JPH09182535A - Raising of seedling and apparatus therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide both a method for raising seedlings by which a bias due to the movement of sown seeds is eliminated and long matlike seedlings, uniform and good in entanglement of the root and excellent in strength of root entangling mat parts are obtained with slight unevenness of planting density and growth of the seedlings and an apparatus therefor. SOLUTION: Nursery plates 9 having many water flow holes 12 bored therein are laid on a cultivation bed 1 forming a water storage tank in the form of an opened top surface and nonwoven fabric for reinforcing a root entangling mat part is then laid on the top surface of each nursery plate 9 to sow the top surface thereof with seeds at a uniform density. Recessed groovelike canals 3 and 4 opened to the top surface of the base 2 are formed on the base 2 of the cultivation bed 1. Water is fed onto the base 2 of the cultivation bed 1 to thereby pass the water through the water flow holes 12 to the top surface of each nursery plate 9 and irrigate the seeds with the water from the base thereof. Thereby, matlike seedlings having formed root entangled mat parts are grown on the nursery plate 9.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seedling raising method and apparatus for mat-like seedlings having a root-entangled mat portion for mechanical transplantation of paddy rice.

[0002]

2. Description of the Related Art In order to reduce labor and improve efficiency of mechanical transplantation of paddy rice, it has been conventionally proposed that seedlings need not be supplemented during rice planting work in one field. A rice planting machine using long mat-like seedlings has been developed. The long mat-like seedlings have a length of 6 m and a width of 28 cm, for example, and if a 6-row rice transplanter is used, rice fields can be planted in a field of about 30 a without supplying seedlings.

[0003]

As described above, by using a long mat-like seedling, it is possible to significantly reduce the labor and efficiency of mechanical transplanting of paddy rice, but in terms of raising seedlings, the mat-like seedling has a long length. As the seedling density increases, the vegetation density and growth of seedlings are likely to be uneven, and the root entanglement is also uneven, and the strength of the root-entangled mat portion tends to be low. Moreover, it is important that the vegetation density and growth of the seedlings are uniform for the good growth of the rice after transplanting, and that the sufficient strength of the mat part is important for the distribution of the seedlings. In raising a long mat-like seedling, it is important to obtain a seedling having a uniform vegetation density and a uniform growth, good root entanglement, and sufficient root entanglement mat portion.

According to the research conducted by the present inventor, unevenness in the vegetation density and growth of seedlings occurs especially when raising long-matte seedlings because the water flow during irrigation in the seedling raising process causes the seeds to be irregular. It turned out to be due to moving.

That is, as shown in FIG. 9, according to the conventional seedling raising method, seeds b are sown on the upper surface of the seedling raising tank a, and the nutrient solution c is added.
Is supplied from one side of the nursery tank a, but the nutrient solution c supplied to the nursery tank a becomes a horizontal water flow on the upper surface of the nursery tank a as indicated by the arrow, so that The sown seed b is moved by the water flow and is biased in the flow direction of the nutrient solution c, and the seedlings raised are likely to have uneven vegetation density and growth. The entanglement also becomes uneven, and the root entanglement mat portion having sufficient strength is not formed.

[0006] Therefore, the present invention was sown by sowing seeds at a uniform density on the upper surface of a seedling-growing plate having a large number of water passage holes and by supplying water from the bottom surface of the cultivation bed based on the above findings. By irrigating the seeds so that the water flows vertically, the unevenness due to the movement of the seeds sown is eliminated, and the vegetation density and growth of the seedlings are small, and the root entanglement is even and good. It is an object of the present invention to provide a seedling raising method and apparatus capable of obtaining a long mat-shaped seedling excellent in strength of a root-entangled mat portion.

[0007]

In order to achieve the above object, the seedling raising method according to the present invention comprises laying a seedling raising plate having a large number of water passage holes on a cultivating bed forming a water tank having an open upper surface. , Seeds are evenly sown on the upper surface of the seedling raising plate, water is supplied from the bottom of the cultivation bed, and water is supplied from the bottom through the water holes on the upper surface of the seedling raising plate to grow mat-like seedlings entwined on the seedling raising plate. It is characterized by that.

In the seedling raising method according to the present invention, it is preferable that a non-woven fabric or other reinforcing material for the root-entangled mat portion is laid on the upper surface of the seedling raising plate and seeded on the reinforcing material.

Further, the seedling raising apparatus according to the present invention comprises a cultivation bed forming a water tank having an open upper surface, and a seedling raising plate laid on the cultivation bed and having a large number of water passage holes. Is characterized in that a water supply port is provided, and water is supplied from the water supply port onto the cultivation bed to irrigate the upper surface of the seedling raising plate through the water passage hole from the bottom surface.

In the seedling raising apparatus according to the present invention, it is preferable that a cultivating bed is provided with a grooved water channel that is open on its upper surface.

[0011]

1 to 6 show an example of a seedling raising apparatus according to the present invention. In these figures,
1 is a cultivation bed, and this cultivation bed 1 forms a water tank with an open top. On the bottom surface 2 of the cultivating bed 1, water channels 3 and 4 are formed vertically and horizontally in the form of grooves that are open to the upper surface. On one side of the cultivation bed 1, a water supply port 5 is provided from the bottom surface 2, and the water supply port 5 is a quick valve 6
The water supply unit 7 is connected to the water channels 3 and 4 from the water supply unit 7. A water supply pipe 8 is connected to the water supply port 5. In addition, water supply port 5
The water supply pipe 8 also serves as a drainage port and a drainage pipe from the cultivation bed 1.

A seedling raising plate 9 is provided on the upper surface of the cultivation bed 1.
Is laid. The seedling raising plate 9 is capable of raising four mat-like seedlings at the same time, and therefore the rising partitioning portion 10 forms four rows of seedling raising portions 11. Each seedling raising section 11 of the seedling raising plate 9 has a large number of water passage holes 12. The seedling-growing plate 9 is made of a thin steel plate, hard plastic, or plastic having such a shape that the shape can be maintained. The water holes 12 of the seedling-growing plate 9 are of a size that prevents seeds from slipping out, and the opening ratio to the area of the seedling-growing part 11 is set so as to match the speed of irrigation and drainage, the water retention rate in the seedling-growing part 11, and the like. It

The cultivating bed 1 is installed horizontally by a required number of support legs 13, and each support leg 13 is provided with a level adjuster 14 for adjusting the height.
Although the cultivation bed 1 is installed horizontally, each level adjuster 14 is arranged so that the water supply side is slightly raised to provide good irrigation from the water supply side to the other and drainage is not delayed.
Is preferably adjusted.

In raising seedlings, a seedling raising plate 9 is laid on the upper surface of the cultivating bed 1, and as shown in FIG. 6, a nonwoven fabric 15 is laid on the seedling raising plate 9 as a reinforcing material for the root-entangled mat portion, and seeds are placed thereon. Seed A at equal density. The seed A is preferably subjected to germination treatment in order to promote germination and growth of seedlings.

After sowing, when water is supplied from the bottom surface 2 of the cultivation bed 1 to its upper surface through the water supply pipe 8 and the water supply port 5, the water is supplied over the entire surface through the water channels 3 and 4 formed vertically and horizontally. Then, when water is supplied until the water level rises to an appropriate level, the seedling raising plate 9 is fed from the upper surface of the cultivation bed 1.
The water flows into the upper surface of the seedling A through the water holes 12 of the seedling A and is irrigated with the seed A sown on the upper surface of the seedling raising plate 9. The drainage from the seedling raising plate 9 is also performed from the bottom surface 2 of the cultivation bed 1 by the water inlet 5 and the water supply pipe 8. The irrigation is performed by dissolving required liquid fertilizer, pesticides, etc. according to the germination of seed A and the growth of seedlings, and the hydrogen ion concentration (PH) can be adjusted as necessary.

As described above, since the irrigation performed on the upper surface of the seedling-growing plate 9 through the water holes 2 results in a vertical water flow, the seed A seeded on the upper surface of the seedling-growing plate 9 is sown.
Is not shed laterally and is therefore not biased by seed movement. Therefore, the seedlings grown on the seedling-growing plate 9 are not uneven in vegetation density and growth, and the entanglement of the roots is good, and the entanglement of the roots is reinforced by the nonwoven fabric 15. The root entanglement mat portion 16 having various strengths is formed.

The vertical and horizontal water channels 3 and 4 formed on the bottom surface 2 of the cultivating bed 1 can supply water quickly and evenly over the entire cultivating bed 1, and the horizontal water flow on the bottom surface 2 of the cultivating bed 1 can be achieved. As a result, the lateral flow phenomenon of water irrigated to the upper surface of the seedling-growing plate 9 through the water passage holes 12 is also suppressed, and the seed A on the seedling-growing plate 9 is prevented from being biased.

Seedlings raised on the seedling raising plate 9 are shown in FIG.
The mat-shaped seedlings 17 are formed on the seedling-growing plate 9 on the seedling-growing portions 11 of the seedling-growing plate 9 along the longitudinal direction thereof as shown in FIG. To do. This mat-shaped seedling 17 in roll form
In order to prevent the seedlings from being damaged during the transportation and distribution process, the root entanglement mat portion 16 is placed outside and the seedlings are wound inside. The roll-shaped seedlings 17 are set in a rice transplanter and used for rice planting.

[0019]

EFFECTS OF THE INVENTION According to the present invention, seeds are sown evenly on the upper surface of the seedling-growing plate and water is supplied from the bottom surface of the cultivating bed so that the seeded seeds have a vertical water flow. Irrigation eliminates the unevenness caused by movement of the seeds sown, and has a uniform vegetation density and growth of the seedlings, and even and good root entanglement. Obtainable.

[Brief description of the drawings]

FIG. 1 is a perspective view of essential parts showing an embodiment of a seedling raising device according to the present invention.

FIG. 2 is a perspective view of a part of the seedling raising plate in FIG.

FIG. 3 is a plan view showing an embodiment of a seedling raising device according to the present invention.

FIG. 4 is a front view of FIG. 3;

FIG. 5 is a side view of FIG. 3;

FIG. 6 is a partially enlarged view of FIG.

FIG. 7 is a perspective view of a mat-like seedling that has been raised.

FIG. 8 is a perspective view showing an aspect in which a mat-like seedling that has been raised is rolled up into a roll.

FIG. 9 is a cross-sectional view showing a conventional seedling raising aspect.

[Explanation of symbols]

 1 Cultivation bed 2 Bottom surface 3,4 Water channel 5 Water inlet 6 Quick valve 7 Water supply part 8 Water supply pipe 9 Nursery plate 10 Standing partition part 11 Seedling part 12 Water passage hole 13 Supporting leg 14 Level adjuster 15 Nonwoven fabric 16 Root entanglement mat part 17 Mat Seedling

Claims (4)

[Claims] 1. A seedling-raising plate having a large number of water passage holes is laid on a cultivating bed forming a water tank having an open top surface, and seeds are sown evenly on the upper surface of the seedling-raising plate. A method for raising seedlings, which comprises supplying water and irrigating it from the bottom through the water holes on the upper surface of the seedling raising plate to grow mat-like seedlings on the seedling raising plate. 2. The seedling raising method according to claim 1, wherein a non-woven fabric or other reinforcing material for the root-entangled mat portion is laid on the upper surface of the seedling-growing plate and seeded on the reinforcing material. 3. A cultivating bed forming a water tank with an open top surface, and a seedling raising plate laid on the cultivating bed and having a large number of water passage holes, and a water supply port is provided on the bottom surface of the cultivating bed. A seedling-growing apparatus characterized in that water is supplied from the mouth onto the cultivation bed and water is supplied from the bottom surface through the water passage holes in the upper surface of the seedling-raising plate. 4. The seedling raising apparatus according to claim 3, wherein the cultivation bed is provided with a grooved water channel which is open on the upper surface thereof.