Jorge Antonio de Farias

Massa específica básica e massa seca de madeira de Eucalyptus grandis sob o efeito do espaçamento de plantio e da posição axial no tronco.

The basic density and dry mass of wood and bark of Eucalyptus grandis W Hill ex-Maiden of growing under twelve tree spacing were investigated. Thirty six trees (three per unit), with age of approximately ten years, coming from experimental units of AFUBRA, were used. Disks at base, DBH, 25, 50, 75 and 100% of trunk commercial height were taken from each tree for determination of wood and bark basic densities. Except for the smaller tree spacing, there was a decrease in basic density and dry mass of wood and bark with increasing planting spacing. The between lines tree spacing that produced the larger values of the studied variables were from 1,5 to 2 m.

DIAGNÓSTICO DAS FLORESTAS PLANTADAS NA BACIA HIDROGRÁFICA DO RIO PARDO - RS

The present study aims to make a diagnosis of the forests planted in the basin of ‘Pardo’ river (Rio Pardo), in RS state, by contemplating the characterization of properties, of forestations, and of the availability and consumption of wood in the region. The area of reach of the study is in the central region of Rio Grande do Sul state, which main economy is the tobacco crop, enclosing 13 cities that compose the performance area of the Management Committee of Rio Pardo Hydrographic Basin. The data collect were conducted during year 2008. In order to determine the size of the sample, it was made a sampling with its probability proportional to the size, where the criterion of the sample unity distribution took in consideration the numbers of trees per city and, inside the cities, the number of trees per class of property size. The sampling method utilized on the forest inventory was by Prodan, in addition to interviews taken with the producers. The region is characterized by small agricultural producers, and 61.4% of the firewood used in the cure of tobacco leaves is acquired from others, moreover, the majority of the forestation possess reduced spacing (2.26 m²/plant) and low survival indices, in order of the 34.4% after 7 years of the plantation. The wooden current supply is of 2,781.069 m³, what guarantees a supplying for only 3.5 years. The collected data allow to evidence that the resources necessary to invest in the self-sufficiency of firewood for the crop tobacco, are of R

Potential medicinal use of forest species of the Deciduous Seasonal Forest from Atlantic Forest Biome, South Brazil

12,250,000,00, that could be placed annually, during seven years, equivalent the rotation in simple coppice, resulting in an area of 80 ha/year/city.

Quociente do diâmetro pela área basal e zonas de competição em povoamento monoclonal de Eucalyptus saligna

The current paper focuses on potential medicinal use of forest species from Deciduous Seasonal Forest in central region of Rio Grande do Sul State, South Brazil. Floristic and phytosociological surveys were carried out in 2011 and 2012. Results were compared with the available information in scientific literature about popular knowledge and biological/pharmacological evidences. Each species was classified in use categories to diseases, symptoms our disorders based on the International Statistical Classification of Diseases and Related Health Problems (ICD). In 2011, we found a total of 31 species, 77,4% of them with medicinal use. In 2012, we found 33 species,72,7% of them with medicinal use. The species most frequently mentioned were Casearia sylvestris, Eugenia uniflora, Cabralea canjerana, Luehea divaricata, Parapiptadenia rigida and Vitex megapotamica. The main species with biological/pharmacological properties were C. sylvestris, E. uniflora, L. divaricata, V. megapotamica and Zanthoxylum rhoifolium. We concluded that there is a considerable potential for medicinal purposes to forest species from Deciduous Seasonal Forest in the study region. We recommend further studies mainly about the species Prunus myrtifolia, Zanthoxylum rhoifolium, Cabralea canjerana and Casearia sylvestris which presented references to antitumoral properties.

EVOLUÇÃO DOS PREÇOS E CUSTOS UNITÁRIOS DA FABRICAÇÃO DO COMPENSADO NO ESTADO DO PARANÁ, BRASIL

The present work was developed in order to study the relation among the diameter and the basal area, the competition zones, the relative density, and the self-tinning in Eucalyptus saligna Smith monoclonal stand, with 238 pair’s data basis of permanent sampling by full density stand distribution, observed from 3 to 18 years old. The results obtained allowed to conclude that Tang’s density model was very precise and efficient. The self-thinning begins when the population reaches an average diameter of 8 cm. The relative density was equal 34.46%, with line gradient of 1.5818 (b). The maximum current annual increment in diameter and between the relative densities was observed between the ages of 14 and 15 years when the relative densities were 12.5% and 25%, characterizing a free growth competition zone among the individuals of the population. The zone of increasing competition between the relative densities of 25 and 50% and the imminent mortality zone occurred between the relative densities of 50 and 100%. The density model allowed detecting five competition zones, in the development of the stands, defined by zones of: excessive space, free growth, increase of competition, complete stock and imminent mortality, in relation to the relative density of the population.

A AGRICULTURA FAMILIAR NO CENÁRIO DA PRODUÇÃO DE FLORESTAS ENERGÉTICAS

This paper analyzed the evolution of the components costs of the plywood production and the prices paid to the industry and also identified the influence of macroeconomic variables in this evolution. The survey was conducted based on costs and prices between 2005 and 2012. The Price Indexes were calculated with the average of the annual real data deflated for December 2012 and, to assess the relation between the data and the macroeconomic variables, Pearson’s correlation coefficient was used. The results indicated an increase of 0.08% in real costs of the ureic glue and a reduction of 2.7%, 4.7% 9.9% and 11.7% of the input costs: electricity, phenolic glue, sawn wood and diesel, respectively. Nevertheless, this decrease in the inputs costs was much lower than the 26% decrease in the price received by the plywood industry in the analyzed period. The veneer wood, however, followed the reduction in prices and had a fall of 25%; in contrast, the workforce had an increase of 63%. There was a sharper drop in the price of the final product than the unit costs of inputs. The analysis allows a compression of the contribution margin and a large influence of macroeconomic variables in the sale price and in the components of the production cost of manufacturing plywood.

Desempenho do Pinus echinata na Região Central do estado do Rio Grande do Sul, Brasil.

The aim of this study is to analyze the production of energetic forests of eucalyptus as an alternative economic in family farming region of Espumoso – RS, using resources from Harvest Plan 2012/2013. The methodology used for market research, survey implementation and maintenance cost and price was the application of open questions via phone, email and on-site for professionals, institutions and companies in the forest sector in the region. For the analysis of the economic viability of the energy market in the region has created a scenario of 1 hectare to produce wood for energy cut at 5 years of age, sale of forest standing, price and average increase of respectively R

Complementing firewood with alternative energy sources in Rio Pardo Watershed, Brazil

50.00m³ and 250m³/ ha/year. The average costs of deployment and maintenance are R

AVALIAÇÃO ECONÔMICA DE PROJETOS DE FLORESTAMENTO COM Eucalyptus grandis HILL EX MAIDEN IMPLANTADO SOB DIFERENTES ESPAÇAMENTOS

2,905.50 and economic evaluation of the scenario was calculated using the NPV, IRR and B/C. The scenario was considered viable, with positive NPV, IRR greater than the minimum rate of attractiveness and B/C greater than 1. With this study we can conclude that investment in deployment of eucalyptus plantations in the region of Espumoso is a great option to increase the financial return provided by rural activity.

ANÁLISE ECONÔMICA DE PLANTIOS FLORESTAIS NA AGRICULTURA FAMILIAR DA REGIÃO SUL DO BRASIL

In this work, the growth and the yield of a Pinus echinata Mill. stand were studied. The stand was implanted in 1996 in spacing of 3,0 x 2,0 meters, at Boqueirao do Leao, in Rio Grande do Sul, Brazil. For the study, 6 sample units were installed, and 6 trees of average diameter and dominant height were cut down for trunk analysis. Results indicated that the species presents a good growth in diameter, height and volume. At 12 years-old, the stand presented an average diameter of 18.4 cm, an average height of 12.6 m, a dominant height of 14.1 m, a basal area of 42.3 m 2 .ha -1 , total volume with rind of 248.2 m 3 .ha -1 and an average annual increment of 20.7 m 3 .ha -1 .yr -1 . These initial findings indicate that the species bears a great potential for growth, what enables it to thrive in some regions of Rio Grande do Sul.