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Articles containing the keyword 'deployment-type'

Category : Research article

article id 1714, category Research article
Liam Donnelly, Olga M. Grant, Conor O’Reilly. (2017). Effect of deployment-type on stem growth, biomass partitioning and crown characteristics of juvenile Sitka spruce clones. Silva Fennica vol. 51 no. 1 article id 1714. https://doi.org/10.14214/sf.1714
Keywords: productivity; Picea sitchensis; biomass partitioning; clones; deployment-type
Highlights: Deployment x clone interactions reduced tree height and diameter growth in mixed plots for one clone; Height and diameter heterogeneity was significantly greater in mixed plots; Deployment-type significantly altered relationships between crown variables and competition was more asymmetric in mixed plots compared to monoclonal.
Abstract | Full text in HTML | Full text in PDF | Author Info

Competitive interactions in clonal forestry are not well understood and this needs to be addressed to develop better deployment strategies. Eight juvenile Sitka spruce (Picea sitchensis (Bong.) Carriére) clones were grown in monoclonal and clonal mixtures in a field experiment for three years to assess the effects of genetic diversity on shoot growth, above- and below-ground biomass partitioning and crown characteristics. Shoot elongation was measured throughout the growing season, while diameter was measured twice annually in May and December. After the third year, crown silhouette area was estimated from digitised images for one ramet per plot and ramets were then destructively harvested. Deployment × clone interactions were observed for tree height and diameter with reductions observed in mixed plots. Mixed plots had significantly greater height and diameter heterogeneity and more asymmetrical competition than monoclonal plots. Results from this study demonstrate that stem growth can be significantly altered when clones are planted in multi-clonal mixtures but for most clones, deployment-type will not significantly reduce their productivity.

  • Donnelly, UCD Forestry, University College Dublin, Belfield, Dublin 4, Ireland E-mail: liam.donnelly@ucdconnect.ie (email)
  • Grant, UCD Forestry, University College Dublin, Belfield, Dublin 4, Ireland E-mail: olga.grant@ucd.ie
  • O’Reilly, UCD Forestry, University College Dublin, Belfield, Dublin 4, Ireland E-mail: conor.oreilly@ucd.ie

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