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oxygen saturation in water butts
On 06/07/15 15:03, Nick Maclaren wrote:
In article , Fran Farmer wrote: I'm not finding much information on root oxygenation. I'm only finding information in hydroponics sites (which accords with the indoor growers of certain substances as a source) but that doesn't seem to have a great deal of application to gardens or my water tanks (=huge butts). I'll keep hunting. Try looking for root aeration. I am pretty sure that plants that can live in bogs and stagnant water can live without oxygen at their roots, but almost all others need it. Any idea if roots excrete material unwanted by the plant? I wonder if the stagnation isn't just lack of oxygen, but concentration of something toxic around the roots (not only from decomposing plant or non-plant material). Not just toxic to the plant, but maybe to any mycorrhizal fungus associated with the plant. It's interesting that many plants can be grown pretty much with their roots soaking wet all the time if the medium is moving (as with hydroponics). That would allow continuous oxygenation, but also remove anything hanging around the roots. -- Jeff |
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