The paper comprehensively explains characteristics of content, distribution and migration for 15 nutrient elements in various ecological environment of mire ecosystems which includes soils, plants and surface water in Sanjiang Plain. It has been shown that:( 1 ) In mire soils contents of N,P,K,Na,Zn and Co are relatively rich, and that of Ca,Mg,Fe,Ni and Al are relatively poor. The vertical and horizontal distributions of elements in the mire soils arc shown as stratification and zonation, respectively.(2 )...