JP2639828B2 - Mushroom cultivation bag - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a mushroom cultivation bag for efficiently cultivating mushrooms such as maitake mushrooms, shiitake mushrooms, namebushi mushrooms, nameko and shimeji as sawdust.

[Conventional technology]

Conventionally, when cultivating mushrooms such as shiitake mushrooms,
A seed piece in which mushroom fungi had sufficiently propagated was implanted in the hardwood of a broad-leaved tree such as nara, and mushrooms were bred to stimulate the mushrooms.

On the other hand, sawwood is recently lacking, and the wood itself is dense enough that it takes time to propagate mushroom fungi before it can generate mushrooms. First, the method of using this as a cultivation material is gradually being widely used. This method is preferable because the mycelium is circulated in a shorter time, and it is not necessary to obtain thick broadleaf trees forcibly because of using sawdust.

[Technical problem to be solved by the invention]

However, the method of using sawdust as a cultivation material tends to be contaminated by various germs, and mushroom fungi are generally weak bacteria. It cannot be harvested. On the other hand, the growth of mushrooms requires a sufficient supply of carbon dioxide gas and cannot be completely sealed.

Further, it was found that ethylene and other harmful gases were generated in trace amounts during the cultivation. Even a very small amount of these gases has an adverse effect on the growth of mushroom fungi, and there has been a demand for a method of positively eliminating these gases.
There is also a method of enclosing and sealing the oxygen absorbent, ethylene absorbent, odor component absorbent, etc., but it is necessary to completely separate these chemicals from the contents and enclose them, which makes the work complicated. Nevertheless, it could not be widely dispersed and sealed in the bag, and the effect was local.

Therefore, there is a need for a mushroom cultivation bag that allows free passage of oxygen and carbon dioxide gas, does not allow microorganisms to pass through, and has the same effect as that of enclosing a malignant gas absorbent without enclosing it. I was

[Means for solving the problem]

An object of the present invention is to solve the above-mentioned problems, and the configuration thereof is a bag formed by mixing a fine powder of a harmful gas absorbent with a thermoplastic plastic and manufacturing a film by fusing the periphery except one of the bags. An opening is provided in a part of the film, and the opening is covered with a filter having fine pores that do not allow fine particles having a diameter of 0.01 μ or more to pass therethrough.

The bag material used in the present invention is preferably a film capable of sealing contents such as polyethylene and polypropylene and heat-sealing. In the present invention, a material obtained by kneading various gas absorbing agents into such a film material is used. These Adverse gas absorbent finely grinding the cristobalite such Oya, SiO _2, TiO _2, Fe
It is preferable to add a metal oxide such as ₂ O ₃ or Na ₂ O, sinter, and further perform a special oxygen treatment. Alternatively, a porous adsorbent such as activated carbon and diatomaceous earth is used, but a transparent porous material is preferable. It absorbs ethylene, ammonia and other harmful gases generated during the cultivation of plastic mushrooms into which these are kneaded, thereby improving the growth of mushrooms.

In this way, the harmful gas absorbent is used for plastics at 0.
1 to 10% by weight, preferably 0.5 to 5% by weight. 0.1
If it is less than 10% by weight, the harmful gas absorbing effect is not sufficient, and if it exceeds 10% by weight, the film-forming properties, heat-fusibility and other properties of the plastic are lost. The shape of the cultivation bag is not particularly limited,
Vertical length is preferred and the upper end is open for filling with sawdust containing nutrients and inoculation of mycelium. After inoculation of the hypha, the bag mouth may be fused, but it is possible to prevent the invasion of various bacteria by simply turning it back several times.

The cultivation bag is provided with an opening in the bag body. The opening is rectangular or round, and the size varies depending on the type of contents, the size of the bag, the type of mushroom, and the like. In cultivation, it is preferably above the part where sawdust is inserted. The perimeter of the hole is fused using a filter having fine holes large enough to completely cover the opening, and the air permeability is cut off by sealing or the like to seal the hole. Gases such as oxygen and carbon dioxide can flow through the inside of the bag through the micropores of the filter. The opening is not limited to the hole shape, and may be provided in a belt-like shape. In this case, cover the filter over the opening,
What is necessary is just to make a filter contact both edges of an opening part. Also,
Two or more openings may be provided.

Molds, viruses, and microporous filters
Do not allow passage of microorganisms such as bacteria and spores, that is, 0.
Any filter may be used as long as it has fine gaps that do not allow the passage of fine particles of 01 μ or more, preferably 0.02 μ or more, more preferably 0.05 μ or more. However, it is desirable that the gas passage resistance is small in order to make air flow smoothly, and a single-layer filter in which uniform holes of a controlled size are continuous is preferable. For example, Duragard (trade name) manufactured by Celanese Corporation in the United States is a porous film made of polypropylene, and is a filter having a single-layer through hole of about 0.02 to 0.04 μ × 0.2 to 0.4 μ. When a material is used, the microorganisms have a high affinity for water, so that even if the microorganisms are difficult to pass through and have the same pore size, the effect of blocking various germs is further enhanced.

[Action]

The present invention does not merely enclose a mushroom cultivation material having breathability and exclude invasion of various bacteria, but imparted to the bag material itself a function of absorbing a harmful gas generated in a small amount as the mushroom fungus grows. Thereby, the whole bag material has the effect of the absorbent. Therefore, the date and time required for the growth of mushroom bacteria can be shortened by a synergistic effect of the aseptic effect of freely flowing air and the effect of absorbing harmful gas in the entire bag material.

〔Example〕

_{SiO 2 87%, Al 2 O} 3 5%, Fe 2 O 3 1.5%, 1% or less of CaO,
A harmful gas obtained by crushing natural cristobalite containing Na ₂ O, TiO ₂ , MgO, and K ₂ O and adding a small amount of TiO ₂ and Fe ₂ O ₃ to the sintered fine powder to absorb oxygen About 3% of the absorbent was kneaded into raw polypropylene and extruded to obtain a transparent film having a thickness of 40 μm.

Using this film, a bag having a circumference of 50 cm and a depth of 50 cm was manufactured, and a circular opening having a diameter of 2 cm was perforated at about 1/3 from the bottom of the bag. A substantially square hydrophobic Duragard (trade name, manufactured by Celanese Corporation) having a side length of 4 cm
Polypropylene single-layer microporous film) was fused to form a cultivation bag. Therefore, the opening of this bag was completely covered by Duragard.

Sawdust 4: Rice bran 1 cultivation material (water content 62%)
3 liters were added, sterilized by heating at 120 ° C for 1.5 hours, and cooled to 25 ° C. Then, the fungi were seeded and sealed using known means such as fusing the bag mouth, wrapping around the bag mouth and clipping, or crimping the bag mouth with a flat pressing clip. When this was cultured at 20 ° C. for about 25 days, the whole cultivated material was covered with white hyphae. When the bag was opened and transferred to a room with a humidity of 90% and a temperature of 15 ° C, about 700 g of Maitake mushrooms were collected after 15 days.

Separately, cultivation of Maitake mushrooms in the same manner as in the example using the same cultivation bag as in the example except that the fine powder of the harmful gas absorbing material was not kneaded, it took about 30 minutes until the whole was covered with white hyphae. It took days.

〔effect〕

According to the present invention, it is possible to provide a mushroom cultivation bag capable of eliminating invasion of various bacteria while supplying air and eliminating harmful gas from the entire bag material, and eliminating bags that are contaminated by various bacteria and become unharvested. The cultivation date and time can be further reduced.

Claims (1)

(57) [Claims] 1. A bag comprising a film produced by blending a fine powder of a harmful gas absorbent into a thermoplastic, and the periphery of the film being fused except for one side, wherein an opening is formed in a part of the film. A cultivation bag for mushrooms, wherein the opening is covered with a filter having fine pores through which fine particles having a diameter of 0.01 μ or more do not pass.