I am wondering whether orchids could absorb nitrogen gas (which constitutes 78% of earth atmosphere) directly through the stomata. and use it that way?
Does anybody know the answer for this question?

Plants cannot directly absorb nitrogen from the atmosphere. Gaseous nitrogen (N2) is chemically stable and not usable by plants. There are some bacteria that can convert atmospheric nitrogen into ammonium ions.

All of a plant's nitrogen must be absorbed from its growing medium, either in organic forms or as the inorganic ions nitrate (NO3-), ammonium (NH4+), and nitrite (NO2-).

--Stephen

Thanks Stephen
So I Guess it is no way I can skip the fertilizing chores.:p
Don't laugh but the reason I ask is that the legend has that there are taoist hermits who live in mountainous areas in China & Korea, who hardly eat anything, just practice what they called eating the air (I guess certain methods of breathing) and live for hundred of years.
So I wonder whether the orchids may do the same.
(perhaps I am very gullible, but nobody ever come up with proof that these hermits absolutely do not exist either, remember those Coelacanth that thought to be extint):p

Thanks Stephen
So I Guess it is no way I can skip the fertilizing chores.:p
Don't laugh but the reason I ask is that the legend has that there are taoist hermits who live in mountainous areas in China & Korea, who hardly eat anything, just practice what they called eating the air (I guess certain methods of breathing) and live for hundred of years.
So I wonder whether the orchids may do the same.
(perhaps I am very gullible, but nobody ever come up with proof that these hermits absolutely do not exist either, remember those Coelacanth that thought to be extint):p

Maybe not so gullible Hien. I've heard such stories before and I also remember a TV short on a man in Los Angles who practiced this as well. Just because something is beyond reason doesn't necessarily mean it doesn't exist!

Having said that, Steven's assertion is correct. Don't stop fertilizing them!

Tom
No wonder my seedlings look kind of on the skinny side.