摘 要(英文)：The responses of aboveground soil fauna in three native typical forests , monsoon evergreen leaf-broad , pine
and leaf-broad mixed and pine forests (MEBF , MF and PF) in subtropical China to simulated N deposition addition in
more than one year were studied in this paper. Treatments including control (No addition) , low N deposition (50 kg.
hm2 . a - 1) , middle N deposition (100 kg. hm2 . a - 1) , high N deposition (150 kg. hm2 . a - 1) by spreading water
or NH4NO3 . It suggested that there were not significant effects of N deposition addition on soil fauna when the values
averaged across all of the samplings. But when the variances of time dimension were added to , it was clear of the
influences of N treatments. In other words , there were significant interactions between N treatment and forest succession
and the interactions between N treatment and sampling time in a certain forest . For the succession responses , mature
MEBF and primary PF were all sensitive to N deposition addition. On the whole , the treatments produced negative effects
in MEBF , and positive effects in PF , and the distribution pattern of soil fauna in the three forests were changed
drastically. At the same time , the influences of a certain N treatment level on soil fauna varied with forest types : it was
advantaged of low N treatment in MEBF ; in MF , medium N firstly and then low N was favorable ; medium N treatment
consistently advantaged in PF. The effects of N deposition were also varied with sampling times. Because of the
consistently N inputs , the advantage effects of a certain treatment in a certain forest would decrease at last , or even shift
to negative effects and a lower treatment would be favorable at the same time. It indicated that deposited N would be
accumulated in a long time treatment . Comparison between the study and the results from man-made seeding plots were
conducted and the mechanism in the responses of soil fauna to N deposition addition were also discussed preliminaoily.
N沉降增加对森林生态系统地表土壤动物群落的影响