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Registered: 12/08/02
Posts: 619
50/50+ casing tek - Oyster shell AND lime?
    #3114271 - 09/09/04 05:09 PM (13 years, 2 months ago)

Hrm, I thought these were both just calcium carbonate? Is the oyster shell just a texture thing? If I go without oyster shell, how much more limestone should I use? Please no recommendations on casing mix as I already have all the stuff except oyster shell. Thanks.

Edit: I wasn't specific enough. I meant limestone, not actual lime.

Edited by Ayrios (09/09/04 05:36 PM)

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Re: 50/50+ casing tek - Oyster shell AND lime? [Re: Ayrios]
    #3116771 - 09/10/04 01:48 AM (13 years, 2 months ago)

If you aren't adjusting to a certain pH you are just guessing. Put in however much makes you feel good. You can't really screw this up.

Here is something that might help. The text is a bit munged and edited...

calcium carbonate (CaCO3)

This study demonstrated that substrates containing
up to 0.6% precipitated calcium carbonate were more
productive than substrates containing no additional
calcium. Further study is needed to determine the effects
of other forms and concentrations of calcium on
mushroom yield and BE.

It is known that CaCO3 has a profound
effect on pH, while CaSO4 has no or only minimal effect
on substrate pH.

We have found that the addition of CaSO4 (various
levels up to 2% of the dry weight) to the same medium
reported here did not affect yield or mushroom size (D.J.
Royse and J.E. Sanchez, unpublished).

0.4-0.6% precipitated CaCO3 is optimal.

The stimulatory effect of
CaCO3 for mushroom yield, therefore, may be related to
the various gradients and stimuli created at the hyphal
tips that ultimately influence growth and development of
the mushroom.

Source: Influence of precipitated calcium carbonate (CaCO3)
on shiitake (Lentinula edodes) yield and mushroom size
Daniel J. Royse a,*, Jose E. Sanchez-Vazquez

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Mushrooms, Mycology and Psychedelics >> Mushroom Cultivation

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