Abstract: Taking Manghailinzi village of Liuhe basin in the Zhangwu county, Liaoning Province as an example, the effects of different land use patterns on the six kinds of enzyme activities of aeolian sandy soil of the area were studied. The results showed that enzyme activity was at the lowest level because of sparse vegetation and few creatures in bare land. Enzyme activity of flood land was also at the lowest level because of the special geographical location of flood land where the soil was easily washed by river water. The flood land is not suitable for reclamation of cultivated land because farming would affect the releasing of flood water. Enzyme activity of farmland in non-flood land was in the middle level because cultivation and harvesting exacerbated soil erosion process and reduced the enzyme activity. The land was suggested to lie fallow. Enzyme activity of natural grassland was at the higher level, which illustrated natural grassland can improve the aeolian sandy soil enzyme activity to a certain extent. Due to soil surface litter and humus accumulation, adequate nutrition and better hydrothermal conditions, the enzyme activity in forest land was at the highest level. Therefore, the effect of improving sandy soil enzyme activity was the most obvious through planting poplar.

Key words: land use patterns, aeolian sandy soil, enzyme activity of soil, Liaoning