This study objective is to explore effects of plant on spatial distribution of soil nutrients and soil nematode community and to use nematode group to indice recovery mechanism of ecological system on sand dune. Soil nutrients and soil nematode community were researched in different slopes, different depths and shrub influences on Horqin sand land which were planted vegetation for fixing sand dune 25 years ago. The results showed that:
(1) Contents of NO3--N, NH4+-N and total N descreased with soil dept...