Viabilidade econômica do componente arbóreo de sistema agrossilvipastoril comparado ao de plantio florestal na pequena propriedade rural

Ataíde

et al. 2019

Pesq. agropec. bras.

The objective of this work was to evaluate the effect of forest rotation on the technical and economic feasibility of eucalyptus wood production for charcoal, in different productivity classes. Data came from Eucalyptus stands whose area was stratified into three classes of productivity: high, medium, and low. To each class, a different criterion of forest rotation was applied, as follows: age of maximum productivity, economic rotation age, single harvest age, and no technical parameter. Analyses of economic feasibility and production were performed for a 21-year planning horizon. For rotation without a technical parameter, a simulation by the Monte Carlo method was performed. For all rotation criteria, feasibility was observed for high- and medium-productivity classes, and unfeasibility for the low-productivity class. For rotation without a technical parameter, there is no chance for the project to be unfeasible. Wood production viability for charcoal under the studied conditions depends on the productivity class, for any rotation criterion adopted. Rotation criterion influences profitability, whose definition, according to productivity class, contributes to forest production maximization and to the economic return of the project, under the studied conditions.

Section: Resultsmentioning

confidence: 99%

Feasibility of wood production according to productivity class and rotation criteria

Ataíde

et al. 2019

Pesq. agropec. bras.

“…Studies have found that consortium systems are fi nancially viable (Oliveira et al, 2008, Weimann, Farias, Deponti, 2017. In comparing the fi nancial feasiblity between an agrosilvopastoral system and conventional planting in a small rural property at a rate of 7.5% per year for a 15-year rotation, it was verifi ed that the agrosilvopastoral system was viable with an NPV of 10,848.88 R $/ha and IRR of 24.83% per year and BCR of 6.80 at a density of 500 trees per hectare (Weimann, Farias, Deponti, 2017).…”

Section: Discussionmentioning

confidence: 99%

Production and Financial Feasibility in Silvopastoral System in Small Rural Property

et al. 2022

Self Cite

The implementation of silvopastoral systems (SPS) on properties that have family farming is an alternative to diversify land use, to acquire more than one production good, and diversify income generation. Therefore, the objective of this study was to evaluate the financial viability and quantify the volume of the forest component in an SPS with a spacing of 3.0 m x 20.0 m for multiple uses, carried out at 4 years of age for a 16-year rotation. For the analysis of financial viability, we used project analysis criteria such as: net present value (NPV), internal rate of return (IRR), and benefit-cost ratio (BCR) for a 16-year horizon with rate benchmarks interest rate of 3%, 4.5% and 10%. Based on the financial analysis criteria, the tree component of the system is viable, as it presented an NPV greater than zero, IRR exceeding the minimum attractiveness rate and BCR greater than 1 for all rates analyzed. The estimated production of the forest component was 257.28 m3/ha in 16 years. Thus, it can be concluded that the forest component in the arrangement of 3.0 m x 20.0 m at 16 years of age, provides a financial return for the small rural property. Therefore, it is a system that brings several economic and environmental advantages, optimizing the use of land, diversifying the production of the small property, generating income, bringing benefits to the reduction of methane gas (CH4) emissions, and assists in carbon sequestration (CO2).

“…O princípio econômico de um SAF está baseado na produção de diferentes produtos ao longo do ano em uma mesma área (Rocha, 2018). Weimann et al (2017) afirmam que as associações de cultivos como os SAFs são capazes de proporcionar uma rápida recuperação do capital investido, a partir da renda imediata durante os primeiros anos pelas culturas de ciclos curto, e uma renda em longo prazo com a venda de diversos produtos, como a produção de frutas e madeira.…”

Section: Discussionunclassified

Analise multitemporal do desmatamento no município de Tomé-Açú entre 1985 a 2018

et al. 2022

O objetivo desta pesquisa foi quantificar o desmatamento, considerando as mudanças espaciais e temporais da perda de floresta para o período de 1985 a 2018. Utilizou-se imagens do sensor Landsat para o mesmo período, referentes às órbitas/pontos 223/62 e 223/61. Foram realizadas composições coloridas RGB, realce linear de contraste das imagens e segmentação. Em seguida, realizou-se a interpretação das imagens por discriminação de classes. Os polígonos foram categorizados em 6 faixas de tamanho de áreas desmatadas. Adicionalmente, realizou-se a edição dos resultados do mapeamento e a elaboração de cartas temáticas. A expansão do desmatamento entre 1985 e 2018 acarretou perda de aproximadamente 298 mil ha de floresta (57% da área do município). Em todos os anos, foram observados valores elevados de polígonos no intervalo ≤ 6,25 ha e reduzido valor no intervalo > 50 ha. Os pequenos fragmentos (≤ 6,25 ha) respondiam por 15% de todo o desmatamento, enquanto os grandes (> 50 ha) respondiam por 45%. Ao longo do período analisado, foram observadas diferenças tanto na análise temporal, quanto nos padrões de distribuição do desmatamento, indicando forte potencialidade futura à perda de floresta.