Experimental Study On The Planting Crops Safety Of The Overlying- Loess Tail Slag

In order to study Xiaoqinling gold mine area of heavy metals enrichment in soil and crops in different soil parent material and anti -pollution intensity. We carry field investigation and tail slag field trials. comparative study by collecting and testing the heavy metals contents of soil and grain of corn and wheat crops planting on covering-loess Tail slag, The field trials about covered the different thickness Eolian loess on the tail slag, The result showed: (1) From the elements, especially Hg, Pb elements, under cover of heavy metals from tailings migration in wheat grain than to corn. And not all metals are increased with the thickness of the overlying soil, heavy metal migration force crop seeds decreased.(2) The safety thickness soil planting corn, wheat crops are acuity 30 cm on tail slag. The enrichment of heavy metals on tail slag of overlying soil planting crops, largely controlled by the tail slag, air pollution and plants to heavy metals have chosen.