Biomass yield and calorific value of six clonal stands of Eucalyptus urophylla S. T. Blake cultivated in Northeastern Brazil

Andrade, Thiago Cavalcante Gomes Ribeiro de; Barros, Nairam Félix de; Dias, Luiz Eduardo; Azevedo, Maria Inês Ramos

doi:10.1590/s0104-77602013000300014

Cited by 9 publications

(5 citation statements)

References 2 publications

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“…In Brazil, a potential alternative energy source is biomass from forests, particularly from the genus Eucalyptus, which has several selected clonal stands for energy production [1]. The need for a biomass that is fast growing, relatively low cost, and highly productive has been the main motivation to explore the potential for bioenergy production from eucalyptus [2].…”

Section: Introductionmentioning

confidence: 99%

Investment Uncertainty Analysis in Eucalyptus Bole Biomass Production in Brazil

Simões

Dinardi

Silva

2018

Forests

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Forestry investment projects for the biomass production of the eucalyptus bole can be characterized by uncertain environments, which result in economic risk to the forest producer, however that can be measured by applying probabilistic techniques. This was our motivation and justification for analyzing the economic-financial viability of different silvicultural practices for eucalyptus bole biomass production under conditions of uncertainties, running Monte Carlo method for risk management. The experiment was carried out in the state of São Paulo, Brazil, using 5 treatments with spacings of 3 m × 2 m; 3 m × 1 m; 1.5 m × 2 m; 3 m × 0.5 m; and 1.5 m × 1.0 m, i.e., different spacings between planting lines and plants. These treatments were characterized as investment projects. To develop stochastic models, we relied on technical-economic deterministic variables. We evaluated the investment projects based on the cash flows under conditions of uncertainty, discounted at the attractiveness rate calculated by capital asset pricing model. With the results of these economic flows, the net present value, the modified internal rate of return and the profitability index values were estimated, commonly used in the analysis of investments in projects. The results showed that based on economic metrics, the three-year rotation cycle for forest stands for biomass production of the main bole of eucalyptus, with a spacing of three meters between rows and two meters between plants, had an 83% probability of economic success. The sensitivity analysis showed that the bole biomass of eucalyptus is the most important variable for determining the economic-financial feasibility of the investment project.

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Section: Introductionmentioning

confidence: 99%

Investment Uncertainty Analysis in Eucalyptus Bole Biomass Production in Brazil

Simões

Dinardi

Silva

2018

Forests

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“…High bark volume (%) is unsuitable for bioenergy and coal generation, since its mineral content can generate greater amounts of ash in the burning process. This ash is corrosive and accumulates in the furnace, thus, it forces intermittent pauses during the process for machine cleaning (ANDRADE et al, 2013).…”

Section: Discussionmentioning

confidence: 99%

Growth and Energy Quality of Eucalyptus Wood in Different Crop-Livestock-Forest Spatial Arrangements

Tonini

Morales

Wruck

et al. 2020

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The aim of the present study was to assess the growth and energetic properties of genetic material of eucalyptus grown in several integrated crop-livestock system spatial arrangements in Barra-do-Garças City (MT). The genetic material of 76-month old Eucalyptus spp from eight spatial arrangements were assessed according to the following properties: diameter, height and volume growth, mortality rate, dry matter yield, sapwood to heartwood ratio, form factor, bark volume, basic density, superior calorific value, ash content, volatile matter, fixed carbon and trunk energy. Data analysis was performed by adjusting growth function, test for model identity and parameters equality and ANOVA tests to Scott-Knott’s mean clustering test. Eucalyptus grandis x E. urophylla clones from recorded the highest energy efficiency due to their high yield volume, which was decisive to determine estimated energy available per tree and cropland area. Growth, stem shape and basic density varied among, and within, the same genetic materials, depending on their respective spatial arrangement. However, solid biomass properties (high calorific value, ash content, fixed carbon and volatile matter) remained stable.

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“…Growth differences have been found in many cold tolerant Eucalypt species tested under South African growing conditions [28][29], signifying the importance of site-species matching, as well as site-provenance matching [30][31]. Differences between genetic materials of Eucalypts as to biomass yield and distribution have been attributed to varying adaptability to local conditions as reported by several authors in [32]. Biomass accumulation is a result of greater or more effective capture of growth inducing resources such as water, nutrients and/or solar radiation.…”

Section: Discussionmentioning

confidence: 99%

Growth Performance of Eucalypt Clones in Tanzania

Pima¹,

S.A.O.²,

Iddi³

et al. 2016

eer

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A research study was conducted to assess the growth performance of Eucalypt clones in Tanzania. Eucalypt clones of Eucalyptus grandis x E. camaldulensis (GC), E. grandis x E. urophylla (GU), E. grandis x E. tereticornis (GT) were established in Lushoto, Kwamarukanga, Kibaha and Tabora sites. Survival, Diameter at breast height, height and biomass were collected while volume and basal area were evaluated. All assessed variable were subjected to ANOVA. Significant (p<0.05) clonal difference in survival, Dbh, height, basal area, volume and biomass between clones was observed. Survival was >90% in Lushoto and Kwamarukanga sites where as the other sites showed intermediate and low survival. Clones at Lushoto site had highest Dbh, height, basal area, volume, Mean annual increment and biomass followed by clones at Kwamarukanga, Kibaha and Tabora sites. It was concluded that at 8 year old Eucalypt clones showed good survival and growth needed for various uses. This study recommended that GC581, GC584 and GU608 are better for Lushoto, GC15, GC167 and GC940 for Kibaha, GC514, GT529 and GC940 for Kwamarukanga and GC15, GC584 and GC940 for Tabora. The outstanding clones are recommended for planting in areas with climatic conditions similar to the sites where they were tested.

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Biomass yield and calorific value of six clonal stands of Eucalyptus urophylla S. T. Blake cultivated in Northeastern Brazil

Cited by 9 publications

References 2 publications

Investment Uncertainty Analysis in Eucalyptus Bole Biomass Production in Brazil

Investment Uncertainty Analysis in Eucalyptus Bole Biomass Production in Brazil

Growth and Energy Quality of Eucalyptus Wood in Different Crop-Livestock-Forest Spatial Arrangements

Growth Performance of Eucalypt Clones in Tanzania

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