Aquaponics Digest - Fri 01/14/00
Message 1: Re: New varieties for Y2K
from Adriana Gutierrez & Dennis LaGatta
Message 2: Has anyone tried Azolla ( mosquito plant)
from "KevinLReed"
Message 3: Re: trout and lettuce
from Ronald Polka
Message 4: Strawberries
from "Jay Myers"
Message 5: fish food - tilapia
from "D.Bennett"
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| Message 1 |
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Subject: Re: New varieties for Y2K
From:Adriana Gutierrez & Dennis LaGatta
Date:Fri, 14 Jan 2000 02:58:13 -0500
Here's the whole enchilada :>)...Just about any salad greens will do
well.As to Mexican - you can grow cilantro, epazote, tomatoes and
peppers (green, red, rainbow and jalapeņo).How's that for starters?
> I'd like to know the names and varieties of salad greens, etc. that grow
> well in in these aquaponic and are particularly good in all kinds of Mexican
> cooking.
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| Message 2 |
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Subject: Has anyone tried Azolla ( mosquito plant)
From:"KevinLReed"
Date:Thu, 13 Jan 2000 22:00:18 +0200
Has anyone tried Azolla as a fish feed?
Aloha,
Kevin
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Subject: Re: trout and lettuce
From:Ronald Polka
Date:Fri, 14 Jan 2000 14:58:28 -0700
At 04:35 PM 1/13/2000 -0500, you wrote:
>>>>
Wow that was a fast reply...Thanks Barry,
I'm at the beginning stage of setting up a small scale trout
and lettuce experimental lab up here in Quebec. The system is a raft one
using0.3 square feet of growing area per gallon of fish water ( I
actually am goingby the amount of feed put in to the system w/r to
growing space ). I'm at theviscous circle stage trying to get things
started, I 'm hoping to be able toremove my biofilter once the plant
roots are established. Getting back to theoriginal question; I'm slowly
increasing the nutrient content of the system withhydroponic liquid
fertilizers to have enough for the plants which , onceestablished can
then help with the biofiltration .( Am I wrong in doing so, Iread that
small leafy plants need an EC of 400 to start and ~2000 onceestablished
).
Marc
You are on the right track in relating fish food input to hydroponic
system load sizing. The amount of feed used will determine the nutrient
input to the plants. Achieving waste production/nutrient uptake
equilibrium is a delicate balancing act. For a rather detailed study of
the relationship between tilapia biomass and growth to lettuce growth and
nutrient uptake try to get a copy of the following paper. Nutrient
Dynamics in Integrated Aquaculture-Hydroponics Systems, by Damon E.
Seawright, Robert R. Stickney, Richard B. Walker. Aquaculture, Jan 30
1998, vol 160, pp215-237. Publ by Elsevier, Amsterdam, Netherlands.
Accession # IND21977719, Nal Call # SH1.A6, ISSN 0044-8486. This study
looked at nutrient dynamics for individual macro and micronutrients in a
closed recirculating system. You may be able to obtain a copy of this
through interlibrary loan. If not contact me off list. Good luck with
your endeavors.
Ron Polka
Southwest Technology Development Institute
New Mexico State University
Box 30001, Dept 3SOL
Las Cruces, NM88003
rpolka@nmsu.edu
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Subject: Strawberries
From:"Jay Myers"
Date:Fri, 14 Jan 2000 19:30:00 -0600
Just wanted you to know we open for U-pick business saturday morning.Hang
on to your hat.Lots of berries ready, and more coming along.Fish are all
well too.
Jay
Panama City Beach, Fl.
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| Message 5 |
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Subject: fish food - tilapia
From:"D.Bennett"
Date:Fri, 14 Jan 2000 20:24:26 -0500
Exactly what do tilapia ordinarily eat?I don't mean pre-mixed, purchased
feeds.I mean, what would they eat if living wild? And/or, what's in the
pre-mixed, purchased fish feed?
>You are on the right track in relating fish food input to hydroponic system
load sizing. The amount of feed >used will determine the nutrient input to
the plants. Achieving waste production/nutrient uptake equilibrium >is a
delicate balancing act. For a rather detailed study of the relationship
between tilapia
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