peakstreaker
Member
Just wondering if there has been any documented testing done where co2 is provided though the water in a RDWC/DWC system. This would make monitoring a DIY co2 method a lot easier if the results are any good.
co2 though water on a DWC/RDWC
- Thread starter peakstreaker
- Start date
Huel Perkins
Well-Known Member
That pretty much covers it... Also, co2 is one of the heavier elements in the air, if you do attempt to supplement it into your garden it should be delivered from above the plants.
Chopsticks33
Active Member
im doing a seal room co2 with ucdwc system. im using co2 at 1500 ppm. the air pump are in the room also. will my air pump pumping co2 thru my water. will this kill my root? please let me know
superstoner1
Well-Known Member
it is not near enough to saturate a res and cause a problem
espoker19
Active Member
Plants most definitely assimilate carbon through their roots, especially when CO2 starved or during high growth periods. Adding extra CO2 has little benefit, however, as over 95% of carbon is assimilated through the leaves. Also, adding PURE oxygen to root mediums is not a great idea either, unless you are running hot reservoir temps. It will increase the root metabolism too much and siphon off too many photosythesates (sugars) from the shoots resulting in too much root growth. Its funny you always see people showing their "root porn" and they have a root ball that's 4 times the weight of their plant. That is actually terrible as the shoot/root dry weight ratio should always be more then 1 otherwise you have wasted a shit ton of energy growing roots and not bud.
"The uptake of C[SUP]14[/SUP]O[SUB]2[/SUB] by the roots of intact tomato plants from solution containing Na[SUB]2[/SUB]C[SUP]14[/SUP]O[SUB]3[/SUB] was studied at different light intensities as well as in darkness.Where plants had previously been
starved
for CO[SUB]2[/SUB] for 12 hours, a higher rate of C[SUP]14[/SUP] uptake was observed than with plants which had been transferred directly from the soil to the radioactive solution.
In general, the C[SUP]14[/SUP] content of the roots was slightly higher than that of the shoots. At light intensities under the compensation point and in darkness the C[SUP]14[/SUP] content of the shoots relative to the roots decreased. This was accompanied by release of C[SUP]14[/SUP]O[SUB]2[/SUB] during respiration, indicating that the absorbed C[SUP]14[/SUP]was readily translocated upwards and released as C[SUP]14[/SUP]O[SUB]2[/SUB] under these conditions. At light intensities above the compensation point no C[SUP]14[/SUP]O[SUB]2[/SUB] was released."
http://www.springerlink.com/content/x53wu314516711nj/
"The uptake of C[SUP]14[/SUP]O[SUB]2[/SUB] by the roots of intact tomato plants from solution containing Na[SUB]2[/SUB]C[SUP]14[/SUP]O[SUB]3[/SUB] was studied at different light intensities as well as in darkness.Where plants had previously been
In general, the C[SUP]14[/SUP] content of the roots was slightly higher than that of the shoots. At light intensities under the compensation point and in darkness the C[SUP]14[/SUP] content of the shoots relative to the roots decreased. This was accompanied by release of C[SUP]14[/SUP]O[SUB]2[/SUB] during respiration, indicating that the absorbed C[SUP]14[/SUP]was readily translocated upwards and released as C[SUP]14[/SUP]O[SUB]2[/SUB] under these conditions. At light intensities above the compensation point no C[SUP]14[/SUP]O[SUB]2[/SUB] was released."
http://www.springerlink.com/content/x53wu314516711nj/
espoker19
Active Member
Composition of dry atmosphere, by volume[SUP][3][/SUP]ppmv: parts per million by volume (note: volume fraction is equal to mole fraction for ideal gas only, see volume (thermodynamics))GasVolumeNitrogen
(N[SUB]2[/SUB])780,840 ppmv (78.084%)
Oxygen (O[SUB]2[/SUB])209,460 ppmv (20.946%)
Argon (Ar)9,340 ppmv (0.9340%)
Carbon dioxide (CO[SUB]2[/SUB])394.45 ppmv
CO2, even at 1500 ppm, is still only .5%ish of O2. So you're fine.
peakstreaker
Member
Plants most definitely assimilate carbon through their roots, especially when CO2 starved or during high growth periods. Adding extra CO2 has little benefit, however, as over 95% of carbon is assimilated through the leaves. Also, adding PURE oxygen to root mediums is not a great idea either, unless you are running hot reservoir temps. It will increase the root metabolism too much and siphon off too many photosythesates (sugars) from the shoots resulting in too much root growth. Its funny you always see people showing their "root porn" and they have a root ball that's 4 times the weight of their plant. That is actually terrible as the shoot/root dry weight ratio should always be more then 1 otherwise you have wasted a shit ton of energy growing roots and not bud.
"The uptake of C[SUP]14[/SUP]O[SUB]2[/SUB] by the roots of intact tomato plants from solution containing Na[SUB]2[/SUB]C[SUP]14[/SUP]O[SUB]3[/SUB] was studied at different light intensities as well as in darkness.Where plants had previously beenstarvedfor CO[SUB]2[/SUB] for 12 hours, a higher rate of C[SUP]14[/SUP] uptake was observed than with plants which had been transferred directly from the soil to the radioactive solution.
In general, the C[SUP]14[/SUP] content of the roots was slightly higher than that of the shoots. At light intensities under the compensation point and in darkness the C[SUP]14[/SUP] content of the shoots relative to the roots decreased. This was accompanied by release of C[SUP]14[/SUP]O[SUB]2[/SUB] during respiration, indicating that the absorbed C[SUP]14[/SUP]was readily translocated upwards and released as C[SUP]14[/SUP]O[SUB]2[/SUB] under these conditions. At light intensities above the compensation point no C[SUP]14[/SUP]O[SUB]2[/SUB] was released."
http://www.springerlink.com/content/x53wu314516711nj/
Thanks that was what I was looking for. the link was not the fastest thing to read but it did answer my question and shined some new light
mike91sr
Well-Known Member
Plants most definitely assimilate carbon through their roots, especially when CO2 starved or during high growth periods. Adding extra CO2 has little benefit, however, as over 95% of carbon is assimilated through the leaves. Also, adding PURE oxygen to root mediums is not a great idea either, unless you are running hot reservoir temps. It will increase the root metabolism too much and siphon off too many photosythesates (sugars) from the shoots resulting in too much root growth. Its funny you always see people showing their "root porn" and they have a root ball that's 4 times the weight of their plant. That is actually terrible as the shoot/root dry weight ratio should always be more then 1 otherwise you have wasted a shit ton of energy growing roots and not bud.
"The uptake of C[SUP]14[/SUP]O[SUB]2[/SUB] by the roots of intact tomato plants from solution containing Na[SUB]2[/SUB]C[SUP]14[/SUP]O[SUB]3[/SUB] was studied at different light intensities as well as in darkness.Where plants had previously beenstarvedfor CO[SUB]2[/SUB] for 12 hours, a higher rate of C[SUP]14[/SUP] uptake was observed than with plants which had been transferred directly from the soil to the radioactive solution.
In general, the C[SUP]14[/SUP] content of the roots was slightly higher than that of the shoots. At light intensities under the compensation point and in darkness the C[SUP]14[/SUP] content of the shoots relative to the roots decreased. This was accompanied by release of C[SUP]14[/SUP]O[SUB]2[/SUB] during respiration, indicating that the absorbed C[SUP]14[/SUP]was readily translocated upwards and released as C[SUP]14[/SUP]O[SUB]2[/SUB] under these conditions. At light intensities above the compensation point no C[SUP]14[/SUP]O[SUB]2[/SUB] was released."
http://www.springerlink.com/content/x53wu314516711nj/
Good info, thanks for sharing. Just to play devil's advocate on the wasted energy growing roots: Wouldn't building a larger root system in veg make a more shared workload when it comes time to focus on buds? Yes it'll probably take a little more veg time to get there, but the benefits could be worth it. What do you think?
superstoner1
Well-Known Member
larger, better, healthy roots will always make happier plants. i have always strived for healthy root mass and a good beneficial bacteria will always do it.
