MORPHOMETRIC VARIABLES OF THREE FOREST SPECIES IN AN AGROFORESTRY SYSTEM

Abstract

The objective of this work was the morphometric analysis of three forest species: African mahogany (Khaya ivorensis), Seringueira (Hevea brasiliensis) and Teak (Tectona grandis). The work was carried out in the municipality of Monte Alegre – PA in June 2017 for three days, in an area of 90 hectares, divided into 6 SAFs, where 20 individuals of rubber trees were used, 40 teak and 60 African mahogany (20 individuals in each SAF). For the morphometric analysis, it was calculated the Cup (A), Cup Volume (VC), Cup Ratio (PC), Slenderness (GE), Protrusion Index (IS), Coverage Index Formal Cup (FC), Mean Annual Height Increase (IMA - HT) and Mean Annual Increase of Diameter (IMA - DAP). It was observed that the African mahogany has a higher value of commercial height (6,81 m) and diameter (0,33 m), and the rubber tree showed higher values of IMA-HT (2,41 m / year), IMA-DAP (0,035 m / year), CI (9,82 m), CC (12,05 m) and DC (8,85 m). The three species studied showed no differences in the values of GE, FC, IS. Teak obtained higher AI (0,56 m / m). Due to the good results of IMA, the rubber tree can be used in reforestation in the short term. African mahogany and teak have demonstrated suitability for densely planted, intercropping or non-intercropping.KEYWORDS: Agroforestry, Agroforestry System, Morphometry.