Biomass and Volume Yield in Mature Hybrid Poplar Plantations on Temperate Abandoned Farmland

Truax, Benoît; Gagnon, Daniel; Fortier, Julien

doi:10.3390/f5123107

Cited by 56 publications

(53 citation statements)

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“…Change of allometry between coarse roots and shoots has also been reported in lodgepole pine (Pinus contorta) stands along a stress gradient in forests of the subboreal zone [31]. Furthermore, poplar genotype could influence patterns of biomass allocation to coarse roots since significant genotype effects were observed on the relationships between DBH and different aboveground biomass components of even-aged plantations [32].…”

Section: Introductionmentioning

confidence: 98%

“…The Bedford and Brompton sites have a high site fertility and high aboveground woody biomass yields (11.4 and 9.6 t/ ha/year after 13 years), while the Melbourne and SteCatherine sites have moderate site fertility and moderate yields (5.2 and 6.1 t/ha/year after 13 years) [32] (Table 1). The four study sites are located within a radius of 50 km, with all plantations sites being nearly flat, with slopes always under 5 %.…”

Section: Site Description and Experimental Designmentioning

confidence: 99%

“…Shoot to root ratios of 13-year-old poplar plantations were calculated at the plot level by dividing total aboveground woody biomass (data from Truax et al [32]) by total coarse biomass data calculated with general and environmentspecific allometric relationships developed in this study. Our shoot to root ratios did not take into account fine root biomass nor coarse root biomass that would have been found below 60 cm depth, although some coarse roots were observed below this depth in most excavated pits.…”

Section: Coarse Root Biomass and Shoot To Root Ratio Calculationsmentioning

confidence: 99%

“…The first objective of this study was to develop a general allometric relationship between DBH and coarse root biomass for mature poplar plantations. The second objective was to use this allometric relationship to estimate coarse root biomass of the three hybrid poplar clones across the four sites, but also to estimate shoot to root ratio using aboveground biomass data of Truax et al [32], which were collected in the same year. We also verified the plastic allometry hypothesis [45] for coarse root biomass growth in contrasted plantation environments by testing the significance of the site effect and DBH, as a continuous covariate, on coarse root allocation using analysis of covariance (ANCOVA).…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Plastic Allometry in Coarse Root Biomass of Mature Hybrid Poplar Plantations

et al. 2015

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In this study, we sampled coarse root biomass of three poplar clones in four 13-year-old hybrid poplar (Populus spp.) plantations, with the objective of developing an allometric relationship between diameter at breast height (DBH) and coarse root biomass. A second objective was to test significance of site, clone and ×site clone interaction effects on coarse root biomass, using analysis of covariance (ANCOVA), with DBH as a covariate. Across the four sites, the general allometric relationship between DBH and coarse root biomass was highly significant (R 2 =0.78, p<0.001). However, given the high significance of the site effect (p< 0.001) in the ANCOVA and the differences in data distribution between sites, two allometric relationships were developed based on the fertility class of sites (high and moderate). Environmentspecific allometric relationships developed for two site fertility classes had a better fit (R 2 =0.81-0.90, p<0.001). ANCOVA, with DBH as a covariate and site fertility class as a main effect, also showed that both of these variables significantly affected (p <0.001) coarse root biomass allocation. Environmentspecific equations showed that higher coarse root biomass was allocated in harsher environments for a given DBH, probably to improve access to growth limiting soil nutrients or to build-up larger storage sites for amino acids and non-structural carbohydrates. Consequently, poplar coarse root biomass growth is both driven by ontogeny (size) and environment, reflecting the plasticity of the root system of mature poplars. Implications of using general vs. environment-specific equations in estimating stand-level root biomass and shoot to root ratios are discussed. Shoot to root ratios calculated using environment-specific equations were more strongly correlated to key environmental variables than ratios calculated using the general equation, with soil NO 3 supply rate being the strongest predictor of the ratio (R 2 =0.90, p<0.001).

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Section: Introductionmentioning

confidence: 98%

Section: Site Description and Experimental Designmentioning

confidence: 99%

Section: Coarse Root Biomass and Shoot To Root Ratio Calculationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Plastic Allometry in Coarse Root Biomass of Mature Hybrid Poplar Plantations

et al. 2015

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“…plantations are an important source of wood, pulp and biomass in much of the temperate northern hemisphere. Poplar plantations are established mainly on marginal agricultural land [1][2][3][4][5][6][7][8]. Poplar is less commonly planted on forest land [9][10][11]; such lands hold much potential for the expansion of poplar production.…”

Section: Introductionmentioning

confidence: 99%

Influence of Cutting Type and Fertilization in Production of Containerized Poplar Plants

Böhlenius

Fransson

Holmström

et al. 2017

Forests

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Most poplar plantations are planted on marginal agricultural land, but poplar plantations also hold the potential for increased profits compared to plantations of other species on non-agricultural, previously forested land. To date, the establishment of poplar plantations on previously forested land is limited by the production of suitable containerized poplar stock for planting. The objective of this study is to investigate how different cutting quality and fertilizer treatments influence height, diameter, and root biomass growth and root-to-shoot ratio, all important variables for plant establishment. Our results show that fertilization increases plant growth and that single-bud and two-bud cuttings with cutting diameters of 5 to 10 mm can be used in the production of containerized plants. Root biomass was similar between these plant types but the number of roots per plant was higher if two-bud cuttings were used. In contrast to fertilized plants, only one cutting type (two-bud 10 mm) grew to a sufficient height and diameter for use in poplar plantation establishment. Interestingly, the root-to-shoot ratio for this cutting type was 0.16 while the ratio for the same cutting type is 0.11 if fertilized. Together, these results suggest that most types of poplar cuttings can be used to establish poplar plantations if fertilizer is used and that the largest cutting type (two-bud 10 mm) might be more suitable to establish poplar plantations at harsh sites, thus reducing the cost of poplar plant production.

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Economic impact of yield and composition variation in bioenergy crops: Populus trichocarpa

Happs

Bartling

Doeppke

et al. 2020

Biofuels Bioprod Bioref

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To achieve a bio-based economy, it is necessary to consider variability within a feedstock population. We must understand the range of key phenotypic characteristics when selecting economically advantageous genotypes for domestication in an optimized supply chain. In this analysis we measured cell-wall composition traits in a large natural variant population of Populus trichocarpa. The results were combined with agronomic growth data from the matching genotype to conduct various techno-economic analyses, evaluating the impacts of physical and compositional variability and determining the ultimate phenotypic drivers for yield and economic metrics. Here we show that, although ethanol yield per land area per year and minimum fuel selling price were most strongly impacted by tree size, when considering the largest 25% of trees, size and carbohydrate content were nearly identical influences on minimal fuel selling price, highlighting the need to focus on both size and carbohydrate content in selecting economically optimal feedstocks.

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Biomass and Volume Yield in Mature Hybrid Poplar Plantations on Temperate Abandoned Farmland

Cited by 56 publications

References 56 publications

Plastic Allometry in Coarse Root Biomass of Mature Hybrid Poplar Plantations

Plastic Allometry in Coarse Root Biomass of Mature Hybrid Poplar Plantations

Influence of Cutting Type and Fertilization in Production of Containerized Poplar Plants

Economic impact of yield and composition variation in bioenergy crops: Populus trichocarpa

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