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Entry Date
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Location
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Friday, April 09, 2021
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Matt D.
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Connecticut
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Entry 38 of 90 |
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Cold Frame Carbon Dioxide Enrichment
Since the controller has a sensor with a photocell with the addition of grow lights also results in additional hours of carbon dioxide enrichment. For ease of replacement and access the actual controller and bottle are outside of the cold frame. However, this allows for a quick check of the inside environment even if the blankets are on for heat retention.
Overall, the bottle has good pressure so it should be good for at least another week or so. Also, the CO2 levels can be seen which is right in the target range of 1000ppm +/-50ppm (deadband). The target range will differ depending who you may talk to, but in general the 800-1200ppm is the accepted range for maximum yield.
However, to really maximize the benefits of CO2 all other factors need to not be limiting, such as water, temperature and light. This is why official horticulture grow lights with high output bulbs are being used because plants can utilize higher light intensities under carbon dioxide enrichment. This is part of the reason why some bulbs are more expensive than others it often has to do with a combination of the specific spectrum produced, intensity generated and overall quality.
Once these other environmental factors have been optimized, adding CO2 adds considerable growth rates without the fertilizer bloat or other issues when growers “push” plants. With the addition of carbon dioxide a plants that would be at size X at day 30 will be at that same size in less time.
Also, the rooting seems to be more aggressive under carbon dioxide enrichment and while CloneX gel is used to aid in the rooting process the two used in combination seems to have a synergistic impact on the plants which is quite amazing to observe.
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