Thuja plicata : provenance experiments and cultivation trials in South Sweden
In times of climate change and an increasing number of threats for native tree species in Sweden and other countries in Europe, exotics as Thuja plicata (Donn ex D. Don) might be considered to a greater extent. This thesis aims to evaluate the establishment and early growth of previously established...
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| Format: | H2 |
| Language: | Inglés German |
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SLU/Southern Swedish Forest Research Centre
2019
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| Summary: | In times of climate change and an increasing number of threats for native tree species in Sweden and other countries in Europe, exotics as Thuja plicata (Donn ex D. Don) might be considered to a greater extent. This thesis aims to evaluate the establishment and early growth of previously established provenance experiments with Thuja plicata in the south of Sweden, to be able to give recommendations for an adequate choice of provenance. In addition, the species´ ecology, as well as experiences of former provenance experiments in other countries than Sweden will be included. Height measurement and damage assessment on four Thuja plicata provenances as well as on Norway spruce from two seed orchards as reference, was carried out in four experiments on three sites in South Sweden. At this stage of stand development, results show Norway spruce in most cases superior regarding height growth and vitality. No significant differences between Thuja plicata provenances could be shown in relation to height development and damage severity. However, trends indicated Horsey Creek and Bench Road as the best growing provenances, while Yola Creek grew the slowest. Damage assessment has proven Horsey Creek as the most vital provenance, whereas Bench Road was the most severely damaged Thuja plicata provenance. Due to highest vitality of the seedlings and good growth on all sites, Horsey Creek will be the recommended provenance for growing conditions in South Sweden. |
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