Quantification of forestry and carbonization waste

Castro, Ana Flávia Neves Mendes; Castro, Renato Vinícius Oliveira; Carneiro, Angélica de Cássia Oliveira; Carvalho, Ana Márcia Macêdo Ladeira; Silva, Cláudio Homero Ferreira da; Cândido, Welliton Lelis; Santos, Rosimeire Cavalcante dos

doi:10.1016/j.renene.2016.11.050

Cited by 19 publications

(11 citation statements)

References 3 publications

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“…Segundo dados apresentador por Castro et al (2017), a oferta de galhos, casca, folhas e ponteiras, em plantios da variedade de eucalipto, resultado do cruzamento genético de Eucalyptus urophylla x Eucalyptus grandis, com 6,6 anos de idade foi bem inferior ao observado para os povoamentos de Pinus sp., com um total de 12,74 kg.árv -1 e 17,03 t.ha -1 . Tais valores foram semelhantes ao ofertado após a terceira desrama dos plantios deste estudo.…”

Section: Resultsunclassified

“…Com base nas melhores correlações obtidas pela Tabela 3, foi feita a estimativa da oferta de biomassa, em massa, em função das variáveis dendrométricas, que foram o DAP e a altura total das árvores (Tabela 4), que são de fácil determinação no campo e têm sido tradicionalmente usadas em estudos de quantificação (LUPI et al, 2015). Castro et al (2017) enfatizam em seu trabalho sobre quantificação de biomassa na produção de carvão vegetal, sobre a falta de equações alométricas específicas para estimar a disponibilidade de biomassa em povoamentos com espécies e de regiões distintos e facilitar a tomada de decisão, o que ainda requer o uso de amostragens destrutivas. Fonte: Autor (2013) Em que: DAP = diâmetro a altura do peito (cm); *Correlação significativa ao nível de 5% de probabilidade de erro Tabela 4 -Estimativa da oferta dos componentes da biomassa de Pinus taeda com base nas variáveis dendrométricas dos povoamentos.…”

Section: Resultsunclassified

“…Os principais destinos da madeira em tora são para a produção de celulose, papel, madeira serrada, painéis de madeira reconstituída e geração de energia. Outras partes das árvores, como cascas, ramos, raízes, ponteiras, tocos, toretes e folhas são mantidos no campo após a colheita, considerados resíduos que são desperdiçados quanto ao aproveitamento da biomassa (BELLOTE et al, 1998;TOLOSANA et al, 2014;CASTRO et al, 2017).…”

Section: Introductionunclassified

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Estimativa da oferta de biomassa florestal em povoamentos de <i>Pinus taeda</i> L. após intervenções culturais

Ferreira

Stähelin²,

Jesus

et al. 2019

Ciênc. Florest.

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Com a determinação do quanto de biomassa florestal é gerada após as intervenções culturais é possível definir as áreas passíveis de exploração. Com isso, o objetivo do trabalho foi quantificar e estimar a oferta de biomassa de Pinus taeda L. disponível após as intervenções culturais. O experimento foi realizado em reflorestamentos nos municípios dos estados do Paraná e Santa Catarina, com idades de 3 anos (primeira desrama), 5 anos (segunda desrama), 7 anos (terceira desrama), 11 anos (primeiro desbaste) 19 anos (segundo desbaste), 23 e 33 anos (cortes rasos). Para cada idade foram amostradas 10 árvores e quantificados os componentes acículas, galhos, ponteira e casca. Após o corte raso, aos 23 anos houve maior disponibilidade de biomassa individual (372,6 kg.árv-1) e por unidade de área (144,4 t.ha-1), sendo composto principalmente por galhos (69,3%), seguido das acículas (17,9%), casca (11,0%) e ponteira (1,8%) por unidade de área. A correlação entre a massa dos componentes da biomassa por árvore e as variáveis independentes foi significativa e superior a 0,52. A menor correlação foi observada entre estas e a quantidade ofertada de ponteiras. Os modelos de regressão selecionados para estimar a massa de biomassa em função das variáveis independentes tiveram R²aju superiores a 83%, baixos desvios padrões e coeficientes de variação.

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Section: Resultsunclassified

Section: Introductionunclassified

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Estimativa da oferta de biomassa florestal em povoamentos de <i>Pinus taeda</i> L. após intervenções culturais

Ferreira

Stähelin²,

Jesus

et al. 2019

Ciênc. Florest.

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“…Since forestry products are one of the main renewable energy sources in Latvia, intensification of forest management is present and expected in the future. Besides the most valuable forestry product -timber, logging residues such as treetops, branches, bark and roots are a significant renewable energy source (Castro et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Development of young stands after different intensity regeneration fellings

Kļaviņš¹,

Kalvite²,

Lībieté³

2019

Research for Rural Development

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The share of the renewable resources used continues to grow due to environmental, economic and political reasons. Consequently, intensification of forest management is ongoing and expected to continue in the future. Logging residues, such as treetops, branches and stumps, are a significant renewable energy source. Since the logging residues are noticeably richer in nutrients than conventionally harvested stems, there is a concern related to the negative impact of intensified harvesting on the ecosystems, productivity of the sites and sustainability of forestry in general. To evaluate the impact, this study has compared different intensity harvesting effect on the next rotation young stand productivity in eight sites in Latvia. In a nutrient-rich site, the productivity of Norway spruce was higher in the whole-tree harvest (WTH) subplot comparing to stem-only harvesting (SOH) subplot three years after the planting. Productivity of Scots pine in oligotrophic conditions was observed to be higher in SOH subplot comparing to WTH subplot two and three years after planting. Furthermore, in a site on a mineral soil relatively richer in nutrients no significant differences were observed. Comparing WTH to whole tree harvest + stump biomass (SB) extraction subplots, the productivity of Norway spruce was higher in WTH four to five years after the planting; in a mixed stand of Norway spruce and black alder no productivity differences of spruce were detected, but productivity of black alder was higher in WTH+SB subplot five years after the planting; in black alder stands a significantly higher productivity was observed in WTH subplot four and five years after the planting.

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“…Timber is often considered as the most valuable resource in forestry, but logging residues consisting of branches, bark, stems and roots (lower value biomass) also make up significant energy source (Castro et al, 2017). Amid the recent decade in Nordic and Baltic countries stump harvesting has become more popular in forest management (Grelle et (Carter and McDonald, 1998).…”

Section: Introductionmentioning

confidence: 99%

Changes in Macronutrient Concentrations in Soil Solution Following Regeneration Felling in Pine and Spruce Stands: Whole-Tree Harvesting Versus Stem-Only Harvesting

Kļaviņš¹,

Bārdule²,

Lībieté³

2018

Proccedings of International Scientific Conference "RURAL DEVELOPMENT 2017"

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While conventional forest management in boreal and hemiboreal conditions has traditionally been targeted to use and enhance mainly provisioning services like timber production, the main goal of national and European forest policy is to ensure sustainable management of European forests in all aspects. Regeneration felling is a major disturbance in boreal and hemiboreal forests resulting in significant increase of organic matter on the forest floor in the form of logging residues (bark, small branches, tree tops) and severed roots (in case of stump harvesting), and can increase the risk of nutrient leaching. Recently, concern about the effect of forest management impact on macronutrient leaching potentially decreasing nutrient availability for the next forest generations and causing deterioration of water quality has been raised. In 2011, three objects to study the impact of different intensity regeneration felling (stem-only harvesting and whole-tree harvesting) were established in scientific research forests in Kalsnava forest district, eastern part of Latvia. Two sites were located on mineral soils (Myrtillosa and Hylocomiosa site type, dominant tree species Pinus sylvestris L.) and one on drained peat soil (Oxalidosa turf. mel. site type, dominant tree species Picea abies (L.) Karst.). Felling was performed in early spring 2013 with harvester, timber was extracted and logging residues were removed with forwarder, following "business as usual" principle. Soil solution samples were collected once or twice a month in 2012, 2013, 2014, 2015 and 2016. This study presents trends of pH and macronutrient (NO3 --N, PO43--P, K) concentrations during five years -one year before harvesting and four years following harvesting. In general, significant forest management impact expressed as increase of macronutrient concentrations in soil solution was detected in the second and third year after harvesting, but in the fourth year concentrations started to decrease again.

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Quantification of forestry and carbonization waste

Cited by 19 publications

References 3 publications

Estimativa da oferta de biomassa florestal em povoamentos de <i>Pinus taeda</i> L. após intervenções culturais

Estimativa da oferta de biomassa florestal em povoamentos de <i>Pinus taeda</i> L. após intervenções culturais

Development of young stands after different intensity regeneration fellings

Changes in Macronutrient Concentrations in Soil Solution Following Regeneration Felling in Pine and Spruce Stands: Whole-Tree Harvesting Versus Stem-Only Harvesting

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