Effect of deployment-type on stem growth, biomass partitioning and crown characteristics of juvenile Sitka spruce clones

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Title: Effect of deployment-type on stem growth, biomass partitioning and crown characteristics of juvenile Sitka spruce clones
Authors: Donnelly, Liam
Grant, Olga
O'Reilly, Conor
Permanent link: http://hdl.handle.net/10197/8461
Date: 31-Jan-2017
Abstract: 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.
Funding Details: Department of Agriculture, Food and the Marine
Type of material: Journal Article
Publisher: The Finnish Society of Forest Science
Keywords: Biomass partitioningClonesDeployment-typeProductivityPicea sitchensis
DOI: 10.14214/sf.1714
Language: en
Status of Item: Peer reviewed
Appears in Collections:Agriculture and Food Science Research Collection

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