JPH02286001A - Tacky sheet for seeding and raising of seedling and seeding and raising of seedling - Google Patents

Abstract

PURPOSE:To obtain the title sheet having a given number of seeds efficiently positioned at given intervals in high accuracy of position and efficiently by arranging seeds on a sheetlike substrate with a partially water-insoluble and water-permeable tacky agent. CONSTITUTION:A water-soluble material such as polyethylene glycol is blended with a water-insoluble tacky agent such as rubber-based tacky agent to give a tacky agent, which is applied to a substrate such as porous paper or a water- soluble film, e.g. polyvinyl alcohol in a dotted state or a striped state. Then seeds of grain, vegetable, flower, etc., are bonded to parts of the tacky agent and optionally a plant growth regulator such as growth hormone is added to the sheet to give the aimed sheet.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to the sowing and raising of crops such as grains, vegetables, and flower petals, and in particular, to the sowing and raising of crops such as grains, vegetables, and flower petals, and in particular, to efficiently sow seeds of the crops at desired positions with high positional accuracy. The present invention relates to a sheet for sowing and raising seedlings and a method for sowing and raising seedlings that are suitable for promoting the growth of seedlings.

[Prior Art] The sowing and raising of crops such as grains, vegetables, and flower petals is roughly divided into two methods: 1. Background Art. In other words, one method is the so-called direct sowing method, in which the seeds are sown directly in the field to germinate and grow.The other method is to first sow the seeds on a small area of seedling mat or seedling bed, germinate and raise the seedlings, and then grow the seedlings. This is a method of planting them in a field. In all of the above methods, sowing has been done manually, but as the number of agricultural workers decreases and ages, the importance of improving workability and efficiency has increased in recent years. In addition, in the past, the quality of seeds was uneven, so it became essential to sow more seeds than necessary, and after germination and seedlings, so-called thinning operations, in which high-quality seedlings were left and other seedlings were removed, were necessary. was. However, with the recent progress in biotechnology, the quality and germination rate of seeds have dramatically improved due to hybridization (F0 generation) of seeds, so there has been a strong demand for a significant reduction in the amount of sowing.

To date, the following methods have been proposed for the purpose of improving workability and reducing the amount of seed sown. That is, wrap the seeds at appropriate intervals with a long water-soluble tape,
A method of burying seeds in a field. A method of burying seeds in a field by attaching them at appropriate intervals to a long tape with a water-soluble adhesive layer on the surface of a water-soluble support to fix the position of the seeds. (
(Japanese Patent Application No. 62-206492), a method of enlarging small-diameter seeds with a protective agent to make them larger and more uniform in shape, and then sowing the seeds in a field at appropriate intervals using a simple hand-held seeding machine. can be mentioned. However, even with these methods, sufficient efficiency of work has not been achieved.

On the other hand, in water mochi cultivation and rock wool cultivation, which have been rapidly expanding their fields of use in recent years, seeds are placed in a predetermined number at a predetermined interval on a small-area seedling mat made of urethane foam, etc. The procedure is to germinate the seeds, grow them for a certain period of time, and then transplant the seedlings. However, even in this case, since the size and shape of the seeds vary widely, the work of loading the seeds has generally been done manually.

Furthermore, efforts have been made since ancient times to actively foster healthy seedlings when sowing and raising seedlings of crops.

In particular, the importance of the role of roots in the growth and differentiation processes of crops, including the early stages of growth, has been recognized, and various strategies have been attempted to foster healthy roots. There are uses for plant growth regulators. Further, research has been conducted from a practical standpoint to conveniently control the growth differentiation of crops, and many plant growth regulators have been discovered. These growth regulators, whether natural or non-natural, are mostly low molecular weight organic compounds.
Generally very expensive. In addition, effective means to localize these growth regulators near seeds or seedlings for the necessary period of time have not been found, and their use has not been fully utilized. .

[Problem to be solved by the invention]

As mentioned above, in the conventional technology, even in the so-called plant factory format where seedlings are sown and raised using seedling mats or beds, the reality is that the sowing work is still carried out manually. However, there was also a lack of a means to effectively apply growth regulators during the seedling-raising period of crops.

An object of the present invention is to solve the above-mentioned problems of the prior art, to be able to efficiently mount a desired number of seeds at desired intervals on a seedling mat or seedling bed with high positional accuracy; It is an object of the present invention to provide a means for sowing and raising seedlings and a method for sowing and raising seedlings, which can effectively cause a growth regulator to act on seedlings after germination.

[Means to solve the problem]

The above purpose is a porous paper or an organic polymer film, more preferably a water-soluble paper or an organic polymer film,
is used as a support, a water-permeable adhesive composition is applied on the support in dots or streaks, seeds are mounted on the adhesive composition layer, and this is placed on a seedling mat or seedling bed. This can be achieved by leaving the seeds to germinate and raise seedlings.

Here, the above-mentioned water source permeable adhesive composition is an adhesive that has poor water resistance like an emulsion type adhesive and may allow water to gradually penetrate when it comes into contact with water for a long time. Alternatively, it can be obtained by preparing an adhesive composition in which a water-soluble or water-insoluble but hydrophilic polymer that easily permeates water is mixed into a water-insoluble adhesive. I can do it. Note that, if necessary, a plant growth regulator may be included in the above-mentioned pressure-sensitive adhesive or pressure-sensitive adhesive composition.

[For production]

The size of seeds,
Regardless of the shape, a desired number of seeds can be easily mounted on a desired site on the pressure-sensitive adhesive sheet. That is, for example, when it is desired to mount seeds in dots on the adhesive sheet, an adhesive of a desired size and shape is applied to the desired area on the support, and the seeds are stuck onto the adhesive. Just let it happen. At this time, the size and shape of the adhesive coated part are determined in advance according to the size and shape of the seeds to be loaded. If it is desired to include a plant growth regulator in the adhesive, the plant growth regulator is added to the adhesive solution in advance before coating. In this case, it is desirable to change the composition of the adhesive depending on the characteristics (eg, hydrophilicity, hydrophobicity, etc.) of the growth regulator to be added.

Seeds are loaded onto the pressure-sensitive adhesive sheet as follows. That is, after seeds are uniformly scattered on the adhesive-coated side of the adhesive sheet, the seeds are removed from areas other than the adhesive-coated area by an operation such as tilting the adhesive sheet. It is possible to obtain an adhesive sheet in which seeds are mounted only on the coated part. Alternatively, place the seeds evenly in a flat-bottomed container, cover with the above-mentioned adhesive sheet with the adhesive-coated side facing downward, and press it from above with a roller or the like, so that the seeds are placed only in the adhesive-coated area. A pasted adhesive sheet can be obtained. In this way, a desired number of seeds can be mounted on a desired site on the adhesive sheet by an extremely simple operation.

For germination and raising of seedlings, the adhesive sheet loaded with seeds as described above is placed on a seedling cloak or seedling bed and water is soaked into the sheet, or a water-soluble or water-dispersible adhesive sheet is further added onto the sheet. Germination and seedling growth can be achieved by covering the seeds with thin paper or by covering them with a small amount of soil and soaking them with water. At this time, the water-soluble or water-dispersible support and the water-soluble or water-dispersible thin paper covered as necessary absorb water and dissolve or disperse in the water, but the adhesive loaded with seeds As water gradually penetrates into the interior while maintaining its initial state in contact with the seeds, the growth tA binder contained in the adhesive dissolves near the roots of the seeds that have taken root, causing physiological It will show a activating effect. That is, when an adhesive with poor water resistance is used as an adhesive, water gradually penetrates into the adhesive if the adhesive is in contact with water for a long time. It is also non-hydrophilic.

When using an adhesive composition that is a mixture of a water-insoluble adhesive and a water-soluble or hydrophilic substance, phase separation occurs due to the lack of compatibility between the two, and the interface between the phases or the water-soluble phase Water will seep through. In this way, the growth regulator contained in the adhesive gradually dissolves.

Here, the adhesive according to the present invention will be explained as follows. In other words, commercially available adhesives are mostly water-insoluble, excluding those for special purposes, and are mainly composed of rubber adhesives, acrylic adhesives, and silicone adhesives. Any of these can be used as the water-insoluble adhesive. Specific examples of commercially available products include Vinesol R-1500 (manufactured by Ippo Sha Yushi Kogyo Co., Ltd.), SK Dyne 16o4 (manufactured by Soken Kagaku Co., Ltd.), Tisan Resin WS-023 (manufactured by Teikoku Kagaku Sangyo Co., Ltd.), and Arontac S. -1511 (manufactured by Toagosei Kagaku Kogyo Co., Ltd.). In addition, there are emulsion type acrylic adhesives as water-insoluble adhesives with poor water resistance.
A specific example of a commercially available product is Polyemal H650 (JII
U Kagakusei Co., Ltd.), Vinifuran ADH-1141 (
8 Shin Kagaku Kogyo Co., Ltd.). In addition, water-soluble substances suitable for mixing with water-insoluble adhesives include, for example, carboxyl group-containing polymers such as carboxymethylcellulose, polyvinyl alcohol, polyethylene glycol, etc. for emulsion-type adhesives, and solvent-type Examples of adhesives include polyvinylpyrrolidone and polyvinyl imbutyl ether. Water-soluble adhesives, such as commercially available Arontac S-4501 (manufactured by Toagosei Chemical Industry Co., Ltd.), SK Dyne-1127, SK
Dyne 1170 (manufactured by Soken Kagaku Co., Ltd.), Movinyl (manufactured by Hoechst Synthesis Co., Ltd.), etc. can also be used.

As the support material, water-soluble films and water-soluble papers are suitable. Specifically, the water-soluble films include Hiselon (manufactured by Nichirei Film Co., Ltd.) and Trublon (manufactured by Aicello Chemical Co., Ltd.), which are made of polyvinyl alcohol. ) etc.
Examples of water-soluble paper include Disorbo WA (manufactured by Mishima Paper Co., Ltd.), which is made from a mixture of fibrous water-soluble resin (for example, fibrous carboxymethyl cellulose) and wood pulp.

In addition, there are a wide variety of plant growth regulators that are involved in the germination of seeds such as grains, vegetables, and flower petals, and the growth of seedlings, such as auxins, gibberellins, cynins, abscisic acid, brassinosteroids, Examples include plant hormones such as oligosaccharin, nicotinamide, choline chloride, vitamins, vitamins such as salts, and fungicides such as imbrothiolane, hydroxyinxazole, and metasulfocarb. The physiological effects of these substances are 1
For example, indolebutyric acid, naphthylacetamide, ethiclozate, etc. have an effect of promoting root growth, and nicotinamide is known to have an effect of promoting root growth and rooting. It goes without saying that many growth hormones regulate plant growth, but fungicides such as isobrothiolane, hydroxyisoxazole, and metasulfocarb and the vitamin choline chloride also control the initial growth of seedlings. It is known to be effective in
C. (1987)).

In addition, in the above description, specific names of the adhesive and other materials related to the adhesive sheet of the present invention have been mentioned, but these are merely examples, and the present invention is not limited to these materials. .

Next, a method for preparing an adhesive solution and applying an adhesive will be explained. An emulsion type adhesive solution containing a growth regulator etc. can be easily obtained by adding a predetermined amount of a growth regulator etc. to an adhesive emulsion and stirring. Further, an emulsion-type adhesive liquid containing a water-soluble substance can be obtained by adding a predetermined amount of a water-soluble substance or an aqueous solution of a water-soluble substance to an adhesive emulsion and stirring the mixture. In this case as well, addition of growth regulators etc. may be carried out in the same manner as described above. In addition, a mixture of an organic solvent type adhesive and a water-soluble substance or a %N water-insoluble substance that is compatible with the adhesive can be prepared by adding a predetermined amount of the water-soluble substance or the water-insoluble substance to an organic solvent. It can be obtained by dissolving it in the above-mentioned organic solvent type adhesive. In this case, since the amount of the water-soluble or water-insoluble substance is small compared to the amount of the organic solvent-based adhesive, when a solution containing the substance is dropped while stirring the adhesive, the adhesive It is possible to obtain an adhesive solution in which the substance is dispersed.

In this case as well, addition of the growth regulator etc. can be carried out in the same manner as described above.

The adhesive can be applied as follows. In other words, if the support is porous or fibrous, if the adhesive is applied directly onto the support, the peripheral area will bleed and the desired size and shape will not be obtained. A recommended method is to apply the coating onto a release liner, dry it, and then transfer it onto a support. A printing coating method is suitable as a method for coating dotted or streaky patterns.

Above-1, we have explained the method for preparing the adhesive solution and the method for applying the adhesive, but it is also possible to prepare the adhesive solution by other methods, such as processing a sticky sheet into a tape shape, etc. There is no need to reiterate that this is possible.

〔Example〕

EXAMPLES Hereinafter, the adhesive sheet for sowing and raising seedlings and the method for sowing and raising seedlings of the present invention will be specifically explained using Examples.

Example 1 FIG. 1 is a partially enlarged view showing the structure of an example of the adhesive sheet for sowing and raising seedlings of the present invention, (a) is a top view, (b) is (a)
FIG. 2 is a cross-sectional view taken along line AA' of FIG. Here, an emulsion-type acrylic adhesive was used as the adhesive, and the size and shape of the applied adhesive was a circle with a diameter of 1.5 m suitable for mounting Komatsuna seeds one by one. .

Komatsuna seeds are mounted on the adhesive sheet with the above structure, the adhesive sheet is placed on a seedling raising mantle, water is sprayed from above, and the adhesive sheet is left indoors at approximately 23°C to observe changes in the adhesive and the growth of the seeds. When the germination state was tested, the adhesive maintained its original shape even after the support was disintegrated by water, and the seeds germinated while in contact with the adhesive.

In addition, a pressure-sensitive adhesive sheet was prepared in the same manner as above using a pressure-sensitive adhesive containing 0.01% indolebutyric acid, and Komatsu rape seeds were sown and marketed. In this case too, seed loading occurred as desired.

Here, the germination rate of seeds was compared for manual sowing, using an adhesive sheet without indole butyric acid, and using an adhesive sheet containing indole butyric acid (
The number of test seeds (300 each) was 92
%, 91%, and 93% results were obtained. Furthermore, although it is difficult to numerically compare the growth status of seedlings, visual tl results showed that the best seedling growth results were obtained for the sample using the adhesive sheet containing indolebutyric acid.

Example 2 90 parts by weight (as solid content) of an emulsion-type acrylic adhesive and 10 parts of carboxymethyl cellulose dissolved in water.
Parts by weight (as solid content) were added and thoroughly mixed, and then coated on a support in the same manner as in Example 1 to produce a pressure-sensitive adhesive sheet. When Komatsu rape seeds were sown on the pressure-sensitive adhesive sheet thus obtained, the seeds could also be mounted at desired positions in this case as well.

In addition, 0.1% and 1% of nicotinic acid amide in terms of solid content were added to the carboxymethylcellulose aqueous solution, and adhesive sheets I. were produced in the same manner as above.

Here, when we compared the seed germination rates of adhesive sheets without nicotinic acid amide, with 0.1% added, and with 1% added, it was 92% and 94%, respectively, based on 300 seeds sown.
, 91%. Although it was difficult to make a numerical comparison, the growth condition of the seedlings was somewhat better with the sheet containing nicotinic acid amide, and no difference was observed depending on the amount added.

Example 3 10 parts by weight (solid content) of polyvinyl isobutyl ether dissolved in acetone was added to 90 parts by weight (solid content) of a solvent-type acrylic adhesive, and the mixture was thoroughly stirred to form an adhesive solution.
A pressure-sensitive adhesive sheet was prepared by applying the solution in dots to the supporting soil.

The adhesive sheet thus obtained showed sufficient performance as a seed loading sheet, but when the adhesive dots were observed under magnification, as shown in Figure 2, it was found that acrylic, which is non-water soluble, It is known that phase separation occurs between the system adhesive and the water-soluble polymer polyvinyl isobutyl ether, resulting in the water-soluble polymer phase 4 being scattered in the form of islands within the water-insoluble adhesive phase 3. It was done. Further, when the sheet was impregnated with water and the changes in the dots were examined by fil-Q, it was observed that water was flowing into the dots via the water-soluble polymer phase 4.

From the results of these 11 observations, when sowing and raising seedlings using an adhesive sheet made by adding a growth regulator to the adhesive, the growth regulator is gradually dissolved over a long period of time. It was easy to understand, and the actual results of sowing and raising seedlings corroborated this.

Example 4 The method of Example 3 was also applied to an adhesive sheet obtained by applying an adhesive solution prepared by mixing a solvent-type water-insoluble adhesive A agent and a water-soluble adhesive diluted with an organic solvent to the supporting soil. Similar results were obtained.

In this case, the mixing ratio of the water-insoluble adhesive and the water-soluble adhesive can be in the range of 100:O to O:100, but it is difficult to detect changes in the shape of the adhesive dots when impregnated with water. From this, it was found that a range of 50:50 to 90:10 is desirable.

[Effects of the Invention] As described above, by applying the adhesive sheet for sowing and raising seedlings and the method for sowing and raising seedlings of the present invention, the problems of the prior art can be solved and the desired seedlings can be grown on the seedling mat or bed. It is now possible to efficiently load a desired number of seeds with high positional accuracy at intervals of , and to have a growth regulator effectively act on the seedlings after germination.

[Brief explanation of the drawing]

FIG. 1 is a partially enlarged view showing the structure of an embodiment of the adhesive sheet for sowing and raising seedlings of the present invention, (a) is a top view, (b) is (a)
FIG. 2 is an enlarged view of adhesive dots in another embodiment of the adhesive sheet for sowing and raising seedlings of the present invention.

Claims (1)

[Scope of Claims] 1. A pressure-sensitive adhesive sheet for seeding and raising seedlings comprising a sheet-like support and an adhesive provided on the support, wherein the pressure-sensitive adhesive is water-permeable and at least a part of it is water-insoluble. An adhesive sheet for sowing and raising seedlings, characterized by comprising an adhesive. 2. The pressure-sensitive adhesive sheet for sowing and raising seedlings according to claim 1, wherein the pressure-sensitive adhesive is a pressure-sensitive adhesive containing a water-soluble polymer. 3. The adhesive sheet for sowing and raising seedlings according to claim 2, wherein the water-soluble polymer is a water-soluble adhesive. 4. Claim 1, wherein the adhesive is an adhesive provided in dots or stripes on the support.
Adhesive sheet for sowing and raising seedlings as described in section. 5. A pressure-sensitive adhesive sheet for seeding and raising seedlings consisting of a sheet-like support and an adhesive provided on the support, wherein the pressure-sensitive adhesive is water-permeable, at least a part of which is composed of a water-insoluble pressure-sensitive adhesive, and An adhesive sheet for sowing and raising seedlings, characterized in that it is an adhesive containing a plant growth regulator. 6. Seeds are placed on the adhesive-coated part of an adhesive sheet for seeding and seedling-raising, which is coated with an adhesive made of a water-permeable and at least partially water-insoluble material in dots or stripes on a sheet-like support. A method for sowing and raising seedlings, which comprises placing the seed-loaded adhesive sheet on a seedling mat or bed to germinate and raise seedlings. 7. The method for sowing and raising seedlings according to claim 6, wherein the adhesive is an adhesive containing a plant growth regulator.