JPS59159718A - Seed log of mushroom - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to seed pieces used for mushroom cultivation.

Traditionally, mushroom seed pieces are produced by processing logs of the same species used for mushroom cultivation, such as oak, Japanese chinquapin, can, and beech, in the order of boards, sticks, and pieces, and these pieces of wood (Ikoma) are inoculated and cultured with mushroom fungi. I was able to get a seed piece.

The production of these seed pieces was very time-consuming and had nine drawbacks, such as being expensive because raw wood was difficult to obtain.

In addition, as a solution to the above-mentioned drawbacks, there is a piece made of sawdust, rice bran, and vegetable fibers molded into a piece shape. However, productivity is low because the plaster cannot be removed from the mold for a long time until it hardens, and in order to obtain the driving strength of the seed pieces, the proportion of plaster is high (80-90%).
Therefore, there were drawbacks such as the propagation of mushroom mycelium being easily inhibited.

The present invention solves these drawbacks and consists of 30 to 70 parts by weight of sawdust, 5 to 10 parts by weight of bran, 3 to 7 parts by weight of plaster, and 20 to 60 parts by weight of fibrous thermoplastic. To provide a mushroom seed piece obtained by inoculating a mushroom fungus into a fresh mushroom molded into a piece shape with a culture medium mainly composed of synthetic resin pieces.

The mushroom seed pieces according to the present invention are inexpensive because they are mainly made of waste materials such as sawdust, and seed pieces in the desired shape can be produced in large quantities by heating and pressurizing them with thermosolable synthetic resin pieces.
Furthermore, the sawdust and bran have better nutrients than seeds obtained from natural logs, so mushroom fungi are particularly well-propagated, allowing the fungi to circulate quickly and shorten the number of days required for culturing.

The sawdust used in the present invention includes sawdust of oak, oak, beech, Japanese oak, etc., as well as wood chips for paper manufacturing raw materials, pulp fibers, sugar cane pomace, etc. alone or in combination of two or more. .

If the amount is too high, it will not have enough hardness as a seed, and if it is too low, the growth of mushroom fungi will be insufficient.
70 parts by weight is preferred.

Further, as the bran, in addition to grain bran such as rice, barley, and corn, a small amount of wheat flour, rice flour, and polysaccharides such as glucose and sugar may be added. If the amount is too small, there will be a lack of nutrients and the growth of mushroom fungi will be insufficient, and if it is too large, there will be too much nutrients, which will not only be uneconomical but also increase the risk of breeding of various bacteria. is preferred.

In addition, calcined gypsum is used to bind and fix the culture medium to each other and neutralize the organic acids generated during the growth of mushroom fungi to maintain a favorable environment for the growth of mushroom fungi over a long period of time, so it is added in large amounts. Addition of 3 to 7 parts by weight is preferable since the growth rate of mushroom fungi will deteriorate if it is added too much or too little.

In addition, the thermoplastic plastic strips used in the seed piece of the present invention are foamed plastic strips that have a relatively low softening point and contain little solubilizing agent, such as polyethylene, polypropylene, ethylene vinyl acetate copolymer, and holystyrene. Pieces, fibrous strips, powder strips, etc. are used. This thermoplastic is melted by heat and pressure, bonded and fixed with other culture medium compositions such as sawdust, rice bran, and calcined plaster, and molded into pieces of any shape, and functions as seed pieces. Above all, when fibrous pieces are used, they get entangled with sawdust, grains, etc. in the culture medium, so they are conveniently bonded and immobilized without covering the entire surface of the pieces, so air and moisture are kept inside the piece. It is particularly desirable because the required amount of seeds can be supplied as quickly as or more conveniently than conventional seeds. Further, if the amount is too small, the fixed molding will be insufficient, and if it is too large, the nutrients in the culture medium will be relatively low and the growth rate of mushroom fungi will be deteriorated, so it is preferable to add 20 to 60 parts by weight.

The method of molding these culture medium compositions into a piece shape is to sterilize each blended composition by heating it in a high-pressure cooker or the like before or after mixing, and then shape it by heating and pressurizing it by a method such as extrusion molding or mold molding. . In addition, the obtained molded product has a moisture content of 45 to 6 to make it suitable for the growth of mushroom fungi.
It is preferable to adjust it to 0%. For this purpose, the desired moisture content is adjusted by spraying or soaking the molded product in a 1-3% aqueous solution of glucose, etc. In order to perform this second step more efficiently, a small amount of surfactant is added. It is preferably added to the culture medium composition or the above-mentioned water adjustment solution.The shape of the seed pieces is not particularly limited, but
It has a conical shape, so-called Komagata, and has a slightly tapered tip so that it can be easily driven into logs for mushroom cultivation, and preferably has a diameter of 5 to 15 m and a length of 10 to 25 fim.

Next, examples of the present invention will be described.

In Example 50, 7 oak sawdust and 10 kg of rice bran were added at 120°.
C for about 2 hours, and then added 5 kg of calcined plaster, 40 kg of polypropylene fiber (2 denier, fiber length 6 ran), and 0.1 of Seaguar ester surfactant.
Mix the kf well and make the tip diameter 5rfm and the rear end diameter 1.
Approximately 150 mm by using a seed molding mold with a depth of 17 Nn at 0 rMn.
A molded article for a seed piece was obtained by applying pressure for 30 seconds at .degree.

This was immersed in a 3% glucose aqueous solution for 3 hours to adjust the moisture content to 45%, and then inoculated with Shiitake bacteria and heated at 24°C.
Shiitake seeds were obtained by culturing.

When we inoculated 1,000 of the obtained seed pieces onto logs and looked at the survival rate, 973 seed pieces acted as good inoculations, which was better than the conventional seed pieces made from natural logs and was easy to handle. It was good and the production cost was saved by about 30 units.

Claims (1)

[Claims] 30 to 70 parts by weight of sawdust and 5 to 10 parts by weight of rice bran,
Mushroom seeds obtained by inoculating mushroom fungi into Ikoma molded into a piece-shaped culture medium containing 3 to 7 parts by weight of calcined pepper and 20 to 60 parts by weight of fibrous thermoplastic plastic pieces as main components. pieces.