Incremento médio anual de espécies comerciais e a legislação

Abstract

The Sustainable Forest Management plan (PMFS) for tropical forests has general extraction parameters that disregard the specificities of phytophysiognomies and forest species. The general objective of the study was to compare the average annual increase in volume (IMAv) of commercial timber species in relation to the parameter defined by law for PMFS. The study was carried out in 38 permanent plots of a PMFS in the municipality of Tabaporã-MT in the years 2009, 2013 and 2018. After measurement, the selection of commercial species and species occurring in the three periods was carried out. Once selected, the IMAv was estimated per period, with subsequent segregation of these into three groups. The species with the highest IMAv per group was compared to the legislation's IMA. Regardless of the species, group and monitoring period, the lowest IMAv value was for Cambará and Cedrinho with 0.1360 m3 ha-1 year, while the highest was for Amescla with 0.4885 m3 ha-1 year. The results demonstrate that all species presented an IMAv lower than that indicated in the legislation (0.86 m3 ha-1 year), statistically differing from this. Therefore, the need to define parameters that take into account the characteristics of species and forests, taking into account their particularities, is evident. Keywords: PMFS, management, Sustainability, tropical florests.