电解锰渣改良基质对牧草生长及锰、镉淋溶迁移的影响

Effect of modified electrolytic manganese slag substrate on growth ofpasture and leaching migration of Mn and Cd

在盆栽条件下采用生物质炭、熟石灰、生物质炭与熟石灰混合改良剂对电解锰渣进行改良,在改良后的基质上种植黑麦草和白三叶两种牧草,研究不同改良剂改良的基质对牧草生长的影响以及镉、锰在植物和环境中的迁移情况。研究结果表明:3种改良剂改良的基质不同程度地降低了两种草种的出苗率,但是可显著增加牧草的株高和生物量,特别是生物质炭与熟石灰混合改良剂;3种改良剂改良的基质均能降低牧草中的锰、镉含量,其中生物质炭的改良效果最好;在3种改良剂改良的基质上种植牧草,均有效降低了锰和镉的淋溶迁移,其中生物质炭和熟石灰混合改良剂最能有效减少锰和镉的溶出。

There are three kinds of ameliorant,such as biomass charcoal,hydrated lime and the mixed ameliorant of biomass charcoal and hydrated lime,were used to modify electrolytic manganese slag under pot condition.Then the ryegrass and white clover were planted on the modified substrates.The effects of different modified substrates on the growth of pastures and the migration of Mn and Cd in the environment were researched.The result of research showed:a)The improvement of three ameliorants reduced the seedling emergence rate of two grass species.And different ameliorants has different effect.But the plant height and biomass of pastures is be significantly increased,especially the mixed ameliorant of biomass charcoal and hydrated lime.b)All three kinds of ameliorant could reduce the contents of Mn and Cd in pastures,among which biomass charcoal has the best effect.c)Three kinds of ameliorant were used to improve the leaching migration of Mn and Cd in the planed pastures,among which the mixed ameliorant of biomass charcoal and hydrated lime were the most effective modification to decrease Mn and Cd into the environment.