Banca de DEFESA: BRUNO FERNANDES VERAS

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : BRUNO FERNANDES VERAS
DATE: 30/08/2024
TIME: 08:00
LOCAL: Instituto de Ciências Agrárias
TITLE:

VOLUME YIELD QUANTIFICATION FOR PLYWOOD VENNER OF PARICÁ (Schizolobium parahyba var. amazonicum) IN A LIVESTOCK-FOREST INTEGRATION SYSTEM IN THE MUNICIPALITY OF ABEL FIGUEIREDO, PA

KEY WORDS:

Forest inventory. Stem form study. Laminated panels.

PAGES: 72
BIG AREA: Ciências Agrárias
AREA: Recursos Florestais e Engenharia Florestal
SUBÁREA: Manejo Florestal
SPECIALTY: Dendrometria e Inventário Florestal
SUMMARY:

Paricá (Schizolobium parahyba var. amazonicum) is a promising species for reforestation because of its rapid growth in height and diameter. The characteristics of its wood allow it to be used for various purposes, with emphasis on the panel industry. To maximise and diversify production, the wood from the same trunk can be used for more than one segment. As a result, the use of stem tapering equations to quantify multiple wood products from the desired forest species has intensified. This study aimed to adjust and compare different tapering equations to determine the volume and variety of products and lamination efficiency in a paricá (Schizolobium parahyba var. amazonicum) plantation inserted into a livestock and forest integration system. The study was carried out on a farm located in the municipality of Abel Figueiredo, in the south-east of Pará. The paricá plantation was planted on 50 ha in a Cattle-Forest Integration cropping system. Part of the forest was planted in January 2019, with a spacing of 3,5 x 3,5 m, while the other was planted in February 2020, with a spacing of 4 x 2 m between trees. The forest inventory was carried out in 53 500 m² circular plots, where the DBH of all the trees and the total height of X trees in all the plots were measured. These same trees were cubed non-destructively using a Criterion RD 1000 optical dendrometer. 50% of the data collected was used for adjustment and 50% for validation. Three equations were tested to estimate each of the following dendrometric variables: total height, individual volume and taper. The adjusted coefficient of determination, standard error of the estimate in percentage, Akaike information criterion, Bayesian information criterion and the graphical distribution of the residuals were used to select the best-adjusted model. The forest's diametric distribution was modeled using the Weibull probability function. The Stoffels and von Soest, Spurr and Schöepfer models were selected respectively to adjust the hypsometric, volumetric and tapering relationships. The estimated volume of the plantation was 92.9031 m³, for an inventory error of 7,42%. The first stratum had 1.834 logs and 34,98 m³ ha^-1 of rollable volume and 101,16 m³ ha^-1 of residue, while the second had 1.712 logs with 33,19 m³ ha^-1 of rollable volume and 95,97 m³ ha^-1 of residue. The third stratum had 134 logs from assortment 1 and 9.101 logs from assortment 2, with 222,33 m³ ha-1 of laminable volume and 117,05 m³ ha^-1 of residue. The lamination yield of the first stratum was 84,3% for logs from Assortment 1, while the second stratum was 90,6% for Assortment 1 and 84,3% for Assortment 2. The third stratum yielded 91,5% for Assortment 1 and 87,1% for Assortment 2. The tapering functions proved to be an alternative for estimating the volume of trees, multiproducts and yield in paricá lamination, demonstrating the feasibility of implementing the species in a Livestock-Forest Integration system for commercial purposes in the laminate industry.

COMMITTEE MEMBERS:
Presidente - 2410727 - LINA BUFALINO
Interna - ***.866.002-** - FRANCIMARY DA SILVA CARNEIRO - UFRA
Interno - 1358527 - WALMER BRUNO ROCHA MARTINS
Externo ao Programa - 1551175 - RODRIGO SILVA DO VALE - UFRAExterna à Instituição - MICHELLINY PINHEIRO DE MATOS BENTES - EMBRAPA