Well, I humbly disagree.The article answers the questions.
Water can contain much less oxygen than air.
And as I said, it depends on the water/air ratio.
If the roots are misted throughout, they will be wet throughout.
The water forms a barrier, oxygen is only taken up from the water, which as the article says contains much less than the air.
You have a very good water supply with the continuously wet roots, but have less air at the roots.
As the article says, it is a jing and jang with water and air at the roots.
I'm hard headed. And I love me some tools.i tried to teach him how to use a tool once… and only once lol.
Glad you are following along. Let me know when I get too out there, I can certainly be the nutty professor at times.This is nuts to me but totally plausible. I've also never seen it done first hand. +1 @Moe.Red
Yes, the article explains exactly that.You have a thin layer of water on roots. Lets say that is 100% DO for that temp. (actually higher in my system) And the roots steal an O2 molecule trapped in the water. Now the water has space for another O2 molecule. Oh hey, there is an ABUNDANCE of O2 readily available floating around in the res. Just grab a new O2 molecule from the res atmosphere and carry on.
That chart assumes that we are dealing with 21% atmospheric O2. We are not. The chart does not apply to my grow, make sense?Yes, the article explains exactly that.
Dissolved oxygen can be measured in ppm in water. Here is the table for this.
View attachment 1283359
As you say correctly, oxygen is then only absorbed through the water and there can be no more absorbed than the amount dissolved depending on the temperature.
Completely wet roots mean closure of oxygen.
Stupid example, but that's why waterboarding makes you think you're drowning. Water excludes air
Especially if you are working on your own system, I can really recommend manics.
This is a book that the author has put online for free.
All articles are supported by studies and according to current scientific status.
The site says that the book is the grower bible in Australia and New Zealand.
PS: I am not a native English speaker. I have been working intensively with the language for a few years now, but please excuse me if something is misunderstood due to grammatical mistakes
And even if it was 21%, you can absolutely increase O2 sat in water with pressure. This is all well documented. The disks in the fogger create a tiny high pressure zone as a side effect of making fog.
Wait, you do understand that none of that applies, right? I am, thru active methods using Aqua's brain child, making the res as close to pure O2 as I can - again approaching 90%.By mole fraction (i.e., by number of molecules), dry air contains 78.08% nitrogen, 20.95% oxygen
Just under 21% is considerably more than the 10ppm that can be dissolved in water.
But even the 10ppm is enough for the plants in DWC and normal aquaponics systems.
So if your system can increase that, it should be more efficient than other media-less systems.
But Coco also provides much more oxygen than DTW/Aeroponic, because the roots there have contact with the air with 209500ppm oxygen.
At that point, I've shared with you all the info I have on it.
I will look forward to see your system in action then
I'm not ready to say that yet, it may be a flop. But understanding what is actually being tried here is why I was replying. Not to state this is the best, just that my test is different than anything you posted.Yes, I'll have to take another close look at the system. I can see that you can't compare it with Aeroponic and that you've already given it a lot of thought.
But the info on the Coco was perhaps interesting for some people here. Aqua is hopefully still interested in it as well. It's just a bit of scientific confirmation of the merits of his old system.
To the question of whether it's better than hydro, I would definitely say that your system could beat any other media-less system, as far as I can judge now
We are thinking alike. Those tiny water droplets (3 - 5 micron range) are almost all surface area, being blown around and mixed with nearly pure O2 as they float. If there is a way to get more O2 directly to the roots, I don't know what it is.Aren't the % of DO in water only true for stabilized water in an atmospheric equilibrium? I'd think the kinetics in fogponics alone increase through physical mixture.
And yes Moe that way of replenishing is spot on.
Also that any water the root drinks is highly oxygenated so the O2 makes it right into the plant sap.
We shall see. I'd say yes. In an academic book on plant physiology the professor described how the root naturally follows the line between free water & atmosphere. So that the places where the root grows these parts have simultaneously access to both water + free oxygen. This should make it easier for the metabolism there. Plants typically respond positive to an optimization to their environmental condition.Question is will that O2 provide for superior grow?
Yup, you get what I am trying for here, and see the same unknowns. Control is key :)We shall see. I'd say yes. In an academic book on plant physiology the professor described how the root naturally follows the line between free water & atmosphere. So that the places where the root grows these parts have simultaneously access to both water + free oxygen. This should make it easier for the metabolism there. Plants typically respond positive to an optimization to their environmental condition.
The fogponics should create such a "physiological best" situation right over the whole root surface.
But I'm not sure if other factors may also have to be considered. Guess it depends on the control.
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