JPH0143532B2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a seaweed bed creation method, specifically, to actively supply seaweed shell spores to new seabeds formed by stone throwing or blasting, and to ensure 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 sea 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 methods for sowing seaweed on rocky reefs have not yet been established. At the current stage, we are only passively creating seaweed beds in the hope that natural seaweed shell spores will settle and settle.

Recently, there has been a growing trend to actively create seaweed beds with seaweed shell spores, and after preparing the seabed, they are spreading seaweed beds made of gravel, glass beads, ropes, etc. that have germinated seaweed. These methods involve adjusting the environment during the period when seaweed is susceptible to the influence of the external environment, from germination to growth into young leaves, and are used to protect fish, fish, etc. Substantial results have not yet been achieved due to deficiencies that make it difficult to take into account damage caused by leaf root feeding by shellfish, molluscs, etc., or loss of bud bodies due to washing away, movement, or abrasion of the algae bed body due to currents and waves. Not yet.

In any case, as mentioned above, seaweed bed creation is an important national project, and its establishment is equally desirable.

The present invention, in immediate response to the above-mentioned demands, focuses on the active and useful creation of seaweed beds, develops suitable seaweed beds, and by erecting them, prevents the main body of the seaweed bed from being washed away or moved. The purpose is to increase the chances of conglomerate implantation on the plant.

That is, a feature of the present invention is that a plurality of seaweed beds made of fiber nets and nonwoven fabrics sewn together in multiple layers are attached to a fiber rope upright frame at appropriate intervals, and a seaweed bed is placed in a predetermined sea area. Using a seaweed reef stretched over a surface, the first step is to allow seaweed to grow and grow on the seaweed reef, and then, in the second step, the seaweed reef with the seaweed on it is grown in its entirety without being transported. It is located horizontally at the same depth as the top of the reef on the ocean floor.

Here, the net-like body constituting the algae bed is preferably made of fibers such as synthetic fibers such as nylon, vinylon, and polypropylene, or natural fibers such as cotton and hemp. It is effective to use fibers that are intertwined with each other and have a large number of interfiber voids. These net-like bodies and non-woven fabrics are layered and sutured at least in part, forming an integral seaweed bed. It serves as a protective layer for the root of the leaf body, assists the roots to settle on the reef through the interstices of its fibers, and has the role of preventing damage to the leaf root by fish and the like.

Therefore, the non-woven fabric fulfills most of its role if healthy seedlings can be obtained, and after being horizontally stretched at approximately the same position as the top of the reef on the ocean floor, the non-woven fabric will absorb the secondary buds (cholospores) released from the thallus. ), it is preferable to spread them apart as much as possible in order to expand the drifting range.

Note that both the mesh and the nonwoven fabric have appropriate sizes, and the most common one is 1.5 m wide and 18 m long, but there is no particular restriction to this, and
The mesh size of the mesh can also be selected as appropriate.

Therefore, 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 rope tensioning frame, and each layered body is provided with a small float suspended between the layers. A seaweed reef is constructed by holding a floating net with branch ropes and the like on the surface of a designated sea area, and a large float and an anchor rope with an anchor at the tip are attached to each corner of the net. .

In this case, the rope tension frame is generally made of synthetic fibers such as nylon, vinylon, and polypropylene.
In particular, polypropylene is most 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.

FIG. 1 of the accompanying drawings shows a specific example of the above-mentioned algae bed. In the figure, 1 is a net-like body, 2 is a non-woven fabric, and 3 is a sutured part. The net-like body 1 and the non-woven fabric 2 are integrated by a sutured part 3. A hand rod 4 is provided at the end of the seaweed bed 5.

FIG. 2 shows a seaweed reef using a plurality of the above-mentioned seaweed beds 5, in which a rope tension frame 6 formed in a rectangular shape has a
In the figure, eight seaweed beds 5 are arranged at appropriate intervals, connected to a float net 7 equipped with small floats 8, and connected and attached to a tensioning frame 6 with hand rods 4. Anchor ropes 9 with anchors 10 attached to each of the four corners of the frame 6 are connected to form a seaweed reef 11 having a required spread.
In this case, although eight seaweed beds are shown in the figure, the number of seaweed beds 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, before the seaweed grows on the seaweed reef in the creation method of the present invention, the seabed is prepared to improve the seabed environment, and various operations such as stone throwing and blasting are carried out. Meanwhile, indoors, Arame, Kajime, Ajimo, Wakame,
Cultivate the seeds of each type of seaweed, such as kelp.

When the above preparations are completed, the cultured seed silk is made into one seaweed bed (approximately 1000 m long), wound several times, for example three times, in the longitudinal direction of the seaweed bed, and prepared at the sea surface.

FIG. 3 shows the state of such seaweed preparation, in which a seaweed reef 11 with a bed of seaweed wrapped in seed yarn is anchored at a corner of a predetermined sea surface by an anchor, and is floated to the sea surface 14 by a float 13. Set up.

When the seed yarn preparation is completed in this way, as a first step, the seaweed reef 11 is placed at an appropriate depth for juvenile growth depending on the algae species, and as shown in FIG.
Stretch the seedlings in the mid-layer position of 1.5 m and grow healthy seedlings with leaf lengths of 5 to 10 cm.

At this time, the length of the depth adjustment net 17 with a weight 18 attached to the lower end is adjusted to adjust the tensioning depth, but as mentioned above, the net-like body serves as a direct base for seaweed settlement, and the nonwoven fabric It serves as a protective layer for the roots and prevents damage to the leaves and roots by fish, making it easy to grow healthy seedlings.

In addition, in FIG. 4, 15 is the seabed and 16 is a reef.

When the above-mentioned healthy seedlings are obtained, as a second step, the depth adjustment rope 17 is adjusted to place the healthy seedlings together 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 15. The seaweed bed is completed by horizontally laying the seaweed. At this time, it is convenient to display a sign 19 on the sea surface 14 at any time.

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 and creates eddy currents, allowing the schistospores to settle on rock reefs and seaweed beds without being dispersed in different directions.

In this case, the nonwoven fabric constituting the algae bed can ensure that the roots are attached to the reef through the gaps between its constituent fibers, and even if these fibers come apart or are lost, the attachment is reliably maintained. Moreover, such dispersal and loss actually expands the drifting range of the chospores, making them even 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 of creating a seaweed bed using a seaweed reef formed by arranging a seaweed bed in which a net-like material and a non-woven fabric are layered as described above. The role of a protective layer and the effect of promoting settlement on the reef through the non-woven fabric combine to make it possible to easily and efficiently grow healthy seedlings, and also to ensure stable and stable settlement on the reef due to the horizontal spreading on the upper seabed. It has the remarkable effect of making it possible to settle over a wide area, which is incomparable to beds made by simply scattering gravel, glass beads, or ropes. Moreover, according to the construction method of the present invention, by selecting the spread of the erected frame, the size of the seaweed bed, and the number of seaweed beds used, it is possible not only to expand the range of seaweed growth on the reef at any time, but also to use non-woven fabrics. It has various features such as assisting the roots to firmly settle on the reef through the interfiber voids of the interlaced fibers, and expanding the drifting range of the schistospores by utilizing the dispersion. By adding this method to the creation of seaweed beds by blasting, it is possible to ensure that seaweed grows on rocky reefs, thereby significantly increasing the economic effect.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an example of a seaweed bed used in the present invention, FIG. 2 is a plan view showing an example of a seaweed reef using the seaweed bed, and FIGS. The process of creating a seaweed bed using a seaweed bed is shown in Figure 3, which shows the state of seaweed bed established at sea level and seed yarn preparation, Figure 4, which shows the state of established middle layer and healthy seedling growth, and Figure 5, which shows the state of established seaweed bed at the bottom. The status of seaweed bed creation is shown. 1... Net-like body, 2... Non-woven fabric, 3... Suture part,
4...hand stick, 5...weed bed, 6...rope upright frame, 11...seaweed reef, 14...sea surface, 15...bottom floor, 16...rock reef.

Claims (1)

[Claims] 1. A seaweed reef made by attaching a plurality of seaweed beds made of fiber nets and non-woven fabrics sewn together at appropriate intervals to a fiber rope upright frame is erected in a designated sea area and seaweed is preliminarily attached to it. A method for creating a seaweed bed, which is characterized in that the seaweed reef is allowed to flourish, and then the seaweed reef is stretched and laid in a horizontal direction at a position approximately at the same depth as the top of the reef on the seabed in a tensioning frame, without transporting the seaweed reef.