JP7154520B2 - plant cultivation equipment - Google Patents

Description

The present invention relates to a plant cultivation apparatus that can be used for cultivating vegetables, fruits, flowers, and other plants, for example, in a greenhouse such as a vinyl house or in an open field.

Conventionally, when cultivating plants such as vegetables, fruits, and flowers, for example, a cultivation bed (cultivation bed) provided by loading a culture medium on the upper surface of a sheet supported by being bent in a U shape is used. A method of cultivating plants while controlling plants or their culture medium, water, fertilizer, etc. is known (see, for example, Patent Document 1). Further, for example, in order to reduce labor during work, there is also known an elevated cultivation bed apparatus in which a culture medium is installed at a higher level than the ground. In a conventional elevated cultivation bed apparatus, a medium sheet is bent downward between two horizontal arms that are placed above the ground and supported together with the medium loaded on the upper surface of the arms, and a gap is formed between the medium sheets. The liquid-receiving sheet is supported between the arms by bending downward from the culture medium sheet. In addition, the present inventors have proposed, in Patent Document 1, an elevated cultivation bed apparatus capable of providing cultivation beds continuously in the width direction and efficiently forming an effective cultivation area. The elevated cultivation bed device of Patent Document 1 is an elevated cultivation bed device in which a culture medium sheet and a liquid receiving sheet are bent and supported in two layers with a gap between the two horizontal arms as described above. , a plurality of vertical pipes arranged in a row in a direction orthogonal to the longitudinal direction of the horizontal arm and vertically supported from the ground side; is provided and supported in a state of being bent in two layers, an additional U-shaped arm part of which is fitted into one of the horizontal pipes and the other part is inserted and fitted into the vertical pipe, and an additional U-shaped arm and an additional horizontal arm that is integrally connected to the additional U-shaped arm on the side where the arm is inserted into the vertical pipe.

Japanese Patent No. 5827539

The conventional cultivation bed in which the upper surface of the sheet bent in a U shape as described above is loaded with a medium and supported by the sheet is lightweight, thin and flexible. There is an advantage that the cultivation bed can be manufactured relatively easily and at low cost. On the other hand, in conventional cultivation beds, the temperature of the culture medium is easily affected by the outside air and the temperature environment inside the greenhouse. There is a risk of interference. In addition, in order to maintain the temperature of the culture medium, for example, a heating device is used to heat the indoor temperature of the greenhouse, or hot water heated by a boiler is circulated through pipes to heat the culture medium. However, there is a problem that running costs such as fuel costs and equipment costs are relatively high.

The present invention has been made in view of the above-mentioned conventional problems, and one of its purposes is to cultivate plants that are not easily affected by the temperature of the cultivation space, can relatively easily manage the temperature of the culture medium, and can cultivate plants well. It is to provide a device.

In order to solve the above problems, the present invention provides a support means 12 and a waterproof sheet 14 supported on the ground by the support means 12 in a long rectangular shape in plan view, wherein the gap between both long sides of the sheet is downward. A water stop sheet 14 that hangs down in a concave shape and at least a part of which hangs down is buried in the ground UG, and a medium sheet that is supported on the ground in a long rectangular shape in plan view by a support means 12 and has a medium 18 mounted on the upper surface side. , the gap between both long sides of the sheet hangs downward in a concave shape, and at least a part of the hanging down is buried in the ground UG to form a gap 46 between the water cutoff sheet 14 and the water cutoff sheet 14 above. A communication path 48 that connects the gap space 46 between the medium sheet 16 on the underground UG side and the water stop sheet 14 to the ground side space RM is provided with a plant cultivation device.

In this case, the support means 12 has a sheet end support device for supporting both longitudinal ends of the culture medium sheet 16 or the water stop sheet 14, and the sheet end support device supports the water stop sheet at both ends in the longitudinal direction. 14, a water stop sheet support 26 that supports the end 14E of the medium sheet 14, a medium sheet support 28 that supports the end 16E of the culture medium sheet 16 with a gap inward from the water stop sheet support 26 in plan view, , and a communication passage 48 may be formed to connect the gap space 46 between the water stop sheet 14 and the culture medium sheet 16 to the space on the ground side .

According to the plant cultivating apparatus of the present invention, the support means and the waterproof sheet supported on the ground by the support means in a long rectangular shape in a plan view, the gap between both long sides of the sheet hang down in a concave shape. A water stop sheet having at least a hanging part buried in the ground, and a culture medium sheet supported on the ground in a rectangular shape having a long plane view by a support means, and having a culture medium mounted on the upper surface side thereof, wherein both long sides of the sheet A culture medium sheet placed at a position shifted upward in parallel from the water stop sheet so that the gap hangs down in a concave shape and at least a part of the hanging is buried in the ground to form a gap between the water stop sheet and the water stop sheet. , Even with a structure that supports the culture medium with a sheet, the culture medium is buried in the ground with relatively little temperature change, so it is less likely to be affected by the temperature of the cultivation space such as a greenhouse. It is possible to prevent growth failures due to temperature changes such as sudden temperature drops, and to cultivate plants satisfactorily.

In addition, the medium sheet is supported by the support means at a position where both long sides project from the ground so that part of the mounted culture medium protrudes from the ground. is exposed on the ground side, cultivation management including water supply is easy, and plants can be cultivated satisfactorily.

In addition, even in a structure in which at least a part of the water stop sheet and the culture medium sheet is buried in the ground, even if the water stop sheet and the culture medium sheet are buried in the ground, The water can be drained smoothly, the water content of the culture medium can be reliably controlled, and the plants can be cultivated satisfactorily.

In addition, the drainage means includes a drainage port portion provided by perforating the water stop sheet, a drainage pipe buried in the ground below the water stop sheet and connected to the drainage port portion, and the water drainage. By adopting a structure having an opening or an opening/closing valve interposed in the drain channel of the drain pipe, the drain means can be realized with a specific structure at low cost. In addition, by opening and closing the open/close valve as necessary, it is possible to switch between the state of draining water from the water stop sheet and the state of storing water, thereby facilitating moisture management of the culture medium. In addition, for example, when using a plant-derived medium such as coconut husk, when the medium is newly installed or replaced, the medium is soaked in water in the device to remove harshness. etc. can also be done easily.

In addition, a plurality of sets of the support means, the water stop sheet and the medium sheet are arranged side by side on the ground, and the drainage means has a common drain pipe for collecting the drainage from each water stop sheet. Cultivation can be managed by securing a cultivation area, and waste water can be efficiently treated from the culture medium.

In addition, by configuring the gap space between the culture medium sheet on the underground side and the water cutoff sheet with a communication passage that communicates with the above-ground space, for example, hot air and cold air can be supplied through the communication passage. The addition of the medium can also assist the temperature control of the culture medium, which can improve practicality.

In addition, the support means is a sheet end supporting device for supporting both ends in the longitudinal direction of the medium sheet or the water stop sheet, and the longitudinal direction of the downward bending space formed by the medium sheet or the water stop sheet. By adopting a structure having a sheet end support device that supports the ends in a flexed state so as to close them, it is possible to concretely close both longitudinal ends of the culture medium sheet and the water stop sheet that are long on one side with a simple structure. can be realized.

In addition, the sheet end supporting device includes a water-stopping sheet support that supports the ends of the water-stopping sheet at both ends in the longitudinal direction, and a medium sheet that is spaced inward from the water-stopping sheet support in a plan view. and a medium sheet support for supporting the end portion, and a communication path is formed to connect the gap space between the water stop sheet and the medium sheet to the ground side space, thereby simplifying the structure. can form the interstitial space between the water stop sheet and the medium sheet.

BRIEF DESCRIPTION OF THE DRAWINGS It is isometric view explanatory drawing which carried out the cross section of a part of plant cultivation apparatus which concerns on the 1st Embodiment of this invention, and showed it. FIG. 2 is a partially omitted plan view of the plant cultivation apparatus of FIG. 1; FIG. 2 is a cross-sectional view of the plant cultivation apparatus of FIG. 1 taken along the line AA. FIG. 2 is a cross-sectional view of the plant cultivation apparatus of FIG. 1 taken along the line BB. It is explanatory drawing of the state which arranged the support means of the plant cultivation apparatus of FIG. 1, a culture-medium sheet, and a water stop sheet side by side. It is an explanatory view showing a part of the support means of the plant cultivation apparatus of FIG. It is an explanatory view showing a part of the support means of the plant cultivation apparatus of FIG.

EMBODIMENT OF THE INVENTION Embodiment of the plant cultivation apparatus of this invention is described below, referring an accompanying drawing. The plant cultivation apparatus according to the present invention is, for example, a cultivation bed apparatus or cultivation bed apparatus for plants capable of cultivating vegetables such as cucumbers, tomatoes, and paprika, leafy vegetables such as spinach, fruits, flowers, and various other plants. be. 1 to 10 show one embodiment of the plant cultivation device of the present invention. As shown in FIGS. 1, 2, and 3, the plant cultivation apparatus 10 according to the present embodiment includes a support means 12, a waterproof sheet 14 supported by the support means 12, and a waterproof sheet 14 supported by the support means 12 on the upper surface. and a medium sheet 16 on which a medium 18 is mounted. In the present embodiment, the plant cultivation apparatus 10 will be described for cultivating plants in a greenhouse such as a vinyl house VH, for example.

The support means 12 is support means for supporting the water stop sheet 14 and the medium sheet 16 . As shown in FIGS. 1, 2, and 3, in the present embodiment, the support means 12 includes, for example, a frame member 20 assembled in a long rectangular shape in a plan view, and supports 22 that support the frame member 20 above the ground. and a sheet supporter (24, 26, 28). As also shown in FIG. 6, the frame member 20 includes, for example, two long-side arms 30 arranged parallel to each other with their longitudinal directions horizontal, and two long-side arms 30 at both ends of the long-side arms 30. two first short-side arms 32 arranged horizontally at right angles to each other, and the first short-side arms 32 separated from each of the first short-side arms 32 inside the frame member 20 with a predetermined gap. It is provided in combination with two second short-side arms 34 arranged in parallel. The long-side arm 30, the first short-side arm 32, and the second short-side arm 34 are made of, for example, a hard material such as metal, and are made of a square bar or square pipe having a rectangular cross section. The long-side arm 30 is provided with a length of, for example, about 50 m, and is supported from below by a plurality of supports 22 at a plurality of locations in the longitudinal direction. The first short-side arm 32 and the second short-side arm 34 are provided with a length of, for example, about 40 cm. Both outer surfaces of the fitting portion 32a are provided with holes for bolt penetration. The fitting portion 32a, which is substantially U-shaped downward, is formed so as to correspond to the cross-sectional outline of the long-side arm 30 made of a square bar or the like. The first short-side arm 32 and the second short-side arm 34 are fixed via bolts 35 by fitting the fitting portion 32 a to the long-side arm 30 . That is, in the present embodiment, the frame member 20 is provided with an inner frame size of approximately 50 m × 40 cm in plan view, and a water stop sheet 14 and a culture medium sheet formed long on one side as described later. 16 and medium 18 are installed to form one cultivation plot. The post 22 includes, for example, a pile portion 36 that is elongated vertically and fixed by sticking into the ground, and a substantially U-shaped receiving piece portion 38 that is fixed to the upper end of the pile portion 36 and has an upper opening. have. The pile portion 36 has an upper portion protruding from the ground GL. The receiving piece 38, which is substantially U-shaped upward, is formed corresponding to the cross-sectional outline of the long-side arm 30 and engages the long-side arm 30 in a fitted manner. is drilled with holes for bolt penetration. For example, a plurality of struts 22 are arranged along the longitudinal direction of the long-side arm 30 at intervals of about 1 to 1.5 m, and the long-side arm 30 is fitted in a substantially U-shaped receiving piece portion 38 . The long-side arm 30 is supported by being received in and fixed via bolts 39 . The strut 22 horizontally supports the long-side arm 30 at a position about 10 cm above the ground GL, for example.

The sheet supports are fixed to the upper surface side of the long-side arm 30 and fixed to the upper surface side of the first short-side sheet 32. and a water stop sheet end support 28 fixed to the upper surface side of the second short side sheet 34 . As shown in FIG. 7, each of the sheet supports 24, 26, and 28 is composed of, for example, a conventionally known sheet fastener for fastening a vinyl sheet or the like. and a resilient pincer member 44 inserted within 42 . The stay member 42 is elongated in one direction along the longitudinal direction of the arm, and has an insertion opening opened upward between the opposed receiving pieces 40 . The elastic pinching member 44 is, for example, an elastic spring formed by bending a metal wire into alternately inverted trapezoidal shapes. locked to. The long side or short side end of the water stop sheet 14 or the culture medium sheet 16 is inserted into the insertion port of the stay member 42, and the resilient pinching member 44 is mounted between the opposed receiving pieces 40 from above. The water sheet 14 or the medium sheet 16 is sandwiched and locked. In the sheet long side support member 24, the long side end of the water stop sheet 24 is inserted into the stay member 42, and one elastic clip member 44 is inserted to lock and support the water stop sheet 14. The long side end of the culture medium sheet 16 is inserted into the same stay member 42 from above the water cutoff sheet 14, and another resilient pinching member 44 is inserted to lock and support the culture medium sheet 16. As shown in FIG. In the water stop sheet end support 26, as will be described later, both ends of the water stop sheet 14 in the longitudinal direction are inserted into the stay members 42, and the long side ends of the water stop sheet 24 are inserted into one resilient pinching member. 44 is inserted to lock and support the waterproof sheet 14 . Similarly, in the culture medium sheet end support 26, both ends in the longitudinal direction of the culture medium sheet 14 are inserted into the stay members 42, and the long side ends of the water stop sheet 24 are inserted into one spring clip. A member 44 is inserted to lock and support the media sheet 16 . That is, the support means 12 includes a water-stopping sheet support that supports the end of the water-stopping sheet 14 and a medium sheet support that supports the end of the medium sheet 16 with a gap from the water-stopping sheet support. a sheet edge support device having a

The water stop sheet 14 is a so-called waterproof sheet, and is a sheet body that receives, collects and drains moisture (liquid) flowing down through the medium sheet 16 . As shown in FIGS. 1, 2 and 3, the waterproof sheet 14 is supported on the ground in a long rectangular shape in a plan view by the support means 12, and the central portion in the short side direction is bent downward to A gap formed by bending between both long sides of the water sheet is installed in a downwardly suspended state in a concave shape. At the same time, the waterproof sheet 14 is provided such that at least a hanging portion thereof is buried below the ground UG, that is, the ground GL. In this embodiment, the waterproof sheet 14 is made of, for example, a water-impermeable material such as vinyl resin, and is made of a flexible waterproof sheet having a strip shape (long rectangular shape) that is long on one side. The water stop sheet 14 is, for example, bent in a substantially U shape and hung down in a concave groove formed by excavating the ground with a tending machine or the like to have a U shape in cross section. It is supported by the sheet long side support member 24 of the support means 12 described above. In this embodiment, for example, the bottom end of the U-shape of the waterproof sheet 14 is set at a depth of about 25 cm from the ground GL, and protrudes upward from the ground GL by about 10 cm. Both ends of the waterproof sheet 14 in the longitudinal direction, that is, the short side ends 14E, are bent upward so as to close the ends of the U-shaped space at the ends of the long side arms 30. It is raised and supported by the waterproof sheet end supports 26 of the support means 12 on the ground side.

The culture medium sheet 16 is a medium supporting sheet placed above the water cutoff sheet so as to form a gap space 46 with the water cutoff sheet 14, and having the culture medium 18 mounted on the upper surface side. As shown in FIGS. 1, 2, and 3, the culture medium sheet 16 is supported on the ground by the support means 12 in a long rectangular shape in a plan view, and the central portion in the short side direction is bent downward to allow the culture medium sheet to extend downward. A gap formed by bending between both long sides is installed in a state of hanging downward in a concave shape. At the same time, the culture medium sheet 16 has both long sides so that at least part of the culture medium sheet 16 that hangs down is buried below the ground UG side, i. is supported by support means 12 at a position protruding from the ground. In the present embodiment, the culture medium sheet 16 is, for example, a flexible sheet made of nonwoven fabric or woven fabric, which is permeable to water and air but has meshes that can block the passage of plant roots, earth and sand, etc., a so-called root barrier. It consists of a sheet or an impermeable root sheet, and is formed in a long belt shape (oblong rectangular shape) on one side. The culture medium sheet 16 is bent in a substantially U-shape so as to be installed in a U-shaped gap of the water-shutoff sheet 14 that bends in a substantially U-shape so that the water-shutoff sheet 14 is moved upward in parallel. In addition, a gap space 46 having a substantially crescent shape in cross section and a long gap 46 along the longitudinal direction of the sheet is formed between the U-shaped downward projecting side and the waterproof sheet 14, and the ends that will be both long sides are placed on the ground. It is supported at the same time as the waterproof sheet 14 by the sheet long side supports 24 of the support means 12 described above. In this embodiment, for example, the bottom end of the U-shape of the culture medium sheet 16 is set at a depth of about 15 cm from the ground GL, and protrudes upward from the ground GL by about 10 cm. Therefore, the gap space 46 between the medium sheet 16 and the water stop sheet 14 is a gap of about 10 cm between the U-shaped lower ends of those sheets. The culture medium 18 mounted on the upper surface of the culture medium sheet 16 is also arranged so that about 10 cm of the upper side protrudes from the ground GL. Both ends of the medium sheet 16 in the longitudinal direction, that is, the short side ends 16E, are bent upward at positions near the ends of the long side arms 30 so as to close the ends of the U-shaped medium mounting space. The medium sheet end supports 28 of the support means 12 support on the ground side.

As shown in FIGS. 2 and 5, both long sides of the sheet are doubled while forming the gap space 46 between the water stop sheet 14 and the culture medium sheet 16 as described above. It is supported by the sheet long side support 24 . The short-side ends 14E of the water-stopping sheet 14 arranged on the lower side are the ends of the water-stopping sheets fixed to the first short-side arms 32 arranged at the ends of the frame member 20. The short side end 14E of the culture medium sheet 16 that is supported by the part support 26 and arranged on the upper side is the medium sheet end that is fixed to the second short side arm 34 that is arranged slightly inside the frame member 20. It is supported by the part support 26 . Therefore, between the rising short side end portion 14E of the water stop sheet 14 and the rising short side end portion 16E of the culture medium sheet 16, a communicating passage 48 is formed which opens 49 on the upper surface side and communicates in the vertical direction. . The communication path 48 communicates the gap space 46 between the above-described underground UG side waterproof sheet 14 and the culture medium sheet 16 with the ground side space RM. For example, the temperature of the culture medium 18 may be controlled by blowing heated air, cold air, or the like through the communication path 48 as necessary. Also, the opening on the upper surface side of the communicating path 48 may be provided with a cover member, a sheet, or the like so as to be openable and closable. In addition, the communication path 48 is not limited to the above structure, and for example, a structure in which one end of the pipe is exposed to the ground-side space RM and the other end is communicated with the interstitial space 46 between the water stop sheet 16 and the culture medium sheet 16. , or any other communication configuration.

In the present embodiment, the culture medium 18 is, for example, a granule obtained by pulverizing coconut shells. Coconut husks have high air retention and drainage properties, low water content, and are less susceptible to disease than soil. and can be easily supported. The culture medium 18 is not limited to coconut husk, and may be, for example, crypt or peat moss made from the bark of cedar or cypress, or any other material corresponding to the plant to be cultivated. The culture medium 18 has a lower part buried in the ground UG than the upper and lower middle positions and an upper part protruding above the ground GL due to the support structure by the support means 12 and the medium sheet 16 as described above. be done. Although not shown, an irrigation device or the like for supplying water or water containing nutrients to the medium 18 or plants planted in the medium may be installed above the medium or near the medium.

One underground culture medium unit 50 is composed of the support means 12 , the water stop sheet 14 , the medium sheet 16 and the medium 18 described above. As shown in FIG. 5, in a greenhouse such as a vinyl house, a plurality of underground culture medium units 50 are arranged side by side in the direction of the short side of the frame member 40 at predetermined intervals. . For example, in the case of a double-building vinyl house VH, if four underground culture medium units 50 are installed side by side in each building, a total of eight underground culture medium units 50 are installed. Become. It may be installed in a single-building type or a plurality of continuous-building vinyl greenhouses , but if a large number of underground culture medium units 50 are arranged side by side in a large-sized vinyl greenhouse such as a continuous-building type, intensive cultivation management is possible.

Further, as shown in FIGS. 1, 4, and 5, a drainage means is provided for discharging the water received by the waterproof sheet 14 to the outside. In this embodiment, the drainage means 52 is configured to collect and drain the drainage from the water cut-off sheet 14 of each of the plurality of underground culture medium units 50 . Specifically, the drainage means 52 includes a drainage port portion 54 provided by perforating each water stop sheet 14, and a drainage port portion 54 buried in the ground UG below the water stop sheet 14. It has a drain pipe 56 connected in communication, an open/close valve 58 interposed in the drain channel of the drain pipe 56, and a common drain pipe 60 simultaneously communicating with the plurality of drain pipes 56. The drain port portion 54 is provided, for example, on the end portion side in the longitudinal direction of the waterproof sheet 14 . The drain port 54 has, for example, a circular through hole and a perforated joint member that is attached so as to reinforce the through hole. For example, one end of the drain pipe 56 is connected to the drain port portion 54, and the vertical pipe portion extends downward, and is L-shaped to a position that does not overlap the underground unit 50 in plan view. A horizontal pipe portion extends in the horizontal direction, and a vertical pipe portion extends downward from the end portion of the horizontal pipe portion by bending in an L shape. An opening/closing valve 58 is interposed in the middle of the drain pipe 56 to enable opening and closing of the drain channel. The opening/closing valve 58 is provided so as to be operable from the ground side. The common drain pipe 60 is buried in the underground UG at a position further below the drain pipe 56 . One end of the common drain pipe 60 is pulled out to an irrigation channel CH or the like outside the vinyl house VH to drain the collected water to the outside. In addition, the common drain pipe 60 may be provided so as to discharge water to a culvert or a collection tank installed in a vinyl house or the like.

Next, the operation of the plant cultivation device 10 according to this embodiment will be described. As described above, the culture medium sheet 16 is supported by the support means 12 so that a part of the culture medium sheet 16 is buried in the ground, and is supported downward in a concave shape. Since the culture medium 18 is installed in the ground where the temperature change is relatively small since a part of the culture medium 18 is also buried in the ground, the temperature change of the culture medium 18 is relatively small and the temperature can be controlled. In particular, even if the temperature suddenly drops at night in winter, etc., part of the culture medium 18 is placed underground, so the temperature of the culture medium can be prevented from dropping rapidly, and the temperature of the culture medium can be maintained satisfactorily. Plants can be grown while maintaining Furthermore, if necessary, heated air or cold air is sent to the interstitial space 46 between the underground water cutoff sheet 14 and the culture medium sheet 16 via the communication path 48 to assist temperature control of the culture medium 18. You can also When water is supplied to the culture medium 18 and plants by a water supply device (not shown), the water that has passed through the culture medium 18 permeates the medium sheet 16 and is received by the waterproof sheet 14 . The water received by the water cutoff sheet 14 is collected from the drain port 54 of the drain means 52 to the common drain pipe 60 through the drain pipe 56, and is drained to the outside of the vinyl house or the like. In this way, plants can be cultivated satisfactorily while simply and smoothly controlling the temperature and moisture of the culture medium.

The plant cultivation apparatus of the present invention described above is not limited to the configuration of the above-described embodiment only, and can be modified arbitrarily without departing from the essence of the present invention described in the claims. good.

The plant cultivation apparatus of the present invention can be suitably used for cultivating vegetables, fruits, flowers, and other plants, for example. Although it can be used for outdoor cultivation, it is particularly suitable for greenhouse cultivation such as a vinyl house.

REFERENCE SIGNS LIST 10 plant cultivation device 12 support means 14 water stop sheet 16 medium sheet 18 medium 24 sheet long side support 26 water stop sheet end support 28 medium sheet end support 46 gap space 48 communication path 52 drainage means 54 drain port 56 drain pipe 58 open/close valve 60 common drain pipe

Claims (2)

a support means;
A waterproof sheet supported on the ground in a long rectangular shape in plan view by a support means, wherein the gap between both long sides of the sheet hangs down in a concave shape, and at least a part of the hanging is buried in the ground. a seat;
A culture medium sheet that is supported on the ground in a rectangular shape in a plan view by a support means and that carries a culture medium on its upper surface side, wherein the gap between both long sides of the sheet hangs down in a concave shape, and at least a part of the hanging down is in the ground. a medium sheet installed at a position translated upward from the water stop sheet so as to form a gap between it and the water stop sheet ,
1. A plant cultivation apparatus, comprising : a communication passage that connects a gap space between a culture medium sheet and a water stop sheet on the underground side to a space on the ground side . The support means has a sheet end support device that supports both ends of the medium sheet or the water stop sheet in the longitudinal direction,
The sheet end support device includes water stop sheet supports that support ends of the water stop sheet at both ends in the longitudinal direction;
a medium sheet support that supports the end of the medium sheet with a gap inward from the water stop sheet support in a plan view,
2. The plant cultivating apparatus according to claim 1, wherein a communication path is formed to connect the gap space between the water stop sheet and the culture medium sheet to the ground space .

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