03183naa a2200181 a 450000100080000000500110000800800410001910000220006024500910008226000090017352023850018270000230256770000220259070000220261270000230263470000230265777303210268013148852008-09-22       2008    bl uuuu     u00u1 u    #d1 aBIANCHI, M. de O.  aSoil macrofauna response to different proportions of legume trees in land reclamation.  c2008  aSoil biota is the major responsable for the regulation of various processes such as decomposition, mineralization and nurient cycling wich affect the plant growth and the production maintenance in long-term (LAVELLE, 1997). The aim of this study was to evaluate the influence of planting legume trees as an estrategy for land reclamation above soil macrofauna. The study area includes a slope, at the Municipality of Valença, Rio de Janeiro state ? Brazil, originally in the Atlantic Forest Biome, but under a secondary sucession process. In the experimental area it was introduced seven tree fixing nitrogen legumes species in four proportions of the total number of trees planted: 0% (0L), 25% (25L), 50% (50L) and 75% (75L). Other samples were taken in a secondary forest, and in two areas of pasture, an abandoned pasture (Pasture B), with spontaneous vegetation, grass and some bushes, and other pasture that is regularly grazed by animals, with predominance of Brachiaria grass ( Pasture A). The sampling occurred at the end of the dry season, using the method TSBF (ANDERSON & INGRAM, 1993) at depths of 0-10 cm, 10-20 cm and 20-30 cm, and the litter layer. Treatment 50L had the lowest total fauna groups richness and at the same time that showed the highest macrofauna density, mainly because of the Formicidae dominance. However, in the treatments 25L and 75L it was observed the lowest abundance and in contrast the greatest groups richness what suggests that they contribute to the better soil fauna colonization. Analyzing the macrofauna vertical distribution, in the almost all areas the largest abundance of organisms occurred in the soil superficial layer (0-10 cm), exception for 25L and 75L treatments. The soil fauna colonization of this layer raised 70% in Pastures A and B. This similarity observed in vertical distribuition between the forest and pastures, suggests an influence of the sampling period, that took place after the dry season, when the vegetation was very affected. The number of individuals present in the 10-20 cm depth proved to be roughly similar for all treatments, while the greatest abundance in 20-30 cm was observed in 75L treatment. The soil fauna diversity was similar among treatments, with the predominance of the family Formicidae, followed by Isoptera, characterizing the intense colonization of social insects in these systems.1 aOLIVEIRA, I. P. de1 aCORREIA, M. E. F.1 aRESENDE, A. da S.1 aCAMPELLO, E. F. C.1 aSILVA, E. M. R. da  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.