Purpose of the product
The product called „Mycorrhiza inoculum“ is a soil
substrate containing fungal propagules which enter into a symbiosis between
cultivated plants and arbuscular mycorrhizal fungi (AMF).
Characterization
of content
(AMF species, strain
and charge)
The inoculum production charge: IFP xx (Institut
für Pflanzenkultur) contains arbuscular mycorrhizal fungi of Glomus
spp.
Possible pathogenity of the substrate
In addition to the arbuscular mycorrhizal fungi,
the inoculum contains other naturally occurring fungi and bacteria of
the rhizosphere, some of which are necessary for the germination of the
mycorrhizal fungi. In different bioassays (germination test, pathogenity
test) no negative effects on test plants were observed.
Effectiveness of the inoculum in a standard
test
A mycorrhization of the test plant Phaseolus
vulgaris cv. Saxa of at least 48 % of the roots and a mycorrhiza
efficiency index according to Bagyaraj (1994) of 25 (2 repetitions, n=15)
were found after 21 days of culture under standard conditions (15°C/21°C;
6 ppm P in soil solution, pH 5,3; light 500 µmol x m-2 x s-1
for 12 h/d; 500 ml pot volume; inoculation after homogenous mixture of
inoculum and substrate) when the inoculum had been diluted 1:10 with a
peat substrate.
Maximum dilution of the inoculum containing
soil
The inoculum
should be diluted to at least 1:10 and to a maximum of 1:50 to assure
effectiveness. Less dilution can lead to decreased growth of poorly fertilized
plants. A higher dilution delays the incubation period required for effects
of mycorrhization to become visible.
Storage and expiration of the inoculum
Whereas the inoculum retains its full potential for
colonization after one year of storage, older inoculum remains viable
for up to five years. Since the potential for colonization of older inoculum
may be reduced, the dilutation should also be reduced. Open packages should
not be stored . Storage should be under cool and dry conditions.
Contact
Institute for Plant Culture, Dr. Carolin
Grotkass, Solkau 2, 29465 Schnega, Germany
Tel.: +49 (0) 5842-472, Fax: +49 (0) 5842-493, [email protected],
http://www.mykorrhiza.de
|