾害重点实验室科技计划项目(2021YN01A3)。
关键词
钒钛磁铁尾矿
原位改良
生态闭库
种植试验
V-Ti magnetite tailings
In-situ improvement
Ecological closure of tailings pond
Planting experiment
