Re: [compost_tea] Re: Holding time for tea

From: Robert Norsen <bnbrew_at_yahoo.com>
Date: Mon, 28 Apr 2003 11:11:35 -0700 (PDT)

Hi GW. In my experience, if your tea is active and you add significant amounts of fish or kelp the tea will become anaerobic within 15 minutes. Like O2= < 2 . Question - is foliar feeding of fish and kelp that has not been assimulated by the microbes really effective as a way to better growth or production? It seems to me that is like feeding the root system nutrients without the benefits of microbes. Is there good evidence that it works? Bob

growest2002 <g.w.thomson_at_shaw.ca> wrote:Maybe this is already clear to everyone else, but I'm still uncertain
about adding foliar nutrients to a tea that is going to be
immediately
sprayed out.

I would like to combine fish and kelp foliar feeding with the tea
being applied. If I add fish at 1:100 in the tank, and kelp at
1:200,
will the oxygen demand kill off a significant amount of my tea in the
30-60 minutes it takes me to expel that tea from my sprayer?

A possible factor is that lately I've gone to spraying straight tea
(other than a small % of water used to dilute the yucca that is added
to the tea in the spray tank). Thus I have a very "concentrated"
bunch
of organisms in that spray tank, ready to consume the fish/kelp when
it's added...

It sure would be nice if we could eliminate the extra trip around to
foliar the nutrients separately from the tea, but not if the tea gets
murdered in the process--Glen

--- In compost_tea_at_yahoogroups.com, soilfoodweb_at_a... wrote:
> I have been asked, off the list serve, to comment on how long you
can hold tea.
>
> IF you make sure that oxygen is maintained in aerobic ranges, you
CAN hold tea for up to 5 days.
>
> BUT please recognize that during that time, you very well may
select
for an ever-diminishing set of organism diversity. The reason for
the 5 day cut-off is that by that time, you are deal with a limited
set of microbe diversity.
>
> If you add any foods into that "being-held" tea, oxygen will
PLUMMET
to very low levels. You have bunch of activated, starving bacteria
and fungi in your 2 to 3 day old tea, and they will be SAVAGE about
any added food, using it very rapidly, and with a huge oxygen demand.
Ask Bob of Bob's Brewers about his experience with this! The oxygen
demand can be so extreme that it will result in loss of the
beneficial
fungi, protozoa and nematodes from the brew quite rapidly. Within 4
to 6 hours.
>
> So, if circumstances force you to hold tea, do it with caution, add
only minimal amounts of food (no more than a teaspoon or 20 ml, for
example) after 24 hours. It can be done, but with extreme care.
>
> If you tank mix nutrients into your tea, you have the same
situation, so remember that you have only a few hours - perhaps only
4
to 6 hours - to get the tea out before the beneficial fungi have been
consumed.
>
> Of course, once your organisms have gone flying through the air in
droplets, the aeration problem has been alleviated. The thin layer
of
tea on a leaf surface will be nicely aerobic. Diffusion is quite
adequate on the leaf surface.
>
> The test to determine whether aeration was adequate is to PUT THE
TEA INTO A SEALED CONTAINER AND LEAVE AT ROOM TEMPERATURE OVERNIGHT.
Open the container and smell at 24 hours. If ok, your tea was likely
ok. IF stink can be detected, do another tea.
>
> Compost tea is meant to be made, and applied right away. There is
no point in holding it, as you start to lose diversity after 48 to 72
hours. Hold it only if you have no choice. With proper maintenance,
tea can be held up to 5 days. But then, apply it someplace that you
don't care if the results are a bit funky. I personally let the weed
patch have it. You are helping diversity in the soil, which will
ultimately will select against the weeds.
>
> OK?
>
> Elaine Ingham
> President, Soil Foodweb Inc.
> SFI Corvallis, OR
> SFI Port Jefferson, NY
> SFI Lismore, NSW, Australia
> SFI Hilversum, The Netherlands
> SFI Cambridge, New Zealand
> www.soilfoodweb.com


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Received on Mon Apr 28 2003 - 14:52:10 EDT

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