Results
Soil
nematode abundance and diversity
The abundance of total nematodes and of BF and OP groups significantly
decreased with soil depth (Fig. 1). Two-way ANOVAs showed that N loading
significantly changed BF (P <0.01) and PF
(P =0.02) groups. At 0-20 cm depth, N3 significantly increased the
abundance of total nematodes and of BF and FF groups but significantly
decreased the abundance of PF group.
Two-way ANOVAs indicated that soil nematode diversity was not
significantly affected by N loading but was significantly affected by
soil depth (Fig. 2). The Shannon-Weiner (Fig. 2a) and Margalef richness
indices (Fig. 2d) decreased with soil depth, while the Simpson dominance
index (Fig. 2c) increased with soil depth.
Nematode