JP2010104362A - Hardened material for creating seaweed bed - Google Patents

Hardened material for creating seaweed bed Download PDF

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JP2010104362A
JP2010104362A JP2009207969A JP2009207969A JP2010104362A JP 2010104362 A JP2010104362 A JP 2010104362A JP 2009207969 A JP2009207969 A JP 2009207969A JP 2009207969 A JP2009207969 A JP 2009207969A JP 2010104362 A JP2010104362 A JP 2010104362A
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seaweed
hardened
seaweed bed
concrete
cured product
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Kazuhiro Komiya
量浩 小宮
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KOMIYA KENSETSU KK
TAISEI CONCRETE KK
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TAISEI CONCRETE KK
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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
    • E02B3/04—Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
    • E02B3/043—Artificial seaweed
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A10/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE at coastal zones; at river basins
    • Y02A10/26—Artificial reefs or seaweed; Restoration or protection of coral reefs
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
    • Y02A40/80—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in fisheries management

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Artificial Fish Reefs (AREA)
  • Cultivation Of Seaweed (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hardened material for creating a seaweed bed, efficiently supplying ferrous ions to organisms. <P>SOLUTION: The concrete for creating a seaweed bed, having a surface shape of a natural stone shape, is obtained by mixing cement, steel slag crushed to ≤40 mm, decayed broadleaf tree chips of about 20-80 mm, and water, pouring the mixture thus obtained into a mold, curing the product in a mold until the product becomes hardened, and crushing the concrete obtained by hardening in a mold so as to bring a unit volume mass to 2-3 ton/m<SP>3</SP>. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は藻場造成用硬化物に関する。詳しくは、海中に投下されて藻場の造成に役立つ藻場造成用硬化物に係るものである。   The present invention relates to a cured product for creating seaweed beds. Specifically, the present invention relates to a cured product for seaweed bed construction that is dropped into the sea and is useful for the creation of seaweed bed.

近年、浅海域に生えている昆布やワカメ等の海藻が減少し、サンゴモ（石灰藻）と呼ばれる薄いピンク色の硬い殻のような海藻が海底の岩の表面を覆いつくした、「磯焼け」と呼ばれる現象が、漁業などに大きな打撃を与えている。   In recent years, seaweeds such as kelp and seaweed that grow in shallow waters have decreased, and seaweeds like a thin pink shell called coral (lime algae) have covered the surface of rocks on the seabed. The phenomenon called is having a big impact on fisheries.

即ち、海底を覆うサンゴモは、他の海藻の付着を妨げる物質を表面から分泌したり、表層細胞を剥離して自分の体の上に他の海藻が生育しないようにしたりしているため、磯焼けになると大型の藻類の回復は困難（藻場の消失）となる。そして、小魚の隠れ家や産卵場所である藻場が消失することで、小魚や、小魚を食べる大型魚が寄り付かなくなり、年々水揚げが減少しているのである。   That is, corals that cover the sea bottom secrete substances that interfere with the attachment of other seaweeds from the surface, or peel off surface cells so that other seaweeds do not grow on their bodies. When burned, it is difficult to recover large algae (disappearance of algae beds). And the disappearance of small fish hideouts and spawning grounds makes it impossible for small fish and large fish that eat small fish to come close, and landings are decreasing year by year.

また、藻場の消失は、多くの魚類をはじめとする海生動物の生活の場や産卵場所を失うばかりでなく、光合成を行なうため海の生態系の非常に重要な存在となっている植物群を失うことにもなり、海の生態系は大きな影響を受けることになる。   Also, the disappearance of the seaweed bed not only loses the place of life and spawning for marine animals, including many fish, but also a plant that has become a very important part of the marine ecosystem for photosynthesis. The loss of flocks will greatly affect the marine ecosystem.

磯焼けの原因の一つとして、従来は海藻類が吸収しやすい「二価鉄イオン（Ｆｅ２＋）」が森林から河川を通じて海へ供給されていたのに対し、近年では森林の伐採やダムの造成等によって、二価鉄イオンの供給量が減少したことが挙げられている。 As one of the causes of firewood burning, “bivalent iron ions (Fe 2+ )”, which are easily absorbed by seaweeds, have been supplied from forests to the sea through rivers. It is mentioned that the supply amount of divalent iron ions has decreased due to the creation.

これに対して例えば、特許文献１には、ブロック本体の表面に大きな稜角部を有する溝状凹部を形成すると共に、この溝状凹部に隣接して比較的小さな溝を一もしくはそれ以上設け、二価の鉄を含む鉄分を配合したガラス質材料とセメントモルタルとを混合して硬化させることにより形成した板状増殖材を溝状凹部に配設する沈設ブロックが記載されている。
また、特許文献２には、溶融硫黄１０〜６０質量％に高炉スラグ７０〜３０質量％、石炭灰２０〜１０質量％を混合し、成形固化したブロックが記載されている。 On the other hand, for example, in Patent Document 1, a groove-shaped recess having a large ridge corner is formed on the surface of the block body, and one or more relatively small grooves are provided adjacent to the groove-shaped recess. A settling block is described in which a plate-like breeding material formed by mixing and curing a vitreous material containing cemented iron containing valent iron and cement mortar is disposed in a groove-like recess.
Patent Document 2 describes a block obtained by mixing 10 to 60% by mass of molten sulfur with 70 to 30% by mass of blast furnace slag and 20 to 10% by mass of coal ash and molding and solidifying the block.

特許第２６４０９２６号公報Japanese Patent No. 2640926 特開２００２−４５０７８号公報Japanese Patent Laid-Open No. 2002-45078

しかしながら、特許文献１や特許文献２の発明のように、海藻等の光合成生物が摂取可能な二価鉄イオンを溶出させたとしても、二価鉄イオンは水中の酸素によって酸化されやすく、三価鉄イオンになって即座にＦｅ２Ｏ３として沈降し、生物が摂取することが不可能となる。 However, as in the inventions of Patent Document 1 and Patent Document 2, even when divalent iron ions that can be ingested by photosynthetic organisms such as seaweed are eluted, the divalent iron ions are easily oxidized by oxygen in water. It becomes iron ions and immediately precipitates as Fe 2 O 3 , making it impossible for organisms to ingest.

本発明は、以上の点に鑑みて創案されたものであり、効率的に二価鉄イオンを生物へ供給できる藻場造成用硬化物を提供することを目的とする。   The present invention has been made in view of the above points, and an object of the present invention is to provide a cured product for creating seaweed beds that can efficiently supply divalent iron ions to living organisms.

上記の目的を達成するために、本発明の藻場造成用硬化物は、固化材と、鉄鋼スラグと、木材チップと、水とを含む組成物の硬化物である。   In order to achieve the above object, the hardened material for seaweed formation of the present invention is a hardened material of a composition containing a solidifying material, steel slag, wood chips, and water.

ここで、木材チップからフルボ酸が放出され、鉄鋼スラグから放出される二価鉄イオンとフルボ酸が結合して、水溶性で寿命が長いと共に海水中で酸化しにくい安定したフルボ酸鉄を生成できる。   Here, fulvic acid is released from wood chips, and divalent iron ions released from steel slag combine with fulvic acid to produce stable iron fulvic acid that is water-soluble and has a long life and is not easily oxidized in seawater. it can.

また、本発明の藻場造成用硬化物の単位容積質量が２〜３トン／ｍ３である場合、波があっても藻場造成用硬化物が転がりにくくなり好ましい。 Also, if the unit volume weight of the seaweed Construction for the cured product of the present invention is 2-3 tons / m 3, even if the wave becomes hard to roll is cured for seaweed Construction preferable.

更に、本発明の藻場造成用硬化物の表面形状が自然石形状である場合、藻場造成用硬化物を積み上げたときに空隙が形成されやすく、よって魚が棲み着きやすい。   Furthermore, when the surface shape of the hardened material for creating a seaweed bed of the present invention is a natural stone shape, voids are easily formed when the hardened material for creating a seaweed bed is piled up, so that fish can easily catch.

また、本発明の藻場造成用硬化物において、組成物が糞尿を含む場合、糞尿はタンパク質、アミノ酸、尿素、尿酸等を含むので、分解する際にアンモニアを生成し、鉄鋼スラグから放出される二価鉄イオンとアンモニアとが錯体化し、フルボ酸鉄と同様に酸化しにくい物質を生成できる。   Further, in the cured product for seaweed formation of the present invention, when the composition contains manure, since manure contains protein, amino acids, urea, uric acid, etc., ammonia is generated during decomposition and released from the steel slag. Bivalent iron ions and ammonia can be complexed to produce a substance that is difficult to oxidize like iron fulvic acid.

また、本発明の藻場造成用硬化物において、固化材はセメントである場合、他の固化材に比べて硬化物の強度を高くすることができる。   Moreover, in the hardened | cured material for seaweed bed construction of this invention, when a solidification material is cement, the intensity | strength of hardened | cured material can be made high compared with another solidification material.

また、本発明の藻場造成用硬化物において、木材チップの少なくとも一部が腐敗した場合、フルボ酸が放出されやすいと共に、木材チップが腐敗して消失することで、木材チップの位置に孔が形成されて硬化物が多孔質化し、硬化物の表面に凹凸が形成されて海藻の種子が付着しやすくなる。   Further, in the hardened material for creating seaweed beds of the present invention, when at least a part of the wood chip is spoiled, fulvic acid is easily released, and the wood chip is spoiled and disappears, so that a hole is formed at the position of the wood chip. As a result, the cured product becomes porous, and irregularities are formed on the surface of the cured product, which makes it easier for seaweed seeds to adhere.

また、本発明の藻場造成用硬化物において、組成物は、腐葉土を含む場合、腐葉土からもフルボ酸が放出され、より多くのフルボ酸鉄を生成できる。   Moreover, in the hardened | cured material for seaweed bed construction of this invention, when a composition contains humus, fulvic acid is also released from humus and can produce more fulvic acid iron.

また、本発明の藻場造成用硬化物において、組成物は、炭を含む場合、炭からもフルボ酸が放出され、より多くのフルボ酸鉄を生成できる。   Moreover, in the hardened | cured material for seaweed bed construction of this invention, when a composition contains charcoal, fulvic acid is discharge | released also from charcoal and it can produce | generate more fulvic acid iron.

本発明に係る藻場造成用硬化物は、効率的に二価鉄イオンを生物へ供給できる。   The hardened material for seaweed formation according to the present invention can efficiently supply divalent iron ions to living organisms.

本発明の藻場造成用硬化物を海中の被覆石として使用した施工例を示す概略図である。It is the schematic which shows the construction example which used the hardened | cured material for seaweed bed construction of this invention as a covering stone in the sea. 本発明の藻場造成用硬化物を海中の築磯材として使用した施工例を示す概略図である。It is the schematic which shows the construction example which used the hardened | cured material for seaweed bed construction of this invention as a construction material in the sea.

本発明の藻場造成用硬化物は、固化材と、鉄鋼スラグと、木材チップと、水とを含む組成物の硬化物である。
ここで、固化材としては、一般的な固化材を使用できるが、硬化物の強度を比較的高くすることができるので、セメントが好ましい。 The cured product for creating a seaweed bed of the present invention is a cured product of a composition containing a solidifying material, steel slag, wood chips, and water.
Here, as the solidifying material, a general solidifying material can be used, but cement is preferable because the strength of the cured product can be made relatively high.

また、鉄鋼スラグは、鉄鋼の製造工程において発生する鉄鋼副産物であり、転炉スラグ、予備処理スラグ、脱炭スラグ、脱リンスラグ、脱硫スラグ、脱珪スラグ、電気炉還元スラグ、電気炉酸化スラグ、二次精錬スラグ、造塊スラグ等が含まれる。これらを１種もしくは２種以上の混合物として使用することができる。
また、鉄鋼スラグは、酸化しやすく不安定な二価鉄（ＦｅＯやＦｅ３Ｏ４）を安定して含有する。特に、転炉スラグは二価鉄を２０％含み、発生量も大きいため供給が容易であり、鉄イオンの溶解度が高いことから、二価鉄イオンを溶出する材料として好ましい。
二価鉄は水中での酸化過程で溶出しやすく、二価鉄イオンの形で生物に吸収されるが、二価鉄は非常に不安定な物質である。 In addition, steel slag is a steel by-product generated in the steel manufacturing process. Secondary refining slag, ingot slag, etc. are included. These can be used as one kind or a mixture of two or more kinds.
Moreover, steel slag stably contains divalent iron (FeO or Fe 3 O 4 ) that is easily oxidized and unstable. In particular, the converter slag contains 20% divalent iron, and the amount generated is large, so that the supply is easy and the solubility of iron ions is high. Therefore, the converter slag is preferable as a material for eluting divalent iron ions.
Although divalent iron is easily eluted during oxidation in water and is absorbed by living organisms in the form of divalent iron ions, divalent iron is a very unstable substance.

また、木材チップは、廃木材等をチップ状にしたものであり、腐敗してフルボ酸を放出する。フルボ酸は水溶性であり、カルボル基とカルボルニル基を有し、鉄を結びつける機能があるため、鉄イオンがフルボ酸と結合し、水中でも安定なフルボ酸鉄が生成される。
また、腐敗してフルボ酸を放出するので、少なくとも一部が腐敗した木材チップを用いることが好ましい。
また、上記の組成物は、さらに腐葉土や、炭（例えば木炭）を含むこともできる。 The wood chip is a chip made of waste wood or the like, and decays to release fulvic acid. Since fulvic acid is water-soluble, has a carbol group and a carbonyl group, and has a function of binding iron, iron ions bind to fulvic acid, and stable fulvic acid iron is generated even in water.
Further, since rotates and releases fulvic acid, it is preferable to use wood chips that are at least partially rotten.
Moreover, said composition can also contain humus and charcoal (for example, charcoal).

また、固化材と、鉄鋼スラグと、木材チップと、水の配合比はどのような比率でもよいが、例えば、固化材：鉄鋼スラグ：木材チップ：水が、１：１０：４：１．５の場合、ある程度の空隙が形成されていると共に圧縮強度も高い硬化物が得られる。   The mixing ratio of the solidified material, the steel slag, the wood chip, and the water may be any ratio. For example, the ratio of the solidified material: steel slag: wood chip: water is 1: 10: 4: 1.5. In this case, a cured product having a certain amount of voids and a high compressive strength can be obtained.

図１は、本発明の藻場造成用硬化物を海中の被覆石として使用した施工例を示す概略図である。また、図２は、本発明の藻場造成用硬化物を海中の築磯材として使用した施工例を示す概略図である。
セメントと、４０ｍｍ以下に粉砕された鉄鋼スラグと、腐敗した２０〜８０ｍｍほどの広葉樹チップ（木材チップの一例である。）と、水とを混ぜ、得られた混合物を型枠に打ち込んだ。そして、硬化するまで型枠内で養生させた。次に、型枠内で硬化して得られたコンクリートを、単位容積質量が２〜３トン／ｍ３となるよう破砕して、表面形状が自然石形状である藻場造成用コンクリート（藻場造成用硬化物の一例である。）１を得た。
なお、混合物を硬化させることができれば、必ずしも混合物を型枠に打ち込んで型枠内で養生させなくてもよい。
得られた藻場造成用コンクリート１を、図１に示すように、海水２中に投下して、捨石等の上を覆うように敷き詰めて被覆石とした。敷き詰めて約１〜２ヵ月後には、藻場造成用コンクリート１に海藻３の成長を確認できた。 FIG. 1 is a schematic view showing a construction example in which the hardened material for creating a seaweed bed of the present invention is used as a covering stone in the sea. Moreover, FIG. 2 is the schematic which shows the construction example which used the hardened | cured material for seaweed bed construction of this invention as a construction material in the sea.
Cement, steel slag crushed to 40 mm or less, spoiled hardwood chips (an example of wood chips) of about 20 to 80 mm, and water were mixed, and the resulting mixture was poured into a mold. And it was made to cure in a mold until it hardened. Next, the concrete obtained by hardening in the formwork is crushed so that the unit volume mass is 2 to 3 ton / m 3, and the concrete for surface seaweed formation with a natural stone shape (algae bed) This is an example of a cured product for preparation.) 1 was obtained.
In addition, as long as the mixture can be cured, it is not always necessary to drive the mixture into the mold and cure it in the mold.
As shown in FIG. 1, the obtained concrete 1 for constructing a seaweed bed was dropped into seawater 2 and spread over so as to cover rubble and the like to form a covering stone. About 1 to 2 months after spreading, the growth of seaweed 3 could be confirmed on the concrete 1 for building the seaweed beds.

また、同様にして得られた藻場造成用コンクリート１を、図２に示すように、海水２中に投下して積み上げ、築磯材とした。積み上げて約１〜２ヵ月後には、藻場造成用コンクリート１に海藻３の成長を確認できた。   Moreover, as shown in FIG. 2, the concrete 1 for seaweed bed construction obtained similarly was dropped and accumulated in the seawater 2, and it was set as the koji material. About 1 to 2 months after stacking, the growth of seaweed 3 could be confirmed on the concrete 1 for constructing the seaweed bed.

また、円柱形の本発明の藻場造成用硬化物に、海藻の胞子が付着した種糸を巻きつけ、巻きつけられた種糸から海藻の新芽が約１０ｃｍ延びた後、種糸が巻きつけられた本発明の藻場造成用硬化物を、図１や図２に示す藻場造成用コンクリート１に配置することで、さらに海藻が増えやすくなる。
また、例えば、水槽に、海藻の胞子を含んだ海水を入れ、さらにその海水に糸を入れることで、海藻の胞子が付着した種糸を得ることができる。 In addition, a seed yarn having seaweed spores attached thereto is wrapped around a cylindrical shaped cured product of the seaweed bed of the present invention, and after about 10 cm of seaweed sprout is extended from the wound seed yarn, the seed yarn is wound. By placing the cured product for creating a seaweed bed of the present invention on the concrete 1 for creating a seaweed bed shown in FIGS. 1 and 2, seaweed can be further increased.
Further, for example, by putting seawater containing spores of seaweed into a water tank and further putting a thread into the seawater, seed yarns with attached seaweed spores can be obtained.

なお、フルボ酸鉄は本来、森林の腐植土壌中で生成されるものなので、海水を通す袋等に腐植土や、適宜鉄鋼スラグをも入れて土嚢と成し、この腐植土入り土嚢を海中に投下して藻場を造成することも考えられるが、堤防を築く際に用いられることから明らかなように、土嚢を積み上げても土嚢間に空隙を形成しにくく、しかも仮に腐植土内に混入している木材チップが腐敗しても、土嚢は固化していないので、コンクリート内の木材チップが腐敗したときのように、腐植土入り土嚢は多孔質化しない。
これに対して、本発明の藻場造成用コンクリートは、固化しており、表面形状が自然石形状であるので、図２に示すように積み上げた場合、藻場造成用コンクリート間には空隙が形成され、形成された空隙に魚が棲み付きやすくなる。また、藻場造成用コンクリート自体も、木材チップが腐敗して消失することで、木材チップの位置に孔が形成されて藻場造成用コンクリートが多孔質化し、藻場造成用コンクリートの表面に凹凸が形成されて海藻の種子が付着しやすくなる。 Since iron fulvic acid is originally produced in humus soil in forests, humus soil or steel slag is also put into sandbags as needed to pass seawater in bags, etc., and this sandbag containing humus soil is put into the sea. It is conceivable to create a seaweed bed by dropping it, but as it is clear from the fact that it is used when building a dike, even if the sandbags are stacked, it is difficult to form a gap between the sandbags. Even if the wood chip that rots down, the sandbag is not solidified, so the sandbag containing humus soil does not become porous like the woodchip in concrete decays.
On the other hand, since the concrete for seaweed bed construction of the present invention is solidified and the surface shape is a natural stone shape, when stacked as shown in FIG. It is formed, and it becomes easy for fish to bite into the formed gap. In addition, the concrete for seaweed basin itself also decays and disappears due to the decay of the wood chips, so that pores are formed at the positions of the wood chips and the concrete for seaweed basin creation becomes porous, and the surface of the concrete for seaweed basin construction is uneven. And seaweed seeds are more likely to adhere.

以上のように、本発明の藻場造成用コンクリートは、鉄鋼スラグと広葉樹チップを含んだ組成物の硬化物なので、広葉樹チップによってフルボ酸が放出され、鉄鋼スラグから放出される二価鉄イオンとフルボ酸が結合して、水溶性で寿命が長いと共に海水中で酸化しにくい安定したフルボ酸鉄を生成でき、従って、安定したフルボ酸鉄という形で効率的に二価鉄イオンを生物へ供給できる。   As described above, the seaweed building construction concrete of the present invention is a cured product of a composition containing steel slag and hardwood chips, so that fulvic acid is released by hardwood chips and divalent iron ions released from the steel slag. Combined with fulvic acid, water-soluble, long-lived and stable iron fluorate that is difficult to oxidize in seawater can be generated. Therefore, divalent iron ions are efficiently supplied to organisms in the form of stable iron fulvic acid. it can.

また、本発明の藻場造成用コンクリートは、単位容積質量が２〜３トン／ｍ３なので、海中に藻場造成用コンクリートを配置した場合、波があっても藻場造成用コンクリートが転がりにくい。 Moreover, since the unit mass of the seaweed bed building concrete of the present invention is 2 to 3 ton / m 3 , when the seaweed bed building concrete is disposed in the sea, the seaweed bed building concrete does not easily roll even if there is a wave. .

更に、本発明の藻場造成用コンクリートは、腐敗した広葉樹チップを含んだ組成物の硬化物なので、フルボ酸が放出されやすいと共に、広葉樹チップが腐敗して消失することで、広葉樹チップの位置に孔が形成されて藻場造成用コンクリートが多孔質化し、藻場造成用コンクリートの表面に凹凸が形成されて海藻の種子が付着しやすくなる。   Furthermore, since the concrete for algae bed construction of the present invention is a cured product of a composition containing spoiled hardwood chips, fulvic acid is easily released, and the hardwood chips decay and disappear, so that the hardwood chips are positioned. The pores are formed to make the algae bed construction concrete porous, and irregularities are formed on the surface of the algae bed construction concrete so that the seeds of seaweed are easily attached.

１ 藻場造成用コンクリート
２ 海水
３ 海藻 1 Concrete for creating seaweed beds 2 Seawater 3 Seaweed

Claims (8)

固化材と、
鉄鋼スラグと、
木材チップと、
水とを含む組成物の硬化物である
藻場造成用硬化物。 Solidifying material,
Steel slag,
Wood chips,
A cured product for seaweed bed construction, which is a cured product of a composition containing water. 単位容積質量が２〜３トン／ｍ３である
請求項１に記載の藻場造成用硬化物。 The cured product for creating seaweed beds according to claim 1, wherein the unit volume mass is 2 to 3 ton / m 3 . 表面形状が自然石形状である
請求項１または請求項２に記載の藻場造成用硬化物。 The cured product for seaweed formation according to claim 1 or 2, wherein the surface shape is a natural stone shape. 前記組成物が糞尿を含む
請求項１〜３のいずれか１つに記載の藻場造成用硬化物。 The hardened | cured material for seaweed bed creation as described in any one of Claims 1-3 in which the said composition contains manure. 前記固化材はセメントである
請求項１〜４のいずれか１つに記載の藻場造成用硬化物。 The hardened material for seaweed formation according to any one of claims 1 to 4, wherein the solidifying material is cement. 前記木材チップの少なくとも一部が腐敗した
請求項１〜５のいずれか１つに記載の藻場造成用硬化物。 The hardened | cured material for seaweed bed creation as described in any one of Claims 1-5 in which at least one part of the said wood chip was spoiled. 前記組成物は、腐葉土を含む
請求項１〜６のいずれか１つに記載の藻場造成用硬化物。 The hardened material for seaweed formation according to any one of claims 1 to 6, wherein the composition includes humus. 前記組成物は、炭を含む
請求項１〜７のいずれか１つに記載の藻場造成用硬化物。 The said composition contains charcoal. Hardened | cured material for seaweed bed creation as described in any one of Claims 1-7.
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