JP2016165296A - Cultivation method using cultivation base material for seaweed belonging to porphyra generating thallus directly from filament - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cultivation method using a cultivation base material for seaweed belonging to Porphyra generating a thallus directly from a filament.SOLUTION: On a cultivation base material 1 used in a cultivation method for seaweed, projections 11 containing calcium carbonate as a main component, and formed by crushing coral or the like which is one of bones and fossils of a plurality of organisms by a prescribed size are fixed on a base 21 with a projection fixing material 31 which is a cement, an adhesive or the like. A free filament of seaweed belonging to Porphyra generating a thallus directly from a filament to the cultivation base material 1 is finely shredded by a mixer, and the shredded filament is sowed on top surface of the cultivation base material 1 in a water tank filled with sea water. The filament is perforated in each projection 11 to be raised for 1-10 months, and after then, the cultivation base material is installed on sand or rock land which becomes tideland during low tide.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a culture method using an aquaculture base for laver belonging to the genus Amanori, which directly produces a frond from a filamentous body typified by the red sea bream.

  There are many species of seaweed that are cultivated in the sea and used for food, in the genus Amanori of the plant family seaweed red algae plant genus Red algae Lepidoptera. Seaweeds belonging to the genus Amanori can be roughly divided into two, depending on their life cycle. One is typical cultivated seaweed, such as Susabinori and Asakusanori, and the life cycle of Susabinori drops fruit spores from edible fronds in early spring. These fruit spores germinate and perforate on the shells of bivalves such as oysters and clams to form filaments, and the perforated filaments grow in the shells. After September, when the seawater temperature drops, shell spores made from filamentous spore spores grown in the shells are released into the seawater and settle on surrounding driftwood, coastal rocks and fishing nets. The grown shell spores germinate and grow to form foliates.

  In general, aquaculture such as sabbinori makes use of the characteristics of the above life cycle, and artificially cultivates shell spores on the aquaculture net to cultivate intensively to obtain a large number of fronds. In addition, there is also a method in which shell spores are grown on a growing device resembling a rock and cultured as a rock nori (Patent Document 1). For this reason, it is necessary to obtain shell spore intensively in normal laver culture, and the filamentous body is perforated in shells such as oyster shells and cultured in large quantities. Shells with perforated filaments are generally called “seed shells” in nori culture. The culture of “seed shellfish” is usually performed by chopping the filamentous bodies called “free filamentous bodies” that are managed and cultured in flasks or the like without perforating the spores that fall from the laver fronds, or by drilling the fruit spores into the shells, It is done by sowing and drilling on shells. “Seed shellfish” is generally cultured in an indoor water tank, and a technique for culturing a large amount intensively through artificial management has been established (Patent Document 2). Hereinafter, the seaweed having a life cycle typified by Susabiori is referred to as seaweed belonging to the genus Amanori, in which shell spores grow and become foliate.

  On the other hand, in the species of the genus Amanori typified by Kaiganaramanori, the life cycle from the fall of the follicular spores to the germination and perforation of the fallen spores on the bivalve shells to grow into filamentous bodies is as follows. Is the same as, but the shellfish does not release shell spores from the perforated filamentous body, and the tip of the filamentous body perforated in the shell opens to the surface of the shell and germinates directly from the opening to produce an edible leaf. Its main feature is that it has its own life cycle, which is the origin of the name “Kaigara Amanori”. Hereinafter, the seaweed having a life cycle typified by the Japanese seaweed Amanori is referred to as a seaweed belonging to the genus Amanori, which produces a leaf-like body directly from the filamentous body. In addition, although the only seaweed that belongs to the genus Amanori that produces a frond directly from the filamentous body is currently known, it is likely to be discovered in the future.

  The laver belonging to the genus Amanori, whose shell spores grow into foliar bodies, perforates the leaf layer on the inner side of the shell, and grows and grows horizontally from the leaf layer after drilling. However, the seaweed culture substrate belonging to the genus Amanori, which produces foliate directly from the filamentous body, has no selectivity on the perforated surface of the shell and can be well perforated and grown in both the shell surface and the leaf layer. Other shell spore grows into a leaf-like body, and in addition to horizontal growth, it deeply drills vertically and penetrates to the opposite side of the drilling start surface.

  The technology for cultivating `` seed shellfish '' in a large amount has been established, and the laver belonging to the genus Amanori and the laver belonging to the genus Amanori, which produces foliate directly from the filamentous body, the shell spores grow and become foliate. The culture technology of “seed shellfish” is almost the same, but for seaweed “seed shellfish” belonging to the genus Amanori, where shell spores grow into fronds, only bivalves with relatively smooth foliar layers such as oysters and scallops are used. On the other hand, the “seed” of laver belonging to the genus Amanori, which produces foliate directly from the filamentous body, can be of any shape.

  In the cultivation of Amori laver that grows into follicles of shell spores, “seed shellfish” is a shell spore culture substrate for generating shell spores, whereas Amanori spp. Which produces foliates directly from filamentous bodies In the cultivation of seaweeds belonging to, "seed mussels" are not intended to produce shell spores but to serve as a culture substrate for the purpose of collecting fronds. Therefore, in order to cultivate seaweeds belonging to the genus Amanori that directly produce fronds from filamentous bodies, “seed shellfish” were to be installed directly on fishing grounds and used for aquaculture.

JP 2006-34158 A JP 2005-102615 A

  However, when oysters and scallop shells, which are commonly used for “seed shellfish”, are used as a culture base for seaweeds belonging to the genus Amanori, which produces leafy bodies directly from filamentous bodies, holes are formed in oysters and scallop shells. They were connected by a method such as passing a string, and fixed to a large amount in the sea or in a tidal flat and used as a culture substrate. The oysters and scallop shells used in this “seed shell” are usually distributed in the market in a single unit or connected to 10 to 20 pieces with a string. A large amount of oysters and scallop shells are required for installation in a large area, and this requires a lot of labor and time for the farmer.

  In addition, when trying to use the oyster scallop shell as a seed shell of the seaweed belonging to the genus Amori that grows into a frond, the shell spores grow and become a frond, “Seed shellfish” is considered to be used to cultivate shell spores by suspending them in an indoor water tank just to obtain shell spores. The shape and size of oysters and scallop shells of “Seed shellfish” Were connected in different states and circulated in the market. In the seaweed belonging to the genus Amanori, which produces a frond directly from the filamentous body, sunlight for photosynthesis is required in the process of growing into a frond, and for the seaweed belonging to the genus Amanori where the shell spores grow into a frond When “seed shellfish” is placed horizontally on sand such as tidal flats, it will be installed along with large shells, so that small shells are buried or small shells are In many cases, the fronds do not germinate in the shade, and it is difficult to grow the foliage of the seaweed belonging to the genus Amanori that produces fronds directly from the filamentous bodies in each of the used oysters and scallop shells There was a problem.

  Furthermore, in the seaweed belonging to the genus Amanori, which produces foliate directly from the filamentous body (especially Kaiganaramanori), even if the filamentous body is planted in the whole oyster and scallop shell, it does not germinate from the entire shell, and the tip and periphery of the shell In order to germinate a lot from the part, it has been confirmed by experiments that parts other than the tip and the peripheral part do not function effectively for germination. Since a considerable amount of oysters and scallop shells were required, there was a problem that there was no aquaculture base for laver belonging to the genus Amanori, which produces foliates directly from filamentous bodies per unit area.

  In order to solve the above problems, the following technical means are taken in the present invention.

A culture method for seeding a laver filamentous body belonging to the genus Amanori that directly produces a leaf-like body from the filamentous body of the first invention and growing directly to the leaf-like body has a plurality of protrusions mainly composed of calcium carbonate on the upper surface side. An aquaculture substrate is used.
A culture method for seeding a laver filamentous body belonging to the genus Amanori that directly produces a leaf-like body from the filamentous body of the second invention and growing directly to the leaf-like body has a plurality of protrusions mainly composed of calcium carbonate on the upper surface side. A fish tank filled with seawater that has been chopped by a mixer with a free-form filament of seaweed belonging to the genus Amanori that produces leaf-like bodies directly from the filamentous body using an aquaculture substrate. After sowing on the upper surface side of the culture substrate soaked in the inside and spending about 1 to 10 months to perforate the filaments inside the protrusions and growing them, the upper surface is easy to receive sunlight and low tide It is sometimes installed on sand or rocks that become tidal flats.
According to a third aspect of the invention, in the method for cultivating a nori filamentous body belonging to the genus Amanori that directly produces a leaf-like body and growing it directly to the leaf-like body, the plurality of protrusions are the invention according to claim 1 or claim 2. Processed biological frameworks and fossils based on calcium carbonate are used.

According to 1st invention, the culture base material of the shape which is easy to germinate over the whole surface of the upper surface side of a culture substrate by providing the several processus | protrusion which has a calcium carbonate as a main component on the upper surface side of a culture substrate. Can be used for aquaculture.
According to the 2nd invention, it is a shape which is easy to germinate over the whole surface of the upper surface side of a culture base material, and at the same time, it can install and culture on sand and rocks with a culture base material.
According to the third invention, in addition to the effects of the first invention or the second invention, the plurality of protrusions are obtained by processing a biological skeleton or fossil containing calcium carbonate as a main component. The fossil has minute pores and gaps that are formed during the growth process, which are formed throughout the skeleton of the organism and all parts of the fossil, so the shell that characterizes the seaweed belonging to the genus Amanori, which produces foliate directly from the filamentous body. It is possible to easily make a porous protrusion shape mainly composed of calcium carbonate, such as the shape of the tip / periphery part, over the entire upper surface side of the aquaculture base material, and form a leaf-like body directly from the filamentous body. It can be set as the culture | cultivation method which increases the ratio which the leaf-like body of the seaweed which belongs to the genus Amanori to germinate increases.

It is a schematic explanatory drawing of the culture base material for laver belonging to the genus Amanori which produces a leaf-like body directly from the filamentous body concerning the present invention. It is a schematic explanatory drawing of the base of the Example which concerns on this invention. It is a schematic explanatory drawing of the culture base material for nori which belongs to the genus Amanori which produces a leaf-like body directly from the filamentous body of another Example which concerns on this invention. It is a schematic explanatory drawing of the culture base material for nori which belongs to the genus Amanori which produces a leaf-like body directly from the filamentous body of another Example which concerns on this invention. It is a schematic explanatory drawing of another Example of the base which concerns on this invention.

  A mode for carrying out the invention will be specifically described with reference to FIGS. 1 to 5.

(Outline configuration)
An aquaculture base for laver belonging to the genus Amanori that directly produces foliate from the filamentous body of the present invention (hereinafter abbreviated as aquaculture base) will be described with reference to FIG. 1A is a view of the upper surface side, and FIG. 1B is a cross-sectional view taken along line AA of FIG. In the culture substrate 1, a plurality of protrusions 11 are fixed to the upper surface side of the base 21 by a protrusion fixing material 31. The approximate size of the aquaculture base 1 is set to a mass of about 10 kilograms or less so that a farmer can easily install it alone in a poorly secured place such as a tidal flat. The size is such that it can be manufactured. When mechanization is possible, there is no problem even if the mass is increased. Therefore, the size may be increased in order to increase the efficiency of the installation work.

  The overall appearance of the aquaculture substrate 1 is a substantially rectangular parallelepiped with a small thickness direction so that the aquaculture can be carried out in an integrated manner so that it can be installed on a predetermined tidal flat without any gap. As shown in the top view of FIG. 1A, the shape viewed from above the culture substrate 1 is a rectangle having a ratio of long side to short side of approximately 2 to 1. In addition, if it is a square (square, rectangle), it can be installed without a gap, but the rectangle with a ratio of the long side to the short side of approximately 2 to 1 is installed by changing the direction in the perpendicular direction and combining them. The reason is that it becomes possible, and it is easier to carry than a square.

  As shown in the AA cross-sectional view of FIG. 1 (b), the thickness of the culture substrate 1 is substantially uniform, so that it is not buried in the strength of the culture substrate 1 or the sand of the tidal flat. For a predetermined thickness. For example, the distance from the upper surface of the protrusion fixing member 31 to the bottom surface of the base 21 is about 20 millimeters. In addition, although it describes also in the installation method of the culture base material 1, in order not to be buried in the sand of a tidal flat, since the culture base material 1 may be set | placed on the upper part with a concrete block for construction, a culture base material The thickness of 1 should just satisfy | fill the intensity | strength at the time of conveyance and installation.

(Base)
The base 21 determines the overall shape of the aquaculture base 1 and serves as a base for fixing a plurality of protrusions 11 on which foliate thrives with a protrusion fixing material 31 as one aggregate. The base 21 is integrally molded with a synthetic resin such as a polypropylene resin, a polyethylene resin, or an ABS resin. It is made of synthetic resin because it is cheaper than other materials when it is molded to the required thickness and given the required strength, is light in weight, and is required for the environment in which it is used. This is because they have a certain degree of salt water resistance.

  The base 21 has a H-shaped cross section (see FIG. 1B) and has a box shape having openings in the top surface direction and the bottom surface direction. This will be described with reference to FIG. FIG. 2 is a diagram in which the front right corner is cut out to make the shape of the base 21 easier to understand. The base 21 is formed in a box shape by raising four frame plates 22a, 22b, 22c and 22d above the bottom plate 23 in the center. The upper surface side of the bottom plate 23 is provided with a small recess or the like when the surface is molded smoothly according to the type of adhesiveness of the projection fixing material 31 so that the adhesion to the projection fixing material 31 is improved. The surface may be roughened.

  The reason why the frame plates 22a, 22b, 22c, and 22d are provided is to allow the protrusion 11 and the protrusion fixing material 31 to be easily placed on the upper surface side of the base 21. The bottom plate 23 has four leg plates 24a, 24b, 24c, and 24d extending downward. The reason why the leg plates 24a, 24b, 24c, and 24d are provided is to secure a predetermined height because the protrusion 11 placed on the base 21 is not buried in the sand of the tidal flat. In addition, when installing the culture base 1 on the basis of the concrete block for building as mentioned above, the thing without the leg plates 24a, 24b, 24c, 24d may be sufficient.

  A total of eight air vent holes 25 are provided on each surface at the corners where the leg plates 24a, 24b, 24c, 24d and the bottom plate 23 meet. This is to prevent air from accumulating below the bottom plate 23 and the culture substrate 1 from being easily moved by the influence of waves due to buoyancy when the culture substrate 1 is submerged in seawater. In addition, when the lower central part of the leg plates 24a, 24b, 24c, 24d is cut out in an arch shape, or when the leg plates 24a, 24b, 24c, 24d are not formed in a plate shape but in a column shape, the air vent hole 25 is formed. It becomes unnecessary.

(Projection)
The protrusion 11 is obtained by crushing a coral, which is one of biological skeletons and fossils mainly composed of calcium carbonate, to a predetermined size (about 25 millimeters). Corals crushed to about 25 millimeters often have a cylindrical shape or a conical shape, and in FIG. 1, the crushed corals are represented as cylindrical projections 11 for simplification of expression.

  The coral of the protrusion 11 is a coral skeleton and is generally distributed for the purpose of purifying water in the aquarium. Since the skeleton of coral insects is calcareous, the main component is calcium carbonate, and since it is derived from living organisms, it has fine holes and gaps generated by the growth process in all parts of the projections 11. . In addition, in the Example, although the protrusion 11 is demonstrated as a coral, the shell, limestone, calcite, etc. which correspond to the skeleton and fossil of the organism which have calcium carbonate as a main component are crushed to an appropriate size. It may be used. Shells, limestone, calcite, and the like are also derived from living organisms, and therefore have fine holes and gaps generated by the growth process, similar to corals.

(Projection fixing material)
The protrusion fixing material 31 is used to uniformly arrange and fix the protrusions 11 on the upper surface of the base 21 and is made of cement, plaster, adhesive, or the like. The protrusion fixing material 31 is cured by being left in the air, and the plurality of protrusions 11 are formed into a single plate and are also bonded to the base 21. If the protrusion fixing material 31 is liquid according to its properties, it is applied to the upper surface side of the bottom plate 23 of the base 21, and a paste of fluid such as cement that requires a predetermined thickness is used for the base 21. The protrusion fixing material 31 is used in such an amount that more than half of the surface area of the protrusion 11 is exposed to the outside on the upper surface side of the bottom plate 23. In addition, when using the thing which mixed fine sand with the compound of magnesium hydroxide and calcium to the projection fixing material 31 and added water and kneaded, it hardens not only in the air but also in the water, Since it also has an adhesive capability, the protrusion 11 may be fixed to the upper surface of the base 21 using the protrusion fixing material 31 in water as necessary.

(Production method)
The method for producing the culture substrate 1 is to apply the projection fixing material 31 evenly on the upper surface side of the bottom plate 23 of the base 21, and apply the projection fixing material 31 to the upper surface side of the bottom plate 23 of the base 21. If it is a fluid, it is poured. The protrusion 11 is uniformly arranged on the base 21 on which the protrusion fixing material 31 is applied or poured so that the entire upper surface side of the bottom plate 23 of the base 21 is covered. The rate at which the plurality of protrusions 11 protrude is about 10 to 50 per 100 square centimeters. The aquaculture substrate 1 is completed after waiting for (curing) the curing of the projection fixing material 31.

(how to use)
The use method of the culture substrate 1 is a state in which a free filamentous body of laver belonging to the genus Amanori that produces a leaf-like body directly from the filamentous body is shredded with a mixer, or a fruit spores dropped from the leaf-like body are filled with seawater. After sowing on the upper surface side of the culture substrate 1 soaked in an aquarium, it takes about 1 to 10 months to pierce and grow the filamentous bodies inside the projections 11, and then the sand that becomes a tidal flat at low tide Install on the rock. In this case, in order to grow the laver belonging to the genus Amanori that directly produces a leaf-like body from the filamentous body, it is necessary to receive sunlight and to perform photosynthesis, so that the upper surface of the culture substrate 1 is likely to receive sunlight. Need to put. Also, in places where the culture substrate 1 is installed with a lot of sand and mud and sand etc. is easy to move due to the flow of the ocean current, etc. Install the anchor pile so that it does not move. Moreover, when an installation place is unstable in a rocky place, it installs so that the culture base material 1 may be stabilized using a concrete block for construction as a foundation. After that, laver belonging to the genus Amanori that produces foliate directly from the filamentous body from the outer surface of the protrusion 11 germinates, and when left in the state of being installed for about 2 to 3 months, it belongs to the genus Amanori that produces foliate directly from the filamentous body. A laver frond grows over the entire outer surface of the protrusion 11.

(Outline configuration)
The culture substrate 2 of Example 2 is obtained by replacing the protrusions 11 of the culture substrate 1 of Example 1 with protrusions 12, and the same components are denoted by the same reference numerals and description thereof is omitted. The aquaculture base material 2 is demonstrated using FIG. 3A is a view of the upper surface side, and FIG. 3B is a cross-sectional view taken along line AA in FIG. As shown in the top view of FIG. 3A, the culture substrate 2 has a plurality of protrusions 12 fixed to the upper surface side of the base 21 with protrusion fixing members 31. Since the base 21 is the same as that of the first embodiment as shown in the AA cross-sectional view of FIG. 3B, the size of the culture substrate 2 is also substantially the same.

(Projection)
The protrusion 12 is obtained by crushing coral into a predetermined size (about 10 millimeters or less). Since the coral crushed to about 10 millimeters or less is almost granular, in FIG. 3, the crushed coral is represented as a spherical protrusion 12 for the sake of simplicity of expression. The coral of the protrusion 12 is a skeleton of a coral insect and is generally distributed for the purpose of purifying water in the aquarium. Since the skeleton of coral insects is calcareous, the main component is calcium carbonate, and if it is biologically derived calcium carbonate, it has fine pores and gaps. In the examples, the protrusions 12 are described as corals, but shells, limestones, calcite, etc. corresponding to biological skeletons and fossils mainly composed of calcium carbonate are crushed to an appropriate size. It may be used. Shells, limestone, calcite, and the like are also derived from living organisms, and therefore have fine holes and gaps generated by the growth process, similar to corals.

  Since the manufacturing method and the usage method are the same as those in the first embodiment, the description thereof is omitted. In addition, since the protrusion 12 becomes granular, the ratio at which the plurality of protrusions 12 protrude is about 50 to 2500 per 100 square centimeters.

(Outline configuration)
The culture substrate 3 of Example 3 is obtained by integrating the protrusions 11 and the protrusion fixing material 31 of the culture substrate 1 of Example 1 into a plate 13 with protrusions. The same components as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted. The culture substrate 3 will be described with reference to FIG. 4A is a view of the upper surface side, and FIG. 4B is a cross-sectional view taken along line AA in FIG. As shown in the top view of FIG. 4A, the culture substrate 3 is provided with a single plate 13 with projections on which a plurality of projections are formed on the upper surface side of the base 21. Since the base 21 is the same as that of the first embodiment as shown in the AA cross-sectional view of the cultured base 3 in FIG. 4B, the size of the cultured base 3 is substantially the same.

(Projection plate)
The plate 13 with protrusions is made by adding a caking agent to a powdered or granular form of a coral, shell, limestone, calcite, etc., which is a biological skeleton or fossil containing calcium carbonate as a main component. It is a thing. Mix coral, shells, limestone, calcite, etc. in powder or granulate with a suitable amount of cement or gypsum as a caking additive, knead with water and paste into a paste. Prepare a female mold that is provided with a dent to form a protruding shape and is equal to or slightly smaller than the area of the upper side of the bottom plate 23 of the base 21, and pour a paste of a mixture such as coral into the female mold. By molding. By removing the projection-attached plate 13 from the female mold, a plate-like projection-attached plate 13 provided with projections such that a plurality of ridges 13a and a plurality of valleys 13b are orthogonal to the longitudinal direction on the upper surface side. Is molded.

  The cultured substrate 3 is completed by placing the molded projection-equipped plate 13 on the upper side of the bottom plate 23 of the base 21. If it is necessary to bond the protrusion-equipped plate 13 and the base 21, the protrusion-fixing material 31 is placed on the top surface of the base 21. In addition, as another molding method of the plate 13 with protrusions, water is added to a mixture of coral or the like made into powder or granules, cement or the like as a caking additive, and kneaded into a paste. A plurality of ridges 13 a and a plurality of valleys 13 b are perpendicular to the longitudinal direction of the plate 13 with protrusions on the upper surface side of the plate 13 with protrusions after being poured into the upper surface side of the bottom plate 23 of the base 21 and cured to some extent. You may shape | mold using a spatula etc. In the embodiment, an example in which the protrusion shape of the plate with protrusions 13 is formed in a wavy shape or a polygonal line shape is shown. However, the purpose is to provide a plurality of protrusions, and the protrusion-like shape is similar to that in the second embodiment. You may shape | mold into a processus | protrusion and a linear or grid | lattice-like process.

  As for the manufacturing method, since most of the manufacturing methods of the board 13 with protrusions are the description, the description is omitted. Moreover, since it is the same as that of Example 1 about the usage method, description is abbreviate | omitted. In addition, about the board 13 with a protrusion, since it becomes plate shape itself, without using the base 21, it installs directly on the sand and rock which become a tidal flat at low tide, and puts the concrete block for construction under. It may be possible to install by such a method of use.

(About other implementation methods of the base)
The material of the base 21 is made of synthetic resin, but in consideration of durability, it may be made of metal such as stainless steel or titanium steel having salt water resistance, or may be molded and fired from silica-based clay. good.

  Another embodiment of the base 21 will be described using a base 21a in FIG. Anchor piles on the outer surface side of the rising frame plates 22a, 22b, 22c, 22d and the leg plates 24a, 24b, 24c, 24d of the base 21a so as not to move by waves or the like when installed on tidal flat sand. There are four anchor attachment portions 26 at appropriate positions.

  Furthermore, in order to be able to connect a plurality of culture substrates to the outer surface side of the rising frame plates 22a, 22b, 22c, 22d and the leg plates 24a, 24b, 24c, 24d of the base 21a, the front side surface (22a, 24a) and the left side surface (22c, 24c) are provided with convex convex connecting portions 27 whose upper part is widened, and the upper side is narrowed on the rear side surface (22b, 24b) and the right side surface (22d, 24d). A concave concave coupling portion 28 is provided. Thereby, the convex connection part 27 is engage | inserted in the concave connection part 28, and a several culture base material can be connected to the vertical direction or a horizontal direction.

1, 2, 3: Culture base 11, 12, Projection 13: Plate with projection 13a: Ridge 13b: Valley 21, 21a: Base 22a, 22b, 22c, 22d: Standing frame plate 23: Bottom plate 24a 24b, 24c, 24d: Leg plate 25: Air vent hole 26: Anchor attachment part 27: Convex connection part 28: Concave connection part 31: Projection fixing material

Claims (3)

  Using a culture substrate with a plurality of protrusions mainly composed of calcium carbonate on the upper surface side, seedling laver filaments belonging to the genus Amanori that directly produce foliate from the filamentous body, and growing directly to the frond body Method.   Using a culture substrate that has a plurality of protrusions mainly composed of calcium carbonate on the upper surface side, a free filamentous body of seaweed that belongs to the genus Amanori that produces a leaf-like body directly from the filamentous body is shredded with a mixer Or, the spores dropped from the fronds are seeded on the upper surface side of the aquaculture substrate immersed in a water tank filled with seawater, and it takes about 1 to 10 months to perforate the filaments inside the projections. After being grown, the top surface is easily exposed to sunlight, and is placed on sand that becomes a tidal flat at low tide, or on a rock, sowing the filamentous body of Nori belonging to the genus Amanori that directly produces a leaf-like body from the filamentous body. An aquaculture method that grows the body.   The plurality of protrusions according to claim 1 or 2 are obtained by processing a filamentous body of laver belonging to the genus Amanori that produces a leaf-like body directly from a filamentous body, which is obtained by processing a biological skeleton or fossil containing calcium carbonate as a main component. A culture method that grows directly to a foliate.

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