JPS59205921A - Algae field constructing method - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] The present invention is a seaweed bed creation method, specifically, actively supplies seaweed shell spores to new seabeds formed by stone throwing and blasting, thereby ensuring that a large amount of shell spores settle on rocky reefs. Concerning an efficient seaweed bed creation method.

Attempts to restore the richness of the ocean by creating seaweed beds in coastal waters have been taken up as a national project, and efforts such as stone throwing and submarine bombing have continued, but the method of sowing seaweed on rocky reefs has not been proven. At this stage, it has not been established that natural seaweed shell spores are stranded 2
They are simply creating a seaweed bed passively in hopes of settling the seaweed.

Recently, there has been a growing trend to actively create seaweed beds by planting seaweed shell spores, and in addition to preparing the seabed, they are spraying frozen ground with gravel, glass beads, ropes, etc. that have germinated seaweed. ,
However, both of these methods involve adjusting the environment during the period when seaweed is easily affected by the external environment from germination to growth into young leaves, and are effective in protecting fish and shellfish. Substantial results have not yet been achieved due to the difficulty of taking into account the damage caused by leaf root feeding by molluscs, etc., and the loss of bud bodies due to washing, movement, and abrasion of the frozen ground body due to currents and waves.

In any case, as mentioned above, seaweed bed creation is an important national project, and its establishment is equally desirable.゛The present invention, in response to the above-mentioned demands, focuses on the active and useful creation of seaweed beds, develops a suitable frozen ground, and prevents the erosion and movement of the frozen ground itself by establishing it. The purpose is to increase the chances of conglomerates settling on reefs.

That is, the features of the present invention include a fiber mesh body;
A seaweed bed is made by attaching a plurality of layers of frozen ground with non-woven fabric to a fiber robe frame at appropriate intervals, and in the first step, seaweed is allowed to grow and grow on the seaweed reef, and then in the second step. In this method, a seaweed reef with epiphytic growth of the seaweed is erected horizontally in a tensioning frame at approximately the same depth as the top of the reef on the ocean floor.

Here, the network forming the frozen ground is nylon.

Synthetic fibers such as vinylon, polypropylene, and cotton.

It is preferable to use fibers such as natural fibers such as linen, etc. On the other hand, it is effective to use a nonwoven fabric in which the above-mentioned fibers are intertwined with each other as constituent fibers to have a large number of delicate voids. These net-like bodies and non-woven fabrics are layered and sutured in at least some parts to form a single piece of frozen ground, but the net-like bodies serve as a direct base for seaweed settlement; The non-woven fabric serves as a protective layer for the root of the leaf body, assists the roots to settle on the reef through the interstices between the fibers, and has the role of preventing damage to the leaf root by fish and the like.

Therefore, the nonwoven fabric fulfills most of its role if healthy seedlings can be obtained, so after the nonwoven fabric is horizontally stretched at approximately the same position as the top of the reef on the ocean floor, secondary buds (shells) are released from the leaf body. In order to expand the range in which the spores can drift, it is preferable to spread them apart as much as possible.

In addition, both the net-like body and the nonwoven fabric have an appropriate size, and are 1.5
The most common one is one with a width of 771 meters and a length of 18 meters, but the separate installation is not limited to this, and the mesh size of the mesh can be selected as appropriate.

Accordingly, the above-mentioned layered bodies of the net-like body and the non-woven fabric are arranged in an appropriate number, usually about 8 pieces, at a required distance from each other within the robe upright frame, and a small float is provided between each layered body. A seaweed reef is formed by holding a floating net with branch ropes, etc., and a large float and an anchor lobe at the tip are attached to a part of each corner of the reef.

In this case, the robe frame is generally made of nylon, vinylon,
It is made of synthetic fiber such as polypropylene, and polypropylene is particularly suitable because of its light specific gravity.

The present invention is to create a seaweed bed using a seaweed reef made of multilayers of a net-like body and a nonwoven fabric as described above.

Figure 1 of the accompanying drawings shows a specific example of the above-mentioned frozen ground. In the figure, (1) is a net-like body, (2) is a non-woven fabric, and (3) is a stitched part, where the net-like body (1) and the non-woven fabric (2) are connected. is the suture part (3
) and (4) integrated into the frozen plain (5
).

Figure 2 shows a seaweed reef with multiple layers of the frozen ground (5).In the figure, the frozen ground (5) is covered with 8 strips at appropriate intervals within the rectangular lobe frame (6). It is connected to a float net (7) equipped with small floats, and connected and attached to the tension frame (6) by a flat rod (4), and the tension frame (6) An anchor (
10) '& The attached anchor lobes (9) are connected to form a seaweed reef (11) with the required spread.

In this case, although the diagram shows eight arrays, the number of frozen fields (5) to be used is selected as appropriate and is not limited to the illustrated example, as described above.

Figures 3 to 5 show each step of the creation method of the present invention for creating a seaweed bed using the above-mentioned seaweed reef, and the specific steps of this creation method will be explained below based on the figures. do.

First, prior to the establishment of seaweed on the seaweed reef in the construction method of the present invention, the seabed is prepared to improve the seabed environment, and stone-throwing,
Various operations such as demolition are carried out. Meanwhile, indoors, Arametsukashime, Ajimo, and Wakame seaweed.

Cultivate the seeds of each type of seaweed, such as kelp.

After completing the above preparations, the cultured seed silk is transferred to the frozen ground.
Approximately 1. ooom) Wrap several strips, for example three strips, in the longitudinal direction of the frozen ground and prepare at sea level.

Figure 3 shows the state of sea surface preparation, in which a seaweed reef (11) with a frozen plain wrapped with seed yarn is anchored at its corner with an anchor, and is floated to sea level 0 → with a float (13). Set up.

When the seed yarn preparation is completed in this way, the first step is to place the seaweed reef (11) at a mid-layer position of about 3 to 4 meters below the sea surface (14) by selecting the appropriate depth for the growth of juveniles according to the seeds. It is possible to grow healthy seedlings with a leaf length of 5 to 10 crn.

In Fig. 4, (15) is the seabed and 06) is the reef.

When the above-mentioned healthy seedlings are obtained, as a second step, the healthy seedlings are placed horizontally with the tension frame at approximately the same position as the top of the reef (16) on the seabed (15), for example, at a position of 1 to 2 m from the seabed (05). The seaweed bed is completed after it is stretched and laid. In addition, at any time,
It is convenient to place a marker α9) above the sea level θ→.

When a seaweed reef is laid out horizontally in this way, a large amount of secondary buds (chlastospores) released from the thallus drift near the reef, greatly increasing the chance of landing on the reef and changing the flow velocity of the nearby water current. This slows down the flow of water and creates a vortex flow, allowing the shell spores to settle on rock reefs and seaweed beds without being dispersed and washed away in different directions.

In this case, the nonwoven fabric that makes up the bed can ensure that the roots are planted on the reef through the gaps between its constituent fibers, and even if these fibers come apart or are lost, the planting is maintained reliably. Such dispersal and loss actually expands the drifting range of the chospores, making them more effective.

Once it is confirmed that sufficient seaweed has grown on the reef, the reef can be removed and reused.

The present invention is a method for creating a seaweed bed using a seaweed reef formed by layering a mesh material and a nonwoven fabric and arranging a bed for placing the mesh as described above. The role of the nonwoven fabric as well as the effect of supporting settlement on the reef through the non-woven fabric makes it possible to grow healthy seedlings easily and efficiently, and also stabilizes the settlement on the reef by horizontally stretching the upper part of the seabed. It also has the remarkable effect of making it possible to place the bed over a wide range, which is incomparable to placing the bed by simply scattering gravel, glass beads, or lobes. Moreover, according to the construction method of the present invention, by selecting the spread of the tension frame, the size of the bed, and the number of beds to be used, it is not only possible to expand the range of seaweed growth on the reef at any time, but also to When used, it has various features such as helping the roots to firmly settle on the reef through the inter-fiber spacing of the interwoven fibers, and expanding the range of sporicidal drift by utilizing the dispersion. By supplementing the creation of seaweed beds by stone throwing and bottom blasting, it is possible to ensure that seaweed grows on rocky reefs, thereby significantly increasing the economic effect.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an example of a bed used in the present invention, FIG. 2 is a plan view showing an example of a seaweed reef using the bed, and FIGS. 3 to 5 are views showing an example of a seaweed reef using the bed. Figure 3 shows each stage of seaweed bed creation. Figure 4 shows the state of preparing seed yarn, and the state of medium-layer tension and healthy seedling growth.
Furthermore, Fig. 5 shows the state in which a seaweed bed has been created at the bottom. (1)...Network, (2)...Nonwoven fabric. (3)... Suture part, (4)... Flat bar. (5)・・・4 beds, (6)・・・・・・
・Rotsub upholstery frame. (11)...Seaweed reef, 04)...Sea surface. (15)・・・-・Undersea, (16)・・
...Rocky reef. 1st day I Potato 2nd day 3rd picture Potato, f picture μ

Claims (1)

[Claims] 1. A seaweed reef is prepared by attaching a plurality of frozen fields made of fiber nets and non-woven fabrics sewn together at appropriate intervals to a fiber lobe upright frame, and then the seaweed is grown and grown in advance. A seaweed bed creation method characterized by laying seaweed beds vertically (stretched horizontally) at a depth approximately equivalent to the top of the reef on the ocean floor.