Efeitos econômicos de diferentes programas de desbaste em povoamentos de &lt;i&gt;Pinus elliottii&lt;/i&gt;.

Spathelf, Peter; Seling, Irene

doi:10.5902/19805098393

Cited by 2 publications

(2 citation statements)

References 2 publications

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“…Table 3 also shows the decrease in IRR with the increase in the rotation age. This behavior was also reported by Spathelf & Seling (2000). Because of this behavior, it is sensible to consider complementary methods of evaluation.…”

Section: Optimal and Alternative Regimesmentioning

confidence: 93%

Economic analysis and revenue optimization in management regimes of Pinus taeda

et al. 2017

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Economic analysis and revenue optimization in management regimes of Pinus taeda 1The objective of this work was to select, using operational research techniques, management regimes of Pinus taeda L. that maximize the revenue generated by the wood, considering different attractiveness rates. The OpTimber-LP ® software, which performs the simulations using SisPinus ® software, was used for forest optimization. The regimes consisted of different combinations of forest sites, planting densities, thinning regimes and clearcutting ages, totaling 17,760 regimes per site. Wood production was quantified and evaluated by assortment classes. Planting, thinning and harvesting costs were considered. The Annualized Net Present Value (ANPV) and the Internal Rate of Return (IRR) of each management regime were calculated. As a result, the density of 1,600 plants per ha optimized ANPV for most cases. Optimized regimes included no or only one thinning and provided ANPV of 2,753 and 158 BRL per ha and IRR of 22.9% and 2.9% for sites I and IV, respectively. It was concluded that the optimal number of thinning is reduced in lower quality sites, and the less productive the site, the later the optimal year for clear cutting. The attractiveness rate is a parameter that contributes to the selection of thinning regimes, because the larger the rate, the larger the number of thinning and the earlier they should be carried out.Keywords: operational research; annualized net present value; attractiveness rate; forest site; log assortment. Análise econômica e otimização da receita em regimes de manejo de Pinus taeda L. HassanEste trabalho teve por objetivo selecionar, por meio de técnicas da pesquisa operacional, regimes de manejo de Pinus taeda L. que maximizem a receita com a madeira produzida, considerando diferentes taxas de atratividade. Foi utilizado o software OpTimber-LP ® para a otimização florestal, o qual realiza as simulações por meio do software SisPinus ® . Os regimes foram compostos por diferentes combinações de sítios florestais, densidades de plantio, regimes de desbaste e idades para corte raso, totalizando 17.760 regimes por sítio. A produção de madeira foi quantificada e valorada mediante classes de sortimento. Custos de plantio, desbaste e colheita foram considerados. O Valor Presente Líquido Anualizado (VPLA) e a Taxa Interna de Retorno (TIR) de cada regime de manejo foram calculados. Como resultado, a densidade de 1.600 plantas por ha otimizou o VPLA para a maioria dos casos. Os regimes otimizados incluíram nenhum ou apenas um desbaste e forneceram VPLA de 2.753 e 158 reais por ha e TIR de 22,9% e 2,9%, para os sítios I e IV, respectivamente. Concluiu-se que o número ideal de desbastes é reduzido em sítios com qualidade inferior, e quanto menos produtivo for o sítio, mais tardio será o ano ideal para o corte raso. A taxa de atratividade é um parâmetro que contribui para a determinação de regimes de desbaste, pois quanto maior for essa taxa, maior deve ser o número de desbastes, bem como mais precoces devem ser suas aplica...

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Section: Optimal and Alternative Regimesmentioning

confidence: 93%

Economic analysis and revenue optimization in management regimes of Pinus taeda

et al. 2017

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“…The interest rate of 8% per year was considered, as well as the cost of harvesting and extraction at R$ 19.00 m -3 , and the price of wood, cut, and stack at R$ 60.00 m -3 . The land factor cost was considered by the method of interest on the value of the land, as, according to Silva et al (2008), it provides more consistent results with market values.…”

Section: Methodsmentioning

confidence: 99%

Feasibility of wood production according to productivity class and rotation criteria

Castro

Ataíde

Castro

et al. 2019

Pesq. agropec. bras.

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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.

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Efeitos econômicos de diferentes programas de desbaste em povoamentos de <i>Pinus elliottii</i>.

Cited by 2 publications

References 2 publications

Economic analysis and revenue optimization in management regimes of Pinus taeda

Economic analysis and revenue optimization in management regimes of Pinus taeda

Feasibility of wood production according to productivity class and rotation criteria

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