Produção e distribuição de biomassa em Eucalyptus camaldulensis Dehn. em resposta à adubação e ao espaçamento

Neto, Sílvio Nolasco de Oliveira; Reis, Geraldo Gonçalves dos; Reis, Múcio Silva; Neves, Júlio César Lima

doi:10.1590/s0100-67622003000100003

Cited by 33 publications

(30 citation statements)

References 3 publications

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“…According to Oliveira Neto et al (2003), there is a bigger production of BIO per unit of area in the minor spacings, mainly due to the larger number of individuals. This justifies the decreasing trends in BIO production in the different compartments of the plants, due to the increase of planting spacing.…”

Section: Discussionmentioning

confidence: 99%

EFFECT OF PLANTING AGE AND SPACING ON ENERGY PROPERTIES OF Eucalyptus grandis W. Hill EX Maiden

et al. 2016

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-This study aimed to determine the effect of planting age and spacing on energy properties of different compartments of the biomass of Eucalyptus grandis W. EFEITO DA IDADE E DO ESPAÇAMENTO DE PLANTIO NAS PROPRIEDADES ENERGÉTICAS DO Eucalyptus grandis W. Hill ex MaidenRESUMO -Esse trabalho teve como objetivo determinar o efeito da idade e do espaçamento de plantio nas propriedades energéticas de diferentes compartimentos da biomassa de Eucalyptus grandis W. Hill ex Maiden, distribuída em diferentes espaçamentos: 2,0x1,0 m, 2,0x1,5 m, 3,0x1,0 m e 3,0x1,5 m, no 1º, 3º e 5º ano após o plantio. O presente trabalho foi realizado em um experimento instalado em delineamento experimental de blocos completos casualizados em três repetições. Foram determinadas as variáveis biomassa (BIO), poder calorífico superior (PCS), massa específica básica (ME), produtividade energética (PE), densidade energética (DE), teor de carbono fixo (CF), teor de material volátil (MV) e teor de cinzas (CZ). As idades proporcionam um efeito em todas as variáveis analisadas, sendo que no 5º ano após o plantio, são verificados os maiores valores de BIO, PE, ME, DE e CF. Os espaçamentos de plantio induzem a diferentes produções de BIO e PE, com uma tendência de redução dos valores com o aumento do espaçamento de plantio, em todos os períodos avaliados. Os compartimentos das árvores influenciam nas variáveis BIO, PCS, PE, CF, MV e CZ. Do ponto de vista energético, quanto maior a idade e menor o espaçamento de plantio, melhores são as propriedades energéticas da biomassa.Palavras-chave: Biomassa; Poder calorífico superior, Produtividade energética.

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Section: Discussionmentioning

confidence: 99%

EFFECT OF PLANTING AGE AND SPACING ON ENERGY PROPERTIES OF Eucalyptus grandis W. Hill EX Maiden

et al. 2016

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“…We found that volume of wood per hectare was greater in clone MA2001 compared with the other clones, due to the lower plant mortality. BOTELHO (1998) andOLIVEIRA NETO et al (2003) showed a higher production of wood per unit area at greater planting densities because of the larger number of individuals, and similarly, FERREIRA et al (2012) noted the positive influence of planting density on wood yield, as they reported higher productivity for more densely packed trees (14x2) than less dense plantings (22x2).…”

Section: Resultsmentioning

confidence: 91%

“…According to OLIVEIRA NETO et al (2003), planting arrangement should reflect the intended use of the end product, since low density tends to increase the production of dry matter of the aerial parts and wood per tree, because of greater CAP. For higher density plantings, there is greater biomass production per unit area, due to the greater number of individuals, however, the diameter of the wood tends to be smaller, thus leading to another market.…”

Section: Resultsmentioning

confidence: 99%

Consortium of eucalyptus with forage sorghum in semiarid of Minas Gerais State

et al. 2017

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The objective was to estimate the wood yield and essential oil content in three clones of eucalyptus that were planted in four contrasting arrangements and intercropped with sorghum. Eucalyptus clones MA2001 (Eucalyptus camaldulensis x E. tereticornis), A144 (Eucalyptus urophylla x E. grandis), and GG100 (Eucalyptus urophylla x E. grandis), were planted in single rows (10x2m), double rows (2x3+15m and 2x3+20m); and, triple rows (2x3x2+10m) in a randomized, complete block design experiment with four replicates. Our results demonstrated that planting spacing did not influence the essential oil yield or diameter at breast height in the clones. However, higher density plantings were shown to result in higher fresh weight of branches and leaves per plant. MA2001 grew taller, produced higher quantity of fresh biomass of branches and leaves per plant and volume of wood per hectare, and yielded more essential oil yield than the other clones. We concluded that MA2001 is the most suitable of the clones tested here for cultivation in water deficit conditions.

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“…The production of shoot dry biomass per tree, especially of stem biomass, was higher with larger spacing due to higher growth in diameter, whereas the biomass production per unit area was higher with smaller spacing due to the higher number of individuals (OLIVEIRA NETO, 2003).…”

Section: Resultsmentioning

confidence: 93%

Energy Estimate and Carbon Stock in Short-Rotation Eucalyptus Stands

Magnago

Arantes

Vidaurre

et al. 2016

CERNE

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The use of biomass as an alternative energy source has been gaining attention because of its energy characteristics and environmental contribution and because it is renewable in short production periods. The aim of the present study was to evaluate the biomass production and carbon sequestration of eucalyptus grown under different conditions. The basic density of the wood, stem volume with and without bark and dry biomass, accumulated carbon, assimilated carbon dioxide and estimated energy for each shoot component were determined for two hybrid clones of E. grandis x E. urophylla at 6 and 12 months of age, grown at different spacing in two different areas, one with and one without irrigation. The highest dry biomass and carbon accumulation values were observed for plants grown at smaller spacing and with irrigation. A significant effect of irrigation on the variables quantified was only observed for 12-month-old plants. The amount of assimilated CO 2 in the stem, leaves and branches was higher for 12-monthold plants grown at larger spacing and with irrigation. The estimated energy of the stem increased with increased spacing. Bark was the shoot component least influenced by spacing and irrigation. ESTIMATIVA ENERGÉTICA E ESTOQUE DE CARBONO EM POVOAMENTOS DE EUCALIPTO DE CURTA ROTAÇÃO RESUMO:A utilização da biomassa como fonte de energia alternativa tem obtido destaque por suas características energéticas, contribuição ambiental e por ser fonte de energia renovável em curto período de produção. O trabalho objetivou avaliar a produção da biomassa e sequestro de carbono de eucalipto em diferentes condições de crescimento. Foram determinadas a densidade básica da madeira, volume individual com e sem casca, biomassa seca, carbono acumulado, dióxido de carbono assimilado e estimativa energética dos componentes da parte aérea de dois clones do híbrido de E. grandis x E. urophylla aos 6 e 12 meses de idade, em diferentes espaçamentos e provenientes de duas áreas, uma irrigada e outra não irrigada. Os maiores valores de biomassa seca e massa de carbono foram provenientes dos clones nos espaçamentos mais adensados e região irrigada. O efeito da irrigação foi significativo nas variáveis estudadas apenas nos clones com 12 meses. A quantidade de CO 2 assimilada no fuste, folha e galho foram maiores nos espaçamentos mais amplos e região irrigada dos clones com 12 meses. A estimativa energética do fuste aumentou com a ampliação do espaçamento. Entre os componentes arbóreos, a casca sofreu menor influência dos espaçamentos e irrigação.

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Produção e distribuição de biomassa em Eucalyptus camaldulensis Dehn. em resposta à adubação e ao espaçamento

Cited by 33 publications

References 3 publications

EFFECT OF PLANTING AGE AND SPACING ON ENERGY PROPERTIES OF Eucalyptus grandis W. Hill EX Maiden

EFFECT OF PLANTING AGE AND SPACING ON ENERGY PROPERTIES OF Eucalyptus grandis W. Hill EX Maiden

Consortium of eucalyptus with forage sorghum in semiarid of Minas Gerais State

Energy Estimate and Carbon Stock in Short-Rotation Eucalyptus Stands

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