Re: [compost_tea] Effects of microbes on leaf surfaces

From: <soilfoodweb_at_aol.com>
Date: Sun, 23 Nov 2003 20:59:30 -0500

We've done LICOR readings of respiration on leaf surfaces, as well as plant tissue analysis of various nutrients. The coverage of the leaf surface with the microbes (at least 5% needs to be fungal coverage in order to deal with something like mildew in the work we have been doing on the SARE grant).

There was no difference in chlorophyll concentration, or sugar produced in short term experiments with organism coverage, or without organism coverage.

There was a significant increase in CO2 evolved on leaves with the biology present on the surface. This resulted in a greater time that stomates were open, and the length of time that stomates were open. Iron, N, and potentially other micronutrients were in higher concentration in the leaves with organisms on the surface.

This needs to be repeated of course. We have the results from one replication of this work, but don't have the money or time to do more.

SFI could contribute these initial data if someone was interested in writing a grant to fully fund the work.

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 Sun Nov 23 2003 - 21:29:00 EST

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