JPS5946566B2 - Earthworm culture tank - Google Patents

Description

[Detailed description of the invention] The present invention relates to an earthworm culture tank.

Recently, large numbers of earthworms have been cultivated, and the earthworms are used as fishing bait for fish, and the excreted soil is effectively used as fertilizer and other purposes.
The business of worm farming is expected to continue to grow in the future.

'However, in order to cultivate large quantities of earthworms, a large area of land must be used as the cultivation bed, and the earthworms are unevenly distributed and growth spots occur, making it difficult to cultivate them into adults of a uniform size. It takes a lot of effort to manage the floor.

Furthermore, separation of excrement excreted by earthworms also requires manual labor.

The present inventor has developed a culture tank that can raise a large number of uniformly sized earthworms in a short period of time using as little feed as possible, and that does not require feed supply, suppression of moisture increase in the culture bed, or management of moisture, temperature, etc. invented.

The present inventor has proposed that in a worm culture tank containing feed and cotton waste, such as cotton linters, as a culture bed, if the feces excreted by the earthworms are excreted not only from the upper surface of the culture bed but also from the side wall, the earthworms will In addition, it is important to limit the unit storage capacity of the feed culture bed, especially the depth of the pile, and to limit the unit capacity of the feed culture bed, especially the depth of the pile, and to By providing sufficient ventilation from the feeder, the temperature rise associated with feed fermentation can be suppressed, and the moisture content of the culture bed can be maintained at 75 to 80% at all times, so there is no significant moisture increase or uneven distribution of moisture that would kill the earthworms. This discovery led to the present invention.

To explain the culture tank of the present invention with reference to the drawings, 1 is a container containing earthworms and feed with a capacity of 30 to 80 A, for example, a box-shaped tank, and the side wall 2 has a height of 30 cIrL. A large number of ventilation holes 3 with a hole diameter of 5 to 2011t11L are bored, and the area ratio of the ventilation holes to the side wall area is 15.
It is set so that it becomes ~40%.

The present invention is characterized by having many ventilation holes in the side wall of the culture tank that houses the earthworms and feed, which allows for drainage of moisture that increases during culture, and at the same time improves ventilation and reduces the temperature rise caused by the fermentation of the feed. To suppress earthworm excrement and also to discharge earthworm excrement from the side wall.

Earthworms live not only on the upper surface of the culture bed 1' but also on the side wall 2 of the tank.
Since the insects can also excrete from the inside, the bed becomes an even and optimal environment, and a large number of eggs can be laid, fertilized, and grown into adults in a short period of time.

Therefore, they ingest enough feed and excrete it all into feces in a short period of time.

The fact that this period of time for turning into dung is much shorter than in conventional aquaculture is extremely convenient from the standpoint of feed supply and additional management.

Appropriate shapes for the ventilation holes 3 provided in the side wall include a circular or intermittent linear arrangement of perforations, or a structure in which the side wall or the entire side wall of the tank is made of a woven structure such as bamboo, and the gaps formed by the weaving are used as ventilation holes. be.

Moreover, since the present invention is a tank with a limited feed capacity of 30 to 807 cm, and the culture bed is accommodated so that the depth of accumulation is 300 mm or less, it is easy to reach from the side wall 2 to the center of the bed 1'. It can be aerated and the moisture in the culture bed can be kept at 75% at all times.
Maintain at ~80%.

Furthermore, in particular, conventional aquaculture tanks are
This culture tank can completely prevent the temperature from rising to 0°C and maintain the temperature at 30°C or lower.

In this way, the ventilation holes suppress moisture increase and provide sufficient ventilation, so special care must be taken to adjust the moisture content in the feed.It does not take much effort, but if you cover the top of the culture bed, there will be a top cover or a hygroscopic layer. Cover with sheet 4 to prevent moisture from escaping.

Furthermore, the bottom of the culture tank is not just a bottom plate, but has several small holes for draining water.

According to the culture tank of the present invention, since an environment suitable for earthworms can be maintained, it has been clearly observed that the earthworms in the feed sloughed and grew in large numbers and became adults in a short period of time.

In addition, the fact that a large amount of manure is discharged from the side wall and almost all of the feed is turned into manure in a short period of time is proof that the tank is suitable for cultivating earthworms, and it also makes it easier to manage the feed supply during the culture period. It is something.

Example Feed containing pig feces, sawdust, and cotton waste with 75% moisture retention and 1,500 earthworms were placed in a culture tank of the present invention (600 mm vertically, 400 horizontally, 2 times high).
00 dragon side wall ventilation hole hole diameter 10mm, ventilation hole area ratio 2
′θ%, made of plastic), the surface was covered with cardboard as the top lid, and the culture was carried out while observing the growth state.

The results are shown in the table below in comparison with a conventional culture tank enclosed in a flat area.

As shown in the above table, in the culture tank of the present invention, the increase in the growth rate is remarkable, the period from spawning to adult stage is extremely shortened, and additional feed management is easy, and all the feed is converted into manure. It can be seen that since there is no need for separation, there is no need for labor to process the manure.

[Brief explanation of the drawing]

The drawing is a partially cutaway perspective view of the culture tank of the present invention. 1...Aquaculture tank, 1'...Aquaculture bed, 2.
...Side wall, 3...Vent hole, 4...
・Sheet.

Claims (1)

[Scope of Claims] 1. Earthworm culture tank 0 characterized in that a large number of ventilation holes are provided in the side wall of the tank having a capacity of 30 to SOZ, and earthworms and feed are housed in the tank at a deposition depth of 300 cm or less. The earthworm culture tank according to claim 1, wherein the ventilation holes are circular holes or linear holes. 3. The earthworm culture tank according to claim 1, wherein the ventilation holes are formed by gaps formed by an assembled structure of bamboo or the like. 4 Vent holes with a hole diameter of 5 to 20 mm per side wall area
The earthworm culture tank according to claim 1, 2, or 3, which is provided in such a manner that the area ratio is 8 to 40%.