In same kind of soil, DOM reduce Cd adsorption in A horizon greater than in B horizon, it mainly due to the higher TOC content in A horizon.

• 而在北方的中性和碱性土壤中 ；主要表现为抑制作用 .；同一土壤中；DOM对A层土壤中Cd吸附的抑制作用大于B层；这与A层土壤TOC含量较高有关