Dr Bruce Bugbee - Toward an Optimal Spectral Quality for Plant Growth and Development
- Thread starter SuperBadGrower
- Start date
SuperBadGrower
Active member
If anything, watch 13:00
Thank you so much Bruce Bugbee & associates
If these results are replicable, a lot of people are going to get really angry hehe
Thank you so much Bruce Bugbee & associates
If these results are replicable, a lot of people are going to get really angry hehe
Last edited:
SuperBadGrower
Active member
Wow... Addendum: Far-red: The Forgotten Photons
In this video, Dr. Bruce Bugbee reviews recent research on the powerful effect of far-red photons on plant growth and development. The summary includes the evidence for the direct value of far-red photons in photosynthesis as well as their value in promoting leaf expansion rate in lettuce. The evidence indicates that we need to redefine photosynthetic photons to include wavelengths beyond 700 nm. The availability of efficient far-red emitting LEDs means that there are immediate commercial applications of this research for indoor agriculture.
https://www.youtube.com/watch?v=sS7aAcacfgk
In this video, Dr. Bruce Bugbee reviews recent research on the powerful effect of far-red photons on plant growth and development. The summary includes the evidence for the direct value of far-red photons in photosynthesis as well as their value in promoting leaf expansion rate in lettuce. The evidence indicates that we need to redefine photosynthetic photons to include wavelengths beyond 700 nm. The availability of efficient far-red emitting LEDs means that there are immediate commercial applications of this research for indoor agriculture.
https://www.youtube.com/watch?v=sS7aAcacfgk
Funny how everyone went all the way from "You only need blue and red" to "Basically all the colors and also UV and far red". I think the answer to the the question of what is the best artificial light for growing plants is really simple. It's the light that best replicates the light of the sun.
About 10 seconds of that last video almost told us about plants feeling at risk, getting into flower sooner. Much like being pot bound can be a trigger.
I have used far-red as a tool to promote stretching. With this academic confirmation, I feel more comfortable with my results. My grow is a mix of various plants. Attaining an even canopy is a large part of getting it right. Where a plant is getting behind, because it's not so tall, I can use far red on that plant to make it taller.
Each photon of light, be them far red, red, blue, whatever, will grow as much plant. So If I put 15% more light over a plant using red red, it's going to grow 15% more. This 15% more is of the stretchy kind of growth though. If I instead used 15% more blue, I would be making more stocky growth so loosing my shorter plant in the shadows. It's the fact that it's 15% more of the stretchy kind, that gets my plant up to the height of it's sisters.
Being the height of it's sisters, increases it's yield. Not just by 15%, but more because it's now got a better position in the canopy.
Our plants are shade avoidance plants. The increase in far red is seen as a shade situation. The response is to stretch. It's not usually useful for us to grow more stem. It's things like leafy greens that really want far red. Their response to shade, is grow bigger leaves. Or plants will also do the bigger leaves, but high up, where they think they can get light and shade their neighbours. This extra leaf is of limited use. It's often just shading leaves they already had lower down. Or shading neighbouring plants. It's a rare case where this kind of elongated growth is of use to us.
I dangle a 100w incandescent lamp over lagging plants. It's been more of an experiment than a relied upon tool. Something found in my pictures, but not spoke of in this great a detail. But it does seem to be true.
I have used far-red as a tool to promote stretching. With this academic confirmation, I feel more comfortable with my results. My grow is a mix of various plants. Attaining an even canopy is a large part of getting it right. Where a plant is getting behind, because it's not so tall, I can use far red on that plant to make it taller.
Each photon of light, be them far red, red, blue, whatever, will grow as much plant. So If I put 15% more light over a plant using red red, it's going to grow 15% more. This 15% more is of the stretchy kind of growth though. If I instead used 15% more blue, I would be making more stocky growth so loosing my shorter plant in the shadows. It's the fact that it's 15% more of the stretchy kind, that gets my plant up to the height of it's sisters.
Being the height of it's sisters, increases it's yield. Not just by 15%, but more because it's now got a better position in the canopy.
Our plants are shade avoidance plants. The increase in far red is seen as a shade situation. The response is to stretch. It's not usually useful for us to grow more stem. It's things like leafy greens that really want far red. Their response to shade, is grow bigger leaves. Or plants will also do the bigger leaves, but high up, where they think they can get light and shade their neighbours. This extra leaf is of limited use. It's often just shading leaves they already had lower down. Or shading neighbouring plants. It's a rare case where this kind of elongated growth is of use to us.
I dangle a 100w incandescent lamp over lagging plants. It's been more of an experiment than a relied upon tool. Something found in my pictures, but not spoke of in this great a detail. But it does seem to be true.
Except nobody ever said that all you need is nitrogen and potassium and then later figured out that you need all the other stuff too.that's like saying the best substrate that works best should replicate soil.
Douglas.Curtis
Autistic Diplomat in Training
Keep in mind, everything is relative. This information was accumulated while doing experiments on yield only. The structural flower formation of cannabis has a lot to do with spectrum, and what grows the highest yield also tends to grow very leafy cannabis.
Always keep things in perspective. I can't wait for him to be able to replicate his experiments with resin/terpene production as the main goal.
Always keep things in perspective. I can't wait for him to be able to replicate his experiments with resin/terpene production as the main goal.
