Aqua Man
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Yeah in hydro I was seeing well over 2000 ppm at night. Soil not as high.You might be on to something with this one Aqua Man. I am running hydro these days and I am noticing some kind of strange things since flipping to flower. First thing I have noticed is an increased in CO2 usage over Coco. Secondly, I am seeing much higher CO2 levels lights out. I usually see something down to maybe 200 at the end of the 12 hours of lights off but I am seeing more like 650 at the same time in hydro.
The growth rates of Hydro over Soil and well old school Coco are insane. They want more food, CO2 and water. Looking forward to how this one finishes off. I have GMO and Ice Cream Cakes running. Cannot believe the smell coming off of these two strains. GMO is one stinky girl so it the ice cream cakes.Yeah in hydro I was seeing well over 2000 ppm at night. Soil not as high.
Interesting that might help explain the differences I am seeing verses @Aqua Man seeing like 2000 PPM of CO2 at end of lights out because I am pretty sure he runs Micros and I have chosen to run my first couple of hydro runs sterile.My knee-jerk surmising...
Fungi/mycelium breathe like us; O2 in, CO2 out.
Correlation?
Do you know, how do they react/how does CO2 PPM correlate to 24-hour lights on? Do they still cycle at all in a non-light-related circadian rhythm sort of way?Rate of respiration by plants and microbes. This happens constantly but for plants more so at night. So the the co2 we see at night is basically from the plants. Number of plants will have a large impact on how it correlates to ppm
Yes respiration is constant. But during light out respiration rates increase by quite a significant amount. This allows the plant to convert the sugars produced by photosynthesis into we will just call it energy and move it throughout the plant to facilitate growth.Do you know, how do they react/how does CO2 PPM correlate to 24-hour lights on? Do they still cycle at all in a non-light-related circadian rhythm sort of way?
Yeah, me neither. Seems cruel. Cruelty doesn't produce good results (attack me all you want, authentic veal-and-foie-gras-lovers).you may be able to run 24 hrs but I do not suggest it.
Yes you are absolutely right. I should say the balance shifts to far more respiration at night.Everything I can find says that respiration rate does not increase significantly at night, and even decreases slightly due to cooler temperatures. Plants release extra co2 at night because they are still respiring, but are not photosynthesizing.
edit: To clarify, this is not in contradiction to the importance of night cycles.
I believe most of the plant growth occurs lights out, not just to root system.Is accelerated root production/function also carried out at night?
I'd think the plant would have more resources to do so without all that photosynthesizing going on.
And, it would seem, roots are responsible for nearly half of all soil respiration.
It's really going to depend on light intensity. Under low light its a benefit IMO. But I would never grow under low light because the bud production would be crap under 12/12. But an auto... its a good option if you have limited light.Really seem ass-backwards that anyone ever thought 24-hour lights-on would somehow produce more.
I mean, I get it.. you get all that stored energy and then flip to flower and WOOSH... batteries in direct connection to bud production. But.. eh. Seems flawed in a functional approach.
edit: Not to offend. I, too, thought 24-hour lights-on would produce more, faster, once upon a time.
It comes down to the Mols per day. I cannot remember off the top of my head but Bruce B. mentions it in one of his You Tube Video'sIt's really going to depend on light intensity. Under low light its a benefit IMO. But I would never grow under low light because the bud production would be crap under 12/12. But an auto... its a good option if you have limited light.
Its really going to boil down to DLI. Hell you can veg under 16/8 or 24/0 and have similar growth... maybe not structure wise but in terms of mass. If the intensity of the 16/8 is 1/3 higher then growth should be similar in mass.
Around 60 DLI at atmospheric co2. Would be around 925ppfd over an 18hr periodIt comes down to the Mols per day. I cannot remember off the top of my head but Bruce B. mentions it in one of his You Tube Video's
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