Home | Community | Message Board


Azarius
Please support our sponsors.

Mushrooms, Mycology and Psychedelics >> Mushroom Cultivation

Welcome to the Shroomery Message Board! You are experiencing a small sample of what the site has to offer. Please login or register to post messages and view our exclusive members-only content. You'll gain access to additional forums, file attachments, board customizations, encrypted private messages, and much more!

Amazon Shop for: Calcium Carbonate, Peat, Scales, pH Test Strips

Jump to first unread post. Pages: 1
Invisiblee7c
xyz
Registered: 04/29/03
Posts: 93
dolomite lime vs. hydrated lime
    #1575368 - 05/24/03 11:49 PM (13 years, 6 months ago)

my dog is looking to put together a 50/50+ casing and he had me pick up some lime. I accidentally grabbed dolomite lime rather than hydrated lime, as specified in the recipe.
Will dolomite lime work better or worse than hydrated lime? Is there a chance of the lime burning the myc and stunting growth? Should I advise the dog to err on the low side when adding the lime?

Thanks



Post Extras: Print Post  Remind Me! Notify Moderator
Offlinefugu
Pooh-Bah

Registered: 01/06/03
Posts: 2,223
Loc: istanbul
Last seen: 6 years, 5 months
Re: dolomite lime vs. hydrated lime [Re: e7c]
    #1575383 - 05/25/03 12:00 AM (13 years, 6 months ago)

Can I use hydrated lime in my casing mixture?

--------------------------------------------------------------------------------

You can, but you have to be very carefull how much you add.
In theory one should add 2/3 hydrated lime compared to the amount of limestone(calcium carbonate)needed.
The problem is that you have to add exactly the right amount if you use hydrated lime. If you add too much, the pH will go towards 13.
If you use limestone, the pH can't go above 8, despite the amount used.
To prevent this make sure to measure the pH of the casing material, it shouldn't go over 8.


--------------------
mushroom culture history making ...Mr. Allan is the best .....


Post Extras: Print Post  Remind Me! Notify Moderator
Offlinefugu
Pooh-Bah

Registered: 01/06/03
Posts: 2,223
Loc: istanbul
Last seen: 6 years, 5 months
Re: dolomite lime vs. hydrated lime [Re: fugu]
    #1575390 - 05/25/03 12:03 AM (13 years, 6 months ago)

Casing material pH & why it is important

--------------------------------------------------------------------------------

"pH", is a measure to describe the acidity of a medium.
pH 7 is neutral; higher means alkaline, lower acidic.

Peat is a major constituent of preferred casing mixes. The pH of peat is variable, dependent on the source it came from. Meaning, the pH of peat differs from various sources.
The preferred pH range of a casing mixture is 6.5 to 8. 7.5 is optimal.
Peat is acidic. Consequently, to achieve an optimal pH range of a casing mix, the pH of the casing mixture must be adjusted accordingly (within the range of 6.5 to 8).
The pH of the casing must be within certain limits to support strong mycelial growth. An overly acidic or alkaline casing mixture will depress mycelial growth and supports unwanted competitors.
It is generally easier to make casing materials more alkaline (i.e., increasing the pH) than it is to make them more acid (i.e., reducing the pH).
A movement of 0.5 is easy but, because the pH scale is logarithmic, a movement on the order of, 2.0 points becomes more difficult because there is a factor of 10x between each full point, so pH 5.0 is actually 100 times more acid than pH 7.0.

There are several common types of lime available for use, though care should be exercised with all of the products. Lime is caustic and a skin and eye irritant and can be dangerous if misused. If you choose to use such products, carefully read and follow all manufacturer directions exactly. The major types of lime products include:
Hydrated Lime: fast acting, but not long lasting. It is very effective to produce a fast change in pH level. It is also the "strongest" form of lime generally available, and you must follow all manufacturer precautions, since your skin and eyes can be easily irritated or burned if the product is misused.

Ground Limestone: a naturally occurring type of limestone that has been ground to a fine powder. How quickly it will act to modify pH and how long it will persist depends on how finely it was ground.

Generally, ground limestone is weaker than hydrated lime, needing about 30% more to raise the pH by the same amount. It has the advantage, however, of usually being significantly cheaper than the hydrated lime, and usually works more slowly and lasts much longer.

Mixed Lime: usually sold under a brand name. Most brands contain a variety of particle sizes to provide some immediate benefits, as well as a longer persistence. (this is often referred to as "time released" lime).

pH gradually falls to less than optimal by the end of cropping due to acids secreted by the mushroom mycelium. Consequently, a long lasting buffering agent is preferable.

If you wish to achieve optimal results when adjusting pH, it is highly advisable to use litmus strips (with color chart), or acquire a pH test probe (available at most garden supply stores, under $20) to accurately test, and adjust the pH of your casing mix, prior to application.

Doing all other cultivation steps properly, then applying a casing mixture outside the proper pH range, most often creates poor cropping results.


by SixTango


--------------------
mushroom culture history making ...Mr. Allan is the best .....


Post Extras: Print Post  Remind Me! Notify Moderator
Jump to top. Pages: 1

Amazon Shop for: Calcium Carbonate, Peat, Scales, pH Test Strips

Mushrooms, Mycology and Psychedelics >> Mushroom Cultivation

Similar ThreadsPosterViewsRepliesLast post
* agricultural lime vs hydrated lime *important!*
( 1 2 all )
angryshroom 3,648 24 01/29/02 05:21 PM
by Anno
* horticultural hydrated lime VS. agricultural limestone in 50/50+ tek??? trentallica 3,002 3 05/29/06 07:07 PM
by RogerRabbit
* Agricultural vs Horticultural vs hydrated lime faceyneck 1,966 5 06/07/07 01:41 PM
by Anno
* 50/50 (no buffer) vs 50/50+ with dolomitic lime prayformojo 1,048 8 04/29/08 05:30 PM
by koopa_troopa
* Magnesium, dolomite lime and casings.. a definitive answer needed. discman1 2,201 5 11/05/04 12:14 AM
by discman1
* pasteurize +/- dolomitic lime all_together_now 1,637 4 02/11/07 01:29 AM
by Blutjager
* hydrated lime vs baking soda? liamtheloser 2,475 7 07/14/06 02:26 AM
by fastfred
* dolomitic lime nonlinear 1,058 4 06/02/08 03:25 PM
by RogerRabbit

Extra information
You cannot start new topics / You cannot reply to topics
HTML is disabled / BBCode is enabled
Moderator: Magash, Shroomism, george castanza, Prisoner#1, RogerRabbit, Citric, total, FooMan, 13shrooms, stonesun, EvilMushroom666, cronicr, PussyFart
3,702 topic views. 14 members, 83 guests and 29 web crawlers are browsing this forum.
[ Toggle Favorite | Print Topic | Stats ]
Search this thread:
Everything Mushrooms
Please support our sponsors.

Copyright 1997-2016 Mind Media. Some rights reserved.

Generated in 0.024 seconds spending 0.006 seconds on 14 queries.