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Siam Mushroom
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Registered: 06/10/15
Posts: 10
Last seen: 8 years, 3 days
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Oyster mushroom questions
#22113693 - 08/19/15 07:21 PM (8 years, 5 months ago) |
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Hello board members my name is Frank and im trying to setup a mushroom farm in Thailand.
Im running now my first grow in a room of 4 by 13 meters cooled down to 20 degrees celcius. I instald in this room automatic fresh air suply and a humidefier controlled by a humidity meter. The ppm co2 running from 300 to 500 and the humidety from 85 to 99. There is a airflow in the room of 2400 cfm from the ac flow in ducts. The room is filled up with 13000 bags of sawdust contains 900 gram wet substratr each bag. Now there are plent of oysters showing a shape shown in the picture below. Im trying to find the problem but till now i really dont know. What do you guys think?
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drake89
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Registered: 06/26/11
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Loc: TN
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that's just what they look like when they are over-grown. you should harvest them more like what they are in the second photo. The brown oyster does not yeild very well compared to blue in my experience. if you have space, they will flush many times (4+). But blue oysters yeild more on the first and second flush in my experience. if you have climate control you should have no trouble growing them.
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Siam Mushroom
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Re: Oyster mushroom questions [Re: drake89]
#22114161 - 08/19/15 08:57 PM (8 years, 5 months ago) |
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Thanks for your reaction. The problem is that they started curling up already with a cap size of +- 2 cm. They growing really slow also if i compare it with my old rooms on +- 30 degrees. Can this slow growing make this curling problems also?
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drake89
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Registered: 06/26/11
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Quote:
Siam Mushroom said: Thanks for your reaction. The problem is that they started curling up already with a cap size of +- 2 cm. They growing really slow also if i compare it with my old rooms on +- 30 degrees. Can this slow growing make this curling problems also?
no silly, they grow slower because the temperature is lower...
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Jim Morrison
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Registered: 03/20/15
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Re: Oyster mushroom questions [Re: drake89]
#22115890 - 08/20/15 09:26 AM (8 years, 5 months ago) |
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Drake is absolutely right. If it's cooler they grow slower, but they should also be more dense and meaty. If you measure yield in weight, denser is better in my opinion.
-------------------- Jim Morrison's Trade List Live Long and Myceliate! The only power any government has is the power to crack down on criminals. Well, when there aren't enough criminals, one makes them. One declares so many things to be a crime that it becomes impossible for men to live without breaking laws. Ayn Rand
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solarity
mm... my favourite food



Registered: 03/31/09
Posts: 1,590
Loc: UK
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What is the strain? I grow a light brown Pulmonarius that also has a tendency to curl before it is mature - but it is a different appearance to yours. - Though it looks and tastes fantastic!
To me it looks as though it may be too hot for them - what is the temperature range given for the strain?
-------------------- Commercial exotics farmer for 8 years - now sold up!
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mikesethnobotany
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Registered: 07/29/11
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Quote:
Siam Mushroom said: Hello board members my name is Frank and im trying to setup a mushroom farm in Thailand.
Im running now my first grow in a room of 4 by 13 meters cooled down to 20 degrees celcius. I instald in this room automatic fresh air suply and a humidefier controlled by a humidity meter. The ppm co2 running from 300 to 500 and the humidety from 85 to 99. There is a airflow in the room of 2400 cfm from the ac flow in ducts. The room is filled up with 13000 bags of sawdust contains 900 gram wet substratr each bag. Now there are plent of oysters showing a shape shown in the picture below. Im trying to find the problem but till now i really dont know. What do you guys think?

Do you use any supplements or just pure sawdust? How much grain spawn do you use to inoculate the sawdust?
Edited by mikesethnobotany (08/20/15 04:31 PM)
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Siam Mushroom
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Re: Oyster mushroom questions [Re: solarity]
#22117646 - 08/20/15 05:09 PM (8 years, 5 months ago) |
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Its P. Sajor caju im growing here, by far the most popular mushroom in Thailand. They say this oyster is able to grow in hitter places, but grows the best at +- 20 degrees celcius.
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Siam Mushroom
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Registered: 06/10/15
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Quote:
mikesethnobotany said:
Quote:
Siam Mushroom said: Hello board members my name is Frank and im trying to setup a mushroom farm in Thailand.
Im running now my first grow in a room of 4 by 13 meters cooled down to 20 degrees celcius. I instald in this room automatic fresh air suply and a humidefier controlled by a humidity meter. The ppm co2 running from 300 to 500 and the humidety from 85 to 99. There is a airflow in the room of 2400 cfm from the ac flow in ducts. The room is filled up with 13000 bags of sawdust contains 900 gram wet substratr each bag. Now there are plent of oysters showing a shape shown in the picture below. Im trying to find the problem but till now i really dont know. What do you guys think?

Do you use any supplements or just pure sawdust? How much grain spawn do you use to inoculate the sawdust?
Im using some supplements but not much, this because i only have a pasteurization facility. 6% rice bran, 2% gypsum and 2% pumice. The seeds with spawn only places on the top of the bag for infecting and not mixed up with the sawdust. The way to make the bags is copied from the thai people but then in a climate controlled room.
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mikesethnobotany
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Registered: 07/29/11
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Even 6% bran is still a significant amount of supplement for some mushrooms, and this can be extremely true between different strains of the same species (e.g. Shiitake 75 vs. Night Velvet). When shiitake are over-supplemented they tend to grow wonky looking fruits.. Maybe you could try halving that amount of bran supplement on a small batch and see how those turn out?
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Siam Mushroom
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I will try that the next round. But i realy have to find a way that this oysters not curl this fast. It also ofcourse dropping the spores now, the return air filter is full of it.
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drake89
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Registered: 06/26/11
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do you make your own grain spawn?
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Siam Mushroom
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Re: Oyster mushroom questions [Re: drake89]
#22119258 - 08/20/15 10:34 PM (8 years, 5 months ago) |
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Quote:
drake89 said: do you make your own grain spawn?
I dont make my own spawn. The spawn is bought from local supliers.
Edited by Siam Mushroom (08/20/15 10:35 PM)
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drake89
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Registered: 06/26/11
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Quote:
Siam Mushroom said:
Quote:
drake89 said: do you make your own grain spawn?
I dont make my own spawn. The spawn is bought from local supliers.
see if you can get another oyster strain to trial. like I said before, brown oyster was typically the lowest yielding for me. Even at 20C, blue oyster should preform much better. Only problem with your setup is that oysters typically prefer more cellulose:lignin. Sawdust is much higher in lignin than straw or cotton waste. Can you source cotton seed hulls or fibers?
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Siam Mushroom
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Re: Oyster mushroom questions [Re: drake89]
#22120789 - 08/21/15 05:45 AM (8 years, 5 months ago) |
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Thank you agian for replying. Im stuck to this kind of oyster because the thai people just dont know oysters like blue ones. The only other oyster they growing are the pearl white ones, these ones give much higher yields but the price is half of these brown ones and hard to sel. Also in the hotter rooms i never seen this curlling of the caps at this early stage.
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solarity
mm... my favourite food



Registered: 03/31/09
Posts: 1,590
Loc: UK
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Quote:
Also in the hotter rooms i never seen this curlling of the caps at this early stage.
.... so turn off the AC !? At least for a part of the crop see if that improved it.
-------------------- Commercial exotics farmer for 8 years - now sold up!
Edited by solarity (08/21/15 10:58 AM)
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Siam Mushroom
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Re: Oyster mushroom questions [Re: solarity]
#22123615 - 08/21/15 05:32 PM (8 years, 5 months ago) |
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Turning the ac off will be not a good idea. We have outside tempertures of 30 degrees celcius in the night and nearly 40 in the day time. I will try after this flush to raise the temperture inside the room with a few degrees.
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solarity
mm... my favourite food



Registered: 03/31/09
Posts: 1,590
Loc: UK
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Sorry that is what I meant, if you don't see the problem in higher temps then raise the temps. I expect that strain is selected to grow at higher temps - unless everyone is using lots of AC!
-------------------- Commercial exotics farmer for 8 years - now sold up!
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OysterKing
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Wow 13 000 bags would do very nicely.
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