JP2003333947A - Method for culturing marine algae - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To give artificial ebbs and flows on land to develop the characteristics of a marine alga living in an intertidal zone, thus efficiently culturing the marine alga. <P>SOLUTION: A net on which the leaf bodies or spores of the marine alga are embedded is vertically disposed on the land instead of the inside of a water tank container. Ocean deep water is poured on the net to immerse the net in the water. A pump used for pouring the water is controlled to expose the marine alga to air for an arbitrary time, thus giving automatically giving the ebbs and the flows to the marine alga. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for automatically culturing a large amount of seaweed on land all year round.

[0002]

2. Description of the Related Art Conventionally, seaweeds that grow on leaf bodies cannot easily maintain the health of the leaf bodies for a long time because the flow and the water quality of the culture solution are likely to change in a closed container such as a test tube. It is also difficult to culture in large quantities. Cultivation in a large aquarium requires a large amount of mechanical equipment and cost to maintain the water quality in the aquarium, and it is impossible to grow healthy leaf bodies except for a variety such as Aonori that has a wide range of optimum environment. It was The seaweeds that live in the intertidal zone grow regularly exposed to the air in the tide twice a day, and have acquired the characteristic of withstanding dryness. On the contrary, in the conventional culture method, the cells are cultured without being exposed to the air, the cell activity is decreased, and the cell wall is thickened by 2 to several times. As for the method of growing the leaves, whether the leaves are suspended in the aquarium (see, for example, JP-A-5-192049),
In general, a culture system in which a leaf-attached culture net is stretched horizontally is used (see JP-A-7-163254), and the contact efficiency of individual leaf bodies with the culture solution is poor. The size of the culture net is also limited within the aquarium container. Large-scale culture on land requires a seawater tank as large as possible in a vast area, and a larger amount of seawater must be maintained and managed. When the leaf length of seaweed exceeds 50 cm, a large device is required to lift the leaf into the air, and even if it is lifted, the leaf is difficult to dry in the container. The leaf seaweeds that grow in the natural intertidal zone have a soft texture due to the effects of dryness,
Good humor. It has a high content of free amino acids and nucleic acids as taste components, making it delicious to eat. Contrary to this, the leaves that do not dry out are hard and tasteless. Conventionally, the method of culturing leaf bodies in an aquarium has not been put into practical use as an edible one because the characteristics of the leaf body are not taken into consideration and the original taste and softness of the leaf body are lacking.

[0003]

In culturing seaweeds on land, since the nets on which the leaf bodies have grown are stuck on the water surface, the size of the culture net is limited to the area of the water tank of the culture vessel. It takes a lot of land and a lot of money to expand the aquarium area. Management of seawater in the aquarium is also difficult, and efficient cultivation is not possible compared to the seaweed aquaculture area on the coast.

[0004] When the seaweed leaves are floated and cultured in the water tank, the drought seen in the natural intertidal zone cannot be automatically removed, and it is difficult to dry and grow the leaves even in a short time.

The present invention raises efficiency by constructing a culture net having a limited area on land and having a size larger than that area in a spatially vertical manner, and increases the efficiency by controlling a pump for injecting water into the culture net. The subject is to take out the drainage automatically in time and express the characteristics of the seaweeds that live in the intertidal zone so that they can be cultured.

[0006]

In order to solve the above-mentioned problems, the present invention does not impregnate the nets on which the leaves or spores of seaweed have adhered into the culture solution in the aquarium container, and makes them perpendicular to the atmosphere. Alternatively, it is built with an inclination and seawater is poured from above. This immerses the net in seawater. The water retention time of this seawater flow can be adjusted by the size and structure of the mesh. When the net is inclined, the net can be immersed in seawater by attaching a net and a support plate. As a result, it is possible to grow foliage or spores of seaweed that has adhered to the net.

By constructing a culture net with a vertical or slant, a culture net larger than the area on land can be installed, and the seawater injected into this net is rich in eutrophication, low temperature stability and cleanliness. Using deep seawater, healthy leaf bodies can be cultured all year round.

The deep sea water that has been once injected is recovered by immersing the culture net and then circulated so that it can be used again for water injection.

Physical and chemical factors such as water temperature, salt concentration, nutrient concentration, pH, etc. of seawater in which seaweed are cultivated are liable to change, and in order to adjust these factors, deep seawater of raw water is newly added. And control according to changes in factors.

The culture net can be exposed to the air by automatically stopping the pouring of the deep sea water that is pouring into the culture net. The drying time can also be set arbitrarily.

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will now be described based on examples with reference to the drawings.

In FIG. 1, the deep sea water pumped from one pump in twelve aquariums is composed of two vinyl chloride pipes and five vertically-arranged culture nets having a width of 90 cm and a height of 125 cm. A water tank having a depth of 5 cm, a width of 8 cm and a length of 90 cm is attached parallel to the upper end of the slanted 8 mesh width of 90 cm and a length of 130 cm according to claim 2 on which the vinyl chloride pipe of 3 is attached. Holes having a diameter of 5 mm are formed at intervals of 5 cm, and pouring is performed so that a difference in water level does not occur at the part of this water tank. The side of the water tank on the net side is lower than the other surfaces, and the poured deep sea water overflows from the water tank and flows out to the net on average. The culture net attached with the water retention net of 6 is immersed, and the water tank for collection 10 flows into 110 cm in length × 130 cm in width × 7 cm in height. The water level of the water tank for recovery is low, and 11 drains of 20 cm wide and 7 cm high are provided at one end. Deep seawater flows down from here, and the 12 vertical 43 cm x 50 c provided below it.
It collects in a water tank of m × 35 cm in height. A pump is installed in this, and it pumps up to the upper part of the net again to circulate deep seawater as described in claim 3. In order to maintain the environmental factors of seawater, new deep seawater is added to the recovery tank to suppress changes in environmental factors.

The pump power source according to claim 4 has one
The timer of 3 is connected, the pump is stopped arbitrarily,
Draining is performed by exposing the culture net to the air.

[Examples] Width 9 in which shell spores settled from 10 to 30 red seaweed filamentous filamentous filaments per mm of culture net thread were settled
In a culture experiment of 0 cm × 125 cm length net, the submersible pump lift was 5 m, the flow rate was 80,000 cm ³ / m, and the water temperature was 15-1.
It was confirmed that the spores were grown to 32 leaf cells at all sites of the omentum after 7 days at 9 ° C. and a drought time of 3 hours from 8 am to 11 pm each morning and evening. In addition, the growth of nets on which leaf lobes of the genus Amanori averaged 5 cm grew up to an average leaf length of 20 cm in 14 days under the same culture conditions, and all of them became soft leaves, and the total weight of the net was 150 g in terms of wet weight of algal cells. A yield of was obtained.

[0013]

The culturing method of the present invention has the following effects due to the constitution described above. A huge tank like the conventional one becomes unnecessary, and without floating the seaweed leaves in the seawater in the culture vessel, the seaweed leaves that are spatially arranged or the seaweed is transferred to the culture net that has spores grown. The seaweed thalli can be grown by pouring water and immersing it.

It is possible to cultivate a large amount of leaf bodies having the characteristics of seaweeds that live in the natural intertidal zone by controlling the culture seawater under optimum conditions for seaweeds while performing periodic artificial draining. .

[Brief description of drawings]

FIG. 1 is an elevational view showing an embodiment of the present invention.

[Explanation of symbols]

1 pump 2 Vinyl chloride pipe 3 Vinyl chloride pipe with water discharge hole 4 running water tank 5 vertical net 6 water retention net 7 Support angle 8 inclined net 9 Support plate 10 Recovery water tank 11 drainage holes 12 aquarium 13 timer

Continued front page    (72) Inventor Ryuta Terada             4-50-20 Shimoarata, Kagoshima City, Kagoshima Prefecture             Faculty of Fisheries, Kagoshima University (72) Inventor Masao Ohno             Kochi University, 194 Ijiri, Usa Town, Tosa City, Kochi Prefecture             Marine Biological Education and Research Center F-term (reference) 2B026 AA01 AA05 AB09 AD01

Claims (4)

[Claims] 1. A culture characterized by vertically constructing a net on which leaf bodies or spores of seaweed have been grown in the atmosphere, pouring seawater into the net, and immersing the net to grow seaweed. Method. 2. The culture method according to claim 1, wherein the net can be installed at an angle of up to 60 ° in the seaweed culture method. 3. A method for cultivating seaweed, characterized in that deep seawater is poured from the upper part of the net and is circulated in order to immerse the net with the attached leaf bodies or spores in the seawater. 4. The method for culturing according to claim 3, characterized in that the artificial seawater is removed by automatically shutting off the circulating deep seawater and exposing the culturing net to the air for an arbitrary time.