Banca de QUALIFICAÇÃO: LIZANDRA ELIZEARIO DOS SANTOS

Uma banca de QUALIFICAÇÃO de DOUTORADO foi cadastrada pelo programa.
STUDENT : LIZANDRA ELIZEARIO DOS SANTOS
DATE: 16/11/2023
TIME: 14:00
LOCAL: UFOPA/NTB
TITLE:

INDICATORS IN THE TREE COMPONENT AS A STRATEGY TO ENHANCE CARBON SUPPLY IN AN INTEGRATED CROP-LIVESTOCK-FORESTRY SYSTEM IN WESTERN PARÁ

KEY WORDS:

silviculture, carbon stock, agroforestry systems, low carbon livestock

PAGES: 82
BIG AREA: Ciências Agrárias
AREA: Recursos Florestais e Engenharia Florestal
SUBÁREA: Silvicultura
SPECIALTY: Florestamento e Reflorestamento
SUMMARY:

The integrated crop-livestock-forestry system (ICLF) reduces greenhouse gas (GHG) emissions, improves soil quality, increases productivity and animal welfare and provides important environmental services. In this way, integrated production systems point to sustainability indicators in climate change scenarios. The objective of this work was to evaluate indicators in the above-ground tree component, as a strategy to enhance carbon supply in an integrated crop-livestock-forestry system in western Pará. The morphometric characteristics, wood density, carbon content, and tree biomass quantification were evaluated to estimate the carbon storage potential in the ICLF system. The study area was the Technological Reference Unit (TRU), located on the Nossa Senhora de Aparecida farm, in Mojuí dos Campos-PA, with 12 years of implementation, containing the following forest species: Amazon nut (Bertholletia excelsa Humn. & Bonpl.), cumaru (Dypterix odorata (Aublet.), Willd.) and African mahogany (Khaya grandifoliola A chev.). In each silvicultural plot, the species were planted in eight rows spaced 7 m x 5 m, with 33 plants on average, interspersed in plots 166 m apart, which are maintained with forage in full sun. The morphometric characterization was carried out, based on a 100% inventory, which took place in 2022, evaluating the following indices: crown diameter (CD), crown length (CL), crown projection area (CA), crown percentage (CP), crown formal area (CFA), degree of slenderness (DS), coverage index (CI) and protrusion index (PI). To obtain wood density (ρ), individuals with phenotypic characteristics that were not favorable to the system were selected and, thinned, collecting samples along the commercial stem, in positions (base – 0%, 25%, 50% and top – 100%). The physical test followed the methodology recommended in ABNT NBR7190 and NBR 11941. The carbon content was determined by thinning 10 trees of each species, in different diameter classes, separating the following components: leaves, thin branches and bole, totaling 30 samples for each species, on which elemental analysis was carried out. Biomass and carbon quantification are in the data analysis phase. The results showed that the species with the highest total and commercial height and diameter at 1.30 m of soil (DBH) was K. grandifoliola, with averages of 27.17 m, 9.26 m and 32.98 cm, respectively. B. excelsa stood out for having the largest average crown diameter of 24.04 m. As for K. grandifoliola, the development and length indicator is noticeable by the height in the canopy, confirmed by the average crown length (CL) of 17.91 m. The B. excelsa stands out for its canopy coverage, with an average crown projection area (CA) of 462.13 m² and crown formal area (CFA) of 1.94 m, and D. odorata had a higher percentage of canopy (CP), with 75.49%. The morphometric indices associated with crown diameter were more significant in D. odorata, with a coverage index (CI) of 1.26 and a protrusion index (PI) of 90.27. The relationship between total height and diameter of the tree indicated the highest degree of slenderness (DS) for K. grandifoliola with an average of 84.11. Regarding densities (apparent ρ, anhydrous ρ and basic ρ, in g.cm^-3) there was a difference between the species, being described in the following order: D. odorata (0.99, 0.91 and 0.83), B. excelsa (0.68, 0.61 and 0.55) and K. grandifoliola (0.61, 0.56 and 0.51), respectively. The most significant basic ρ was in D. odorata at 50%, 75% and 25% and the lowest values in K. grandifoliola were at 25%, 100% and at the base, as well as in B. excelsa were at 50% and 75 %. The highest carbon content is in the leaves of D. odorata (52.14%) and B. excelsa (50.68%). K. grandifoliola stores the highest carbon content in the stem (49.01%). In conclusion, indicators in canopy height, canopy projection, density dynamics along the commercial bole enhance strategic carbon capture actions in integrated systems in the Eastern Amazon that can be promoted by the payment for environmental services policy.

COMMITTEE MEMBERS:
Interna - ***.720.282-** - LUCIETA GUERREIRO MARTORANO - EMBRAPA
Interno - 1776327 - THIAGO ALMEIDA VIEIRA
Externo à Instituição - CARLOS TADEU DOS SANTOS DIAS
Externo à Instituição - ARYSTIDES RESENDE SILVA
Externo à Instituição - EMANUEL JOSÉ GOMES DE ARAÚJO - UFRRJ