JP2000078907A - Marine alga seed and seedling for creating submarine forest and its keeping - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate the supply of a large amount of marine alga seed and seedling and to improve the simpleness of its storage and transportation by finding a seed and seedling form having slight dependence on storage conditions, stabler and simple handleability and excellent shelf stability. SOLUTION: Marine alga seed and seedling for creating a submarine forest is supplied in a state in which the greater part of a foliar part 3 is removed while leaving a growing zone part 4 for reproducing the foliar part so as to improve shelf stability and transport properties of the marine alga seed and seedling. The marine alga may be attached to a transportable supporting substrate of a proper shape. In transplanting the marine alga seed and seedling and creating a submarine forest, the greater part of the foliar part 3 is removed with leaving the growing zone part 4 and the marine alga seed and seedling is stored in this state. In this case, the marine alga can be stored in an unimmersed state in seawater.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seaweed seed and seedling for forming a seaweed bed used for forming a seaweed bed centered on seaweed, and a storage method thereof.

[0002]

2. Description of the Related Art The present applicant has paid attention to the characteristics of a swordfish belonging to the family Laminariaceae as a seaweed seed and seedling suitable for the development of a seaweed bed, and disclosed a technique of forming a seaweed bed using the same (Japanese Patent Application Laid-Open No. 8-322422). JP, JP-A-10-42731,). This tiger alame has excellent characteristics as a seaweed seed and seedling for algae bed creation that is not found in other seaweeds. For example, it has a large ability to adapt to changes in the environment and is extremely effective as a seaweed seedling for development. In addition, since vegetative propagation is possible through the roots, it is possible to create a reliable and permanent seaweed bed. Furthermore, it has an excellent property that storage management of seeds and seedlings on land is incomparably easier than other seaweeds.

[0003] When seaweed beds are created, the environmental conditions and purpose of use vary depending on the region.
It is expected that the type of seaweed to be introduced will be different. In the prior art, on the premise that seaweed seedlings collected or grown in or near the creation sea area are used, efforts have been made to keep them in a more natural state while maintaining their freshness. However, it is customary that there is no natural seaweed that grows in the target sea area where seaweed beds are created and in the vicinity thereof, or even if there is very little, the amount of natural seaweed is very small. It is fully anticipated that there will be cases where a large number of items will be brought. In this case, depending on the storage conditions, many of the leaves may decay depending on the storage conditions, such as during storage of the seaweed for transplantation or during the period from arrival at the construction site until use. Was. And
If the foliage decayed, it was no longer suitable for transplantation and was discarded. In particular, when natural alga bodies that grow naturally on the seabed are collected, the roots of the algal bodies are damaged by peeling off at the time of collection, causing considerable damage to the algal bodies. When the water content decreased, there was a tendency for the rot to rot in a short period of time as compared with a cultured alga body used while being settled on an appropriate supporting substrate. Further, there is still room for study on a method of transporting a large amount of seaweed seedlings without being bulky.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional circumstances, and provides a stable and easy-to-handle seed and seedling form that is less dependent on storage conditions. It is an object of the present invention to facilitate the mass supply of seaweed seeds and seeds and to improve the ease of storage or transportation thereof.

[0005]

In order to solve the above-mentioned problems, various experiments have been carried out. In many seaweeds, when the storage conditions are lowered during the storage process, the leaf-like parts are putrefactive first, It has been found that the stalk migrates to the stalk and eventually rots to the root. In view of the above, in the invention of claim 1, the algal bodies in a state where most of the foliar portions have been removed are supplied as seaweed seedlings for creating algae beds, while leaving the growing zone for regenerating the foliar portions. The technical means of improving the preservability and transportability of the seaweed seedlings was adopted. Here, removing most of the leaf-shaped portion means that in the case where the growth belt portion is present in the leaf-shaped portion, this means that other portions are removed while leaving the growth belt portion, and the removal is performed. The higher the ratio, the less the perishable portion is reduced, the storage stability is improved, and the storage period is extended. However, from the viewpoint of the regeneration of the leaf-shaped portion, the regeneration action is more stable when the remaining portion is increased to some extent, so that the removal ratio is appropriately selected according to the situation. In the case where the growth zone is present on the stalk-like portion side, the entire leaf-like portion may be removed. Therefore, as for the form of the seaweed seedling, the number of bulky leaf-like parts is reduced, and since it is substantially composed of root-like parts and stem-like parts, the volume and weight are greatly reduced. As described above, when applied as seaweed seedlings in seagrass bed development, the perishable leaf-like parts are provided in a form in which most of them are actively removed, leaving the growth zone part which is the starting point of regeneration, It is extremely easy to transport to the sea area and store immediately before construction, and greatly reduces the risk of decay on the way. In addition, when attaching to the building structure, the leaf-shaped portion does not hinder the work, so that the handling is simple. In addition, as an example of a specific seaweed capable of such a treatment, alame, squid, kurome,
Examples include seaweeds of the family Laminariaceae such as hirome, kelp, wakame, and antokeme, and lentils.

According to the second aspect of the present invention, after the seaweed seedlings are grown on a carrying substrate of an appropriate shape capable of being transported and grown appropriately,
The technical means of removing most of the leaf-like parts while leaving the growth zone part was adopted. In this case, since the algae can be attached to the structure for construction while the algae are still attached to the supporting substrate, the root-like portion is used as in the case of collecting and using naturally grown seaweed. The improper fixation due to the damage received is greatly reduced, the growth after transplantation is good, and there is an advantage that it can be easily attached to the construction.

According to the third aspect of the present invention, when the seaweed seeds are transplanted to form a seaweed bed, a technical means is employed in which the seaweed seeds are stored in a state where most of the leaf-like parts are removed while leaving the growth zone. did. In this case, the form of the algal body includes a form comprising a stem-like portion and a root-like portion from which the leaf-like portion is completely removed depending on the position of the growth zone. According to this storage method, the leaves that cause decay are positively removed, so that a more stable storage state is ensured. It is also effective as a storage method for natural algae bodies that have been damaged to some extent when they are done. The invention according to claim 4 employs a technical means in which the algal bodies from which the leaf-like portions have been removed are stored without being immersed in seawater. If you keep moderate humidity,
As in the present invention, a more stable storage state can be obtained for a long period of time when stored in a state not immersed in seawater. It is effective to maintain the freshness of the algal cells if the storage temperature is kept at 10 ° C. or lower, particularly about 5 ° C., but depending on the type of seaweed and the storage conditions, even at a storage temperature of 10 ° C. or higher. In some cases, it can withstand enough.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION The seaweed seeds and seedlings according to the present invention may be either natural or obtained by aquaculture, but aquaculture is more suitable from the viewpoint of mass supply. The artificial growth is carried out, for example, by releasing spores in an aquarium or the like using algae collected from its own material, Cremona (trade name)
The seedling can be grown on a suitable seedling such as a rope, and then wrapped around a suitably shaped carrier such as a rope and grown in the sea. It should be noted that the rope-cultured one can be cut into appropriate lengths while the algae remain on the rope, and can be used as it is for transplantation with almost no damage to the roots. Therefore, it is suitable as a seedling for seaweed.

Next, a specific method of removing the foliate portion will be described with reference to FIG. 1 showing a standard form of a typical seaweed of the kelp family, which is a typical useful seaweed in the formation of a seaweed bed. . As shown in the figure, the algal body is composed of a root-like part 1, a stem-like part 2, and a leaf-like part 3, and a growing zone part 4 for regenerating the leaf-like part 3 exists near the base of the leaf-like part 3. Therefore, the cutting may be performed at a position slightly above the boundary between the stem 2 and the leaf 3. In this case, in a type having side lobes, cutting so as to leave the lowermost side lobe is effective for regeneration of the leaf-shaped portion 3. When the leaf 3 of the grown alga is cut so as to remove most of the alga body leaving the growth zone portion 4, the weight after the cut is, for example, 1/3 of the initial weight when the alga body length is about 1 m. Since it is 大幅 or less, the outer shape is greatly reduced and it is not bulky, so that the usability as a seaweed seedling is extremely good from the simplicity of subsequent storage and the stability of life maintenance. It is preferable that the seaweed seedlings be set on an appropriate carrier such as a rope or a plate in terms of storage and transplantation work and subsequent growth.

[0010] The seaweed seeds for the formation of a seaweed bed are stored in a state where most of the leaf-like portions 3 are removed except for the growth zone portion 4 as described above. In this case, it is desirable to keep the storage temperature at 10 ° C. or lower, but depending on the type of seaweed and storage conditions, there are cases where even higher storage temperatures can be put to practical use. In the transportation, it is desirable that the container is stored in a container made of styrene foam, cardboard, or the like, and is transported without keeping seawater at an appropriate humidity and low temperature. By the way,
It has been confirmed that when transported and stored at about 5 to 10 ° C. without seawater, there is no problem if the period is about 2 weeks.

The test results are shown below. Table 1 shows the results of performing a freshness test for evaluating the suitability of the storage state. With regard to the chrome, alame, and vine aleame, those with leaves (leaving the leaves intact) and those in the leaves Cut the material slightly above the base and remove most of it (processed). Store it in a state of moderate moisture (without seawater) so that the alga body does not dry, or store it immersed in seawater. It shows the results for each storage temperature in the case of the above. The number of days at the top indicates the number of storage days. Here, ○ indicates that little decrease in freshness was observed (less than 30% decrease in freshness), and X indicates XX means that decrease in freshness accompanied by discoloration (black) was 50% or more.
The marks indicate the cases where the freshness was reduced by 50% or more, in which the tissue was softened and put in decay.

[Table 1]

From the results of the freshness test described above, it is clear that the treated one from which most of the leaf-like parts have been removed is superior in preservability as compared with the untreated algal body. Regarding the storage condition, in the case of Kurume and Alame, when the storage period is about 5 days, the decrease in freshness is less when immersed in seawater, and when the storage period is further extended, the tendency reverses, and when immersed in seawater. It was confirmed that the decrease of the freshness was less in the absence. This is related to the decay rate of seawater, and soaking in seawater is effective in maintaining the freshness of algal bodies while seawater decay does not progress, but as decay progresses, the existence of the seawater is rather algae. It is thought to be due to adverse effects on body freshness. Therefore, when storage for 5 days or more is required, it is more advantageous to store fresh water without using seawater in order to maintain freshness. In particular, vine aleame has less decrease in freshness than chrome or arame under any of various storage conditions. With respect to the storage temperature, when the temperature is 20 ° C. or higher, a brown liquid is eluted from the algal cells, causing a significant decrease in freshness. Considering the storage period and the fixation rate thereafter,
About 5 ° C. is desirable.

Next, the results of transplantation tests in which the specimens used in the freshness test described above were attached to a concrete structure and submerged in the sea, and the growth state was observed thereafter are shown in Table 2. The observation results were obtained by comprehensively evaluating the observation results performed one month, three months, and six months after transplanting each specimen into the sea. Here, the mark ○ indicates that the growth state is stable after that, when the fixation rate is 70 to 80% or more, the mark X indicates that the identification adhesion rate is 50% or less, and the mark XX indicates that most of the dead state. Each case is shown.

[Table 2]

[0014] From the results of the above transplantation test, the treated plant in which most of the leaf portion was removed except for the growth zone for regenerating the leaf portion was compared with the untreated alga body in which the leaf portion was left as it was. It is clear that the subsequent fixation rate is high and the transplantability is excellent. In addition, it is apparent that algal cells stored in a state not immersed in seawater are generally superior in transplantation. Furthermore, the algal cells stored at 20 ° C. or more have a drastic decrease in freshness, and are less likely to be fixed even when transplanted in the sea. In addition, under all storage conditions, vine alame shows better results than other seaweeds, and is suitable as a seaweed seedling for seaweed bed creation.

[0015]

According to the present invention, the following effects can be obtained. (1) Since most of the leaf-like portions of the alga body have been removed, the number of leaf-like portions that are likely to decay is reduced, so that a more stable and well-preserved seaweed seedling can be obtained, and longer-term storage is possible. (2) Seaweed seeds are composed of roots and the like from which most of the leaf-like parts of the alga are removed, and since the outer shape of the seeds is reduced and not bulky, handling in storage or transportation is greatly improved. . (3) In the case where the algae are formed on an appropriately-shaped transfer base that can transfer the alga bodies, the roots are hardly damaged during the work of attaching the alga bodies to the construction structure, so that the fixing rate is improved. This is extremely effective in simplifying the mounting work.

[Brief description of the drawings]

FIG. 1 is a schematic explanatory view showing an application example of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Root-like part, 2 ... Stem-like part, 3 ... Leaf-like part, 4 ... Growth zone part

Claims (4)

[Claims] 1. Excluding a growth zone portion for regenerating a foliate portion,
A seaweed seedling for seaweed bed creation, wherein the seaweed seedling is improved in preservability and transportability as a seaweed seedling by supplying as algae bodies with most of the foliage removed. 2. The seaweed seed and seedling for algae bed creation according to claim 1, wherein said algal bodies are settled on a carrier substrate of an appropriate shape capable of being transported. 3. An algae characterized in that when a seaweed seedling is transplanted to form a seaweed bed, a growth zone for regenerating a leaf-like portion is left, and an algal body in a state where most of the leaf-like portion is removed is stored. How to store seaweed seeds for site development. 4. The method for storing seaweed seeds for seaweed bed creation according to claim 3, wherein the algal bodies from which the leaf-shaped portions have been removed are stored in a state where they are not immersed in seawater.