Banca de DEFESA: KARLA MAYARA ALMADA GOMES

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : KARLA MAYARA ALMADA GOMES
DATA : 31/01/2019
HORA: 08:30
LOCAL: SALA I PPGCF/ ICA
TÍTULO:

DENDROMETRIC CHARACTERISTICS, SILVICULTURAL ASPECTS AND PLANT PRODUCTIVITY OF Hevea guianensis Aubl. IN THE NATIONAL FOREST OF TAPAJÓS, A CONSERVATION UNIT OF THE BRAZILIAN AMAZON

PALAVRAS-CHAVES:

Rubber tree, Forest management, Amazon.

PÁGINAS: 89
GRANDE ÁREA: Ciências Agrárias
ÁREA: Recursos Florestais e Engenharia Florestal
SUBÁREA: Manejo Florestal
ESPECIALIDADE: Dendrometria e Inventário Florestal
RESUMO:

In the Tapajós National Forest, a Conservation Unit located in the western part of the State of Pará, northern Brazil, there is a common practice among riparians that consists of the extraction of latex from native and planted rubber trees present in the backyards. However, there are two large planted rubber plantations called Terra Rica and Ponte where the population has aroused interest in producing natural rubber, but they are abandoned. Thus, the need arose to investigate the feasibility of the revitalization of the rubber trees in order to restructure the activity, making the extraction of the latex a working alternative to the traditional population. In this context, the objective of this work was to evaluate the silvicultural situation, the growth, the production and to carry out an economic analysis of the production of latex and natural rubber. In order to evaluate the silvicultural situation and the growth, two forest inventories were used in 100% of the rubber groves, carried out in 2013 and 2018, and a sampling to investigate the relationship of dendrometric, morphometric and competition indices with growth in diameter, where Pearson correlation analysis (r) was used to verify the existence of correlation. 2.965 rubber trees were inventoried in 2013 and 2,927 in 2018, with a density of 97.9 individuals.ha^-1 and 96.6 individuals.ha^-1, respectively. The t test detected a significant difference in total height and height of the bole of rubber trees between the inventories of 2013 and 2018, but in diameter, the rubber trees remained the same and, in general, in general, there were no problems of plant health in the plantations. The correlation between the dendrometric, morphometric and competition indices showed that growth in diameter has moderate and weak correlations with all variables, but it presents a significant correlation with the degree of slenderness and salience index. It was concluded that the dendrometric, silvicultural characteristics and growth in diameter of Hevea guianensis have been influenced by the absence of intervention in planting. To evaluate the production of latex and natural rubber, the production of rubber trees was analyzed by means of a sample of 105 young and adult trees, in all diametric classes, during the harvest season in the region. The average productivity per diameter class and the monthly production were evaluated. It was also investigated the existence of possible influences in the production: diameter at 1.30 m from the soil (DBH), bark thickness, crown form and sociological position. Through (r) the correlation of these variables with the production was calculated and the modeling of the latex and natural rubber production (Y) was calculated as a function of the variable of higher correlation (X). It was concluded that the trees with DBH ≥ 80 cm are the most productive and the production presented seasonal variation, being higher in the period of greatest rainfall in the year. As for the influences on the production of latex and natural rubber, these correlated positively and significantly with the DAP and the Rational and Sinusoidal models were the ones that best estimated the production, respectively. Finally, to evaluate the resumption of production, a survey of production costs and an economic evaluation was carried out. The results showed that it is feasible to resume production at the Terra Rica and Ponte with latex production being the most profitable, since it generates a higher profit in the commercialization. The resumption of latex production in the rubber plantations, in addition to profit, contributes to the generation of jobs and strengthens the non-timber forest products sector in the Tapajós National Forest.

MEMBROS DA BANCA:
Presidente - 1134991 - THIAGO DE PAULA PROTASIO
Interno - 142.060.489-91 - JOSE NATALINO MACEDO SILVA - Oxford
Externo ao Programa - 2366025 - GRACIALDA COSTA FERREIRA
Externo ao Programa - 388504 - ANTONIO CORDEIRO DE SANTANA
Externo à Instituição - ALVARO AUGUSTO VIEIRA SOARES - UFU