JP2019030261A - Raising seedling system and floating material - Google Patents

Abstract

To provide a system for raising seedling which can eliminate watering, and which hardly causes a growth difference between portions of a raising seedling box, and performs raising seedling by organic cultivation, a floating material used for the system and a method.SOLUTION: A raising seedling system 1 comprises: a pool 2 in which water is accumulated; a float 3 which is provided to support a raising seedling box 4 in a state of floating on the pool 2, and whose buoyancy is adjusted so that a bottom face 42 of the raising seedling box 4 is immersed; collection means 5 for collecting the water in the pool 2; an aeration tank 6 into which the collected water is put; a device 7 for supplying oxygen to the water in the aeration tank 6; a water feeding pipe 8 for feeding water in the aeration tank 6 to the pool 2. The float 3 comprises: an outer periphery mount part 35 on which an outer peripheral part of the bottom face 42 of the raising seedling box 4 is mounted; a side wall part 31 provided to surround whole periphery of the side surfaces of the raising seedling box 4; and an opening 36 formed in the outer periphery mount part 35 so as to penetrate to a lower face. To the aeration tank 6, an organic material and microbes for decomposing the organic material are added.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a system and method for raising seedlings by organic cultivation.

  There is a proposal of a method for raising a paddy rice seedling box on a foamed polystyrene board and floating the seedling box in a pool so that only the bottom surface is submerged by the weight of the seedling box (see Non-Patent Document 1). This method has the advantage that irrigation is unnecessary.

“Float cultivation method”, [online], May 9, 2017, Hiroshima Prefecture, [Search July 25, 2017], Internet <URL: http://www.pref.hiroshima.lg.jp/ soshiki / 30 / ukiraku.html>

  By the way, when raising seedlings by organic cultivation, it is necessary to refrain from using pesticides (insect repellents, herbicides, etc.) in organic cultivation, so grow seedlings that are large enough not to lose to weeds at the stage of the seedling box. There is a need to. However, when the method of Non-Patent Document 1 is applied to organic cultivation, there is a problem that in the process of growing a large seedling, there is a difference in the growth of the seedling between the outer peripheral side and the center side of the seedling box. Specifically, there is a problem that the growth of seedlings is inferior to the center side compared to the outer periphery side of the seedling box.

  The present invention has been made in view of the above-mentioned problems, can eliminate the need for irrigation, and can make it difficult to produce a difference in growth between the parts of the seedling box. It is an object to provide a material and a method.

  In the method of Non-Patent Document 1, the present inventor is that the roots of seedlings are entangled with the foamed polystyrene plate and the roots are entangled with each other, and the water containing nutrients is centered in the nursery box by sticking to the foamed polystyrene plate. It was considered that the growth on the center side was inferior to that on the outer peripheral side due to difficulty in reaching the side, and the present invention was completed.

That is, the seedling raising system of the present invention is
A cultivation tank in which water can be placed;
In a state of floating in the water of the cultivation tank, the buoyancy is provided so as to support a seedling box containing a medium in which the seed of the plant to be cultivated is put, and the bottom surface of the seedling box is immersed in the water of the cultivation tank With the adjusted floating material,
A hole is formed in the bottom of the nursery box,
The float is formed in a shape that opens the bottom of the nursery box to the water in the cultivation tank,
It is characterized by raising seedlings using organic materials as fertilizer.

  According to the present invention, irrigation can be dispensed with because the seedling box is floated in a cultivation tank filled with water with the bottom surface immersed. Moreover, since the bottom surface of the seedling box is open to water, the water containing nutrients can easily reach the center side of the seedling box. Thereby, it can be made hard to produce a growth difference between the parts of a seedling box.

In addition, the floating material of the present invention is
It is a floating material that is provided so as to support a seedling box containing a medium in which the seed of the plant to be cultivated is seeded, and whose buoyancy is adjusted so that the bottom surface of the seedling box is immersed in water. And
A hole is formed in the bottom of the nursery box,
It is formed in the shape which exposes the bottom face of the seedling box.

  The effect similar to the said seedling raising system is acquired by floating a seedling box on water using the floating material of this invention, and raising seedling.

  In addition, the seedling raising method of the present invention comprises a seedling box having a hole formed on the bottom surface and containing a medium in which the seed of the plant to be cultivated is seeded, wherein the bottom surface of the seedling box is opened to water, and the bottom surface is water. It floats on water so that it is soaked in water and grows seedlings using organic materials as fertilizer. According to this, the effect similar to the said seedling raising system is acquired.

It is the figure which showed the whole structure of the seedling raising system. It is the figure which showed the structure of the pool. It is a perspective view of a float. It is the side view which looked at the float from the A direction of FIG. It is the side view which looked at the float from the B direction of FIG. It is the top view which looked at the float from the C direction of FIG. It is a perspective view of a seedling box. It is the side view which looked at the seedling box from the A direction of FIG. It is the side view which looked at the seedling box from the B direction of FIG. It is the top view which looked at the seedling box from the C direction of FIG. It is the figure which showed the seedling raising system of the comparative example.

  Embodiments of the present invention will be described below with reference to the drawings. A seedling raising system 1 shown in FIG. 1 includes a pool 2 in which water is put and a float 3 (floating material) for floating a rice seedling raising box 4 in the pool 2. The pool 2 includes a frame 21 and a sheet 22 as shown in FIG. The frame 21 is a member constituting the side wall of the pool 2 and is provided so as to stand on the ground 400. The frame 21 is provided so as to surround an area of a predetermined size when viewed from above. The shape when the frame 21 is viewed from above can be a rectangle, for example, but may be a shape other than a rectangle. The predetermined size is determined so that a predetermined number of floats 3 can be placed in the area within the frame 21. The frame 21 may be a metal, a resin, or wood.

  The sheet 22 is formed of a material that is flexible and impermeable to water (for example, polyethylene). The sheet 22 is provided on the entire upper end of the frame 21 so as to cover the ground 400 in the frame 21 through the inner peripheral surface of the frame 21 from the upper end. The pool 2 corresponds to the cultivation tank of the present invention.

  The float 3 is formed of a material that can float on water even by the gravity of the seedling box 4, and specifically, XPS (Extruded Polystyrene) (so-called Styrofoam (registered trademark)), EPS (Expanded). (Polystyrene, polystyrene foam bead method). In this embodiment, all the parts of the float 3 are formed of the foam material, but a part of the float 3 may be formed of a material (resin or the like) other than the foam material.

  As shown in FIGS. 3-6, the float 3 is formed so that the three square frames 31-33 may be laminated | stacked. The frames 31 to 33 are integrated by being fixed with an adhesive, a tape, or the like. The outer shapes of the frames 31 to 33 in plan view (the outer shape when viewed from the direction C in FIG. 3) are the same as each other, and specifically, are rectangular as shown in FIG. The frame bodies 31 to 33 are stacked so that the outlines coincide with each other when viewed in the direction of FIG. By laminating the frames 31 to 33, the float 3 has a shape like a floating ring as a whole.

  Each frame 31 to 33 is formed in a rectangular shape having a short side in the height direction and a long side in the horizontal direction when viewed from the direction of FIG. 4 (direction A of FIG. 3). . Each frame 31 to 33 is formed in a rectangular shape having a short side in the height direction and a long side in the horizontal direction when viewed from the direction in FIG. 5 (the B direction in FIG. 3). . The heights d3, d4, and d5 (see FIGS. 4 and 5) of the frames 31 to 33 may be set to the same value or different values. In the present embodiment, the heights d3, d4, and d5 are set to the same value.

  Moreover, each frame 31-33 is formed in the shape of a frame seeing from the direction of FIG. 6 (C direction of FIG. 3). That is, the frame bodies 31 to 33 are formed with rectangular openings 34, 36, and 38 that penetrate from the front surface to the back surface, forming an inner peripheral line parallel to the rectangular outer peripheral line (also in FIG. 1). reference). The first frame 31 located on one surface side of the float 3 has an opening 34 formed so that the width between the outer peripheral line and the inner peripheral line is the same (uniform) at any position along the circumferential direction. Has been. That is, the widths d7 and d8 of the two portions extending in the long side direction and the widths d9 and d10 of the two portions extending in the short side direction of the first frame 31 are set to the same value.

  The opening 34 of the first frame 31 is set to a value that is equal to or slightly larger than the size of the nursery box 4. That is, the width (d13 + d14 + d15) (see FIG. 6) in the long side direction of the opening 34 is set to a value that is equal to or slightly larger than the width d17 (see FIG. 10) in the long side direction of the seedling box 4. The width (d11 + d12 + d16) (see FIG. 6) of the opening 34 in the short side direction is set to a value that is equal to or slightly larger than the width d18 (see FIG. 10) of the seedling box 4 in the short side direction.

  The second frame 32 positioned in the middle is also formed with an opening 36 so that the width between the outer peripheral line and the inner peripheral line is the same (uniform) at any position in the circumferential direction. That is, as shown in FIG. 6, the width (d7 + d11) and (d8 + d12) of the two parts extending in the long side direction and the width (d9 + d13) of the two parts extending in the short side direction of the second frame 32. , (D10 + d14) are set to the same value.

  The opening 36 of the second frame 32 is set to a value that is smaller than the opening 34 of the first frame 31 and slightly smaller than the size of the seedling box 4. That is, the width d15 (see FIG. 6) in the long side direction of the opening 36 is smaller than the width (d13 + d14 + d15) in the long side direction of the opening 34 and the width d17 in the long side direction of the seedling box 4 (see FIG. 10). It is set to a slightly smaller value. The width d16 (see FIG. 6) in the short side direction of the opening 36 is smaller than the width (d11 + d12 + d16) in the short side direction of the opening 34 and slightly smaller than the width d18 in the short side direction of the seedling box 4 (see FIG. 10). Is set to a value.

  Further, the opening 38 (see FIG. 1) of the third frame 33 located on the other surface side of the float 3 is formed in the same shape and the same size as the opening 34 of the first frame 31. That is, the width of the two portions extending in the long side direction and the width of the two portions extending in the short side direction of the third frame 33 are set to the same value, and the first frame 31 The widths d7, d8, d9, and d10 are set to the same value.

  Since the opening 36 of the second frame 32 is smaller than the opening 34 of the first frame 31, a part 35 of the upper surface of the second frame 32 is formed inside the opening 34 as shown in FIG. Exposed. This portion 35 is a portion on which the outer peripheral portion of the bottom surface of the seedling box 4 is placed, and is hereinafter referred to as an outer periphery placing portion. The outer periphery mounting portion 35 is formed in a shape having a rectangular outer peripheral line and an inner peripheral line (that is, a frame shape). Moreover, the outer periphery mounting part 35 is formed in the shape from which the width | variety between an outer peripheral line and an inner peripheral line becomes the same (uniform) in any position of the circumferential direction. That is, the widths d11 and d12 (see FIG. 6) of the two portions 353 and 354 extending in the long side direction and the widths d13 and d14 of the two portions 351 and 352 extending in the short side direction of the outer periphery mounting portion 35 are They are set to the same value.

  A recess 37 (see FIGS. 1 and 3) for placing the seedling raising box 4 is formed on the upper surface of the float 3 by the opening 34 and the outer periphery placing portion 35 of the first frame 31. A side surface of the concave portion 37 is an inner peripheral surface of the opening 34, and a bottom portion of the concave portion 37 is an outer peripheral placement portion 35. The opening 36 is located inside the outer periphery mounting portion 35.

  The opening 38 (see FIG. 1) of the third frame 33 is formed in the same shape and the same size as the opening 34 of the first frame 31, so that the opening 34 and the outer periphery are also placed on the lower surface of the float 3. A recess having the same shape as the recess 37 formed by the portion 35 is formed. Hereinafter, the opening 38 may be referred to as a recess.

  The float 3 is floated on the water of the pool 2 so that one of the recesses 37 and 38 formed on both surfaces faces upward and the other faces downward (water of the pool 2). That is, the float 3 is provided so as to fluctuate in the height direction in conjunction with the water level change of the pool 2. In other words, the float 3 is provided such that the positional relationship between the upper end of the float 3 and the water surface of the pool 2 is constant regardless of the water level of the pool 2. FIG. 1 shows an example in which the float 3 is provided so that the concave portion 37 faces upward and the concave portion 38 faces downward.

  As shown in FIG. 1, a seedling box 4 containing a medium (soil) seeded with rice seeds is placed in the recess 37. At this time, the bottom surface 42 of the seedling box 4 (in other words, the bottom of the culture medium) is immersed in the water of the pool 2, and the upper end of the seedling box 4 (in other words, the upper surface of the culture medium) is not immersed in water, that is, The buoyancy of the float 3 is adjusted so that the bottom of the seedling box 4 is submerged to the middle position between the bottom 42 and the upper end. That is, the widths d1 to d16 (FIGS. 4 to 6) of each part of the float 3 are set so that desired buoyancy can be obtained in a state where the seedling box 4 is placed in addition to the size of the seedling box 4. . For example, d1 = 700 mm, d2 = 75 mm, d3 = d4 = d5 = 25 mm, d6 = 400 mm, d7 = d8 = d9 = d10 = 40 mm, d11 = d12 = d13 = d14 = 40 mm, d15 = 540 mm, d16 = 240 mm can do. In addition, the float 3 is formed so that the same buoyancy as when using the flat plate-like float similar to the said nonpatent literature 1 is obtained. Thus, the float 3 supports the seedling raising box 4 in a form of being submerged in the water of the pool 2. The float 3 and the seedling box 4 are provided as separate bodies and are not integrated. The float 3 corresponds to the floating material of the present invention.

  As shown in FIGS. 7 to 10, the nursery box 4 has a side wall 41 and a bottom surface 42. The side wall portion 41 is formed in a rectangular frame shape when viewed in a plan view of FIG. 10 (viewed from the direction C of FIG. 7). That is, the side wall 41 is connected to the two linear long sides 411 facing each other and the ends of the long sides 411, and extends linearly in a direction perpendicular to the long sides 411. Two short sides 412 facing each other. The long side portion 411 is formed in an elongated rectangular shape when viewed from the direction of FIG. 8 (A direction of FIG. 7). The short side portion 412 is formed in an elongated rectangular shape when viewed from the direction of FIG. 9 (the B direction of FIG. 7). The bottom surface 42 is connected to the lower end of the side wall portion 41 and is provided so as to close the lower side of the space surrounded by the side wall portion 41. In addition, a large number of holes 43 are formed on the bottom surface 42 in a dot pattern. These holes 43 are formed over the entire bottom surface 42. The material of the seedling box 4 can be made of plastic, for example.

  The seedling box 4 is formed in a shape that matches the standard of the rice planting machine so that it can be installed in the rice planting machine. That is, the widths d17 to d25 (see FIGS. 8 to 10) of each part of the seedling box 4 are set to values that meet the standards of the rice planting machine. Specifically, for example, d17 = 600 mm, d18 = 300 mm, d19 = 30 mm, d20 = d21 = d22 = d23 = 10 mm, d24 = 580 mm, and d25 = 280 mm.

  Returning to the explanation of FIG. 1, the seedling raising system 1 further supplies a recovery means 5 for recovering the water in the pool 2, an aeration tank 6 for containing the water recovered by the recovery means 5, and supplying oxygen to the water in the aeration tank 6. An oxygen supply device 7 for supplying the water, and water supply means 8 for sending water from the aeration tank 6 to the pool 2.

  The recovery means 5 has a pump 51 that sucks up water in the pool 2 and a recovery pipe 52 that sends the water sucked up by the pump 51 to the aeration tank 6. In the example of FIG. 1, the pump 51 is provided so that the pool 2 is immersed, but may be provided outside the pool 2. The recovery pipe 52 is formed in a tubular shape with a flexible material, and one end is connected to the pump 51 and the other end is connected to the aeration tank 6. Further, the water suction position by the pump 51 is set to a position close to the end of the pool 2, for example. Note that the float 3 and the seedling box 4 are kept floating in the water of the pool 2 even when the pump 51 is sucking up water.

  The aeration tank 6 is a tank that is provided near the pool 2 and performs processing (aeration and fertilizer addition) for improving the water collected by the collection means 5. The aeration tank 6 corresponds to the processing tank of the present invention.

  The oxygen supply device 7 is a device that performs a process of sending oxygen (air) into the water of the aeration tank 6, that is, aeration (also referred to as aeration). The oxygen supply device 7 has a main body 71 for sending oxygen, and a pipe 72 provided with one end connected to the main body 71 and the other end immersed in the water of the aeration tank 6. The oxygen supply device 7 sends oxygen from the main body 71 into the water of the aeration tank 6 through the pipe 72. The oxygen supply device 7 corresponds to the oxygen supply means of the present invention.

  The water supply means 8 is configured as a water supply pipe that connects the aeration tank 6 and the pool 2. The water supply pipe 8 is formed in a tubular shape with a flexible material. One end of the water supply pipe 8 is connected to the aeration tank 6 so as to be electrically connected to the internal water, and the other end is provided so as to be immersed in the water of the pool 2. At this time, the water supply pipe 8 is provided so as to send water to the side opposite to the installation position of the collection means 5 in the pool 2 (the position where the pump 51 sucks up water). That is, the end of the water pipe 8 connected to the pool 2 is provided at a position closer to the end on the opposite side of the end of the pool 2 on the side where the collecting means 5 is installed.

  Further, the water supply pipe 8 is provided so that the water in the aeration tank 6 is automatically sent to the pool 2 by the water pressure in the aeration tank 6 (that is, without using a pump). Specifically, the connecting portion 61 between the water supply pipe 8 and the aeration tank 6 is located at a position where the water pressure at which the water in the aeration tank 6 is automatically sent to the pool 2 is obtained and higher than the upper end of the pool 2. Provided. According to this, even if it does not provide a pump, the water of the aeration tank 6 can be automatically sent to the pool 2 by the water pressure and gravity of the aeration tank 6. The amount of water supplied per unit time to the pool 2 by the water pipe 8 is set to be approximately the same as the amount of water recovered per unit time by the recovery means 5.

  The above is the configuration of the seedling raising system 1. Next, a method for growing seedlings by organic cultivation using the seedling raising system 1 will be described.

  Pool 2 (frame 21 and sheet 22) is installed at a desired location, and water is put into pool 2. In addition, the seedling box 4 is decomposed into organic materials (animal and plant materials (compost, chicken manure, cow dung, fish meal, bone meal, oil cake, etc.)) and organic materials as fertilizers that can be absorbed by the plant ( Put a medium (soil) for paddy rice containing microorganisms (to be mineralized) as floor soil. Rice seeds are planted on the floor soil. Then, cover the soil. The amount of the medium to be placed in the seedling box 4 can be, for example, an amount that reaches the upper end of the seedling box 4, but may be an amount that does not reach the upper end.

  The floats 3 are prepared for the number of the seedling boxes 4, and the seedling boxes 4 containing the culture medium are placed in the recesses 37 of the floats 3. Each float 3 on which the seedling box 4 is placed is floated on the water in the pool 2. In addition, the timing which installs the seedling box 4 in the pool 2 may be the timing before sowing after sowing, or may be the timing after germination. When the seedling box 4 is installed in the pool 2 after germination, the seedling box 4 is placed in a room adjusted to an environment suitable for germination and grows up to germination in this room.

  After the seedling box 4 is installed in the pool 2, the pump 51 and the oxygen supply device 7 are operated to collect water from the pool 2, supplying oxygen to the water collected in the aeration tank 6, and containing oxygen. Return water to Pool 2. That is, the water of the pool 2 is circulated through the path of the pool 2 → the aeration tank 6 → the pool 2. At this time, the amount of water sucked up by the pump 51 and the amount of water supplied by the water supply pipe 8 are set so that the water in the pool 2 is replaced with the water after aeration, for example, a predetermined number of times a day (for example, once or twice). The

  Moreover, the organic material and the microorganisms which decompose | disassemble so that it may be mineralized are added to the water of the aeration tank 6 at a predetermined timing. When organic materials and microorganisms are added to the aeration tank 6, it is preferable to stop water supply from the aeration tank 6 to the pool 2 for a certain period of time after the addition in order to proceed with decomposition. According to this, water can be sent to the pool 2 after mineralizing the organic material in the aeration tank 6, and the occurrence of rot odor due to the organic material in the pool 2 can be suppressed. As a method of stopping water supply from the aeration tank 6 to the pool 2, for example, the pump 51 may be stopped, or a manual opening / closing part for opening / closing the flow path of the water supply pipe 8 is provided and the opening / closing part is manually closed. Anyway. In addition, before putting in the aeration tank 6, an organic material may be decomposed | disassembled with microorganisms beforehand and the fertilizer after decomposition | disassembly may be added to the aeration tank 6.

  Further, when the water in the pool 2 is reduced by evaporation, new water is added to the aeration tank 6 as appropriate.

  Raising seedlings in Pool 2 is done without using chemical fertilizers and pesticides. No irrigation is performed.

  The seedling raising in the pool 2 ends when the seedling grows up to a predetermined height. In raising seedlings using chemical fertilizers and pesticides, the seedlings are grown until the seedling height is 10 cm to 15 cm and then transplanted to paddy fields. In the case of organic cultivation, the paddy fields are grown after growing to a height of 10 cm to 15 cm or more. It is preferable to transplant it. When the seedling grows up to a desired height, the seedling box 4 is removed from the float 3 and the removed seedling box 4 is set in a rice planting machine. And with this rice planting machine, the seedling in the seedling raising box 4 is transplanted to the paddy field. After transplanting to paddy field, grow rice by organic cultivation.

  Hereinafter, the effect of this embodiment will be described. In this embodiment, since the seedling box 4 is floated on the pool 2 and the seedling is raised, irrigation can be eliminated.

  Further, the float 3 is formed with an opening 36 that exposes (opens to the water of the pool 2) the bottom surface (all parts other than the outer periphery) of the seedling box 4, so that it is formed on the bottom surface 42 of the seedling box 4. The seedling root 100 (see FIG. 1) extending through the hole 43 extends into the water without being blocked by the float 3. Thereby, the nutrient contained in water can be easily absorbed by the seedling on both the center side and the outer peripheral side of the seedling box 4. Therefore, as shown in FIG. 1, it can suppress that a growth difference arises between the seedling 101 of the center side of the seedling raising box 4 and the seedling 102 of the outer peripheral side. Since the difference in growth between the parts of the seedling box 4 can be suppressed, it can be grown in the pool 2 until the height of the seedling becomes higher (that is, long-term cultivation is possible). Thereby, in the organic cultivation which refrains from the use of agricultural chemicals, it is possible to grow seedlings that are tall enough to lose to weeds in the pool 2.

  Moreover, it can suppress that the seedling root 100 adheres to the float 3. As a result, the seedling box 4 can be easily detached from the float 3.

  In addition, since the float 3 is provided with a side wall portion (the first frame 31 in the example of FIG. 1) that surrounds the entire circumference of the side surface of the seedling box 4, the seedling box 4 is placed horizontally on the float 3. It can suppress that it moves, and can suppress that the seedling box 4 falls from the float 3. Further, by providing the side wall 31 on the float 3, it is possible to easily obtain the same buoyancy as when the flat float of Non-Patent Document 1 is used while exposing the bottom surface 42 of the seedling box 4. Further, the buoyancy of the float 3 can be easily adjusted by changing the height of the side wall 31.

  Moreover, since the seedling box 4 is supported by the outer periphery mounting part 35 of the float 3, the entire periphery of the outer peripheral part is supported, so that the seedling box 4 can be prevented from being bent by the weight of the culture medium. Moreover, the buoyancy from the float 3 can be made to act uniformly with respect to the seedling raising box 4, and it can be easy to support the seedling raising box 4 horizontally (it can suppress that the seedling raising box 4 inclines).

  In addition, the horizontal width of the part (the first frame 31, the second frame 32, and the third frame 33) surrounding the openings 34, 35, and 38 (see FIG. 1) of the float 3 (see FIG. 1). 6 d7 to d14) are set to the same value. That is, the widths d11 to d14 (see FIG. 6) of the outer periphery mounting portion 35 have the same value, and the widths d7 to d10 (see FIG. 6) of the first frame 31 in plan view have the same value. In addition, the width (not shown) of the third frame 33 in plan view is also the same value. Thereby, the buoyancy from the float 3 can be made to act uniformly with respect to the seedling box 4, and it can be made easy to support the seedling box 4 horizontally (it can suppress that the seedling box 4 inclines).

  Moreover, since the concave portions 37 and 38 (see FIG. 1) matching the size of the seedling box 4 are formed on both surfaces of the float 3, the seedling box 4 is placed on the float 3 regardless of the surface. be able to. That is, since it is not necessary to distinguish the upper surface and the lower surface of the float 3, handling of the float 3 is facilitated.

  In addition, since the float 3 and the seedling box 4 are configured separately, the seedling box 4 can be floated in the pool 2 just by placing the seedling box 4 on the float 3. It can be easily set on a rice planting machine.

  In addition, the water in the pool 2 is circulated so as to return to the pool 2 after aeration and additional fertilization in the aeration tank 6, so that deficiency of nutrients necessary for raising seedlings can be suppressed, and organic materials by microorganisms can be prevented by aeration. Degradation can be promoted. In other words, it is possible to suppress the stagnation of decomposition of the organic material by microorganisms due to lack of oxygen. As a result, it is possible to suppress the generation of rot odor and insects due to the stagnation of the decomposition of the organic material. Moreover, it can be made easy to make a seedling absorb the nutrient contained in water because the water of the pool 2 flows.

  Moreover, it can suppress that the water of the pool 2 ripples by performing aeration outside the pool 2 (aeration tank 6). Further, by performing additional fertilization outside the pool 2 (aeration tank 6), nutrients can be supplied to the pool 2 after organic materials are decomposed to some extent by microorganisms, and the occurrence of rot odor in the pool 2 can be suppressed.

  Moreover, since the water supply from the aeration tank 6 to the pool 2 is performed using natural force (water pressure and gravity of the aeration tank 6) without using a pump, the configuration of the water supply means 8 can be simplified.

  In addition, since the water suction position by the pump 51 and the water supply position by the water supply pipe 8 in the pool 2 are located on the opposite sides, it is possible to easily make the water flow in the entire pool 2. As a result, when a plurality of seedling boxes 4 are floated on the pool 2, nutrients that have flowed uniformly can be supplied to the seedling boxes 4. Moreover, it can suppress that the new water sent from the water pipe 8 is sucked up with the pump 51 immediately.

  Moreover, since the pool 2 is comprised from the frame 21 and the sheet | seat 22, the pool 2 can be installed without leveling.

  Here, FIG. 11 shows a seedling raising system of a comparative example. In the seedling raising system of FIG. 11, the seedling box 4 is placed in the form of semi-immersed on a flat float 200 similar to the float of Non-Patent Document 1, and aeration and circulation are performed on the water in the pool 2. The point which is not performed and the point which is performing topdressing directly to the pool 2 differ from the said embodiment. In the configuration of FIG. 11, the roots of the seedlings are blocked by the float 200, and the growth of the seedlings 301 on the center side is inferior to the seedlings 302 on the outer peripheral side of the seedling box 4. That is, a difference in growth occurs between the parts of the seedling box 4, which is not suitable for long-term cultivation. Moreover, since aeration is not performed, even if organic materials and microorganisms are added to the water of the pool 2, decomposition of the organic materials by the microorganisms stagnate due to lack of oxygen, resulting in a spoiled odor.

  In addition, this invention is not limited to the said embodiment, A various change is possible to the limit which does not deviate from description of a claim. For example, in the above-described embodiment, an example in which the float 3 is provided with the outer periphery placing portion 35 that supports the entire periphery of the outer periphery of the seedling box 4 is described, but the outer periphery that supports a part of the outer periphery of the seedling box 4 A placement unit may be provided. Specifically, in FIG. 6, for example, two long side portions 353 and 354 facing each other are removed from the outer periphery placing portion 35, and the outer periphery of the seedling box 4 is formed by two short side portions 351 and 352 facing each other. You may make it support the short side part of a part. Further, in FIG. 6, the two short side portions 351 and 352 facing each other out of the outer periphery placing portion 35 are eliminated, and the two long side portions 353 and 354 facing each other are the long side portions of the outer peripheral portion of the seedling raising box 4. May be supported.

  Moreover, in the said embodiment, although the laminated body of the 1st-3rd frame 31-33 was illustrated as the float 3, it should just be provided with the shape similar to the 2nd frame 32 at least. That is, the first and third frames 31 and 33 may be omitted, and the float may be configured only with the same shape as the second frame 32, or the first frame 31 may be omitted and the second frame 32 may be omitted. The float may be configured only in the same shape as the third frames 32 and 33, or the third frame 33 may be omitted and only the same shape as the first and second frames 31 and 32 is used. A float may be configured. In this case, the thickness of the float may be adjusted so that the same buoyancy as when all of the first to third frames 31 to 33 are provided.

  Moreover, in the said embodiment, although natural force (water pressure, gravity) was utilized for water supply from the aeration tank 6 to the pool 2, you may perform the water supply with a pump.

  Moreover, in the said embodiment, although the water was supplied from the pool 2 to the aeration tank 6 with the pump 51, you may perform the water supply using natural force (water pressure, gravity).

  Moreover, in the said embodiment, although the float 3 was comprised by laminating | stacking the three frame bodies 31-33, you may comprise the float of the shape similar to the float 3 by cutting. Moreover, although the said embodiment demonstrated the example which supports one seedling box per one float, you may comprise a float so that a plurality of seedling boxes may be supported by one float.

  Further, the present invention may be applied to raising seedlings of edible plants other than paddy rice (for example, leafy vegetables that can be hydroponically cultivated).

1 Seedling system 2 Pool (cultivation tank)
3 Float (floating material)
4 Nursery box 51 Pump (collection means)
6 Aeration tank (treatment tank)
7 Oxygen supply device (oxygen supply means)
8 water pipe (water supply means)

The float 3 is floated on the water of the pool 2 so that one of the recesses 37 and 38 formed on both surfaces faces upward and the other faces downward (water of the pool 2). That is, the float 3 is provided so as to fluctuate in the height direction in conjunction with the water level change of the pool 2. In other words, the float 3 is provided so that the positional relationship between the upper end of the float 3 and the water surface of the pool 2 is constant regardless of the water level of the pool 2. FIG. 1 shows an example in which the float 3 is provided so that the concave portion 37 faces upward and the concave portion 38 faces downward.

The present invention relates to a system for raising seedlings by organic cultivation and a floating material .

The present invention has been made in view of the above-described problems, can eliminate the need for irrigation, and can make it difficult to produce a difference in growth between the parts of the seedling box, and a system for raising seedlings by organic cultivation and a float used in the system. The problem is to provide materials .

That is, the seedling raising system of the present invention is
A cultivation tank in which water can be placed;
In a state where it floats in the water of the cultivation tank, it is provided to support a seedling box containing soil seeded with a plant to be cultivated, and the buoyancy so that the bottom surface of the seedling box is immersed in the water of the cultivation tank With the adjusted floating material,
A hole is formed in the bottom of the nursery box,
The floating material is formed with a recess capable of arranging the seedling box on both surfaces facing in the vertical direction,
The bottom portion of the recess has an outer periphery placement portion on which the entire outer periphery of the bottom surface of the seedling box is placed, and an opening through which the entire area inside the outer periphery placement portion penetrates to the recess on the opposite side. And
The side wall of the recess is provided so as to surround the entire circumference of the side surface of the seedling box,
It is characterized by raising seedlings using organic materials as fertilizer.

In addition, the floating material of the present invention is
It is a floating material that is provided so as to support a seedling box filled with soil in which the seeds of the plant to be cultivated are seeded, and whose buoyancy is adjusted so that the bottom surface of the seedling box is immersed in water. And
A hole is formed in the bottom of the nursery box,
The floating material is formed with a recess capable of arranging the seedling box on both surfaces facing in the vertical direction,
The bottom portion of the recess has an outer periphery placement portion on which the entire outer periphery of the bottom surface of the seedling box is placed, and an opening through which the entire area inside the outer periphery placement portion penetrates to the recess on the opposite side. And
The side wall part of the said recessed part was provided so that the perimeter of the side surface of the said seedling box might be surrounded .

Claims (19)

A cultivation tank in which water can be placed;
In a state of floating in the water of the cultivation tank, the buoyancy is provided so as to support a seedling box containing a medium in which the seed of the plant to be cultivated is put, and the bottom surface of the seedling box is immersed in the water of the cultivation tank With the adjusted floating material,
A hole is formed in the bottom of the nursery box,
The float is formed in a shape that opens the bottom of the nursery box to the water in the cultivation tank,
A seedling system characterized by raising seedlings using organic materials as fertilizer.   The said floating material is provided with the outer periphery mounting part in which the outer peripheral part of the bottom face of the said seedling box is mounted, The opening penetrated to the lower surface is formed inside the outer periphery mounting part, It is characterized by the above-mentioned. The seedling raising system of 1.   The seedling raising system according to claim 2, wherein the outer periphery mounting part is provided so that the entire periphery of the outer peripheral part is mounted.   The seedling raising system according to claim 2 or 3, wherein the floating material is provided with a side wall part that surrounds the entire circumference of the side surface of the seedling box. A collecting means for collecting the water in the cultivation tank;
A treatment tank for containing the water collected by the collecting means;
Oxygen supply means for supplying oxygen to the water in the treatment tank;
The seedling raising system of any one of Claims 1-4 provided with the water-feeding means which sends the water of the said processing tank to the said cultivation tank.   The seedling system according to claim 5, wherein an organic material and a microorganism that decomposes the organic material into a form that can be absorbed by a plant are added to the treatment tank.   The said collection | recovery means is equipped with the collection pipe | tube which connects the said cultivation tank and the said processing tank, and the pump which sends the water of the said cultivation tank to the said processing tank through the collection pipe | tube. The nursery system described. The water supply means includes a water supply pipe connecting the treatment tank and the cultivation tank,
The seedling system according to any one of claims 5 to 7, wherein the water pipe is provided so that water is sent from the treatment tank to the cultivation tank by a water pressure of the treatment tank.   The seedling raising system according to any one of claims 5 to 8, wherein the water supply means is provided so as to send water of the treatment tank to the opposite side of the cultivation tank from the installation position of the recovery means. .   The seedling system according to any one of claims 1 to 9, wherein the plant to be cultivated is paddy rice. It is a floating material that is provided so as to support a seedling box containing a medium in which the seed of the plant to be cultivated is seeded, and whose buoyancy is adjusted so that the bottom surface of the seedling box is immersed in water. And
A hole is formed in the bottom of the nursery box,
A floater formed in a shape that exposes the bottom surface of the nursery box.   The float according to claim 11, further comprising an outer periphery mounting portion on which an outer peripheral portion of the bottom surface of the seedling box is mounted, and an opening penetrating to the lower surface is formed inside the outer periphery mounting portion. Wood.   The floating material according to claim 12, wherein the outer periphery mounting portion is provided so that an entire periphery of the outer periphery is mounted.   The floating material according to claim 12 or 13, further comprising a side wall portion surrounding the entire circumference of the side surface of the seedling box.   The floating material according to any one of claims 11 to 14, wherein the plant to be cultivated is paddy rice.   A seedling box containing a medium in which a seed of a plant to be cultivated is sown with a hole formed on the bottom surface is floated in water so that the bottom surface of the seedling box is open to water and the bottom surface is immersed in water, Raising seedlings using organic materials as fertilizers. The nursery box is floated in the water of the cultivation tank,
The seedling raising method according to claim 16, wherein water in the cultivation tank is collected, oxygen is supplied to the collected water, and then returned to the cultivation tank.   The seedling raising method according to claim 17, wherein topdressing is performed on the collected water.   The seedling raising method according to any one of claims 16 to 18, wherein the plant to be cultivated is paddy rice.

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