JP2011036139A - Raising seedling bed and method for producing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a raising seedling bed which is mass-producible at low cost, can be planted as it is so as not to damage the root of a seedling when transplanting the seedling, contributes to environmental conservation, and utilizing woody material to use the minimum necessary amount of soil: and to provide a method for producing the raising seedling bed. <P>SOLUTION: The raising seedling bed is utilized as follows: placing two raising seedling beds 1 in a tray 9 side by side; putting a sweet pepper seed P1 and a pepper seed P2 each in an open hole 1a; placing leaf mold over the seeds respectively; and filling the tray 9 with liquid fertilizer-dissolved aqueous solution 10. The porous raising seedling bed 1 absorbs the aqueous solution 10 to give moderate moisture to the sweet pepper seed P1 and the pepper seed P2. The raising seedling bed 1 absorbs up only a certain amount of the aqueous solution 10 to have no anxiety of root rot, and retains moisture in an amount several times the volume thereof when the tray 9 becomes empty so as to be free from shortage in moisture even when the aqueous solution 10 is not added even for about one week. About one month after sowing the seeds, the sweet pepper P1 and the pepper P2 grow to have leaves, and the sweet pepper P1 blooms. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a nursery bed and a method for producing the same that do not damage the roots of seedlings at the time of replanting because it has biodegradability, and a method for producing the same. The present invention relates to a nursery bed that minimizes the amount of soil used and a method for producing the same.

  In order to display and sell seedlings of plants such as flowers and vegetables, plastic nursery pots (nursing pots) have been used conventionally. The seedling pots made of such thin plastics are very cheap and extremely light, so they are widely used in the market. However, they require a lot of soil and must be removed when planting in planters or fields. Therefore, the roots of the seedlings are easily damaged, the replanting work is complicated, and the remaining plastic seedling pots become environmentally hazardous substances.

  Therefore, plant seedlings can be grown and can be planted as they are in planters and fields, so that planting work is easy without damaging the roots of seedlings, and no environmentally hazardous substances are produced. Biodegradable nursery pots are being developed. Examples of such biodegradable nursery pots include those according to the inventions described in Patent Documents 1 to 4. In the invention described in Patent Document 1, paper / wood chips and grass are crushed into granules as a biodegradable material. The plant seedling roots are easy to pass through, but the culture soil is A seedling pot is made of holes, slits or cuts that are difficult to spill.

  Further, in the invention described in Patent Document 2, 30 to 70 parts by weight of palm fiber that has been crushed with respect to 100 parts by weight of non-wood fiber composed of pressed bamboo fiber and grass plant fiber. And 1 to 3 parts by weight of vegetable starch are added, and a kneaded product obtained by adding an appropriate amount of water and stirring and kneading is pressed and molded, and dried to obtain a plant growth bed. Furthermore, in patent document 3, the container main body which formed the fiber decomposed | disassembled in soil, swollen by water absorption, and formed so that the root of the germinated plant could be penetrated, and it was incorporated in the container main body. An invention of a plant growing kit having a plant growing floor and a filler made of fibers decomposed in soil contained in the plant growing floor is disclosed.

  Further, in Patent Document 4, a sheet made of plant fibers such as coconut shell fiber and hemp fiber is impregnated with a binder to produce a sheet made of binder-impregnated plant fibers, and then the sheet is heated and pressure-molded using a mold. Then, it is a container-shaped molded body having a double-walled structure and having a bottomless cross section and is filled with a plant growth filler in the hollow portion of the double wall, and then made of a plant fiber sheet. A plant fiber planter formed by bonding the bottom plate of the container-shaped molded body with the lower peripheral edge of the outer wall of the double wall of the container-shaped molded body as a bonding surface and sealing the lower surface of the container-shaped molded body The invention is disclosed.

JP 2002-315443 A JP 2005-333850 A Japanese Patent No. 299926 Japanese Patent No. 4210842

  However, the technique described in Patent Document 1 is superior to conventional plastic seedling pots in that it can be buried in a field or the like without taking out the seedlings at the time of replanting. The point which requires culture soil is the same. Moreover, in the technique described in Patent Document 2, since the molding conditions (press pressure, pressurization time, filling amount) are not clarified, it is not possible to produce a plant growth floor having predetermined characteristics.

  Furthermore, the patent inventions described in Patent Document 3 and Patent Document 4 have a problem that the structure is complicated and cannot be mass-produced, resulting in an increase in sales price and the need for a large amount of land. It was. By using such a large amount of soil for use and culture, weeds are likely to grow, and pests such as root cut insects are propagated to hinder the growth of plant seedlings. Therefore, it is desirable not to use soil for use or culture as much as possible.

  Therefore, the present invention has been made to solve such a problem, and is extremely excellent in mass productivity, can be manufactured at low cost, and can be planted as it is at the time of replanting, so that the root of the seedling is damaged. The purpose of the present invention is to provide a nursery bed and a method for producing the same that can contribute to environmental conservation and that use wood materials to minimize the amount of soil used.

A nursery bed according to the invention of claim 1 is a nursery bed containing finely pulverized wood flour, coarsely pulverized wood flour, humus and / or rice husk charcoal, and an organic synthetic resin binder, wherein the finely pulverized wood The powder has an average particle size in the range of 30 μm to 500 μm, the coarsely pulverized wood powder has an average particle size in the range of 1 mm to 10 mm, the finely pulverized wood powder, the coarsely pulverized wood powder, the humus and / or or after mixing the chaff Kaorusumi and the organic synthetic resin binder in precision dispersing mixer is made by press-forming by applying a pressure within the range of 30kg / cm ² ~100kg / cm ² at room temperature.

  Here, the “average particle diameter” is a value of an average particle diameter measured with a laser diffraction particle size distribution measuring device Microtrac for finely pulverized wood flour. In addition, as a method of obtaining coarsely pulverized wood flour having an average particle diameter of 1 mm to 10 mm, for example, sawdust such as large sawdust, thinned wood chips, small-diameter wood, lumber mill ends, and bark can be pulverized. As a method for obtaining a finely pulverized wood powder having an average particle size in the range of 30 μm to 500 μm, for example, the above coarsely pulverized wood powder is dried to a moisture content of 20% or less and then pulverized. There are methods such as fine grinding. In addition, it is preferable to mix bark such as cedar as a raw material of coarsely pulverized wood powder.

  In addition, as the “organic synthetic resin binder”, thermoplastic resins such as polyethylene, polypropylene, polyvinyl chloride, polyvinylidene chloride, polystyrene, polyvinyl acetate, acrylic resin, phenol resin, epoxy resin, polyol resin, isocyanate resin, Thermosetting resins such as melamine resin, urea resin, unsaturated polyester resin, and alkyd resin can be used, and two or more of these resins can be mixed and used.

  Furthermore, as the “precision dispersion mixer”, a high-speed stirring dispersion machine having a peripheral speed in the range of 20 m / second to 30 m / second can be used. As such a high-speed stirring disperser, for example, there is a horizontal stabilizer manufactured by Hosokawa Micron Corporation.

  The nursery bed according to the invention of claim 2 is the composition of claim 1, wherein the blending ratio is 100 parts by weight to 100 parts by weight of the coarsely pulverized wood powder with respect to 100 parts by weight of the finely pulverized wood powder. And / or 75 to 200 parts by weight of rice husk charcoal, the organic synthetic resin binder is 100 parts by weight in total of the finely pulverized wood powder, the coarsely pulverized wood powder and the humus and / or rice husk charcoal, 5 to 25 parts by weight, more preferably 15 to 25 parts by weight.

  The nursery bed according to the invention of claim 3 is the constitution of claim 1 or claim 2, wherein the organic synthetic resin binder is an isocyanate resin, or a polyol resin and an isocyanate resin.

  The nursery bed according to the invention of claim 4 has a moisture content in the range of 6% to 20% in any one of claims 1 to 3.

  According to a fifth aspect of the present invention, there is provided a nursery bed according to any one of the first to fourth aspects, wherein a shallow hole is drilled on one surface and plant seeds or bulbs are placed to put humus and / or rice husk charcoal. And / or covered with soil.

  The nursery bed according to the invention of claim 6 is the structure of any one of claims 1 to 5, wherein the thickness in the direction in which the pressure is applied is 5% to 50% of the length in the direction perpendicular to the direction. %, More preferably in the range of 10% to 25%.

The method for producing a nursery bed according to the invention of claim 7 includes a wood powder mixing step of mixing a finely pulverized wood powder having an average particle diameter of 30 μm to 500 μm with an organic synthetic resin binder to obtain a wood powder mixture, and an average A fine dispersion mixing step in which coarsely pulverized wood powder and humus and / or rice husk charcoal within a particle diameter range of 1 mm to 10 mm are mixed with the wood powder mixture with a fine dispersion mixer to form a raw material mixture, and the raw material mixture press-molded by applying a pressure within the range of 30kg / cm ² ~100kg / cm ² at room temperature was filled in a press mold, in which includes a press forming step of the nursery floor.

  The method for producing a nursery bed according to the invention of claim 8 is the constitution of claim 7, wherein the proportion of the coarsely pulverized wood powder is 100 parts by weight to 600 parts by weight with respect to 100 parts by weight of the finely pulverized wood powder. The humus and / or rice husk charcoal is 75 parts by weight to 200 parts by weight, and the organic synthetic resin binder is a total of 100 parts by weight of the finely pulverized wood powder, the coarsely pulverized wood powder and the humus earth and / or rice husk charcoal. On the other hand, it is 5 to 25 parts by weight, more preferably 15 to 25 parts by weight.

  The method for producing a nursery bed according to the invention of claim 9 is the structure of claim 7 or claim 8, wherein the organic synthetic resin binder is an isocyanate resin, or a polyol resin and an isocyanate resin.

  According to a tenth aspect of the present invention, there is provided a method for producing a nursery bed according to any one of the seventh to ninth aspects, wherein an inner wall surface of the press mold is filled with a raw material mixture having a high proportion of the finely pulverized wood flour. The inside is filled with a raw material mixture having a large proportion of the coarsely pulverized wood powder.

The nursery bed according to the invention of claim 1 is a nursery bed containing finely pulverized wood powder, coarsely pulverized wood powder, humus and / or rice husk charcoal, and an organic synthetic resin binder, and the finely pulverized wood powder Has an average particle diameter in the range of 30 μm to 500 μm, the coarsely pulverized wood powder has an average particle diameter in the range of 1 mm to 10 mm, and finely pulverized wood powder, coarsely pulverized wood powder, humus and / or rice husk and charcoal after mixing the organic synthetic resin binder in precision dispersing mixer, made by press-forming by applying a pressure within the range of 30kg / cm ² ~100kg / cm ² at room temperature.

  Here, the pressure holding time of the press molding may be about 30 seconds to several minutes, and since it is a room temperature press, the product can be taken out immediately after the press molding and the next press molding can be performed. A floor product can be manufactured, and it is extremely excellent in mass productivity. In addition, finely pulverized wood powder, coarsely pulverized wood powder, humus and / or rice husk charcoal are molded and solidified with an organic synthetic resin binder, so that the inside has a structure with many voids, and is several times the volume. If it is a normal plant seedling, it can be grown only by watering about once a week.

  Furthermore, it has a structure with many voids inside and a layered structure along a plane perpendicular to the pressing direction, so that the thin roots of plant seedlings can extend in all directions inside the plant. The thick roots of the seedlings can extend along the layered surface and do not hinder growth. In addition, since all the raw materials are mixed with a precision dispersion mixer, even if weed seeds and pests are contained in the humus, it will be crushed by the precision dispersion mixer, so when using it as a nursery bed There are no weeds or pests that damage the seedlings. Furthermore, the sterilization action of lignin and tannin contained in finely pulverized wood powder and coarsely pulverized wood powder can also prevent the growth of pests, molds and the like.

And as a result of repeated earnest experiment research, the inventor has an average particle diameter of 30 μm to 500 μm as finely pulverized wood powder, and an average particle diameter of 1 mm to 10 mm as coarsely pulverized wood powder. and it is suitable ones, as the pressure of press molding found that in the range of 30kg / cm ² ~100kg / cm ² is suitable, in which to complete the present invention based on this finding.

That is, when the average particle size of the finely pulverized wood powder is less than 30 μm, it is too fine to have a structure with many voids inside, and when the average particle size of the finely pulverized wood powder exceeds 500 μm, it is too coarse. As a nursery bed, the strength will be insufficient. In addition, when the average particle diameter of the coarsely pulverized wood powder is less than 1 mm, it is too fine and the internal voids become small, and when the average particle diameter of the coarsely pulverized wood powder exceeds 10 mm, it is too coarse to serve as a nursery bed. The strength will be insufficient. Further, when the pressure of press molding is less than 30 kg / cm ² , the density is too low and the strength as a nursery bed is insufficient, and when the pressure of press molding exceeds 100 kg / cm ² , it is too dense. The internal gap becomes small.

In addition, since the nursery bed according to the present invention can be molded by a room temperature press, uniform heating from the outside is not required, so an extremely thick molded body can be formed, and a nursery bed having a thickness of up to 500 mm ^t can be formed. Is possible. Furthermore, since a heating mechanism is not required, the effect of simplifying the structure of the press molding machine and the mold can be obtained. As a result, it is possible to mold a nursery bed having a large area of about 1000 mm × 2000 mm. It becomes.

  And since the nursery bed according to the present invention is mainly composed of finely pulverized wood powder, coarsely pulverized wood powder, humus and / or rice husk and charcoal, when replanting the grown seedling into a planter or a field, By planting the whole nursery bed as it is, the finely pulverized wood powder and coarsely crushed wood powder are biodegraded and returned to the soil, so replanting is easy and there is no risk of damaging the roots of the seedling.

  In this way, it is extremely mass-productive, can be manufactured at low cost, and can be planted as it is at the time of replanting, so that it does not damage the roots of the seedlings and contributes to environmental conservation. It will be used as a nursery to minimize the amount of soil used.

  The nursery bed according to the invention of claim 2 has a blending ratio of 100 to 600 parts by weight of coarsely pulverized wood powder, 75 parts by weight of humus and / or rice husk charcoal with respect to 100 parts by weight of finely pulverized wood powder. ~ 200 parts by weight, organic synthetic resin binder is 5 to 25 parts by weight, more preferably 15 parts by weight with respect to a total of 100 parts by weight of finely pulverized wood powder, coarsely pulverized wood powder and humus and / or rice husk charcoal Since it is ˜25 parts by weight, in addition to the effect of the invention according to claim 1, by incorporating a large amount of coarsely pulverized wood powder, the inside can be more reliably made into a structure with many voids, If it is an ordinary plant seedling, it can be grown only by watering about once a week. Moreover, since there are few compounding ratios of an organic synthetic resin binder, the biodegradability of a nursery bed is not prevented.

  In the nursery bed according to the invention of claim 3, since the organic synthetic resin binder is an isocyanate resin, or a polyol resin and an isocyanate resin, in addition to the effects of the invention of claim 1 or claim 2, The pulverized wood powder and the coarsely pulverized wood powder can be bonded with high strength in a porous state, and a nursery bed having strength that is easy to handle as a product and excellent in water retention can be obtained more reliably.

  The nursery bed according to the invention of claim 4 has a moisture content in the range of 6% to 20%, so in addition to the effects of the inventions of claims 1 to 3, it is stored for a long period of one year or more. However, since the pulverization of finely pulverized wood powder and coarsely pulverized wood powder does not start, it can be stored without changing characteristics such as water retention and strength, and a nursery bed that can hold a lot of inventory Become.

  Since the nursery bed according to the invention of claim 5 is formed by making a shallow hole on one surface and putting plant seeds or bulbs and covering with humus and / or rice husk charcoal and / or soil, In addition to the effects of the invention according to the first to fourth aspects, the plant grows easily because the nursery bed absorbs water and the plant germinates just by purchasing it and transferring it to a container containing water at home. It becomes a plant cultivation set. Here, by keeping the moisture content of the nursery bed within the range of 6% to 20%, the seeds or bulbs of the plant will not germinate and will not rot even if stored for a long time. It can hold a lot of inventory.

  The nursery bed according to the invention of claim 6 has a thickness in a direction in which pressure is applied within a range of 5% to 50% of a length in a direction perpendicular to the direction. In addition to the effects of the invention according to the invention, finely pulverized wood powder and coarsely pulverized wood powder are densely connected in the longitudinal direction by pressing pressure even when formed into a thin plate shape with a thickness close to 5% of the length. The structure becomes a high-strength thin-plate nursery. Therefore, for example, by placing such a lamellar nursery bed on a container filled with an aqueous solution in which liquid fertilizer is dissolved at an appropriate concentration, the roots of the plants planted on the nursery bed penetrate the lamellar nursery bed. It can reach an aqueous solution and grow plants like hydroponics.

  Moreover, when it is formed into a thick plate shape with a thickness close to 50% of the length, the plant is grown to a seedling state and then suitable as a nursery bed for replanting in a field or the like. . In this case, since the volume of the nursery bed may be small, an aggregate of small nursery beds in which small nursery beds are arranged vertically and horizontally can be formed at a time. This allows seedling farmers to plant seeds such as flowers for each small nursery bed and grow them up to seedlings, and keep them as a collection of small nursery beds or separate them into small nursery beds and sell them to seedling retail stores such as home centers. Can be shipped.

In the method for producing a nursery bed according to the invention of claim 7, in the wood powder mixing step, a finely pulverized wood powder having an average particle diameter of 30 μm to 500 μm is mixed with an organic synthetic resin binder to form a wood powder mixture, In the precision dispersion mixing step, the wood powder mixture and the coarsely pulverized wood powder having an average particle diameter of 1 mm to 10 mm and humus and / or rice husk charcoal are mixed with a precision dispersion mixer to form a raw material mixture. Then, in the press molding process, the raw material mixture is filled in a press mold, and press molded by applying a pressure within the range of 30kg / cm ² ~100kg / cm ² at room temperature.

  Thus, the finely pulverized wood powder is first mixed uniformly with the organic synthetic resin binder, and then mixed with the coarsely pulverized wood powder and humus and / or rice husk charcoal, thereby pulverizing the wood with a small amount of the organic synthetic resin binder. A biodegradable nursery bed that can form powder, coarsely pulverized wood powder and mulch and / or rice husk charcoal firmly and in a porous form in the press molding process, has excellent water retention and is easy to handle. Can be manufactured. In addition, since the press molding process is a room temperature press, the product can be taken out immediately after press molding and the next press molding can be performed, and many nursery products can be manufactured in a short time. It becomes a manufacturing method excellent in property.

  Furthermore, it has a structure with many voids inside and a layered structure along a plane perpendicular to the pressing direction, so that the thin roots of plant seedlings can extend in all directions inside the plant. The thick roots of the seedlings can extend along the layered surface and do not hinder growth. In addition, since all the raw materials are mixed with a precision dispersion mixer, even if weed seeds and pests are contained in the humus, it will be crushed by the precision dispersion mixer, so when using it as a nursery bed There are no weeds or pests that damage the seedlings. Furthermore, the sterilization action of lignin and tannin contained in finely pulverized wood powder and coarsely pulverized wood powder can also prevent the growth of pests, molds and the like.

And as a result of repeated earnest experiment research, the inventor has an average particle diameter of 30 μm to 500 μm as finely pulverized wood powder, and an average particle diameter of 1 mm to 10 mm as coarsely pulverized wood powder. and it is suitable ones, as the pressing pressure in the press molding process found that in the range of 30kg / cm ² ~100kg / cm ² is suitable, in which to complete the present invention based on this finding.

That is, when the average particle size of the finely pulverized wood powder is less than 30 μm, it is too fine to have a structure with many voids inside, and when the average particle size of the finely pulverized wood powder exceeds 500 μm, it is too coarse. As a nursery bed, the strength will be insufficient. In addition, when the average particle diameter of the coarsely pulverized wood powder is less than 1 mm, it is too fine and the internal voids become small, and when the average particle diameter of the coarsely pulverized wood powder exceeds 10 mm, it is too coarse to serve as a nursery bed. The strength will be insufficient. Further, when the press pressure in the press molding process is less than 30 kg / cm ² , the density is too low and the strength as a nursery bed is insufficient, and when the press pressure in the press molding process exceeds 100 kg / cm ² , It is too dense and the internal voids become small.

In the method of manufacturing the seedling bed according to the present invention, since it is press-molded by cold pressing, for uniform heating from outside is not necessary, it is possible to mold a very thick shaped body, 500 mm ^t It is possible to produce nursery beds with thicknesses up to. Furthermore, since a heating mechanism is not required, the effect of simplifying the structure of the press molding machine and the mold can be obtained. As a result, it is possible to produce a nursery bed having a large area of about 1000 mm × 2000 mm. It becomes.

  In this way, it is extremely mass-productive, can be manufactured at low cost, and can be planted as it is at the time of replanting, so that it does not damage the roots of the seedlings and contributes to environmental conservation. It will be a method for producing nursery beds that use the minimum amount of soil for use.

  In the method for producing a nursery bed according to the invention of claim 8, the blending ratio is 100 parts by weight to 600 parts by weight of coarsely pulverized wood powder, 100 parts by weight of coarsely pulverized wood powder, humus and / or rice husk charcoal. 75 parts by weight to 200 parts by weight, more preferably 5 parts by weight to 25 parts by weight, more preferably 100 parts by weight of the organic synthetic resin binder for a total of 100 parts by weight of finely pulverized wood powder, coarsely pulverized wood powder and humus and / or rice husk charcoal Since it is 15 parts by weight to 25 parts by weight, in addition to the effect of the invention according to claim 7, a large amount of coarsely pulverized wood powder is blended, so that the inside can be more reliably made into a structure with many voids. If it is a normal plant seedling, it can be grown only by watering about once a week. Moreover, since there are few compounding ratios of an organic synthetic resin binder, the biodegradability of a nursery bed is not prevented.

  In the method for producing a nursery bed according to the invention of claim 9, since the organic synthetic resin binder is an isocyanate resin, or a polyol resin and an isocyanate resin, in addition to the effects of the invention according to claim 7 or claim 8, Finely pulverized wood powder and coarsely pulverized wood powder can be bonded with high strength in a porous state at room temperature, and it is possible to more reliably obtain a nursery bed having strength that is easy to handle as a product and excellent in water retention. .

  In the method for producing a nursery bed according to the invention of claim 10, the inner wall surface of the press mold is filled with a raw material mixture having a high proportion of finely pulverized wood powder, and the raw material mixture having a high proportion of coarsely pulverized wood powder is filled therein. In addition to the effects of the inventions according to claims 7 to 9, a nursery bed having a structure with a relatively dense outer surface and a large number of voids inside can be easily produced. This makes it possible to provide a nursery bed that is easier to handle and has excellent water absorption and water retention.

  In addition, by increasing the proportion of finely pulverized wood powder on the outer side (inner wall surface side of the press mold) and increasing the proportion of coarsely pulverized wood powder on the inner side, the outer surface of the nursery bed can be made more dense and wooden. It can be made into the thing of the structure which was made like the container of this, and the earth was filled inside. In this case, since it is difficult to absorb water from the outer surface, water is replenished from the top like a normal flower pot.

  Thus, even if the outer surface has a dense structure, the raw material is mainly wood flour, so it has biodegradability, and it is nurtured by burying it in the soil as it is when the plant seedling grows to an appropriate size. The floor biodegrades into soil and the plant can grow beyond the size of the nursery bed. Moreover, if it is the kind of plant which can be grown with a flower pot, a nursery bed can be used like a flower pot as it is, without replanting.

FIG. 1 is a flowchart showing a method for producing a nursery bed according to Embodiment 1 of the present invention. Fig.2 (a) is a perspective view of the nursery bed manufactured by the manufacturing method of the nursery bed which concerns on Example 1 of this invention, (b) is AA sectional drawing of (a). FIG. 3 is a perspective view showing a use state of the nursery bed according to Embodiment 1 of the present invention. FIG. 4 is a perspective view showing a nursery bed and its usage according to Embodiment 2 of the present invention. Fig.5 (a) is a perspective view which shows another usage method of the nursery bed which concerns on Example 2 of this invention, (b) is BB sectional drawing of (a). FIG. 6A is a perspective view showing a nursery bed (an assembly of small nursery beds) according to Example 3 of the present invention, and FIG. 6B is a plant seed planted in the nursery bed according to Example 3 and put in a tray. (C) is a perspective view which shows a mode that the nursery bed which concerns on Example 3 is isolate | separated into a small nursery bed.

  In carrying out the present invention, wood sawdust such as large sawdust, thinned wood, small-diameter wood, bark, lumber mill ends, etc., is used as coarsely pulverized wood powder having an average particle diameter of 1 mm to 10 mm, and average particles It is necessary to use finely pulverized wood powder having a diameter in the range of 30 μm to 500 μm. Here, the average particle diameter of the wood flour is a value measured with a laser diffraction particle size distribution measuring device Microtrac for finely ground wood flour, and a value measured with calipers for coarsely ground wood flour.

  Specifically, as a method of obtaining coarsely pulverized wood powder having an average particle diameter in the range of 1 mm to 10 mm, rough sawdust such as large sawdust, thinned wood, small diameter wood, bark, lumber mills, etc. is roughened with a crusher (wood crusher). As a method for obtaining finely pulverized wood powder having an average particle size in the range of 30 μm to 500 μm, specifically, the coarsely pulverized wood powder is dried to a water content of 20% or less with an air dryer. There is a method of finely pulverizing with a fine pulverizer.

  Here, as the “fine pulverizer”, it is preferable to use a fine pulverizer having a peripheral speed in the range of 50 m / sec to 80 m / sec. Examples of such a fine pulverizer include a pin mill machine manufactured by Hosokawa Micron Corporation and a micron colloid mill manufactured by Kawamoto Tekko Co., Ltd. Moreover, it is more preferable that the average particle diameter of the finely pulverized wood powder is in the range of 50 μm to 250 μm.

  As the “humic soil”, commercially available humic soil can be used, and composted fermented leaves, rice straw, wheat straw, tea bowl, soybean cake, coconut shell, etc. can also be used. In order to uniformly mix these finely pulverized wood powder, coarsely pulverized wood powder, humus and / or rice husk charcoal with an organic synthetic resin binder, a precision dispersion mixer is used, and the peripheral speed ranges from 20 m / second to 30 m / second. It is preferable to use a high-speed stirring disperser. As such a high-speed stirring disperser, for example, there is a horizontal stabilizer manufactured by Hosokawa Micron Corporation.

  Furthermore, as the “organic synthetic resin binder”, it is preferable to use an isocyanate resin alone or a mixture of a polyol resin and an isocyanate resin. As the polyol resin, polyoxyethylene glycerether, polyoxypropylene glycerether, polyoxybutylene glycerether, or the like can be used. As the isocyanate resin, polyethylene polyphenyl polyisocyanate or the like can be used.

  Here, when the water content of the mixture of finely pulverized wood powder, coarsely pulverized wood powder, humus and / or rice husk charcoal is high, it is preferable to use the isocyanate resin alone. This is because the isocyanate resin cures in the presence of moisture and exhibits an adhesive action. On the other hand, when the water content of the mixture of finely pulverized wood powder, coarsely pulverized wood powder and humus and / or rice husk charcoal is low, it is preferable to use a mixture of polyol resin and isocyanate resin.

  Further, as the mixing order, it is preferable to mix the polyol resin with the finely pulverized wood powder, further mix the isocyanate resin, and then mix the coarsely pulverized wood powder and humus and / or rice husk charcoal with a precision dispersion mixer. . Here, a mixture of finely pulverized wood powder and a polyol resin is not cured as it is, and can be stored for a long period of time.

Example 1
Examples of the present invention will be described below, but the present invention is not limited to these examples. First, a nursery bed and a manufacturing method thereof according to Example 1 of the present invention will be described with reference to FIGS. 1 to 3.

  FIG. 1 is a flowchart showing a method for producing a nursery bed according to Embodiment 1 of the present invention. Fig.2 (a) is a perspective view of the nursery bed manufactured by the manufacturing method of the nursery bed which concerns on Example 1 of this invention, (b) is AA sectional drawing of (a). FIG. 3 is a perspective view showing a use state of the nursery bed according to Embodiment 1 of the present invention.

  First, a method for producing a nursery bed according to the first embodiment will be described with reference to FIG. As shown in FIG. 1, first, wood chips 2 such as thinned timber, small-diameter wood, sawn timber, bark, and large sawdust such as cedar are coarsely crushed by a crusher (wood crusher) (step S10). . When the average particle diameter of the coarsely pulverized wood powder 3 obtained in this way was measured with a caliper, the average particle diameter was 2 mm.

  Subsequently, one third of the total amount of the coarsely pulverized wood powder 3 is dried with hot air to a water content of 20% by weight or less with a hot air dryer (step S11), and finely pulverized with a fine pulverizer (step S12). It was set to pulverized wood powder 4. Here, as a fine pulverizer, a micron colloid mill manufactured by Kawamoto Tekko Co., Ltd. was used, and the pulverization turbine blades were pulverized at a peripheral speed of 50 m / second to 80 m / second. When the average particle size of the finely pulverized wood powder 4 obtained was measured with a laser diffraction particle size distribution measuring device Microtrac manufactured by Nikkiso Co., Ltd., the average particle size was 150 μm.

  Next, 20 parts by weight of polyol resin 6 is added to 100 parts by weight of finely pulverized wood powder 4 and mixed uniformly with a precision dispersion mixer (horizontal TCX-14 manufactured by Hosokawa Micron Corporation). did. Here, “Sanix GP-400” manufactured by Sanyo Chemical Industries, Ltd., which is polyoxypropylene glyceryl ether, was used as the polyol resin 6. Subsequently, 40 parts by weight of the isocyanate resin 7 is added to 100 parts by weight of the finely pulverized wood powder 4 and mixed uniformly with a precision dispersion mixer (TCX-14) (step S13). The same weight of humus (compost) 5 and the remaining coarsely pulverized wood flour 3 (2/3 of the total amount) were added and mixed uniformly (step S14).

  Therefore, in Example 1, with respect to 100 parts by weight of finely pulverized wood powder 4, 200 parts by weight of coarsely pulverized wood powder 3, 100 parts by weight of humus (compost) 5, and organic synthetic resin binders 6 and 7 15 parts by weight are blended with respect to a total of 100 parts by weight of finely pulverized wood powder 4, coarsely pulverized wood powder 3 and humus 5 respectively. Here, as the isocyanate resin 7, “Lupranate M-20S” manufactured by BASE INOAC Polyurethane Co., Ltd., which is a polyethylene polyphenyl polyisocyanate, was used. Moreover, since the finely pulverized wood powder 4 and the coarsely pulverized wood powder 3 contain moisture, the mixing ratio of the polyol resin 6 and the isocyanate resin 7 is preferably about 1: 2.

The final mixed wood powder produced in this way was filled in a die of a press molding machine (step S15), and press molded at room temperature by applying a pressure of 50 kg / cm ² for 1 minute (step S16). As a result, the height of the final mixed wood flour filled in the press mold became about one third, and the nursery bed 1 according to the present invention was manufactured. Here, since the press molding process (step S16) is a room temperature press, the next press molding process can be performed immediately after taking out the nursery bed 1 as a product, and the manufacturing method is extremely excellent in mass productivity. Become.

In the present Example 1, a roughly cubic block (L1 = W1 = t1 = 90 mm) of about 90 mm square as shown in FIG. Therefore, it is possible to form a block having a thickness of up to 500 mm ^t as a thick article.

  As shown in FIG. 2B, the nursery bed 1 according to Example 1 manufactured in this way has a structure with many voids inside and a layered structure along a plane perpendicular to the press direction. Thus, the thin roots of the plant seedlings can extend in all directions inside, and the thick roots of the plant seedlings can extend along the layered surface, so that the growth is not hindered.

  In Example 1, as shown in FIG. 2 (a), an opening hole 1a for planting a plant seed is provided on the upper surface of the nursery bed 1 at the same time as molding by a press die. It is also possible to manufacture a substantially cubic nursery bed without an opening hole and to open the opening hole 1a later with a drill, a pointed metal rod or the like.

  Thereby, since the opening hole 1a for planting a seed | species can be provided also in a side surface, a seed | species can be planted in a more suitable position by the characteristic of a plant. Specifically, in the case of a plant in which a thick root extends in the vertical direction, it is preferable to provide the opening hole 1a on the side surface, and in the case of a plant in which a thick root extends in the horizontal direction, it is preferable to provide the opening hole 1a on the upper and lower surfaces.

  Next, a specific use example of the nursery bed 1 according to the first embodiment will be described with reference to FIG. As shown in FIG. 3, two nursery beds 1 according to the first embodiment are placed side by side in a plastic tray 9, and seeds of Shishito P1 are placed in the opening holes 1 a of one nursery bed 1. The humus soil was covered, and the seed Pepper P2 was put in the opening hole 1a of the other nursery bed 1 to cover the humus soil. Then, an aqueous solution 10 in which liquid fertilizer was dissolved at an appropriate concentration was filled in the tray 9 to about half the depth of the tray 9.

  As a result, the porous nursery bed 1 sucks up the aqueous solution 10 and gives appropriate moisture to the seeds of Shishito P1 and chili P2. No matter how much the amount of the aqueous solution 10 in the tray 9 is increased, the porous nursery bed 1 sucks up only a certain amount of the aqueous solution 10, so there is no concern about root rot due to excessive moisture. When seedlings of Shishito P1 and chili pepper P2 are grown and the aqueous solution 10 of the nursery bed 1 is absorbed, the nursery bed 1 sucks up the corresponding aqueous solution 10 from the tray 9 and supplies it.

  Even if all of the aqueous solution 10 in the tray 9 is sucked up and emptied, the nursery bed 1 retains water several times its volume, so that it is possible to run out of water for about a week without adding the aqueous solution 10. Absent. Therefore, the trouble of watering can be saved and the plants P1 and P2 can be taken care of easily. In this way, about one month after placing the tray 9 in the room and sowing the seeds, as shown in FIG. 3, Sitoshi P1 and chili P2 grow and attach a large number of leaves. Flowers bloomed. Furthermore, after that, the chili P2 also blossomed, and both Shishito P1 and chili P2 had fruit.

  As described above, the nursery bed 1 according to the first embodiment is a substantially cubic block of about 90 mm square, so that the shiitake P1 and the chili P2 can be grown without being replanted. Can be used as a substitute for flowerpots. As a result of subsequent tests, it was found that cherry tomatoes, eggplants, and okra also grew and fruited without replanting. In addition, since the nursery bed 1 which concerns on the present Example 1 has biodegradability, the used nursery bed 1 can be discarded like normal soil.

  In addition, as shown in FIG. 1, the nursery bed 1 according to the first embodiment is prepared by mixing raw materials with a precision dispersion mixer at the manufacturing stage, and further using raw coarse powder 3 and fine ground wood 4. Since the lignin and tannin contained in the plant have a sterilizing action, as shown in FIG. 3, weeds do not grow, and pests such as root-cut insects do not hinder plant growth. Can grow healthy.

  In addition, as a modified example of the nursery bed 1 according to the first embodiment, plant seeds or seedlings, bulbs, etc. such as shishito, coconut, chili, cherry tomato, okra, pepper are put in the opening hole 1a shown in FIG. Products that are covered with humus, sealed and labeled with plant names can also be sold as products. In this case, by setting the moisture content of the nursery bed 1 to 20% or less, the seeds and bulbs of the plant do not germinate and the seedlings do not grow, so they can be kept in the store for a long time and stored as stock. You can also.

  The consumer who has purchased this product simply peels off the seal and immerses it in a container containing an aqueous solution as shown in FIG. 3, and the nursery bed 1 sucks up the aqueous solution and the plant germinates. Can be grown at home. Furthermore, as another modification of the nursery bed 1 according to the first embodiment, the consumer does not need to prepare an aqueous solution in which liquid fertilizer is dissolved by mixing and press-molding solid or liquid fertilizer in the manufacturing stage. Since it is only necessary to give water, plants can be cultivated more easily. In addition, the nursery bed 1 which concerns on the present Example 1 can also be press-molded by mixing an agrochemical in a manufacture stage as needed.

  Thus, in the nursery bed 1 and its manufacturing method according to the first embodiment, it is extremely excellent in mass productivity, can be manufactured at a low cost, and there is no need for replanting, so the root of the seedling can be damaged. In addition, it can contribute to environmental conservation, and it is possible to reliably prevent the generation of weeds and pests by using the wood material to minimize the amount of soil used.

Example 2
Next, a nursery bed and a manufacturing method thereof according to Example 2 of the present invention will be described with reference to FIGS. FIG. 4 is a perspective view showing a nursery bed according to Embodiment 2 of the present invention and a method for using the same. Fig.5 (a) is a perspective view which shows another usage method of the nursery bed which concerns on Example 2 of this invention, (b) is BB sectional drawing of (a).

  First, a method for producing a nursery bed according to the second embodiment will be described with reference to FIG. The manufacturing method of the nursery bed 11 according to the second embodiment is substantially the same as the manufacturing method of the nursery bed 1 of the first embodiment shown in the flowchart of FIG. The difference is that 25 parts by weight of organic synthetic resin binders 6 and 7 are blended with respect to a total of 100 parts by weight of finely pulverized wood powder 4, coarsely pulverized wood powder 3 and humus 5 and the internal shape of the press mold. As shown in FIG. 4, the nursery bed 11 to be manufactured is also a point having a length L2 = 400 mm, a width W2 = 150 mm, and a thickness t2 = 20 mm.

  As shown in FIG. 4, eight thin holes 11 a are formed in such a thin plate-shaped nursery bed 11, green onion P3 seeds are put therein, and humus is covered, and the length and width are the same as those of the nursery bed 11. An aqueous solution 13 in which liquid fertilizer was dissolved was filled in a tray 12 of a degree, and a nursery bed 11 was placed thereon. When the green onion P3 grows and buds and the root grows, the root grows in the aqueous solution 13 in which the liquid fertilizer is dissolved, and as shown in FIG. 4, the green onion P3 can be grown like hydroponics. .

  FIG. 5 is a modification of the second embodiment, and shows a case where the cherry tomato P4 is grown as a plant using the nursery bed 11 and the dedicated container 14.

  The container 14 is a dedicated container for growing a plant that grows in a vine shape or a plant that bears heavy fruits, and has a column hole 14a to which a column 15 for supporting a plant vine or stem can be attached. We prepare for place. In the second embodiment, the container 14 is made of ceramics but can be made of other materials such as plastic. Moreover, as FIG.5 (b) shows, the container 14 is also provided with the protrusion part 14b for supporting the nursery bed 11 horizontally.

  As shown in FIG. 5 (a), open holes 11a are made in six places on the nursery bed 11, and seeds of small tomato P4 are put in them and covered with humic soil. As shown in FIG. The floor 11 was placed on the protruding portion 14b of the container 14, and the container 14 was filled with the aqueous solution 13 in which liquid fertilizer was dissolved. When the cherry tomato P4 grows, the pillars 15 are respectively set in the pillar holes 14a and tied with a vinyl string or the like so that the branches of the cherry tomato P4 do not fall down. Thereby, even if a lot of fruit grows on the branch of cherry tomato P4, the branch does not break and can be grown healthy.

  Thus, in the nursery bed 11 and its manufacturing method according to the second embodiment, it is extremely excellent in mass productivity, can be manufactured at low cost, and there is no need for replanting, so the root of the seedling can be damaged. In addition, it can contribute to environmental conservation, and it is possible to reliably prevent the generation of weeds and pests by using the wood material to minimize the amount of soil used.

Example 3
Next, a nursery bed according to Example 3 of the present invention will be described with reference to FIG. FIG. 6A is a perspective view showing a nursery bed (an assembly of small nursery beds) according to Example 3 of the present invention, and FIG. 6B is a plant seed planted in the nursery bed according to Example 3 and put in a tray. (C) is a perspective view which shows a mode that the nursery bed which concerns on Example 3 is isolate | separated into a small nursery bed.

  As shown in FIG. 6A, the nursery bed 16 according to the third embodiment is an aggregate of 6 × 8 = 48 small nursery beds 16A. The size of each small nursery bed 16A is length L3 = width W3 = 40 mm and thickness t3 = 20 mm, and the overall size of the nursery bed 16 is length = 320 mm and width = 240 mm. Thus, the assembly 16 of the small nursery beds 16A can be manufactured at a time in the same manner as in the first embodiment shown in the flowchart of FIG. 1 only by changing the shape of the upper die of the press mold.

  In Example 3, as shown in FIG. 6 (b), the produced nursery bed 16 is turned over, and an opening hole 16a is opened for each small nursery bed 16A, and the seed of Petunia P5 is in the opening hole 16a. The entire nursery bed 16 was placed in a shallow tray 17 and filled with an aqueous solution 18 in which liquid fertilizer was dissolved. Eventually, when the petunia P5 germinates and the seedling grows to an appropriate size, as shown in FIG. 6C, it can be divided into small nursery beds 16A and sold in stores.

  Consumers who have purchased a small nursery bed 16A with petunia P5 seedlings simply plant the small nursery bed 16A in a home planter or garden, and the small nursery bed 16A is mainly made of wood flour and humus. Therefore, it gradually changes to soil, and Petunia P5 can be grown even larger, and gardening can be enjoyed easily. The nursery bed 16 which is an assembly of the small nursery bed 16A and the small nursery bed 16A can be mass-produced and is supplied at an extremely low cost. Furthermore, since the small nursery bed 16A is manufactured as shown in the flowchart of FIG. 1, weeds and pests do not grow.

  Thus, in the nursery bed 16 and its manufacturing method according to the third embodiment, the seedling root is extremely excellent in mass productivity, can be manufactured at low cost, and can be planted as it is at the time of replanting. It is possible to contribute to environmental conservation without damaging the environment, and by using woody materials, the amount of soil used can be minimized, and the generation of weeds and pests can be reliably prevented.

  In each of the above embodiments, 200 parts by weight of coarsely pulverized wood powder 3, 100 parts by weight of humus (compost) 5 and finely pulverized organic synthetic resin binders 6 and 7 with respect to 100 parts by weight of finely pulverized wood powder 4 The case where 15 parts by weight or 25 parts by weight, respectively, is added to the total 100 parts by weight of the wood powder 4, the coarsely pulverized wood powder 3 and the humus 5 is described, but the mixing ratio of each component is not limited to this. Can be changed freely. In particular, 100 parts by weight of finely pulverized wood powder 4 is 100 to 600 parts by weight of coarsely pulverized wood powder 3, 75 parts by weight to 200 parts by weight of mulch 5, and finely pulverize organic synthetic resin binders 6 and 7 The amount is preferably 15 to 25 parts by weight with respect to 100 parts by weight as a total of the wood powder 4, the coarsely pulverized wood powder 3 and the humus 5.

  In each of the above embodiments, the case where the polyol resin 6 and the isocyanate resin 7 are used as the organic synthetic resin binder has been described. However, other organic synthetic resin binders can also be used. In particular, when the moisture content of the coarsely pulverized wood powder 3, the finely pulverized wood powder 4, and the humus (compost) 5 is high, it is not necessary to use the polyol resin 6, and only the isocyanate resin 7 is used as the organic synthetic resin binder. it can.

  Further, in each of the above embodiments, the case where the nursery beds 1, 11, 16 are dipped in the aqueous solutions 10, 13, 18 in which liquid fertilizer of an appropriate concentration is dissolved has been described. By mixing the, the plant can be grown by simply immersing it in water without the need for an aqueous solution in which the liquid fertilizer is dissolved.

  In carrying out the present invention, each of the above-described implementations of the configuration, shape, quantity, material, size, connection relationship, manufacturing method, etc. of the other parts of the nursery bed and other steps of the method of manufacturing the nursery bed It is not limited to examples. In addition, since the numerical value quoted in each embodiment of the present invention does not indicate a critical value but indicates a value suitable for implementation, even if the numerical value is slightly changed, the implementation is not denied. .

1,11,16 Nursery beds 1a, 11a, 16a Open holes 3 Coarsely pulverized wood powder 4 Finely pulverized wood powder 5 humus (compost)
6 Polyol resin 7 Isocyanate resin 9, 12, 17 Tray 10, 13, 18 Aqueous solution 14 Container 14a Pole hole 15 Pole 16A Small nursery bed P1, P2, P3, P4, P5 Plant

Claims (10)

A nursery bed containing finely pulverized wood flour, coarsely pulverized wood flour, humus and / or rice husk charcoal, and an organic synthetic resin binder,
The finely pulverized wood powder has an average particle diameter in the range of 30 μm to 500 μm, the coarsely pulverized wood powder has an average particle diameter in the range of 1 mm to 10 mm,
After mixing the with the finely divided wood flour and the coarse pulverized wood meal the leaf mold and / or chaff Kaorusumi and the organic synthetic resin binder in precision dispersing mixer, in the range of 30kg / cm ² ~100kg / cm ² at room temperature A nursery that is press-molded under the pressure of   The blending ratio is 100 parts by weight to 600 parts by weight of the coarsely pulverized wood powder, 75 parts by weight to 200 parts by weight of the husk and / or rice husk charcoal, and 100% by weight of the organic synthesis. The resin binder is 5 to 25 parts by weight with respect to a total of 100 parts by weight of the finely pulverized wood powder, the coarsely pulverized wood powder and the humus and / or rice husk charcoal. The nursery bed described.   The nursery bed according to claim 1 or 2, wherein the organic synthetic resin binder is an isocyanate resin, or a polyol resin and an isocyanate resin.   The nursery bed according to any one of claims 1 to 3, wherein the moisture content is in the range of 6% to 20%.   5. A shallow hole is drilled in one surface, plant seeds or bulbs are placed, and humus and / or rice husk charcoal and / or soil are covered. Nursery beds.   6. The thickness according to claim 1, wherein a thickness in a direction in which the pressure is applied is in a range of 5% to 50% of a length in a direction perpendicular to the direction. Nursery bed. A wood powder mixing step of mixing a finely pulverized wood powder having an average particle size of 30 μm to 500 μm with an organic synthetic resin binder to obtain a wood powder mixture;
A fine dispersion mixing step in which the coarsely pulverized wood powder and humus and / or rice husk charcoal having an average particle diameter of 1 mm to 10 mm are mixed with the wood powder mixture with a fine dispersion mixer to form a raw material mixture;
A press molding process by press molding, to nursery floor by applying a pressure within the range of 30kg / cm ² ~100kg / cm ² at room temperature filled with the raw material mixture into a press mold,
A method for producing a nursery bed, comprising:   The blending ratio is 100 parts by weight to 600 parts by weight of the coarsely pulverized wood powder, 75 parts by weight to 200 parts by weight of the husk and / or rice husk charcoal, and 100% by weight of the organic synthesis. The resin binder is 5 to 25 parts by weight based on 100 parts by weight of the total of the finely pulverized wood powder, the coarsely pulverized wood powder, the humus and / or rice husk charcoal. A method for producing the nursery bed as described.   The method for producing a nursery bed according to claim 7 or 8, wherein the organic synthetic resin binder is an isocyanate resin, or a polyol resin and an isocyanate resin.   The inner wall surface of the press mold is filled with a raw material mixture having a high proportion of the finely pulverized wood powder, and a raw material mixture having a high proportion of the coarsely pulverized wood powder is filled therein. The method for producing a nursery bed according to claim 9.

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