Banca de DEFESA: RAFAELY PANTOJA OLIVEIRA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : RAFAELY PANTOJA OLIVEIRA
DATE: 26/01/2021
TIME: 08:30
LOCAL: Video conferência
TITLE:

Comparative study of the anatomy and basic density of wood of the varieties of Schizolobium Parahyba var. Amazonicum (Huber ex Ducke) Barneby and Schizolobium Parahyba var. Parahyba (vell.) Blake in a plantation in the Amazon.

KEY WORDS:

Anatomical characterization. Schizolobium parahyba var. amazonicum. Schizolobium parahyba var. parahyba. 

 

PAGES: 44
BIG AREA: Ciências Agrárias
AREA: Recursos Florestais e Engenharia Florestal
SUBÁREA: Tecnologia e Utilização de Produtos Florestais
SPECIALTY: Anatomia e Identificação de Produtos Florestais
SUMMARY:

The varieties of Schizolobium parahyba present a wide distribution in Brazilian biomes. For this reason, it is possible that adaptations accumulated over time have caused variations that may interfere with the anatomical characteristics and basic density of the wood, making this variety more efficient for large-scale cultivation than the others. Information on the anatomical properties and basic density of Schizolobium parahyba wood are important because it allows identifying characteristics intrinsic to each variety. The objective of this study was to determine the differences and similarities in the anatomy and basic density of the wood of the two varieties of Schizolobium parahyba (paricá and guapuruvu) that can contribute to the knowledge at the species level. The material used in this study comes from the planting of paricá and guapuruvu propagules at the Agroecológica São Roque farm, located in Moju town, Pará state. To study the anatomy and basic density of Schizolobium parahyba varieties, five paricá trees and five guapuruvu trees, both aged 6 years, were harvested. Discs were removed at the base and DBH position of each tree, for longitudinal analysis of the stem. In the radial direction of the stem, wedges were removed from the disks to collect the specimens in three equidistant positions: close to the medulla, intermediate, and close to the bark. The results show that the variations in the dimensions of the anatomical elements of the paricá and guapuruvu wood were more consistent along the radial profile compared to the longitudinal. The length and thickness of the fiber wall were relevant to differentiate the varieties of Schizolobium parahyba, in which the values were higher for paricá. The other anatomical characteristics (length, diameter, and frequency of the vessels, width, height and frequency of the rays, and diameter of the lumen of the fibers) were similar for both varieties. The highest value of wood basic density was reported for paricá as opposed to guapuruvu. Thus, paricá differed from guapuruvu with the highest value of wood basic density, which is justified by the higher values of fiber length and the cell wall thickness of this variety.

 

 

 

 

 

 

BANKING MEMBERS:
Presidente - 1550131 - MARCELA GOMES DA SILVA
Interna - 2410727 - LINA BUFALINO
Externo ao Programa - 388509 - MANOEL SEBASTIAO PEREIRA DE CARVALHO
Externo ao Programa - 1551175 - RODRIGO SILVA DO VALE
Externa à Instituição - AMÉLIA GUIMARÃES CARVALHO - UFU