Quantificação de biomassa e de nutrientes na serapilheira em trecho de Floresta Estacional Semidecidual Submontana, Cachoeiro de Itapemirim, ES

• Ano de defesa: 2011
• Autor(a) principal: Godinho, Tiago de Oliveira
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal do Espírito Santo; BR; Mestrado em Ciências Florestais; Centro de Ciências Agrárias e Engenharias; UFES; Programa de Pós-Graduação em Ciências Florestais
• Palavras-chave em Português: Climate variables; Organic carbon; Sampling of litter; Nutrients cycling; Amostragem de serrapilhadeira; Carbono orgânico; Ciclagem de nutrientes; Variáveis climáticas; Serapilheira; Biogeoquímica; Carbono; Nutrientes; Ecologia florestal; Cachoeiro de Itapemirim (ES); Recursos Florestais e Engenharia Florestal; 630
• Link de acesso: http://repositorio.ufes.br/handle/10/5803

This work aimed to study the deposition and accumulation of litter and nutrients it contains in the Submontane Seasonal Semideciduous Forest, located in the city of Cachoeiro de Itapemirim, ES. A sampling of deposition and accumulated litter was performed in 12 fixed area plots (20 m x 50 m), and were distributed systematically in the field, totaling 1.2 ha of sampled area. In each of the 12 plots were distributed five litter deposited collectors in a systematic way, wooden structure built in the square format with 0.5 m x 0.5 m and 0.75 m above the ground, with screens of nylon mesh 2 mm, a total of 60 collectors, which was performed monthly collection of litter deposited on the collectors. After collection, samples were taken immediately to the laboratory where they were separated into fractions leaves/miscellaneous and branches. The amount of litter deposited on the collector was measured to megagram per hectare per month (Mg.ha-1.mês-1). Were determined the nutrient content and organic carbon contained in the litter and nutrient use efficiency. In each of the 12 plots of this study were collected monthly on the floor of the forest, 12 samples of litter accumulated at random, with the aid of a metal template of 0.25 m x 0.25 m, which was released on forest floor total of 144 samples in each month of this study. It was determined the levels of macronutrients (N, P, K, Ca, Mg, S), micronutrients (Fe, Cu, Mn, Zn, B) and organic carbon (OC) of litter deposited and accumulated. The study of the deposition and accumulation of litter in the forest was analyzed according to completely randomized design with 12 treatments (months of the year) and 12 repetitions (for calculation purposes, the collectors were joined in the plot, and each installment became a repeat). The deposition and accumulation of litter was found to be seasonal, with higher production and accumulation occurring at the end of the dry season and lower air temperatures. The forest in question produced in the course of a year 9.3 Mg.ha-1 of litter, and received an average of 5.5 Mg.ha-1 of litter accumulated. The total return of nutrients was 511.80 kg.ha-1.year-1, being 506.62 kg.ha-1.year-1 of macronutrients and 5.18 kg.ha-1.year-1 of micronutrients. The contribution of litter and its subsequent decomposition are responsible for large amounts of nutrients in the topsoil, conditioning an improvement in fertility