JP2009034055A - Apparatus for raising seedling and system for raising seedling equipped with the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an apparatus for raising seedling which can culture seedlings by an easy method without controlling an environment for culturing the seedlings to a high humidity and can healthy raise the seedlings, while reducing the risk of disease spreading. <P>SOLUTION: This apparatus for raising seedling including affusion trays 20 each having a drain port 24, a temperature-controlled water-circulating and supplying means 30 which has water supply portions for supplying water Wt controlled to a prescribed temperature to the affusion trays 20 and recovers the water Wt in the affusion trays 20 drained from the drain ports 24, a plurality of heat-conducting containers 40 disposed on the affusion trays 20 into which the water Wt is circulated and supplied, and seedling-holding plates 50 for approximately vertically holding a plurality of seedlings Sc in a state that opened ends are dipped in the culture water Wa received in the heat-conducting containers 40, wherein the temperature of the culture water Wa is controlled with the water Wt flowing in the affusion trays 20 for each heat-conducting container 40 to culture the seedlings Sc. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a seedling raising device and a seedling raising system provided with the same, and more particularly to a seedling raising device for growing plant seedlings firmly with a simple device configuration and a seedling raising system provided therewith.

In the production of plants such as vegetables, flower buds and trees, the required nursery area and labor force vary greatly due to seasonal fluctuations in demand for seedlings. For this reason, there is a technology for storing seedlings for a certain period of time in a low light and low temperature environment in order to level the seasonal fluctuations in the nursery area and labor force and to efficiently and stably supply seedlings.
As seedlings stored in such a low-light and low-temperature environment, in addition to seedlings with roots, cutting seedlings with cut roots or root-cutting seedlings (grafted seedlings) are used.

  When producing cuttings, seedlings and shoots of plants are generally collected as cuttings, planted in a medium, cured until rooted in a low-temperature environment, and then stored in a low-light and low-temperature storage as described above. There is a case. In this case, cuttings (seedlings) immediately after being embedded in the medium do not have roots at the open end, which is the lower end, and have low water absorption capacity and are susceptible to water stress. In general, the curing environment is kept at high humidity in order to reduce the loss.

  On the other hand, when producing grafted seedlings, first, the roots and ears of rootstock seedlings that have been bred in advance are cut out to prepare rootstocks, and the roots of seedlings that have been bred in advance are excised. Prepare Hogi. Next, by inserting the cutting part of the hogi and the cutting part on the head part side of the rootstock into the cylindrical graft joint fitting, and keeping the cuttings and the rootstock joined together by bringing the cut surfaces into close contact with each other , Form grafted ears (seedlings). Next, the open end (rootstock side) of the graft cutting head may be planted in a molding medium, placed under low light, and stored at a low temperature for a certain period (for example, several weeks). At this time, the joints of the graft cuttings are not completely connected, and the water absorption capacity of the rootstock is weak, so it is necessary to maintain the inside of the storage at high humidity in order to prevent transpiration and water supply There is. Next, in order to promote survival and rooting, it is gradually acclimatized to the outdoor environment while curing the graft cuttings. During this curing and acclimatization period, the joints of the graft cuttings are alive and rooted from the rootstock. Thereafter, the grafted seedlings that have been alive are planted in the medium in the pot.

Recently, various methods for promoting rooting of cuttings have been proposed.
In Patent Document 1, cuttings are stored in air at 1 to 5 ° C. in a refrigerator for 6 to 21 days, subjected to low-temperature treatment, then cuttings are landed, and then the lower ends of the cuttings are immersed in an aqueous rooting agent solution. Then, rooting promotion treatment is performed, and then cuttings are planted in the culture soil in the pot, the pot is placed on a saucer in which water of 15 to 30 ° C. is stored, and the air atmosphere is adjusted to a relative humidity of 80 to 90%. A method for rooting cuttings by curing for 4 to 6 days is disclosed.
Further, in Patent Document 2, cuttings are planted in an insertion floor soil in a seedling box, and the seedling box is placed on a seedbed open ground laid with a heating wire, covered with a vinyl tunnel and sealed, 70 to 90% A method for rooting cuttings by heating at a temperature of about 20 to 25 ° C. in the daytime and about 15 ° C. in the nighttime while maintaining a high humidity of 5 is disclosed.
Further, Non-Patent Document 1 discloses that the roots of cuttings and grafted cuttings are immersed locally in a warm culture solution in a low light and low temperature environment, thereby efficiently rooting while suppressing plant consumption. A method of facilitating is disclosed.

Patent Document 3 discloses a method for raising seedlings by a irrigation method in a storage room in a low temperature and high humidity atmosphere. In this case, irrigation trays are placed on each shelf of the multistage shelf via a resin porous sheet, a plurality of cell trays having a plurality of recesses are installed in each irrigation tray, and seedlings planted in culture soil in pots are placed. Install in each recess of each cell tray. In addition, a water supply pipe is laid on one end side of each irrigation tray, the culture solution is supplied from the water supply pipe into the irrigation tray, and the culture solution spreads uniformly on the back side of the cell tray by the porous sheet. A small hole is formed in the bottom wall of each concave portion of the cell tray, and the culture solution is supplied from the small hole to the root of the seedling by capillary action. In addition, excess culture solution is discharged | emitted outside from the drain outlet formed in the other end side of the irrigation tray.
JP 2003-304760 A JP-A-5-328840 JP 2001-346450 A Terakura, Shibuya, and two others, “Effects of heating treatment of short-term supply cultures during low-temperature storage of cucumber cuttings on quality during storage and rooting after storage”, Biological environment regulation, 42 (2) , P. 331-337, 2004

As described above, cuttings immediately after being transplanted to the culture medium and grafted cuttings where joints are not completely connected (hereinafter collectively referred to as seedlings) are difficult to absorb moisture and are subject to water stress. Since it is easy to wither, it is necessary to cure the environment atmosphere at a low temperature and high humidity in order to suppress the loss of water due to transpiration, which causes the following problems.
(A) Special environmental control equipment is required to increase the humidity at a low temperature, and the equipment cost is high.
(B) Since young seedlings are in a high humidity environment, they are susceptible to diseases caused by mold and the like.
(C) By storing young seedlings in a high-humidity environment, the seedlings tend to be soft in the subsequent curing / acclimation process.
(D) When curing under natural light such as in a greenhouse, it is necessary to increase the humidity in the curing facility by sealing it with a film or the like, but it is difficult to control the curing temperature environment.
(E) In the case of the irrigation method, since the liquid film of the culture solution is formed on the irrigation tray to a height of several millimeters higher than the porous sheet, if even a single seedling becomes ill, the pathogen will pass through the culture solution. May be transmitted to other seedlings in the same irrigation tray, and the risk of disease transmission is high. In addition, when multiple irrigation trays are installed in multiple stages and the culture solution supplied to multiple irrigation trays is circulated and used, there is a risk that the disease may propagate to the seedlings in all the irrigation trays, which is more risky. Rise.

  In view of the above problems, the present invention provides a seedling raising apparatus capable of curing a seedling by a simple method without growing the environment for curing the seedling at high humidity, and capable of growing the seedling firmly while reducing the risk of disease transmission. The seedling system provided with it is provided.

Thus, according to the present invention, there is provided an irrigation tray having a drain outlet, and a water supply section for supplying temperature controlled water at a predetermined temperature to the irrigation tray, and collecting the temperature controlled water in the irrigation tray discharged from the drain outlet. Temperature-controlled water circulation supply means, a plurality of heat conductive containers installed on an irrigation tray to which temperature-controlled water is circulated, and an open end immersed in the curing water stored in the heat conductive container And a seedling holding plate that holds a plurality of seedlings substantially vertically in a state, and is configured to cure the seedlings by adjusting the temperature of the curing water for each heat conductive container by temperature-controlled water flowing in the irrigation tray A seedling device is provided.
Moreover, according to another viewpoint of this invention, the seedling system provided with the storage room provided with the air conditioner which can control room temperature, and the said seedling raising apparatus installed in this storage room is provided.

The present invention has the following effects.
(1) The seedlings can be kept immersed in curing water to a position where they can absorb water, thereby reducing rooting of seedlings without increasing the humidity inside the storage, while cutting seedlings are efficiently rooted. It can be promoted well, and in the grafted seedlings, the junction of the rootstock and the hogi can be erected efficiently. In addition, special and expensive equipment for maintaining the curing environment at low temperature and high humidity is not required, and seedlings can be cured with a simple device that does not require equipment costs.
(2) By controlling the storage room to a low temperature atmosphere, the water vapor saturation becomes small and the moisture transpiration of young seedlings can be easily suppressed, and light irradiation can be weakened under a low temperature atmosphere, It can be simplified.

(3) Since seedlings can be cured for each heat-conducting container, even if seedlings in one heat-conducting container are ill, diseases to other seedlings in other heat-conducting containers are transmitted. Can be prevented, and the risk of disease transmission can be reduced.
(4) Since a plurality of thermally conductive containers are installed in the irrigation tray, the amount of circulating temperature-controlled water can be reduced, and the temperature-controlled water circulation supply means can be configured in a compact manner. Space can be achieved.
(5) Use different types of curing water for each heat-conducting container, for example, curing water such as water, water added with a culture solution, water added with a plant hormone agent for promoting rooting, etc. Can do. Therefore, by using optimal curing water according to a plurality of types of plants having different rooting characteristics, a plurality of types of seedlings can be simultaneously cured in the same seedling raising apparatus.

  The seedling raising apparatus of the present invention has an irrigation tray having a drain outlet and a water supply unit for supplying temperature controlled water at a predetermined temperature to the irrigation tray, and collects the temperature controlled water in the irrigation tray discharged from the drain outlet. Temperature-controlled water circulation supply means, a plurality of heat conductive containers installed on an irrigation tray to which temperature-controlled water is circulated, and a state in which the open end is immersed in the curing water stored in the heat conductive container And a seedling holding plate that holds a plurality of seedlings substantially vertically, and is configured to cure the seedlings by adjusting the temperature of the curing water for each thermally conductive container by temperature-controlled water flowing in the irrigation tray It is characterized by.

  Plants targeted by the present invention are not particularly limited. For example, vegetables such as eggplant, tomato, cucumber, pepper, shishito, okra, bitter gourd, flower chrysanthemum, carnation, gerbera, etc. (herbaceous plant), oleander, ume The present invention can be applied to plants such as trees (woody plants) such as camellia, rose, cherry, apple, grape, cucumber, bayberry, acacia and eucalyptus, and can be applied to both cuttings and grafted seedlings.

  The seedling raising apparatus of the present invention may have a configuration in which a plurality of irrigation trays are provided and a multi-stage shelf for arranging the plurality of irrigation trays in a plurality of upper and lower stages. In this case, the temperature control water is circulated and supplied to the irrigation trays at each stage as described above, and a plurality of thermally conductive containers are placed therein. Each thermally conductive container contains the curing water and is used as the curing water. Needless to say, a seedling holding plate for holding a plurality of seedlings in an immersed state is placed.

  The temperature-controlled water circulation supply means includes, for example, a temperature-controlled water tank, a temperature adjusting unit that adjusts the temperature of the temperature-controlled water in the temperature-controlled water tank to a predetermined temperature, the water supply unit, and a drain outlet of the irrigation tray A circulation pipe that connects a temperature control water tank, and the water supply unit includes a watering pipe installed in an irrigation tray, a water supply pipe that connects the temperature control water tank and the watering pipe, and the water supply pipe. The pump is configured to have a pump for sending the temperature-controlled water in the temperature-controlled water tank, and a flow rate adjusting valve provided in the vicinity of the watering pipe in the water supply pipe.

The temperature adjustment water tank is preferably configured with a heat insulating structure capable of keeping the temperature adjustment water inside, and for example, a plastic tank with foamed plastic as an outer layer can be used.
The watering pipe is formed by, for example, forming a plurality of through-holes along the longitudinal direction in a pipe whose mouth on one end is closed so that temperature-controlled water is uniformly supplied into the watering tray. It is preferable to arrange on the side opposite to the mouth.

  The temperature adjusting unit is not particularly limited as long as the temperature-adjusted water can be adjusted to a predetermined temperature, and includes, for example, a heater and a temperature control device (for example, a thermostat). When the seedling device is installed in a place without air conditioning equipment, the temperature adjustment water may rise above a predetermined temperature. In this case, a cooling device called a chiller (cold water preparation device) that cools the temperature adjustment water is used. You may use together.

  The flow rate adjusting valve adjusts the temperature of the temperature control water in the irrigation tray by adjusting the flow rate of the temperature control water supplied to the irrigation tray, and reduces the temperature difference of the temperature control water in each stage. It is. That is, as the irrigation tray is in the upper stage, the water supply path from the temperature adjustment water tank becomes longer, so the temperature of the temperature adjustment water tends to decrease. Therefore, by operating the flow rate adjusting valve at each stage to adjust the flow rate of the temperature-controlled water supplied to the irrigation tray for each stage, the temperature variation of the temperature-controlled water in the irrigation tray at each stage is eliminated. be able to.

  In the present invention, the irrigation tray has a shallow box shape having a bottom wall and a peripheral wall and opening upward. The temperature control water of a predetermined temperature is circulated and supplied to the irrigation tray, and it is necessary to maintain the temperature of the curing water in the plurality of thermally conductive containers at the predetermined temperature by the temperature adjustment water. Further, a material having heat insulating properties and water shielding properties is preferable, and it is preferable that processing is easy and low cost. For example, a closed cell type foamed polystyrene, foamed plastic such as foamed vinyl chloride is suitable.

The irrigation tray preferably has a plurality of support protrusions on the bottom surface for supporting the thermally conductive container. If it does in this way, a clearance gap will be formed between the bottom face of an irrigation tray and a heat conductive container by a support protrusion, and temperature control water can be poured into this clearance gap. Therefore, since the temperature-controlled water contacts the relatively large bottom wall of the heat conductive container, the temperature of the curing water can be adjusted efficiently.
The shape of the support protrusion is not particularly limited, and for example, it can be a convex shape extending in one direction or a convex shape obtained by finely dividing the convex shape into a plurality of portions. If it does in this way, temperature control water can be smoothly flowed to one direction by a support protrusion, and the temperature gradient of temperature control water in an irrigation tray can be suppressed small. The support protrusion may be formed integrally with the irrigation tray or may be a separate part from the irrigation tray.

  The irrigation tray may have a dam portion on one end side of the bottom surface, and the drain outlet may be arranged between the outer periphery of the irrigation tray and the dam portion. In this way, even if temperature-controlled water is continuously supplied into the irrigation tray, if the water surface is higher than the weir part, the temperature-controlled water will be discharged from the drainage port beyond the weir part and used for circulation. The water surface of the temperature-controlled water in the irrigation tray can be maintained at a certain height. Moreover, the temperature control water in the irrigation tray is set to a certain level, so that the curing water in the heat conductive container can be adjusted to a predetermined temperature more efficiently.

  The irrigation tray may have an inclined surface portion that is inclined upward from the one end side of the bottom surface to the other end side on the opposite side, and the dam portion may have a notch portion in part. . In this way, when all the temperature control water in the irrigation tray is drained at the time of cleaning, the temperature control water flows down the inclined surface portion and is naturally discharged from the cut portion of the weir portion to the drain outlet, so that drainage is facilitated. . In this case, the support protrusion may be configured to horizontally support the thermally conductive container by canceling the inclination of the inclined surface portion. In this way, since the heat conductive container is supported horizontally by the support protrusion, the depth of the curing water in the heat conductive container becomes uniform, and the open end of the seedling is immersed in the curing water at a uniform depth. It becomes easy to do.

  In the present invention, the heat conductive container is a box-shaped container having an upper opening composed of a bottom wall and a peripheral wall, and the constituent material is preferably a metal material having good heat conductivity and excellent water resistance. For example, stainless steel is preferable.

The seedling holding plate has a shape and size substantially the same as that of the heat conductive container so that the seedling holding plate can be placed on the heat conductive container or on the surface of the curing water in the heat conductive container. What consists of a heat insulation plate which has several small holes to insert is preferable. In addition to the role of holding the young seedlings, the seedling holding plate also serves as a lid for the heat conductive container, and also functions to keep the curing water warm, suppress evaporation, and prevent foreign matter from being mixed into the curing water. In addition, the form which sets a seedling holding plate to a heat conductive container is mentioned later in detail.
As the material for the seedling holding plate, foamed plastics such as closed-cell foamed polystyrene and foamed vinyl chloride, which are heat-insulating and water-proof, are easy to process and low in cost, like the irrigation tray. is there.

The multi-stage shelf can have a structure including a frame, a top plate attached to the frame, and a plurality of upper and lower shelf plates, and may further include left and right side plates and a back plate.
In addition, when it is necessary to irradiate the seedlings, a light source may be provided on the lower surface of the top plate of the multi-level shelf and the lower surface of the shelf plate to irradiate the young seedlings. When the air in the space partitioned by the shelf is heated by the heat generated by the light source, a fan that forcibly vents the space may be provided on the back plate. Note that the fan may not be provided when the amount of light from the light source is small.

  The seedling raising apparatus of this invention may further be equipped with the heat insulation lid | cover which covers between the outer periphery of an irrigation tray and the heat conductive container installed on the irrigation tray other than the above-mentioned component. With this heat insulating lid, heat radiation from the inside of the irrigation tray can be suppressed and thermal efficiency can be increased.

The seedling raising apparatus of this invention can combine the above-mentioned component suitably.
Moreover, the above-mentioned seedling raising apparatus can be installed in a storage room equipped with an air conditioner capable of controlling the room temperature to constitute a seedling raising system. According to this seedling raising system, young seedlings can be cured at an optimum atmospheric temperature in a storage room isolated from the outside, and the risk of disease transmission can be further reduced.
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

(Embodiment 1)
FIG. 1 is a schematic configuration diagram showing a seedling raising system provided with a seedling raising device of Embodiment 1 of the present invention, and FIG. 2 is a front sectional view showing a schematic configuration of the seedling raising device of Embodiment 1.
As shown in FIG. 1, the seedling raising system includes a storage room R provided with an air conditioner capable of controlling the room temperature, and a seedling raising apparatus 1 installed in the storage room R. In addition, in FIG. 1, the codes | symbols 2 and 3 represent the indoor unit and outdoor unit of an air conditioner.

  As shown in FIG. 1 and FIG. 2, the seedling raising device 1 includes a multistage shelf 10, a plurality of irrigation trays 20 installed on the multistage shelf 10 in a plurality of upper and lower stages, and temperature-controlled water Wt in each stage of the irrigation tray 20. The temperature-controlled water circulation supply means 30 for circulating supply, the thermal conductive container 40 containing the curing water Wa installed in the irrigation tray 20 at each stage, and the open end immersed in the curing water Wa in the thermal conductive container 40 Heat insulation covering between the seedling holding plate 50 that holds a plurality of cutting seedlings (young seedlings) Sc in a substantially vertical state and the outer peripheral edge of the irrigation tray 20 and the thermally conductive container 40 installed on the irrigation tray 20 And a sex lid 60.

  The multi-stage shelf 10 is attached to the left and right side plates 11, 11, the top plate 12 connecting the left and right side plates 11, 11, the shelf plate 13 arranged in a plurality of upper and lower stages, and the rear ends of the left and right side plates 11, 11. And a back plate 14 having a vent hole 14a. In Embodiment 1, the case of the multistage shelf 10 in which the upper and lower storage chambers 15 are formed by the top plate 12 and the four shelf boards 13 is illustrated, and the size and the number of shelves of the storage chambers 15 in each stage are illustrated. May be determined in consideration of the number of seedlings to be cured and workability in one curing device, for example, the vertical width of the storage chamber 15 is about 30 to 35 cm, the horizontal width is about 125 to 135 cm, The depth to the fan 72, which will be described later, is about 60 to 70 cm, and the number of shelves is about 3 to 6, but it is of course not limited to these, and the design can be changed freely.

  Further, in this multi-stage shelf 10, the lower surface of the shelf 13 in the second to fourth storage chambers 15 from the bottom and the top plate 12 in the uppermost storage chamber 15 so that the seedlings Sc being cured can be irradiated with light. A light source 71 made of a fluorescent lamp or an LED is installed on the lower surface of the housing, and the fan 72 is installed in the vent hole 14a of the back plate 14 in the storage chamber 15 in which the light source 71 is provided. ing. The fan 72 ventilates the storage chamber 15 in order to prevent the atmospheric temperature in the storage chamber 15 from rising due to heat generated by the light source 71, thereby preventing moisture from evaporating from the leaves of the seedling Sc. Is to do. Further, a cover 72 a having a ventilation hole that covers the front of the fan 72 so as to allow ventilation is attached to the back plate 14. Although not shown, the fan may be integrated with the case. In this case, the fan case can be attached to the rear surface of the vent hole portion of the back plate 14. In addition, when the light amount of the light source 71 irradiated to the young seedling Sc is small, the ambient temperature in the storage quality 15 does not rise so much, so the fan 72a is unnecessary.

FIG. 3 is a view showing a state in which the thermally conductive container 40 is installed on the irrigation tray 20 in the first embodiment, FIG. 3 (a) is a front sectional view, and FIG. 3 (b) is a right sectional view. It is. Moreover, FIG. 4 is the perspective view which looked at the irrigation tray 20 in Embodiment 1 from the front side.
The irrigation tray 20 has a rectangular bottom wall 21 and a peripheral wall 22 rising from the outer peripheral edge of the bottom wall 21. This irrigation tray 20 is formed in the same size as the storage chamber 15 of the multistage shelf 10 with the foamed polystyrene as a whole. For example, the left and right width of the bottom wall 21 is about 120 to 130 cm, the front and rear width is about 60 to 65 cm, and the height of the surrounding wall is about 8 to 12 cm.

The bottom surface of the bottom wall 21 of the irrigation tray 20 includes an inclined surface portion 21a inclined downward from the rear wall portion 22a of the peripheral wall 22 toward the front wall portion 22b, and the front wall portion 22b and the inclined surface portion 21a of the peripheral wall 22 are arranged. A drainage groove 23 having a groove width of about 2 to 5 mm is formed between the drainage groove 23 and a drainage port 24 is formed at the end on the front side of the drainage groove 23.
Further, the irrigation tray 20 is installed in a state in which the drain port 24 protrudes forward from the shelf 13 of the multi-stage shelf 10, and in order to connect the drain port 24 and a circulation pipe 35 to be described later, for example, The cylindrical connecting portion 24b is press-fitted from below into the drain port 24 and connected without leaking water.

Further, the irrigation tray 20 has a dam portion 25 having a cut portion 25a at the center between the inclined surface portion 21a and the drainage groove 23. The height of the dam portion 25 is about 15 to 20 mm, and the thickness is about 5 to 10 mm.
Furthermore, a plurality of convex support protrusions 26 extending in parallel to the gradient are formed in parallel on the inclined surface portion 21a at equal intervals. The height of the support protrusion 26 from the inclined surface portion 21a is continuously increased toward the downward gradient side so as to cancel the gradient of the inclined surface portion 21a. The length of the support protrusion 26 is about 450 to 550 mm, the width is about 15 to 20 mm, the height of the highest part is about 15 mm, the height of the lowest part is about 5 mm, and the height difference is about 10 mm.

  The support protrusion 26 forms a gap between the thermally conductive container 40 placed on the support protrusion 26 and the inclined surface portion 21 a of the irrigation tray 20, and this gap is the temperature supplied to the irrigation tray 20. It becomes a flow path for the conditioning water Wt to flow. Further, the inclined surface portion 21a has a function of collecting the temperature-controlled water Wt to the dam portion 25 side when all of the temperature-controlled water Wt in the irrigation tray 20 is drained. It is easily discharged from 25a to the drain port 24.

  As shown in FIGS. 1 to 4, the temperature adjustment water circulation supply means 30 includes a temperature adjustment water tank 31, a temperature adjustment unit 32 that adjusts the temperature of the temperature adjustment water Wt in the temperature adjustment water tank 31 to a predetermined temperature, A watering pipe 33 installed in the irrigation tray 20, a water supply pipe 34 that connects the temperature control tank 31 and the watering pipe 33, and a circulation pipe that connects the drain outlet 24 of the irrigation tray 20 and the temperature control water tank 31. 35, a pump 36 that sends the temperature-controlled water Wt in the temperature-controlled water tank 31 to the water supply pipe 34, and a flow rate adjusting valve 37 provided between the watering pipe 33 and the pump 36 in the water supply pipe 34.

The temperature control water tank 31 is composed of, for example, a polystyrene foam box body 31a and a lid 31b, and is installed in the lowermost storage chamber 15 of the multistage shelf 10.
The temperature adjustment unit 32 includes a heater 32a and a thermostat c32b installed in the temperature adjustment water tank 31.
The pump 36 is a submersible pump installed in the temperature control water tank 31.
As the temperature control water Wt, tap water or groundwater is usually used.

The watering pipe 33 is formed by plugging and closing one opening of a straight resin pipe (for example, a vinyl chloride resin pipe), and forming a plurality of through holes 33a along the longitudinal direction of the pipe. It is installed in the left-right direction along the uppermost edge of the inclined surface portion 21a of the stage irrigation tray 20.
The water supply pipe 34 is attached by a mounting bracket along the rear end of the left side plate 11 of the multistage shelf 10, the lower end thereof is connected to the discharge port of the pump 36, and the upper end is disposed on the uppermost irrigation tray 20. The sprinkling pipe 34 is connected to the open end, and the middle portion is branched and connected to the other stages of the sprinkling pipe 34. And the flow volume adjustment valve 37 is provided in the near side of the seedling raising apparatus 1 which is the vicinity of the water spray pipe 34 of each stage in the water supply pipe 34.
The circulation pipe 35 is attached by a mounting bracket along the front end of the right side plate 11 of the multi-stage shelf 10, the lower end thereof is connected to the temperature control water tank 31, and the upper end is connected to the drain outlet 24 of the uppermost irrigation tray 20. The middle part branches off and is connected to the drain port 24 of the other stage irrigation tray 20.

  The heat conductive container 40 is a rectangular parallelepiped container made of stainless steel having a rectangular bottom wall and a peripheral wall rising from the outer peripheral edge of the bottom wall. The weir 25 and the water spray pipe 33 of the irrigation tray 20 It is formed in the size installed between. In the first embodiment, the case where two thermally conductive containers 40 are installed in the back and front of each stage of the irrigation tray 20 is illustrated, but the storage chamber 15, the irrigation tray 20 and the heat conduction of the multistage shelf 10 are illustrated. In consideration of the size and workability of the conductive container 40, three or more thermally conductive containers 40 may be installed in one irrigation tray 20. As a size of one heat conductive container 40, for example, a long side of about 580 to 620 mm, a short side of about 550 to 580 mm, and a height of about 50 to 65 mm are suitable, but of course not limited thereto.

  The seedling holding plate 50 is formed of a rectangular foamed polystyrene plate having a thickness of about 5 to 10 mm, and a plurality of small holes 51 having a size similar to the hypocotyl diameter of the seedling Sc (3 to 5 mm in diameter) are formed in a matrix. (See FIG. 5). The size of the seedling holding plate 50 is set according to the type of seedling, the number of seedlings held by one seedling holding plate 50, and the like. In this Embodiment 1, the case where the kind of seedling is a cutting seedling is illustrated.

  As shown in FIG. 1 to FIG. 3, in the case of the cutting seedling Sc, at least the cut surface of the open end (lower end) only needs to be immersed in the curing water Wa in the heat conductive container 40, so the seedling holding plate 50 is At least the long side is formed to a length that can be placed on the opening edge of the thermally conductive container 40. In the first embodiment, the seedling holding plate 50 is formed such that the long side and the short side are longer than the long side and the short side of the heat conductive container 40, and the opening of the heat conductive container 40 is completely formed by one sheet. However, as shown in FIG. 5, a plurality of seedling holding plates 50 may be formed so as to cover the heat conductive container 40. The size of the seedling holding plate 50 in this case is suitably about 580 to 620 mm on the long side and about 185 to 195 mm on the short side, but is not limited to this.

As the curing water Wa, tap water to which an appropriate amount of culture components, plant growth regulators and the like are arbitrarily added is used. Examples of the culture component include components such as nitrogen, phosphorus and potassium that are generally effective for raising seedlings (for example, Taiyo Kogyo Co., Ltd .: High Spirit), and plant growth regulators include auxins.
It is appropriate that the curing water Wa is contained in such an amount that the liquid level is about the sixth to eighth minutes of the heat conductive container 40.

The heat insulating lid 60 is made of a polystyrene foam frame having an L-shaped cross section having a thickness of about 5 to 10 mm. The appearance size and shape are almost the same as those of the irrigation tray 20, and the opening of the frame is equivalent to two seedling holding plates 50. Is almost the same size as
By installing the heat insulating lid 60 on the upper edge of the outer peripheral wall 22 of the irrigation tray 20, the opening edge of the heat insulating lid 60 is a seedling on the two thermally conductive containers 40 installed in the irrigation tray 20. It contacts the outer peripheral edge of the holding plate 50, and the inside of the irrigation tray 20 is blocked from the outside and kept warm.

Next, the operation state of the seedling raising system provided with this seedling raising device 1 will be described with reference to FIGS.
As shown in FIG. 1, when curing a large number of seedlings Sc in the storage R, the room temperature in the storage R is adjusted to a predetermined temperature, for example, 0 to 20 ° C. by the air conditioner.
On the other hand, as shown in FIGS. 2 and 3, in the seedling raising device 1, the light sources 71 at each stage emit light, and the fans 72 at each stage rotate to ventilate the storage chambers 15. As the fan 72 rotates, air convection as indicated by arrows in FIG. 1 occurs in the storage chamber R, and the ambient temperature in the storage chamber R including the storage chambers 15 in the seedling raising apparatus 1 becomes uniform. Note that the light source 71 and the fan 72 are not driven if light irradiation is not required for raising seedlings. Further, in the seedling raising apparatus 1, the temperature adjustment water Wt in the temperature adjustment water tank 31 is adjusted to a predetermined temperature by the temperature adjustment unit 32. At this time, the temperature control water Wt is for heating the curing water Wa, and the temperature of the curing water Wa is a temperature suitable for the type of cuttings to be cured Sc. For example, the temperature-controlled water Wt is adjusted to a temperature (for example, about 16 to 27 ° C.) that can be heated to about 15 to 25 ° C.

The temperature-controlled water Wt in the temperature-controlled water tank 31 whose temperature has been adjusted is pumped up by the pump 36 and sent to the water-sprinking pipes 33 at each stage through the water supply pipes 34, and almost from the plurality of through holes 33 a of the water-spreading pipes 33. The temperature-controlled water Wt is ejected at an equal flow rate and is uniformly supplied into the irrigation tray 20 at each stage.
The temperature-controlled water Wt supplied into the irrigation tray 20 descends the inclined surface portion 21a from the rear end side of the heat conductive container 40, is blocked by the dam portion 25, and the amount of water accumulates up to the height of the dam portion 25, so that the surplus amount Is discharged from the discharge port 24 through the weir 25, returned to the temperature adjustment water tank 31 through the circulation pipe 35, adjusted to a predetermined temperature, and supplied to the irrigation tray 20 again. During this time, the temperature control water Wt in the irrigation tray 20 is also drained from the cut portion 25a of the weir portion 25.

Thus, the temperature control water Wt is stored in the irrigation tray 20 by the weir 25 at a constant height while being supplied at a constant flow, and the temperature control water Wt having the same flow rate as the supplied flow exceeds the weir 25. To discharge. At this time, since the temperature control water Wt flows in the irrigation tray 20 at a flow velocity of 10 cm / sec or more, there is almost no temperature gradient between the temperature control water Wt on the upstream side and the downstream side in the irrigation tray 20.
By the way, since the water supply path | route from the temperature control water tank 30 becomes long so that the irrigation tray 20 becomes an upper stage, the temperature of the temperature control water Wt tends to fall. Therefore, in order to eliminate the temperature variation of the temperature control water Wt in the irrigation tray 20 of each stage, the flow rate of the temperature control water Wt supplied to the irrigation tray 20 of each stage is adjusted by the flow rate adjustment valve 37 of each stage. To do. That is, adjustment is performed to increase the flow rate as the upper stage is reached.

  Cured water Wa is heated to a predetermined temperature via the heat conductive container 40 by the temperature-controlled water Wt stored up to the height of the weir 25 in the irrigation tray 20. At this time, when the liquid level height of the curing water Wa from the bottom surface of the heat conductive container 40 is equal to or less than the liquid surface height of the temperature-controlled water Wt from the bottom surface, the curing water Wa is efficiently obtained. Although it can be heated to a predetermined temperature, if the temperature of the temperature-controlled water Wt and the flow rate can be adjusted to heat the curing water Wa to the predetermined temperature, the liquid level of the curing water Wa is It may be higher (for example, about twice) than the liquid level of the temperature-controlled water Wt. Such setting of the liquid level can be determined by adjusting the height of the dam portion 25, the height of the support protrusion 26, the height of the heat conductive container 40, and the like.

According to this seedling raising apparatus 1, since the cutting seedlings Sc in the respective heat conductive containers 40 are cured in an atmosphere of 0 to 20 ° C. with the open ends immersed in the curing water Wa of 15 to 30 ° C., Rooting is promoted and growth other than roots is suppressed.
Under the present circumstances, it is comprised so that the curing water Wa for immersing the open end of cutting seedling Sc may be isolate | separated for every heat conductive container 40, and the curing water Wa may be indirectly heated with the temperature control water Wt. Therefore, even if the cutting seedling Sc in one thermal conductive container 40 becomes sick, the disease does not propagate to the cutting seedling Sc in the adjacent thermal conductive container 40 through the curing water Wa. Loss can be kept to a minimum.

  Further, irrigation is achieved by providing the weir 25 and storing the temperature-controlled water Wt in a specific area in the irrigation tray 20 and by installing a heat conductive container 40 containing the curing water Wa in the specific area. The amount of circulating water can be greatly reduced as compared with the case where the curing water of a predetermined temperature is circulated and supplied in the tray and the open end of the cutting seedlings Sc is immersed and cured. As a result, it is possible to reduce the size of the circulating water tank, reduce costs and save space, and save energy when adjusting the circulating water to a predetermined temperature. In addition, blocking the curing water Wa and the temperature-controlled water Wt from the outside with the seedling holding plate 50 and the heat insulating lid 60 contributes to energy saving.

(Embodiment 2)
6A and 6B are views showing a state in which the heat conductive container 40 is installed on the irrigation tray 20 in the second embodiment. FIG. 6A is a right side sectional view, and FIG. 6B is a seedling holding plate. FIG.
The seedling raising apparatus of the second embodiment is for curing the grafted seedling (young seedling) S2, except that the grafted seedling S2 is mainly held in a state where the seedling holding plate 150 is floated on the surface of the curing water Wa. Is the same as in the first embodiment. In FIG. 5, the same components as those in the first embodiment are denoted by the same reference numerals. Hereinafter, differences from the first embodiment in the second embodiment will be mainly described.

The grafted seedling Sg is supported by a cylindrical connector 80 having an elastic periphery around the joint surface S _{3 in} a state where the diagonally cut joint surface S ₃ of the rootstock S ₁ and the hogi S ₂ are brought into contact with each other. It is, are held by inserting the connectors 80 to the ostium of the seedling holding plate 150 from the stock S ₁ side. Thereby, the joint surface S ₃ of the grafted seedling Sg is located in the thickness of the seedling holding plate 150. Note that the diameter of the small hole of the seedling holding plate 150 is substantially equal to the diameter of the connector 80.
For grafted seedlings Sg, rootstock S ₁ immediately after bonding because water supply capacity is weak, by immersing the bonding surfaces S ₃ to curing water Wa, while absorbing water and nutrients from the junction surface S _3, the bonding surface S It is necessary to make ₃ come alive.

Therefore, in Embodiment 2, the seedling holding plate 150 is formed in a size slightly smaller than the inner region of the heat conductive container 40, and the seedling holding plate 150 holding a plurality of grafted seedlings Sg is formed in the heat conductive container 40. It is placed on the surface of the curing water Wa inside. As a result, the curing water Wa rises through the gap between the connector 80 and the rootstock S ₁ to the joining surface S ₃ by capillary action, so that the grafted seedling Sg is immersed in the curing water Wa at a portion below the joining surface S _3. It is cured in the state. The frame-like heat insulating lid 160 is placed on the outer peripheral wall 22 of the irrigation tray 20 and the outer peripheral wall of the heat conductive container 40. The heat-insulating lid 160 may be composed of one sheet, but may be composed of a plurality of sheets corresponding to each heat conductive container 40.
Also in this case, as described in the first embodiment, the curing water Wa is heated to a predetermined temperature (for example, about 15 to 35 ° C.) and the atmospheric temperature is adjusted to about 0 to 20 ° C. Therefore, the bonding surface S ₃ Is promoted and growth of seedlings is suppressed.

(Other embodiments)
1. In the first and second embodiments, the case where the same kind of seedling is cured by the seedling raising apparatus is illustrated, but different kinds of seedlings may be cured in the irrigation tray of each stage. Further, different types of seedlings may be cured in a plurality of thermally conductive containers even in the same stage of irrigation tray. In this case, the curing water according to the kind of seedling can be used. If it does in this way, it can respond to the small amount multi-variety production of a seedling.
2. When using the seedling holding plate 50 larger than the opening of the heat conductive container 40 as in the first embodiment, the outer peripheral wall 22 of the irrigation tray 20 and the outer periphery of the heat conductive container 40 installed in the irrigation tray 20 are used. By matching the heights of the walls, the heat insulating lid 60 may be omitted, and the seedling holding plate 50 may cover the outer peripheral wall of the irrigation tray 20 and the outer peripheral wall of the heat conductive container 40.
3. In the first and second embodiments, the case where the support protrusions 26 are formed on the inclined surface portion 21 a of the irrigation tray 20 is illustrated, but linear concave grooves may be formed at the positions of the support protrusions 26. In this case, it is preferable to form a groove extending from the position of the sprinkling pipe 33 to the weir 25 so that the temperature-controlled water flows smoothly into each groove. Further, a groove is also formed at a position along the dam portion 25 of the inclined surface portion 21a, and this groove is connected to a recessed groove extending in the gradient direction of the inclined surface portion 21a, so that water is supplied to the recessed groove when the irrigation tray 20 is drained. There is no residue.
4). In the first and second embodiments, the case where the temperature adjustment water tank 30 is installed in the lowermost storage chamber 15 of the multistage shelf 10 is illustrated, but the temperature adjustment water tank 30 is buried under the floor, and the lowermost storage chamber 15 is provided. You may install the irrigation tray 20, the heat conductive container 40, etc., and may utilize as a curing space.
5). When the atmospheric temperature in the storage chamber R is adjusted to, for example, 0 to 20 ° C., condensed water is collected by the air conditioner. Since this condensed water is due to transpiration from seedlings, or the temperature-controlled water and curing water are evaporated, the condensed water generated in the air conditioner (indoor unit 2) is returned to the temperature-controlled water tank 30 and evaporated. You may comprise so that a reduced part may be replenished.
6). In the first and second embodiments, the case where the bottom surface portion on which the thermally conductive container is installed in the irrigation tray 20 is the inclined surface portion 21a is exemplified. However, the bottom surface portion may not be inclined and may be a horizontal plane parallel to the bottom wall lower surface.

It is a schematic block diagram which shows the seedling raising system provided with the seedling raising apparatus of Embodiment 1 of this invention. 1 is a front cross-sectional view illustrating a schematic configuration of a seedling raising apparatus according to Embodiment 1. FIG. It is a figure which shows the state by which the heat conductive container was installed on the irrigation tray in Embodiment 1, Comprising: Fig.3 (a) is a front sectional view, FIG.3 (b) is a right sectional view. It is the perspective view which looked at the irrigation tray in Embodiment 1 from the front side. It is a perspective view which shows the state which installs the seedling holding plate in this invention on a heat conductive container. It is a figure which shows the state by which the heat conductive container was installed on the irrigation tray in Embodiment 2, Comprising: Fig.6 (a) is a right sectional view, FIG.6 (b) is an expanded sectional view of a seedling holding plate. is there.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Seedling device 10 Multistage shelf 11 Side plate 12 Top plate 13 Shelf plate 20 Irrigation tray 21a Inclined surface part 24 Drainage port 25 Weir part 26 Support protrusion 30 Temperature control water circulation supply means 31 Temperature control water tank 32 Temperature control part 33 Water sprinkling pipe 34 Water supply pipe 35 Circulating Pipe 36 Pump 37 Flow Control Valve 40 Thermal Conductive Container 50, 150 Seedling Holding Plate 51 Small Hole 60, 160 Thermal Insulation Cover 71 Light Source 72 Fan R Storage Room Sc Cutting Plant Seedling (Seedling)
Sg grafted seedlings (young seedlings)
Wa Curing water Wt Temperature control water

Claims (12)

  An irrigation tray having a drain outlet, and a temperature-controlled water circulation supply means for collecting the temperature-controlled water in the irrigation tray having a water supply section for supplying temperature-controlled water at a predetermined temperature to the irrigation tray and discharged from the drain outlet; A plurality of thermally conductive containers installed on an irrigation tray to which temperature-controlled water is circulated, and a plurality of seedlings in a state where the open ends are immersed in curing water stored in the thermally conductive containers A seedling raising apparatus comprising: a seedling holding plate that is vertically held, and configured to cure seedlings by adjusting the temperature of the curing water for each heat conductive container by temperature-controlled water flowing in the irrigation tray.   The seedling raising apparatus according to claim 1, further comprising a multi-stage shelf for arranging a plurality of the irrigation trays and arranging the plurality of irrigation trays in a plurality of stages. The temperature adjustment water circulation supply means includes a temperature adjustment water tank, a temperature adjustment unit for adjusting the temperature of the temperature adjustment water in the temperature adjustment water tank to a predetermined temperature, the water supply unit, a drain outlet of the irrigation tray, and a temperature adjustment. A circulation pipe connecting the water tank,
The water supply unit is a watering pipe installed in an irrigation tray, a water supply pipe connecting the temperature control water tank and the water spray pipe, a pump for sending temperature control water in the temperature control water tank to the water supply pipe, The seedling raising apparatus of Claim 1 or 2 which has a flow volume adjustment valve provided in the vicinity of the said watering pipe in a water supply pipe.   The seedling raising apparatus as described in any one of Claims 1-3 further provided with the temperature detection part which detects the temperature of the temperature control water in the said irrigation tray, or the temperature of the curing water in the said heat conductive container.   The seedling apparatus according to any one of claims 1 to 4, wherein the irrigation tray has a plurality of support protrusions that support the thermally conductive container on a bottom surface. The irrigation tray has a weir on one end side of the bottom surface,
The seedling raising device according to any one of claims 1 to 5, wherein the drain port is disposed between an outer peripheral edge of an irrigation tray and the weir portion. The irrigation tray has an inclined surface portion inclined at an upward gradient from the one end side of the bottom surface toward the other end side on the opposite side,
The seedling raising device according to claim 6, wherein the dam part has a cut part in a part thereof.   The seedling raising device according to claim 7, wherein the support protrusion is a ridge that extends along an inclination direction of the inclined surface portion and increases in height as the inclined surface portion is inclined downward. The irrigation tray is made of a heat insulating material,
The seedling holding plate has a shape and size that can be placed on the heat conductive container or on the surface of the curing water in the heat conductive container, and has a plurality of small holes for inserting the open ends of the seedlings. The seedling raising apparatus according to any one of claims 1 to 8, comprising a sex plate.   The seedling raising apparatus as described in any one of Claims 1-9 further equipped with the heat insulation cover which covers between the outer periphery of the said irrigation tray, and the heat conductive container installed on the irrigation tray. The multi-stage shelf includes a frame, a top plate attached to the frame, and a plurality of upper and lower shelf boards,
The seedling raising apparatus according to any one of claims 2 to 10, further comprising a light source that is disposed on a lower surface of the top plate and a lower surface of the shelf board and irradiates the young seedlings with light.   The seedling raising system provided with the storage room provided with the air conditioner which can control room temperature, and the seedling raising apparatus as described in any one of the said Claims 1-11 installed in this storage room.

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