|
Some of these posts are very old and might contain outdated information. You may wish to search for newer posts instead.
|
PsilocyBen17
Pin Pornographer


Registered: 10/20/13
Posts: 3,751
Last seen: 1 year, 1 month
|
How much spawn is too much?
#23352885 - 06/16/16 10:44 PM (7 years, 7 months ago) |
|
|
Been thinking a bit about diminishing regarding spawn rate on my oyster logs....
currently I'm using 4 quarts of spawn per log. logs are 3.5'' by 9'' diameter....not sure of dry/wet weight but I'll see if I can weigh some tomorrow.
Do you think thats a little on the high end? I'm going to be doing some comparisons so I can figure out yield vs spawn rate, but it would be nice to get some input from you guys to speed the process up a little.
|
weetsie
unlicensed tub surgeon



Registered: 05/08/11
Posts: 572
Loc: United Kingdom
|
|
When I only have a small amount of spawn and I'm feeling impatient I will spawn some of it at 1% and so far I've not had an issue other than maybe slow colonization. I think 2-5% is sensible for oysters.
At 2% 4 quarts would make 200lbs of wet substrate.
-------------------- Active grow logs: Oysters on Straw Pellets Trade list
|
TravelAgency
The ongoing "wow"


Registered: 12/25/10
Posts: 4,431
Last seen: 11 months, 23 days
|
Re: How much spawn is too much? [Re: weetsie]
#23353324 - 06/17/16 01:18 AM (7 years, 7 months ago) |
|
|
There's really never a reason to go to 2% spawn ratio- not when you can grain to grain (g2g) and take one wedge as far as 37 qts easy. The colonization time would be too big of a window for contaminants to get in, and your yield will be lower even if you reach full colonization. If you only have 2% grain find something you can use as spawn to expand it before going to substrate.
To Ben: I am just now using hardwood for the first time and supplementing for the first time- but from my experience with pine- I could use one qt spawn to colonize 2 5lbs bags- but after experimenting found that using 1 qt per 5lbs colonized much more quickly and had next to no contams- and the yield of the single block from 1qt was greater than the yield from the 2 half qt 5lbs bags put together. I don't have the documentation to back this up (I'm about to change all that) but I'd say stick to around that ratio from my experience.
|
PsilocyBen17
Pin Pornographer


Registered: 10/20/13
Posts: 3,751
Last seen: 1 year, 1 month
|
|
whatt? how does 1qt colonize 5lbs of sub quicker than 2.5lbs of sub?
|
weetsie
unlicensed tub surgeon



Registered: 05/08/11
Posts: 572
Loc: United Kingdom
|
|
Quote:
TravelAgency said: There's really never a reason to go to 2% spawn ratio- not when you can grain to grain (g2g) and take one wedge as far as 37 qts easy. The colonization time would be too big of a window for contaminants to get in, and your yield will be lower even if you reach full colonization. If you only have 2% grain find something you can use as spawn to expand it before going to substrate.
Ive seen the 2-5% figure quoted in tons of papers on oysters, pretty sure most large commercial operations are using ratios within this range. Reaching full colonization in a couple of weeks with 2% spawn is definitely possible with pink and yellow oysters, no reason why contams should be a problem. That said, I'm not trying to say 2% is the way to go or anything, just that it's the lower limit I typically see quoted and is definitely viable, though maybe not optimum. Given grain is often 20x the price of bulk substrate its a good reason to use it sparingly. I have 33qts of pink oyster spawn that should finish in a few days and the plan is to spawn it at 5% to straw.
Using 20% spawn is daft IMO, leave that to the cube growers.
-------------------- Active grow logs: Oysters on Straw Pellets Trade list
|
TravelAgency
The ongoing "wow"


Registered: 12/25/10
Posts: 4,431
Last seen: 11 months, 23 days
|
|
Quote:
PsilocyBen17 said: whatt? how does 1qt colonize 5lbs of sub quicker than 2.5lbs of sub?
Pardon but I think you misunderstood (or I misspoke) - .5 qt to 5lbs sawdust + .5 qt to 5lbs sawdust = IME much slower colonization, more prone to contaminants, and less yield than the 1 qt to 5lbs sawdust.
Once again this is only in my limited experience.
|
HericiumHeadGuy
Stranger

Registered: 01/18/16
Posts: 8
Last seen: 7 years, 6 months
|
|
I like high ratio but had play around a bit. With a high quality supplemented sustrate i can get away with low ratio With pasteurised or ph adjusted low quality substrate, not so much. I also see grain spawn as a great food source for shrooms that help keep growth strong so i dont wish to lowering it too much. My lower ratio for oyster is 2.5% or 25g spawn to 1000g dry substrate
|
PsilocyBen17
Pin Pornographer


Registered: 10/20/13
Posts: 3,751
Last seen: 1 year, 1 month
|
|
Quote:
TravelAgency said:
Quote:
PsilocyBen17 said: whatt? how does 1qt colonize 5lbs of sub quicker than 2.5lbs of sub?
Pardon but I think you misunderstood (or I misspoke) - .5 qt to 5lbs sawdust + .5 qt to 5lbs sawdust = IME much slower colonization, more prone to contaminants, and less yield than the 1 qt to 5lbs sawdust.
Once again this is only in my limited experience.
ohhh i see the confusion now. thx man
|
micelio
Song of Silence


Registered: 04/22/14
Posts: 1,547
|
|
|
|