Banca de DEFESA: JONATHAN DIAS MARQUES

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : JONATHAN DIAS MARQUES
DATE: 28/08/2024
TIME: 08:00
LOCAL: google meet
TITLE:

UNDERSTANDING THE EFFECTS OF FERTILIZATION AND SOIL TEXTURE ON TREE GROWTH AND WOOD QUALITY OF Tachigali vulgaris FOR BIOENERGY

 

KEY WORDS:

Energy forests. Non-destructive methods. Amazonia

PAGES: 65
BIG AREA: Ciências Agrárias
AREA: Recursos Florestais e Engenharia Florestal
SUBÁREA: Tecnologia e Utilização de Produtos Florestais
SPECIALTY: Propriedades Fisico-Mecânicas da Madeira
SUMMARY:

Using native species with potential for energy purposes in forest plantations is important for contributing to the sustainability of the Amazon region. Tachigali vulgaris has shown promise for the region. However, various silvicultural aspects and their relationship with wood quality and tree growth need to be investigated to use the species more efficiently. The aim of this study is to investigate the effects of fertilization, soil textures and cambial age on the wood quality and growth of T. vulgaris trees for energy purposes. The study area is located at the company Jari Celulose S.A., in the district of Monte Dourado, Almeirim (PA). In 2010, two experimental plantations of approximately 1.6 ha each were set up. The experiments were carried out on yellow latosols of different textures (sandy loam and clayey). The design was in randomized blocks, with 4 blocks, and two treatments were evaluated: one without fertilization and the other with fertilization (320 kg ha^-1 of P₂O₅ and 199 kg ha^-1 of K₂O). This dissertation is divided into three chapters. Chapter 1: The combined effects of diameter, height, fertilization, forking and soil texture on the variation in the apparent density of T. vulgaris wood were evaluated. Chapter 2: A population equation was generated to estimate the basic density of T. vulgaris wood from the apparent density (12% moisture content) and the basic density classification (low density and medium density) was carried out for T. vulgaris trees. Chapter 3: Characterization of growth rings and variation in chemical profiles in T. vulgaris trees. The results obtained in Chapter 1 showed that the average apparent density was 0.632 g cm^-3. It was found that the variation in density between trees represents 31% and between longitudinal sections 69% of the total variation. In addition, the relationship between stem diameter and the presence of forking has a positive and negative influence, respectively, on the species average apparent density. Soil types, presence or absence of fertilization and types of stems did not influence the apparent density of the wood, regardless of age and longitudinal position. The results of Chapter 2 show that the population equation was suitable for estimating basic density from the apparent density of T. vulgaris wood. Finally, Chapter 3 provided important information on the influence of the factors tested on 3 chemical elements: calcium (Ca), sulphur (S) and silicon (Si). Forked trees had a higher concentration of Ca, while trees in clay soil had a higher concentration of Si. For the element S, there was no influence from the factors tested. The results obtained in these three chapters show the species' potential for bioenergy production and will contribute to a broader interpretation of its potential for use in commercial plantations in the Amazon

COMMITTEE MEMBERS:
Externa à Instituição - ANA CAROLINA MAIOLI CAMPOS BARBOSA - UFLA
Externo à Instituição - FLÁVIO HENRIQUE SILVEIRA RABELO - UFLA
Externo à Instituição - PAULO RICARDO GHERARDI HEIN - UFLA
Presidente - 1134991 - THIAGO DE PAULA PROTASIO