JPH08214725A - Propagating structure for useful sea weeds in sunk block - Google Patents

Abstract

PURPOSE: To contrive the propagation by adhering of family Laminaria plant and genus Sargassums and by assisting growth, by forming a groove-like depressed part on the surface of a block main body, providing a small groove and installing a propagating material capable of eluting divalent iron, etc., on the depressed part. CONSTITUTION: A groove-like depressed part 16 having a large edge angle part 14 is formed on the surface of a block main body 12 and a comparatively small groove 18 is provided adjacently to the depressed part 16. Further, a propagating material 20 (preferably a platy propagating material formed by mixing a glassy material having iron component containing divalent iron with a cement mortar and curing) capable of eluting divalent iron, etc., on the groove- like depressed part 16 to obtain a propagating structure for useful sea weeds in a sunk block.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a breeding structure of useful seaweeds in sunk blocks, and more particularly, to useful seaweeds growing on sunk blocks such as wave-dissipating blocks installed in shallow waters. The present invention relates to a structure that is preferably used when growing.

[0002]

2. Description of the Related Art Generally, various wave-dissipating blocks such as a multi-legged block such as a tetrapod (trade name) are laid down in a shallow sea area. As a result, the growing seaweeds grow. Marine organisms such as sea urchins, sea turtles, and abalone that feed on this seaweed also attach to the sunk blocks, and the small space created by the blocks and seaweeds is inhabited by microscopic animals such as vallequins and lobsters.
Furthermore, various fishes that feed on these small animals gather.

Therefore, when the setting environment of the block matches the habitat of these plants and animals, a large number of organisms adhere to the setting block, and the effect of the fish reef becomes large. However, in the case of an installed structure for disaster prevention purposes, the place where the wave-dissipating block is laid is too rough as a habitat for these creatures, and the block is large and there is little complicated space. In many cases, it is difficult for organisms to settle, and in order to grow useful seaweeds in such an environment, the blocks are formed by making appropriate surface irregularities, etc. It is the present situation that somehow secures the space.

[0004] By the way, seaweeds generally considered to be useful are large brown algae including a kind of kelp, such as alame, scallop, and kelp, and a honda straw.

In the appressorium of the plants of the kelp family, many fibrous roots are branched into a shape, and the fibrous roots develop so as to wrap around the undulations of the bedrock and fix the leaf body. It is known that the vegetation that grows on large protrusions and ridges is good, and that the cabbage and the like grow on ridges and gentle slopes at the top of blocks. It is known that since the appressorium of the Honduras has many disc-shaped roots and cone-shaped roots, it grows well even when it adheres to a substrate composed of millimeter-order grooves and fine irregularities.

On the other hand, according to a study by Professor Matsunaga of Hokkaido University, the growth of seagrass beds including these seaweeds requires components such as iron, manganese, silicon, and phosphorus dissolved in seawater. In particular, it has been reported that when iron is dissolved as a divalent ion, its proliferation effect is enhanced (Nikkan Masakei Information, January 1, 1988).

[0007]

Therefore, according to the present invention, a groove-shaped recess having a large ridge is formed on the surface of a block body such as a wave-eliminating block, and one or more relatively small grooves are formed adjacent to the groove-shaped recess. By providing a breeding material that elutes divalent iron and the like in the groove-shaped concave portion, a seaweed including useful seaweeds such as a kind of plants such as kelp and a kind of kelp, such as kelp, and a kind of seaweed are provided. It is intended to provide a structure suitable for growth.

In this case, as the breeding material, a plate-like breeding material formed by mixing and hardening a glassy material containing iron containing divalent iron and cement mortar is used. It is preferable to fix the material to the bottom of the groove-like recess with an adhesive or the like.

[0009]

In the structure for growing useful seaweed according to the present invention, the appressor of kelpaceae plants such as lame, scabbard and kelp is provided in the large ridges of the groove-like recesses formed on the surface of the block body and in the grooves of centimeter order. When the groove is firmly set and the groove provided adjacent to the groove-shaped recess is set to the millimeter order, the roughness becomes suitable for Honda straws and the adherend of Honda straws grows. The growth of these useful seaweeds is effectively promoted by trace elements containing divalent iron ions that slowly elute from the propagation material disposed in the groove-shaped recess.

[0010]

Next, as a preferred embodiment of the propagation structure of useful seaweeds in a submerged block or the like according to the present invention, a propagation structure in a multi-legged block such as a tetrapod (trade name) will be exemplified and described in detail below. . The useful seaweed breeding structure according to the present invention is not limited to this embodiment, and can be constructed not only on various wave-dissipating blocks but also on the wall surface of a bank or a seawall. It goes without saying that various design changes can be made without departing from the spirit.

In FIG. 1 to FIG. 3, the structure for growing useful seaweeds according to the present invention is shown in FIG.
2 having a large ridge 14 on the surface, e.g.
and a groove 20 having a width of about 20 cm and a length of about 1.6 m.
A plurality of V-grooves 18 having, for example, a width of about 2 to 3 cm are engraved adjacent to the groove, and further, at the bottom of each groove-shaped concave portion 16, for example, a thickness of 3 cm, a width of 8 cm, and a length of Saga 30
The plate-shaped breeding material 20 set to have a size of about cm is fixed by an adhesive at intervals of about 20 cm.

The plate-like breeding material 20 is a "seaweed bed breeding material" (Japanese Patent Application No. 6-81071) according to the prior application of the present applicant.
In the same way, focusing on glass as an amorphous material different from metal materials and concrete materials, vitreous material containing iron content containing a certain amount or more of divalent iron effective for the growth of seaweed bed organisms including seaweed Is formed into a plate shape by mixing these glassy crushed pieces and cement mortar and curing them, and is generated from divalent iron of the glassy material as the crushed pieces. Ions such as valent iron ions are slowly eluted into the sea over a long period of time.

The groove-shaped recess 16 formed on the surface of the block main body 12 is set according to the size (ton number) of the block main body 12. For example, in the case of a tetrapod (trade name), one shell is used for 16 tons or less. About one per leg,
About 20 tons to 40 tons, about 2 per shell,
Further, for 50 tons or more, it is preferable to provide about three per leg per shell as a guide.

The large ridge 14 of the groove 16 formed on the surface of the block body 12 thus constructed.
And a narrow V-groove 1 provided adjacent to the groove-shaped recess 16.
In FIG. 8, as shown in FIG. 4, the appressor (fibrous root) a of the kelp plant A such as squid, scallop, and kelp firmly set. Further, a narrow V adjacent to the groove-shaped concave portion 16 is formed.
If the groove 18 is further narrowed and formed as a groove or irregularities on the order of several millimeters, as shown in FIG. 4, a sticker (plate-like root, conical root) b of the Honda straw B is formed. The reason why the useful seaweed appressorium is formed in this way is that grooves and recesses are formed in a shape that matches the properties of the appressorium of the kelp and the plant straw. In the part 14, since the accumulation of the mud is small, the juveniles are likely to remain, and the complexity of the shape reduces the damage caused by the algivorous animals. This is because the V-groove 18 makes it difficult for the adhering device to peel off.

[0015] The growth of these Ambaceae plants A and Honda straw B are effective due to trace elements including divalent iron ions slowly released from the plate-like breeding material 20 disposed in the groove-shaped recess 16. Will be encouraged. Marine organisms such as sea urchins, turtles, and abalone that feed on useful seaweeds are attached, and small animals such as creatures and lobsters also live in the complex spaces created by blocks and seaweeds.
Furthermore, various fishes that feed on these micro-animals assemble into a suitable seaweed bed and fish reef in a short period of time.

[0016]

As described above, in the structure for growing useful seaweeds according to the present invention, large ridges and relatively small ridges on the surface of the block body on which lambs, scabbards, and kelpaceae plants easily grow. Grooves and grooves and irregularities on the order of a few millimeters, which makes it easy for Honda straw to grow, are also provided with a breeding material effective for growing seaweed organisms including these seaweeds. Not only effective colonization of Honda straw but also growth by promoting growth can be achieved, and therefore, various advantages such as being able to construct a suitable seaweed bed or fish reef within a short period of time are provided. .

[Brief description of drawings]

FIG. 1 is a perspective view of a multi-legged block provided with a preferred embodiment of a structure for growing useful seaweed in a submerged block according to the present invention.

FIG. 2 is an explanatory plan view of a multiplication structure in the multi-legged block shown in FIG. 1;

FIG. 3 shows X of the multiplication structure in the multi-legged block shown in FIG.
It is an X-ray enlarged sectional explanatory view.

FIG. 4 is an explanatory view corresponding to FIG. 3 showing an epiphytic state of a kelp family plant as a useful seaweed that has grown in the growth structure shown in FIG. 1.

FIG. 5 is an explanatory view corresponding to FIG. 3 in which the V-groove of the multiplication structure shown in FIG. 1 is set on the order of millimeters, and shows a settled state of Honda straw as useful seaweeds that have formed on the V-groove.

[Explanation of symbols]

10 multi-legged block, 12 block body, 1
4 ridge corners, 16 grooved recesses, 18 V grooves,
20 breeding material, A kelp, B
Honda straw,

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kiichi Hirose 2-7 Higashi-nakakanuki-cho, Tsuchiura-shi, Ibaraki Japan Tetrapod Co., Ltd. Applied Hydraulics Research Institute

Claims (2)

[Claims] 1. A block-shaped recess having a large ridge portion is formed on the surface of a block body, and one or more relatively small grooves are provided adjacent to the groove-shaped recess, and the groove-shaped recess is provided with a divalent groove. A growth structure for useful seaweeds in a submerged block, which comprises a growth material that elutes iron and the like. 2. The breeding material comprises a plate-shaped breeding material formed by mixing and hardening a glassy material mixed with iron containing divalent iron and cement mortar, and bonding the plate-shaped breeding material. The structure for growing useful seaweeds in a deposit block according to claim 1, wherein the structure is fixed to the groove-shaped recess with an agent.