co2 though water on a DWC/RDWC

dtischerd said:

CO2 only benefits the leaves.

the roots need oxygen.

i learned waaay back in grade school that plants breathe in carbon dioxide and breathe out oxygen.

wanna kill your plant real quick? pump CO2 thru your airstone and see what happens.

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Chopsticks33 said:

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

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espoker19 said:

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/

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espoker19 said:

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/

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superstoner1 said:

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.

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