Macrofauna edáfica como bioindicadora da qualidade do solo em diferentes sistemas de manejo

Le résumé fourni par la source

Soil management systems can alter the soil fauna compound by organisms of high sensibility to the agricultural practices, especially those practices that interfere with the soil structure. Thus, this study's objective was to evaluate the diversity of soil macrofauna at different soil depths and management systems. A 4×3 factorial scheme [four soil managements: 1- no-tillage system (NTS) implemented 6 years ago (NTS6), 2- NTS for 17 years (NTS17), 3- conventional planting system (tillage) for 20 years (CTS) and 4- native forest for 20 years (NF20); three soil depths: 0-0.1; 0.1-0.2 and 0.2-0.3 m] was set in a completely randomized design with five replications in an area of the Cerrado biome. The monolith method was used to sample the macrofauna from the litter and soil, where the number of individuals, total richness (TR), Shannon (SI) and Pielou (PI) indexes were quantified. TR values at a depth of 0-0.3 m were higher in the NTS6 and NTS17. The highest densities of individuals and TR occurred in the litter of NTS6. In the NTS17, at 0-0.1 m, the highest TR, SI and PI were recorded among the management systems. The TR, SI, PI values and the analysis of vertical distribution by Cluster, demonstrated that NTS areas are similar to the NF20 at all soil depths evaluated. The NTS areas presented the highest macrofauna indexes compared the CTS.

Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.