Abstract
This work aimed to evaluate edaphic macrofauna under different soil use systems. Two systems were evaluated: conventional system, no-till, continuous grazing, crop-cattle integration, eucalyptus and native vegetation. Sampling was carried out in five points at one transect per system. Organisms were manually extracted and identified to the level of broad taxonomic groups. Native vegetation did show the highest variety of edaphic macrofauna groups when compared to monocultures and/or high intensity of soil tillage. Among cropped systems, the highest density of edaphic macrofauna organisms was observed in crop-cattle integration and continuous grazing systems. The total density of individuals and the macrofauna group richness were not influenced by soil physical attributes. Regarding to chemical attributes, only the group richness was correlated to some of such proprieties.
Highlights
Os componentes vivos do solo incluem as raízes, a microfauna, a mesofauna e a macrofauna (Lavelle e Spain, 2001)
Native vegetation did show the highest variety of edaphic macrofauna groups when compared to monocultures
the highest density of edaphic macrofauna organisms was observed in crop-cattle integration
Summary
Este trabalho é resultado de um estudo realizado no município de Maracaju, Estado do Mato Grosso do Sul (latitude 21o36'52'', longitude 55o10'06'' e altitude de 384 m), no mês de dezembro de 2004, cujo clima é caracterizado como Cwa (Köppen), subtropical com chuvas de verão e verões quentes, (Ayoade, 1986). A seqüência de culturas utilizadas na safra de verão foi soja/algodão/soja/pastagem e, no inverno, pé-degalinha/aveia + tanzânia/milho safrinha + tanzânia + braquiária/pastagem; e 5) eucalipto (E) - área estabelecida há 9 anos com plantio de eucalipto, sendo aplicados calcário e adubo apenas na época do seu Macrofauna edáfica sob diferentes manejos estabelecimento. Caracterização química do solo sob plantio convencional (PC), plantio direto (PD), pastagem contínua (P), integração lavoura/pecuária (I), eucalipto (E) e vegetação nativa (VN), Maracaju, Estado do Mato Grosso do Sul. Tabela 2. Caracterização física do solo sob plantio convencional (PC), plantio direto (PD), pastagem contínua (P), integração lavoura/pecuária (I), eucalipto (E) e vegetação nativa (VN), Maracaju, Estado do Mato Grosso do Sul. Ds Macro Micro VPT Argila Areia Silte kg dm-3 1,14 0,21 1,30 0,12 1,31 0,13 1,42 0,10 1,76 0,15 1,37 0,19.
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