The contents of Cu,Pb,Zn,Cd and other heavy metals in soil and plant were investigated in the experiment field planted by buckwheat with different fertilization in the collapsed coal mining area located in Xiyu,Taiyuan.The heavy metal absorption by buckwheat under different fertilization modes was discussed.Single factor index method was used for evaluating soil quality,bio-accumulating coefficient for discussing metals enrichment by plants,and Hakanson ecological risk index method on soil potential for eco...