Banca de DEFESA: ANA CAROLINA DE CARVALHO

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : ANA CAROLINA DE CARVALHO
DATA : 14/11/2018
HORA: 07:00
LOCAL: Auditório do CVT - Escola Agrícola de Jundiaí
TÍTULO:

ENERGY POTENTIAL OF WOOD OF FOREST SPECIES IN AREA UNDER SUSTAINABLE MANAGEMENT, AFTER RAPID CUTTING, IN RIO GRANDE DO NORTE

PALAVRAS-CHAVES:

Exploration, Biomass, Wood quality, Production modeling

PÁGINAS: 50
GRANDE ÁREA: Ciências Agrárias
ÁREA: Recursos Florestais e Engenharia Florestal
SUBÁREA: Energia de Biomassa Florestal
RESUMO:

The State of Rio Grande do Norte has considerable dependence on wood from the Caatinga, used as an energy resource in the home and industrial sectors. Studies on the productive potential of wood in forest stands of native species, which in turn involve not only wood productivity but also the technological characteristics of wood, help to understand the dynamics and potential of these stands, especially the quantity of available energy in fields after exploration. The objective of this work is to evaluate wood production and wood quality for energy, in an area under sustainable forest management, in the State of Rio Grande do Norte (Brazil), after shallow cut, in addition to estimating age of rotation of the stand. The selected area is located 100 km away from the capital of the RN, at Fazenda Milha / Poço da Pedra, municipality of João Câmara / RN. It has a managed area equivalent to 1,132.78 ha of native Caatinga forest and is nowadays the area with the longest period under forest management registered in the State of the RN. From the total of 15 plots, four were selected with their respective cutting ages, namely: Field 1 (T1): 12.3 years; Field 8 (T8): 9.3 years; Field 12 (T12): 7.2 years and Field 6 (T6): 6.6 years of cutting. Ten rectangular plots (20 m x 20 m) were casually cast, making a total of 40 points for the development of the study. In these, the trees with diameter at the breast height (DBH) of at least 1,9 cm (CAP ≥ 6 cm) were identified and after the species identification the DBH and the total height of the trees were identified. After analyzing the inventory of the 40 plots distributed in the four plots, those species were selected, which, together, represented at least 70% of the stands. From each selected species, three sample trees were felled, and the samples were then sampled at chest height (1.30 m) for determination of the basic density and upper calorific value of the wood, in accordance with ABNT NBR 11941 (ABNT, 2003) and ABNT NBR 8633 (ABNT, 1984), respectively. In order to estimate the wood volume of each plot, the average shape factor calculated by the cubage of the selected trees was applied and then the average production per hectare was estimated. After the cut in each plot, the cutting age (rotation age) of the area under study was estimated. It was concluded that 24 tree species occurred in the four plots studied and that seven species in 13 different classes of CAP were more representative and that together reflect 90% of the index value of importance of the stand. It was possible to adjust growth and yield curves to estimate future production, using estimates of production at different points in time of the studied plots. It is recommended to cut the forest when it has 17.3 years of regeneration. The wood production stood out in block 1, the oldest with 12.3 years of cutting. The quality of the wood for energy as well as the amount of energy stored in the study area will be estimated after the analysis of the quality of the wood.

MEMBROS DA BANCA:
Presidente - 1880266 - ROSIMEIRE CAVALCANTE DOS SANTOS
Externo à Instituição - ANANIAS FRANCISCO DIAS JÚNIOR - UFES
Externo à Instituição - RENATO VINÍCIUS OLIVEIRA CASTRO - UFSJ