From

Location

Message

Date Posted

San Diego

Just curious, but where does the air come from that fills the cavity of a growing pumpkin, let alone a pumpkin that is doing 60 pounds a day...

7/21/2015 1:32:53 AM

Austria

I think the skin let the air trough

7/21/2015 2:51:47 AM

Upa Creek, MO

If you look closely Cecil has a bike tire pump next to the pkn.

7/21/2015 8:06:52 AM

Central NY

Lol

7/21/2015 11:09:56 AM

San Diego

It would have to come in through the tissue but that is a lot of air to be coming in so fast.

7/21/2015 11:53:23 AM

Menomonie, WI (mail@gr8pumpkin.net)

I think there is no air and it is a vacuum.

7/21/2015 1:42:25 PM

Ham Lake, Minnesota

It's where the plant stores it's farts.

7/21/2015 3:28:46 PM

Little-TON - Colorado

Fair enough question, actually a good one as we know once outside Air getZ in that cavity we got problems dont we. 'Somebody' dont get discouraged...perhapZ we get a real answer from someone who really knowZ.....

7/21/2015 4:06:43 PM

Little-TON - Colorado

I found this....
According to a 1942 study, pumpkins contain approximately 14% Carbon Dioxide and 7 percent Oxygen by volume, so yeah the ratio is different than that of outside air (.0383 % Carbon Dioxide and 20.946% Oxygen)

Here's a link to the 1942 paper. It deals with internal atmospheric conditions of a pumpkin after treating it with paraffin. The graphs on page 5 show starting conditions.

http://www.plantphysiol.org/content/17/4/509.full.pdf

7/21/2015 4:12:37 PM

Germany

Here, in the first entry of this thread, are some results of tests on the composition of the gas phase inside a pumpkin right after drilling a little hole and inserting the probe into the cavity (after weigh-off, of course):

http://crazy-growers.de/showthread.php?2249-Innenluftzusammensetzung-eines-AG%B4s&highlight=zusammensetzung

H2S: 1,2 ppm
O2: 20,3%
CH4: 0,1%
CO2: 1,01%

H2S: 1,3 ppm
O2: 20,1%
CH4: 0,2%
CO2: 1,22%

H2S and CH4 are close to the sensitivity limit of the probe, O2 is close to atmospheric conditions, but Co2 is significantly higher (1% inside the fruit vs. 0.04% in the atmosphere)

7/21/2015 4:21:37 PM

50 Acres

I agree with Alex B.

7/21/2015 4:40:55 PM

Germany

But the analysis has shown: It´s the burps, not the farts (too much O2, too little H2S and CH4 for the farts theory)

7/21/2015 4:54:10 PM

San Diego

Haha...Thanks.

So if you don't what BES, don't use soda cans as a size reference.

7/21/2015 8:21:30 PM

50 Acres

:>)

7/21/2015 10:03:33 PM