Influence of contrasting stocking densities on the dynamics of above-ground biomass and wood density of Eucalyptus benthamii, Eucalyptus dunnii, and Eucalyptus grandis for bioenergy in Uruguay

Resquín, Fernando; Navarro-Cerrillo, Rafael M.; Carrasco-Letelier, Leónidas; Rachid-Casnati, Cecilia

doi:10.1016/j.foreco.2019.02.007

Cited by 41 publications

(21 citation statements)

References 35 publications

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“…In this sense, for 22-month-old crops, the tendency to increase biomass productivity by increasing the crop density seems to depend on the species, and, the effects of the species on productivity depend on the planting density. The highest biomass productivity was obtained at the Paysandú site mainly because of the higher initial survival compared with the Tacuarembó site as reported earlier ( Resquin et al., 2019 ). Those authors considered that the lower survival at the Tacuarembó site was caused by less soil preparation before planting and less weed control during the initial growth phase.…”

Section: Discussionsupporting

confidence: 71%

“…The average increase in biomass production for extreme planting densities (6,660 vs 2,220 trees per hectare) at Paysandú and Tacuarembó was 39 and 86%, respectively. This difference in response could be explained by the greater survival recorded at Paysandú ( Resquin et al., 2019 ), which may reflect greater competition between individual trees for all the spacings evaluated. In all cases, tripling the tree population (6,660 vs 2,220 trees ha −1ha led to disproportionate increases in productivity.…”

Section: Discussionmentioning

confidence: 95%

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Bioethanol production using high density Eucalyptus crops in Uruguay

Bonifacino

Resquín

Lopretti

et al. 2021

Heliyon

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Section: Discussionsupporting

confidence: 71%

Section: Discussionmentioning

confidence: 95%

Bioethanol production using high density Eucalyptus crops in Uruguay

Bonifacino

Resquín

Lopretti

et al. 2021

Heliyon

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“…It is well known that variations in silvicultural treatments and forest management strategies cause changes in tree growth and wood properties (Zobel & Jett 1995). The effect of the plantation spacing on wood density has been widely investigated and many studies reported variable trends in Eucalyptus, as pointed out by Resquin et al (2019). However, the influence of plant spacing on bark production is not well established.…”

Section: Introductionmentioning

confidence: 99%

Effect of stand density on longitudinal variation of wood and bark growth in fast-growing Eucalyptus plantations

Ramalho¹,

Pimenta²,

Goulart³

et al. 2019

iForest

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The influence of tree spacing on the wood/bark ratio is unknown in young fastgrowing Eucalyptus trees. The objective of this study was to evaluate the effect of plant spacing on the wood and bark production along the Eucalyptus stem. Four genetic materials were planted in four spacings: 3×1 m, 3×2 m, 3×3 m and 3×4 m. Three 5-year-old trees from each clone and in each plant spacing were harvested. Cross-sectional discs (thickness: 30 mm) were cut from each tree along the stem (0%, 25%, 50%, 75% and 100% of the total tree height) and at 1.3 m above ground, totaling 288 disks (4 spacings × 4 clones × 3 replicates × 6 axial positions). The wood thickness was measured at six random and equidistant points around the perimeter using a gauge and means were calculated from each disc. Six cross diameters were measured for each debarked disc. After obtaining the averaged bark thickness and wood diameter, the bark content was calculated as the ratio between the surface area occupied by the bark and the total area of the stem in each level. In the narrowed plant spacing (3×1), the trees had a mean diameter of 7.4 cm, while at the spacing 3×4 the diameter of the trees was 91% higher (14.11 cm) at breast height. The increase in plant spacing from 3 to 12 m 2 per tree resulted in an increase in bark thickness (56.7%) from 1.94 mm to 3.04 mm, but caused a reduction of bark content (16%) from 9.66% to 8.11%. Our findings show that trees grown under wider spacing tend to produce thicker bark. The bark thickness and the effect of plant spacing on the bark thickness decreased in the base-top direction. The correlation between bark thickness and wood diameter increases from 0.682 to 0.825 with the increase of spacing between trees. In contrast, the bark thickness to bark content correlation decrease from 0.735 to 0.15 with increased plant spacing. The stand density significantly affected the variation of the stem diameter, bark thickness and bark content of Eucalyptus plantations.

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“…Planting spacing is one of the main factors to be considered when planning and implementing forestry projects for the production of wood. The distance between trees represented by the useful area results in economic, silvicultural and technological implications, influencing the cost of forest production, the growth rate and age of trees, forestry practices and the quality of the wood produced (Eloy et al 2016, Rocha et al 2016, Moulin et al 2017, Brito et al 2019, Resquin et al 2019, Souza et al 2020.…”

Section: Introductionmentioning

confidence: 99%

“…Studies that report the influence of spacing on the properties of Eucalyptus wood concentrate basically on the basic density of the wood (Alcorn et al 2007, Lasserre et al 2009, Moulin et al 2017, and the knowledge on information that precisely addresses the impact of planting spacing of young trees on the anatomy and chemical composition of wood is incipient. Although the short rotation periods provide greater volumes of wood, it is essential to guarantee conditions that allow the proper establishment of the forest crop (Resquin et al 2019), and consequently, quality wood.…”

Section: Introductionmentioning

confidence: 99%