Abstract: 【Aim】 To provide references to revealing the response of arthropod diversity to the land management through investigating the diversity and trophic functional group of arthropod communities on the soil surface with different tillage systems in the black soil region of Northeast China. 【Methods】 The pitfall trap method was used in the Hailun Agroecology Experimental Station, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences from July to September in 2012, to investigate the community composition, diversity and functional group structure, and to calculate the relative abundance, richness, Shannon-Wiener diversity index, Pielou evenness index, Simpson dominant index, Cody index and S-rensen index of arthropods on the soil surface with five tillage systems, i. e., no-tillage (NT), reduced tillage (RT), moldboard plough (MP), rotary tillage (ROT) and combination tillage (CT), based on the long-term tillage experiment. 【Results】 A total of 2 942 individuals of soil surface arthropods belonging to 7 orders and 18 families were collected. There were 15, 11 and 11 families under NT, RT and CTM, accounting for 83.34%, 61.12% and 61.12% of the total fauna, respectively. The relative abundance of Coleoptera and Araneae was the highest under the five tillage systems, and Carabidae was the dominant group in the black farmland. The largest values of richness and diversity were found under NT, while the lowest under RT. The results showed that the predators were dominant under all tillage systems except ROT. The analysis of similarities of arthropod community showed that the similarities of soil surface arthropod fauna varied among different tillage systems, with the highest similarity between NT and CT and the lowest similarity between MP and CT. 【Conclusion】 Tillage system could affect surface soil and vegetation micro-environment condition, thus affecting the community composition, population and functional group of arthropods. NT has higher abundance of arthropod group and predatory group, which contributes to conserving arthropod diversity of farmland in the black soil region.

Key words:  Arthropod, species diversity, community structure, tillage system, soil surface, black soil region