JPS6013648B2 - Seaweed cultivation method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a seaweed cultivation method in which algae and diseases are removed as much as possible and seaweed capable of producing high-quality dried seaweed is collected.

Generally, when cultivating seaweed, drying is carried out to exterminate algae and prevent and exterminate diseases, but in the case of floating aquaculture at farms facing the open ocean, drying is not easy and requires a great deal of labor and time. In addition, refrigeration treatment and chemical treatment are sometimes performed to get rid of algae, but these treatments have not been very effective in getting rid of so-called "green laver."

The present invention uses a net-shaped, sickle-shaped, or other type of seaweed cultivation tool that collects seedlings from seed nets, shells, etc. and attaches the seaweed that is being cultivated.
At the time of raising seedlings, the seedlings were immersed for 5 to 6 minutes in a treatment solution that added inorganic acids at appropriate times during the aquaculture process to give a speck of 1.0 to 4.0, and then returned to seawater and continued to be cultured. It provides seaweed cultivation characterized by extermination and prevention of algae and diseases, and in particular, it improves the black luster of healthy seaweed and prevents it from suffering from red rot, etc. It exhibits an outstanding effect of culling the seaweed that grows in it and exterminates "green seaweed."

Next, a specific implementation method of the method of the present invention will be explained in detail.

A seaweed net can be used as a culture vessel.

Nori silk is made of natural fibers such as hemp, stock columns, or vinyl chloride.
Synthetic fibers such as polyethylene and polypropylene, or resin-treated natural fibers, are used as the material. Using this seaweed silk, seedlings are collected based on a general method.

For example, put about 6 pieces of seaweed silk into a bag and search for seaweed seedlings. Seedling collection will be completed in 4 to 5 days.

In order to raise the seedlings in the seaweed net after seedling detection, the net is tied to a support shelf set up in the sea and a rope is tied to the net to raise the seedlings. It is desirable to perform the seaweed treatment of the present invention once or twice during seedling raising.

For seaweed processing, the seaweed silk is pulled onto the ship, and equipment is installed on the ship.
Adding an inorganic acid to water and adjusting the pH. The seaweed silk with seaweed spores attached is immersed in a liquid tank containing a treatment liquid adjusted to a concentration of 0 to 4.0.

Examples of inorganic acids added to the treatment solution include hydrochloric acid, nitric acid, sulfuric acid, and phosphoric acid.

The water in which the inorganic acid is dissolved is seawater or mixed seawater, and the concentration of the acid is determined by considering the strength of the acid, the degree of disease or algae, and the treatment time. When the treatment time is short, a relatively high concentration treatment liquid is used, and when the treatment time can be extended, a relatively dilute treatment liquid is used.

In general, in the case of inorganic acids, the pH is 1.0 to 4. More preferably pHI. Adjust the concentration of the treatment liquid to a range of 0 to 3.5.

Note that a pH buffer such as acetic acid or sodium acetate may be present in order to adjust the pH. Furthermore, ammonium chloride, ammonium nitrate, etc. can also be made to coexist in the treatment liquid as fertilizer for aquaculture.

Furthermore, the temperature of the treatment liquid may be room temperature of about 4° C. to 2 pm.

After the seaweed net is immersed in the treatment solution once or twice during seedling raising in this way, the seaweed silk is returned to seawater and picked through the normal marine cultivation process.

Even if the seedlings were immersed in the above-mentioned treatment solution once during seedling raising and harvested, no red rot disease was observed, the green seaweed died, and high-quality seaweed with a good black gloss could be bottled. can be obtained. It goes without saying that bamboo, rough-dyed seaweed minerals, etc., which have been conventionally used as seaweed cultivation tools, may also be used.

In the above embodiments, the case of immersion treatment with the treatment liquid during seedling raising was mentioned, but in the present invention, the treatment timing is after seedling detection in the normal aquaculture process, at the time of sprouting, at the time of seedling raising, or at one time or more during aquaculture. The treatment according to the present invention is applied appropriately and when necessary during the period from seedling collection to harvesting.

Usually, the treatment is carried out once or twice during the seedling-raising period, and various algae can be exterminated by this treatment.

In the aquaculture process, it is applied according to the occurrence of various algae and diseases, and if a lot of diatoms and green seaweed are attached, or when red rot occurs, the treatment according to the present invention will eliminate various algae, green seaweed, and red rot. As parts of the seaweed become bleached, turn white and die, healthy seaweed becomes increasingly black and shiny. The treatment time and the acid concentration of the treatment solution are selected and adjusted depending on the growth condition of the seaweed, for example, whether it is a small bud or a considerably grown seaweed, whether it has a large amount of algae attached, or the severity of the disease. When the seaweed has grown to a considerable extent, it is usually recommended to treat it for 3 to 9 minutes, preferably for about 5 to 60 minutes, and when the seaweed is in the form of small buds, it is recommended to treat it for about 5 to 3 minutes. Next, examples of the present invention will be described.

Example 1 A treatment solution was prepared by dissolving phosphoric acid in seawater to a concentration shown in Table 1. In the treatment solution, seaweed silk to which a mixture of seaweed straw and green seaweed was attached was soaked. The condition of the paste was observed after 20 minutes.

The results are shown in Table-1. Table 1 Example 2 The state of the seaweed after immersing the seaweed silk with a mixture of seaweed leaves and green seaweed in a treatment solution prepared by dissolving phosphoric acid in seawater and adjusting the concentration shown in Table 2. observed.

The results were as shown in Table-2. Table-2 Example 3 Dissolving phosphoric acid and ammonium chloride in seawater Table-3
The condition of the glue was observed after soaking the seaweed net to which a mixture of glue buildup and green glue was attached in the treatment solution adjusted to the concentration shown in .

The results were as shown in Table-3. Table 3 Example 4 Phosphoric acid was dissolved in seawater and the phosphoric acid concentration was 1. A treatment solution (pHI.7) with a weight percent of 100% was prepared, and seaweed silk with red rot disease was immersed in the treatment solution for 5 minutes, and immediately washed with seawater.

When this seaweed net was spread out again in seawater and cultivation continued, on the third day, the black seaweed that had red spots due to red rot had completely disappeared and turned black. The luster of the reeds and reeds increased, the leaves became active, and on the 10th day, black nori of good quality could be picked.

On the other hand, the untreated seaweed net had increased red spots due to red rot, and on the seventh day it was completely infected with bacteria and could not be removed.

Example 5 A test of the effect of bond soaking treatment was conducted under the following conditions.

The results were as shown in Table 4.

Situation of collecting seaweed nets On January 17, 1978, five nets were spread out on a support rack, and for the green seaweed test, only one net was left without killing the green seaweed.

Average size of seaweed buds: 4 to 5 skin long buds: 9.2 Gagaaonori 5Gaa Method of soaking in and out of seawater Dissolve the chemicals shown in Table 4 in 500cc of seawater, adjust the pH to 2.0, and immerse for a specified period of time (pH Items with a value outside of 2.0 are listed on the shelf).

2-5 times during immersion. Processing after immersion: Rinse with seawater 3 times to eliminate the effect of subsequent pH, and perform erythrosine staining (0.2% 99 seconds). Wash after erythrosine staining with seawater. Ta.

Table 4: Erythrosine staining determination Large buds and green nori were examined with the naked eye, and small buds were examined using a microscope.

Display of erythrosine determination The base of the leaf was set as 10% and the hollyhock body as 90%.

Therefore, if the leaf body is washed in the front, the percentage will be 90%, and if the base is dyed in the front, the percentage will be 10%. As can be seen from the above examples, seedlings are detected in a treatment solution with an inorganic acid added to adjust the pH to 4.0 or less, and the odor of seaweed cultivation, such as a net with seaweed during cultivation, is removed during sprouting, seedling raising, and cultivation during cultivation. If the green seaweed is brought into contact with the seaweed by immersion at the right time during the process, the necrosis rate of green seaweed will be extremely high.

Claims (1)

[Claims] 1 Seedlings are harvested and cultured. Seedlings are collected and cultured in net-shaped or square-shaped seaweed culture tools with seaweed attached, and inorganic acids are added at appropriate times during the cultivation process during sprouting, seedling raising, and cultivation to adjust the pH to 1.0 to 4.0. A seaweed cultivation method characterized in that the seaweed is immersed in a treated solution for 5 to 60 minutes and then returned to seawater for continued cultivation to exterminate and prevent miscellaneous algae and diseases.