Efeito da Qualidade do Sítio e do Desbaste na Produção de Pinus

David, Hassan Camil; Netto, Sylvio Péllico; Arce, Júlio Eduardo; Corte, Ana Paula Dalla; Filho, Ataídes Marinheski; Araújo, Emanuel José Gomes de

doi:10.1590/2179-8087.096414

Cited by 3 publications

(3 citation statements)

References 10 publications

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“…At all ages and productive capacity classes considered, it was possible to obtain lumber pieces, however, those of larger dimensions and added value were obtained predominantly in areas of greater productive capacity, which was already expected. These results corroborate the fact that the quality of the site affects productivity (FIGUEIREDO FILHO et al, 2014;DAVID et al, 2017) and consequently the quality of the logs to be sent to the sawmill.…”

Section: Discussionsupporting

confidence: 82%

Optimization and Economic Analysis of Multiproducts Obtained From Wood of Eucalyptus Stands Under Different Productive Capacity Classes and Rotation Ages

Viana

Castro²,

Souza³

et al. 2021

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The present study aimed to analyze the yield and economic viability of the destination, for lumber and energy, of the wood from non-thinned stands of the hybrid Eucalyptus urophylla x Eucalyptus grandis under different productive capacity class and whose production was projected by individual tree growth model to different ages. The simulation of the growth of individual trees was performed by applying the height and diameter growth, and mortality sub-models for three productive capacity classes: high, medium and low. The Kozak model was adjusted to study the stem taper and, in addition, used to optimize patterns for sawing logs and to produce lumber. The economic viability of the projects was evaluated by Net Present Value, Equivalent Periodic Benefit and risk analysis using the Monte Carlo method. It was observed that in areas with less productive capacity the volume of wood destined for energy was greater than 80% and, in areas with greater productive capacity the volume of lumber was greater than 26%. Economic indicators showed that the lumber production was viable at any of the studied rotation age. The risk analysis using the Monte Carlo method did not indicate the possibility of the project being unfeasible under the conditions analyzed. The quantity of different types of products obtained and the wood yield depends on the productive capacity class and age of the stand. The destination of the wood for multiproducts is the most viable option, regardless of the productive capacity class.

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Section: Discussionsupporting

confidence: 82%

Optimization and Economic Analysis of Multiproducts Obtained From Wood of Eucalyptus Stands Under Different Productive Capacity Classes and Rotation Ages

Viana

Castro²,

Souza³

et al. 2021

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“…It is important to highlight that despite thinnings stimulate the tree diameter to grow in faster rates, oftentimes thinnings should not be applied when a forest is managed aiming to maximize total timber volume, disregarding log diameters, such as addressed by David et al (2017a) and Elesbão and Schneider (2011). In addition, we point out that timber production is associated with soil nutrients, light and water available in medium-and high-quality sites (ACERBI JUNIOR et al, 2002), therefore, we must take into account that the behavior of regimes changes among sites of different qualities (GOMES; MAESTRI; SANQUETTA, 1997;SANQUETTA et al, 1998;DAVID et al, 2017b).…”

Section: Effect Of Density and Thinning Regimes On Timber Productionmentioning

confidence: 99%

“…The reason of that difficulty is because tree growth depends on several factors, including site index, plant density, species, and age of the forest, among others. These variables combined generate various possibilities to manage a forest, but one, and only one of them reaches the optimal production, since they present distinct growth rates and stocking just by changing the thinning regimes (SOALLEIRO; GONZALEZ;SCHRÖDER, 2000;PALAHÍ;PUKKALA, 2003;MIINA, 2013;DAVID et al, 2017b). Thinnings play an important role in the forests destined to production of high-value logs, as venner and sawlogs.…”

Section: Introductionmentioning

confidence: 99%

Intensive Management for Optimizing the Production of High-Value Logs of Pine Forests in Southern Brazil

David¹,

Netto²,

Arce³

et al. 2018

Ciênc. Florest.

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O elevado número de variáveis da produção florestal dificulta o manejador decidir pela melhor tomada de decisão. Foi simulado o crescimento e produção de Pinus taedaL. em sítios altamente produtivos, com objetivo de indicar regimes de desbaste e densidades de plantio que maximizam a produção de toras grossas (diâmetro da ponta fina >35 cm), bem como avaliá-los economicamente. O software OpTimber-LP para otimização de problemas florestais foi usado. As simulações envolveram quatro densidades de plantio (1.111; 1.600; 2.000; e 2.500 plantas/ha); três desbastes com diferentes pesos, frequências e idades de aplicação; e corte raso aos 25 anos. Essas combinações totalizaram em 2.916 regimes de manejo. VPLA foi calculado com variação de taxas de interesse e considerando custos de produção e retornos provenientes de desbastes e do corte raso. Os resultados indicaram maior produção de toras grossas em regimes com menores densidades de plantio. A intensidade de desbaste de 60% destacou-se por ter sido ideal para quase todos os desbastes, principalmente nas densidades de 2.000 e 2.500 plantas/ha. Essa intensidade também foi ideal para o primeiro desbaste, independente da densidade de plantas. A produção nos melhores regimes variou de 480 e 260 m³/ha, para as densidades de 1.111 e 2.500 plantas/ha, respectivamente. VPLA variou de ~1.300 a ~2.100 R$/ha. Como conclusão, regimes de manejo menos densos propiciaram maior produção de toras grossas, porém menor em volume total; como consequência, o VPLA foi maior para os regimes mais densos, uma vez que a receita obtida pela produção de toras de alto valor não compensou a receita de toras mais finas (que também são mais baratas). Regimes com alta densidade podem fracassar com um único primeiro desbaste errado, enquanto que regimes com menor densidade podem ter produção realmente prejudicada quando são sujeitos a consecutivos desbastes errados.

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Energy balance and CO2 emission in mechanized biomass harvesting in pine stands under thinning

Rodrigues

Lopes

Silva

et al. 2019

An. Acad. Bras. Ciênc.

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Efeito da Qualidade do Sítio e do Desbaste na Produção de Pinus

Cited by 3 publications

References 10 publications

Optimization and Economic Analysis of Multiproducts Obtained From Wood of Eucalyptus Stands Under Different Productive Capacity Classes and Rotation Ages

Optimization and Economic Analysis of Multiproducts Obtained From Wood of Eucalyptus Stands Under Different Productive Capacity Classes and Rotation Ages

Intensive Management for Optimizing the Production of High-Value Logs of Pine Forests in Southern Brazil

Energy balance and CO2 emission in mechanized biomass harvesting in pine stands under thinning

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