JPH05103600A - Dry pellet - Google Patents

Abstract

PURPOSE:To produce an economical dry pellet excellent in the feed efficiency and productivity while freely controlling the buoyancy by forming a space for controlling the buoyancy by using a non-expanded space-forming material. CONSTITUTION:An objective pellet suitable for a feed for fish culture obtained by adding a non-expanded space-forming material shrinking by drying, disappearing by evaporation, swelling without showing viscosity by absorption of water and free from gelatinization to pellet raw materials such as fish powder, soybean oil cake and wheat floor, kneadig the resultant mixture extruding and forming the kneaded material into a rod shape of 3mm-1cm diameter and drying it.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dry pellet used as a feed for cultured fish, and more particularly to a dry pellet whose buoyancy can be adjusted.

[0002]

2. Description of the Related Art In recent years, there has been a great demand for cultured fish, and various dry pellets serving as a feed thereof have become widespread. Recently, dry pellets having an appropriate buoyancy have been particularly demanded. This is because fish such as salmon, cod, and salmon fry, which are high-grade farmed fish, eat only floating bait, and sea bream and hammachi tend to prefer pellets that show a slow sinking method. This is because.

Usually, dry pellets are fish meal, soybean oil cake,
It is manufactured by extruding a mixture of plural kinds of rice bran, wheat flour, cornmeal, vitamins and the like, and then extruding the mixture, cutting it to an appropriate length, and then drying.

Most of the dry pellets produced in this way have a low buoyancy, and among the conventional dry pellets, foamable and porous dry pellets (hereinafter referred to as EP) exhibit buoyancy, so only floating bait is used. It has been used as food for fish that we do not eat.

[0005]

However, in the production of EP, the step of foaming starch by steam pressurization at 130 ° C. increases in production, and the foaming causes gelatinization and swelling of the starch. In addition to poor disintegration, destruction of nutrients such as vitamins has occurred during the expansion process, and since productivity is low, it is more expensive than other dry pellets. Moreover, EP contains 130% of water-soluble starch.
Blood sugar level rises because it swells at ℃ and becomes porous,
I am worried about the deterioration of growth.

The present invention has been made in view of these points, and an object thereof is to provide a dry pellet which can be produced by freely controlling the buoyancy, has a high feed efficiency, and has good productivity and low cost. And

[0007]

In order to achieve the above object, the dry pellet of the present invention is characterized in that a buoyancy adjusting space is formed by a non-foaming space forming object.

The dry pellets according to the second, third, and fourth aspects are characterized in that the space forming material contains a substance that shrinks when dried, disappears when evaporated, and moves to the dry pellet with the passage of time. It is characterized by being used.

[0009]

According to the dry pellet of the present invention, since the buoyancy adjusting space is formed by the non-foaming space forming object, the buoyancy and the sedimentation speed of the dry pellet are arbitrarily adjusted according to the ecology of the fish to be cultivated. Also, it has good disintegration property after hydration, so it has good digestion and absorption properties, and also has good meat thickening coefficient and food efficiency.

Further, since no effervescent substance is used as a raw material, there is no heat denaturation of proteins and destruction of nutrients such as vitamins. In addition, for sick fish, the space of dry pellets is used for water conversion. The drug can be effectively treated by administering the dissolved drug.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to FIGS.

The dry pellet 1 manufacturing method of the present invention comprises:
First of all, fish meal, soybean meal, wheat flour, which is the raw material for pellets,
A mixture of a plurality of powders of rice bran, corn meal, vitamins, etc., and a non-foaming space-forming material 2 that swells when water is absorbed but has no viscosity and does not gelatinize, A substance that has physical properties that shrinks when dried, disappears when evaporated, and moves into the component material of the dry pellet is mixed with water and kneaded. next,
The kneaded material is extruded into a rod shape having a diameter of about 3 mm to 1 cm, and the extruded rod-shaped pellet is cut into a length of 3 mm to 2 cm. The pellets at this stage are still moist, but in the next step, the pellets that have become simple substances are dried to shrink the space forming material 2 or to evaporate and eliminate the space forming material 2.
The dry pellet 1 is manufactured by transferring into the component material of the dry pellet.

A large number of hollow buoyancy adjusting spaces 3, 3 ... Are formed inside the dry pellet 1 manufactured in this way in the portion where the space forming object 2 was located. By holding the space 3, the dry pellet 1 having buoyancy is obtained. In the dry pellet 1 of the present invention, it is possible to control the buoyancy by adjusting the total amount of the buoyancy adjusting space 3 depending on the content and size of the space forming material 2.

FIG. 1 shows a first embodiment of the present invention, which is an example in which a material that shrinks when dried is used as the space forming material 2. A plurality of buoyancy adjusting spaces 3, 3, ... Are formed inside the dry pellet 1, and a dried and contracted space forming object 2 remains in the buoyancy adjusting space 3. In this case, examples of the space forming object 2 include seaweeds such as wakame seaweed, blue sea bream, and swordfish.

FIG. 2 shows a second embodiment of the present invention, in which a substance that disappears when evaporated or a substance that migrates into the component material of the dry pellet 1 is used as the space forming material 2. Here is an example. Examples of the substance that disappears when evaporated in the space forming material 2 include ice, but ice mixed with other raw materials is melted in the heating and drying process to form ice. The water that had been evaporated evaporates, and after the ice is located, the buoyancy adjusting spaces 3, 3, ... Are left and formed. Further, various oils can be mentioned as the dry pellet transfer substance that transfers into the component material of the dry pellet 1 with the passage of time.

Next, the operation of the present invention will be described.

In the dry pellet 1 of the present invention, the buoyancy adjusting space 3 is formed by the non-foaming space forming product 2, and the buoyancy and the sedimentation speed of the dry pellet 1 can be arbitrarily adjusted according to the ecology of the fish to be cultivated. it can. Since conventional pellets do not have buoyancy, they will sink quickly.Therefore, for bait and fish that require floating bait, feed only a limited amount within a limited time immediately after feeding. I couldn't do that, and there was a lot of wasted food. However, the dry pellet 1 of the present invention can control even the floating time and the speed at which water is contained and settles, and since all the baits can be supplemented over time after feeding, Up until now, it has become easy to cultivate fish that were difficult to raise.

Since the dry pellets 1 having buoyancy produced in this way do not use a foaming raw material, the nutrients contained in the dry pellets 1 are not deactivated, the feed efficiency is improved, and the buoyancy is adjusted. By having the working spaces 3, 3 ..., the disintegration property after hydration is good, which leads to promotion of digestion of the fish and improves the growth of the fish.

Further, by injecting a substance other than air into the buoyancy adjusting space 3 of the dry pellet 1, for example, a drug, a nutrient, etc. and feeding the fish, it can be used for administration of the drug, nutrient, etc. it can.

The production of the dry pellets 1 of the present invention can be carried out without changing the conventional production process of the dry pellets, the factory productivity is good, and no special equipment is required. Is excellent in nutritional balance,
Moreover, it is possible to supply dry pellets with good feed efficiency.

The present invention is not limited to the above-mentioned embodiments, but can be modified as necessary.

[0022]

As described above, since the present invention is constructed and operates, according to the dry pellet of the present invention, the buoyancy can be freely controlled, and the wasted bait can be reduced. Furthermore, since there is no destruction of nutrients, the coefficient of meat thickening and the efficiency of feed are good, and fish that have been difficult to raise up to now can be easily cultivated. Further, the buoyancy adjusting space of the dry pellets can be used to administer a drug and the like, and the drug can be supplied at a lower cost than EP.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view showing a first embodiment of a dry pellet of the present invention.

FIG. 2 is a vertical sectional view showing a second embodiment of the dry pellet of the present invention.

[Explanation of symbols]

 1 dry pellet 2 space forming object 3 buoyancy adjusting space

Claims (4)

[Claims] 1. A dry pellet in which a buoyancy adjusting space is formed by a non-foaming space forming material. 2. The dry pellet according to claim 1, wherein the space forming material is made of a material that contracts when dried. 3. The dry pellet according to claim 1, wherein a substance that disappears when the space forming material is evaporated is used. 4. The dry pellet according to claim 1, wherein a dry pellet transfer material is used for the space forming material.