Carbono estocado acima do solo por um sistema agroflorestal sucessional na mata atlântica

Abstract

The objective of this work was to quantify the carbon stored above ground by the arboreal component of the successional agroforestry system (SAF) of the UTFPR-DV, with 8 years of age, identifying as species and ecological groups that stand out to store carbonforsubsidyof futureprojects of Clean Development Mechanisms (CDM). The census provides the presence of 7350 individualsha-1in the SAF with total height (Ht) ≥ 1.30 m, divided into 49 species and belonging to 26 botanical families, which were object of phytosociological analysis, with emphasis on Musa paradisiaca L. with 4,956 specimens. First, the dry biomass of the bole of each individual (BF) was obtained, then specific allometric equations were applied for Mimosa scabrellaBentham., Euterpe edulisMart., Schinus terebinthifoliusRaddi., Araucaria anfustifolia(Bertol.) Kuntze and Musa paradisiacaL; and regional and pan-tropical generic allometric equations for the entire dataset, comparing with the BF value found. The biomass values found were converted into stored carbon using the 0.5 factor.The species that stood out were Solanum mauritianumScop. (2.6 t C ha-1), Persea americanaMill. (1.96 t C ha-1), Musa paradisiacaL. (1.31 t C ha-1) and Carya illinoinensis (Wang.) K. (1.11 t C ha-1). Of the total of 15.35 t C ha-1stored in the SAF, the ecological succession group of pioneer species was responsible for 7.44 t C ha-1, followed by the group of early secondary ones with 4.17 t C ha-1and by the late secondary group with 3.15 t C ha-1.The climax group was responsible for storing only 0.39 t C ha-1. Of the allometric equations used in this work, the regional generics by Vismara (2013) and Gusson (2014) and the pan-tropical ones by Chave et al. (2005; 2014) were the ones that presented results more consistent with the BF value, being recommended for estimates in SAF's with designs similar to the one in this study.