不同厚度黑土覆盖对苏打草甸碱土修复效果的影响

Effect of different thickness black soil cover repair impacts to soda meadow alkaline soil

将建筑工地表层(0～20 cm)黑土直接覆盖碱斑之上,对土壤pH、电导率、阳离子交换量、碱化度以及牧草产量等参数进行统计分析。结果表明,黑土覆盖厚度与土壤pH、电导率和碱化度均存在极显著的指数负相关关系;结合试验供试土壤性质和牧草生长状况,实现苏打草甸碱土地面植被快速恢复,覆盖厚度不得低于6 cm。

The experiment covered alkaline spot with surface layer black soil in construction site,made analysis with soil pH,electric conductivity,CEC,ESP and pasture yield.The results showed that covering thickness of black soil had distinct exponential function negative correlation with soil pH,electric conductivity and ESP;considering the character of testing soil and status of pasture growth,to repair the plant in soda meadow alkaline rapid,and the thickness should be more than 6 cm.