JPH0120847Y2 - - Google Patents

Description

[Detailed explanation of the idea]

The present invention relates to a cap for a mushroom cultivation bottle, and more specifically, the present invention relates to a cap for a mushroom cultivation bottle, and more specifically, the inoculum inoculated on a medium is pressed and compressed by the bottom surface of the cap fitted into the bottle opening, thereby increasing the hyphae density of the inoculum. This invention relates to a mushroom cultivation bottle cap suitable for use in cultivating mushrooms such as shimeji mushrooms. Generally, in the artificial cultivation of mushrooms, a culture medium is filled into a cultivation bottle, a seed fungus is inoculated onto this medium, the necessary culture is carried out, and after the culture is completed, the old seed fungus is scraped out to allow sprouting and growth. I have to. It is known that good cultivation of shimeji mushrooms can be achieved by inoculating the inoculum and compressing the inoculum on the underside of a cap to increase the hyphae density. Furthermore, when shimeji mushrooms are scraped out (hereinafter referred to as fungal scraping) of the old seed fungus mentioned above, only the epidermis of the seed fungus is scraped off, leaving the seed fungus in an upwardly convex lens shape on the culture medium. It has the property of being able to obtain fruit bodies with excellent shapes and less deformity. In addition, the larger the amount of inoculum left in the lens shape, the better to obtain fruit bodies with less deformity. However, as shown in Fig. 1, the caps used in conventional cultivation have a flat pressing surface 12 that presses on the inoculum 10 after inoculation, so the inoculum is compressed and the upper surface becomes flat, allowing the bacteria to During scraping, when scraping off the epidermis of the inoculum using the fungus scraping blade 14, which has an arcuate cross section as shown in FIG. A large amount of the peripheral part of the inoculum is scraped off,
There is a problem that the amount remaining is so low that it is not possible to obtain the well-shaped fruit bodies described above. Furthermore, the greater the amount of inoculum scraped out, the greater the degree of cutting of the hyphae that connects the inoculum and the underlying culture medium.
Not only does this have an adverse effect on the germination of fruiting bodies, leading to a decrease in yield, but it also has disadvantages in that it is unfavorable in terms of the efficiency of bacterial scraping. The present invention was devised in view of the above-mentioned difficulties, and its purpose is to provide a cap for mushroom cultivation bottles that can reduce the degree of cutting of hyphae, allow good fungal scraping, and shorten the cultivation period. It is in. This object can be achieved by the present invention having the following configuration. That is, the present invention provides a cap that is attached to the mouth of a cultivation bottle containing a culture medium inoculated with mushroom inoculum on the upper surface, the cap having a downwardly protruding lower bottom surface provided on the lower surface of the cap. is formed on the pressing surface of the inoculum, wherein a concave lens-shaped concave surface is formed at least near the center of the bulging lower bottom surface of the cap. be. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In FIG. 3, the general reference numeral 20 denotes a cap, which is tightly fitted over the bottle opening 26 of the mushroom cultivation bottle by means of a fitting wall 24 projecting annularly from the lower surface of the bottom plate 22, so as to cover the bottle opening 26. It's summery. Bottom plate 2
An annular side wall 28 is erected upward from the two end edges, and a cavity A is formed by fitting the top plate 30 to the upper edge of the annular side wall 28. 32 is a bottomed bulge formed by recessing the center of the bottom plate 22, and bulges into the bottle opening 26 space, and the lower bottom surface 34
is recessed in a curved surface that forms part of a spherical surface. The lower bottom surface 34 presses the inoculum 38 inoculated onto the culture medium 36 filled in the mushroom cultivation bottle. Normally seed culture 38 is medium 36
It is inoculated in a heap at the center of the top, but the cap is 20
By the pressure of the bulging lower bottom surface 34 when the seed culture medium 38 is fitted into the bottle opening 26, the inoculum 38 is further brought to the center as shown in the figure, and is compressed into an upwardly convex lens shape on the culture medium 36. becomes. The outer diameter of the side wall of the bulging portion 32 is set to be slightly smaller than the inner diameter of the bottle mouth 26, and air circulation holes 40 are opened at appropriate intervals in the side wall.
A filter 42 is made of a porous elastic material such as urethane foam, and is elastically mounted between the inner bottom surface of the bulging portion 32 and the inner upper surface of the upper plate 30. Note that 44 is a support piece that supports the side surface of the filter 42 at appropriate intervals. Reference numeral 46 denotes air circulation holes opened in the bottom plate 22 at appropriate intervals, and communicates the cavity A with the outside air.
Therefore, the inside of the bottle mouth 26 and the outside air are connected to the air circulation hole 46, the cavity A, the filter 42, and the air circulation hole 4.
0 allows for air flow. The present invention is constructed as described above. When the cap 20 of the present invention is used, the inoculum 38 is compressed onto the culture medium 36 in the shape of a lens with a thick center and a convex shape, as described above. Therefore, as the hyphae density increases, the amount of hyphae especially in the central part increases, so hyphae spread in a short period of time even into the medium, where it is relatively difficult for hyphae to move, and culture is carried out efficiently. When the cap 20 is removed after the cultivation is completed, the inoculum is left on the medium 36 in the shape of an upwardly convex lens. Therefore, when scraping off the inoculum using the above-mentioned bacterium scraping blade 14 or the like and leaving the inoculum in an upwardly convex lens shape on the culture medium 36, there is no need to scrape off the peripheral part of the inoculum thickly as in the conventional method. Since the surface layer only needs to be scraped to a certain thickness, scraping can be done without difficulty, and there is less chance of cutting the hyphae. Note that the concave surface of the lower bottom surface 34 of the bulging portion 32 does not necessarily have to be a spherical surface, and may have a shape close to a spherical surface. In other words, it is preferable to have a concave surface that allows the epidermis to be scraped to a substantially uniform thickness when the epidermis of the seed culture 38 is scraped off. In addition, as shown in FIG.
The center view can also be made concave so as to leave some flat part on its periphery. Next, a specific example of cultivating mushrooms using the cap of the present invention will be shown below. Inoculum of Hypsizigus marmoreus was inoculated into a mushroom cultivation bottle filled with a medium whose main ingredients were sawdust and rice bran. The caps were covered with the conventional caps shown below and cultured under the same conditions, and the average number of days for mycelial spread was investigated. Next, after the cultivation was completed, the surface of the seed layer was scraped with a fungus scraping blade shown in Figure 2 to form a convex lens shape to generate fruiting bodies, and the number of bottles in which good fruiting bodies had developed and the malformations were determined. The number of bottles in which fruiting bodies appeared was investigated. The results of these surveys are shown in the table below.

[Table] According to the cap related to the present invention as described above,
Since the swollen lower bottom surface of the cap is formed in advance into a concave surface close to the surface shape of the seed fungus to be scraped, when scraping the seed fungus, the skin of the seed fungus can be scraped off to a nearly uniform thickness, which reduces the number of mycelium cuts. You can scrape away the bacteria. Furthermore, since the inoculum is concentrated in the center and the amount of hyphae in the center increases, the circulation of bacteria inside the medium, which is difficult for bacteria to circulate, is improved, and the overall effect is that the culture period can be shortened. Although the present invention has been variously explained above using preferred embodiments, the present invention is not limited to these embodiments, and it goes without saying that many modifications can be made without departing from the spirit of the invention. It is.

[Brief explanation of drawings]

FIG. 1 is an explanatory view showing the shape of the bulging lower bottom surface of a conventional cap, and FIG. 2 is an explanatory view showing the state of bacterial scraping in that case. FIG. 3 is a sectional view of an embodiment showing the shape of the cap according to the present invention, and FIG. 4 is a sectional view showing another embodiment of the shape of the bulge. 10... Inoculum, 12... Pressing surface, 14... Bacteria scraping blade, 20... Cap, 22... Bottom plate, 24...
Fitting wall, 26...bottle mouth, 28...fitting side wall, 3
0...Top plate, 32...Bulging part, 34...Lower base,
36... Culture medium, 38... Inoculum, 40... Air circulation hole, 42... Filter, 44... Support piece, 46
... Air circulation hole, 50 ... Bottom surface.

Claims (1)

[Scope of utility model registration request] A cap that is attached to the mouth of a cultivation bottle containing a culture medium inoculated with a mushroom inoculum on the upper surface, and a bulging lower bottom surface provided on the lower surface of the cap and protruding downward is a pressing surface for the inoculum. 1. A cap for a mushroom cultivation bottle, characterized in that a concave lens-shaped concave surface is formed at least near the center of a bulging lower bottom surface of the cap.