The content of lead of all forms and water-soluble NH 4

K as well as rapidly available phosphorus was determined through the cultivation of Sajiang black soil

yellow cinnamon soil and red earth with added lead.The feature of form and distribution of added lead and the effect it made to soil nutrient was studied.The result showed: the contents of lead of exchangeable form and residual form were red earth>yellow cinnamon soil> Sajiang black

the contents of carbonate lead were red earth> Sajiang black soil> yellow cinnamon soil

the contents of Fe-Mn oxide-bound lead were red earth> Sajiang black soil> yellow cinnamon soil

and the contents of organic combined lead were red earth> Sajiang black soil> yellow cinnamon soil;the proportion of lead of exchangeable form and residual form rose as the added lead increased

while that of organic combined form lead reduced

the proportion of carbonate combined form lead in Sajiang black soil and that of Fe-Mn oxide-bound form lead in red earth

however

rose as the lead increased when the added lead is less than 500 mg/kg

and reduced when the added lead was more than 500 mg/kg.In the soil where extra lead was added

the concentration of water-soluble NH 4

K rose which increase the risk of efflux. Water-soluble phosphorus and lead ion was consolidated into undissolved lead phosphate

that reduce the concentration of rapidly available phosphorus

decrease the effect of water-soluble phosphorus.