02951naa a2200181 a 450000100080000000500110000800800410001910000170006024500930007726000090017052021800017965300150235970000210237470000170239570000150241270000210242777303210244813148062015-08-17       2008    bl uuuu     u00u1 u    #d1 aALVES, M. V.  aStructure and Macrofauna of a Red Latossol under no Tillage with Pig Slurry Application.  c2008  aThe increase in the feedlot pig production has generated high amounts of manure, being in general applied in agricultural areas as organic fertilizer. However, its excessive or continual use can cause negative environmental impacts, such as unbalanced relations in soil chemical, physical and biological properties, water pollution, losses in crop yields, and decrease in the quality of farming products. The objective of this study was to assess the effects of crescent doses of pig slurry on physical and structural soil properties, and their relation with abundance and diversity of soil macrofauna. The experiment is carried out in Campos Novos, SC, southern Brazil, since November 2001, on a red distroferric latosol. The treatments are: 1) Control (0); 2) Mineral fertilization (MF) 3) organomineral fertilization (OM); 4) 50 m3 ha-1 of pig slurry (50); 5) 100 m3 ha-1 of pig slurry (100); and 6) 200 m3 ha-1 of pig slurry (200). The experimental design was completely random blocks, with four replicates. The crop system was the succession of maize (Zea mays) and black oat (Avena stringosa), under no tillage soil management. Soil samples for physical analyses were collected in January 2006, in the layers of 0-5; 5-10; 10-20 cm depth. The analyzed properties were organic carbon, aggregate stability, soil density, macro, micro and total porosity. Soil macrofauna was collected in the layer of 0-10 cm, in May and September 2005, and in January 2006. The use of pig slurry in rates of 50 and 100 m3 ha-1 decreased soil aggregate stability, in relation to the control treatment. However, this soil can be considered with a good structure, with mean geometric diameter values from 5.9 a 6.3 mm. The other physical properties related to porosity and soil density, as well as, organic carbon contents had no effect of pig slurry application. There was no correlation between soil physical properties and abundance and diversity of soil macrofauna. The treatment MF had the lowest values for ecological index, related to its low macrofauna diversity. The principal component analysis separated the treatments OM and 100 from the others, according to the considered axis.  aMacrofauna1 aARRUDA, C. A. O.1 aMAFRA, A. L.1 aCASSOL, C.1 aSANTOS, J. C. P.  tIn: INTERNATIONAL COLLOQUIUM ON SOIL ZOOLOGY, 15; INTERNATIONAL COLLOQUIUM ON APTERYGOTA, 12., 2008, Curitiba. Biodiversity, conservation and sustainabele management of soil animal: abstracts. Colombo: Embrapa Florestas. Editors: George Gardner Brown; Klaus Dieter Sautter; Renato Marques; Amarildo Pasini. 1 CD-ROM.