JPH04200303A - Sowing sheet - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a seeding sheet, and more particularly to a seeding sheet that is suitable for the germination and growth of plants and inhibits the germination and growth of weeds.

Conventional techniques and problems Conventionally, seeds have been fixed to the notebook surface of a sheet of water-disintegrating and biodegradable material using a water-soluble adhesive, or seeds have been sandwiched between two sheets of the material. The sheet is known as a seeded sheet.

Compared to direct sowing, this seeding sheet should be adapted to the optimum yield (it is easier to control the spacing between seeds and the amount of sowing, and it also saves the effort of sowing and thinning after germination). Furthermore, it has the advantage of preventing seeds and cultivated soil from being washed away by wind and rain.

However, with conventional seeding sheets, especially two-sheet sorting, the seeds and soil do not mix well due to the sheet interposed between the seeds and the soil, and if artificial watering is not used to manage the water supply, the sheets will The seeds dry out and float, separating the seeds from the soil and making it impossible to moisten them. In addition, the sheet itself becomes an obstacle to the elongation of roots and shoots, which may actually be more disadvantageous than direct sowing from the viewpoint of germination and growth.

The problem after sowing is the complexity of weeding.

Especially for plant seeds that require a long period of time to germinate, there are few herbicides that can be safely used at this stage.
They are often forced to perform manual labor in unnatural positions.

However, so far, it has been hard to find a seeding sheet that takes weed control into full consideration.

Means for Solving the Problems In view of the above circumstances, the present inventors have developed a method that has good compatibility between seeds and soil, has no adverse effects on germination and growth due to the presence of sorting, and also suppresses weeds. We have been conducting extensive research to develop a method for seeding that can be done.

The present invention was made as a result of such research, and is made by joining a base sheet that has light-shielding properties and has a plurality of holes and a covering sheet that is water-disintegratable and biodegradable. The present invention provides a seeding sheet characterized in that seeds are fixed with a water-soluble adhesive onto the joint side surface of the covering sheet at a position corresponding to the above.

The present invention will be described below with reference to the drawings.

FIG. 1 is a sectional view schematically showing the seeding sheet of the present invention. FIG. 2 is a perspective view schematically showing a base sheet and a covering sort that constitute the seeding sheet of FIG. 1.

Referring to FIGS. 1 and 2, the seeding sort of the present invention is as follows:
Basically, it consists of a base sheet (1), a covering sheet (2) and seeds (3).

First, the covering sheet (2), which is usually the upper side when laid, is made of a material that is water-disintegratable and biodegradable. Here,
The term water-disintegrable as used herein refers to dissolving or physically falling apart in water. Furthermore, biodegradable means that it eventually becomes an inorganic substance in a broad sense through the action of microorganisms in the soil. That is, the covering sheet used in the present invention disintegrates with water and eventually returns to soil.

On the other hand, the base sheet (1,) that comes into contact with the ground below when the seeding sheet is laid is made of a material that has been colored black or vapor-deposited with aluminum to provide light-shielding properties. Preferably, the material is
Compared to covering sheet materials, use materials that are relatively difficult to disintegrate or decompose even with irrigation or natural rainfall. This is to allow the base sheet to continue to exist for an appropriate period even after the covering sheet ceases to exist, as will be described later.

Next, referring to specific sheet materials, examples of the base sheet materials used in the present invention include a polyolefin film colored black and a polyolefin film coated with aluminum on one side. It is also possible to use a dense nonwoven fabric made by accumulating ultrafine cellulose fibers colored black and tightly intertwining the fibers with each other with needle bunches.

On the other hand, materials for the covering sheet include dry or wet nonwoven fabrics derived from natural products such as Bulb and Konoton. Furthermore, a water-soluble film typified by polyvinyl alcohol can also be used as this material.

The seeding sheet of the present invention is made by joining such a covering sheet and a base sheet. A plurality of holes are provided in the base sheet, and seeds (3) are fixed with an adhesive (4) on the adhesive surface of the covering sheet portion corresponding to each person. In this case, the seeds are spaced from each other and arranged regularly or randomly. Here, examples of adhesives that can be used for fixing seeds include water-soluble natural or synthetic polymer compounds, such as starch-based ones, glue, casein, carboxymethyl cellulose, polyvinyl methyl ether, and polyvinyl pyrrolidone. .

On the other hand, the base sheet and the covered notebook are bonded together by bonding them together using a water-soluble resin such as polyvinyl methyl ether or polyvinyl pyrrolidone. Alternatively, bonding may be performed by heat sealing or the like.

By adopting such a configuration, the adhesive (
4) dissolves and the seeds (3) settle in the soil. Such rapid settling allows the seeds to begin normal physiological activities toward germination without being adversely affected by the sheet. The holes (5) provided in the base sheet are for not interfering with the settling. Therefore, it is preferable that the size of the hole is such that at least the seeds can pass through, and the area is less than 30 cm. If the area is too large, the seed spacing becomes too large, which reduces the seeding rate and reduces the light-shielding property. , which is unfavorable from the viewpoint of weed suppression, which will be described later.

At this time, if a base sheet made of a material that disintegrates or decomposes relatively slowly is used, it will remain around the seeds even after the covering sheet has disappeared, preventing the soil from drying out and suppressing the rise in soil temperature. The seeding tray of the present invention is particularly suitable for stable production of low-temperature crops during high-temperature seasons. Examples of such low-temperature crops include spinach, lettuce, salad greens, Chinese cabbage, celery, peas, green beans, radish, carrots, and the like.

Furthermore, by adopting the configuration described above, when the seeding sheet of the present invention is laid down, the light-shielding base sheet covers the ground surface, preventing light from reaching weed seeds and inhibiting their germination and growth. can.

On the other hand, the target seeds that have settled will settle in the hole area, that is, in a position where there is no light-blocking material nearby.
can receive light.

In addition, in the seeding sheet of the present invention, various hormones, minerals, useful microorganisms, physiologically active substances produced by the microorganisms, enzymes, etc. are attached to the seed material or fixed seeds, if desired, to prevent germination of the seeds.・Can promote growth.

The seeding sheet of the present invention can be easily produced by joining a covering sheet to which seeds are fixed and a substrate with holes in it by the above-described method.

Thus, the seeding sheet of the present invention obtained can be spread on bare ground, cultivated soil, or a breeding box in a developed area, and by covering it with soil as appropriate, it can be suitably used for sowing various plants other than the above-mentioned low-temperature crops. I can do it.

If the material constituting the covering sheet has particularly good water solubility, it is also possible to lay the base sheet as the upper surface and the covering sheet as the lower surface in contact with the ground, contrary to the boat fishing method.

The present invention will be explained in more detail with reference to Examples below.

Example 1 A sheet of paper with a basis weight of 20 g/m2 made of 100% unbleached bulb was used as a covering sheet, and one spinach seed was attached to one side of the sheet at 15 cm intervals using a methanol solution of polyvinyl methyl ether as an adhesive.

Next, a black colored polyethylene film having a thickness of 0.03 mm with holes of 3 cm in diameter formed in positions relative to the seeds of the covering sheet was attached using the same adhesive as described above to obtain a seeded sheet of the present invention.

This sheet was laid on the ridges of cultivated land with the polyethylene film facing down, and the seeding work was completed by appropriately covering and compacting the soil.

On the other hand, a control plot in which only seeds were similarly sown, covered with soil, and compacted without using the seeding sheet of the present invention was set up adjacent to the test plot. Three weeks later, the germination rate (%) and weed growth condition (relative value when the control plot was set as 100) in both plots were compared. The results are shown in Table 1. The cropping type was summer-sown.

Table 1 Example 2 Wet-paper-making black-colored bulbs to obtain fiber aggregation density FIj
A black paper of 1,2 g/cm3 was obtained. The tensile strength of this paper when wet was 0.2 kg/3 cm width or more in any direction. Holes with a diameter of 1 cm were made at intervals of 2.5 cm over the entire surface of this paper to obtain a long piece with a total width of 4 Q cm.

Next, a water-soluble polyvinyl alcohol film with a thickness of 25 μm was used as a covering sheet, and an ethanol solution of polyvinylpyrrolidone was applied to one side of the coating sheet to adhere Kanamachi turnip seeds one by one at intervals of 10 cm.

Both sheets were joined using the same adhesive so that the center of the seed and the hole corresponded to each other to form a long piece with a width of 40 cm.

The thus-obtained seeds were laid on the surface of the flattened ridges of cultivated land with black paper facing upwards, covered with soil as appropriate, and compacted to complete the seeding work.

Effects of the Invention The present invention provides a seeding sheet that is suitable for the smooth germination and growth of target seeds and can sufficiently suppress the germination and growth of weeds.

That is, when using the seeding sheet of the present invention, seeds attached to the sheet due to rainfall or irrigation at the initial stage of laying easily fall off, settle in the soil at that position, receive light from the upper periphery, and grow in the soil. Combined with the water retention properties derived from wood sorting and the ability to regulate soil temperature in the summer, germination and growth are promoted. Here, the covering sheet quickly decomposes or disintegrates and does not hinder the germination and growth of seeds.

On the other hand, with respect to weeds, the light-blocking properties of the base sheet sufficiently inhibit the germination and growth of weeds.

[Brief explanation of the drawing]

FIG. 1 is a sectional view schematically showing the seeding sheet of the present invention, and FIG. 2 is a perspective view schematically showing a base sheet and a covering sheet constituting the seeding sheet of FIG. The symbols in the drawings have the following meanings. 1: Base sheet, 2: Covering sheet, 3: Seed, 4: Adhesive, 5. Hole Patent applicant Dynic Co., Ltd. 1 representative patent attorney Aoyama Aoyama Hamegawa

Claims (1)

[Claims] (1) A base sheet having a light-shielding property and having a plurality of holes formed therein and a covering sheet having water-disintegrating properties and biodegradability are joined together, and the joined side surface of the covering sheet is located at a position corresponding to each hole. A seeding sheet characterized by having seeds fixed thereon with a water-soluble adhesive.