Abstract The study evaluated the ecology of soil invertebrate faunal communities in periodically flooded forest (CF) fragments and anthropic fields (AF) in the Atlantic Forest. The sampling occurred in the rainy and dry seasons using pitfall traps. We estimated the total activity, richness, diversity, and evenness as well as the activity of the taxonomic and functional groups. Total activity and richness varied as a function of seasonality. Entomobryomorpha, Poduromorpha, and Symphypleona were the most representative taxonomic groups. Enchytraeidae and Blattaria were exclusive to CF. Auchenorrhyncha, Chilopoda, Heteroptera, and Thysanoptera were exclusive to AF. The functional group of microphagous/saprophagous (M/S) showed the highest activity, independent of the environment and season. Greater dissimilarity was observed among the invertebrate fauna in AF when compared to CF. Periodically flooded areas favored groups from the saprophagous trophic guild, while AF areas favored predator and herbivore groups. Soil fauna present in forest environments presented less seasonal variability.

Abstract This study evaluated the production of Inga laurina (Sw.) Willd seedlings in 110 and 280 cm3 tube containers and growing doses (0, 3, 6 and 12 kg m-3) of controlled-release fertilizer (CRF) (15-09-12) and their performance at 5 and 12 months after outplanting. The experiment was conducted using a randomized split-plot design, in a 2 x 4 arrangement (tube volumes x CRF doses). Stabilized sewage sludge from urban origin was used as substrate. It was assessed growth and biomass of the seedlings in nursery, as well as survival and growth after outplanting. Containers of 280 cm3 and doses between 6 to 12 kg m-3 produced seedlings in less time, with higher growth and biomass. At 12 months after outplanting, seedlings presented acceptable growth and mortality rate with doses equal or greater than 6 and 3 kg m-3 of CRF, respectively, for the 110 and 280 cm3 tube.

RESUMO A matéria orgânica do solo (MOS) e os atributos químicos do solo são importantes indicadores de qualidade de solo. Esse estudo teve como objetivo avaliar os efeitos de estratégias de controle de plantas espontâneas em uma área de restauração florestal sobre a qualidade da MOS e a fertilidade do solo. Para isso, foram estabelecidos três métodos de controle de plantas espontâneas: i) mecânico (MEC); ii) químico (QUI) e, iii) químico-cultural (QC) avaliados em um delineamento em blocos casualizados. Após 13 meses foram coletadas amostras de solo (0-10 cm) nas quais se determinaram a respiração basal por 21 dias; o carbono orgânico total (COT), o carbono lábil (CL); as frações químicas da MOS [humina (H), ácido húmico (AH) e ácido fúlvico (AF)] e a fertilidade do solo. Nos dias 1, 3 e 7 foram verificados maiores valores de respiração basal do solo, contudo, não foram encontradas diferenças entre as estratégias de controle. Foram verificadas pequenas alterações na qualidade da MOS e fertilidade do solo. O MEC apresentou valores (até 11 %) mais elevados de CL, propiciado pela intensificação dos tratos silviculturais. Todas as estratégias de controle da vegetação espontânea após 13 meses de aplicação mostraram-se positivas com relação à qualidade da MOS e a fertilidade do solo, com destaque para o CL, devido a sua relação com o acumulo ou perda da MOS e a imediata resposta as alterações no uso e manejo do solo.

ABSTRACT Soil organic matter (SOM) and the chemical attributes of the soil are important indicators of soil quality. The aim of this study was to evaluate the effects of strategies for controlling spontaneous plants on SOM quality and soil fertility in an area of forest under restoration. Three methods for controlling spontaneous plants were established: i) mechanical (MCH), ii) chemical (CHM), and iii) chemical-cultural (CC), and evaluated using a randomized block design. After 13 months, soil samples were collected (0-10 cm) to determine basal respiration over 21 days, total organic carbon (TOC), labile carbon (LC), chemical fractions of the SOM [humine (H), humic acid (HA) and fulvic acid (FA)], and soil fertility. On days 1, 3, and 7, higher values were seen for basal soil respiration, however, no differences were found between the control strategies. There was a small change in SOM quality and soil fertility. MCH showed higher values (up to 11%) for LC, due to the intense silvicultural management. After 13 months of application, each of the strategies for controlling spontaneous vegetation proved to be favorable in relation to SOM quality and soil fertility, especially for LC, due to its relationship with the accumulation or loss of SOM, and immediate response to changes in land use or management.