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Germination of Sequoia and smoke
It is widely stated that Sequoia seeds have poor germination. Or does that mean that we haven't found the trigger for germination? Last Wednesday I was shown round The Moorbank Botanic Gardens of the University of Newcastle by Prof. Richards(Retd). He showed us a Sequoia wellingtonia about 6ft high and told us its story. As a final-year project, Emma Morebank, a student had studied whether "smoked water" promoted the germination of Sequoia and found that it did. She died died tragically young in 2007, and this tree, one of the ones she had grown, was planted in her memory. Searching Google for "smoke", "Sequoia", and "Germination" I find anecdotal reports suggesting that smoke from the fires which are so important in California promotes germination of Sequoia and this must have been what Morebank was investigating. It makes some kind of sense. For temperature alone to be the trigger, there could only be few degrees between the temperature that would trigger and the temperature that would kill. The chemical products of burning in solution in water would be a much better trigger If so, this is something we could use. We could char or burn wood shavings, sawdust or cut and dried grass in an oven (preferably electric, gas-heated ovens are ventilated) and pop in the seeds when it has cooled down. Or. "Liquid smoke" is available, it seems to be mainly aimed at giving that "Smokey tang" to cooked meats, but it is suggested that it might help germination of Sequoia seeds. Does anybody have any knowledge of these? Michael Bell -- |
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