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secondtry
@ LedDesigner:
EDIT SEE BELOW:
I thought you were referring to the method whereby a leaf is placed in solution to find Pn. However, if that isn't the case I apologize for my assumption. Regardless my point still stands, in that quantitating the photons emitted by a leaf a most often preferred method to find Pn. The reason I thought you were referring to the leaf/solution test was you seem to be inferring you tested Pn without a Pn meter. And note, net Pn (Pnnet) is generally more important than Pn, as is "3-Day LI", etc.
Here is a great chlorophyll fluorometer, check out the "PPM-300" ~$5k:
http://www.ears.nl/ppm/
Here is how it works:
http://www.ears.nl/ppm/technical_background.php
EDIT SEE BELOW:
Secondtry:
Yea like 20 years ago, lol; and that's not an accepted analytical quantitative method anymore AFAIK. Photosynthesis is NOT calculated form O2 production in the 21st Century as you describe, those are high school science experiments, lol. A current accepted method of testing is basically measuring photons around 780 nm that are emited by the leaf. I have to check my notes on a chloropyll fluorometer nm measurements but what I wrote is accurate enough for now.LDD:
Never heard about measuring photosynthesis through measuring O2 production, since that's a quantitative measureable substance produced as a byproduct of the Krebs cycle?Secondtry:
How did you observe photosynthetic response? I hope you used a Pn meter like a chlorophyll fluorometer. But I assume you read that info somewhere because there ain't no way to quantitate photosynthesis on a DIY basis.
I thought you were referring to the method whereby a leaf is placed in solution to find Pn. However, if that isn't the case I apologize for my assumption. Regardless my point still stands, in that quantitating the photons emitted by a leaf a most often preferred method to find Pn. The reason I thought you were referring to the leaf/solution test was you seem to be inferring you tested Pn without a Pn meter. And note, net Pn (Pnnet) is generally more important than Pn, as is "3-Day LI", etc.
Here is a great chlorophyll fluorometer, check out the "PPM-300" ~$5k:
http://www.ears.nl/ppm/
Here is how it works:
http://www.ears.nl/ppm/technical_background.php