Decomposição da biomassa foliar e liberação de nutrientes envolvendo espécies arbóreas nativas em sistema agroflorestal biodiverso

Abstract

Agroforestry systems (AS) have now been a promising sustainable alternative to promote soil fertility and conservation mainly due to the absence of conventional agricultural practices that are aggressive to the environment, and economically viable because it is possible to obtain income from food production that is consortium with forest production. In this sense, this study aimed to evaluate the decomposition of biomass and the release of nutrients from leaves of different tree species present in a Biodiverse Agroforestry Systems located in Emprapa Agropecuária Oeste. In order to evaluate the decomposition of 11 native tree species of a Biodiverse Agroforestry Systems, 264 litter bags were installed, 44 of which were removed at intervals of 30, 60, 90, 120, 150, 180 days, using a completely randomized design (DIC). In the analysis of the decomposition, the samples were conditioned in an oven for drying and then weighed to measure the remaining mass. All the species evaluated in this study are potential for composition of Biodiverse Agroforestry Systems. The species, Maclura tinctoria, Schinus terebinthifolia, Croton urucurana and Celtis iguanea, presented rapid decomposition of the biomass. The highest release of the macronutrients N, P, K, Ca and Mg was observed in the species Maclura tinctoria, Schinus terebinthifolia, Croton urucurana.