Banca de QUALIFICAÇÃO: JOSIANA JUSSARA NAZARÉ BASÍLIO

Uma banca de QUALIFICAÇÃO de DOUTORADO foi cadastrada pelo programa.
DISCENTE: JOSIANA JUSSARA NAZARÉ BASÍLIO
DATA: 02/07/2024
HORA: 14:00
LOCAL: Google meet
TÍTULO:

Fine Root Density Dynamics and Carbon Stock of Eucalyptus spp.: Interplay of Age, Genotype, and Edaphoclimatic Conditions

PALAVRAS-CHAVES:

clone; soil water availability; fine root biomass; deep soil; carbon stock

PÁGINAS: 15
GRANDE ÁREA: Ciências Agrárias
ÁREA: Recursos Florestais e Engenharia Florestal
SUBÁREA: Silvicultura
RESUMO:

Roots play a fundamental role in forest ecosystems, but obtaining samples from deep layers remains a challenging process due to the methodological and financial efforts required. In our quest to understand the dynamics of Eucalyptus roots, we raise three fundamental questions. First, we inquire about the average extent of the roots of two contrasting Eucalyptus genotypes. Next, we explore the factors that directly influence the growth and depth of these roots, addressing elements such as soil type, climate, and water availability. Lastly, we investigate how the variation in Eucalyptus species may impact root growth patterns, biomass, and carbon stock. In this study, we observed that the maximum root depth increased by an average of 20% when genotypes were grown on sites with higher water availability (wet site). E. urophylla stands had a higher biomass and carbon stock (5.7 Mg Cha−1) of fine roots when cultivated on dry sites (annual rainfall~727 mm) than the wet sites (annual rainfall~1590 mm). In E. grandis × E. camaldulensis stands, no significant differences were observed in the stock of fine root biomass (3.2 Mg C ha−1) between the studied environments. Our results demonstrated that genotypes with greater drought tolerance (E. grandis × E. camaldulensis) tend to maintain higher stocks of fine root biomass (3.2–6.3 Mg ha−1) compared to those classified as plastic (E. urophylla), regardless of the edaphoclimatic conditions of the cultivation site. Finally, our research helps understand how Eucalyptus trees adapt to their environment, aiding sustainable forest managementandclimatechangemitigation. We also provide a practical tool to estimate underground biomass, assisting forest managers and policymakers in ensuring long-term forest sustainability.

MEMBROS DA BANCA:
Externo à Instituição - TÚLIO BARROSO QUEIROZ - UGA (Membro)
Interno - SORAYA ALVARENGA BOTELHO (Membro)
Presidente - LUCAS AMARAL DE MELO (Membro)
Externo à Instituição - LEANDRO SILVA DE OLIVEIRA - UFMG (Membro)
Interno - ISÁIRA LEITE E LOPES - UFLA (Suplente)
Interno - ADELSON LEMES DA SILVA JUNIOR - UFLA (Suplente)