The content of soil heavy metals

Cu

Zn

Pb

Ni

Cd

Cr

Hg

As and part physical and chemical properties of the soil were determined and analyzed in the area in Liupanshui city of Guizhou province

then the appraisal for heavy metals pollution was made.The result is showed as follows: the content of Cu

Cr

Hg in the mireral slag is low

with their pollution indices lower than 1

while that of Zn

Pb

Ni

Cd

As is much higher

which single pollution index is 2.95

45.14

1.00

10.67

50.41 respectively

and the comperhensive pollution index is as high as 36.98

attributed to the string pollution resource.At the same time

the comprehensive pollution index for the soil is between 0.77 and 1.99

among which the samples with the index lower than 1 account for 50%

while proportion with the index between 1 and 2 is 50%.That result indicates that only part soil is polluted by heavy metal in low grade in the area.Therefore

proper technology of reclamation and improvement and utilizition way should be taken to ensure the soil to restore its ability to producting in argriculture in this area.