Re: Flow rates
- To: <pumpkins@mallorn.com>
- Subject: Re: Flow rates
- From: "* J* N* <c*@execpc.com>
- Date: Thu, 22 Jan 1998 07:31:54 -0600
I've never heard of them being used, but that doesn't mean they wouldn't
work. Sounds like an interesting way to indirectly measure the flow rate
in the vines. One thing that may skew your resuls though, is that an
overwhelming amount of the water flowing through a vine from the roots will
end up being evapotranspirated through the leaves. Depending upon
conditions, 85% or more wouldn't suprise me.
Keep us posted if you come up with some numbers,
Rick
----------
> From: Stewart Deans <sdeans@pcug.org.au>
> To: pumpkins@mallorn.com
> Subject: Flow rates
> Date: Thursday, January 22, 1998 3:57 AM
>
> G'day gang,
> I was thinking that all the nutrients that go into the pumpkin have to
flow
> along the thin pipe that feeds the fruit. At the moment my fruit are
putting
> on about 15 kg a day through a vine of about 2-3 cm in diameter, that is
a
> cross-sectional area of about 7 sq cm. Assuming the liquid weighs about
1kg
> per litre then we have a flow rate of 15 liters per 24 hrs through 7 sq
cms.
> That means about 100 ml per hour per sq cm of cross-section (and faster
at
> night). This should be measurable along the lines that blood flow is
> measured. We have a conductor (the liquid) and by creating a magnetic
field
> you would generate an electric field, the strength of which would
indicate
> the flow rate.
> By clamping sensors based on this principle around various vines you
could
> determine where the nutrients were going. It should be easier in a well
> trimmed Christmas Tree vine.
> Does anyone know if such sensors are used in plant science?
> Stewart ACT Aust
> sdeans@pcug.org.au
>
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