Abstract: The change in litter quality is the main factor influencing the soil animal community in the succession of the Evergreen BroadLeaved Forest in Tiantong. The total density of soil animal community in the litter layer is in a remarkably negative correlation with C/N value of litter (r=-0.681, P<0.001), but in a markedly positive correlation with total phosphorus （TP）content(r=0.762, P<0.001). However, the total number of soil animal group in litter has no marked correlation with all nuritent contents. In the soil in depth of 0~15cm, the total density of soil animal community is remarkably positively correlated with organic matter content（r=0.457, P<0.05）, total nitrogen (TN) content（r=0.463,P<0.05）and total phosphorus (TP) content（r=0.564, P<0.01）. And the total group number is noticeably positively correlated with TP and TN. Furthermore, there are different correlations between density of main soil animal groups and nutrient contents. In the litter, the density of Acarina and Collembola are extremly markedly positively correlated with TN content and TP content of litter. In the soil, that of Acarina does. However, that of Collembola appears negetive correlation with all soil nutrient contents. Hymenoptera in the litter and soil are markedly positively correlated with TP content. The density of Symphyla in the litter and that of Nematoda, Enchytraeidae and Coleoptera in soil have respectively profoundly positive correlations with all litter nutrient contents and soil nutrient contents.

Key words: litter, nutrient content, succession, Tiantong, soil animal, litter, nutrient content, succession, Tiantong