Seed propagation-type strawberry seedling, seedling raising method, and seedling raising facility

Abstract

To provide a seed propagation type strawberry seedling, a seedling raising method and seedling raising equipment capable of producing planned strawberries.SOLUTION: The seed propagation type strawberry seedling 1 includes a culture medium 2 and a strawberry seedling 10 cultivated using the culture medium 2. The amount of starch per 1mg of the fresh weight of the above-ground part in the strawberry seedling 10 is ≥ 10 μ g.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to seed-propagated strawberry seedlings, seedling raising methods, and seedling raising facilities. [Background technology]

[0002] Methods for producing strawberries have been known for some time (see, for example, Patent Document 1). Patent Document 1 discloses a method for growing offspring that develop on runners extending from a parent plant without separating them from the parent plant. Thus, the mainstream method for raising seedlings in strawberry production is a vegetative propagation method in which runners are divided into plants.

[0003] In contrast to this, a seed propagation type seedling raising method in which strawberries are grown from seeds is also known. Seed propagation type seedling raising methods have a high propagation rate and are also labor-saving. Furthermore, seed propagation type seedling raising methods can reduce the seedling raising area by about half compared to vegetative propagation type seedling raising methods. Furthermore, while vegetative propagation type seedling raising methods require a heavy burden of so-called runner receiving work, which is carried out in the summer, seed propagation type seedling raising methods allow strawberries to be produced without the so-called runner receiving work. In this way, seed propagation type seedling raising methods can significantly reduce the burden of work. For this reason, seed propagation type seedling raising methods are expected to become more widespread in the future. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 6981707 Summary of the Invention [Problem to be solved by the invention]

[0005] However, at present, there are few producers who have the know-how for seed propagation seedling raising methods, and therefore it cannot be said that seed propagation seedling raising techniques have been widely adopted.

[0006] Furthermore, with seed propagation seedling raising methods, the seedling raising period is long and varies greatly depending on the season. For example, with seed propagation seedling raising methods, the seedling raising period in summer is approximately 35 days, and in winter it is approximately 50 days. Furthermore, conventional seed propagation seedling raising methods are easily affected by climate. Furthermore, there is also the problem that strawberry seedlings tend to be uneven due to the effects of uneven temperature and sunlight in the seedling raising house. Therefore, conventional seed propagation seedling raising methods have the problem of making planned production very difficult.

[0007] The present disclosure has been made in consideration of the above points, and provides a seed-propagated strawberry seedling, a seedling raising method, and seedling raising equipment that enable planned strawberry production. [Means for solving the problem]

[0008] The embodiments of the present disclosure relate to the following [1] to [8].

[0009] [1] A culture medium; and strawberry seedlings cultivated using the medium, A seed-propagated strawberry seedling, wherein the amount of starch per 1 mg of above-ground fresh weight in the strawberry seedling is 10 μg or more.

[0010] [2] A culture medium; and strawberry seedlings cultivated using the medium, A seed-propagated strawberry seedling, wherein the amount of sucrose per 1 mg of above-ground fresh weight in the strawberry seedling is 0.8 μg or more.

[0011] [3] A culture medium; and strawberry seedlings cultivated using the medium, A seed-propagated strawberry seedling, wherein the amount of starch per 1 mg of fresh weight of the above-ground part in the strawberry seedling is 20 times or more the amount of glucose per 1 mg of fresh weight of the above-ground part.

[0012] [4] The seed-propagated strawberry seedling according to any one of [1] to [3], wherein the culture medium is a solidified soil containing polyester fiber.

[0013] [5] providing a medium in which strawberry seeds are sown; A step of storing the culture medium in a seedling raising space; Supplying a culture medium with a culture solution; and irradiating the medium to which the culture solution has been supplied with light, The carbon dioxide concentration in the seedling raising space is 800 ppm or more, At the surface where the culture medium is placed, the photosynthetic photon flux density is 150 μmol m -2 ·s -1 That's it for the seedling raising method.

[0014] [6] The seedling raising method according to [5], wherein the temperature in the seedling raising space is 5°C or higher and 30°C or lower.

[0015] [7] a building having an enclosed nursery space; A seedling raising shelf provided in the seedling raising space and on which a medium for strawberry seedlings is placed; A carbon dioxide adjusting device capable of adjusting the carbon dioxide concentration in the seedling raising space is provided, The seedling shelf is a storage tank for storing a culture solution to be supplied to the medium; a light source attached to the reservoir; The carbon dioxide concentration in the seedling raising space is 800 ppm or more, At the surface where the culture medium is placed, the photosynthetic photon flux density is 150 μmol m -2 ·s -1 That's all for the seedling raising facilities.

[0016] [8] Further provided is an air conditioning device capable of adjusting the temperature in the seedling raising space, The seedling raising facility according to [7], wherein the temperature in the seedling raising space is 5°C or higher and 30°C or lower. [Effects of the Invention]

[0017] According to this embodiment, strawberries can be produced in a planned manner. [Brief explanation of the drawings]

[0018] [Figure 1] FIG. 1 is a schematic perspective view showing a seed-propagated strawberry seedling according to one embodiment. [Figure 2] FIG. 2 is a schematic perspective view showing a seedling raising facility according to one embodiment. [Figure 3] FIG. 3 is a schematic perspective view showing a seedling raising shelf of a seedling raising facility according to one embodiment. [Figure 4] FIG. 4 is a front view showing a seedling raising shelf of a seedling raising facility according to one embodiment. [Figure 5] FIG. 5 is a flowchart showing a seedling raising method according to one embodiment. [Figure 6] 6(a)-(d) are diagrams illustrating a seedling raising method according to one embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0019] An embodiment will be described in detail below with reference to the drawings. The figures shown below are schematic diagrams. Therefore, the size and shape of each part are appropriately exaggerated for ease of understanding. Furthermore, appropriate modifications can be made within the scope of the technical concept. In the figures shown below, identical parts are denoted by the same reference numerals, and some detailed descriptions may be omitted. Furthermore, the numerical values, such as dimensions, and material names of each component described in this specification are examples of an embodiment, and are not limited thereto and may be selected and used as appropriate. In this specification, terms specifying shapes or geometric conditions, such as parallel, orthogonal, and perpendicular, are interpreted not only to mean the strict meaning but also to include substantially the same state.

[0020] (Seed-propagated strawberry seedlings) First, a seed-propagated strawberry seedling 1 according to this embodiment will be described with reference to Fig. 1. Fig. 1 is a schematic perspective view showing a seed-propagated strawberry seedling 1 according to one embodiment.

[0021] The seed-propagated strawberry seedling 1 includes a culture medium 2 and a strawberry seedling 10 cultivated using the culture medium 2.

[0022] The medium 2 is contained in a cell tray Ct. The medium 2 may be, for example, a solidified culture medium containing polyester fiber and peat moss, a solidified culture medium containing coconut fiber and peat moss, or a culture medium containing a mixture of at least two of rock wool, Akadama soil, peat moss, and leaf mold. When the medium 2 is a solidified culture medium containing polyester fiber and peat moss, it can be prevented from collapsing when the strawberry seedlings 10 are potted and planted in the pots 4 (see FIG. 6(c)). Therefore, when the medium 2 is a solidified culture medium containing polyester fiber and peat moss, it is possible to improve work efficiency and reduce the risk of damaging the roots of the strawberry seedlings 10. Furthermore, because the medium 2 can be prevented from collapsing, it can also be prevented from becoming messy. This allows the seed-propagated strawberry seedlings 1 to be easily handled.

[0023] In this embodiment, the amount of starch per mg of above-ground fresh weight in the strawberry seedlings 10 is 10 μg or more. This makes it possible to suppress energy consumption in the strawberry seedlings 10, and the strawberry seedlings 10 can grow stably after planting. Furthermore, because energy consumption in the strawberry seedlings 10 is suppressed, surplus energy is used for growth after planting the strawberry seedlings 10. This makes it possible to improve the growth rate of the strawberry seedlings 10. In this embodiment, as will be described later, the seedling raising facility 20 can promote the growth of the strawberry seedlings 10, and strawberry seedlings 10 having a starch amount of 10 μg or more per mg of above-ground fresh weight can be grown.

[0024] The amount of sucrose per mg of aboveground fresh weight in the strawberry seedlings 10 is 0.8 μg or more. Even in this case, energy consumption of the strawberry seedlings 10 can be suppressed, allowing the strawberry seedlings 10 to grow stably after planting. Furthermore, because energy consumption of the strawberry seedlings 10 is suppressed, surplus energy is utilized for growth after planting. This allows the growth rate of the strawberry seedlings 10 to be improved. In this embodiment, as described below, the seedling raising facility 20 can promote the growth of the strawberry seedlings 10, allowing strawberry seedlings 10 to be raised with an amount of sucrose of 0.8 μg or more per mg of aboveground fresh weight. Strawberry seedlings are generally raised in a nursery house in the summer. In this case, the seedlings are raised under high-temperature conditions, resulting in significant energy consumption due to respiration. Strawberry seedlings 10 with high amounts of photosynthetic products such as starch and sugar demonstrate their value when cultivated under the above-mentioned environment.

[0025] The amount of starch per mg of aboveground fresh weight in the strawberry seedlings 10 is more than 20 times the amount of glucose per mg of aboveground fresh weight. This is expected to result in stable growth and an improved growth rate after so-called direct planting or potting.

[0026] Next, the seedling raising facility 20 for raising the strawberry seedlings 10 will be described.

[0027] (seedling raising equipment) As shown in Figure 2, the seedling raising facility 20 includes a building 30 having a closed seedling raising space S, a seedling raising shelf 40 provided within the seedling raising space S and on which culture medium 2 for strawberry seedlings 10 is placed, and a carbon dioxide adjusting device 50 capable of adjusting the carbon dioxide concentration within the seedling raising space S. The seedling raising facility 20 may further include an air conditioning device 60 capable of adjusting the temperature within the seedling raising space S.

[0028] <Building> The building 30 has a door 31, and is configured so that an enclosed seedling raising space S can be formed by closing the door 31. The building 30 may be a container, a building, a warehouse, or the like. A curtain 32 may be provided near the door 31 inside the building 30. This prevents the carbon dioxide concentration and temperature in the seedling raising space S from changing when the door 31 is opened. Furthermore, by providing the curtain 32 near the door 31, it is possible to prevent insects and the like from entering the seedling raising space S when the door 31 is opened. Note that a trapping tape 33 may be provided inside the building 30 to capture insects that have entered the seedling raising space S.

[0029] Here, the carbon dioxide concentration in the seedling raising space S is 800 ppm or more. This promotes photosynthesis of the strawberry seedlings 10 and promotes the growth of the strawberry seedlings 10. The carbon dioxide concentration in the seedling raising space S is adjusted by the carbon dioxide adjusting device 50 as described above.

[0030] Furthermore, the temperature in the seedling raising space S may be 5°C or higher and 30°C or lower. Having a temperature in the seedling raising space S of 5°C or higher can promote the growth of the strawberry seedlings 10. Having a temperature in the seedling raising space S of 30°C or lower can prevent the strawberry seedlings 10 from becoming weakened by the heat.

[0031] <Seedling shelf> 3 and 4, the seedling raising shelf 40 has a storage tank 41 and a light source 42 attached to the storage tank 41. First, the storage tank 41 will be described.

[0032] <<Storage tank>> As shown in FIG. 3, the storage tanks 41 are attached to a plurality of (four) support columns 43. The storage tanks 41 are arranged at intervals in the vertical direction along the support columns 43. A culture medium area for cultivating strawberry seedlings 10 is provided within each storage tank 41. The underside of each storage tank 41 except for the lowest storage tank 41 forms a ceiling surface for the storage tank 41 located below it, and light sources 42 are arranged in parallel. A top plate 41a is provided above the top storage tank 41, and a light source 42 for the top storage tank 41 is arranged on the underside of this top plate 41a.

[0033] This reservoir 41 stores the liquid to be supplied to the culture medium 2. In this case, the liquid is liquid fertilizer (culture solution) in which fertilizer is dissolved in water.

[0034] The liquid is configured to be supplied from a liquid supply unit 45. The liquid supply unit 45 includes a tank 46 and a pump 47 that pumps up the liquid in the tank 46. In the illustrated example, the liquid supply unit 45 is disposed below the lowest storage tank 41. The liquid supply unit 45 is configured to supply the liquid to the uppermost storage tank 41. The storage tanks 41 are connected to each other by a circulation pipe 48. Therefore, the liquid supplied to the uppermost storage tank 41 is supplied to each storage tank 41 via the circulation pipe 48. The liquid is then collected from the lowermost storage tank 41 into the tank 46. In this manner, the liquid is configured to circulate through the storage tanks 41.

[0035] The planar shape of the storage tank 41 is rectangular. However, the planar shape of the storage tank 41 may be square, a polygon other than a rectangle, or a circle.

[0036] The longitudinal length of the storage tank 41 may be 800 mm or more and 2000 mm or less. The widthwise length of the storage tank 41 may be 500 mm or more and 800 mm or less. When the storage tank 41 is of the above size, it becomes easy to install multiple cell trays Ct and also makes it easier to manage the environment for growing the strawberry seedlings 10.

[0037] Furthermore, the material constituting the reservoir 41 may be a lightweight material that is water-resistant. For example, the material constituting the reservoir 41 may be expanded polystyrene (EPS) or polypropylene (PP). Furthermore, an antibacterial agent, an anti-algae agent, or the like may be kneaded into the material constituting the reservoir 41.

[0038] <<Light source>> The light source 42 may be an LED lighting device. In this embodiment, the light source 42 is a sheet-like lighting device, a so-called one-sided light-emitting planar light source sheet. As shown in FIG. 4, a plurality of LED chips 44 are arranged on the light-emitting surface (the lower surface in FIG. 4) of the light source 42. By using such a direct-type light source sheet, the light emitted from the LED chips 44 passes directly through the light-emitting surface. As a result, the light emitted reaches the strawberry seedlings directly below, increasing the amount of light and promoting the growth of the strawberry seedlings. Furthermore, since the light source 42 is a planar light source sheet, the overall thickness can be reduced, thereby suppressing the occurrence of shadows on the sides of the LED chips 44.

[0039] Furthermore, since the light source 42 is a planar light source sheet, the light source 42 is flexible and lightweight. This allows the light source 42 to be easily attached to the storage tank 41. Furthermore, since the light source 42 is flexible, the light source 42 can be applied to seedling raising shelves 40 of various sizes and shapes. In this specification, "flexible" means that "the radius of curvature when folded is at least 1 m or less, preferably 50 cm, more preferably 30 cm, even more preferably 10 cm, and particularly preferably 5 cm."

[0040] Furthermore, since the light sources 42 are planar light source sheets, the thickness of the light sources 42 can be reduced. This allows the spacing between the storage tanks 41 in the vertical direction to be narrowed, and the number of storage tanks 41 included in each seedling raising shelf 40 to be increased. This allows the production of strawberry seedlings 10 per unit area to be increased.

[0041] The overall shape of the light source 42 is rectangular in a plan view, but there are no particular limitations on the size and planar shape of the light source 42. When the light source 42 is a planar light source sheet, there is a high degree of freedom in size and shape, so it can flexibly meet various demands in this regard. In addition, because the light source 42 is flexible, it can be attached to installation surfaces of various shapes, not just flat installation surfaces.

[0042] In the illustrated example, the light source 42 is configured by a single planar light source sheet. Note that a plurality of planar light source sheets may be provided as the light source 42. In this case, the longitudinal length of one light source 42 (one light source sheet) may be, for example, 500 mm or more, or 550 mm or more. The longitudinal length of one light source 42 may be 750 mm or less, or 650 mm or less. The widthwise length of one light source 42 may be 300 mm or more, or 350 mm or more. The widthwise length of one light source 42 may be 500 mm or less, or 450 mm or less.

[0043] In this embodiment, the light source 42 is arranged horizontally, which makes it possible to suppress variations in the light irradiated onto the strawberry seedlings 10 located below the light source 42.

[0044] On the installation surface 41b of the culture medium 2 (see FIG. 4), the photosynthetic photon flux density PPFD (photosynthetic photon flux density) at a point 15 cm away from the light source 42 is 150 μmol m -2 ·s -1 By setting the PPFD in the above range, the PPFD required for raising the strawberry seedlings 10 can be sufficiently provided, and the growth of the strawberry seedlings 10 can be promoted. There is no particular upper limit for PPFD, but for example, 2000 μmol m -2 ·s -1or less. PPFD can also be measured using a measuring device such as a photon meter (for example, the photon sensor LI-190R and light meter LI-250A manufactured by LI-COR, USA). At this time, the photon sensor LI-190R is placed horizontally relative to the installation surface 41b of the culture medium 2 (or the light source). The photon sensors are placed discretely in a matrix according to the area of ​​the culture medium, and the numerical value indicating the light intensity is read when it stabilizes. The numerical value is read using a light meter calibrated to the sensor's characteristic value. In this embodiment, the PPFD numerical value is expressed as the average value of the numerical values ​​measured in the matrix.

[0045] 3 and 4 show an example in which the light source 42 is a direct-type LED sheet, but the present invention is not limited to this. The light source 42 may be an edge-lit LED sheet that has a light guide plate or the like interposed therebetween. An edge-lit LED sheet is more likely to suppress variations in the amount of light from the light-emitting surface. The light source 42 may also be a bar light. In this case, the light source 42 may be a straight-tube LED bar light in which multiple LEDs are arranged, or may be a fluorescent lamp.

[0046] <Carbon dioxide regulator> The carbon dioxide regulating device 50 is a device that regulates the carbon dioxide concentration in the seedling raising space S. As shown in Figure 2, the carbon dioxide regulating device 50 has a cylinder 51 filled with carbon dioxide and a supply unit 52 that is connected to the cylinder 51 and supplies the carbon dioxide in the cylinder 51 into the seedling raising space S. The supply unit 52 includes a valve 53, and is configured so that carbon dioxide is supplied from the supply unit 52 into the seedling raising space S by opening the valve 53.

[0047] <Air conditioner> The air conditioning device 60 is a device that adjusts the temperature in the seedling raising space S. This air conditioning device 60 may be attached to the inner wall of the building 30. Furthermore, as the air conditioning device 60, for example, a circulator 61 may be placed in the seedling raising space S. The air conditioning device 60 may also adjust the humidity in the seedling raising space S. In this case, as the air conditioning device 60, for example, a humidifier 62 may be placed in the seedling raising space S.

[0048] The seedling raising shelves 40, carbon dioxide regulators 50, and air conditioners 60 are each electrically connected to a control unit 70. In this case, it is preferable that the control unit 70 is placed at a location sufficiently far away from the strawberry seedlings 10. This makes it possible to prevent variations in growth caused by heat from the control unit 70 between strawberry seedlings 10 located close to the control unit 70 and those located far away. As shown in Figures 2 and 3, the control unit 70 may be placed, for example, below the lowest storage tank 41.

[0049] (Seedling raising method) Next, a seedling raising method according to this embodiment will be described.

[0050] First, a medium 2 on which strawberry seeds 3 are sown is prepared (preparation step, symbol S1 in FIG. 5). At this time, as shown in FIG. 6(a), the medium 2 is first prepared and housed in a cell tray Ct. Then, the strawberry seeds 3 are sown on the medium 2. At this time, the strawberry seeds 3 may be treated with sulfuric acid. This can thin the epidermis of the strawberry seeds 3, thereby hastening germination.

[0051] Next, the culture medium 2 is stored in the seedling raising space S (storing step, symbol S2 in FIG. 5). At this time, the culture medium 2 (cell tray Ct) is placed in the storage tank 41 of the seedling raising shelf 40. In addition, the carbon dioxide concentration in the seedling raising space S is adjusted by the carbon dioxide adjusting device 50 so that the carbon dioxide concentration in the seedling raising space S becomes 800 ppm or more.

[0052] Next, the culture medium 2 is supplied with the culture medium solution (culture medium supply step, symbol S3 in FIG. 5). At this time, the culture medium is supplied from the liquid supply unit 45 to the storage tank 41. As a result, the cell tray Ct placed in the storage tank 41 is immersed in the culture medium solution. In this manner, the culture medium is supplied to the storage tank 41. Note that the culture medium may be supplied to the storage tank 41 before the culture medium 2 (cell tray Ct) is placed in the storage tank 41.

[0053] Next, the medium 2 to which the culture solution has been supplied is irradiated with light (light irradiation step, reference symbol S4 in FIG. 5). At this time, the medium 2 placed in the storage tank 41 of the seedling raising shelf 40 is irradiated with light from the light source 42. The light source 42 also irradiates light at a photosynthetic photon flux density of 150 μmol m on the installation surface 41b of the medium 2. -2 ·s -1 Light is irradiated so as to achieve the above.

[0054] In this way, a seed-propagated strawberry seedling 1 is obtained that includes the grown strawberry seedling 10. The seedling raising period may be, for example, 14 days or more and 35 days or less. Therefore, the seed-propagated strawberry seedling 1 can be obtained in a short seedling raising period.

[0055] Then, as shown in FIG. 6(b), the seed-propagated strawberry seedlings 1 are taken out of the seedling raising space S after a predetermined raising period.

[0056] Next, as shown in FIG. 6(c), the strawberry seedlings 10 of the seed-propagated strawberry seedlings 1 are potted in pots 4 and planted.

[0057] Thereafter, as shown in FIG. 6(d), strawberries are grown and harvested using the strawberry seedlings 10.

[0058] As described above, according to this embodiment, the seedling raising facility 20 comprises a building 30 having a closed seedling raising space S, a seedling raising shelf 40 provided in the seedling raising space S and having the culture medium 2 for the strawberry seedlings 10 placed therein, and a carbon dioxide regulator 50 capable of adjusting the carbon dioxide concentration in the seedling raising space S. The seedling raising shelf 40 also has a storage tank 41 for storing the culture solution to be supplied to the culture medium 2, and a light source 42 attached to the storage tank 41. The carbon dioxide concentration in the seedling raising space S is 800 ppm or more. This can promote photosynthesis of the strawberry seedlings 10, thereby facilitating the growth of the strawberry seedlings 10. Furthermore, the photosynthetic photon flux density (PPFD) on the installation surface 41b of the culture medium 2 is 150 μmol m -2 ·s -1 This is the end of the process. This makes it possible to provide a sufficient amount of PPFD required for raising the strawberry seedlings 10 and promote the growth of the strawberry seedlings 10. This allows the strawberry seedlings 10 to be raised in a short period of time.

[0059] Furthermore, in the seedling raising facility 20 according to this embodiment, the carbon dioxide concentration in the seedling raising space S and the photosynthetic photon flux density of the irradiated light are controlled to fall within desired ranges. This makes it possible to suppress variations in the growth of the strawberry seedlings 10. Furthermore, in the seedling raising facility 20 according to this embodiment, the carbon dioxide concentration in the seedling raising space S and the photosynthetic photon flux density of the irradiated light are controlled to fall within desired ranges, making it possible to raise the strawberry seedlings 10 without being affected by the seasons. Thus, according to this embodiment, the strawberry seedlings 10 can be raised efficiently and systematically in a seed-propagated seedling raising method.

[0060] Furthermore, in the seedling raising facility 20 according to this embodiment, the strawberry seedlings 10 are raised in a closed seedling raising space S, which significantly reduces the risk of insects. This allows the strawberry seedlings 10 to be raised efficiently without the use of pesticides. Furthermore, in the seedling raising facility 20 according to this embodiment, the strawberry seedlings 10 are raised in a closed seedling raising space S, which allows the strawberry seedlings 10 to be raised efficiently without being affected by the weather.

[0061] Furthermore, strawberry seedlings generally cannot withstand planting in summer. In contrast, in this embodiment, the amount of starch per 1 mg of above-ground fresh weight of the strawberry seedling 10 is 10 μg or more. Furthermore, the amount of sucrose per mg of above-ground fresh weight of the strawberry seedling 10 is 0.8 μg or more. Therefore, after planting the strawberry seedling 10, the energy consumption of the strawberry seedling 10 can be suppressed, and the strawberry seedling 10 can grow stably after planting. Furthermore, because the energy consumption of the strawberry seedling 10 is suppressed, the surplus energy is used for growth after planting the strawberry seedling 10. Therefore, the growth rate of the strawberry seedling 10 can be improved.

[0062] [Example] Next, a specific example of this embodiment will be described.

[0063] Example 1 Strawberry seedlings were raised in the seedling raising facility shown in Figure 2. The seedling raising conditions were as follows. Variety: Yotsuboshi (registered trademark) Light source: LED sheet Liquid: Nutrient solution (OAT House Fertilizer A Formulation (OAT Agrio Co., Ltd.)) Seed treatment: sulfuric acid treatment Seedling raising period: 3 weeks Light amount (photosynthetic photon flux density): 220 μmol m -2 ·s -1 Culture medium dilution ratio: 0.6 Electrical conductivity of culture solution: 1.56 dS / m Carbon dioxide concentration in the seedling space: 1200 ppm Temperature in the seedling space: 25℃

[0064] Example 2 Light intensity: 280 μmol m -2 ·s -1 The strawberry seedlings were grown in the same manner as in Example 1, except that:

[0065] Example 3 Light intensity: 250 μmol m -2 ·s -1 The strawberry seedlings were grown in the same manner as in Example 1, except that the temperature was 100°C, the dilution ratio of the culture solution was 1, and the electrical conductivity of the culture solution was 2.60 dS / m.

[0066] Example 4 Strawberry seedlings were grown in the same manner as in Example 1, except that the dilution ratio of the light culture solution was 1.2 times and the electrical conductivity of the culture solution was 3.12 dS / m.

[0067] Example 5 Light intensity: 280 μmol m -2 ·s -1 The strawberry seedlings were grown in the same manner as in Example 1, except that the temperature was 1.2 times the temperature of the culture medium, the dilution ratio of the culture medium was 1.2 times the temperature of the culture medium, and the electrical conductivity of the culture medium was 3.12 dS / m.

[0068] Example 6 The seedling period was 4 weeks, and the light intensity was 150 μmol m -2 ·s -1 The strawberry seedlings were grown in the same manner as in Example 1, except that:

[0069] Example 7 The seedling period was 4 weeks, and the light intensity was 280 μmol m -2 ·s -1 The strawberry seedlings were grown in the same manner as in Example 1, except that:

[0070] Example 8 The seedling period was 4 weeks, and the light intensity was 150 μmol m -2 ·s -1 The strawberry seedlings were grown in the same manner as in Example 1, except that the temperature was 1.2 times the temperature of the culture medium, the dilution ratio of the culture medium was 1.2 times the temperature of the culture medium, and the electrical conductivity of the culture medium was 3.12 dS / m.

[0071] Example 9 The seedling period was 4 weeks, and the light intensity was 280 μmol m -2 ·s-1 The strawberry seedlings were grown in the same manner as in Example 1, except that the temperature was 1.2 times the temperature of the culture medium, the dilution ratio of the culture medium was 1.2 times the temperature of the culture medium, and the electrical conductivity of the culture medium was 3.12 dS / m.

[0072] Example 10 Strawberry seedlings were grown in the same manner as in Example 1, except that the seedling growth period was 4 weeks, the dilution ratio of the culture solution was 0.8 times, and the electrical conductivity of the culture solution was 2.08 dS / m.

[0073] Example 11 The seedling period was 4 weeks, and the light intensity was 250 μmol m -2 ·s -1 The strawberry seedlings were grown in the same manner as in Example 1, except that the temperature was 100°C, the dilution ratio of the culture solution was 1, and the electrical conductivity of the culture solution was 2.60 dS / m.

[0074] (Comparative Example 1) Strawberry seedlings were grown in the same manner as in Example 1, except that water was used as the liquid, i.e., the dilution ratio of the culture solution was 0 times, and the electrical conductivity of the culture solution was 0 dS / m.

[0075] (Comparative Example 2) Light intensity: 280 μmol m -2 ·s -1 Strawberry seedlings were grown in the same manner as in Example 1, except that the dilution ratio of the culture solution was 0, water was used as the liquid, i.e., the dilution ratio of the culture solution was 0, and the electrical conductivity of the culture solution was 0 dS / m.

[0076] (Comparative Example 3) The seedling period was 4 weeks, and the light intensity was 280 μmol m -2 ·s -1 Strawberry seedlings were grown in the same manner as in Example 1, except that the dilution ratio of the culture solution was 0, water was used as the liquid, i.e., the dilution ratio of the culture solution was 0, and the electrical conductivity of the culture solution was 0 dS / m.

[0077] (Reference example 1) Strawberry seedlings were raised in the seedling raising facility shown in Figure 2. The seedling raising conditions were as follows. Variety: Yotsuboshi (registered trademark) Light source: LED sheet Liquid: Culture solution Seed treatment: None Seedling period: 4 weeks Light amount (photosynthetic photon flux density): 150 μmol m -2 ·s -1 Culture medium dilution ratio: 0.8 Electrical conductivity of culture solution: 2.08 dS / m Carbon dioxide concentration in the seedling space: Approximately 400 ppm (unadjusted) Temperature in the seedling space: 25℃

[0078] (Reference example 2) Light intensity: 250 μmol m -2 ·s -1 The strawberry seedlings were grown in the same manner as in Reference Example 1, except that the dilution ratio of the culture solution was 1, and the electrical conductivity of the culture solution was 2.60 dS / m.

[0079] (Reference example 3) Strawberry seedlings were grown in a general greenhouse under the following conditions: Variety: Yotsuboshi (registered trademark) Light source: sunlight Liquid: Culture solution Seed treatment: None Seedling raising period: 3 weeks Light intensity (photosynthetic photon flux density): Uncontrolled (sunlight) Culture medium dilution ratio: 1.0 Electrical conductivity of culture solution: 2.60 dS / m Carbon dioxide concentration in the seedling space: Approximately 400 ppm (unadjusted) Temperature in the seedling space: Unregulated

[0080] (Reference example 4) Strawberry seedlings were grown in the same manner as in Reference Example 3, except that the seedling growing period was 4 weeks.

[0081] (Reference example 5) Strawberry seedlings were grown in the same manner as in Reference Example 3, except that the seedling growing period was 5 weeks.

[0082] (Reference example 6) Strawberry seedlings were grown in the same manner as in Reference Example 3, except that the seedling growing period was 6 weeks.

[0083] Next, the strawberry seedlings were examined for their strength, texture, fresh weight and plant height.

[0084] The results are shown in Tables 1 to 4. In Tables 3 and 4, the details of each evaluation item are as follows: "Durability": Fresh weight (mg) divided by plant height (cm) = fresh weight per 1 cm of plant height (mg / cm) A: Over 60 B: 45 or over but under 60 C: 30 or more and less than 45 D: Under 30 "tactile sensation" A: It is very sturdy and I don't think the stem will break easily. B: It is sturdy and the stem is unlikely to break. C: It is not sturdy and the stem may break depending on how you touch it. D: It feels weak and the stems break easily. E: It feels so weak that it is obvious that the stem will break just by touching it. Seedling raising period A: 3 weeks B: 4 weeks C: 5 weeks D: 6 weeks

[0085] [Table 1]

[0086] [Table 2]

[0087] [Table 3]

[0088] [Table 4]

[0089] As a result, as shown in Table 3, the strawberry seedlings according to Examples 1 to 11 were able to grow strong seedlings even in a shorter raising period compared to the strawberry seedlings according to Comparative Examples 1 to 3. In particular, the fresh weight per 1 cm of plant height (mg / cm) of the strawberry seedlings according to Examples 6, 7, and 9 to 11 was 60 (mg / cm) or more. This demonstrates that the seedling raising facility according to this embodiment can raise strong strawberry seedlings.

[0090] Furthermore, as shown in Table 3, the strawberry seedlings according to Examples 1 to 11 were able to have a good feel to the touch even in a short raising period compared to the strawberry seedlings according to Comparative Examples 1 to 3. In particular, the strawberry seedlings according to Examples 7 and 9 to 11 were able to grow very firm strawberry seedlings. Therefore, it was found that the seedling raising facility according to this embodiment can grow strawberry seedlings with a good feel to the touch.

[0091] It is also possible to combine the multiple components disclosed in the above-described embodiments and modifications as needed, or to delete some of the components disclosed in the above-described embodiments and modifications. [Explanation of symbols]

[0092] 1. Seed-propagated strawberry seedlings 2. Culture medium 10 strawberry seedlings 20 Seedling raising equipment 30 Buildings 40 Seedling shelf 41 Reservoir 41b Installation surface 42 Light source 50 Carbon dioxide regulator 60 Air conditioning unit S Seedling Space

Claims

1. A culture medium; and strawberry seedlings cultivated using the medium, A seed-propagated strawberry seedling, wherein the amount of starch per 1 mg of above-ground fresh weight in the strawberry seedling is 10 μg or more.

2. A culture medium; and strawberry seedlings cultivated using the medium, A seed-propagated strawberry seedling, wherein the amount of sucrose per mg of above-ground fresh weight in the strawberry seedling is 0.8 μg or more.

3. A culture medium; and strawberry seedlings cultivated using the medium, A seed-propagated strawberry seedling, wherein the amount of starch per mg of fresh weight of the above-ground part in the strawberry seedling is 20 times or more the amount of glucose per mg of fresh weight of the above-ground part.

4. The seed-propagated strawberry seedling according to claim 1, wherein the culture medium is a solidified soil containing polyester fiber.

5. providing a medium in which strawberry seeds are sown; A step of storing the culture medium in a seedling raising space; Supplying a culture medium with a culture solution; and irradiating the medium to which the culture solution has been supplied with light, The carbon dioxide concentration in the seedling raising space is 800 ppm or more, On the surface where the culture medium is placed, the photosynthetic photon flux density is 150 μmol m －２ ・s －１ That's it for the seedling raising method.

6. 6. The seedling raising method according to claim 5, wherein the temperature in the seedling raising space is 5°C or higher and 30°C or lower.

7. a building having an enclosed nursery space; A seedling raising shelf provided in the seedling raising space and on which a medium for strawberry seedlings is placed; A carbon dioxide adjusting device capable of adjusting the carbon dioxide concentration in the seedling raising space is provided, The seedling shelf is a storage tank for storing a culture solution to be supplied to the medium; a light source attached to the reservoir; The carbon dioxide concentration in the seedling raising space is 800 ppm or more, On the surface where the culture medium is placed, the photosynthetic photon flux density is 150 μmol m －２ ・s －１ That's all for the seedling raising facility.

8. Further provided is an air conditioning device capable of adjusting the temperature in the seedling raising space, The seedling raising facility according to claim 7, wherein the temperature in the seedling raising space is 5°C or higher and 30°C or lower.

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