JPH104798A - Seedling raising container of fibrous material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seedling raising container of fibrous material excellent in water retention characteristics, air permeability, drain properties, environmental pollution resistance and rooting ability of root after transplantation, by blending inorganic fibers with cellulosic fibers and adding a paper-strengthening agent to the blend to constitute a fibrous material. SOLUTION: This seedling raising container 1 of fibrous material is obtained by blending inorganic fibers such as rock wool or glass wool with organic fibers such as cellulosic fibers and adding preferably 0.01-5.0 pts.wt. (based on 100 pts.wt. of the whole fibers) of a paper-strengthening agent such as acrylamide to the blend. The seedling raising container 1 of fibrous material consists of container bodies 2, upper open hole parts 3 and wall faces 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fibrous seedling raising container, and more particularly to a fibrous raising seedling container comprising a fibrous material.
The present invention relates to a fibrous seedling container having excellent growth of seedlings and survival of roots after transplantation.

[0002]

2. Description of the Related Art Conventionally, a seedling raising container for sowing and cutting a plant seedling of a plant has been adopted for the purpose of seed propagation and vegetative propagation. Normally, this seedling raising container has, in appearance, one or more truncated pyramidal or truncated conical shaped containers each having a large upper opening area or a plurality of containers each having an upper opening portion connected in a plate shape. It consists of a body.

[0003] As a seedling container having such a configuration, a plastic container is known. The plastic nursery container has advantages such as simplicity of manufacture, easy handling, and low price, but has the following disadvantages. After a suitable transplant period, when the roots extend along the wall surface of the container body and have no gaps, so-called "pot band" state, the roots are in an oxygen-deficient state, and plant growth stops. Seedlings in which the above-mentioned pot band is raised grow slowly because the roots cannot be straightened into the soil after transplantation, which has an adverse effect on the subsequent growth and yield. The rhizosphere is confined within the container, the time for transplantation is short, and the time of transplantation is limited. Since it is made of plastic, it is not possible to transplant the whole container, and it is necessary to extract seedlings from each container. This requires a lot of labor and the container is waste.

[0004] For example, Japanese Patent Application Laid-Open No. Hei 4-183307 discloses a technique for producing a fibrous seedling container composed of wood pulp, jute pulp, and inorganic fibers such as glass fiber and rock wool fiber. Is disclosed. According to this technology, pulp is decomposed by microorganisms in the soil, and inorganic fibers such as glass fiber and rock wool fiber are also weathered and decomposed in the soil, so that the container disappears in the soil. There is no need to extract seedlings and no need to collect them.

[0005]

However, the fibrous material having the above structure has a low strength, and it is necessary to increase the density by pressing to maintain the shape of the fibrous seedling container. The porosity of the seedling raising container is reduced, water retention, air permeability, and drainage are poor, and elongation of the root from the wall surface or the lower surface of the container body to the outside is inhibited.

[0006] The present invention has been made to solve such problems, and has as its main object to provide a fibrous seedling container having excellent growth of seedlings and excellent root vigor after transplantation. I have.

[0007]

Means for Solving the Problems In order to achieve the above object, a fibrous seedling raising container according to the first invention of the present invention comprises mixing inorganic fibers such as rock wool and glass wool with organic fibers of cellulosic fibers, It is characterized by comprising a fibrous material to which a paper strength enhancer is added.

[0008] The fibrous seedling raising container of the second invention is characterized in that the paper strength enhancer is added in an amount of 0.01 to 5.0 parts by weight based on 100 parts by weight of the total fibers.

[0009]

According to the fibrous seedling raising container of the present invention, the use of the paper-strengthening agent makes it possible to reduce the density of the fibrous material constituting each container body and increase the porosity. In addition, the air permeability and drainage are improved, and the roots of the seedlings grown in the container can easily extend from the wall surface or lower surface of the container to the outside, thereby preventing oxygen deficiency and pot banding. Furthermore, by the extension of the container body of the root to the outside, the strength of the container body is reduced, disintegration after transplantation becomes easy, the extension of the root into the soil is not hindered, and the root survival after transplantation becomes good, In addition, the decomposition and weathering action of the fibrous material of the container body in the soil is promoted.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described with reference to the drawings. FIG. 1 is a partially omitted perspective view showing a fibrous seedling container of the present invention, and FIG. 2 is an explanatory view showing a growing state of a seedling.

The integrated fibrous seedling raising container 1 has a generally inverted truncated quadrangular pyramid-shaped unitary container 2, 2 having a well-known shape.
Are integrally connected. This container 2,
An upper opening 3 is formed on the upper surface of each of the 2,..., And the upper opening 3 is connected in a plate shape as shown in the figure. In the figure, 4
Is a wall surface of the container 2. Although not shown, the container 2 may be configured as a single container 2 and used individually.

The fibrous seedling raising container 1 having the above structure is formed from inorganic fibers such as rock wool and glass wool, organic fibers such as pulp and waste paper and organic fibers such as waste paper, and a paper strength enhancer. Depending on the purpose, rayon, polyester, acrylic fiber, or the like may be added to reduce the density and facilitate the extension from the wall surface 4 or the lower surface of the root container 2 to the outside.

Next, the fibrous growth seedling container 1 of the present invention will be specifically described. Pulp, cellulosic fibers such as waste paper,
In addition, depending on the purpose, a predetermined amount of organic fibers composed of synthetic fibers such as rayon, polyester, and acrylic fibers are measured and defibrated with a pulper. On the other hand, inorganic fibers such as rock wool and glass wool and the defibrated organic fibers are mixed with a pulper or a chest, and a binder such as a cationic, anionic, nonionic or acrylic paper strength enhancer is used as a binder. Solid content based on 100 parts by weight of fiber
0.01 to 5.0 parts by weight are added, and the slurry concentration is 0.05 to 10.
0%. If the slurry concentration is less than 0.05%,
Large amounts of slurry are required to deposit the fibrous material to a thickness of 2.0 mm, making it impractical. On the other hand, if it exceeds 10.0%, it will be thickly deposited and the surface finish will be poor.

Regarding the amount of the paper strength enhancer added, if it is less than 0.01 parts by weight, there is no adhesive effect, and if it exceeds 5.0 parts by weight, it is hardly adhered and water repellency is generated, so that the root elongation is increased. Insufficient moisture is required in the fibrous material to allow the roots to extend outside the container. In addition, decomposition and weathering in the soil are delayed, which is not preferable as a container for fibrous seedlings.
A binder such as acryl amide which does not have self-fixing property to the fibers is prepared by adding a fixing agent such as aluminum sulfate in the slurry to 0.1 to 10 parts by weight based on 100 parts by weight of the total fibers.
Add 0 parts by weight and fix.

Further, to reduce the density of the fibrous seedling raising container, a polymer coagulant is added to the slurry in an amount of 0.01 to 1.0 part by weight as a solid content based on 100 parts by weight of all the fibers, and the slurry is coagulated. Density can be reduced. Addition of less than 0.01 part by weight has no coagulation effect, and addition of more than 1.0 part by weight does not change the coagulation effect. In the case where a fixing agent such as aluminum sulfate is added, the slurry is neutralized before adding the polymer flocculant.

The slurry obtained in this manner is suction-molded under reduced pressure using a gas-permeable mold having a wire mesh stretched over a molding material, and the fibrous material is placed on the wire mesh of the gas-permeable mold at 1. 0 to
Deposit to a thickness of 2.0 mm.

Subsequently, the moisture of the sediment of the slurry is sucked, and the fibrous material is released from the wire mesh of the air-permeable molding die. By drying in the sun, the container of the present invention is obtained. The density of the fibrous seedling raising container of the present invention is 150 to 250.
kg / m ³ is preferred. If it is less than 150 kg / m ³ , shape retention is difficult and water retention is poor. If it exceeds 250 kg / m ³ , water retention, air permeability and drainage are poor.

Table 1 shows the composition, physical properties and results of the seedling raising test of the examples and comparative examples of the fibrous seedling growing containers carried out by the inventors of the present invention.

[0019]

[Table 1]

Example 1 Water was added to 75 parts by weight of rock wool and 25 parts by weight of pulp, and the mixture was defibrated with a pulper. To this, 0.05 parts by weight of a cationic polyamide resin as a paper-strengthening agent was added. Adjust the slurry concentration to 0.2% in the chest. The slurry obtained in this way is suction-molded under reduced pressure using a gas-permeable mold, a fibrous material is deposited on a wire mesh of the mold, and then the mold is pulled up from the slurry to suck moisture. And then demolded and dried to a thickness of 1.8 mm and a density of 220 kg / m ³
Was obtained.

Example 2 A fiber-growing container having a thickness of 1.6 mm and a density of 235 kg / m ^{3 was} prepared in the same manner as in Example 1 except that 25 parts by weight of waste paper was used in place of the pulp of Example 1. Obtained. Example 3 A fibrous seedling container having a thickness of 2.0 mm and a density of 180 kg / m ³ was obtained in the same manner as in Example 1, except that 75 parts by weight of glass wool was used instead of the rock wool of Example 1. . Example 4 The procedure of Example 1 was repeated, except that 0.2 parts by weight of guar gum was used in place of the cationic polyamide resin used as the paper-strengthening agent.
An m ³ fibrous seedling raising container was obtained. Example 5 37 parts by weight of rock wool, 37 parts by weight of glass wool, 26 parts by weight of pulp, and 0.2 part by weight of a cationic polyamide resin as a paper-strengthening agent were used to produce a layer having a thickness of 1. A fiber-growing seedling container having a thickness of 9 mm and a density of 195 kg / m ³ was obtained. Example 6 Rock wool 75 parts by weight, pulp 12 parts by weight, rayon 13 parts by weight, paper strength enhancer (acrylamide) 1.8 parts by weight, fixing agent (aluminum sulfate) 3.0 parts by weight, pH adjuster (ammonia) A fibrous seedling container having a thickness of 2.0 mm and a density of 200 kg / m ³ was obtained in the same manner as in Example 1 by using an appropriate amount of 0.1 part by weight of the polymer flocculant.

Comparative Example 1 Water was added to 75 parts by weight of rock wool and 25 parts by weight of pulp, and the mixture was defibrated with a pulper. The slurry concentration in the chest was adjusted to 0.2%. The slurry obtained in this way is suction-molded under reduced pressure using a gas-permeable mold, a fibrous material is deposited on a wire mesh of the mold, and then the mold is pulled up from the slurry to remove water. Suction, demolding, hot press in a semi-dry state and press molding,
After drying, a fiber-growing seedling container having a thickness of 2.1 mm and a density of 330 kg / m ³ was obtained. Comparative Example 2 A 1.9 mm thick sheet having a density of 3 was prepared in the same manner as in Comparative Example 1 except that 25 parts by weight of waste paper was used in place of the pulp of Comparative Example 1.
A 53 kg / m ³ fibrous seedling raising container was obtained. Comparative Example 3 The same method as in Comparative Example 1 was repeated except that 75 parts by weight of glass wool was used instead of the rock wool of Comparative Example 1.
A fiber-growing seedling container having a thickness of 2.0 mm and a density of 264 kg / m ³ was obtained.

The seedlings of tomato and marigold were sown in a fibrous seedling container of each of the examples and comparative examples, and a seedling of tomato and marigold was sowed and a seedling test was carried out. The results are as shown in Table 1. In the seedling test of tomato and marigold, in each example, the number of roots protruding outside of the container at 50 days after sowing was larger than that in each comparative example, and the container after transplanting in each example was larger than that in each comparative example. Is also shorter than in each comparative example. This indicates that the pot band is less likely to occur in each of the examples than the comparative examples, the container collapses quickly, the roots take root well after transplantation, and good growth can be achieved.

As described above, according to the fibrous seedling container of the present invention, inorganic fibers and organic fibers are mixed, and a paper strength enhancer is added in an amount of 0.1 to 5.0 parts by weight based on 100 parts by weight of all fibers. Therefore, the density of the fibrous material constituting the container body 2 can be set to 150 to 250 kg / m ³ , the porosity is increased, and as a result, the water retention, ventilation, and drainage are excellent. Thus, the strength is such that the root can easily pass through the wall surface 4 or the lower surface of the container body 2. For this reason, the root can easily extend from the wall surface 4 or the lower surface of the container body 2 to the outside, and the oxygen deficiency and the pot band state can be solved. In addition, the root elongates to the outside,
The strength of the container 2 is reduced, and disintegration after transplantation is promoted.

[0025]

The fibrous seedling raising container of the present invention has the following effects as compared with the conventional fibrous raising seedling container. The container itself has the strength, density, and porosity through which the root can easily pass, and is excellent in water retention, air permeability, and drainage, so that the root grows well and can easily extend from the wall or lower surface of the container to the outside. In addition, oxygen deficiency and pot band can be prevented, and roots after transplanting are excellent in root survival and good growth can be achieved. When the root extends to the outside of the container, the strength of the wall surface of the container decreases, and the collapse of the container after transplantation is promoted. Since the roots can be extended to the outside of the container body, the time for transplantation can be extended, and there is ample time for transplantation. The container body collapses due to the extension of the root container outside, the organic fiber is decomposed by soil microorganisms, and the inorganic fiber also weathers and decomposes in the soil, so the container disappears in the soil,
There is no need for collection.

[Brief description of the drawings]

FIG. 1 is a partially omitted perspective view showing a fibrous seedling raising container of the present invention.

FIG. 2 is an explanatory diagram showing a growing state of a seedling.

[Explanation of symbols]

 1 container for fibrous seedling 2 container

Claims (2)

[Claims] 1. A fibrous seedling container comprising a fibrous material obtained by mixing inorganic fibers such as rock wool and glass wool with organic fibers of cellulosic fibers and adding a paper strength enhancer. 2. The container according to claim 1, wherein the paper strength enhancer is added in an amount of 0.01 to 5.0 parts by weight based on 100 parts by weight of the total fibers.