VIABILIDADE DE PROJETOS FLORESTAIS EM TRÊS REGIMES DE MANEJO NA MESORREGIÃO CENTRO-ORIENTAL DO PARANÁ

FLORESTA ◽  
2013 ◽  
Vol 44 (1) ◽  
pp. 153 ◽  
Author(s):  
William Tomaz Folmann ◽  
Gabriel de Magalhães Miranda ◽  
Andrea Nogueira Dias ◽  
Fernando de Camargo Moro ◽  
Maria Laura Quevedo Fernandez
Keyword(s):  
Pinus Taeda ◽  
Net Present Value ◽  
Market Price ◽  
Economic Viability ◽  
Selling Price ◽  
Multiple Use ◽  
Oriental Region ◽  
Management Regime ◽  
Planning Department ◽  
Pinus Taeda L

O objetivo do presente trabalho foi analisar a viabilidade econômica de projetos florestais de Pinus taeda L. com base em dados de uma empresa florestal localizada no estado do Paraná. A análise de rentabilidade foi feita contemplando oito projetos, subdivididos em três diferentes regimes de manejo, localizados na mesorregião centro-oriental do Paraná. A viabilidade econômica foi avaliada por meio de Valor Presente Líquido (VPL), Taxa Interna de Retorno (TIR), Valor Periódico Equivalente (VPE) e Valor Esperado da Terra (VET), calculados com base no fluxo de caixa de cada projeto, utilizando-se a taxa de juros real de 6,75% ao ano. Os volumes utilizados foram obtidos de acordo com os sortimentos adotados para a espécie no Paraná, e os custos foram obtidos junto ao setor de planejamento da empresa. Os preços de venda da madeira em pé utilizados na análise foram oriundos do preço médio de mercado no estado, de acordo com o sortimento. O regime de manejo que apresentou melhores resultados foi o multiple use, com VPL de R$ 2.606,32; TIR de 10,2%; VPE de R$ 241,26 e VET de R$ 4.193,39.Palavras-chave: Rentabilidade; economia florestal; indicadores de viabilidade econômica. AbstractViability of forest projects in three management regime in the center-oriental region of Parana State. The objective of this research was to analyze the economic viability of the forest projects of Pinus taeda based on data from a forest enterprise located on the Parana State. The profit analyze was developed contemplating eight projects, subdivided in three different management regime, located in the Center-Oriental region of the Parana State. The economic viability was evaluated based on the Net Present Value (NPV), Internal Return Rate (IRR), Periodic Equivalent Value (PEV) and the Soil Expected Value (SEV), determined by cash flow, with a real interest rate of 6.75% per year. The volumes used were described based on assortment used for the species in Paraná, and the costs were from the planning department of the enterprise. The selling price of the stand-up wood used in the analyze was obtained by the average market price in the state, according to the assortment. The management regime that presented the best results was the multiple use, with NPV of R$2,606.32; IRR of 10.2%; PEV of R$241.26 and SEV of R$4,193.39.Keywords: Profit; forest economy; economic viability indicators.

scholarly journals Economic analysis and revenue optimization in management regimes of Pinus taeda

Revista CERES ◽  
2017 ◽  
Vol 64 (3) ◽  
pp. 222-231
Author(s):  
Hassan Camil David ◽  
Julio Eduardo Arce ◽  
Edilson Batista de Oliveira ◽  
Sylvio Péllico Netto ◽  
Rodrigo Otávio Veiga de Miranda ◽  
...  
Keyword(s):  
Pinus Taeda ◽  
Net Present Value ◽  
Optimal Number ◽  
Revenue Optimization ◽  
Management Regime ◽  
Forest Sites ◽  
Management Regimes ◽  
Pinus Taeda L ◽  
Harvesting Costs ◽  
Selection Of

ABSTRACT The 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 clearcutting. 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.

scholarly journals The Financially Optimal Loblolly Pine Planting Density and Management Regime for Nonindustrial Private Forestland in East Texas

2005 ◽  
Vol 29 (1) ◽  
pp. 16-21 ◽  
Author(s):  
Ching-Hsun Huang ◽  
Gary D. Kronrad ◽  
Jason D. Morton
Keyword(s):  
Pinus Taeda ◽  
Loblolly Pine ◽  
Optimal Number ◽  
Planting Density ◽  
East Texas ◽  
Rates Of Return ◽  
Management Regime ◽  
Pinus Taeda L ◽  
Economic Analyses ◽  
Private Forestland

Abstract Economic analyses were conducted to investigate the effects of initial planting density on the profitability of loblolly pine (Pinus taeda L.) on nonindustrial private forestland (NIPF) in East Texas. Five planting densities of 870, 725, 620, 540, and 484 trees per acre (tpa)representing spacings of 5×10, 6×10, 7×10, 8×10, and 9×10 ft, respectively, were investigated. Land expectation values were used to determine the financially optimal thinning and final harvesting schedules (including rotation length and the timing, frequency, and intensity of thinning). Five site indices (50–90), six real alternative rates of return (ARR) (2.5–15.0%), and three thinning options (0, 1, and 2) were employed. Results indicate that two thinnings appear to be the financially optimal number of thinnings for most siteindex-ARR scenarios. The planting spacing of 8×10 ft is optimal when ARR is low, and the 9×10 ft spacing is optimal when ARR is high. South. J. Appl. For. South. J. Appl. For. 29(1):16–21.

scholarly journals ANÁLISE COMPARATIVA DA VIABILIDADE ECONÔMICA DE PLANTIOS DE Pinus taeda E Eucalyptus dunnii NA REGIÃO CENTRO-SUL DO PARANÁ

FLORESTA ◽  
2010 ◽  
Vol 40 (3) ◽  
Author(s):  
Vinicius Vitale ◽  
Gabriel De Magalhães Miranda
Keyword(s):  
Economic Evaluation ◽  
Comparative Analysis ◽  
Pinus Taeda ◽  
Net Present Value ◽  
Evaluation Criteria ◽  
Economic Viability ◽  
Cost Rate ◽  
Eucalyptus Dunnii ◽  
The Interest Rate ◽  
Benefit Cost

O presente trabalho teve por objetivo fazer uma análise comparativa de viabilidade econômica de projetos florestais com Pinus taeda e Eucalyptus dunnii localizados no município de Prudentópolis, PR. Na análise econômica foram utilizados os critérios do Valor Presente Líquido (VPL), Razão Benefício Custo (B/C), Taxa Interna de Retorno (TIR) e Valor Periódico Equivalente (VPE). A taxa de juros usada foi de 6,75% ao ano. Para o projeto de Pinus taeda os dados de custos e receitas corrigidos totalizaram R$ 4.344,71/ha e R$36.143,99/ha, respectivamente. Os valores calculados dos critérios de avaliação econômica foram um VPL de R$31.799,28/ha; Razão Beneficio/Custo de 8,32, TIR de 27.23% e VPE de R$ 3.200,87/ha/ano. Para o povoamento de Eucalyptus dunnii, a correção dos valores para o momento zero totalizaram R$ 5.767,75/ha, de custos e R$43.842,46/ha de receitas. Os valores calculados dos critérios de avaliação econômica foram um VPL de R$ 38.074,71/ha; Razão Beneficio/Custo de 7,60; TIR de 35,83% e um VPE de R$ 3.832,55/ha/ano. Para os dois projetos foi realizada análise de sensibilidade do VPL. Os resultados mostraram que ambos os projetos são economicamente viáveis.Palavras-chave: Análise comparativa; viabilidade econômica; custos; receitas. AbstractComparative analysis of the economic viability of Pinus taeda and Eucalyptus dunnii plantations in the south-center region of Parana State, Brazil. The objective of this research was to carry out a comparative analysis of economic viability of afforestation projects with Pinus taeda and Eucalyptus dunnii located in Prudentópolis County, State of Paraná, Brazil. In the economic analysis the criteria of Net Present Value (NPV), Benefit Cost rate (B/C), Internal Return Rate (IRR) and Periodic Equivalent Value (PEV) were used. The interest rate used was of 6.75% per the year. For the Pinus taeda plantations the data of rectified costs and income totalized R$ 4.344,71/ha and R$ 36.143,99/ha, respectively. The calculated values of the of economic evaluation criteria presented a NPV of R$ 31,799.28/ha, a Benefit Cost rate of 8,32, an IRR of 27.23% and a PEV of R$ 3.200,87/ha. For the Eucalyptus dunnii plantations the rectified values totalized R$5.767,75 and R$43.842,46/ha for the costs and income, respectively. The calculated values of the economic evaluation criteria showed a NPV of R$38.074,71/ha, a Benefit Cost rate of 7.60, an IRR of 35,83%, and a PEV of R$3.832,55/ha. A sensitivity analysis of the NPV for the two plantations was carried out. The results showed that both afforestation projects are economically viable.Keywords: Comparative analysis; economic viability; costs; income.

scholarly journals Quantitative Policy Analysis for Sustainable Aviation Fuel Production Technologies

2021 ◽  
Vol 9 ◽  
Author(s):  
Z. Juju Wang ◽  
Mark D. Staples ◽  
Wallace E. Tyner ◽  
Xin Zhao ◽  
Robert Malina ◽  
...  
Keyword(s):  
Net Present Value ◽  
Fats And Oils ◽  
Aviation Fuel ◽  
Economic Viability ◽  
Selling Price ◽  
Cumulative Impact ◽  
Middle Distillate Fuel ◽  
Production Technologies ◽  
Analysis Models ◽  
The Impact

This paper quantifies the impact of different policy options on the economic viability of sustainable aviation fuel (SAF) production technologies. The pathways considered include isobutanol to jet from corn grain, hydroprocessed esters and fatty acids (HEFA) from inedible fats and oils, HEFA from palm fatty acid distillate, synthesized iso-paraffins from sugarcane, Fischer-Tropsch (FT) gasification and synthesis from municipal solid waste, and micro FT from wood residues. The policies considered include feedstock subsidies, capital grants, output based incentives, and two policies intended to reduce project risk. Stochastic techno-economic analysis models are used to quantify the policies’ impact on project net present value and minimum selling price of the middle distillate fuel products. None of the technology pathways studied are found to be financially viable without policy aid. The median total policy costs required for economic viability range from 35 to 337 million USD per production facility, or 0.07–0.71 USD/liter. Our results indicate that the cumulative impact of multiple policies, similar in magnitude to analogous real-world fuel policies, could result in economically viable SAF production.

scholarly journals A Consensus Map for Loblolly Pine (Pinus taeda L.). I. Construction and Integration of Individual Linkage Maps From Two Outbred Three-Generation Pedigrees

Genetics ◽  
1999 ◽  
Vol 151 (1) ◽  
pp. 321-330 ◽  
Author(s):  
Mitchell M Sewell ◽  
Bradley K Sherman ◽  
David B Neale
Keyword(s):  
Pinus Taeda ◽  
Loblolly Pine ◽  
Fragment Length Polymorphism ◽  
Random Amplified Polymorphic Dna ◽  
Mapping Function ◽  
Genetic Maps ◽  
Linkage Data ◽  
Linkage Maps ◽  
Consensus Map ◽  
Pinus Taeda L

Abstract A consensus map for loblolly pine (Pinus taeda L.) was constructed from the integration of linkage data from two unrelated three-generation outbred pedigrees. The progeny segregation data from restriction fragment length polymorphism, random amplified polymorphic DNA, and isozyme genetic markers from each pedigree were recoded to reflect the two independent populations of parental meioses, and genetic maps were constructed to represent each parent. The rate of meiotic recombination was significantly greater for males than females, as was the average estimate of genome length for males {1983.7 cM [Kosambi mapping function (K)]} and females [1339.5 cM(K)]. The integration of individual maps allows for the synthesis of genetic information from independent sources onto a single consensus map and facilitates the consolidation of linkage groups to represent the chromosomes (n = 12) of loblolly pine. The resulting consensus map consists of 357 unique molecular markers and covers ∼1300 cM(K).

scholarly journals Method for Sizing of a PV System for Family Home Using Economic Indicators

Energies ◽  
2021 ◽  
Vol 14 (15) ◽  
pp. 4529
Author(s):  
Zvonimir Šimić ◽  
Danijel Topić ◽  
Ilija Crnogorac ◽  
Goran Knežević
Keyword(s):  
Input Data ◽  
Net Present Value ◽  
Market Price ◽  
System Size ◽  
Electricity Price ◽  
Economic Indicators ◽  
Solar Irradiation ◽  
Pv System ◽  
Output Data ◽  
Levelized Cost Of Electricity

This paper presents a method for finding an optimal photovoltaic (PV) system according to Croatian legislation. The PV sizing model, in which a decision on investment is made according to economic indicators, is made using MATLAB Software. Based on the input data, the monthly PV system production is calculated, and electricity price formed. According to the PV system production and electricity price, economic indicators are calculated and obtained as output data. The model input data are solar irradiation, load diagram, PV system costs and market price of electricity while the model output data are PV system production, savings, profit, incomes, Net Present Value (NPV) and Levelized Cost of Electricity (LCOE). The obtained economic indicators are presented graphically and used for decision making on an optimal PV system size. The presented model is applied and presented in a case study.

Long-term effects of stand density management and genotype on wood properties of loblolly pine (Pinus taeda L.) in the mid-South USA

2021 ◽  
Vol 491 ◽  
pp. 119176
Author(s):  
Michael A. Blazier ◽  
Thomas Hennessey ◽  
Laurence Schimleck ◽  
Scott Abbey ◽  
Ryan Holbrook ◽  
...  
Keyword(s):  
Pinus Taeda ◽  
Loblolly Pine ◽  
Stand Density ◽  
Wood Properties ◽  
Long Term Effects ◽  
Stand Density Management ◽  
Pinus Taeda L

scholarly journals Comparative Dynamics of Above-Ground Litter Production and Decomposition from Eucalyptus Grandis Hill ex Maiden and Pinus Taeda L., and Their Contribution to Soil Organic Carbon

Forests ◽  
2021 ◽  
Vol 12 (3) ◽  
pp. 349
Author(s):  
Andrés Baietto ◽  
Jorge Hernández ◽  
Amabelia del Pino
Keyword(s):  
Pinus Taeda ◽  
Decomposition Rate ◽  
Methodological Approach ◽  
Eucalyptus Grandis ◽  
Isotopic Analysis ◽  
Forest Litter ◽  
First Year ◽  
Litter Production ◽  
Forest Species ◽  
Pinus Taeda L

The replacement of native pasture by exotic commercial forest species is an infrequent situation worldwide. In these systems, a new component is introduced, forest litter, which constitutes one of the main ways of incorporating carbon into the soil–plant system. The present work seeks to establish a methodological approach to study the dynamics of litter production and decomposition in an integrated way. The general objective was to characterize and compare the litter production dynamics in 14-year-old Eucalyptus grandis Hill ex Maiden and Pinus taeda L. commercial plantations. During two years, seasonal evaluations of fall, decomposition and accumulation of litter were carried out in stands of both species. In turn, the contribution of carbon from forest species to the soil through isotopic analysis techniques was quantified. Litterfall in E. grandis showed maximums during the spring of the first year and in the spring and summer of the second. In P. taeda, the maximums occurred in summer of the first year and in autumn of the second. In relation to the decomposition rate, the results based on short periods of evaluation between 15 and 21 months did not show differences between species, nor for the different moments of beginning of the evaluation, obtaining average values of 0.0369 month−1 for E. grandis and 0.0357 month−1 for P. taeda. In turn, both the decomposition rate of the material as a whole and the estimates of accumulated biomass in equilibrium state did not show significant differences between the species. Additionally, there was a relevant incorporation of carbon into the soil by forest species, fundamentally in the first few centimeters, substituting an important proportion of the carbon inherited by the original cover of native pastures. Finally, it is necessary to specify that the scope of the findings obtained is greatly limited by the sample size used in this study.

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