Alexander Tsarev
Mushroom industry

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Humidity Content

The humidity indicator of the casing layer can range from 70% to 80% (it depends on the mushroom growers and different growing methods).

At preparing the casing layer a few important aspects should be taken into account. They are the following:

  • First of all, it’s necessary to select the composition (formula) of the mixture. The composition is chosen separately for each batch of the imported raw materials – high-moor and valley peat, the amount of lime is calculated according to the required pH level = 7.2 – 7.5.

  • A high moisture capacity is very important for the casing mixture, therefore, it’s necessary to maintain it, as much as possible, while processing and mixing it.

  • The casing layer should contain a reasonable amount of moisture. Moistened casing mixture quickly absorbs a greater amount of water than when it’s dry. Moreover, in a casing layer that is overly friable and not moist enough, the mycelium grows in many thin hyphae. Later on, that makes it more difficult for the water to enter into the casing layer that has been overly grown with mycelium.

  • The casing mixture that is too moist is difficult to apply. This mixture forms a dense and heavy layer, looses its structure, and therefore, its air permeability. This makes it impossible for the mycelium to grow well in the casing layer.

  • At preparing the casing mixture by hand, we recommend to first mix the materials while they’re dry and then bring the mixture to an optimal humidity level while actively mixing it.

  • Special attention should be paid to sanitation and hygiene in the preparation and application of the casing layer process and any possibility of pathogenic microorganisms getting into the layer must be excluded.

Comments

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Dear Amir Ommati!
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