JPH04210535A - Method for cultivating seaweed - Google Patents

Abstract

PURPOSE:To remove microorganisms and cultivate seaweeds without inhibiting the growth of the seaweeds by dipping the seaweeds to which the microorganisms stick in an aqueous solution of an organic acid and then exposing the resultant seaweeds to the sun. CONSTITUTION:Seaweeds such as red algae or brown algae are cultivated in a water tank containing raw seawater placed therein. In the process, the aforementioned seaweeds are taken out of the water tank when microorganisms stick thereto and then soaked in an aqueous solution of an organic acid such as citric acid or fumaric acid at about several % concentration to attenuate the microorganisms. The above-mentioned seaweeds are then exposed to the sun for a prescribed time to dry or kill the microorganisms. The microorganisms are removed from the seaweeds, which are subsequently returned to the water tank to perform cultivation.

Description

[Detailed description of the invention]

[00011

[Industrial Application Field] The present invention relates to a method for cultivating seaweed such as red algae and brown algae in an aquarium. [0002] [0002] Seaweeds such as red algae and brown algae can be used as feed for livestock and seafood, food nutritional enhancers, chemicals, pharmaceuticals, raw materials for chemical industry, energy sources, etc. recent years,
It is being cultivated in aquariums other than the sea. [0003] As this cultivation method, there is a method of cultivating seaweed by attaching seaweed to a cultivation body substrate or floating the cultivation body with a net and immersing the cultivation body in flowing raw seawater in an aquarium. [0004]

[Problems to be Solved by the Invention] By the way, even if seaweed is cultivated in an aquarium other than the sea, since raw or filtered seawater is used as the cultivation water for seaweed, eggs and spores of microorganisms may grow together with seawater in the aquarium. , adults enter. For this reason, microscopic algae and animals may adhere to the surface of cultivated seaweed depending on the water quality, illuminance, and water temperature. As a result, the attached microscopic organisms absorb nutrients from the seaweed and block light from reaching the seaweed, causing cells in that area to die, making it easier for bacteria to attach, and inhibiting the growth of the seaweed. In particular, when cultivating in an aquarium, a flow is imparted to the seawater in the aquarium, but natural phenomena such as waves do not act, so microorganisms and the like are more likely to attach to seaweed than to seaweed that grows in the sea. [0005] Therefore, the present invention was made in consideration of such circumstances, and its purpose is to provide a seaweed cultivation method that makes it possible to cultivate seaweed without being affected by microorganisms. It is about providing. [0006]

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a method for cultivating seaweed in an aquarium containing raw seawater, in which when microorganisms adhere to the seaweed, The seaweed is removed from the aquarium, soaked in an organic acid aqueous solution, exposed to the sun, and then returned to the aquarium. [0007]

[Operation] After infiltrating seaweed with attached microorganisms in an organic acid aqueous solution, the attached microorganisms are removed from the seaweed by exposing it to the sun. In this way, even if microscopic animals or microscopic algae adhere to seaweed, the attached organisms can be removed from the seaweed, making it possible to cultivate seaweed without being too affected by microscopic organisms. [0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. (0009) In FIG. 1, 1 indicates an aquarium in which seaweed 2 such as red algae and brown algae is cultivated, and this aquarium 1 contains water (raw seawater 3).
It is constructed to store water and provide flow to the water. [00101 The seaweed 2 to be cultivated is attached to the cultivation @ 4 as a cultivation body substrate, and this cultivation shelf 4 is attached to a support 5 such as a cage that can be immersed in the stored water (raw seawater 3) in the aquarium 1. In the illustrated example, a plurality of them are held in a zigzag pattern. In addition, the cultivation substrate is
Any material may be used as long as it allows seaweed to adhere or float, such as a rope or a plastic cage. [00111 In addition, as shown in FIG.
A treatment tank 7 containing an aqueous solution 6 of an organic acid such as citric acid or fumaric acid (~3%) is provided. Although it does not have any effect on seaweed 2 such as brown algae and brown algae, it is an aqueous solution that weakens microorganisms. [0012]Now, as shown in FIG. 1(a), the water tank]
The raw seawater 3 is put into the tank 1 and a flow is applied to the raw seawater 3, and the support 5 holding the cultivation shelf 4 with the seaweed 2 attached thereto is immersed in the raw seawater 3 in the aquarium 1. Infiltrate into raw seawater 3. Then, the raw seawater 3 in the aquarium 1 is replaced at predetermined intervals, and the seaweed 2 is cultivated. [0013] During this cultivation, microscopic organisms enter the aquarium 1 together with raw seawater 3 that is being replaced, and the microscopic organisms become seaweed 2.
When the support 5 of the seaweed 2 is attached to the surface of the seaweed 2, the support 5 of the seaweed 2 is taken out from the aquarium 1, and as shown in FIG. Soak. [0014] After the immersion, the support 5 is taken out from the treatment tank 7 and placed in the sun for a predetermined time (as shown in FIG. 1(C)).
(about 0.5 to 2 hours), that is, expose the seaweed 2 to the sun for as long as the seaweed 2 does not die. After that, this support 5 is
Return it to the water tank 1 above. [0015] In this way, seaweed 2 with microorganisms attached
The microorganisms are removed from the seaweed 2 by immersing it in an organic acid aqueous solution 6 and drying it. That is, by immersing the seaweed 2 in the organic acid aqueous solution 6 for about 5 to 10 minutes, only the microorganisms are weakened without affecting the seaweed 2 in any way, and the weakened smiling organisms become the seaweed 2.
move away from Furthermore, even if the microorganisms do not separate from the seaweed 2 and are still attached to the seaweed 2 due to the immersion in the organic acid aqueous solution 6, the microorganisms become weakened due to the exposure of the seaweed 2 to the sun after immersion. Because of this, it easily dries out or dies and separates from the seaweed 2. As a result, microorganisms are removed from the seaweed 2. [0016] Therefore, even if microorganisms adhere to the surface of the seaweed 2 while cultivating the seaweed 2 in the aquarium 1, the microorganisms are removed from the seaweed 2 before they grow large. The seaweed 2 can be cultivated without being affected too much, that is, without inhibiting the growth of the seaweed 2. [0017]

[Effects of the Invention] In summary, according to the present invention, even if microorganisms adhere to seaweed while cultivating seaweed in an aquarium, the microorganisms are removed from the seaweed, so the influence of the microorganisms is reduced. It has the excellent effect of being able to grow seaweed without being exposed to water.

[Brief explanation of the drawing]

FIG. 1 is a diagram illustrating an embodiment of the seaweed cultivation method of the present invention.

[Explanation of symbols]

1 Aquarium 3 Raw seawater 6 Organic acid aqueous solution

Claims (1)

[Claims] Claim 1: In a method of cultivating seaweed in an aquarium containing raw seawater, when microorganisms adhere to the seaweed,
A method for cultivating seaweed, which comprises taking out the seaweed from the aquarium, infiltrating it with an organic acid aqueous solution, exposing it to the sun, and then returning the seaweed to the aquarium.