Growth patterns and biomass productivity of two Salix species grown under short-rotation intensive culture in southern Quebec

1993 ◽  
Vol 4 (6) ◽  
pp. 419-425 ◽  
Author(s):  
Michel Labrecque ◽  
Traian Ion Teodorescu ◽  
Alain Cogliastro ◽  
Stéphane Daigle
Keyword(s):  
Biomass Productivity ◽  
Growth Patterns ◽  
Intensive Culture ◽  
Short Rotation

Early performance and nutrition of two willow species in short-rotation intensive culture fertilized with wastewater sludge and impact on the soil characteristics

1998 ◽  
Vol 28 (11) ◽  
pp. 1621-1635 ◽  
Author(s):  
Michel Labrecque ◽  
Traian I Teodorescu ◽  
Stéphane Daigle
Keyword(s):  
Biomass Productivity ◽  
Wastewater Sludge ◽  
Intensive Culture ◽  
Available N ◽  
Soil Enrichment ◽  
Short Rotation ◽  
Willow Species ◽  
Limiting Nutrient ◽  
Early Performance ◽  
The Impact

Recycling wastewater sludge as fertilizer in short-rotation intensive culture of willows offers a viable opportunity to increase biomass productivity. Salix discolor Mühl. and Salix viminalis L. were planted at two densities (20 000 and 30 000 cuttings/ha), on two sites: a well and a poorly drained site. Three doses of dried and granulated sludge (100, 200, 300, and 0 kg/ha of "available" N) were applied in the spring of the first and the second seasons of growth. The aims of the experiment were to (i) investigate growth and nutritional plant response to fertilization and (ii) estimate the impact of sludge application on the soil. Over two seasons, aboveground biomass was similar for S. discolor and S. viminalis on both sites and for all sludge treatments. Every increment in the sludge dose applied induced an increase in willow productivity. Vector analysis of stem and branch nutrient concentration suggested that nitrogen was the most limiting nutrient. At the end of the second season, plots fertilized with the highest doses of sludge indicated soil enrichment in organic matter. However, nitrate concentration in the soil increased with increasing sludge doses. The accumulation of heavy metals from sludge was not hazardous to the environment according to provincial limits. A moderate dose of dried and pelleted sludge (100 kg/ha "available" N) may reduce nitrate leaching and appears to be a good fertilizer during the establishment of willows.

scholarly journals Willows Used for Phytoremediation Increased Organic Contaminant Concentrations in Soil Surface

2021 ◽  
Vol 11 (7) ◽  
pp. 2979
Author(s):  
Maxime Fortin Faubert ◽  
Dominic Desjardins ◽  
Mohamed Hijri ◽  
Michel Labrecque
Keyword(s):  
Soil Surface ◽  
Field Work ◽  
Field Studies ◽  
Soil Hydrology ◽  
Intensive Culture ◽  
Shrub Species ◽  
Short Rotation ◽  
Pollutant Concentrations ◽  
Polycyclic Aromatic ◽  
Made In

The Salix genus includes shrub species that are widely used in phytoremediation and various other phytotechnologies due to their advantageous characteristics, such as a high evapotranspiration (ET) rate, in particular when cultivated in short rotation intensive culture (SRIC). Observations made in past field studies suggest that ET and its impact on soil hydrology can also lead to increases in soil pollutant concentrations near shrubs. To investigate this, sections of a mature willow plantation (seven years old) were cut to eliminate transpiration (Cut treatment). Soil concentrations of polychlorinated biphenyls (PCBs), aliphatic compounds C10–C50, polycyclic aromatic hydrocarbons (PAHs) and five trace elements (Cd, Cr, Cu, Ni and Zn) were compared between the Cut and the uncut plots (Salix miyabeana ‘SX61’). Over 24 months, the results clearly show that removal of the willow shrubs limited the contaminants’ increase in the soil surface, as observed for C10–C50 and of 10 PAHs under the Salix treatment. This finding strongly reinforces a hypothesis that SRIC of willows may facilitate the migration of contaminants towards their roots, thus increasing their concentration in the surrounding soil. Such a “pumping effect” in a high-density willow crop is a prominent characteristic specific to field studies that can lead to counterintuitive results. Although apparent increases of contaminant concentrations contradict the purification benefits usually pursued in phytoremediation, the possibility of active phytoextraction and rhizodegradation is not excluded. Moreover, increases of pollutant concentrations under shrubs following migration suggest that decreases would consequently occur at the source points. Some reflections on interpreting field work results are provided.

scholarly journals Direct Assessment of Biomass Productivity in Short Rotation Forestry (SRF) with the Terrestrial Laser Scanner (TLS). Case of Study in NE Part of Romania (Preliminary Results)

2020 ◽  
Vol 3 (1) ◽  
pp. 93
Author(s):  
Iulian Constantin Dănilă
Keyword(s):  
Biomass Production ◽  
Laser Scanner ◽  
Biomass Productivity ◽  
Tree Height ◽  
Allometric Equations ◽  
Accurate Information ◽  
Terrestrial Laser Scanner ◽  
North East ◽  
Short Rotation ◽  
Destructive Methods

Short rotation forestry (SRF) provides an important supply of biomass for investors in this area. In the NE (North-East) part of Romania at the present time are installed over 800 Ha of this kind of crops. The SRF enjoys the support through environmental policies, in relation to climate change and the provisions of the Kyoto Protocol to reduce the concentration of CO2 in the atmosphere. A precise estimate of biomass production is necessary for the sustainable planning of forest resources and for the exchange of energy in ecosystems. The use of the terrestrial laser scanner (TLS) in estimating the production of above ground wood biomass (AGWB) of short rotation forestry (SRF) brings an important technological leap among indirect (non-destructive) methods. TLS technology is justified when destructive methods become difficult to implement, and allometric equations do not provide accurate information. The main purpose of the research is to estimate the biomass productivity on tree parts in short rotation forestry with TLS technology. Measuring the hybrid poplars crops by TLS may have the following consequences: (1) Higher accuracy of the estimate of biomass production in the SRF; (2) cost and time effective measurements over the biomass of tree parts; (3) new and validated allometric equations for SRF in NE Romania; (4) solid instrument for industry to estimate biomass. TLS technology gives accurate estimates for DBH, tree height and location, as much as the volume on segments, commercial volume or crown volume can be determined. The accuracy of these values depends on the original scan data and their co-registration. The research will contribute to the development of knowledge in the field of hybrid crops.

Clonal variation in basal area growth patterns during stand development in hybrid poplar

2001 ◽  
Vol 31 (12) ◽  
pp. 2059-2066 ◽  
Author(s):  
Brian J Stanton
Keyword(s):  
Hybrid Poplar ◽  
Basal Area ◽  
Growth Patterns ◽  
Repeated Measurements ◽  
Clonal Variation ◽  
Stand Development ◽  
The Third ◽  
Short Rotation ◽  
Periodic Growth ◽  
Response Variation

Two-year periodic basal area increments (PBAI) of short-rotation Populus stands were followed through a 6-year rotation in monoclonal plots at three sites to assess variation in response patterns among 20 Populus trichocarpa Torr. & Gray × Populus deltoides Bartr. clones. Data were analyzed using a split-plot model for repeated measurements with the main effect of time and the time × clone interaction partitioned into their linear and quadratic orthogonal components. The form of the mean clone growth response was mainly quadratic with PBAI culminating during the second period at 145–160% of the rotation mean. Increments fell to 95–116% of the rotation mean during the following period. Response variation occurred mainly in the degree of linearity at two sites with clones varying in the rate of growth deceleration during the third period, while quadratic response variation was of prime importance at the third site. Changes in basal area levels among the topmost clones over the last stage of stand development were associated with the divergence in the linear and quadratic responses. Selection on the basis of interaction contrasts of periodic growth from monoclonal plot trials is discussed in terms of sustaining yield improvements and maintaining adaptation to short rotation strategies.

Morphological and physiological traits influencing biomass productivity in short-rotation coppice poplar

2004 ◽  
Vol 34 (7) ◽  
pp. 1488-1498 ◽  
Author(s):  
A M Rae ◽  
K M Robinson ◽  
N R Street ◽  
G Taylor
Keyword(s):  
Biomass Yield ◽  
Populus Deltoides ◽  
Hybrid Poplar ◽  
Biomass Productivity ◽  
Biomass Energy ◽  
Short Rotation Coppice ◽  
High Yield ◽  
Breeding Programs ◽  
Basal Diameter ◽  
Short Rotation

Fast-growing hybrid poplar (Populus spp.) have potential as a short-rotation coppice crop grown for biomass energy. This work identifies traits for fast growth studied in an American interspecific pedigree derived from Populus trichocarpa Torr. & A. Gray × Populus deltoides Marsh. grown in the United Kingdom for the first time. The biomass yield after the first coppice rotation was estimated to range from 0.04 to 23.68 oven-dried t·ha–1·year–1. This great range suggests that genotypes from this pedigree may be used to understand the genetic basis of high yield in short-rotation coppice, which would be advantageous for informing breeding programs for biomass crops. Relationships between stem, leaf, cell traits, and biomass yield were investigated. Partial least-squares analysis was used to order the traits by importance. The traits most influential on biomass were maximum stem height throughout the growing season, basal diameter, number of stems, and number of sylleptic branches, which showed high heritability, indicating excellent potential for breeding programs. The leaf traits, leaf area, number of leaves on the leading stem, and plastochron index were also associated with an increase in biomass, leading to a better understanding of this trait.

Crown architecture of short-rotation, intensively cultured Populus.: I. Effects of clone and spacing on first-order branch characteristics

1981 ◽  
Vol 11 (1) ◽  
pp. 73-81 ◽  
Author(s):  
Neil D. Nelson ◽  
Thomas Burk ◽  
J. G. Isebrands
Keyword(s):  
Branch Length ◽  
Major Influence ◽  
Crown Architecture ◽  
Intensive Culture ◽  
First Order ◽  
Order Branch ◽  
Short Rotation ◽  
Growth Increments ◽  
Branch Angle ◽  
Highly Correlated

First-order branch characteristics that have a major influence on crown architecture were quantified for nine 4-year-old Populus clones grown at three spacings (0.3 m × 0.3 m,0.6 m × 0.6 m, 1.2 m × 1.2 m) under short-rotation, intensive culture (SRIC) in northern Wisconsin, U.S.A. The branch characteristics included the number, length, and diameter of branches and the angles of origin and termination. Clone and spacing had statistically significant effects on all branch characteristics, but the clone–spacing interaction was not significant for any branch characteristic. As spacing increased, the number, sum of lengths, and angle of origin of branches increased, but the angle of termination decreased. Branch length and branch diameter were highly correlated within all clones. The correlation between the angles of origin and termination within a clone was low when pooled over all spacings and height growth increments. The two clones with the lowest angle of origin also had the lowest angle of termination, and the clone with the highest angle of origin had the highest angle of termination. The clonal rankings for angles of origin and termination were not otherwise similar. The results indicate that development of a biologically meaningful variable for effective branch angle may be a complex task for SRIC Populus. However, individual clones are recommended for SRIC growth-spacing trials based upon branch angle and other crown architecture data presented.

Species Trials for Biomass Production on Abandoned Farmland

1985 ◽  
Vol 2 (2) ◽  
pp. 43-47 ◽  
Author(s):  
Frederick M. Laing ◽  
Paul E. Sendak ◽  
John Aleong
Keyword(s):  
Energy Use ◽  
Hybrid Poplar ◽  
Intensive Culture ◽  
Hybrid Poplars ◽  
Short Rotation ◽  
Silver Maple ◽  
Species Trials ◽  
Hardwood Tree ◽  
High Yields ◽  
Two Hybrid

Abstract As part of a nationwide study of the potential for woody crops to supply biomass for energy use, we evaluated seven hardwood tree species and six hybrid poplar clones on four different sites in Vermont, with three fertilizer treatments on some sites. Not all species were evaluated on all sites. Plots containing 25 trees were replicated three or four times at each site. Trees were planted at a spacing of 0.6 x 0.6 m or 0.9 x 0.9 m and grown for 3 years. The application of fertilizer did have significant effect on height, diameter, and stem weight. Species with high yields (about 16 oven-dry t/ha/year) included four of the hybrid poplars. Silver maple, black locust, and the other two hybrid poplars yielded about 10 oven-dry t/ha/year. Based on growth alone, these species and clones were recommended for short-rotation intensive culture in areas with similar climate and growing sites. North J. Appl. For. 2:43-47, June 1985.

Sign in / Sign up

Export Citation Format

Share Document