JP2005000020A - Method for cultivating plant and device for raising seedling - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a plant cultivation technique requiring no work of planting on a field after raising seedling, lightening a cultivation tank, excellently growing roots in the cultivation tank, facilitating sprinkling management after raising seedling and applicable even to cultivation of root vegetables. <P>SOLUTION: The method for cultivating plants comprises laying a water absorbing material 3 on the inner bottom of a cultivation bag 2 obtained by forming a root permeable sheet into a bag-like shape, raising seedlings of a plant 6 in the cultivation tank 1 made by filling culture soil 4 in the inside of the cultivation bag 2, putting the cultivation tank 1 on the ground of a field at a stage when the plant 6 grows to be a desired size and extending the roots of the plant 6 into the inside of the ground. As a result of this, it is possible to be free from work of planting on the field and intend for labor saving in farm work. Furthermore, it is possible to decrease the quantity of the culture soil 4 and lighten the cultivation tank 1 because of large water retention capacity of the cultivation tank 1. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a plant cultivation technique for cultivating plants such as vegetables and flower buds, and more particularly to a plant cultivation technique capable of saving labor in cultivation work.
[0002]
[Prior art]
In plant cultivation of vegetables, flower buds and the like, a method of planting seedlings after germination and then planting them in the mainland is cultivated. Raising seedlings can (1) protect the seedlings with a nursery bed to shorten the number of days from planting to harvesting, and (2) increase the number of times of planting, such as extending the harvesting period of the previous crop only during the seedling raising period. (3) It is widely used in plant cultivation because it has the advantage that it can protect the soft seedling stage from weather disasters and pests by raising seedlings.
[0003]
However, in the cultivation method of planting seedlings in the main field after raising seedlings, labor is required for the seedling planting work. Therefore, in recent years, a bag-type cultivation method such as a bag culture method (see Non-Patent Document 1) has been developed as a cultivation technique that makes it possible to carry out everything from raising seedlings to harvesting without replanting plant seedlings. (For example, see Patent Documents 1 to 8).
[0004]
The bag-type cultivation method is a method of planting plant seedlings such as vegetables and flower buds in a bag-type cultivation tank formed by filling a bag-shaped bag with culture soil, and cultivating the plant by drip irrigation or the like. Here, as an example, the conventional bag-type cultivation method described in Patent Literatures 1 and 2 will be briefly described.
[0005]
FIG. 8 is a cross-sectional view of a main part of a conventional bag type cultivation tank.
The bag-type cultivation tank 100 has a configuration in which a culture soil 102 is filled in a plastic bag 101 made of a plastic sheet having flexibility. The plastic bag 101 is made of a material that does not allow air or water to pass through. The plant 103 cultivated in the cultivation tank 100 is planted on the cultivating soil 102 through the opening 101 a formed on the upper part of the plastic bag 101. The cultivation soil 102 is mixed with crimped spun fibers in order to supply sufficient air to the root 104 of the plant 103. Further, a drain hole 101b for draining water is formed on the lower side of the plastic bag 101.
[0006]
Watering the plant 103 is performed by a drip irrigation tube 105 inserted into the culture soil 102 through the opening 101a. The water supplied from the drip irrigation tube 105 penetrates the soil 102 and is supplied to the root 104.
[0007]
On the other hand, excessive irrigation is drained to the outside of the plastic bag 101 through the drain hole 101b. Thereby, it is prevented that the oxygen in the cultivation soil 102 in the cultivation tank 100 is exhausted and the plant 103 causes root rot.
[0008]
In the bag-type cultivation method as described above, the plant seedling can be moved between the nursery bed and the main field simply by moving the bag-type cultivation tank. Therefore, there is an advantage that the planting work is not necessary because the seedling is not replanted, and labor saving is achieved. In addition, the price of the bag itself is low, and it is easy to introduce even for small-scale farmers.
[0009]
[Patent Document 1]
Japanese Patent Laid-Open No. 2-215322 [Patent Document 2]
US Pat. No. 4,918,861 [Patent Document 3]
JP 2001- 211755 A [Patent Document 4]
US Pat. No. 5,193,306 [Patent Document 5]
US Pat. No. 5,379,547 [Patent Document 6]
JP-A-8-322378 [Patent Document 7]
JP 59-25622 A [Patent Document 8]
JP 2002-306000 A Non-Patent Document 1
Edited by the Japan Facility Horticultural Society, “Guidelines for the Latest Hydroponic Culture”, Seikodo Shinkosha Co., Ltd., June 15, 1996, 4 pages spread [0010]
[Problems to be solved by the invention]
In the conventional bag type cultivation method, plants are cultivated from raising seedlings to harvesting with a limited volume of soil called bags. Therefore, the water retention capacity and fertilization capacity of the soil are limited. Therefore, in order to cultivate plants with a small amount of soil, fine irrigation management such as drip irrigation of nutrient solution is required. Therefore, the management effort in irrigation management increases, and the management cost and equipment cost increase. On the other hand, when the cultivation tank is enlarged to increase the water retention capacity and fertilization capacity and the amount of cultivating soil is increased, the cultivation tank becomes heavier and cannot be transported easily.
[0011]
Further, since the rhizosphere volume of the plant to be cultivated is limited, when the plant grows large, looping (root winding) may occur in the root of the plant. When root winding occurs, the growth of the roots is deteriorated and the nutrient absorption efficiency of the roots is reduced, so that the growth of the plant is restricted.
[0012]
Moreover, the conventional bag-type cultivation method is mainly aimed at cultivating leaf stem vegetables and florets. However, root vegetables such as radish and carrots and other root vegetables such as potatoes and sweet potatoes are enlarged in the subterranean area, or the underground stems spread over a wide area. Such root vegetables cannot be cultivated by the bag-type cultivation method as described above.
[0013]
Moreover, since a water-impermeable bag is used for the cultivation tank, it is necessary to make a drainage hole in the side portion of the bag in order to prevent root rot of the plant to be cultivated. However, when a plant is cultivated for a long time in a humid environment, a state occurs where algae are generated and the drainage hole is blocked, and the drainage is not sufficiently performed. In such a case, the plant may cause root rot or poor growth.
[0014]
Therefore, the purpose of the present invention is that it is possible to consistently carry out from seedling to harvesting in the same cultivation tank without the need for planting in the main field after raising seedling, and it is possible to reduce the weight of the cultivation tank An object of the present invention is to provide a plant cultivation technique in which root growth in a cultivation tank is good, irrigation management after raising seedling is easy, and which can be applied to cultivation of root vegetables. Moreover, the objective of this invention is providing the seedling raising apparatus suitable for using for the said plant cultivation technique.
[0015]
[Means for Solving the Problems]
The plant cultivation method according to the present invention is a cultivation tank constructed by laying a water-absorbing material on the inner bottom surface of a cultivation bag in which a sheet having a permeability is formed in a bag shape and filling culture medium into the cultivation bag. Planting the plant in the stage, and when the plant has grown to a desired size, the cultivation tank is placed on the ground of the main field, and the plant is grown by extending the root of the plant into the ground. And
[0016]
Thus, the water retention capacity of the cultivation tank can be increased by laying the water absorbing material on the inner bottom surface of the cultivation bag. Therefore, the amount of soil filled in the cultivation tank can be reduced, and the cultivation tank can be reduced in weight. During the seedling raising period, the amount of nutrient water required for cultivation is small because the plant seedlings are small. Further, once irrigation is performed, the water-absorbing material retains the water in the cultivation bag, so that it is sufficient to supply water intermittently to the cultivation tank during the seedling raising period, and irrigation management is easy.
[0017]
Moreover, since the bag for cultivation is comprised by the sheet | seat which has a permeability, when the root of a plant seedling grows during the seedling raising period, a root tip will penetrate the packaging material and will protrude in the air. Since the root tip protruding into the air is in a dry environment, it stops growing. A large number of secondary roots are formed in a compensatory manner from the vicinity of the base of the root end where growth has stopped. Thereby, the root of a plant grows in the shape which has many branches in a parent root or a secondary root, and does not produce a root winding (looping). Therefore, the rooting of the plant is improved in the cultivation tank, and the growth of the plant is promoted. In addition, a large number of hair roots are generated from the tip of the parent root or the tip of the secondary root. Therefore, the plant absorbs nourishing water well, activates the plant, and promotes growth.
[0018]
When the plant has grown to a desired size, the cultivation tank is placed on the ground of the main field, and the roots of the plant are extended into the ground, so that the plant is planted in the main field. Accordingly, since the plant rhizosphere spreads within the soil of the main field, the water retention capacity and fertilization capacity in the plant rhizosphere are further increased. Therefore, irrigation management is facilitated and plant growth is also improved.
[0019]
As described above, simply placing the cultivation tank on the ground of the main field results in a state similar to that of planting the plant seedling in the main field, and therefore, the work of planting the plant seedling in the main field after the seedling is omitted. Therefore, labor saving of farm work is achieved.
[0020]
In addition, after the cultivation tank is placed on the ground of the main field, the plant can widely root on the ground of the main field. Therefore, it can be applied to the cultivation of root vegetables with the basement being enlarged or growing the basement stem over a wide area.
[0021]
Here, “permeability” means a property that allows fine roots of plants to pass through smoothly, and means that a large number of pores through which fine roots can pass are formed. Specifically, since the thickness of the fine root is generally about 0.5 to 1.0 mm in diameter, in order for the packaging material to have a root penetration, for example, a hole having a diameter of about 0.3 to 2.0 mm If it is a sheet or a net with a large number of holes, it will have transparency.
[0022]
Moreover, in this invention, a superabsorbent polymer can be mixed with the soil filled with the said bag for cultivation. As a result, the water retention capacity of the cultivation soil is dramatically increased, and the moisture environment in the cultivation tank is stabilized. Therefore, the water stress applied to the plant seedling is alleviated and the growth of the seedling is promoted. In addition, irrigation management is facilitated.
[0023]
Further, in the present invention, when raising the plant, a water-retaining sheet is laid on the surface of the bottom surface of the flat container with a gentle slope, and a water-permeable root shield sheet is provided on the surface of the water-retaining sheet. The cultivation tank is placed on the root-shielding sheet of the hydroponics bed that is laid and the nutrient solution is allowed to flow into the bottom of the container, thereby allowing the nutrient solution to penetrate into the water retention sheet and the cultivation. Irrigation can be performed by infiltrating the nutrient solution into the tank.
[0024]
Thus, the nutrient solution supplied to the water retention sheet of the hydroponics bed penetrates the water retention sheet and is retained. In addition, since the hydroponics bed is gently inclined, the nutrient solution is evenly supplied to the entire water retaining sheet by natural flow. Excess nutrient solution can be collected from the lower part of the gentle slope. Therefore, an appropriate amount of nutrient solution is always held in the water retention sheet. And due to the capillary phenomenon, the nutrient solution penetrates from the water retention sheet of the hydroponics bed through the root shield sheet to the water absorbing material at the bottom of the cultivation tank, and the nutrient solution is supplied into the cultivation tank. Thereby, the moisture environment in a cultivation tank can be stabilized. Therefore, the growth of plant seedlings is improved.
[0025]
In addition, even when the roots of plant seedlings grow and penetrate the bottom of the cultivation bag, the roots can enter the water retention sheet of the hydroponics bed by the root shielding sheet laid on the upper surface of the water retention sheet. Absent. Therefore, when moving a cultivation tank, a root is not damaged.
[0026]
The seedling raising apparatus according to the present invention is a hydroponic culture constructed by laying a water-retaining sheet on the surface of the bottom surface of a flat plate with a gentle slope, and laying a water-permeable root-shielding sheet on the surface of the water-retaining sheet A bed, a liquid supply mechanism for supplying water or nutrient solution to the water retention sheet from above the hydroponics bed, and a waste liquid mechanism for discharging excess water or excess nutrient solution from below the hydroponics bed It is characterized by having.
[0027]
In the seedling raising device configured as described above, the cultivation tank as described above is placed on the upper surface of the root shielding sheet of the hydroponics bed, and water or nutrient solution is supplied to the water retention sheet by the liquid supply mechanism. Water or nutrient solution penetrates the water retaining sheet and flows down the gentle slope and spreads uniformly throughout the water retaining sheet. In addition, surplus irrigation is discharged from below the slope of the hydroponics bed by the waste liquid mechanism. The water or nutrient solution retained in the water retaining sheet is absorbed into the cultivation tank by capillary action through the water-permeable root shielding sheet, and the cultivation tank is irrigated.
[0028]
Thus, by performing irrigation using the capillary phenomenon, the cultivation tank is not excessively irrigated, and the cultivation tank can be maintained in a moderately moist state. Moreover, since the water retention sheet | seat of a hydroponics bed always hold | maintains moisture, watering to the cultivation tank by a capillary phenomenon is always performed stably. Therefore, the water environment of the cultivation tank is very stable, and the growth of plant seedlings can be improved.
[0029]
In addition, since the root shielding sheet is laid on the upper surface of the water retention sheet, plant roots do not enter the water retention sheet. Accordingly, it is possible to prevent the root of the plant from being broken and damaged by the movement of the cultivation tank.
[0030]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view of a cultivation tank used in the embodiment of the present invention, and FIG. 2 is a cross-sectional view of a main part of the cultivation tank of FIG. The cultivation tank 1 is configured by laying a water-absorbing material 3 on the inner bottom surface of a cultivation bag 2 in which a sheet having a permeability is formed in a bag shape, and filling the cultivation bag 4 with a culture soil 4.
[0031]
In the present embodiment, a polyethylene bag is used for the cultivation bag 2 as an example of a permeable sheet. This is because it is excellent in air permeability, water permeability and weather resistance and has high strength, so that the strength of the cultivation bag 2 can be increased to reduce the weight. In addition, the walliff is relatively inexpensive and suitable for use as a consumable. Furthermore, since it can be freely cut using a scissors and can be easily bonded by heat sealing (heat sealing), it is excellent in workability.
Here, the term “warif” refers to the continuous supply of vertical webs (longitudinal stretched and reinforced fine split webs) and horizontal webs (laterally stretched and reinforced finely split webs), and heat fusion while expanding and laminating. A non-woven fabric of polyolefin resin obtained by wearing. A large number of holes having a diameter of about 0.3 to 2.0 mm are formed on the surface of the walliff, and the root crown of the root of the plant can penetrate the holes.
[0032]
The cultivation bag 2 is configured by folding a short side of a rectangular walliff having a length of 40 to 60 cm and a width of 20 to 30 cm in two, and heat-sealing the peripheral ends.
[0033]
In the present embodiment, a polyester nonwoven fabric is used as an example of the water absorbing material 3. The water absorbing material 3 is a rectangle having a length of 50 to 60 cm and a width of 5 to 10 cm, and a thickness of 3 to 5 cm. Here, the reason why the polyester nonwoven fabric is used as the water absorbing material 3 is that it is easy to process, has good water absorption, is inexpensive, and does not discharge harmful substances even when burned in the disposal process. is there.
[0034]
As the soil 3, a mixture of peat moss and pearlite is used. In addition, in order to further improve water retention / fertilization, a superabsorbent polymer may be mixed in an amount of 0.5 to 1.0% by volume.
[0035]
Openings 5 are opened at appropriate intervals on the upper surface of the cultivation bag 2. Through this opening 5, seedlings of the plant 6 are planted on the soil 4.
[0036]
FIG. 3 is a schematic cross-sectional view of a seedling raising apparatus according to an embodiment of the present invention.
The seedling raising apparatus 10 according to the present embodiment has a hydroponics bed 14 in which a water retention sheet 12 is laid on the inner bottom surface of a plastic flat box-like container 11 and a root shielding sheet 13 is laid on the upper surface. . The hydroponics bed 14 is provided with an inclination so that the inner bottom surface of the container 11 has a gentle slope shape. And the water supply pipe 15 which supplies water or a nutrient solution to a water retention sheet | seat is provided above the inclination of the hydroponics bed 14. The other end of the water supply pipe 15 is connected to a liquid supply tank 16, and a pump 17 is provided in the middle thereof. Water or nutrient solution stored in the liquid supply tank 16 is pumped up by the pump 17 and supplied to the water retention sheet 12. These liquid supply tank 16, water supply pipe 15, and pump 17 constitute a liquid supply mechanism.
[0037]
A drainage groove 18 is provided below the slope of the hydroponics bed 14, and the drainage groove 18 is connected to the liquid supply tank 16 by a drainage pipe 19. The water or nutrient solution drained from the hydroponics bed 14 to the drain groove 18 is returned to the feed tank 16 through the drain pipe 19. These drain grooves 18 and drain pipes 19 constitute a drainage mechanism.
[0038]
A water level gauge 20 for detecting the water level in the tank is provided in the liquid supply tank 16. Then, when the water level in the tank detected by the water level gauge 20 becomes equal to or lower than the predetermined water level, water or nutrient solution is additionally supplied from the water supply pipe 21 connected to the liquid supply tank 16.
[0039]
As the water retention sheet 12, a polyester nonwoven fabric having a thickness of 3 to 5 mm is used.
[0040]
Next, the plant cultivation method using the above cultivation tank 1 and the seedling raising apparatus 10 is demonstrated. First, a seedling of a plant 6 is planted on the culture soil 4 through each opening 5 of the cultivation tank 1. Then, the cultivation tank 1 in which the seedlings of the plant 6 are planted is placed side by side on the upper surface of the root shielding sheet 13 of the hydroponics bed 14 as shown in FIG. At this time, it arranges so that the longitudinal direction of the cultivation tank 1 may become perpendicular | vertical to the inclination direction of the hydroponics bed 14.
[0041]
In this state, water or nutrient solution is supplied from the water supply pipe 15 to the hydroponics bed 14. The supplied water or nutrient solution penetrates into the water retention sheet 12. On the other hand, since the bottom surface of the container 11 is gently inclined, water or nutrient solution exceeding the water retention capacity of the water retention sheet 12 flows down the inclination and spreads throughout the water retention sheet. Further, excess water or nutrient solution flows into the drainage groove 18 provided below the slope, and is returned to the liquid supply tank 16 through the drainage pipe 19. In this way, water or nutrient solution is uniformly supplied to the water retention sheet 12, and an appropriate amount of water or nutrient solution is retained.
[0042]
The water or nutrient solution retained in the water retention sheet 12 is sucked up by the water absorbing material 3 provided on the bottom surface of the cultivation bag 2 of the cultivation tank 1 through the root shielding sheet 13 by capillary action. The water or nutrient solution sucked up by the water absorbing material 3 is supplied to the culture soil 4 as needed when the culture soil 4 is dried. Therefore, the soil 4 is always kept wet without being excessively irrigated. Therefore, the roots of the seedlings of the plant 6 are always kept in a moist state and the water stress is small, so that the growth of the plant 6 is good.
[0043]
Moreover, since the cultivation bag 2 whole has air permeability and water permeability, excess water is drained smoothly. Therefore, unlike the bag-type cultivation tank described in the above prior art, there is no concern that a drainage failure occurs due to the generation of algae.
[0044]
Furthermore, the surface of the cultivation bag 2 is always kept wet by the water that exudes from the cultivation soil 4. Therefore, when the temperature rises, the water on the surface of the cultivation bag 2 is actively evaporated, and there is an action of lowering the temperature of the culture medium 4 by latent heat at the time of evaporation. Therefore, even when the temperature is high in summer, the temperature increase of the culture medium 4 is suppressed, and the propagation of soil pests is suppressed. In addition, since the culture medium 4 is kept cool even in summer, plant root activity is good and plant growth is good. Therefore, a good quality seedling can be produced.
[0045]
In addition, when water is sprayed from the upper part of the plant, pests are likely to be transmitted by the scattered water, but by performing irrigation using capillary action as in this embodiment, the pests that are mediated by watering are used. Infection is unlikely to occur.
[0046]
Moreover, since the cultivation bag 2 is made of a transparent material, when the plant 6 grows, the roots of the plant 6 penetrate the cultivation bag 2 and protrude out of the cultivation bag 2. FIG. 4 is a diagram illustrating the root growth process of the plant 6 in the vicinity of the cultivation bag 2.
[0047]
In FIG. 4A, the root end 6 b of the parent root 6 a of the plant 6 extends as it grows and reaches the inner surface of the cultivation bag 2. Here, since the cultivation bag 2 is made of a material having penetrating roots, the root end 6 b of the parent root 6 a penetrates the mesh 2 a of the cultivation bag 2 and extends to the outside of the cultivation bag 2. The root end 6b of the parent root 6a of the plant extended to the outside of the cultivation bag 2 is dried by the outside air, and drying stress is applied to the root end 6b. Therefore, the root end 6b stops growing. Thereby, since the growth of the parent root 6a of the plant stops, no root winding occurs.
[0048]
Next, when the extension of the root end 6b stops, secondary root formation starts in the vicinity of the root end 6b of the parent root 6a. Although secondary root formation also occurs when the elongation of the root tip 6b is not stopped, the position is at a certain distance from the root tip 6b, and the fiber bundle element of the parent root 6a has a constant growth of the endothelium. If the stage is not reached, no secondary root progenitor is formed. That is, basically, the plant is preferentially elongated by the parent root 6a such as the main root and the primary root in order to stabilize the strain, so that the secondary root formation is delayed. Therefore, the root tip length (the length from the tip of the root to the position of the secondary root that first appears) becomes longer. However, when the extension of the root tip 6b stops due to drought stress, the secondary root 6c is formed in a compensatory manner near the root tip 6b (see FIG. 4B). Further, secondary root formation is promoted as much as the extension of the parent root 6a is stopped, and a relatively large number of thick and long secondary roots 6c are formed. Furthermore, a large number of hair roots 6d and 6d 'are formed remarkably in the vicinity of the root end 6b of the parent root 6a and in the secondary root 6c. These hair roots 6d and 6d 'have a high function of absorbing moisture in the soil 4 and improve nutrient absorption of plants. As a result, plant growth is improved.
[0049]
Thus, since secondary root formation is accelerated | stimulated by using the sheet | seat which has translucency as the bag 2 for cultivation, in the limited amount of cultivation soil 4, a root system with the high absorption efficiency of a nourishing water | moisture content is obtained. It is formed. And as a result of the improvement of the function of absorbing nutrient water of the plant, the growth of the plant is improved.
[0050]
Next, when the plant 6 has grown to a desired size, as shown in FIG. 5, the cultivation tank 1 is transported to the main field and placed on the straw 30 of the main field. As described above, the cultivation tank 1 is small and lightweight, and is configured to have a vertically long size and shape so that the cultivation tank 1 can be easily transported.
[0051]
When the cultivation tank 1 is placed on the straw 30 of the main field and watering is performed, after a while, the root of the plant 6 extends into the ground of the main field as shown in FIG. Thereby, it becomes the same as the state which planted the plant to the cocoon 30. Therefore, irrigation management becomes extremely easy as compared with the conventional bag-type cultivation method because it is sufficient to perform irrigation similar to field cultivation.
[0052]
Moreover, since the rhizosphere of the plant 6 spreads to the cocoon 30 and the rhizosphere volume is increased, the growth of the plant 6 is also improved.
[0053]
Furthermore, when root vegetables are cultivated as the plant 6, at the seedling stage, cultivation is performed while controlling the environment with the seedling raising device 10 described above, and when the root grows, it is transferred to the main field and roots in the ground of the main field. Grow. This makes it possible to cultivate root vegetables such as radish, carrots and other straight roots, and potatoes such as potatoes and sweet potatoes where the basement is enlarged or grows over a wide area.
[0054]
【Example】
FIG. 6 is a view showing a state in which a seedling of a saladna is grown by the seedling raising apparatus according to the embodiment of the present invention, and FIG. 7 is a state in which the seedling of the saladna grown by the seedling raising apparatus of FIG. FIG. As a result of the cultivation experiment, it was confirmed that Sardana large enough to be shipped to the market can be cultivated. Moreover, as can be seen from FIG. 7, the roots of Sardana are growing in the soil of the cultivation field from within the cultivation tank by placing the cultivation tank on the straw of the main field and continuing the cultivation. I understand.
[0055]
【The invention's effect】
As described above, according to the plant cultivation method according to the present invention, since it is only necessary to place the cultivation tank on the main field, there is no need for planting to the main field after seedling, and the same cultivation tank from seedling to harvesting. Can be carried out consistently, and labor saving in farming can be achieved.
[0056]
Moreover, since the water retention capacity of the cultivation tank can be increased and the cultivation soil can be reduced by laying a water absorbing material on the bottom of the cultivation tank, the cultivation tank can be reduced in weight. Therefore, labor saving of the cultivation tank transportation work is achieved.
[0057]
Moreover, since the water environment in the cultivation tank at the time of raising seedling is stabilized, the growth of roots in the cultivation tank is good and irrigation management after raising seedling is easy. Furthermore, since the rooting of the plant is prevented during the seedling raising and the generation of the side roots is promoted, the absorption efficiency of the nourishing moisture of the roots in the cultivation tank is enhanced. Therefore, high quality seedlings can be raised.
[0058]
Furthermore, since the rhizosphere of the plant is formed in the ground of the main field after raising seedlings, it can be applied to the cultivation of root vegetables.
[0059]
Moreover, according to the seedling raising apparatus which concerns on this invention, by performing irrigation using a capillary phenomenon, a cultivation tank is not irrigated excessively and it can maintain a cultivation tank in a moderately moist state. Moreover, since the water retention sheet | seat of a hydroponics bed always hold | maintains moisture, watering to the cultivation tank by a capillary phenomenon is always performed stably. Therefore, the water environment of the cultivation tank is very stable, and the growth of plant seedlings can be improved.
[Brief description of the drawings]
FIG. 1 is a perspective view of a cultivation tank used in an embodiment of the present invention.
FIG. 2 is a cross-sectional view of a main part of the cultivation tank of FIG.
FIG. 3 is a schematic cross-sectional view of a seedling raising apparatus according to an embodiment of the present invention.
FIG. 4 is a diagram illustrating a process of forming a root system of a plant.
FIG. 5 is a diagram showing a state in which a cultivation tank is placed on a straw of the main farm and a plant is grown.
FIG. 6 is a view showing a state in which a seedling of a saladina is being raised by a seedling raising apparatus according to an embodiment of the present invention.
FIG. 7 is a diagram illustrating a state in which a seedling of Saladana grown by the seedling raising apparatus of FIG.
FIG. 8 is a cross-sectional view of a main part of a conventional bag type cultivation tank.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Cultivation tank 2 Cultivation bag 3 Water absorbing material 4 Culture soil 5 Opening 6 Plant 10 Seedling device 11 Container 12 Water retention sheet 13 Root shielding sheet 14 Hydroponics bed 15 Water supply pipe 16 Liquid supply tank 17 Pump 18 Drainage groove 19 Drainage pipe 20 Water level gauge 21 Water supply pipe 30 畝

Claims (3)

Planting seedlings in a cultivation tank constructed by laying a water-absorbing material on the inner bottom surface of the bag for cultivation formed with a sheet having a permeability, and filling culture medium in the bag for cultivation,
A plant cultivation method comprising cultivating the plant by placing the cultivation tank on the ground of a main field and extending the root of the plant into the ground when the plant has grown to a desired size. When raising the plant,
On the root shielding sheet of a hydroponics bed constructed by laying a water retentive sheet on the surface of the bottom surface of a flat container with a gentle slope and laying a water permeable root shielding sheet on the surface of the water retaining sheet The cultivation tank is placed on
The plant cultivation according to claim 1, wherein irrigation is performed by allowing the nutrient solution to flow into the water retaining sheet and causing the nutrient solution to penetrate into the cultivation tank. Method. A hydroponics bed constructed by laying a water retentive sheet on the surface of the flat container bottom surface with a gentle slope, and a water permeable root shield sheet laid on the surface of the water retentive sheet;
A liquid supply mechanism for supplying water or nutrient solution to the water retaining sheet from above the hydroponics bed;
A waste fluid mechanism for draining excess water or surplus nutrient solution from below the hydroponics bed;
A seedling raising device characterized by comprising:

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