JP2014093967A - Organism cultivation block and organism cultivation method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To create an environment, in a sea, a beach, a river or a vicinity of a river bank, that retains objects for generating iron humate or humic acid effective for cultivating algae and is suited to proliferation of organisms.SOLUTION: An organism cultivation block includes: a block body 1 formed from a porous cement hardened body having a continuous void therein; a storage part 2 that is a space formed inside the block body 1 and communicated to an external surface of the block body 1; and an organism cultivation additive material 4 to be stored in the storage part 2. The organism cultivation additive material 4 used may be an object formed by enclosing a material that is formed by blending humic soil and iron, in a bag body formed of a water-permeable material. The external surface of the block body 1 may be provided with inhabitation holes 3. Preferably, the bore diameter of the inhabitation hole 3 is formed gradually smaller, as it heads toward the depth direction, and communication holes 5 opened to the external surface of the block body may be connected thereto.

Description

  The present invention relates to a biological breeding block and a biological breeding method for forming an environment suitable for the habitat of organisms such as microorganisms, small animals, plants, etc. in the sea, coast, river, riverbank, etc., and promoting the reproduction of these organisms It is about.

  In recent years, from the viewpoint of nature conservation, the coast or the vicinity of the riverside has been made an environment suitable for the habitat of organisms such as microorganisms, small animals, plants, etc., and the reproduction of these organisms has been promoted and the natural environment has been improved by these organisms. For this purpose, attempts have been made to install biological breeding blocks on the coasts and rivers.

  Originally, in concrete blocks, it is impossible for organisms to enter inside, and it is also difficult to attach or stay on the surface, so it cannot be said that it is suitable for the habitat of organisms in the sea or underwater. Therefore, a hardened porous cement having continuous voids therein has been proposed as a material suitable for a biological growth block (see, for example, Patent Document 1). If a block is formed with such a hardened porous cement, a living organism can enter the block, and the living organism can easily adhere to or stay on the block surface.

  By the way, in order to attach various organisms that inhabit the sea and water, and to allow microorganisms and small animals to inhabit the inside, the block material must have an appropriate content of iron element. There exists a thing disclosed by patent document 2 as a cement hardening body. In the hardened cement body disclosed in Patent Document 2, by using an iron-based aggregate having a high specific gravity, a hardened cement body having continuous voids with a high specific gravity is created, and adhesion of seaweeds is promoted. It is possible to provide a habitat for diverse organisms, including the development of

JP-A-9-221371 Japanese Patent No. 3037890

  However, in the hardened cement body described in Patent Document 2 described above, when iron is eluted and becomes iron oxide, the iron oxide settles, and the iron in the coarse aggregate disappears, and the algae due to iron There is a problem that the field training function is lost. In addition, divalent iron ions are generated at the beginning of rusting, which immediately oxidizes to iron oxide and is not effective for algae growth.

  Therefore, the present invention solves the above-mentioned problems, and retains humic acid iron or “substance and iron content that produce humic acid” effective for algae growth over a long period of time. It is an object to be solved to provide a biological breeding block and a biological breeding method capable of creating an environment suitable for breeding organisms in the vicinity or in the vicinity of a river or a riverbank.

  In order to solve the above problems, the present invention is a block body formed of a hardened porous cement body having a continuous void inside, and a space formed inside the block body, through the continuous void, A storage unit communicating with the outer surface of the block main body, and an additive for biological growth stored in the storage unit are provided.

And the other form of this invention is the biological growth method using the block for biological growth laid in the sea or underwater,
The body of the biological growth block is formed of a porous cement cured body having continuous voids therein, and the housing is a space communicating with the outer surface of the block body through the continuous voids inside the block body Set up a section,
The biological growth block is submerged in the sea or water, and the biological growth additive is stored in the storage portion.

  According to these present invention, by having continuous voids, microorganisms can enter the block, and algae and the like can easily adhere to or stay on the block surface and are stored in the storage unit. Nutrients from the additive for biological growth can be supplied through the continuous voids to promote biological growth. More specifically, the block main body is formed of a porous cement hardened body such as porous concrete having a porosity of 15% or more, and an additive for biological growth necessary for formation of algae and seafood in the storage section. Since the additive for biological growth in the storage part diffuses from the inside to the outside through the continuous gap or opening of the storage part, the roots of plants such as seaweed are good, and nematodes and plankton are Becomes a space to settle. Moreover, when the additive for biological growth is consumed, it can be replenished to the storage unit, and the biological growth environment can be maintained. Furthermore, as the porous cement hardened body, porous concrete using recycled aggregate as aggregate can be used, so that the use of recycled aggregate generated from waste concrete can be expanded and contribute to environmental protection.

  In the above invention, it is preferable that the additive for biological growth is formed by encapsulating iron humate or a material containing “a substance that generates humic acid and iron” in a bag formed of a water-permeable material. . In this case, the humic acid iron or the substance that produces humic acid and the iron content can be held in the storage portion for a long time by the bag, and an environment suitable for the propagation of the organism can be created. In addition, examples of the “substance generating humic acid” include humus soil, wood chip, defoliation, waste wood, and felled wood chip, and examples of iron include waste rebar, rebar, iron ball, and sand iron. . As the “bag body”, a resin container such as a porous plastic or vinyl can be used in addition to those formed from a fiber-based material such as a hemp bag or a soil bag.

  In the above-mentioned invention, it is preferable to have a swell hole drilled in the outer surface of the block body. In this case, by providing a horizontal hole as a hole for suffocation, it can be used as a place for fish, and organisms such as fish can be collected. Furthermore, the hole for habitation can reduce the pressure of the wave which arises in a fishing reef, and prevents the block main body from sliding and falling in the sea. Here, “drilling” refers to forming a hole that penetrates from one side of the block body to the opposite side, in addition to forming a hole that does not penetrate to the opposite side of the block body, such as a recess or groove. If you want to.

  In the above invention, the swell hole is preferably formed such that its inner diameter is small in the depth direction, and further, a flow hole opening on the outer surface of the block body is preferably communicated. In this case, the water pressure and the wave pressure that collide with the breathing hole can be increased in the depth direction by making the breathing hole a lateral hole that is narrowed toward the back. In addition, by providing a flow hole that leads from the inside of the breathing hole to the outside, it is possible to generate a flow from the breathing hole to the outside and a vortex flow near the opening of each hole. The organisms that are attached to the seaweeds and the seaweeds can be brought up into the sea and water, and it can be expected that the organisms that prey on them will gather.

  In the above invention, it is preferable that the breathing hole is communicated with the storage portion inside the block main body. In this case, nutrients such as iron humate produced by the biological growth additive in the storage section can be sent directly to the stagnation hole, and the growth of organisms such as algae and plankton in the swell hole can be more reliably performed. It can be promoted, and fish and other organisms can be collected.

  In the above invention, the block main body can be divided into a plurality of unit block bodies, and a groove portion is formed on a side surface of the unit block body at a position in contact with another adjacent unit block body. It is preferable that the groove portions of adjacent unit blocks are brought into contact with each other. In this case, simply by providing a groove on the side surface of the unit block body, it is possible to form a swell hole when the unit blocks are stacked, compared to the case where a swell hole is drilled in the block body. Work can be made easy.

  As described above, according to the present invention, the humic acid iron or “humic acid-producing substance and iron content” effective for the growth of algae can be retained over a long period of time in the block body and its surroundings. It is possible to create an environment suitable for the breeding of organisms in the vicinity of the coast or in the vicinity of rivers and riverbanks.

It is a perspective view which shows the whole structure of the biological growth block which concerns on 1st Embodiment. It is a perspective view which shows the whole structure of the block for biological cultivation which concerns on the example of a change of 1st Embodiment. It is a perspective view which shows the whole structure of the block for biological cultivation which concerns on 2nd Embodiment. It is a figure which shows the whole structure of the block for biological growth which concerns on 2nd Embodiment, (a) is a top view, (b) is a front view, (c) is a side view. It is a figure which shows the whole structure of the block for biological cultivation which concerns on 3rd Embodiment, (a) is a top view, (b) And (c) is the side view. It is a figure which shows the whole structure of the biological cultivation block which concerns on 3rd Embodiment, (a) is a top view which shows only a cover body, (b) is AA sectional drawing shown in FIG. . It is explanatory drawing which shows the outline | summary of the marine test which is an Example. It is an underwater photograph which shows the test result of the ocean test (specimen which concerns on this invention) which is an Example. It is an underwater photograph which shows the test result of the marine test which is an Example (specimen by the comparison concrete).

[First Embodiment]
Hereinafter, a first embodiment of a biological growth block and a biological growth method according to the present invention will be described in detail with reference to the accompanying drawings. Fig.1 (a) is a perspective view which shows the whole structure of the block for biological growth which concerns on this embodiment, (b) is an enlarged view of the porous cement hardening body which comprises the block for biological growth, c) is a cross-sectional view of a biological breeding block.

(Biological building blocks)
As shown in FIG. 1 (a), a biological breeding block 100 according to this embodiment is a so-called fishing reef block, and a housing portion 2 is provided inside the block body 1, and the outer surface of the block body 1. Have a number of breathing holes 3.

  The block body 1 is a rectangular concrete block. As shown in FIG. 1B, a porous cement having continuous voids formed by communicating voids between aggregates inside the concrete block. It is formed of a cured body. As the material of the block main body 1, a porous cement hardened body such as porous concrete having a porosity of 15% or more is used, and the aggregate of the porous cement hardened body is a recycled aggregate generated from waste concrete. Porous concrete blended with can be used.

  The storage unit 2 is a space formed inside the block body 1 and communicating with the outer surface of the block body 1, and the biological growth additive 4 is stored in the storage unit 2. In the present embodiment, the storage portion 2 has a bottomed cylindrical shape, but the block body 1 may be vertically penetrated. In addition, as shown in FIG.1 (c), the continuous space | gap of a porous cement hardening body exists in the concrete part of the block main body 1 without a crack, and from the inner side of the accommodating part 2 or the hole 3 for swell, the block main body 1 In addition to communicating with the outer surface, the storage portion 2 and the breathing hole 3 are communicated with each other.

  In the present embodiment, a lid 22 for closing the upper opening of the storage unit 2 is attached to the storage unit 2. The lid body 22 is formed of, for example, porous concrete or the like, and is formed into a tapered shape downward or is provided with a stepped portion so as to be fitted into the upper opening of the storage portion. Yes.

  The biological growth additive 4 is humic acid iron or “humic acid-producing substance and iron content”. For example, a material containing wood chip and iron is enclosed in a bag made of a water-permeable material. Configured. Specifically, examples of substances that generate humic acid include humus soil, thinned wood chips, fallen leaves, waste wood, and cutting chips, and examples of iron include waste steel bars, reinforcing bars, steel balls, and iron sand. It is done. Here, iron humate is iron combined with an organic substance such as fulvic acid, and has a structure in which an iron atom is sandwiched between functional groups such as a carboxyl group and a carbonyl group, and is a water-soluble substance. In addition, dead leaves and fallen leaves are left in the sea or water to decompose and cause fermentation and chemical reactions, producing tannic acid, tartaric acid, and amino acids. Iron ions generated from corrosion of iron and iron ions from already oxidized iron oxide are produced to produce iron humate containing iron complexes. This iron humate can supply iron in a form that is easily absorbed by living organisms, and promotes the growth of living organisms.

  Moreover, as a bag body, as shown to 40 of FIG. 1 (a), in addition to what was formed from fiber-type raw materials, such as a hemp bag and a soil bag, as shown to 41 of FIG. Many plastic containers such as plastic and vinyl can also be used. In addition, these fiber materials and resin containers may be materials that are decomposed in the sea or water.

  The breathing hole 3 is a hole formed in the outer surface of the block main body 1 and serving as a place for living creatures such as fish. In this embodiment, the inner diameter of the hole 3 is made smaller in the depth direction. It has a shape and a pyramid shape. In addition, in this embodiment, as for the hole 3 for swell, as shown also in FIG. 1, in addition to the case of forming a hole that does not penetrate to the opposite side of the block body 1, such as a recess or a groove, the block body The case of forming a hole penetrating from one side surface to the opposite side surface is included. In addition, as a method for forming the hole 3 for swell, a conical mold may be used when the block body 1 is molded with a mold, and drilling is performed after the block body 1 is cured. May be. The shape of the breathing hole 3 is not limited to the above-described conical shape or pyramid shape as long as the diameter decreases in the depth direction, and may be another polygonal pyramid shape or a multistage shape.

  In addition, as an example of the change of the hole 3 for breathing, the circulation hole 5 opened to the outer surface of the block main body 1 may be communicated from the hole 3 for breathing like the biological growth block 200 shown in FIG. . In this case, the water pressure and the wave pressure that collide with the breathing hole can be increased in the depth direction by making the breathing hole a lateral hole that is narrowed toward the back. In addition, by providing a flow hole that leads from the inside of the breathing hole to the outside, it is possible to generate a flow from the breathing hole to the outside and a vortex flow near the opening of each hole. The organisms attached to the seaweeds and the seaweeds can be brought up in the sea and water, and the organisms that prey on them can be expected to gather.

(Biological breeding method)
By using the biological growth block 100 (or 200) having the above configuration, the biological growth method of the present invention can be carried out. First, a porous cement hardened body such as porous concrete having a porosity of 15% or more (in this embodiment, 21% to 30%) and a compressive strength of 10 N /? Or more (in this embodiment, 12 N /?) A block body 1 is formed. As the aggregate of the hardened porous cement, porous concrete using recycled aggregate can be used, and recycled aggregate generated from waste concrete can be used effectively. Since the strength may be lowered due to the influence of the additive, the water binder ratio is set to about 24% and the porosity is secured to about 25%.

  At this time, the housing portion 2 communicating with the outer surface of the block body 1 is formed inside the block body 1, and the swell hole 3 is formed in the side portion of the block body 1. As a method of forming the storage portion 2 and the swell hole 3, the block main body 1 may be extracted with a cylindrical or conical mold when the block main body 1 is formed with a mold, and the block main body 1 is cured. You may drill with a drill etc. later.

  Then, the biological growth block 100 manufactured in this way is submerged in the sea or water, and the biological growth additive 4 is stored in the storage portion 2. As a method for the laying, the biological growing additive 100 may be stored in the storage unit 2 after the biological growing block 100 is previously set in the sea or underwater. The biological growth additive 4 may be stored in the storage unit 2 of the block 100, and the biological growth block 100 may be submerged in the sea or water in that state.

  Moreover, after the nutrient in the biological growth additive 4 is eluted, it is periodically replaced or supplemented. The replacement / replenishment method includes removing a residue of the biological growth additive 4 in the storage unit 2 of the biological growth block 100 by underwater work, and then adding a new biological growth additive 4. refill.

(Action / Effect)
According to the present embodiment described above, by having the continuous voids, microorganisms can enter the block, and algae and the like can easily adhere to or stay on the block surface, and in the storage unit 2. Nutrients from the stored biological growth additive 4 can spread throughout the block through the continuous gap, and can promote the growth of the organism in or around the block.

  More specifically, the block main body 1 is formed of, for example, a porous cement hardened body such as porous concrete having a porosity of 15% or more, and the living body necessary for seaweed formation and fishery products in the storage unit 2 Since the additive for storage can be stored, the additive for biological growth in the storage unit 2 diffuses from the inside through the opening of the storage unit 2 and the continuous gap, so that the roots of plants such as seaweed on the block surface are good. At the same time, a continuous space rich in nutrients is a suitable space for nematodes and plankton to settle.

  Moreover, when the additive for biological growth is consumed, it can be replenished to the storage unit, and the biological growth environment can be maintained. Furthermore, since porous concrete using recycled aggregate as an aggregate can be used as the hardened porous cement, it is possible to expand the use of recycled aggregate generated from waste concrete and contribute to environmental protection.

  Furthermore, in this embodiment, as an additive for biological growth, a material containing humus soil and iron containing thinned wood chips and waste reinforcing bars is used, and these are made of fiber-based materials such as water-permeable hemp bags and soil bags. Since it is enclosed in a formed bag and used, it can hold humic acid iron or a substance that produces humic acid with humus soil and iron for a long time in the storage part, creating an environment suitable for the propagation of organisms. Can do.

  Moreover, in this embodiment, by providing the horizontal hole as the hole 3 for stagnation on the outer surface of the block body, it can be used as a place where fish live, and further organisms such as fish can be collected. Further, the stagnation hole 3 can also reduce the pressure of waves generated in the fishing reef, and can prevent the block body from sliding and falling in the sea. In particular, since the inner diameter of the breathing hole 3 has a conical shape that is formed smaller in the depth direction, the water pressure and wave pressure that collide with the breathing hole can be increased in the depth direction. By increasing the pressure in the hole 3, microorganisms living in a continuous space communicating with the hole 3 can be ejected from the entire block surface to be swung up to the surroundings. At the same time, the dead bodies of microorganisms remaining in the gap can be ejected out of the gap to prevent the gap from being blocked, maintain the gap, and have a self-cleaning action.

  Furthermore, by providing a flow hole 5 that leads from the inside of the swell hole 3 to the outside, it is possible to generate a flow from the swell hole 3 to the outside and a vortex near the opening of each hole. It is possible to expect living organisms that prey on microorganisms that are inhabiting and that are attached to seaweeds into the sea and underwater, and that prey on them.

[Second Embodiment]
Next, a second embodiment of the present invention will be described. The gist of the present embodiment is that, in addition to the swell hole 3 in the first embodiment described above, a communication swell hole 30 in which the shape and structure are changed is further provided. In the present embodiment, the same components as those in the first embodiment described above are denoted by the same reference numerals, and the functions and the like are the same unless otherwise specified, and the description thereof is omitted.

  FIG. 3 is a perspective view showing a biological breeding block 300 according to the second embodiment. FIG. 4 (a) is a top view, FIG. 4 (b) is a front view, and FIG. 4 (c) is a side view. It is. As shown in the figure, the communication breathing hole 30 is a large breathing hole communicated with the storage portion 2 provided in the lower part of the block body 1, is a concave portion with a shallow angle, and has a gentle conical shape. The widened portion 31 is formed, an elongated conical hole 32b, and a flow passage 33 communicating with the respiratory hole 32b and the storage portion 2 are provided.

  The breathing holes 32b are disposed on both sides of the storage portion 2 near the bottom surface of the block body 1. The breathing hole 32b is a hole penetrating from the one side surface of the block main body 1 to the opposite side surface, and from the large-diameter hole 32a formed in the center of the expanding portion 31 to the opposite side surface. The small-diameter hole 32c is connected to the small-diameter hole 32c, and the small-diameter hole 32c is formed so that its inner diameter decreases in the depth direction. Further, in the middle of the breathing hole 32b, the flow passage 33 communicates with the lower part of the storage portion 2.

  Moreover, in this embodiment, the accommodating part 2 is penetrated up and down of the block main body 1, and is blocked | closed by the bottom plate 21 fitted by the opening part of the bottom part side from the downward direction. When the biological growth additive 4 is stored in the storage part 2, the biological growth additive 4 may be introduced from the upper opening after the bottom of the block body 1 is closed by the bottom plate 21, or the lower opening. After the biological growth additive 4 is pushed in, the bottom plate 21 may close the bottom.

  According to such a biological growing block 300 according to this embodiment, the provision of the expanding portion 31 makes it easy for fish and the like to enter the inside, and also allows water pressure and wave pressure acting on the fishing reef surface to It can be used to increase the pressure in 32b, and microorganisms living in a continuous space communicating therewith can be ejected from the entire block surface to rise to the surroundings. Of creatures. Furthermore, the expanded portion 31 and the conical hole 32b for respiration can reduce the wave pressure generated on the surface of the fishing reef, and can prevent the block body from sliding and falling in the sea.

  In addition, the nutrients such as iron humate produced from the biological growth additive 4 are directly fed into the respiration hole 32b in the storage unit 2 by the circulation hole 33, and algae, plankton, etc. in the respiration hole 32b are sent. It is possible to promote the growth of organisms more reliably, and to collect organisms such as fish.

  In particular, since the swell hole 32b has a conical shape whose inner diameter is formed smaller in the depth direction, the water pressure and the wave pressure colliding with the swell hole 32b can be increased in the depth direction. And since the hole 32b for breathing has penetrated to the opposite direction, the nutrient supplied in the hole 32b for breathing through the flow hole 5 flows to the outside from the hole 3 for breathing, and the opening part of each hole. The generated eddy current can be diffused around the biological breeding block 300. As a result, it is possible to expect that microorganisms living in the hole for inhalation and organisms adhering to the seaweed can be soared in the sea and water, and organisms that prey on them can gather.

[Third Embodiment]
Next, a third embodiment of the present invention will be described. The gist of the present embodiment is that the block body 1 in the first and second embodiments described above can be divided into a plurality of unit block bodies 10. FIG. 5 is a diagram showing a biological growth block 400 according to the third embodiment. FIG. 5A is a top view, FIG. 5B is a side view, and FIG. 5C is a front view. is there. FIG. 6 is a diagram of a biological breeding block 400 including the lid block 19, FIG. 6A is a top view of the lid block 19, and FIG. 6B is a diagram of FIG. 5A. It is AA sectional drawing.

  The biological breeding block 400 according to this embodiment is also a so-called fishing reef block, and in the same manner as the first embodiment and the second embodiment described above, the storage unit 11 is provided inside, and a large number of the outer surface are provided on the outer surface. A swell hole 13 is provided.

  More specifically, the biological breeding block 400 according to the present embodiment is constructed in a multistage structure in which a plurality of unit blocks 10 are stacked vertically and horizontally, and the uppermost unit block 10 includes the inside thereof. A lid block 19 that closes the upper opening of the storage portion 11 is placed. And the groove part 10a is formed in the side surface of each unit block body 10 in the location which contact | connects another adjacent unit block body 10, and the hole 13 for habituation is made by contact | abutting the groove parts 10a of the adjacent unit block 10 mutually. Is formed.

  The unit block body 10 is formed of a porous cement hardened body having continuous voids in which the voids between the aggregates are formed to communicate with each other inside the concrete block, and the upper and lower sides of the rectangular concrete block. The groove portion 10a is provided on the four sides. Also, as the material of the unit block main body 10, a porous cement hardened body such as porous concrete having a porosity of 15% or more can be used, and the aggregate of the porous cement hardened body is made of waste concrete. Porous concrete blended with the generated recycled aggregate can be used.

  The storage unit 11 is a space that is formed inside the unit block body 10 and communicates with the outer surface of the block body through the continuous gap, and the biological growth additive 40 is stored in the storage unit 11. In this embodiment, the storage portion 11 has a bottomed rectangular shape having an opening in the upper portion, but the block main body 10 may be vertically penetrated. In the present embodiment, the accommodation portion 11 is provided with a communication hole 12 that penetrates the bottom of the block 10. Further, the continuous voids of the hardened porous cement constituting the unit block body 10 are present in the concrete portion of the block main body 10 and communicated from the storage portion 11 to the outer surface of the block main body 10 and the storage portion. 11 and the breathing hole 13 are communicated with each other.

  In the present embodiment, a lid 22 for closing the upper opening of the storage unit 2 is attached to the storage unit 2. The lid body 22 is formed of, for example, porous concrete or the like, and is formed into a tapered shape downward or is provided with a stepped portion so as to be fitted into the upper opening of the storage portion. Yes.

  As in the first embodiment and the second embodiment described above, the biological breeding additive 40 encloses a humic acid iron or a substance that produces humic acid in a bag formed of a water-permeable material. It is configured. In the present embodiment, a fastening member 40a such as a wire or a rope is attached in the storage portion 40, thereby fixing the biological growth additive 40 and preventing it from floating.

  Also in the present embodiment, the swell hole 13 has a conical shape or a pyramid shape whose inner diameter is formed smaller in the depth direction, and a vertical hole 14 communicating with the upper and lower sides is formed. The breathing holes 13 are connected to each other. The vertical holes 14 are also formed by forming fan-shaped grooves at the four corners of each unit block 13 and attaching the grooves of adjacent unit blocks 13 together.

(Action / Effect)
According to the present embodiment described above, as in the first embodiment and the second embodiment described above, by having continuous voids, microorganisms can enter the unit block body 10, and algae and the like can be obtained. The unit block body 10 can easily adhere to or stay on the surface, and the nutrients from the biological growth additive 40 stored in the storage unit 11 spread throughout the block through the continuous gap, and the living organisms in or around the block Can be promoted.

  In particular, in this embodiment, the block main body can be divided into a plurality of unit block bodies 10, and the hole 13 for breathing is formed by bringing the groove portions 10a of the adjacent unit block bodies 10 into contact with each other. When the stool is stacked, the swell hole 13 can be formed, and the manufacturing operation can be facilitated as compared with the case where the swell hole is drilled in the block main body.

  Also in this embodiment, by providing a horizontal hole as a hole 13 for stagnation in the block body, it can be used as a place for fish, and organisms such as fish can be collected. Furthermore, the hole 13 for respiration can also reduce the pressure of the wave which arises in a fishing reef, and can prevent the block main body sliding and falling in the sea.

  The swell hole 13 has a conical shape whose inner diameter is formed smaller in the depth direction, so that the water pressure and wave pressure colliding with the swell hole can be increased in the depth direction, and the swell hole 3 By increasing the pressure inside, the microorganisms living in the continuous space communicating therewith can be ejected from the entire block surface and soar to the surroundings. Further, by providing a flow hole 14 that allows the upper and lower sedation holes 13 to communicate with each other, a flow from the swell hole 13 to the outside and a vortex near the opening of each hole can be generated. It can be expected that microorganisms living in the sea and organisms attached to seaweeds can be brought up in the sea or water, and organisms that prey on them will gather.

  Next, examples of the present invention will be described below. In this example, in the marine test, a specimen (100 mm × 100 mm × 400 mm) having the configuration of the present invention was compared with a specimen formed of ordinary concrete. Specifically, as shown in FIG. 7, each specimen formed in a rectangular shape is suspended from the floating jetty arranged near the sea surface by sea ropes in the sea, and in a certain survey period (13 months). The state of attachment of organisms (algae, microorganisms, etc.) was observed visually and underwater photographs.

  As a test body of the present invention, a block body is formed by hardening a recycled coarse aggregate using ordinary Portland cement as a porous cement hardened body, and a biological growth additive is enclosed in an internal storage portion. Produced. Specifically, as a test piece of the present invention, a block having a diameter of 5 cm is penetrated in the center of the block body to form a storage portion, in which a D13 reinforcing bar having a length of 35 cm, humus and wood chips are enclosed, The storage part was sealed with a lid formed with the same composition. The biological growth additive encapsulated in the storage unit was blended with 140 g in a ratio of 1: 1 by weight of humus and wood chips. On the other hand, as a test specimen for comparison, an ordinary Portland cement was used and a block body was made of plain concrete using river sand and crushed stone as aggregate. Specifically, the block main body was formed of plain concrete having a maximum aggregate size of 20 mm, a slump of 8 + 2.5 cm, and a fine aggregate ratio of 46.1% without providing a storage portion inside.

  The test results are shown in FIGS. FIG. 8 is an underwater photograph showing the test result of the specimen according to the present invention, and FIG. 9 is an underwater photograph showing the test result of the specimen formed of the plain concrete for comparison. As shown in FIG. 8, in the specimen according to the present invention, it was observed that many seaweeds were generated on the surface of the specimen after the test period (13 months) had elapsed. On the other hand, the specimen formed of plain concrete was observed to have almost no algae attached as shown in FIG. Thus, it was verified that the present invention is effective for forming an environment suitable for the propagation of organisms.

DESCRIPTION OF SYMBOLS 1 ... Block main body 2 ... Storage part 3 ... Respiratory hole 4 ... Biological growth additive 5 ... Distribution hole 21 ... Bottom plate 22 ... Cover body 30 ... Communication respiration hole 31 ... Expanding part 32a ... Large diameter hole 32b ... Respiratory Hole 32c ... small-diameter hole 33 ... flow passage 100,200,300 ... biological breeding block

Claims (14)

A block body formed of a hardened porous cement having continuous voids inside;
A space formed inside the block body, the storage part communicating with the outer surface of the block body through the continuous gap;
A biological breeding block comprising: a biological breeding additive housed in the housing section.   The biological growth additive is characterized in that iron humic acid or a material blended with a substance that generates humic acid and iron is enclosed in a bag formed of a water-permeable material. The biological growth block according to 1.   3. The biological growth block according to claim 1, further comprising a hole for breathing formed in an outer surface of the block main body.   The biological growth block according to claim 3, wherein an inner diameter of the breathing hole is formed smaller in the depth direction.   The biological growth block according to claim 3 or 4, wherein a flow hole that opens to an outer surface of the block main body is communicated with the hole for breathing.   The biological growth block according to any one of claims 3 to 5, wherein the breathing hole is communicated with the storage portion inside the block main body. The block body can be divided into a plurality of unit block bodies,
On the side surface of the unit block body, a groove is formed at a location in contact with another adjacent unit block body,
4. The biological growth block according to claim 3, wherein the breathing hole is formed by bringing the groove portions of adjacent unit blocks into contact with each other. A biological breeding method using a biological breeding block set in the sea or water,
The body of the block for biological growth is formed of a porous cement cured body having a continuous void inside, and a storage portion that is a space communicating with the outer surface of the block body through the continuous void inside the block main body Provided,
A biological growth method, wherein the biological growth block is submerged in the sea or water, and the biological growth additive is stored in the storage portion.   The biological growth additive is characterized in that iron humic acid or a material blended with a substance that generates humic acid and iron is enclosed in a bag formed of a water-permeable material. 8. The method for raising a living organism according to 8.   The biological growth method according to claim 8 or 9, wherein a hole for swell is formed in an outer surface of the block main body.   The biological growth method according to claim 10, wherein an inner diameter of the breathing hole is made smaller in the depth direction.   The biological growth method according to claim 10 or 11, wherein a flow hole that opens to an outer surface of the block main body is communicated with the hole for breathing.   The biological growth method according to any one of claims 10 to 12, wherein the breathing hole is communicated with the storage portion inside the block main body. The block body can be divided into a plurality of unit block bodies,
On the side surface of the unit block body, a groove is formed at a location in contact with another adjacent unit block body,
The biological growth method according to claim 10, wherein the breathing hole is formed by bringing the groove portions of adjacent unit blocks into contact with each other.