JPH06153723A - Treating agent for laver culture and laver culture method - Google Patents

Abstract

PURPOSE:To provide a treating agent for laver culture containing zeolite together with an organic acid, an inorganic acid, an ammonium salt, etc., having remarkable effect for the elimination of diatom and the prevention and curing of blight in the culture of laver and effective for improving the quality and increasing the production of laver. CONSTITUTION:A laver cultivation net attached with laver spores is immersed, during the cultivation process from the sprouting to the picking of laver, into a treating agent solution containing 0.2-7.0wt.% of zeolite and at least one kind of substance selected from organic acid, inorganic acid, ammonium salt, etc., (e.g. phosphoric acid) to get highly remarkable effect on the extermination of diatom and the prevention and cure of blight. The drying operation of laver cultivation net becomes unnecessary to enable the saving of much labor and time, improve the quality of laver and increase its production.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a cultured seaweed treatment agent that treats a seaweed culture net in a seaweed culture process to exterminate algae and makes the cultured seaweed sound, and a seaweed culture using the treatment agent. Concerning the law.

[0002]

2. Description of the Related Art Generally, in the process of cultivating seaweed, the seaweed net is drained to control weeds, to prevent disease, and to control the disease, but in the case of floating culture in a farm facing the open sea. Draining work was not easy and required a lot of labor and time.

[0003] In order to reduce such work labor and work time, a technique has been developed in which the seaweed culture nets that have been collected are soaked in a citric acid solution during the culture period from sprouting to seaweed harvesting ( Japanese Patent Publication No. 60-13647). In addition, a technique has been developed in which an organic acid or an inorganic acid is added and the treatment is carried out in a treatment liquid having a pH of 1.0 to 4.0 (Japanese Patent Publication No. 60-136).
48, Japanese Patent Publication No. 60-31451).

[0004]

These techniques eliminate the labor of lifting the seaweed aquaculture net above the surface of the water, and make it possible to exterminate algae that are difficult to dry out, and to make black seaweed healthy and to prevent diseases. It was possible to increase the yield of good quality seaweed by preventing various problems and improving various effects such as improving black gloss.

However, when a plain aqueous solution of citric acid or the like is used, although it is possible to kill blue seaweed, filamentous fungi, various algae such as diatoms, and various fungi, nori seaweed nets and nori leaf bodies contain these substances. There was a drawback that the carcasses remained attached and deteriorated the quality of seaweed.

[0006]

Means for Solving the Problems The present inventors have paid attention to such points and have a high cleaning effect by which dead bodies of algae and fungi can be easily removed from the nori culture net and the nori leaf bodies. This is the development of a treatment agent for cultured seaweed and a seaweed cultivation method using this treatment agent.

That is, the first aspect of the present invention provides a treating agent for cultured seaweed containing zeolite and at least one selected from organic acids, inorganic acids and ammonium salts. A second invention according to claim 2 is a seaweed aquaculture method using the treatment agent for cultured seaweed according to the first invention, wherein the seaweed aquaculture net to which the seaweed spores are attached is picked from the nori seaweed. In the aquaculture process, the seaweed aquaculture method is characterized by dipping in a treatment agent solution containing 0.2 to 7.0% by weight of zeolite and at least one selected from organic acid, inorganic acid and ammonium salt. Is provided.

The treatment agent for cultured seaweed and the seaweed culture method of the present invention have excellent effects on exterminating algae such as removal of diatoms, prevention of diseases such as filamentous fungi and red gusset disease, and extinction. With respect to seaweed, the effect of further increasing the black luster is exhibited, and high-quality seaweed can be produced in high yield.

First, the treatment agent for cultured seaweed according to the first invention will be described.

The zeolite used is a known aluminosilicate having a generally three-dimensionally developed skeleton structure, and in the general formula, xM _{2 / n} O.Al ₂ O ₃ .ySi.
Represented by O ₂ · zH ₂ O (M is an alkali or alkaline earth metal atom), natural zeolites such as anarsine, chabazite, clinoptilolite, erionite, phosagisite, mordenite, phillipsite, type A zeolite, It is roughly classified into synthetic zeolites such as X-type zeolite and Y-type zeolite. Zeolites can be obtained in powder form, and synthetic zeolites are generally used.

As the organic acid, citric acid, malic acid, tartaric acid, fumaric acid, phytic acid, acetic acid, glycolic acid, glyceric acid, lactic acid, maleic acid, diglycolic acid or the like can be used. , Phosphoric acid, hydrochloric acid, sulfuric acid, nitric acid and the like can be used. As the ammonium salt, ammonium chloride, ammonium nitrate, ammonium sulfate or the like can be used.

The amount of these compounds used in combination is 0.2 to 7.0, preferably 0.5 to 5.0, in terms of molar ratio with respect to the zeolite.

Further, a minute amount of a phosphorus component such as sodium phosphate and calcium phosphate and a mineral component such as iron, zinc, copper and calcium may be added to the treatment agent of the present invention as a fertilizer or a nutrient. In addition, these mineral components,
Generally, it is chelated with EDTA and added.

The treating agent of the present invention can be prepared by mixing the above-mentioned components. When the acid is in a liquid state, the zeolite is a mixture with other additive components,
It is preferable that the acid is used as an aqueous solution having an appropriate concentration and both are dissolved in water before use.

In the present invention, the term "cultured seaweed" means seaweed in the culture process, and more specifically, it refers to seaweed in the process from seedling to seaweed plucking after seedling is collected in a seaweed culture net. And

Next, the nori culturing method according to the second invention will be described. This nori culturing method is characterized by treating the cultured nori using the treatment agent for the cultured nori according to the first invention. It can be used in addition to the conventional seaweed cultivation means. Hereinafter, the seaweed culture method of the present invention will be described with reference to an example.

[0017] Synthetic fibers such as vinylon, nylon, polyester, polyethylene and polypropylene, or those obtained by subjecting these fibers to resin processing are used to produce a seaweed cultivation net, and about 30 to 60 sheets of this seaweed cultivation net are stacked. Mounted on a pillar fence, 4 ~ along with seashells where nori spores live
Collect seedlings for 5 days.

The seaweed aquaculture net from which the seedlings have been collected is reattached to the pillar fences, and the process of sprouting begins. After the start of sprouting, the seaweed aquaculture method of the present invention using the treatment agent of the first invention is carried out at appropriate times depending on the state of the seaweed. That is, when nori seaweed, diatoms, etc. adhere to the seaweed cultivation net, or when a disease such as red gusset occurs, it is carried out. The nori culture method of the present invention may be carried out twice.

The treatment agent aqueous solution used in the seaweed aquaculture method of the present invention is prepared by dissolving zeolite and at least one selected from organic acids, inorganic acids and ammonium salts in seawater to obtain a zeolite concentration of 0.2 to 7.0% by weight. %, Preferably 0.5-
It is set to 5.0% by weight. If necessary, an acid or an alkali may be further added to adjust the PH.

Further, the treatment agent aqueous solution may be kept at room temperature of about 4 to 20 ° C., and the seaweed cultivation net is immersed in this treatment agent aqueous solution for treatment. The immersion treatment time is appropriately adjusted depending on the concentration of components in the treatment agent aqueous solution, the PH value of the treatment agent aqueous solution, the degree of growth of seaweed, the amount of adhering algae, etc. -30 minutes, 10-60 minutes for 3-10 cm laver buds, 30-90 minutes for grown laver.

The seaweed aquaculture net is immersed in the treatment agent aqueous solution for the above-mentioned predetermined time, then returned to the seawater again and stretched on a prop fence or a floating raft. If necessary, such work is carried out in place of or together with the draining work until the seaweed is plucked.

The seaweed aquaculture method according to the present invention is carried out after seedling collection in a normal aquaculture process, at the time of sprouting, seedling raising, or one or more seasons during aquaculture. It may be carried out appropriately and when necessary. According to the seaweed aquaculture method of the present invention, even when subjected to a single immersion treatment in the treatment agent aqueous solution during seedling raising, diatoms fall off, red gusset disease is not seen, good quality seaweed with black gloss An effect such as plucking is exhibited.

Usually, it is preferable to perform the treatment by the seaweed aquaculture method according to the present invention once or twice during the seedling raising period, whereby diatoms can be shed and bacteria causing red gusset and the like can also be removed. . Also, if diatoms are attached in the aquaculture process, and if treatment is carried out by the nori culture method according to the present invention depending on the state of disease occurrence, nori culturing nets, diatoms attached to the nori leaf bodies will fall off, and the red glazed part will While being bleached and whitened and killed, healthy black seaweed further increases its black luster and can produce a large amount of good quality seaweed.

In the above description, the example in which the dipping method is adopted as the method for treating the seaweed cultivation net with the aqueous solution of the treating agent has been described. However, instead of this, a spray spraying method may be employed. The seaweed cultivation net is kept in contact with the aqueous solution of the treatment agent for a predetermined treatment time evenly. When the nori culture net is brought into contact with the treatment agent aqueous solution by the spray spraying method, it is necessary to take sufficient care not to change the concentration of the treatment agent aqueous solution due to drying or to prevent contact unevenness of the treatment agent aqueous solution.

[0025]

EXAMPLES Next, specific examples of the seaweed aquaculture method according to the present invention will be described.

[Example 1] Synthetic zeolite and phosphoric acid were added to prepared seawater so as to have a predetermined concentration to prepare an aqueous solution of a treatment agent, and a seaweed aquaculture net in which nori leaf bodies and diatoms were mixed and adhered was indoors treated as described above. It was immersed in the agent aqueous solution. After soaking for 30 minutes, the results of observing changes in the state of the black seaweed thalli and diatoms are shown in Table 1.

[0027]

[Table 1]

As can be seen from Table 1, as the concentration of the synthetic zeolite increased, the rinsing effect also increased, and there was no change in the black seaweed leaf body, but most of the diatoms died and fell off.

[Example 2] Synthetic zeolite and citric acid were added to prepared seawater so as to have a predetermined concentration to prepare an aqueous solution of a treatment agent, and a seaweed aquaculture net in which nori leaf bodies and diatom were mixed and adhered was indoors treated as described above. It was immersed in the agent aqueous solution. After soaking for 30 minutes, the results of observing changes in the state of the black seaweed thalli and diatoms are as shown in Table 2.

[0030]

[Table 2]

As can be seen from Table 2, as the concentration of the synthetic zeolite increased, the rinsing effect also increased, and there was no change in the black seaweed leaf body, but most of the diatoms died and fell off.

[Example 3] [Comparative Example 1] A treating agent prepared by dissolving 0.5% by weight of synthetic zeolite, 0.2% by weight of phosphoric acid and 0.2% by weight of ammonium chloride in 10 l of seawater. Aqueous solution (Solution A, PH5.7)
And a treatment solution (solution B, PH 2.3) in which 10 wt. Of citric acid and 0.5 wt% of ammonium chloride were dissolved in seawater were prepared. Using a seaweed cultivation net that was cultivated on the sea surface of Kisarazu City, Chiba Prefecture, where diatoms were generated and red gusset was generated on the seaweed, this seaweed cultivation net was cut into 20 pieces of the same size and size. After 10 pieces of the cut pieces were successively immersed in the solution A for 20 minutes each, and then stretched on the sea surface again, the 10 pieces of the cut pieces were sequentially immersed in the solution B for 20 minutes each, and then again on the sea surface. Table 3 shows the results of observing the treatment effect on the fifth day after the stretching.

[0033]

[Table 3]

As can be seen from Table 3, the diatom removal effect of treating the seaweed culture net with the treatment agent aqueous solution (Solution A) is extremely better than that of the treatment liquid (Solution B). It turned out that the medicinal effects were great.

[Example 4] [Comparative example 2] A treatment agent aqueous solution (solution C, PH 7.5) in which 0.5% by weight of synthetic zeolite and 0.5% by weight of ammonium chloride were dissolved in 10 l of seawater. And a treatment solution (solution D, PH1.5) in which 10% of seawater was dissolved with citric acid at 0.5% by weight and ammonium chloride at 0.5% by weight. [Example 3] Similar to [Comparative Example 1], each of 10 pieces of cut mesh pieces was dipped in the solution C and the solution D and then stretched again on the sea surface. The results of observing the treatment effect are shown in Table 4.

[0036]

[Table 4]

As can be seen from Table 4, the effect of removing the diatom when the seaweed culture net is treated with the aqueous solution of the treating agent (Solution C) is much better than that with the treating solution (Solution D). It turned out that the medicinal effects were great.

[Example 5] [Comparative Example 3] An aqueous solution of a treating agent (solution E, PH1.1) in which 10% of synthetic water and 7.0% by weight of synthetic zeolite and 40% by weight of phosphoric acid were dissolved, respectively, 50 wt% phosphoric acid in 10 liters of seawater
An aqueous solution (solution F, PH 0.5) was prepared so that In the case where the treatment was carried out in the same manner as in [Example 3] [Comparative Example 1] except that each of the 10 pieces of the cut mesh pieces was dipped in the solution E and the solution F for 5 minutes, respectively, The results of observing the treatment effect on the day were as shown in Table 5.

[0039]

[Table 5]

As can be seen from Table 5, the effect of removing the diatom when the seaweed culture net is treated with the aqueous solution of the treating agent (Solution E) is much better than that with the treating solution (Solution F). It turned out that the medicinal effects were great.

[Example 6] [Comparative Example 4] A treating agent prepared by dissolving 0.2% by weight of synthetic zeolite, 0.2% by weight of citric acid, and 0.2% by weight of ammonium chloride in 10 l of seawater. Aqueous solution (Solution G, PH4.5)
And a treatment solution (solution H, PH 2.4) in which 10% of seawater was dissolved with 0.2% by weight of citric acid and 2% by weight of ammonium chloride were prepared. In the case where the treatment was carried out in the same manner as in [Example 3] [Comparative Example 1] except that each of the 10 pieces of the cut mesh pieces was dipped in the solution G and the solution H for 30 minutes, respectively, The results of observing the treatment effect on the day were as shown in Table 6.

[0042]

[Table 6]

As can be seen from Table 6, the diatom removal effect of treating the seaweed culture net with the treatment agent aqueous solution (Solution G) is extremely better than that of the treatment liquid (Solution H). It turned out that the medicinal effects were great.

[0044]

EFFECT OF THE INVENTION The treatment agent for seaweed nori and the seaweed culture method according to the present invention are used to control and prevent diatoms and diseases in seaweed culture.
It has a great effect on healing, improves the quality of seaweed, and can increase production.

Claims (2)

[Claims] 1. A treatment agent for cultured seaweed containing zeolite and at least one selected from organic acids, inorganic acids and ammonium salts. 2. In the aquaculture process from sprouting a laver spore-attached laver culture net to picking laver, at least 0.2 to 7.0% by weight of zeolite and at least one selected from organic acids, inorganic acids and ammonium salts. A seaweed aquaculture method characterized by dipping in a treatment solution containing one kind.