JPH03259016A - Culture medium for culturing mushroom - Google Patents

Abstract

PURPOSE:To stably culture a high quality mushroom in high yield, containing a synthetic aluminosilicate having Al2O3 and SiO2 in a specific ratio. CONSTITUTION:A culture medium for culturing mushrooms containing at least one synthetic aluminosilicate having a molar ratio of Al2O3:SiO2 of 1:(1.4-3) wherein >=45mol% of metal oxide is calcium oxide and/or magnesium oxide.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a culture medium for mushroom cultivation. In particular, the present invention relates to a mushroom cultivation culture medium that can stably cultivate high-quality mushrooms with a high yield.

[Prior art] In recent years, it has become possible to artificially cultivate edible mushrooms such as enoki mushrooms, oyster mushrooms, and nameko mushrooms using a culture medium that is a mixture of base materials such as sawdust and rice hulls with nutrients such as rice bran, wheat bran, and wheat germ. It is widely practiced. However, in this case, it is difficult to obtain high yields of mushrooms of uniform quality, and a solution to this problem has been sought.

As one of the solutions, the present inventor previously mixed an inorganic synthetic material consisting of synthetic aluminum silicate, synthetic magnesium silicate, synthetic hydrotalcite, synthetic zeolite, synthetic dawsonite, synthetic aluminum hydroxide, or pseudoboehmite. He discovered that high yields of high-quality mushrooms could be obtained by using a culture medium and filed a patent application (Japanese Patent Laid-Open Publication No. 34216/1983).

[Contents of the invention] The present inventors have developed a j! for mushroom cultivation containing inorganic materials. #
I continued my research on vF regarding nutrients.

As a result, A1. A synthetic aluminosilicate in which O, and SiO2 are in a specific ratio, and in addition, Na is a common metal oxide in the synthetic aluminosilicate.
The present invention was completed based on the discovery that when a synthetic aluminosilicate in which more than a certain percentage of O is replaced with MgO and/or CaO is mixed into a culture medium for mushroom cultivation, mushrooms of good quality can be obtained at a higher yield. did.

Therefore, the present invention provides a method in which the molar ratio of AIj03:Sin is I:1.4 to 3, and 45 mol% of the metal oxide.
The above is a culture medium for mushroom cultivation characterized by containing at least one kind of synthetic aluminosilicate which is calcium oxide and/or magnesium oxide.

The synthetic aluminosilicate used in the culture medium of the present invention generally has the following compositional formula: % formula % [wherein M is a monovalent or divalent metal, n is 1 or 2,
X is 1.4-3, y is O-8, and M! /, O's 45
Indicated by 1 where mol % or more consists of CaO and/or MgO.

Such a synthetic aluminosilicate can be artificially synthesized by mixing and igniting the component compounds. Specific examples of the synthetic aluminosilicate include, but are not limited to, the following.

In terms of yield and quality of mushrooms, the present invention uses the aluminosilicate in an amount of usually about 0.1 to 1.8%, preferably about 0.3 to 1.8%, based on the weight of the culture medium after adding water.
It is used by mixing it with the culture medium at a ratio of 0.9%. If the amount of aluminosilicate mixed is less than 0.1%, the yield of mushrooms will be low, while if it exceeds 1.8%, the yield of mushrooms will be somewhat high, but only irregular and inferior quality mushrooms will be obtained. In severe cases, it may interfere with the growth of mycelium and the formation of fruiting bodies.

In the present invention, nutrient sources such as rice bran, ground sorghum, and bran are added to base materials such as sawdust, rice husk, corncob, pulp waste, bagasse, beet lees, starch lees, and okara, which are known as culture media for mushroom cultivation. One type or a mixture of two or more types is used as a culture medium. Usually, a mixture of about 0.1 to 1.5 parts by weight of a nutrient source is used with respect to 1 part by weight of the base material. In particular, per 100 parts by weight of sawdust, at least one of rice bran, ground sorghum and bran;
A mixture of about 50-70 parts by weight of seeds is suitable for obtaining high yields. However, depending on the type of mushroom, the cultivation environment and conditions, etc., the type of substrate and nutrient source, the blending ratio of both, etc. can be changed arbitrarily.

Furthermore, in addition to the above-mentioned nutritional sources and substrates, the mushroom cultivation medium of the present invention can also contain components used in mushroom cultivation culture media, for example, as necessary. Examples include calcium carbonate, eggshell powder, shell powder, and slaked lime.

The culture medium for cultivating mushrooms of the present invention is suitable for cultivating edible mushrooms such as Shirotamogitake, Oyster mushroom, and Bunashimeji.

When cultivating mushrooms using the culture medium of the present invention, water is added to the culture medium to bring the water content of the culture medium to about 50%.
After adjusting to ~70% by weight, heating and carbonizing if necessary, and cooling, white seeds are seeded and cultured according to the cultivation, growth method and conditions normally employed for each mushroom.

The present invention will be specifically explained below using examples, but the present invention is not limited by these examples.

Control Example: 300 g of sawdust was mixed with 50 g of rice bran, 25 g of bran, and 25 g of ground sorghum, and this was mixed with 135 m of water (+
In addition, the moisture content is 63I! Fill a polypropylene bottle with a capacity of 850 cc with a culture medium adjusted to 120 cc.
It was autoclaved for 45 minutes at ℃. After cooling, it was inoculated with 118 g of Shirotamogitake mushrooms, cultured and aged at 22 to 23°C for 75 days, and then the bacteria were scraped.

Thereafter, the mushrooms are grown in a cultivation room at a temperature of 15° C. and a humidity of 95 to 100%, and 21 to 23 days later, the Shirotamogitake mushrooms are harvested and dumped.

Examples 1 to 4 and Comparative Examples 1 to 4 In the above comparative examples, when mixing sawdust, rice bran, bran, and sorghum pulverized products (except for mixing 3 g of each of the inorganic materials shown in the table below) In all cases, Shirotamogitake mushrooms were strained and cultivated in the same manner as in the control example.

The results obtained in the above Control Examples, Examples i-4 and Comparative Examples 1-4 are shown in Table 1 below.

However, in the above batter, the quality of the mushrooms was determined as follows.

[Judgment of mushroom quality] Excellent: Mushrooms are uniform in size and have a polycomb feel overall.

Good: Some small mushrooms are mixed in, and it lacks a sense of volume.

Acceptable: Mushrooms are generally a little small and few in number, lacking a sense of volume.

From the results in the table above, ^1.0. : The molar ratio of SiJ is 1. +1.4 to 3, and metal oxide (M)
When using the culture medium of the present invention mixed with aluminosilicate in which not less than 45 mol% of calcium oxide (Cab) or magnesium oxide (MgO) is used; I understand that.

Procedural amendment Heisei 2

Claims (1)

[Claims] The molar ratio of Al_2O_3:SiO_2 is 1:1.4 to 3
A culture medium for mushroom cultivation, characterized in that it contains at least one synthetic aluminosilicate in which 45 mol% or more of the metal oxide is calcium oxide and/or magnesium oxide.