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Fungi

To the farmer – utilisation of fungi (mycorrhiza association)

In the sustainable greenhouse model mycorrhiza of the genus Glomus spp. were utilised mixed into the nursery substrata.
The dosage adopted were according to the suggestions of the producer, approximately an amount varying from 10 to 30 kg for every greenhouse (1000 m2).
In the soil and biological context of Fondi Lake farming fields, submitted to even 30 years long intensive exploitation cycles, the utilisation of formulations of spores of mycorrhiza inoculations will bring to sure benefit both in terms of bio-fertility revitalisation and thanks to the huge organic matter (mycelium) that will be produced during the crop cycles, estimated by different authors around 1-1.2 ton per hectare.

Mycorrhiza (from the ancient Greek words for mushroom and root) are structures formed by the symbiotic union between fungi of the soil and young roots of the plants. Mycorrhiza formation enables the plant to increase water absorption and to develop more resistance against root pathogens. This added effect enables a better growth of the inoculated plants. Mycorrhiza could reproduce themselves only when they get a symbiosis with plants. The mycorrhiza effect consists basically of an enormous multiplication of the root surface and volume (till to 600-700% more than a non mychorrized root). The results obtainable thanks to this symbiosis are:
- increase of the adsorption ability of water, macro- and micro-elements (specially phosphorus, zinc, iron, manganese, etc.); as concerning phosphorus, the availability to the plant is particularly strong during the cold season;
- more resistance to drought;
- a fair effect as “mechanic obstacle” against pathogenic fungi and nematodes;
- decrease of transplantation crisis.

Mycorrhiza effects are not immediate, the first significant growth differences could be noticed 20-30 days after the inoculation, therefore the mycorrhization of those crops demanding particular short farming cycles (e.g. lettuce) is not useful.
The bio-protection effect of the root apparatus concerns only some kinds of root pathogens and nematodes.
The mycorrhiza inoculation is particularly interesting in those soils or substrates where there aren’t naturally present symbiotic mycorrhiza (e.g. fumigated soils, various substrates for nurseries).

 


 

 

 

 

Defros- ting

Soil  tillage

Water, nitrogen