JP2016002036A - Seedling raising method, and transplanting method of pot seedlings - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve work efficiency before and after transplanting pot seedlings.SOLUTION: A seedling raising method of the present invention has: a seeding process of seeding in each of a plurality of two-dimensionally arrayed seedling chambers 11 in which a hole 111 is provided for each bottom part and filling soil by using a seedling box 1 having the seedling chambers 11; and a seedling raising process of raising pot seedlings in the state where the seedling box 1 is mounted on a seedling box installation part 2 having a flat top surface. Roots of seedlings raised in the seedling box 1 cannot grow downward from a top surface of the seedling box installation part 2. Thus, in the seedling raising process, roots extended from the inside of the seedling chamber 11 to a rear surface of the seedling box 1 via the hole 111 are entangled with roots of adjacent seedling chambers 11 to form a mat root part 10 covering the rear surface of the seedling box 1 in a mat state. As a result, a root-cutting work for removing root part extended to the rear surface of the seedling box 1 before transplanting pot seedlings is not required. Thus, work efficiency before and after transplanting the pot seedlings can be improved.

Description

  The present invention relates to a pot seedling raising method and a pot seedling transplanting method.

  2. Description of the Related Art Conventionally, as a seedling raising method for seedlings such as rice and vegetables, a so-called pot type seedling raising method is known in which seedlings are grown using a seedling box having a plurality of seedling rooms. The conventional pot-type seedling raising method is described in Patent Document 1, for example.

  FIG. 8 shows a conventional pot seedling raising method. (A) of FIG. 8 shows the state of the seedling of the pot seedling at the start of the seedling raising, and (b) shows the state of the pot seedling at the end of the seedling raising.

  The seedling box 8 has a hole at the bottom of the seedling room 81. When transplanting the pot seedling grown in the pot type seedling box 8 to the field, the pot seedling is taken out from the seedling box by inserting an extrusion rod into the hole provided at the bottom of each seedling chamber 81 from the back side. Therefore, as shown in FIG. 8, if the root portion extends from the hole to the back side of the seedling box 8, it becomes difficult to insert the push rod into the hole. Therefore, when the root portion extends on the back side of the seedling box 8, it is necessary to perform root cutting work using a net or the like for root cutting.

  In the seedling raising method of Patent Document 1, as shown in FIG. 8, pot seedlings are grown in a state where the root cutting net 9 is laid under the seedling box 8 so that the root cutting net 9 is in contact with the back surface of the seedling box 8. To do. If it does in this way, the root part extended to the back side of seedling box 8 will pass through root cutting net 9, and will extend to the lower soil. Thereby, when the seedling box 8 is peeled off from the soil before transplanting the pot seedling, the root portion extended to the back side of the seedling box 8 by the root cutting net 9 can be easily removed. Therefore, it is easy to take out the pot seedling from the seedling box at the time of transplantation.

JP 54-29705 A

  However, when the root cutting net 9 is used, the soil where the roots extend is essential, and the seedling raising place is limited. Further, it is necessary to lay the root cutting net 9 on the soil and to clean it up. For this reason, it is difficult to further improve the working efficiency.

  This invention is made | formed in view of such a situation, and it aims at providing the seedling raising method and the transplanting method which can improve the working efficiency before and behind transplanting a pot seedling.

  In order to solve the above-mentioned problem, the first invention of the present application is a seedling raising method using a seedling box having a plurality of seedling rooms arranged in a two-dimensional manner with holes provided at the bottoms thereof, and a) Seeding each of the seedling rooms of the seedling box and filling with soil, b) After the step a), the seedling box is placed on a seedling box installation part having a flat upper surface A seedling process for growing a pot seedling in a state where the seedling roots are grown in the seedling box cannot extend downward from the upper surface of the seedling box installation part, and the process b C) Roots extending from the seedling chamber through the hole to the back surface of the seedling box are entangled with the roots of the adjacent seedling chambers to form a mat root portion that covers the back surface of the seedling box in a mat shape. And a mat root forming step.

  2nd invention of this application is the seedling raising method of 1st invention, Comprising: The said seedling box installation part is a sheet-like, plate-shaped, or block-shaped member.

  3rd invention of this application is the seedling raising method of 1st invention or 2nd invention, Comprising: The said process b) has the said upper surface of the said seedling box installation part, and at least one part containing the said hole of the said seedling box. Performed in water.

  4th invention of this application is the transplanting method which transplants the pot seedling grown by the seedling raising method in any one of 1st invention thru | or 3rd invention to a field, d) With respect to the said seedling box which has the said mat root part A push rod is pushed into the hole from the back side of the mat root and the pot seedling is taken out from the seedling box; and e) the pot seedling taken out after the step d). In the step d), the mat root portion is formed with a through hole connected to the hole by passing through the push rod.

  5th invention of this application is the transplanting method of the pot seedling of 4th invention, Comprising: The said seedling box is arrange | positioned between the holding | grip part arrange | positioned at the width direction both ends, and the said holding | gripping part, and is substantially the width direction. A plurality of seedling chambers lined up at equal intervals, two nursery chamber blocks, and a flat boundary disposed between the two nursery chamber blocks; f) before step d) In addition, on the back surface of the boundary portion, the mat root portion formed on the back surface of the one nursery block and the mat portion formed on the back surface of the other nursery block are removed. The method further includes a step, and in the step d), the grip portion and the boundary portion are fixed.

  A sixth invention of the present application is a transplanting method for transplanting a plurality of pot seedlings accommodated in a seedling box having a plurality of seedling rooms arranged in a two-dimensional manner with holes provided in the bottoms thereof, d) A seedling removing step of pushing an extrusion rod into the hole from the back side of the mat root portion to the seedling box having the mat root portion, and taking out the pot seedling from the seedling box, and e) the step d ), And transplanting the pot seedling taken out to a field, and the mat root is a part of the roots of the pot seedlings accommodated in the seedling box, The root extending from the seedling chamber through the hole to the back surface of the seedling box and the root of the adjacent seedling chamber are entangled with each other, the mat-shaped portion covering the back surface of the seedling box, In step d), the push rod penetrates the mat root. By Rukoto through hole leading to the hole.

  According to the first to sixth inventions of the present application, it is not necessary to perform a root cutting operation for removing the root portion extending to the back side of the seedling box before transplanting the pot seedling. Thereby, the working efficiency before and after transplanting a pot seedling can be improved.

  In particular, according to the fourth to sixth inventions of the present application, in the seedling taking-out step, the pot seedling is taken out from the seedling box while the push rod penetrates the mat root. Thereby, the removal work of the root part extended on the back of the seedling box before and after transplanting the pot seedling is not required.

It is a top view of the seedling box for pot seedlings concerning one embodiment. It is the partial top view and partial longitudinal cross-sectional view of the seedling box which concern on one Embodiment. It is the figure which showed the mode of the seedling raising of the pot seedling which concerns on one Embodiment. It is the flowchart which showed the flow of the seedling raising method and transplant method which concern on one Embodiment. It is a side view of the transplanter concerning one embodiment. It is a perspective view of the transplant device concerning one embodiment. It is the figure which showed the mode of the pot seedling taking out in the transplanting method which concerns on one Embodiment. It is the figure which showed the mode of the seedling raising of the pot seedling in the conventional seedling raising method.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. In the present application, the opening side of each seedling room of the seedling box is referred to as “front”, and the bottom side in the direction opposite to the opening side is referred to as “back”. In the present application, the traveling direction of the transplanter is referred to as “forward direction”, and the direction opposite to the traveling direction of the transplanter is referred to as “rearward direction”. In the present application, the vertical direction is defined according to the posture when the transplanter is used. In FIG. 5 and FIG. 6, “F” is attached to the traveling direction of the transplanter, and “R” is attached to the direction opposite to the traveling direction of the transplanter.

<1. About raising seedlings in pots>
<1-1. Seedling box>
FIG. 1 is a top view of a seedling box 1 for pot seedlings according to an embodiment. FIG. 2 is a (a) partial top view and (b) partial longitudinal sectional view of the seedling box 1. In FIG. 1 and FIG. 2 (a), the seedling box 1 is arranged so that the front side is up.

  The seedling box 1 is a container for growing plant seedlings in each seedling room 11. The pot seedlings grown in the seedling box 1 may be paddy rice seedlings or vegetable seedlings such as white onions, onions and leaf vegetables. The seedling box 1 is formed of a flexible material that can be bent, such as synthetic rubber.

  As shown in FIG. 1, the seedling box 1 is formed in a substantially rectangular shape when viewed from the front side. In the seedling box 1, the longitudinal direction is referred to as the length direction, and the short direction is referred to as the width direction. As shown in FIG. 2, the seedling box 1 has a plurality of cup-shaped seedling rooms 11 that are recessed from the front side surface toward the back side. That is, the seedling room 11 has an opening on the front side and a bottom on the back side. The plurality of seedling rooms 11 are two-dimensionally arranged.

  After seeding and raising seedlings in the seedling room 11, the grown pot seedlings are placed in the seedling box 1 together with the seedling box 1, which will be described later, while being accommodated in the seedling box 1. And a pot seedling is taken out from the seedling box 1 with the transplanting apparatus 31, and is transplanted to a farm field.

  As shown in FIG. 2A, a bottom hole 111 is provided at each bottom of the seedling room 11. In the present embodiment, the bottom hole 111 has a Y-shape that extends in three directions from substantially the center of the bottom of the seedling chamber 11. At the time of transplanting the pot seedling, an extrusion bar 44 of the transplanting device 31 described later is inserted from the back side. Thereby, a pot seedling is taken out from the inside of the seedling room 11. The bottom hole 111 may be a simple circular through hole, or may be a cut such as a Y shape or a cross shape.

  As shown in FIG. 1, the seedling box 1 of the present embodiment includes a holding portion 12 disposed at both ends in the width direction, two seedling chamber blocks 13 in which a plurality of seedling chambers 11 are arranged in a grid pattern, and 2 And a boundary portion 14 disposed between the two nursery room blocks 13.

  The grip portion 12 is provided with a plurality of square holes 121 arranged in the length direction. At the time of transplanting the pot seedling, the seedling box 1 is transported by moving a claw portion (not shown) of a seedling box feeding section 42 of the transplanting device 31 described later while being inserted into the square hole 121.

  The two nursery room blocks 13 are arranged between the two gripping portions 12 with the boundary portion 14 interposed therebetween. In the nursery room block 13, a plurality of seedling rooms 11 are arranged at substantially equal intervals in the length direction and the width direction.

  As shown in FIG. 1, the boundary portion 14 is a belt-like portion extending in the length direction between the two nursery room blocks 13. Further, the boundary portion 14 is a flat portion as shown in FIG. At the time of transplanting the pot seedling, the front side and the back side of the boundary portion 14 are fixed around the push bar 44 of the transplant device 31. Thereby, it is suppressed that the seedling box 1 bends in the case of taking out a pot seedling.

<1-2. Seedling method>
Next, a procedure for growing pot seedlings will be described. FIG. 3 is a flowchart showing a flow of a pot seedling raising method and a transplanting method in the present embodiment. FIG. 4 is a diagram showing a state of raising a pot seedling. (A) of FIG. 4 has shown the mode of seedling raising of the pot seedling immediately after the seedling start. Moreover, (b) of FIG. 4 has shown the mode of the seedling raising of the pot seedling at the time of the seedling raising end.

  First, each seedling 11 in the seedling box 1 is seeded and filled with soil (step ST101, sowing step). Then, as shown in FIG. 4A, the seedling box 1 after sowing is placed on the float 2 floated on water in the pool (step ST102, seedling box installation step). In the present embodiment, the float 2 is a seedling box setting unit for mounting the seedling box 1 in the seedling raising process. The float 2 is a plate-like member that has a flat upper surface and floats on water. The float 2 is made of, for example, a material such as polystyrene foam.

  At this time, a float 2 having a buoyancy that allows the bottom of each seedling room 11 to be immersed in water and the upper surface of the seedling box 1 not to be immersed in water is selected. When the bottom of the seedling chamber 11 is immersed in water, at least a part of the seedling box 1 including the bottom hole 111 is immersed in water. Accordingly, water is always supplied from the bottom hole 111 into the seedling room 11.

  In the present embodiment, a seedling raising process described later is performed in a state where a part of the seedling box 1 including the bottom hole 111 is immersed in water. In such a so-called pool type seedling, since it is not necessary to frequently irrigate, water supply work during seedling can be reduced. Moreover, in pool type seedlings, since the bed soil is in water, the generation of pathogenic bacteria is suppressed. Furthermore, in pool-type seedlings, water is always supplied to all the seedling chambers 11, so that uneven growth of each pot seedling hardly occurs.

  In the seedling raising process, when the water surface is located above each seedling room 11 of the seedling box 1, rooting occurs between the seedling rooms 11 on the front side of the seedling box 1. In that case, at the time of transplanting the pot seedling, it is difficult to take out the pot seedling when taking out each pot seedling from the seedling box 1. Therefore, in the present embodiment, so-called pool type raft seedling raising in which the seedling box 1 is placed on the float 2 is performed. By placing the seedling box 1 on the float 2 having a constant buoyancy, the height of the water surface relative to the seedling box 1 can be kept substantially constant.

  Thereby, the height of the water surface can be kept lower than the surface on the front side of the seedling box 1, and the root crossing on the front side of the seedling box 1 can be suppressed. Moreover, since the water depth in the pool can be increased, the number of water supply operations during raising seedlings can be reduced.

  Next, pot seedlings are grown with the seedling box 1 placed on the float 2 (steps ST103 to 104, seedling raising step). The seedling raising process includes a first seedling raising process before roots extend on the back of the seedling box 1 and a second seedling raising process where roots extend on the back of the seedling box.

  In the first seedling raising step (step ST103), buds grow from seeds sown in each seedling chamber 11, leaves are formed, roots extend in the seedling chamber, and pot seedlings are grown. As the pot seedling grows, the root begins to extend from the seedling chamber 11 through the bottom hole 111 to the back side of the seedling box 1 and proceeds to the second seedling raising step (step ST104).

  In the second seedling raising step (step ST104), the leaves of each pot seedling further grow, and the roots extending to the back side of the seedling box 1 further extend. Here, the root of the pot seedling grown in the seedling box 1 cannot extend downward from the upper surface of the float 2. Therefore, the roots extending from each seedling chamber 11 to the back side of the seedling box 1 through the bottom hole 111 extend in the lateral direction between the back surface of the seedling box 1 and the float 2.

  Then, the roots are further extended with the growth of the pot seedlings, and the roots extending from the seedling chamber 11 to the back surface of the seedling box 1 through the bottom hole 111 are intertwined with the roots of the adjacent seedling chambers 11. Thereby, as shown in FIG.4 (b), the mat | matte root part 10 is formed. The mat root portion 10 is a part of the roots of a plurality of pot seedlings sown and grown in the seedling room 11, and is a mat-like portion that covers the back surface of the seedling box 1. Thus, a 2nd seedling raising process is a mat root part formation process.

  When the pot seedlings grown in each seedling room 11 have reached a leaf age suitable for transplanting to a field, the second seedling raising step (step ST104) is terminated. In the present embodiment, when the mat root 10 is formed by growing into a so-called adult seedling having a leaf age of 4.5 to 5.5 leaves and the roots of the adjacent nursery rooms 11 are entangled, Finish the seedling raising process.

  Thereafter, the pot seedlings grown by the seedling raising method of steps ST101 to ST104 are transplanted to the field using the transplanting method of steps ST105 to ST107. The transplanting method in steps ST105 to ST107 will be described later.

<2. About transplanting pot seedlings>
<2-1. Overall configuration of transplanter>
FIG. 5 is a side view of the pot seedling transplanter 3. FIG. 6 is a perspective view of the transplant device 31 mounted on the transplanter 3. The transplanter 3 is a device for transplanting a plurality of pot seedlings N (see FIG. 4B and FIG. 7) grown in a seedling box to a field such as a paddy field or a field. The pot seedlings N to be transplanted may be paddy rice seedlings or vegetable seedlings such as white onions, onions and leaf vegetables.

  As shown in FIG. 5, the transplanter 3 according to the present embodiment includes a traveling vehicle body 33 that is supported by the front and rear traveling wheels 32 so as to travel freely, and a transplant device 31 that is mounted on the traveling vehicle body 33. When the transplanter 3 is in operation, the transplanting device 31 takes out a plurality of pot seedlings N from the seedling box 1 while advancing the traveling vehicle body 33 by the traveling wheels 32 and sequentially transplants them to the field.

  The transplanter 3 of this embodiment is a four-row planting rice transplanter. The transplanting machine 3 has two transplanting devices 31 each having two planting parts 6 on the left and right, thereby transplanting four seedlings N of pot seedlings N at a time into the field.

  As shown in FIG. 6, the transplant device 31 includes a seedling extraction unit 4, a seedling transport unit 5, and a planting unit 6.

  The seedling extraction unit 4 is a part that extracts the pot seedling N from the seedling box 1 and delivers it to the seedling transport unit 5. As shown in FIG. 6, the seedling extraction unit 4 includes a seedling placement table 41, a seedling box feeding unit 42, a seedling box fixing unit 43, and a plurality of push rods 44.

  The seedling box 1 is placed on the seedling placing table 41. The seedling box feeding section 42 moves the holding section 12 of the seedling box 1 placed on the seedling placing table 41 in an obliquely downward direction that is the transport direction while holding the holding section 12. Specifically, the seedling box 1 is transported in the transport direction by moving a claw portion (not shown) of the seedling box feeding section 42 while being inserted into the square hole 121. Thereby, the seedling box 1 mounted on the seedling mounting table 41 is transported downward and slightly forward.

  The seedling box fixing part 43 is a part that presses the boundary part 14 of the seedling box 1 in the vicinity of the lower end part of the seedling mounting table 41. The seedling box fixing part 43 includes a first back side fixing part 431, a second back side fixing part 432, and a front side fixing part 433.

  The first back-side fixing part 431 is a part of the seedling mounting table 41 and protrudes from the other seedling box mounting surface of the seedling mounting table 41. The first back side fixing portion 431 extends along the conveyance direction of the seedling box 1. When the seedling box 1 is arranged on the seedling placement table 41, the first back side fixing part 431 is located between the boundary part 14 and the seedling room 11 adjacent in the width direction on the back side of the seedling box 1, that is, between the boundary part 14 Arranged on the back side.

  The second back side fixing portion 432 is disposed at a position overlapping the push bar 44 in the transport direction on the downstream side of the seedling mounting table 41. The second back side fixing portion 432 extends along the conveyance direction of the seedling box 1. When the seedling box 1 is conveyed downstream from the seedling mounting table 41, the second back side fixing portion 432 is disposed on the back side of the boundary portion.

  The front side fixing portion 433 is disposed at a position overlapping with a part of the downstream side of the first back side fixing portion 431 and the second back side fixing portion 432 in the transport direction. The front side fixing part 433 extends along the conveyance direction of the seedling box 1. When the seedling box 1 is placed on the seedling placement table 41 and conveyed downstream, the front side fixing portion 433 is arranged on the front side of the boundary portion 14.

  With this configuration, when the seedling box 1 is arranged in the vicinity of the lower end portion of the seedling placement table 41 and on the downstream side thereof, the boundary portion 14 includes the first back side fixing portion 431 or the second back side fixing portion 432, and the front side fixing portion 433. It is sandwiched between. As a result, when the seedling box 1 tries to bend toward the back side, the boundary portion 14 contacts the first back side fixing portion 431 or the second back side fixing portion 432. Therefore, it is suppressed that the seedling box 1 tries to bend toward the back side. Further, when the seedling box 1 tries to bend toward the front side, the boundary portion 14 comes into contact with the front side fixing portion 433. Thereby, it is suppressed that the seedling box 1 tries to bend toward the front side. Therefore, bending of the seedling box 1 in the vicinity of the push bar 44 is suppressed. As a result, the seedling chambers 11 of the seedling box 1 are arranged at positions suitable for taking out the pot seedling N in the vicinity of the push bar 44.

  The push-out bar 44 protrudes forward so that a predetermined number (14 in this example) of a row of pot seedlings N aligned in the width direction is forwarded from the seedling box 1 guided to a predetermined position by the seedling box feeding unit 42. Push out.

  The seedling conveyance unit 5 receives the pot seedling N pushed out from the seedling extraction unit 4, reverses the direction of the pot seedling N in the front-rear direction, and sends it out to the planting unit 6. The seedling transport unit 5 includes a seedling receiving platform 51 and a lateral feed belt 52.

  After receiving the pot seedling N taken out from the seedling box 1 by the push bar 44, the seedling receiving base 51 reverses the front / rear direction of the pot seedling N, and the root portion is directed forward on the lateral feed belt 52. Drop in a state. The transplant device 31 of the present embodiment has two lateral feed belts 52 on the left and right and two planting portions 6 on the left and right. The pot seedling N that has fallen on the right lateral feeding belt 52 is conveyed in the right direction and delivered to the right planting unit 6. On the other hand, the pot seedling N that has fallen on the left lateral feed belt 52 is conveyed leftward and delivered to the left planting unit 6.

  The planting part 6 has the guide board 61 and the planting nail | claw 62, as shown in FIG. The pot seedling N that has reached the downstream end of the lateral feed belt 52 in the seedling transport section 5 is conveyed downward along the guide plate 61 by the rotating planting claws 62 and planted in the field in an upright state.

<2-2. Transplantation method>
Subsequently, a procedure for transplanting the pot seedling N will be described. FIG. 7 is a view showing a state of taking out the pot seedling N in the present embodiment.

  In the seedling box 1 of the pot seedling N grown by the seedling raising method of steps ST101 to ST104, as shown in FIG. 4, on the back surface of the boundary portion 14, the mat root portion 10 formed on the back surface of one nursery room block 13, In some cases, a connecting portion 101 with the mat root portion 10 formed on the back surface of the other nursery block 13 is formed.

  When the seedling box 1 is mounted on the transplanting device 31 with the connection portion 101 remaining on the back surface of the seedling box 1, the first backside fixing is performed between the seedling chambers 11 adjacent to each other in the width direction of the boundary section 14 on the back side of the boundary section 14. The part 431 and the second back side fixing part 432 cannot be arranged. As a result, the seedling box 1 cannot be placed at an appropriate position for taking out the seedling by the push rod 44.

  Therefore, first, before the seedling box 1 is mounted on the transplanting device 31, the connection location 101 is removed (step ST105, removal step). At this time, the connection location 101 may be cut in the length direction with an operator's finger, or the connection location 101 may be cut in the length direction using a cutter such as a root cutting knife. In addition, when the connection location 101 is not formed in the back surface of the seedling box 1, a removal process (step ST105) can be skipped.

  Next, the seedling box 1 is mounted on the transplanting device 31, and the transplanting operation in the field is started. In the transplanting operation, the seedling box 1 is accommodated in the seedling box 1 by repeating the seedling extraction process (step ST106) for extracting the pot seedling N from the seedling box 1 and the transplanting process (step ST107) for transplanting the extracted pot seedling N to the field. A plurality of pot seedlings N thus transplanted are transplanted to the field.

  In the seedling removing step (step ST106), as shown in FIG. 7, the push rod 44 is pushed into the bottom hole 111 from the back side of the mat root 10. Then, the push bar 44 pushes the pot seedling N from the seedling box 1 to the front side while penetrating the mat root 10. As a result, the mat root 10 is formed with a through hole 102 through which the push bar 44 penetrates and is connected to the bottom surface hole 111. Further, the pot seedling N is taken out from the seedling box 1 by pushing the root part of the pot seedling N from the back side of the seedling box 1 to the front side by the push rod 44.

  In the mat root portion 10, the roots extending from the adjacent nurseries are firmly entangled with each other, so that when the push rod 44 is inserted into the bottom hole 111, the root around the portion where the push rod 44 contacts is the push rod 44. It is cut without being dragged by. Therefore, excessive roots are not dragged by the push rod 44 and pushed out to the front side of the seedling box.

  The pot seedling N taken out from the seedling box 1 is placed on the seedling receiving platform 51. As shown by an arrow in FIG. 7, the seedling receiving platform 51 rotates downward while gripping the pot seedling N, thereby reversing the front-rear direction of the pot seedling N and Let fall. And the pot seedling N is conveyed to the planting nail | claw 62 vicinity by the horizontal feed belt 52, and is planted in a farm field by the rotating planting claw 62 (step ST107, transplanting process).

  Thus, in this embodiment, the transplanting operation by the transplanting device 31 is performed in a state where the mat root portion 10 is present along the back surface of the seedling box 1. In the case of a pot seedling N grown by a conventional seedling raising method as shown in FIG. 8, the root extending to the back of the seedling box 1 forms a root extending in the direction from the front side to the back side. If such a root portion remains, the pot seedling N cannot be completely pushed out from the seedling box 1 by the extrusion rod 44, and the pot seedling N may not line up on the lateral feed belt 52. However, if the root portion is a mat-like mat root portion 10, the push rod 44 can be reliably cut by penetrating the mat root portion 10 from the back side to the front side.

  When the transplanting step (step ST107) is completed, the mat root 10 remaining on the back side of the seedling box 1 is peeled off naturally. Even when the mat root portion 10 is difficult to peel off, the mat root portion 10 can be removed by the operator gently stroking the back surface of the seedling box 1 by hand. Moreover, since the soil is not an indispensable condition like the conventional seedling raising method, a seedling raising place is not chosen.

  Therefore, according to the seedling raising method and the transplanting method of the present invention, the root cutting operation for removing the root extending to the back side of the seedling box before transplanting the pot seedling N is not required. Further, since no root cutting net is used, no removal work for removing the root from the root cutting net is required. That is, before and after the transplanting of the pot seedling N, almost no processing work is required for the root portion extending to the back side of the seedling box. Thereby, the working efficiency before and after transplanting the pot seedling N can be improved.

  Conventionally, there is a method of stopping root elongation using a drug at the time of raising seedlings, but since the drug is used, this method cannot be used in organic cultivation. The seedling raising method and the transplanting method of the present invention can be used even in organic cultivation because no chemicals are used for the treatment of the root extending to the back side of the seedling box.

<3. Modification>
Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment.

  In said embodiment, although the pool type seedling raising method performed in the state at which a seedling box was immersed in water in the seedling raising process was used, this invention is not this limitation. A seedling box may be placed on a seedling box installation section having a flat upper surface, and watering may be performed periodically from above the seedling box. If it does in that way, in the seedling raising process, the root extended on the back side of the seedling box will form the mat root.

  Moreover, in this embodiment, the seedling box installation part was a plate-shaped member, but the present invention is not limited to this. The seedling box installation part may be a block-like member formed of brick or concrete, or a sheet-like member that is laid on a flat soil or the like and whose upper surface is kept flat. .

  Moreover, in the transplanting method of the above embodiment, a four-row planting machine having four planting parts is used, but the present invention is not limited to this. In the transplanting method of the present invention, a single-planting, two-row planting, six-row planting, or eight-row planting machine may be used.

  Moreover, about the detailed structure of a seedling box, a transplant apparatus, and a transplant machine, you may differ from the shape shown by each figure of this application. Moreover, you may combine suitably each element which appeared in said embodiment and modification in the range which does not produce inconsistency.

DESCRIPTION OF SYMBOLS 1 Seedling box 2 Float 3 Transplanter 4 Seed taking-out part 5 Seedling conveyance part 6 Planting part 10 Mat root part 11 Seedling room 12 Grasping part 13 Seedling room block 14 Boundary part 31 Transplanting device 41 Seedling mounting table 42 Seedling box sending part 43 Seedling box Fixed part 44 Extrusion rod 101 Connection point 111 Bottom hole

Claims (6)

A method for raising seedlings using a seedling box having a plurality of seedling rooms arranged in a two-dimensional manner with holes provided in each bottom part,
a) sowing in each of the seedling rooms of the seedling box and filling with soil;
b) After the step a), raising a seedling in a state where the seedling box is placed on a seedling box installation portion having a flat upper surface;
Have
The root of the seedling grown in the seedling box cannot extend downward from the upper surface of the seedling box installation part,
Said step b)
c) A mat root portion in which a root extending from the seedling chamber through the hole to the back surface of the seedling box is intertwined with the roots of the adjacent seedling chambers to form a mat root portion covering the back surface of the seedling box in a mat shape. A seedling raising method including a forming step. The seedling raising method according to claim 1,
The seedling box installation part is a seedling raising method, which is a sheet-like, plate-like, or block-like member. The seedling raising method according to claim 1 or 2,
The said process b) is a seedling raising method performed in the state in which the said upper surface of the said seedling box installation part and at least one part containing the said hole of the said seedling box were immersed in water. A transplanting method for transplanting a pot seedling grown by the seedling raising method according to any one of claims 1 to 3 to a field,
d) For the seedling box having the mat root portion, a seedling removing step of pushing an extrusion rod into the hole from the back side of the mat root portion and taking out the pot seedling from the seedling box;
e) after the step d), transplanting the removed pot seedling to a field;
Have
The transplanting method, wherein in the step d), a through hole connected to the hole is formed in the mat root portion through the extrusion rod. The pot seedling transplanting method according to claim 4,
The seedling box is
A gripping portion disposed at both ends in the width direction;
Two nursery room blocks arranged between the gripping portions and arranged with a plurality of the nursery rooms at substantially equal intervals in the width direction;
A flat boundary disposed between the two nursery blocks;
Have
f) Before the step d), on the back surface of the boundary portion, the mat root portion formed on the back surface of one nursery block and the mat root portion formed on the back surface of the other nursery block A removal step of removing the connection portion of
In the step d), the grasping part and the boundary part are fixed. A transplanting method for transplanting a plurality of pot seedlings accommodated in a seedling box having a plurality of seedling rooms arranged in a two-dimensional manner with holes in each bottom part,
d) For the seedling box having a mat root part, a push-out rod is pushed into the hole from the back side of the mat root part, and the pot seedling is taken out from the seedling box;
e) after the step d), transplanting the removed pot seedling to a field;
Have
The mat root part is a part of the root parts of the plurality of pot seedlings accommodated in the seedling box, and the seedling room adjacent to the root extending from the seedling room to the back surface of the seedling box through the hole It is a mat-like part that covers the back of the seedling box, formed by intertwining the roots of
The transplanting method, wherein in the step d), a through hole connected to the hole is formed in the mat root portion through the extrusion rod.

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