ABSTRACT The objective of this work was to understand the relationship between decomposition of leaf litter and climatic elements and determine the mineralization of nutrients in the decomposition process in a fragment of Semideciduous Submontane Forest, located in southern state of of Espírito Santo. Overall, 84 litterbags were deposited in 12 permanent plots, collecting one litterbag per plot for 30, 60, 90, 150, 210, 270 and 360 days after the beginning of the experiment. The leaf material remaining in the litterbag was oven-dried and weighed, with later analysis of nutritional compounds. The leaf litter decomposition rate was 1.42, 75.95% of decomposing litter at the end of the evaluation period. Mineralization occurred in the following order: K, Corg., Mg, S, P, N and Ca. There was a positive correlation of average and minimum air temperature, as well as accumulated precipitation and leaf litter decomposition .

RESUMO O presente estudo teve por objetivo avaliar a produção de mudas de Mimosa setosa a partir do uso de diferentes combinações de substratos, sendo eles: esterco bovino, cama de frango, esterco de codorna e substrato comercial. O experimento foi conduzido no Viveiro Florestal do Centro de Ciências Agrárias e Engenharias da Universidade Federal do Espírito Santo, sendo montado em um delineamento inteiramente casualizado (DIC). Quando as mudas atingiram cinco meses após a semeadura foram mensurados: altura (H), diâmetro do coleto (D), relação altura/diâmetro (RHD), massa seca da parte aérea (MSPA), massa seca do sistema radicular (MSR), massa seca total (MST) e relação entre massa seca da parte aérea e massa seca do sistema radicular (RMSPAR), além do índice de qualidade de Dickson (IQD). Constatou-se que para a produção de mudas de Mimosa setosa recomenda-se a formulação constituída de 25% de substrato comercial + 35% de cama de frango + 40 de terra de subsolo, sendo essa a que proporcionou as melhores médias nas características morfológicas altura, diâmetro do coleto, relação altura/diâmetro, massa seca da parte aérea, massa seca do sistema radicular e massa seca total.

ABSTRACT The present study aimed to evaluate the production of seedlings of Mimosa setosa from the use of different combinations of substrates, namely, cattle manure, poultry litter, quail manure and commercial substrate. The experiment was conducted in the Nursery Center for Agricultural Sciences, at the Federal University of Espírito Santo state, and mounted in a completely randomized design (CRD). When the seedlings reached five months after sowing, the following characteristics were measured: total height, collar diameter, plant height/collar diameter ratio, dry mass of shoot, dry mass of root, total dry mass and dry mass ratio of shoot/root dry mass, along with the Dickson quality index (IQD). It was found that, for the production of seedlings of Mimosa setosa, it is recommended a formulation consisted by 25% of commercial substrate + 35% of poultry litter + 40% of subsoil, having this one the best averages in morphological characteristics total height, collar diameter, plant height/collar diameter ratio, dry mass of shoot, dry mass of root and total dry mass.

A produção de mudas de espécies florestais nativas visa a atender aos plantios, principalmente para fins ambientais, tais como a recuperação de áreas degradadas. Para intensificar os conhecimentos sobre espécies com potencial de recuperação de áreas degradadas, este trabalho teve como objetivo avaliar a utilização de diferentes substratos no crescimento de mudas de Sesbania virgata (Cav.) Pers. Os tratamentos foram formulados utilizando-se lodo de esgoto, fibra de coco, vermiculita e casca de arroz in natura, além do substrato comercial. As mudas foram produzidas em tubetes com capacidade para 120 cm³. O estudo foi constituído de 14 tratamentos, com cinco repetições de cinco mudas cada, totalizando 25 plantas cada tratamento. Após 150 dias da semeadura, foram avaliadas as seguintes características nas mudas: altura; diâmetro do coleto; relação entre a altura da parte aérea e o diâmetro do coleto; massa seca da parte aérea; massa seca do sistema radicular; massa seca total; relação entre a massa seca da parte aérea e a massa seca do sistema radicular, e índice de qualidade de Dickson. Os tratamentos que continham lodo de esgoto e vermiculita em sua composição, sobretudo o tratamento T6 (60% lodo de esgoto + 40% vermiculita), proporcionaram o melhor crescimento das características morfológicas das mudas de Sesbania virgata.

The native seedlings production aims to attend plantings, mainly for environmental purposes, such as the recovery of degraded areas. To enhance the knowledge about species with potential for recovery of degraded areas, this study aimed to evaluate the use of different substrates on the growth of seedlings of Sesbania virgata (Cav.) Pers. The treatments were formulated using sewage sludge, coconut fiber, vermiculite and rice husk in natura, besides the commercial substrate. The seedlings were grown in plastic tubes with a capacity of 120 cm³. The study consisted of fourteen treatments, with five replicates of five seedlings each, in a total of 25 plants per treatment. After 150 days of sowing, the following characteristics were evaluated in seedling: height, stem base diameter, the relation between height and the stem base diameter, shoot dry matter, root dry matter, total dry matter, the relation between the shoot dry matter and root dry matter and Dickson quality index. The treatments containing sewage sludge and vermiculite in its composition, particularly the treatment T6 (60% sewage sludge + 40% vermiculite), provided the best growth of morphological characteristics of seedlings of Sesbania virgata.