摘要
为研究生污泥、腐熟污泥和冻融污泥三种污泥在煤矸石山复垦中的应用效果,将污泥与粉煤灰、煤矸石和土壤按一定比例混配成复混基质并划分种植小区,种植黄花草木樨(Melilotus officinalis)、沙打旺(Astragalus adsurgens Pall.)和敖汉苜蓿(Medicago sativa cv.‘Aohan’)三种豆科牧草,对基质的理化性质、重金属元素含量和牧草的田间出苗率、株高、根长和根冠比进行测定分析。结果表明,添加生污泥和腐熟污泥的复混基质A1、A2、B1和B2在基质理化性质、重金属含量和对牧草生长影响方面均表现良好,其中添加腐熟污泥的无土基质B2(腐熟污泥、粉煤灰和煤矸石的质量配比为30∶10∶60)最好;考虑到污泥腐熟和客土运输的成本,添加生污泥的无土基质B1(生污泥、粉煤灰和煤矸石的质量配比为30∶10∶60)可作为煤矸石山复垦的最优选择。
To study the reclamation effect of raw sludge,compost sludge and freeze-thaw sludge in the coal gangue mountain,three legume forages including Melilotus officinalis,Astragalus adsurgens Pall.and Medicago sativa cv.‘Aohan'were planted on the compound-mixed substrates made up of sludges,coal gangue,fly ash,and soil,then the physical and chemical properties,and heavy metal contents of the substrates,the field seedling emergence,plant height,root length,and root-shoot ratio were measured.The results showed that the physical and chemical properties,and heavy metal contents of compoundmixed substrates A1,A2,B1,and B2,containing raw sludge or compost sludge,were better than other substrates,and were more beneficial to the growth of forages.The soilless compound-mixed substrate B2(the quality ratio of compost sludge,fly ash,and coal gangue was 30:10:60)was the optimal substrate.Considering the costs of sludge compost and soil shipping,soilless substrate B1(the quality ratio of raw sludge,fly ash,and coal gangue was 30:10:60)was the optimal choice for the coal gangue mountain reclamation.
出处
《北京农学院学报》
2015年第3期96-102,共7页
Journal of Beijing University of Agriculture
基金
大同煤矿集团有限责任公司科研项目(2054115086)
2014年北京农学院学位与研究生教育改革与发展项目(5095237001/195)
关键词
生污泥
腐熟污泥
冻融污泥
煤矸石
粉煤灰
土壤
复垦
raw sludge
compost sludge
freeze-thaw sludge
coal gangue
fly ash
soil
reclamation
