JPH05292805A - Sheet for seeding and raising seedling - Google Patents

Abstract

PURPOSE:To obtain the subject sheet providing high-quality flowering plants and vegetables effective for saving labor of seeding operation and improving efficiency by providing a water-soluble or water dispersible substrate with a tacky agent layer, attaching seeds on the layer and fixing the seeds to the substrate with a water-soluble polymer. CONSTITUTION:A tacky agent layer 2 such as acrylic tacky agent dots having 0.5mm diameter is subjected to screen printing at equal intervals at 288 spots on a water-soluble or water dispersible substrate (e.g. water-soluble paper) 1 and stock seeds 3 are sprinkled on the tacky agent layer 2 to load one seed 3 on one dot of the tacky agent. The seed is coated with a water-soluble polymer (e.g. polyvinyl alcohol) film 4 having 25mum thickness separately prepared while spraying steam upon the film, the film is bonded to the seed and the water-soluble polymer layer 4 is stuck to the substrate 1 to give the objective sheet for seeding and raising seedling suitable for seeding and raising seedling of very small seeds, contributing to labor saving of seeding operation and improvement in efficiency, providing high-quality flowering plants and vegetables.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seeding and raising sheet used for seeding and raising seedlings in a field, and more particularly to a seeding and raising seedling sheet having a constitution suitable for sowing and raising seeds of minute seeds.

[0002]

2. Description of the Related Art Conventionally, sowing work in a field is generally carried out by hand sowing, and in some cases, sowing is also carried out by a machine. In addition, so-called seed tape in which seeds are enclosed in a water-soluble tape, seed paper in which seeds are fixed on a water-soluble paper with an adhesive, etc. are put on the field or nursery for germination and raising seedlings. Some have been done. In addition, a seeding and raising seedling sheet suitable for a cultivation method in which seedlings are preliminarily sown at a specific place to grow seedlings has been recently developed (Japanese Patent Laid-Open No. 64-20035, Japanese Patent Laid-Open No. 1-296909, etc.). The seed tape, which was developed for the purpose of labor saving sowing, is a seed that is physically enclosed in a tape made of a water-soluble film so as not to fall off, but it is necessary to keep the position between seeds at an appropriate distance. Can be difficult and can injure the seedlings. Also, the seed paper is a seed fixed on a water-soluble paper with a water-soluble adhesive, and although it is excellent in fixing and setting the position of the seed, since the position where the adhesive and the seed are dropped is mechanically determined, Patterns with close seed spacing are difficult to produce, and are also difficult to apply to very small seeds. Since the seeding and raising seedling sheet developed in recent years is not intended to firmly fix the seeds, it is not necessarily suitable to arbitrarily perform the operation with the seeds mounted on the sheet.

[0003]

Generally, it is extremely difficult to sow seeds at a predetermined number and at a predetermined interval when sowing by hand in a sowing operation or by using a sowing device or a sowing tool. Therefore, it is necessary to sow the seeds evenly, and perform thinning work after germination and growth.
This requires a huge amount of time and effort, and this labor saving is strongly demanded.

In order to meet the above requirements, seeds can be fixed in an arbitrary pattern and at an interval and firmly so that they can be easily handled without fear of falling off, and various seeds such as flowers and vegetables can be fixed. There is a demand for the development of a seedling raising seedling sheet that can flexibly respond to seeding raising seedlings and contribute to labor saving of seeding.

An object of the present invention is to solve the problems of the above-mentioned prior art, and to provide a seedling-raising and raising sheet having a structure suitable for sowing and raising seeds of particularly small seeds, which is difficult to handle. is there.

[0006]

The above object is to provide a seedling-growing sheet comprising a water-soluble or water-dispersible support on which a pressure-sensitive adhesive layer is provided, and seeds are attached to the pressure-sensitive adhesive layer. This can be achieved by using a sheet for seeding and raising seeds having a constitution in which it is fixed on a support by a water-soluble polymer layer.

[0007]

[Function] If a pressure sensitive adhesive having sufficient tackiness for capturing seeds to be sown is accurately applied at a predetermined position on a support such as water-soluble paper, the seeds can be sprinkled on the support to form a support. The seeds can be attached to the desired places of the plant at desired intervals. The pressure-sensitive adhesive can be applied in any form such as linear or dot-like, but dot-like application is superior for controlling the number of seeds loaded. In order to mount one seed in one place, the coated area of the adhesive must be sufficiently small compared to the size of the target seed. Screen printing is suitable as a method for applying a small-area pressure-sensitive adhesive with an arbitrary shape and interval. As the type of the adhesive, a commercially available adhesive can be arbitrarily selected and used as long as it has no inhibitory effect on germination of seeds, growth of seedlings and the like. When screen printing is applied, it is needless to say that the printability is excellent.

If a curable adhesive is used as the adhesive, it is possible to cure the adhesive after mounting the seeds and fix the seeds so that they will not fall off during normal operation. When fixing one at a time,
Since the pressure-sensitive adhesive also needs to be minute, the contact area between the seed and the pressure-sensitive adhesive is extremely small, and thus many seeds may drop off in the normal operation. Also, some seeds are difficult to fix. In such a case, coating with a water-soluble polymer becomes an extremely effective means.

When the thin film of the water-soluble polymer is formed so as to cover the surface of the seed mounted on the adhesive, the seed is firmly fixed to the extent that it does not fall off by a normal operation. The form of the polymer thin film may be a laminate film, or may be a film in which seeds are coated and penetrated into the support. This membrane should fix the seeds to the support until the sheet is placed on the germination bed, and it should dissolve quickly once watered on the germination bed so as not to prevent germination of the seeds.

Examples of water-soluble polymers having such properties include polyvinyl alcohol, polyvinylpyrrolidone, water-soluble acrylic resins, etc. as synthetic polymers.
Examples of natural polymers include cellulose derivatives such as carboxymethyl cellulose, methyl cellulose and hydroxypropyl cellulose, starch derivatives such as starch and carboxymethyl starch, and various polysaccharides such as alginic acid and pectin. Since these polymers have a film-forming ability and an adhesive ability, they can be used alone or in a mixture for seed fixation.

In order to fix the seeds mounted on the support through the adhesive with the above-mentioned polymer, the small part on which the seeds are mounted may be coated with a polymer and fixed, or the whole surface of the support may be fixed with the polymer. You may coat with. Screen printing is suitable for coating the polymer only on the seed mounting part.
In order to coat the entire surface of the support with a polymer, lamination of a polymer thin film, roll coating of a polymer solution, spray coating of a polymer solution, etc. are effective. When the polymer thin film is laminated, it is possible to form a multilayer structure of the support, the adhesive, the seed, and the polymer without changing the state of the support. When the polymer solution is applied,
Since the polymer penetrates into the support, it is possible to fix the seed in such a state that the seed and the whole support are solidified with the polymer.

The seeded seedling-growing sheet of the present invention having the above-mentioned structure can fix any seeds on the support at desired intervals and patterns without dropping off, regardless of the size of the seeds. In this case, the seeds can be rapidly sown at a predetermined position by a predetermined number of grains, and the polymer is easily dissolved in water, so that germination of the seeds is not hindered.

[0013]

EXAMPLES Hereinafter, the seeding and raising seedling sheet of the present invention will be specifically described with reference to Examples.

[0014]

[Example 1] 0.5 m diameter on a commercially available 300 mm x 600 mm water-soluble paper
288 m acrylic adhesive dots were screen-printed at equal intervals, and seeds of stock were sprinkled on the dots to mount one seed per dot of the adhesive. Then, a separately prepared polyvinyl alcohol film having a thickness of about 25 μm was coated thereon while spraying steam, and pressure-bonded to bond the water-soluble paper and the polyvinyl alcohol film. In this way
A seed-growing sheet was obtained by fixing seeds on a water-soluble paper support.

FIG. 1 is a conceptual view showing a cross section of the seedling raising seedling sheet produced as described above, which is cut at a seed mounting portion.
Reference numeral 1 is a support made of water-soluble paper, 2 is a pressure-sensitive adhesive coated on the support 1 in dots, 3 is a stock seed, and a hatched portion 4 is polyvinyl alcohol.

The above seeding and raising seedling sheet was placed on a germination bed made of peat moss, water was supplied, and a germination test was conducted. The polyvinyl alcohol film was swollen and dissolved by water supply, and no trouble was caused in seed germination.

[0017]

[Example 2] In the same manner as in Example 1, a commercially available 300 m
288 acrylic adhesive dots having a diameter of 0.5 mm were screen-printed on m × 600 mm water-soluble paper at equal intervals, and seeds of stock were sprinkled on the dots to mount one seed on each dot of the adhesive. Then, a polyvinyl alcohol solution having a concentration of about 10% dissolved in a water / methanol mixed solvent was sprayed onto the water-soluble paper containing seeds to coat it with polyvinyl alcohol. In this case, polyvinyl alcohol penetrated into the water-soluble paper as the support, but was dried at 55 ° C. as it was.

FIG. 2 is a conceptual view showing a cross section of the seedling-growing sheet of this embodiment cut at the seed mounting portion, and the reference numerals in the drawing are exactly the same as those in the first embodiment. In this case as well, the seed was firmly fixed to the support by being wrapped in the water-soluble polymer that had penetrated into the support.

The sheet for sowing and raising seedlings of this example was prepared as in Example 1.
In the same manner as in the above, the germination test was carried out by placing on a germination bed made of peat moss and supplying water. The water supply dissolved the polyvinyl alcohol and did not hinder the germination of the seeds.

[0020]

Example 3 Commercially available starch was dissolved in water at 60 ° C., and an equal amount of methanol was added to prepare a solution having a concentration of about 15%.
This was sprayed on a seed mounting sheet prepared in the same manner as in Example 2 and dried to fix the seed.

A seed germination test was conducted on the seeding and seedling-growing sheet produced as described above in the same manner as in the above-mentioned examples, and as a result, an equivalent germination rate result was obtained as compared with the control sample not coated with polyvinyl alcohol. Was obtained.

[0022]

[Embodiment 4] Commercially available 300 mm in the same manner as in Embodiment 1.
288 acrylic adhesive dots having a diameter of 0.2 mm were screen-printed at equal intervals on a 600 mm water-soluble paper, and lisianthus seeds were sprinkled on the dots to mount one seed on each dot of the adhesive. Then water / methanol 1: 1 on top of it
Roll-coated colloidal carboxymethyl cellulose having a concentration of 2% dissolved in a mixed solvent was applied. This was dried at 55 ° C to obtain a sheet for seeding and raising seeds of Eustoma grandiflorum.

A seed germination test was conducted on this sheet in the same manner as in the above-mentioned Examples, and the same germination rate result was obtained as compared with the control sample not coated with carboxymethyl cellulose.

[0024]

EFFECTS OF THE INVENTION By using a seeding and raising seedling sheet of the present invention as the seeding and raising seedling sheet, the problems of the prior art can be solved, and it is particularly suitable for seeding and raising seeds of minute seeds that are difficult to handle. It was possible to provide a sheet for seeding and raising seedlings having various configurations.

As a result, a high-performance seeding and raising sheet suitable for seeding and raising small seeds can be provided to farmers and the like, which can contribute to labor saving and efficiency improvement of the seeding work, and high quality flower It helps to provide vegetables to the people.

[Brief description of drawings]

FIG. 1 is a conceptual diagram showing a cross section of the seedling raising seedling sheet of Example 1 cut at a seed mounting portion.

FIG. 2 is a conceptual diagram showing a cross section obtained by cutting the seedling raising sheet of Example 2 at a seed mounting portion.

[Explanation of symbols]

1 ... Support made of water-soluble paper, 2 ... Adhesive coated in dots on support, 3 ... Stock seed, 4 ... Polyvinyl alcohol.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Norimasa Kamezawa 3819, Otsukamachi, Yukiya, Ota-ku, Tokyo Inside Sliontech Co., Ltd.

Claims (5)

[Claims] 1. A seeding and nursery sheet comprising a pressure-sensitive adhesive layer provided on a water-soluble or water-dispersible support, and seeds adhered to the pressure-sensitive adhesive layer, wherein the seeds are coated on a support with a water-soluble polymer layer. A sheet for seeding and raising seedlings, which is fixed to the sheet. 2. The water-soluble polymer layer is a water-soluble polymer layer provided on the surface of a support containing seeds adhered onto the pressure-sensitive adhesive layer provided in dots.
The sheet for seeding and raising seedlings described. 3. The water-soluble polymer layer is a water-soluble polymer layer provided on the surface and inside of a support containing seeds adhered onto the pressure-sensitive adhesive layer provided in dots. Item 2. A seeding and raising seedling sheet according to item 1. 4. The sheet for seeding and raising seeds according to claim 1, wherein the water-soluble or water-dispersible support is made of paper or a polymer film. 5. The seeding and seedling raising sheet according to claim 1, wherein the water-soluble polymer is a natural polymer or a synthetic polymer having adhesiveness, or a mixture of a natural polymer and a synthetic polymer.