Method and device for cultivating eelgrass

Abstract

To provide a method and a device for cultivating eelgrass that are able to germinate eelgrass seeds at any time of the year and promote the growth of eelgrass leaves after the germination.SOLUTION: A germination case 60 stores germination water. Condensation water generated on an outer surface of a tank 10 by cooling with a tank cooler 20 is collected inside a container 70. The germination case 60 is cooled with the condensation water accumulated in the container 70. Pots 11 containing the planted eelgrass after germination are submerged in the tank 10 to promote growth of eelgrass leaves. Eelgrass seeds before germination are put into the germination case 60 for germination of the seeds.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a method for germinating and growing eelgrass seeds regardless of the season, and to an apparatus for implementing this method. [Background technology]

[0002] Up until now, I have invented products to solve problems for my family and for myself. However, this time I wanted to broaden my horizons and think about something that would be useful not only to specific people such as myself and my family, but to society as a whole. When I looked into current social issues, the keyword "environmental issues" caught my eye. Among them, while researching various issues related to the ocean, I learned about the existence of a seed plant called "Zostera marina". Zostera marina is a plant that lives in shallow seas. It absorbs and grows nutrients such as phosphorus and nitrogen from the sea, which promotes the purification of seawater quality, produces oxygen through photosynthesis, and improves the habitat of organisms that gather young fish and shellfish through the growth of Zostera marina. It is an important plant that is also called the "cradle of the sea". However, in recent years, the amount of Zostera marina has been decreasing due to environmental destruction such as sea reclamation, decreased transparency of seawater, and the inflow of chemicals. If the amount of Zostera marina decreases, it will have a major impact on marine life. Therefore, I thought that it would be a good idea to artificially germinate and grow Zostera marina at any time of the year to increase its number. First, we investigated how eelgrass germinates and grows. As a result, we learned that eelgrass is a seed plant, so its seeds are dropped into the ocean between spring and June, and are carried into the sand by waves and other factors, where they mature between October and November, germinate between December and February, and grow in winter, repeating the natural growth cycle. Furthermore, Patent Document 1 proposes a method of creating a eelgrass bed ecosystem that includes zebra grass by identifying the conditions for germinating zebra grass seeds at a high germination rate and the conditions for successfully propagating zebra grass to repair and regenerate eelgrass beds. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2012-90599 A Summary of the Invention [Problem to be solved by the invention]

[0004] In the natural environment, eelgrass only germinates at a certain time (winter), and due to environmental destruction it has become difficult for its seeds to germinate and grow naturally. We thought that if we could somehow make eelgrass germinate and grow at any time throughout the year, we could return a lot of grown eelgrass to the sea.

[0005] The purpose of the present invention is to germinate eelgrass at any time throughout the year and to cultivate the eelgrass leaves after germination. [Means for solving the problem]

[0006] The method for cultivating eelgrass of the present invention described in claim 1 is a method for cultivating eelgrass using an aquarium 10 for storing seawater, an aquarium cooler 20 for cooling the seawater, an aeration device 30 for supplying oxygen to the seawater, a purification device 40 for purifying the seawater, an LED irradiation device 50 for irradiating light into the aquarium 10, a container 70 for placing the aquarium 10 inside, and a germination case 60 for placing the aquarium 10 inside the container 70. Germination water is stored in container 60, condensation water generated on the outer surface of the water tank 10 due to cooling by the water tank cooler 20 is stored inside container 70, the germination case 60 is cooled by the condensation water stored inside container 70, pots 11 in which germinated eelgrass is planted are submerged inside the water tank 10 to allow the eelgrass leaves to grow, and pre-germinated eelgrass seeds are placed in germination case 60 and the seeds are allowed to germinate. The present invention as described in claim 2 is characterized in that, in the method for cultivating eelgrass as described in claim 1, the eelgrass seeds before germination are matured in seawater at a temperature of 25°C or higher. The present invention as described in claim 3 is characterized in that, in the method for cultivating eelgrass as described in claim 1, fresh water to which fertilizer containing nitrogen and phosphate or rice vinegar has been added is used as the germination water. The present invention as described in claim 4 is characterized in that, in the method for cultivating eelgrass as described in claim 1, carbonated water is used as the germination water. The present invention as described in claim 5 is characterized in that, in the method of cultivating eelgrass as described in claim 1, the germination case 60 is kept at a temperature in the range of 16°C to 22°C by using the condensation water. The eelgrass cultivation device of the present invention as described in claim 6 comprises an aquarium 10 for storing seawater and growing eelgrass leaves after germination, an aquarium cooler 20 for cooling the seawater, an aeration device 30 for supplying oxygen to the seawater, a purification device 40 for purifying the seawater, an LED irradiation device 50 for irradiating light into the aquarium 10, a germination case 60 for storing germination water and germinating eelgrass seeds before germination, and a container 70 for placing the aquarium 10 and the germination case 60 inside, wherein condensation water generated on the outer surface of the aquarium 10 due to cooling by the aquarium cooler 20 is stored inside the container 70, and the germination case 60 is cooled by the condensation water stored inside the container 70. Effect of the Invention

[0007] According to the eelgrass cultivation method of the present invention, condensation water that forms on the outside of the aquarium is stored inside the container and the germination case is cooled by the condensation water stored inside the container, allowing eelgrass leaves to grow in the aquarium and eelgrass seeds to germinate in the germination case, making it possible to germinate and grow eelgrass at any time of the year and allowing large amounts of grown eelgrass to be returned to the sea. [Brief description of the drawings]

[0008] [Figure 1] Photograph showing an eelgrass cultivation device according to one embodiment of the present invention. [Diagram 2] Photographs of the containers, tanks, and germination cases used in the eelgrass cultivation device [Diagram 3](a) is a photograph of the eelgrass we brought back, and Figures 3(b) and 3(c) are photographs of the maturation period of eelgrass seeds. [Figure 4] Table showing maximum daytime temperatures during the 60-day maturation period [Diagram 5] Photographs to explain the germination experiment [Figure 6] Table showing the results of the germination experiment [Figure 7] Table showing the results of investigating the effect of light on germination [Figure 8] A table showing the results of an experiment in which the ingredients of the liquid used for germination were changed. [Figure 9] A table showing the results of an experiment investigating the effect on germination of water modified with the water quality improving ceramics contained in the "healthy drink" used in Figure 6. [Figure 10] A table showing the results of an experiment investigating the effect of apple cider vinegar, contained in the "healthy drink" used in Figure 6, on germination. [Figure 11] A table showing the results of further experiments examining the effect of different liquids on germination DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] A method for cultivating eelgrass according to a first embodiment of the present invention is a method for cultivating eelgrass that uses an aquarium for storing seawater, an aquarium cooler for cooling the seawater, an aeration system for supplying oxygen to the seawater, a purification device for purifying the seawater, an LED irradiation device for shining light into the aquarium, a container for placing the aquarium inside, and a germination case for placing the aquarium together with the aquarium inside the container, in which germination water is stored in the germination case, condensation water that occurs on the outside of the aquarium due to cooling by the aquarium cooler is stored inside the container, the germination case is cooled by the condensation water that has accumulated inside the container, a pot in which germinated eelgrass is planted is submerged inside the aquarium to allow the eelgrass leaves to grow, and unsprouted eelgrass seeds are placed in the germination case and the seeds are allowed to germinate. In this way, condensation water that forms on the outside of the aquarium is stored inside the container and the germination case is cooled by the condensation water that has accumulated inside the container. This allows eelgrass leaves to grow in the aquarium and eelgrass seeds to germinate in the germination case. This makes it possible for eelgrass to germinate and grow at any time of the year, and allows large amounts of grown eelgrass to be returned to the sea.

[0010] A second embodiment of the present invention is a method for cultivating eelgrass according to the first embodiment, in which the eelgrass seeds before germination are matured in seawater at a temperature of 25°C or higher. In this way, it is possible to mature the eelgrass seeds before they germinate, so there is no need to collect the flowering branches that live in the sea.Instead, it is possible to use the eelgrass that has washed up on the beach to germinate and grow it without damaging the wild eelgrass.

[0011] A third embodiment of the present invention relates to a method for cultivating eelgrass according to the first embodiment, and uses fresh water to which fertilizer containing nitrogen and phosphorus or rice vinegar has been added as the germination water. In this way, by using fresh water with added fertilizer containing nitrogen and phosphorus or rice vinegar as the germination water, the number of days until germination was reduced compared to when using seawater.

[0012] A fourth embodiment of the present invention uses carbonated water as the germination water in the eelgrass cultivation method according to the first embodiment. In this way, by using carbonated water as germination water, we were able to reduce the number of days it took for seeds to germinate compared to using seawater.

[0013] A fifth embodiment of the present invention is a method for cultivating eelgrass according to the first embodiment, in which the germination case is kept at a temperature in the range of 16°C to 22°C by using condensation water. In this way, condensation water can be used to create a temperature that promotes germination.

[0014] A sixth embodiment of the eelgrass cultivation device of the present invention uses an aquarium for storing seawater in which sprouted eelgrass leaves grow, an aquarium cooler for cooling the seawater, an aeration system for supplying oxygen to the seawater, a purification device for purifying the seawater, an LED irradiation device for shining light into the aquarium, a germination case for storing germination water and germinating unsprouted eelgrass seeds, and a container for placing the aquarium and the germination case inside, and condensation water that forms on the outside of the aquarium due to cooling by the aquarium cooler is stored inside the container, and the germination case is cooled by the condensation water stored inside the container. In this way, condensation water that forms on the outside of the aquarium is stored inside the container and the germination case is cooled by the condensation water that has accumulated inside the container, allowing eelgrass leaves to grow in the aquarium and eelgrass seeds to germinate in the germination case, making it possible for eelgrass to germinate and grow in the home itself. EXAMPLES

[0015] Figures 1 and 2 are photographs showing the eelgrass cultivation device of the present invention. Figure 1(a) is a photograph of the entire device, Figure 1(b) is a photograph of the device with the LED turned on, and Figure 1(c) is a photograph of the device covered with a light-shielding material. Figure 2 shows photographs of the container, aquarium, and germination case, with Figure 2(a) being a photo taken at an angle from above and Figure 2(b) being a photo taken from above. As shown in Figure 1, the eelgrass cultivation device comprises an aquarium 10 which stores seawater and grows eelgrass leaves after germination, an aquarium cooler 20 which cools the seawater, an aeration unit 30 which supplies oxygen to the seawater, a purification unit 40 which purifies the seawater, an LED irradiation unit 50 which shines light into the aquarium 10, a germination case 60 (see Figure 2) which stores germination water and germinates eelgrass seeds before they germinate, and a container 70 in which the aquarium 10 and the germination case 60 are placed. The LED irradiation device 50 is positioned above the aquarium 10 at a specified distance from the aquarium 10. By separating the LED irradiation device 50 from the aquarium 10, the effect of heat from the LEDs is reduced. The LED irradiation device 50 sets the irradiation time using a timer 51. As shown in FIG. 1( c ), the aquarium 10 , the germination case 60 , the container 70 , and the LED irradiation device 50 can be covered with a light-shielding material 80 . In this way, by covering the water tank 10, the germination case 60, the container 70, and the LED irradiation device 50 with the light-shielding material 80, the light environment can be controlled by the LED irradiation device 50 without being affected by indoor lighting. In addition, the influence of the LED irradiation device 50 on the occupants can be eliminated.

[0016] As shown in FIG. 2, the aquarium 10 is placed in a container 70, and the germination case 60 is placed in the empty space of the container 70. Seawater in aquarium 10 is cooled by aquarium cooler 20. The cooling by aquarium cooler 20 causes condensation water to form on the outer surface of aquarium 10. The condensation water that forms on the outer surface of aquarium 10 is stored in container 70. A in Figure 2(a) is the water surface of the condensation water that has accumulated in container 70. The germination case 60 is cooled by condensation water that accumulates inside the container 70. Pre-germinated eelgrass seeds are placed in the Germination Case 60 along with germination water. In the Germination Case 60, the seeds are germinated. The unsprouted eelgrass seeds placed in the Germination Case 60 are aged in seawater at a temperature of over 25°C. Because the unsprouted eelgrass seeds can be aged in this way, there is no need to collect flowering branches that live in the sea, and eelgrass that has washed up on the beach can be used to germinate and grow without damaging the native eelgrass.

[0017] Figure 2 shows ten germination cases 60 placed in a container 70. As shown in Figure 2(b), pots 11 containing sprouted eelgrass are submerged inside the tank 10. After sprouting, the eelgrass grows leaves while planted in the pots 11. Multiple pots 11 are connected in a row or in multiple rows. By connecting multiple pots 11 in this way, the roots of the eelgrass will intertwine and become established more easily after transplanting into the sea. Pots 11 are made from biodegradable materials. For example, Jiffy pots made from peat moss are preferable.

[0018] Eelgrass seeds before germination We brought back eelgrass that had washed up on a sandy beach (Figure 3(a)) and allowed it to mature in open light and seawater for 60 days (Figure 3(b) and Figure 3(c)). Figure 3(a) is a photograph of the eelgrass that was brought back, and Figures 3(b) and 3(c) are photographs of the eelgrass during the maturation period. Figure 4 shows the maximum daytime temperatures during the 60-day maturation period. During the maturation period, buckets were used in the school library, and the water temperature in the buckets was about 2°C lower than the outside air temperature. During the maturation period, the buckets were aerated. Seeds were collected using tweezers from flower branches that had been matured for at least 60 days in the state shown in Figure 3(b). For seeds that are not to be germinated, store them at a refrigerated temperature, for example in a refrigerator, away from light. When you want to germinate them, you can take them out of the refrigerator and germinate them in a Germination Case 60 at any time. These seeds can be used at any time, up until new flowering branches are harvested in June of the following year (or more precisely, until a further 60 days have passed since the flowering branches were harvested), and can be germinated and grown all year round.

[0019] Conditions for eelgrass germination Figure 5 is a photograph to explain the germination experiment, and Figure 6 is a table showing the results of the germination experiment. The optimum temperature for germination of eelgrass seeds varies considerably depending on the region of Japan, but a temperature between 11°C and 15°C is preferable, with 13°C thought to be optimal, but to examine whether germination is possible in the summer, the temperature of germination case 60 was kept at around 20°C. Before transferring the eelgrass seeds to germination case 60, they were soaked in seawater with an average temperature of 30°C, as shown in Figure 4, so the water temperature difference is about 10°C. To cool the germination case 60, we used condensation water from the aquarium 10, which had been cooled to about 13°C using the aquarium cooler 20. The germination case 60 was placed in the empty space of the container 70. Charcoal was placed inside the germination case 60. The black lumps shown in Figures 5(b) to (d) are the charcoal. To compare the effects on germination, we used fresh water, seawater, germination water made by mixing fresh water with a 1000-fold diluted health drink (FFC Pyrogen, Akatsuka Co., Ltd.), germination water made by mixing a very small amount of fertilizer (Hyponex Japan, a liquid fertilizer for hydroponic cultivation made by dissolving powder in water) into fresh water, and carbonated water (Wilkinson Asahi Beverages Co., Ltd.). For fresh water and sea water, the seeds were divided into three types: white, brown, and black. The black seeds are said to be mature seeds. For health drinks, fertilizer, and carbonated water, no distinction was made between white, brown, and black seeds. In Figure 6, they are labeled "MIX." All germination cases 60 were filled with charcoal and exposed to light for 12 hours per day using an LED irradiation device 50.

[0020] Figure 6 shows the experimental results. First, when comparing seawater and fresh water, the germination rate of fresh water is higher than that of seawater. This shows that using fresh water as germination water increases the germination rate. Germination was confirmed in 18 hours for the germination water made by mixing the health drink with fresh water, and the germination rate was 88% after six days. Germination was also confirmed in two days for the germination water made by mixing fertilizer with fresh water, and the germination rate was 50% after six days. When carbonated water was used as the germination water, germination was confirmed on the third day, and the germination rate was 88% after six days. The carbonated water was replaced on the fourth, fifth, sixth, and seventh days. Since germination increased after replacement, it is believed that the carbon dioxide had a large effect. The growth requirements for eelgrass include N (nitrogen), P (phosphate), Si (silicon), and CO2 (carbon dioxide). Although CO2 (carbon dioxide) exists in nature, it is believed that a high concentration of CO2 (carbon dioxide) in the environment affected germination. Germination was also confirmed with fertilizer and carbonated water. Also, seeds germinate faster in fresh water than in salt water.

[0021] Figure 7 shows the results of investigating the effect of light on germination. The temperature of the germination case 60 was kept at around 20°C, charcoal was placed in the germination case 60, and the germination case 60 was covered with aluminum foil to prevent it from being exposed to radiation from the LED irradiation device 50. Based on the results of the germination experiment shown in Figure 6, we used germination water mixed with a health drink, which had a high germination rate. Germination was confirmed in 17 hours, and the germination rate was 67% after 3 days. This suggests that light is not necessary for germination.

[0022] Figure 8 shows the results of an experiment in which the components of the germination water were changed. The temperature of the germination case 60 was kept at around 20°C, charcoal was placed in the germination case 60, and light was irradiated for 12 hours a day by the LED irradiation device 50. The liquids labeled "Rose: N, P, Si, CO2" were rose fertilizer, commercially available silica water, and carbonated water. The rose fertilizer used had a mixture ratio of N (nitrogen) 10:P (phosphate) 13:K (potassium) 6:Mg (magnesium) 1. I used rose fertilizer because it has a high mixture of N (nitrogen) and P (phosphate). The liquid was a mixture of 70% carbonated water (Wilkinson Asahi Beverages Co., Ltd.) and 30% silica water. For the liquid labeled "Brown rice vinegar + water," we added a drop of brown rice vinegar to fresh water. The "health drink" used in Figure 6 contained rice vinegar, so we wanted to confirm the effect of rice vinegar on germination. Liquids labeled "Salt Koji + Fresh Water" contain a very small amount of salt koji added to fresh water. For the liquid labeled "yogurt", we used only yogurt (Meiji Probio Yogurt LG21 Meiji Co., Ltd.) without diluting it with water. As shown in Figure 8, "Rose: N, P, Si, CO2" and "Black rice vinegar + water" had a germination effect and can be used as germination water. On the other hand, no germination occurred in the "Shio-koji + fresh water" or "yogurt" mixture. The "yogurt" mixture lost its viscosity and appeared to have gone rotten, so the experiment was discontinued.

[0023] Figure 9 shows the results of an experiment that examined the effect on germination of water (FFC Water, Akatsuka Co., Ltd.) that had been modified with the water quality improving ceramics contained in the "health drink" used in Figure 6. The liquid used in Figure 9 was tap water that had been treated to improve its quality by adding water quality improvement ceramics (Pyrobath, Akatsuka Co., Ltd.). As shown in Figure 9, germination was not affected by water improved with water quality improvement ceramics.

[0024] Figure 10 shows the results of an experiment that examined the effect of apple cider vinegar, contained in the "health drink" used in Figure 6, on germination. For the apple cider vinegar, I used 100% organic apple cider vinegar, adding one drop to fresh water. As shown in Figure 10, water containing organic apple cider vinegar had no effect on germination.

[0025] Based on the results for "black rice vinegar + water" shown in Figure 8, the results for "water improved with water quality improvement ceramics" shown in Figure 9, and the results for "apple cider vinegar" shown in Figure 10, it is believed that the rice vinegar contained in the "health drink" affected germination.

[0026] Figure 11 shows the results of further experiments examining the effects of different liquids on germination. The liquid labeled "Ha: N, P, Si, CO2" was a mixture of fertilizer (Hyponex Japan Co., Ltd., a liquid fertilizer for hydroponic cultivation made by dissolving powder in water), carbonated water (Wilkinson Asahi Beverages Co., Ltd.), and silica water. Fertilizer (Hyponex Japan Co., Ltd., a liquid fertilizer for hydroponic cultivation made by dissolving the powder in water) contains N (nitrogen) and P (phosphate) in a ratio of N (nitrogen) 6.5:P (phosphate) 6. The liquid was a mixture of 70% carbonated water (Wilkinson Asahi Beverages Co., Ltd.) and 30% silica water, with a very small amount of fertilizer added. As shown in Figure 11, "Ha: N, P, Si, CO2" had a germination effect, so it can be used as germination water.

[0027] About the sand in the pot for planting eelgrass For eelgrass to grow, it needs to absorb N (nitrogen), P (phosphate), and Si (silicon) through its roots (hydroponic cultivation method). When I checked with Sagamihara City's Water Bureau, I was told that tap water contains silicon, so I decided that the silicon in tap water was fine. Nitrogen and phosphorus are contained in the sand where the eelgrass is harvested, but I added rose fertilizer, which contains a lot of nitrogen and phosphorus, and also soil improvement activated soil (FFC Ace Akatsuka Co., Ltd.). I dechlorinated the tap water and used artificial seawater base to create seawater with a salinity of 2.8%. I thought that a salinity lower than the 3.4% salinity of seawater would be more suitable for eelgrass growth. In order not to disrupt the marine ecosystem, it is preferable to use sand from the area where you want to transplant (the sand from where the flower branches and seeds were collected), but you can also use sand and mud such as live sand. The LED irradiation device 50 used an LED light with the optimum light intensity for photosynthesis for hydroponic cultivation. The LED irradiation device 50 was cycled between light and dark for 12 hours.

[0028] Cultivating eelgrass after germination The optimum temperature for leaf growth is generally said to be 12 to 21°C, although this varies depending on the region. However, we believe that 13°C is the appropriate seawater temperature for Aquarium 10. Although there are regional differences, the amount of light required for eelgrass is approximately 50-200 μmol / (m 2 s), so sufficient light can be obtained even with low-power LEDs. Aquarium tank 10 was used, measuring 31.5 cm in depth, 16 cm in width, and 19.5 cm in height. This size of aquarium tank for home use is sufficient for cultivating eelgrass.

[0029] As explained above, the eelgrass cultivation method of the present invention is a method for cultivating eelgrass that uses an aquarium for storing seawater, an aquarium cooler for cooling the seawater, an aeration system for supplying oxygen to the seawater, a purification device for purifying the seawater, an LED irradiation device for shining light into the aquarium, a container for placing the aquarium inside, and a germination case for placing the aquarium together with the aquarium inside the container, where germination water is stored in the germination case, condensation water that occurs on the outside of the aquarium due to cooling by the aquarium cooler is stored inside the container and the germination case is cooled by the condensation water that has accumulated inside the container, a pot containing germinated eelgrass is submerged inside the aquarium to allow the eelgrass leaves to grow, and unsprouted eelgrass seeds are placed in the germination case and the seeds are allowed to germinate. In this way, condensation water that forms on the outside of the aquarium is stored inside the container and the germination case is cooled by the condensation water that has accumulated inside the container, allowing eelgrass leaves to grow in the aquarium and eelgrass seeds to germinate in the germination case.This allows eelgrass to germinate and grow at any time of the year, and large amounts of grown eelgrass can be returned to the sea. It is preferable for the eelgrass seeds before they germinate to be aged in seawater with a temperature of 25°C or higher. In this way, it is possible to mature eelgrass seeds before they germinate, so there is no need to collect flower branches living in the sea; eelgrass that has washed up on beaches can be used to germinate and grow without damaging the wild-growing eelgrass. In some areas, there are events where 200-300 people per day collect flower branches in the sea over multiple days, and wild-growing flower branches are collected by a large number of people. This research was able to demonstrate that it is possible to germinate flower branches that have washed up on beaches, without having to pull out wild-growing flower branches in the sea. In addition, by using fresh water with added fertilizer containing nitrogen and phosphorus or rice vinegar as the germination water, the number of days until germination can be reduced compared to using seawater. In addition, by using carbonated water as germination water, the number of days until germination can be reduced compared to using seawater. In addition, by using condensation water to keep the temperature of the germination case between 16°C and 22°C, it is possible to use the condensation water to achieve a temperature that promotes germination. In the germination experiment, we aimed for 20°C, but we were able to confirm germination even when the temperature rose to 22°C. In addition, the eelgrass cultivation device of the present invention uses an aquarium that stores seawater in which eelgrass leaves grow after germination, an aquarium cooler that cools the seawater, an aeration system that supplies oxygen to the seawater, a purification device that purifies the seawater, an LED irradiation device that shines light into the aquarium, a germination case that stores germination water and germinates eelgrass seeds before germination, and a container in which the aquarium and germination case are placed inside; condensation water that forms on the outside of the aquarium due to cooling by the aquarium cooler is stored inside the container, and the germination case is cooled by the condensation water stored inside the container. In this way, condensation water that forms on the outside of the aquarium is stored inside the container and the germination case is cooled by the condensation water that has accumulated inside the container, allowing eelgrass leaves to grow in the aquarium and eelgrass seeds to germinate in the germination case, making it possible for eelgrass to germinate and grow in the home itself. If you want to germinate seeds outside of summer (for example, winter), use an aquarium heater to keep the temperature inside the germination case 60 between 16°C and 22°C. If the air temperature is lower than 13°C, for example 6°C, do not use condensed water, but place the germination case 60 outside the container 70, and use an aquarium heater to raise the water temperature and wait for the seeds to germinate. Also, if you want to grow eelgrass leaves outside of summer (for example, winter), raise the water temperature in the aquarium 10 with an aquarium heater. [Industrial Applicability]

[0030] According to the present invention, eelgrass that grows in each region can be caused to germinate regardless of the season and then cultivated after germination, thereby improving the habitat of organisms in each region without destroying the natural ecosystem of each region. [Explanation of symbols]

[0031] 10. Aquarium 11 Pot 20. Aquarium Cooler 30 Aeration 40 Purification Equipment 50 LED irradiation device 51 Timer 60 Germination Case 70 containers 80 Shade material

Claims

1. A tank for storing seawater, A tank cooler to cool the seawater, Aeration to oxygenate the seawater, A purification device that purifies the seawater; An LED irradiation device that irradiates light into the aquarium; A container in which the water tank is placed; A germination case to be placed inside the container together with the water tank; This is a method of cultivating eelgrass using The germination case stores germination water, The condensation water generated on the outer surface of the aquarium due to cooling by the aquarium cooler is stored inside the container, Cooling the germination case with the condensation water accumulated inside the container; A pot containing sprouted eelgrass is then submerged in the tank, and the eelgrass leaves are allowed to grow. Ungerminated eelgrass seeds are placed in the germination case and allowed to germinate. A method for cultivating eelgrass, comprising:

2. The eelgrass seeds before germination were aged in seawater with a temperature of 25°C or higher. A method for cultivating eelgrass according to claim 1.

3. The germination water used was fresh water to which fertilizer containing nitrogen and phosphorus or rice vinegar had been added. A method for cultivating eelgrass according to claim 1.

4. Carbonated water was used as the germination water. A method for cultivating eelgrass according to claim 1.

5. The condensation keeps the germination case at a temperature between 16°C and 22°C. A method for cultivating eelgrass according to claim 1.

6. A tank that stores seawater to grow the eelgrass leaves after they germinate. A tank cooler to cool the seawater, Aeration to oxygenate the seawater, A purification device that purifies the seawater; An LED irradiation device that irradiates light into the aquarium; A germination case that stores germination water and germinates eelgrass seeds before they germinate. A container for placing the water tank and the germination case therein; Using The condensation water generated on the outer surface of the aquarium due to cooling by the aquarium cooler is stored inside the container, The condensation water that accumulates inside the container cools the germination case. A device for cultivating eelgrass.

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