Matt,
Please pay a little closer attention to what I write. I said if you don't know
the level of carbon dioxide when you start this pseudo experiment and you do
not monitor it over a period of days, you will not know when or if it becomes
rate limiting nor will you know if the added carbon dioxide is actually
boosting levels in the growing area.
It is fine to quote Joe Hanan but know where and in which groups of plants he
worked. When we were at Colorado State together he did a lot of work with
carbon dioxide supplementation. Most of his work was with carnation and after
that with greenhouse roses. In the high light/low temperature Colorado
environment carbon dioxide levels would drop seriously in the necessarily tight
greenhouses and additional input was advantageous. When I last checked, neither
carnation nor rose were CAM cycle plants.
I doubt that I need to reread Yin-Tung's work on Phalaenopsis to gain any new
insights on spiking them as I have possibly spiked more in a twelve month
period than he has done in his lifetime. He is the pre-eminent researcher on
Phalaenopsis in the United States at present. Instead of alluding to his work,
why don't you ask him about whether he considers carbon dioxide supplementation
to be beneficial and actually add to this discussion??
Andy Easton
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