Alexander Tsarev
Mushroom industry


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Phosphor gypsum
Its hard to overestimate the role gypsum plays in the compost preparation process. Even though its used in relatively small amounts about 60 kg for a ton of compost, gypsum plays a decision role in the formation of the composts structure and pH level. The pH level, in turn, determines the content of nitrogen in the compost. Its a very important indicator for the nutrition of mushroom mycelium. The point is that the mushroom mycelium assimilates organic nitrogen, and can eat up the ammoniac one. But when the pH level is high, the ammoniac nitrogen can turn into free, gaseous ammonia which is a poison to mushroom mycelium. One of the most important indicators of compost is a complete absence of the ammonia odor. Its best to use ordinary construction gypsum. Phosphor gypsum can be used, but its necessary to increase the amount of it applied. 40 kg of phosphor gypsum have to be applied to a ton of compost. Usually, the exact amount gypsum to be applied is determined by the quality of the raw materials.

Gypsum (packaged and not) has to be stored in a closed, dry room, so it stays dry and friable. The moisture of the gypsum mustnt exceed 20%. And like any other supplement, gypsum has to be uniformly applied and distributed in the mass of compost.


Retaining Mushroom Whiteness

Shafaquath ali, Bengaluru:

My button mushroom although looks white initially, soon in a days time becomes Brown. How to retain...

Mushroom in basement (first part)


what is the influence of NH4 in composting.

Mushroom in basement (first part)


what is the importance of NH4 in spawn run compost. what is the ranage better for good spawn run.

watering first flush mushrooms

Anwer Zaib Karachi Pakistan:

Dear Everybody

How are you
I am Anwer Zaib from Karachi Pakistan
I am interested in Button...

watering first flush mushrooms

ahmet turkey:

watering first flush mushrooms

Ahmet T?RK?YE:


watering first flush mushrooms

shankar khandelwal, sonipat,haryana,indi:



Dear Shahnaz!
If I understand correctly, you have problems in switching from vegetative growth of...

Suhail, Riyadh:

I am trying to build a very small scale white button mushroom farm running on imported Phase 3 compost...

Mushrooms in Kazahstan

Fred Siewert - Almaty:

I am intrested in your mushroom production and would like further contact.I am an interpreneur with my...

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