Rauli (RAU)
Nothofagus alpina (Syn. N. procera and N. nervosa)
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Nothofagus alpina (Syn. N. procera and N. nervosa)
Native to the lower slopes of the Andes in central-southern Chile and western Argentina.
Provenances from the southern part of the natural range or from good quality British stands should be preferred.
A very fast growing light demanding species which will outyield all native British broadleaved species on suitable sites. Not cold hardy throughout Britain and can be killed by temperatures below -18°C; an early flushing species which can be damaged by late spring frosts. For this reason, it is currently only recommended for use close to the western coasts and more generally in the western and milder parts of England and Wales. Best suited to well drained fresh soils of poor to medium nutrient status; does not tolerate very poor nutrient status soils or compacted/waterlogged conditions. Is not tolerant of exposure or drought tolerant.
Mature stands can suffer sudden dieback from Phytophthora pseudosyringae.
Since it is currently cold limited in Britain, this species may benefit from climate warming and be suited to a wider range of sites in northern Britain, wherever its site requirements are met.
Rauli is categorised as a secondary tree species. These are species that have been planted on a much smaller scale than the principal species but are reasonably well understood and have demonstrated their suitability for forestry in terms of stem form, growth rate and hardiness under current conditions and so have potential for wider use in future.
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