The present study aimed to evaluate the effect of addition of increasing rates of swine manure, mineral fertilizers, and the combination of both on the abundance and diversity of soil macrofauna. The study was carried out in Campos Novos county, in the western Santa Catarina state, on an Oxisol cultivated with corn (Zea mays) and oat (Avena sativa) in succession and no tillage system. Six treatments were used: a control, with no fertilization (TT); mineral fertilization (AM); swine manure + mineral fertilizer (AOM); and swine manure at dry matter rates of 3 t ha-1 (AO3); 6 t ha-1 (AO6) and 12 t ha-1 (AO12). Mineral fertilizer was applied in-furrow, at sowing, and swine manure just after corn sowing. The soil macrofauna was evaluated with a cylinder of 17 cm diameter. Three samplings in the top layer 0-10 cm were carried out: the first in 5/5/2005 (one month after corn harvest), the second in 9/09/2005 (under oat) and the third in 23/1/2006 (under corn). The diversity of organism groups was evaluated by the Shannon, Simpson and Pielou indexes, group richness, abundance and cluster analysis. The relative frequency of the orders was affected by swine manure addition. Hymenoptera and Oligochaeta were the most frequent groups and they varied according to the treatment and sampling time. The greatest diversity in macrofauna was found under the AOM treatment, demonstrating that the soil macrofauna was affected by fertilization.
edaphic fauna; mineral fertilizers; swine manure
