JP4213069B2 - Marine seed plant growing material, production method of marine seed plant growing material, and creation method of marine seed plant growing ground - Google Patents

Description

  The present invention relates to a marine seed plant growing material such as sea cucumber, a method for producing a marine seed plant growing material, and a method for constructing a marine seed plant growing field.

  Sea otters (Zostera marina) are seaweeds that grow in the shallow waters of the Northern Hemisphere, and are widely distributed from Hokkaido to Kyushu on the coast of Japan. The plant height is 1-2 m, and inner bays and shallow waters with a depth of 7-8 m or less. A community is formed in the sea area. The eelgrass field, where eelgrasses grow in a community, plays a very important role in the ecosystem and environmental conservation of inner bays and shallow waters. In other words, the Amamo Field has become a place for spawning and growing / breeding seafood, as it is used as a hiding place from external enemies, as it eases the tide, and it also becomes a source of nitrogen and phosphorus that cause eutrophication of the sea. It also plays an important role in water purification in inner bays and shallow waters. In recent years, with the decrease of Japanese eel field on the coast of Japan, technical development for recovery of Japanese eel field has been carried out (see Non-Patent Document 1 below).

  In order to create such a eelgrass field, Patent Document 1 below discloses a eelgrass growing structure in which seeds are contained on the surface of a cage-like or rope-like lump made of clay. According to this eel breeding structure, there is no seed loss due to waves, and the germination rate is higher than that of direct sowing, but depending on the environment, the structure periphery is scoured before germination and the structure is exposed to the sand surface In addition, floating mud may accumulate, and it may be difficult to germinate. Also, the sea cucumber cultivating body can be seeded only in a strip shape because it is rope-shaped or ribbon-shaped, and cannot be seeded uniformly over a wide area. As described above, in the structure for breeding eelgrass of Patent Document 1, the germination rate varies depending on the external force environment of the sea area such as scouring and sedimentation, and seeds cannot be sown uniformly over a wide range.

  Patent Document 2 discloses a method of coating and granulating seeds with a coating material containing a hydraulic material such as gypsum and a water-repellent material such as stearic acid, palmitic acid, and metal salts thereof. According to this method, the moisture content of the seed can be maintained and sowing can be performed in a wide range, but the germination rate is lower than that in the case of direct sowing.

  Patent Document 3 discloses a eel vegetation vegetation method in which sand, linseed seeds, and a powdery paste-like substance are mixed to form a gel and then sprayed from the water surface to the seabed. According to this vegetation method, seeds can be uniformly sown in the sea area, but when a mixed gel substance is laid, there may be seeds on the surface of the substance, so that the seeds are likely to be washed away, and the eels germinate. It is difficult to cover sand with a suitable thickness, and the germination rate tends to decrease. Thus, in the eel vegetation method of Patent Document 3, there is a high possibility that the seeds will be washed away, and if the sand covering is not performed in addition to the sowing operation, the environment in which the seeds are likely to germinate is not obtained.

  In addition, it is known that seedlings are sown by mat (sheet) type, pot type, net-like bag body, enveloping type, hollow block type or the like (see Patent Documents 4 to 8 below). There are some problems.

  That is, in the mat method of biodegradable substances, benthic animals below the material cannot escape because the material itself becomes an obstacle until the material is decomposed. In the mat method, net-shaped bag type, and hollow block type, seaweeds other than sea turtles grow on the upper part and the reinforcing bars that fix the mat, and competition occurs. Further, the mat method may be buried more than the appropriate depth due to its own weight, which may adversely affect the germination rate.

In addition, in the fixing method using a biodegradable substance, the decomposition takes time. In addition, in the rope type, mat type, etc., when laying uniformly on the target site, diving work is required, which takes time.
Mie Prefectural Science and Technology Promotion Center FY2002 Joint Research Results Public Lecture Presentation Material “Let's Increase Amamo Field” (http://mpstpc.pref.mie.jp/topics/kou0202/) JP 09-205915 A Japanese Patent Laid-Open No. 11-341904 JP 2001-45896 A JP 10-42626 A JP 2002-171852 A JP 2001-169611 A JP 08-242717 A Japanese Patent Laid-Open No. 07-213189

  In view of the above-described problems of the prior art, the present invention provides a marine seed plant growing material and a method for producing a marine seed plant growing material that can be sown in a wide range without causing seeds to flow out and increase the germination rate. The purpose is to do. It is another object of the present invention to provide a method for constructing a marine seed plant breeding ground that can reliably build a marine seed plant breeding ground on the sea floor.

  In order to achieve the above object, the marine seed plant growing material according to the present invention is a granular material obtained by mixing a viscous soil containing marine seed plant seeds and dredged soil, a solidified material mainly composed of gypsum, and a water-soluble polymer. It is characterized by that.

  According to this marine seed plant breeding material, the specific gravity can be made larger than seeds only (about 1.3) to about 2.3 by mixing the seeds with koji and granulating the material. The possibility of being washed away is low, and the grains can be buried to a depth suitable for seed germination. Moreover, since the material can be made into a granulated product having an outer diameter of about 3 to 20 mm, it can be seeded uniformly over a wide range. In addition, it keeps anaerobic condition suitable for seed germination among the materials, and after germination, the dredged soil part can be muddy and supply nutrients, and until the seed germinates because it is wrapped in clay soil The germination rate can be increased without being preyed by benthic animals. Moreover, marine seed plants such as eelgrass can be constructed without adversely affecting benthic animals that already live, and granulated products are neutral and non-toxic and have no effect on the surrounding sea area.

In addition, another marine seed plant growing material is characterized in that a viscous soil containing marine seed plant seeds and dredged soil and a gelling agent for hardening the material are mixed and processed into a gel. .

  According to this marine seed plant growing material, the seed is mixed with dredged soil to make the material gel, so it is unlikely to be washed away after entering the sea area, and the material is buried to a depth suitable for seed germination. The seeds can be sown in a wide range without draining. Maintains anaerobic conditions suitable for seed germination among the materials, and after germination, the dredged soil part can be mud and supply nutrients, and the seeds are wrapped in cohesive soil, so the seeds are bent until germination The germination rate can be increased without being preyed by animals. In addition, the gelled product is neutral and non-toxic and does not affect the surrounding sea area.

  Yet another marine seed plant growing material according to the present invention is that marine seed plant seeds are fixed in a gap between a solidified material mainly composed of gypsum and a granulated product of viscous soil containing dredged soil containing a water-soluble polymer. Features.

  According to this marine seed plant growing material, the seeds are surrounded by granulated material, so there is little possibility of being washed away after entering the sea area, the grains can be buried to a depth suitable for seed germination, and the seeds flow out. Can be sown extensively without Among the materials, the dredged soil portion becomes mud, so that nutrients suitable for seed growth can be eluted, and the germination rate can be increased.

  In each of the above-mentioned marine seed plant growing materials, the marine seed plant is preferably an ammo. Examples of the eelgrass include the genus Amamo, the core moth, and the sea bream.

  Moreover, it is preferable that at least one of sand and gravel is further mixed in the above-described marine seed plant growing material. As a result, the weight of the marine seed plant growing material can be further increased, and the effects of preventing erosion and stabilizing the bottom sediment can be obtained at the marine seed plant growing ground.

  Moreover, it is preferable to further mix a nutrient. Thereby, a nutrient required for the cultivation of marine seed plants can be effectively provided. As a nutrient, general fertilizer or artificial zeolite containing nutrients such as nitrogen necessary in a large amount at the germination stage is preferable.

  According to the present invention, a method for producing a marine seed plant growing material such as sea cucumber is obtained by softening the marine seed plant growing material described above into the sea, changing the hardness to a suitable level before and after germination of the seed, and mudizing after germination. In order to supply nutrients suitable for the growth of the gel, a solidifying material and / or a gelling agent is blended in consideration of the peripheral flow rate and the retention period of the granulated material or gelled mixture.

  According to this method for producing marine seed plant growing materials, the softening rate of the material can be changed depending on the amount of the solidifying material / gelling agent added and the curing period of storage in the air. The growing material can be mudified after germination by setting the addition amount and the curing period. For this reason, nutrients are supplied to the surroundings by mudification after germination, and the growth of marine seed plants such as sea bream is subsidized, so that the germination rate of seeds can be increased. In addition, when sowing seed material for marine seed plant in the sea for the breeding of eelgrass, it is preferable to sow in consideration of the softening speed and germination time of the material, or a solidifying material / gelling agent in consideration of germination time It is preferable to sown the seeds with the added amount and curing period set.

  The method for constructing a marine seed plant breeding ground according to the present invention includes the above-mentioned marine seed plant growing material or the marine seed plant growing material produced by the above production method, and the marine seed plant growing on the sea floor. It is characterized by creating a place.

  According to this method for creating a marine seed plant breeding ground, the above-mentioned marine seed plant breeding materials are unlikely to be washed away, and can bury grains to a depth suitable for seed germination, sowing uniformly over a wide area. In addition, the anaerobic state suitable for seed germination can be maintained in the material, and after the germination, the dredged soil part can be muddy to supply nutrients, and the seeds are wrapped in clay soil Therefore, the germination rate of marine seed plants can be increased without being predated by benthic animals until germination. For this reason, a breeding ground for marine seed plants such as sea cucumber can be reliably established on the sea floor.

  Further, by further mixing at least one of sand and gravel as described above with the marine seed plant growing material, it is possible to obtain the effects of erosion prevention and bottom sediment stabilization in the marine seed plant growing ground, It becomes a support base that supports seed plants, and a support base can be reliably prepared. This makes it difficult for marine seed plants to flow out due to high waves and the like, and a marine seed plant breeding ground can be reliably established on the seabed.

  According to the marine seed plant growing material of the present invention, seeds can be sown in a wide range without flowing out, and the germination rate can be increased. Further, according to the method for producing a marine seed plant growing material of the present invention, the growing material can be mudified after germination by setting the addition amount of the solidifying material, so that the germination rate of seeds can be increased. In addition, according to the method for creating a marine seed plant breeding ground of the present invention, the germination rate of marine seed plants can be increased, and therefore, a breeding ground for marine seed plants such as sea cucumber can be reliably constructed on the sea floor.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

  <First Embodiment>

  FIG. 1 is a diagram showing steps (a) to (d) for building an eelgrass field using the eelgrass growing material of the present embodiment.

  The eel breeding material of the present embodiment is obtained by mixing a clay soil containing eel seeds and dredged soil, a gypsum-based solidifying material, and a water-soluble polymer, and then granulating the mixture. The granulation plant 31 shown in FIG. 1 (a) includes a granulation apparatus and the like, and as this granulation apparatus, one of the inventors of the present invention proposed in JP 2003-1297A together with other inventors. A grain mixer can be used.

  That is, when dredged soil, eelgrass seeds, neutral solidified material, and water-soluble polymer are supplied to the granulation plant 31 in FIG. 1 (a), the water-soluble polymer is mixed into the mud to aggregate water and granulate it. In addition, the charged solidification material is uniformly dispersed and applied around the particles of the object to be processed dispersed in the particle unit, and the object to be processed of the coated particle unit is more firmly aggregated and granulated. It becomes. Then, curing is performed for a predetermined period to obtain a large number of granulated materials 30 containing sea cucumber seeds 29 as schematically shown in FIG.

  Next, as shown in FIG. 1 (c), a large number of granulated materials 30 are placed on a transport ship 32 and transported to a seaweed basin site, and are put into the sea by a blind type sand-capping device 33 on the sea. The granulated material 30 is mixed with dredged soil and granulated, so that the specific gravity is about 2.3, which is larger than the seed alone (about 1.3), and has an appropriate weight. In addition, the granulated material 30 can be buried to an appropriate depth suitable for seed germination on the seabed G, and is buried under its own weight, so that it is not buried more than necessary.

  Moreover, since the granulated material 30 is a material with an outer diameter of about 3 to 20 mm that is easy to handle, it can be uniformly sown in a wide range. In addition, eelgrass seeds are wrapped in cohesive soil, so they are not preyed by benthic animals until germination.

  Then, as shown in FIG. 1 (d), the anaerobic state suitable for germination of sea cucumber seeds 29 is maintained in the granulated material 30, and germination is performed. it can. In this way, sea cucumber seeds are not drained by being covered with dredged soil containing a suitable solidifying material, and can be kept in an anaerobic state by dredged soil. Furthermore, the granulated material 30 can be softened for an arbitrary period, and does not hinder the growth after germination.

  As described above, according to the granulated material containing the eel seeds of the present embodiment, the eel seeds can be sown in a wide range without flowing out, the germination rate can be increased, and the already inhabited benthic Amamo fields can be created without adversely affecting animals. Further, the granulated material 30 is neutral and non-toxic, and does not affect the surrounding sea area.

  Moreover, the blind type sand covering device 33 for seeding the above-mentioned many granulated materials 30 is as shown in FIGS. 1 (c) and 1 (d), from the tray 34 that descends while being suspended by the wire 35 from the bottom of the sand covering device 33. Throw into the sea. That is, a large number of granulated materials 30 are packed in the tray 34 by the sand covering device 33 and lowered into the sea, and the plurality of blind members 36 provided at the bottom of the tray 34 rotate about the respective rotation shafts 37, thereby causing the tray 34. The bottom of the is open. In this case, the tray 34 is suspended by the wire 35 from the bottom of the sand covering device 33 and descends into the sea, and the descent depth is determined in consideration of the water depth, the flow velocity, and the like. Thus, the sea cucumber breeding material can be uniformly seeded in the sea area at once using the blind sand-capping device 33 or, for example, a bottom-open barge ship, and can be efficiently seeded over a wide area.

  In addition, the benthic animals can be moved by sowing the granulated material 30 at an appropriate interval. In addition, eel seeds are not exposed to the sand surface, and no sedimentation of floating mud occurs, so the germination rate of eel seeds does not vary depending on the environment.

  In addition, as said water-soluble polymer, RC-1, RC-1 (QB) (Ternite), Pararoc (Ishihara Sangyo), etc. can be used, for example. Moreover, as a neutral solidification material, the thing solidified by neutrality mainly using gypsum, such as a zip sander (Ishihara industry) or a plaster lock (Niwa Corporation), can be used, for example. This solidification is almost completed in about several hours.

  <Second Embodiment>

  FIG. 2 is a diagram showing steps (a) to (c) for building an eelgrass field using the eelgrass growing material of the present embodiment.

  The eel breeding material of the present embodiment is made by mixing eel seeds, dredged soil (viscous soil), and a gelling agent (additive) composed of two liquids to form a gel.

  That is, as shown in FIG. 2 (a), after dredging clay, sea cucumber seeds, and a gelling agent composed of two liquids into the inlet 41 a of the pipe mixer 41 and mixing in the pipe mixer 41. The gelled mixture is supplied from the outlet 41b.

  Next, as shown in FIG. 2 (b), the gelled mixture 45 is sent to the placing ship 42 after being hardened to a moderately deformable hardness after about 30 minutes, and placed on the seabed G of the seaweed formation site. . Since the gelled mixture 45 is mixed with dredged soil to form a gel, it is unlikely to be washed away after placement in the sea, and the gelled mixture 45 can be buried to a depth suitable for the germination of sea cucumber seeds. In addition, eelgrass seeds are wrapped in cohesive soil, so they are not preyed by benthic animals until germination.

  Then, as shown in FIG. 2 (c), the anaerobic state suitable for germination of sea cucumber seeds 29 is maintained in the gelled mixture, and germination occurs. After the germination of sea cucumber seeds 29, the clay portion becomes mud and supplies nutrients. it can. As described above, the sea cucumber seeds are not discharged due to being covered with the dredged soil containing a suitable gelling material, and can be kept in an anaerobic state by the dredged soil. Furthermore, the gelled mixture 45 can be decomposed in an arbitrary period and does not hinder the growth after germination.

  As described above, according to the gelled mixture containing the eel seeds of the present embodiment, the eel seeds can be sown in a wide range without flowing out, the germination rate can be increased, and the already inhabited bottom Amamo fields can be created without adversely affecting live animals. In addition, the gelled mixture is neutral and non-toxic and does not affect the surrounding sea area. In addition, eel seeds are not exposed to the sand surface, and no sedimentation of floating mud occurs, so the germination rate of eel seeds does not vary depending on the environment.

  In addition, as a gelling agent composed of two liquids, for example, a gelling agent SIL-B (manufactured by Fuji Chemical Co., Ltd.) can be used, and “# 1000” (sodium silicate) and “activator” (dilute sulfuric acid) From 2 liquids (A liquid: # 1000 ... 25%, activator ... 11%, water ... 64%; B liquid: # 1000 ... 25%, water ... 75%) By adding 5 to 20% of A solution and B solution to the clay, etc., the solution is gelled and hardened in about 3 to 10 minutes in the neutral region.

  <Third Embodiment>

  FIG. 3 is a diagram showing steps (a) to (e) of the eelgrass field construction using the eelgrass growing material of the present embodiment.

  The eel-growing material of the present embodiment is obtained by fixing eelgrass seeds in the gap between granulated materials of clay soil containing clay containing a solidifying material mainly composed of gypsum and a water-soluble polymer. A granulation plant 31 shown in FIG. 3A includes a granulation apparatus similar to that shown in FIG. 1A, and a granulation mixer proposed in Japanese Patent Laid-Open No. 2003-1297 can be used.

  That is, when dredged soil / neutral solidifying material / water-soluble polymer is supplied to the granulation plant 31 in FIG. 3 (a), water can be aggregated and granulated by mixing the water-soluble polymer in the mud. The charged solidified material is uniformly dispersed and applied around the particles of the object to be processed dispersed in particle units, and the object to be processed of the applied particle units is more firmly aggregated to form the granulated material 50. .

  Next, as shown in FIG. 3 (b), the eel seed 29 is mixed with the granulated product 50 by sandwiching the eel seed 29 between the granulated product 50 in the form of a sand in the mold 48. Next, as shown in FIG. 3 (d), when this mixture is submerged on the seabed G using the work boat 51, the seagull seeds 29 are fixed in the gaps of the granulated material 50 by natural solidification. In this way, the sea eel seeds 29 are surrounded by the granulated material 50, so that the possibility of being washed away after entering the sea is low, and the mixture can be buried to a depth suitable for seed germination. Then, as shown in FIG. 3 (e), the eel seeds 29 germinate, but the clay portion of the mixture becomes mud and the nutrients suitable for the growth of the eel seeds can be eluted. In this way, sea cucumber seeds are not drained by being covered with dredged soil containing a suitable solidifying material, and can be kept in an anaerobic state by dredged soil. Furthermore, the mixture can be decomposed at any time and does not hinder the growth after germination.

  As described above, according to the mixture in which the eel seeds of the present embodiment are fixed, the eel seeds can be sown in a wide range without flowing out, and the germination rate can be increased. In addition, eel seeds are not exposed to the sand surface, and no sedimentation of floating mud occurs, so the germination rate of eel seeds does not vary depending on the environment.

  Further, as shown in FIG. 3C, the eel seeds 29 are mixed in the granulated product 50 and mixed in the mold 49 so that the eel seeds 29 are fixed in the gaps of the granulated product 50. Also good.

  When the above-mentioned eel breeding materials are produced, solidification is performed considering the peripheral flow rate and the retention period of the granulated product / gelled mixture in order to supply nutrients suitable for the growth of eel seeds before and after germination of eel seeds. It is preferable to mix a material and a gelling agent.

  According to the manufacturing method described above, the granulated material can maintain its state during an arbitrary period, and the blending amount of the solidifying material that can maintain the granular state while taking the eel seeds inside is changed according to the flow rate of the eelgrass field formation site. For example, when holding the granulated material for one month, the addition amount of the solidifying material is increased or decreased according to the flow rate, and the addition amount of the solidifying material is about 5 to 15 corresponding to the flow rate range of 10 cm / s to 1 m / s. Set to%.

  Similarly, in the case of a gelled mixture, the solution addition amount is about 10 to 20% corresponding to the flow rate range of 10 cm / s to 1 m / s.

  As described above, according to each of the embodiments, the eel seeds are floated when the eel breeding material is introduced into the sea area by mixing the eel seeds with clay soil having a higher specific gravity than the eel seeds. In order to prevent and maintain moderate burial even in a place where the flow velocity is somewhat large, it is possible to efficiently create an ammo field. In addition, as described later, sand and gravel are mixed to further increase the dead weight of the granulated material 30 and the gelled mixture 45, thereby further preventing floating of sea eel seeds and maintaining appropriate burial even at high flow speeds. it can.

  In addition, sticky soil such as dredged soil is used as a material for growing duck, and the surrounding area of duck is covered with dredged soil until the germination time, so that duck seeds can maintain anaerobic conditions suitable for germination. The rate can be increased. In addition, the prepared seedling-grown eel-growing material is soft, and even if other seaweed spores grow, it cannot be rooted, and competition does not occur. In addition, after the eel germination, the cohesive soil becomes a support base for supporting the roots of the eel germination individuals, and even when high waves or the like occur, the eel germination individuals are less likely to flow out.

  Moreover, by setting the addition amount of the solidifying material, the sea cucumber growing material can be softened after being put into seawater and mudified after germination.

  In addition, for example, the granule plant 31 shown in FIG. 1A or FIG. 2A can be manufactured on the sea with the granulation plant 31 shown in FIGS. 1A and 2A, and sowing work can be performed without diving work. Therefore, it is possible to create a eelgrass field on a large scale. Moreover, since seeding can be performed at an appropriate interval, benthic animals that grow in the vicinity can move.

  In FIGS. 1 and 2 described above, it is preferable to further mix sand and gravel when producing the granulated material 30 or the gelled mixture 45 containing the sea eel seeds 29. By mixing the sand and gravel, the weight of the granulated material 30 and the gelled mixture 45 can be further increased, and the effect of preventing erosion and stabilizing the bottom sediment can be obtained in the eelgrass field.

  That is, as shown in FIG. 4 (a), the eel germination individuals 29a after the eel seeds germinate have roots 29b in the seabed G, but the roots 29b are entangled with clayey soil or mixed sand / pebbles 29c. Cohesive soil or mixed sand / pebbles 29c serves as a support base for supporting the root 29b, and the root can be more securely stretched in place. Thus, by mixing sand and gravel, it is possible to prepare a support base that reliably supports the root 29b of the sea bream germinating plant 29a within the seabed G. Therefore, as shown in FIG. Even if high waves or the like are generated in H or the like, the eel germination individual 29a can withstand, and it becomes difficult to flow out, and an eelgrass field can be reliably created on the seabed.

  For example, as shown in FIG. 4 (c), in the case of general bottom mud, the conventional eel germination individual 29d has no support base or is weak even if the root 29e is stretched in the bottom mud. ), When a high wave or the like occurs in the horizontal direction H on the seabed G, it is easily washed away, but according to the granulated product 30 and the gelled mixture 45 of the first and second embodiments. For example, the root support base can be prepared with viscous soil, and even if high waves or the like occur, it will be difficult to flow out, and furthermore, it will be more difficult to flow out by mixing sand and gravel into the granulated material 30 and the gelled mixture 45. is there. In addition, both sand and gravel may be mixed, and either one may be mixed.

  Further, by further mixing a nutrient with the granulated product 30 and the gelled mixture 45, it is possible to more effectively provide nutrients necessary for the growth of sea cucumbers, so that the germination rate of sea cucumber seeds can be further increased. As a nutrient, general fertilizers such as oil cake containing nutrients such as nitrogen necessary in a large amount at the germination stage, artificial zeolite (NH4 type, Fe type, etc.) and the like are preferable.

  In the present specification, “softening” of a marine seed plant growing material (sea cucumber growing material) means that the hardness of the marine seed plant growing material decreases, but the shape is maintained. Also, “mudification” of the marine seed plant growing material (sea eel growing material) refers to the original mud state without maintaining the shape of the marine seed plant growing material.

  As described above, the present invention has been described with reference to the embodiments. However, the present invention is not limited to these embodiments, and various modifications can be made within the scope of the technical idea of the present invention. For example, the granulation plant 31 shown in FIG. 1 (a) or FIG. 2 (a) may be installed on land to produce a granulated product.

It is a figure which shows the process (a) thru | or (d) of the sea eel field creation by the sea cucumber breeding material of 1st Embodiment. FIG.1 (e) is a perspective view which shows roughly the tray of the sand covering apparatus of FIG.1 (c). It is a figure which shows the process (a) thru | or (c) of the sea lion field creation by the sea cucumber breeding material of 2nd Embodiment. It is a figure which shows the process (a) thru | or (e) of the mallard field creation by the mallard growth material of 3rd Embodiment. FIGS. 1A and 1B schematically show the sprouting germs and the root state after sprouting seeds when sand and gravel are further mixed with the granulated product 30 and the gelled mixture 45 of FIGS. FIG. 4 (b) schematically shows how the sprouting individual of 4 (a) can withstand high waves and the like, and a diagram schematically showing the state of the root sprouting individual and its root for comparison (c) FIG. 5D is a diagram (d) schematically showing a state in which the conventional eel germination individual of FIG. 4C is swept away by high waves and the like.

Explanation of symbols

29 Amamo Seeds (Marine Seed Plant Seeds)
30 Granulated product 31 Granulation plant 41 Pipe mixer 42 Placing vessel 45 Gelation mixture 48, 49 Mold 50 Molding product 51 Work vessel 29a Ammo germination plant 29b Root 29c Cohesive soil and mixed sand and gravel

Claims (7)

  A marine seed plant growing material characterized by mixing and granulating a viscous soil containing marine seed plant seeds and dredged soil, a solidified material mainly composed of gypsum, and a water-soluble polymer. Marine seed plant growth material, wherein the solidifying material consisting mainly of gypsum, that is fixed to marine seed plants seeds gap granulate of cohesive soil and a dredged material blended with a water-soluble polymer. The marine seed plant growing material according to claim 1 or 2 , wherein the marine seed plant is a sea eel. The marine seed plant growing material according to any one of claims 1 to 3 , wherein at least one of sand and gravel is further mixed. The marine seed plant cultivation material of any one of Claims 1 thru | or 4 which further mixed the nutrient. The marine seed plant growing material according to any one of claims 1 to 5 is softened after being put into the sea, changed to a hardness suitable for before and after germination of seeds, and mud after germination and suitable for growth of marine seed plants. In order to supply nutrients, the manufacturing method of the marine seed plant growth material characterized by mix | blending the solidification material which considered the peripheral flow velocity and the retention period of the granulated material. The marine seed plant growing material according to any one of claims 1 to 5 or the marine seed plant growing material produced by the production method according to claim 6 is introduced into the sea to produce a marine seed plant on the sea floor. A method for constructing a marine seed plant breeding ground, characterized by creating a breeding ground for the sea.

Images