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oxygen saturation in water butts
On 6/07/2015 10:37 PM, Chris Hogg wrote:
On Mon, 06 Jul 2015 22:23:31 +1000, Fran Farmer wrote: On 5/07/2015 9:02 PM, Emery Davis wrote: Was wondering about this as I watched a very welcome rain shower this morning, but couldn't find much information. Hoping one of our resident chemists might know something about it. We all know that root oxygenation is super important for our plants I didn't know that and this post is the first I've ever heard of it. and in pots can be difficult if soil becomes compacted and/or water logged. One remedy I've found is using hydrogen peroxide to super-saturate water for pots, where the plants seem to really appreciate it. Watching the rain I imagined that rainfall has a high dissolved oxygen saturation point. But then I wondered, since raindrops form at fairly high altitudes, maybe this is not so? But anyway rolling across the roof and down a pipe should oxygenate the rainwater, so that upon filling the water butt should have healthy saturation levels. After sitting around for a month though, perhaps not... it does get a bit of a stink to it. Would this water be essentially anoxic and so problematic to water with? Or does pouring it into buckets and shaking it around oxygenate sufficiently? Enquiring minds, and all that... TIA for any insights. Indeed. Now I'm going to have to find out about "root oxygenation". I'd always been told that rainwater was good for plants because it contained nitrogen. Well, that's true. One of the main pollutants from car exhausts are oxides of nitrogen. These dissolve in rainwater and contribute nitrates to the soil. Whether there's actually enough to make a significant difference to soil fertility, I don't know. Before cars came along, lightning was the main source oxides of nitrogen in the atmosphere. Thanks for that Chris. That's pretty much in line with what I'd read on nitrogen in rain. 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. |
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