JPH09308386A - Paper cylinder filled with molded culture medium for raising seedling - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light paper cylinder capable of saving labor for raising an transplanting seedlings and promoting growth of plants, excellent in handleability and useful for wet-rice, leaf vegetables, root vegetables, fruit vegetables, flower and ornament plants, etc., by filling an artificial and molded culture medium for raising seedling in a paper cylinder for raising seedlings. SOLUTION: This paper cylinder filled with a molded culture medium for raising seedlings is prepared by filling an artificial and molded culture medium for raising seedlings such as a foam, etc., of a urea resin or a phenol resin, having 0.01-0.20g/cm<3> bulk density, 0.50-5.00kgf/cm<2> shear penetration strength in a paper cylinder for raising seedlings to >=40% of the inside volume of the paper cylinder. It is preferably to raise plants by using the paper cylinder filled with the culture medium.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seedling-growing paper tube used for raising seedlings of plants such as paddy rice, leaf vegetables, root vegetables, fruit vegetables, and flowers, and is a lightweight and easy-to-handle artificial seedling-forming medium. It is characterized by being filled and sealed in a cylinder.

[0002]

2. Description of the Related Art Conventionally, in the case of growing transplanted seedlings using a seedling-raising paper tube, a folded paper tube (product name: paper pot manufactured by Nippon Sugar Beet Sugar Co., Ltd.) is expanded with a dedicated developing tool to form a honeycomb shape. The seedlings are fixed in a box-shaped container (seedling raising box) or the like, and filled with seedling growing medium. As the seedling medium, commercially available culture soil is used, or natural soil or culture soil is dried to an appropriate water-retaining state, and if necessary, sterilized and disinfected, and then sieved to remove soil soil. After preparing and adjusting the acidity, etc., it is mixed with the fertilizer for raising seedlings. After seeding in a paper cylinder filled with this seedling-growing medium, the prepared soil (mixed with a pesticide if necessary) is further covered therewith, and seedlings are grown for a certain period in a greenhouse or the like. The raised seedlings are carried to the main field in individual paper cylinders, and the paper cylinders are dissociated one by one or the paper cylinders connected in a chain are continuously planted by a transplanter or the like.

The conventional paper cylinder method is very convenient for storage and transportation because it is foldable and compact before being filled with soil. However, when the seedling raising work is started, the paper cylinder is unfolded, and the work of filling and sowing is progressed, but in recent years, as the aging of agricultural workers has progressed and decreased, it is in the social background, The conventional operation of deploying a paper cylinder is becoming a burden. Further, since soil is used as the seedling-growing medium, the weight of the seedlings in the seedling-raising box is heavy, which requires a great deal of labor to move and transport them. Further, it is not easy to secure soil, and it is not easy to always prepare soil having a constant composition and composition, which greatly hinders industrialization or mechanization of agriculture.

In the present state of the art, a seedling raising method using a lightweight artificial seedling-growing medium has been proposed mainly for the purpose of reducing labor.
-482887 and JP-A-54-153107.

In all of these, only the artificial seedling forming medium is used alone.
887 is a substitute for seedling cultivation soil using an artificial columnar shaped body, and since it is lightweight, it has an advantage of contributing to labor saving of cultivating farmers, but the seedling growing medium is damaged during mechanical transplantation work after seedling raising. It is easy, and the growth of the plant after transplanting is extremely poor.
Further, when the soil of the field is dry, the artificial seedling culture medium alone tends to absorb water, which may cause growth failure due to drying. On the other hand, in JP-A-54-153107, an artificial plastic floor material is pushed into a cultivation frame made of a hard synthetic resin to be molded into a predetermined shape and used for raising seedlings of plants. This cultivation frame has a bottom, and is intended to form a concave shape by a partition wall so that the roots of plants grow. The partition wall is relatively thin and has a sharp upper edge, but since the material is hard synthetic resin, it requires a thickness of at least 1500 microns, and when pushing the floor material into the cultivation frame, the floor material is Will be lost. Further, since the floor material is made of a plastic resin, an elastic layer such as a soft sponge has to be used for pressurizing during the filling operation.

[0006]

Although the prior art is certainly excellent, it is not yet perfect and further improvement is required. The present invention has been made in order to meet the demands in the industry as described above, and has been made for the purpose of newly developing an excellent seedling raising system that has never existed before.

[0007]

Means for Solving the Problems The present invention has been made in order to achieve the above-mentioned object, and as a result of diligent studies from various aspects, as a result of paying attention to the lightness of the artificial seedling-growing medium for the first time, When the seedling raising paper cylinder was filled, the soil used for raising seedlings was sufficient to cover with soil after sowing the artificial medium, and as a result, the seedling raising box containing the seedlings became lightweight and Easy to move and transport. Furthermore, since this artificial soil is covered with this paper cylinder, it is also possible to prevent the artificial soil from crushing and collapsing, and it is possible to achieve ideal plant seedling transplantation work without requiring much labor. Got The present invention was finally completed as a result of further studies based on this useful new finding.

That is, the basic technical idea of the present invention relates to a medium-enclosed paper cylinder obtained by enclosing an artificial molding medium for raising seedlings in a seedling-raising paper tube. Therefore, the present invention relates to a series of soil related to seedling raising using a paper tube. In the filling and seeding work process, the state before the seeding process is completed. That is, the process from the development of the paper cylinder to the filling process of the seedling growing medium is prepared in advance before the seedling raising work is started. It is also possible to prepare by filling the paper tube with the artificial seedling-forming medium in advance in the house.

As a result, it is possible to reduce the number of workers during a particularly busy seedling raising period, and at the time of transporting and handling the paper cylinder according to the present invention, it is lighter in weight than before, which saves labor. Even for weak elderly people and women, it becomes possible to carry out planting and transplanting work of plants smoothly and in a short time. Therefore, the present invention makes a great contribution to modern-day agriculture in Japan, which often bears the labor of older people and women.

Further, the seedlings raised by the present invention, when mechanically transplanted to this field, are protected from breaking by comparison with the conventional artificial seedling medium alone because the seedling culture medium is covered and protected by paper. The following advantages of the paper cylinder are included. (1) After transplanting the raised seedlings into a field, the seedling-growing medium and the soil outside are blocked by paper, so that the infestation of pests is prevented. (2) When the seedlings are transferred to a dry field, the movement of water from the well-maintained seedling culture medium into the dry soil is suppressed by the paper, and damage such as seedling death can be avoided. (3) The root shape at the seedling stage is important for root vegetables that use root as a product. The presence of paper keeps the root direction and shape good, but without paper, the root grows laterally,
When transplanted, it may be rooted or may become malformed during growth. (4) Since the seedling raising paper tube is made of paper, it decomposes in the soil and there is no room for pollution. Also,
The artificial molding medium for raising seedlings enclosed therein is also preferably selected and used as a material that decomposes and disintegrates by the time of harvesting the plant (generally about 3 months depending on the type of plant). Therefore, the medium-enclosed paper cylinder according to the present invention does not pollute the soil, prevents the occurrence of environmental pollution, and is excellent in safety.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION The molding medium used in the present invention may be any medium as long as it is made of a lightweight material suitable for plant raising and seedling, and it is made of inorganic fiber such as rock wool and ceramic fiber. Polymer foams are used as appropriate. In the latter case, foamed urea resin, foamed phenolic resin, etc. are exemplified.

The polymer foam is, for example, a foamed urea resin produced by introducing urea, a foaming agent and a solid agent solution, and compressed air into a urea-formaldehyde initial condensation solution to produce a foamed urea resin. It is also possible to manufacture and use this, or it is possible to use a commercial product. Examples of commercially available products include Himat (product name: Nissan Kagaku Kogyo Co., Ltd .: urea resin type), Oasis (product name: Smithers Oasis, USA: phenol resin type) and the like.
As the molding medium, it is preferable to use one that decomposes and decomposes by the time of harvesting the plant in order to prevent environmental pollution such as soil pollution.

As the paper tube used in the present invention, all types of paper containers can be used as long as they are paper containers used for raising seedlings, and various commercially available products such as commercially available seedling raising paper tubes can also be used. As a commercially available product, for example, a paper pot (trade name of Nippon Sugar Beet Sugar Co., Ltd.) can be used.
Hereinafter, the production of the medium-enclosed paper cylinder will be specifically described with reference to FIG. 1 using this paper pot as an example.

The paper pot is made of thin paper and is folded compactly, but when it is used, the paper pot has an upright and honeycomb three-dimensional structure ((B): perspective view of the unfolded paper tube). ). In the figure, (2) shows a paper tube and (3) shows a paper tube developing plate. A filling and enclosing plate (4) ((C): front view in which a medium is manually filled with a hard plate) such as a hard plate having no elasticity is used, or by using a roll or the like, the foam (1) (( (A): a perspective view of the molding medium) is pushed into the paper cylinder (2) and enclosed therein, so that the paper cylinder fixed with this foam ((D): a front view filled with the molding medium, (E)) : Front view of a paper cylinder filled and filled with molding medium)
Is formed. In the figure, (5) is a paper tube expansion stopper,
(6) shows the seeding space portion.

The medium-filled paper cylinder according to the present invention is formed in this way. By adopting such a manufacturing process, when the foam is pressed into the paper cylinder and sealed,
The upright thin paper acts as a cutting tooth that shears the foam. These teeth are as thin as 80 to 320 μm, and are 1/5 of the thickness of conventional hard synthetic resin, so that they are easily sheared and the loss of the foam is reduced. This encapsulation work mode may be a manual method or an automated mechanical method.

Next, the present invention will be described in more detail with reference to test examples, adaptation examples and examples.

[0017]

[Test Example 1] A paper cylinder CP303 (manufactured by Nippon Sugar Beet Sugar Co., Ltd., caliber 30 mm, height 30 mm, 264 booklet) was developed with dedicated props to a length of 275 mm, a width of 570 mm, and a height of 30 mm. Various seedling-growing media (280 mm in length, 580 mm in width, 25 mm in height) with different shear penetration strengths were placed thereon, and pressure was applied from above with a rigid, non-elastic thick plate to examine the suitability of the sealed and filled state. . The shear penetration strength of the medium was measured in order to express the state of filling and filling the paper cylinder. Rheometer (NRM-21) manufactured by Fudo Kogyo Co., Ltd.
10J type) was used, a compression test adapter having a diameter of 1.5 cm was attached, and the maximum value of the pressing force with which the molding medium was embedded was measured by this to obtain the shear penetration strength.

Table 1 shows the results. In addition, from Table 1, the invasion state of plant roots into the forming medium due to the difference in bulk density was investigated in the medium in the range where the state of being enclosed in the paper cylinder was good.
The results are shown in Table 2. From the above results, the bulk density is 0.01
.About.0.20 g / cm ³ , and shear penetration strength of 0.50 to 5.
00 kg. A molding medium plate for raising seedlings in the range of f / cm ² was suitable.

[0019]

[Table 1]

[0020]

[Table 2]

[0021]

[Application example 1: Filling range of artificial seedling forming medium in paper cylinder]
The filling range of the artificial seedling-forming medium in the paper cylinder is 40% or more with respect to the paper cylinder in order to maintain the expanded shape of the paper cylinder. Further, the covering soil on the medium is preferably 3 to 5 times the diameter of the seed, but depending on the plant, the covering soil may not be necessary. Table 3 shows an example of plant adaptation.

[0022]

[Table 3]

Each of the above-mentioned plants (turf (I), sugar beet (II),
A cross-sectional view of an adaptation example of green onions (III), paddy rice (IV), and corn (V)) is shown in FIG. 2, and an adaptation process is shown in FIG. In the figure, (a) is soil cover, (b) is seed, (c)
Is a culture medium, (d) is a paper cylinder, (e) is a molding media-enclosed paper cylinder,
(F) shows a nursery box, respectively. Further, in the figure, (I) shows an example of use when the filling rate is 100%.

[0024]

[Example 1] A paper cylinder CP303 (manufactured by Nippon Sugar Beet Sugar Co., Ltd., caliber 30 mm, height 30 mm, 264 booklet) was developed with a dedicated prop, and a phenol resin under the conditions determined to be appropriate in Test Example 1 was placed thereon. Seedling molding medium oasis of the foam system (trade name: Smithers Oasis, USA, 280 m long)
m, width 580 mm, height 25 mm) was placed and pressed from above with a thick plate. As a result, the paper cylinder was uniformly enclosed inside the paper cylinder CP303, and the paper cylinder was solidified in the expanded shape.

[0025]

Example 2 A paper cylinder CP303 filled with the molding medium prepared in Example 1 was used as a perforated seedling box for paddy rice (internal method 280 mm ×
The seeds were stored in 580 mm × 30 mm), and 3 seeds of green onion seeds (variety: Tohoku Tokita Seed Co., Ltd.) were sowed per pot, and then covered with soil, and both seedling boxes were subjected to hydroponics. For the hydroponic seedling method, a molded plastic water tank equipped with a water level control valve was used, and the water level of the nutrient solution was controlled so that the bottom surface of the molding medium contacted water during the germination stage. Then, after rooting from the germinated perforated nursery box, the water level was such that the root tip was always present in the nutrient solution.
During the seedling raising period, the nutrient solution temperature is 15 to 25 ° C, the pH is 6 to 7,
EC (electrical conductivity) was adjusted in the range of 1.5 to 2.0 ms / cm.

The dissolved oxygen in the culture solution was 6.6 ppm and 80% of the saturated state by the continuous circulation system. The composition of this culture solution was as follows throughout the period (unit: pp
m). N 60, P ₂ O ₅ 30, K ₂ O 120, Ca
O 40, MgO 20, Fe 2, B 0.5, Mn
0.05, Zn 0.01, Cu 0.01.

As a control example, a paper tube CP303 is similarly stored in a perforated nursery box for paddy rice and filled with green onion cultivation soil (manufactured by Nippon Beet Sugar Co., Ltd.) to produce green onion seeds (variety: Tono Tokita Seed Co., Ltd.). 3 seeds) were sowed, covered with soil, and water was sprinkled from above to carry out a conventional seedling raising method. As a result, according to the method of the present invention, the growing period up to a seedling in a suitable time for transplanting was shortened significantly compared to the conventional seedling growing method on the same seeding day. The paper tube CP303 filled with the seedling cultivation soil prepared in the same manner as in the control example was subjected to hydroponic seedlings, but the germination and the growth were extremely poor because it was always in a humid condition. The results are shown in Table 4.

[0028]

[Table 4]

[0029]

[Example 3] A paper cylinder CP303 having a water-soluble glue POVAL 205 (trade name: made by Kuraray Co., Ltd.) as a primary glue (a glue for laminating two base papers constituting a paper cylinder at a predetermined interval) is developed, and Urea resin type foam seedling molding medium high mat on top (product name: Nissan Chemical Industries, Ltd. 280 mm length,
(Width 580 mm, height 20 mm) is placed, and a thick plate is pressed from above to uniformly divide the paper into a paper cylinder CP303 by sealing and enclosing it, and the paper cylinder solidified in the expanded shape is used for paddy rice. The lettuce seeds (cultivar: Sacramento
(Takii Seedling Co., Ltd.) was sown for one grain, covered with soil, and provided for conventional seedlings.

Fertilization was carried out by sprinkling 2 l of a nutrient solution having the following concentration every 5 days per one box during irrigation (unit: ppm). N
200, P ₂ O ₅ 100, K ₂ O 100, CaO
40, MgO 20, Fe 2, B 0.5, Mn
0.05, Zn 0.01, Cu 0.01, Mo
0.01.

At the time of planting after raising the seedlings for 25 days, the water-soluble paste is easily peeled off by pulling the two papers with the paper cylinders attached to each other to the left and right, and the block seedlings are continuously pulled out, without the medium being collapsed. I was able to plant. After planting, there was no paper around the seedling block that hindered rooting, so the growth was extremely vigorous, and the harvesting period was 10 days earlier than the conventional paper seedlings, and the economic effect was high.

[0032]

EFFECTS OF THE INVENTION The seedling raising paper tube of the present invention comprises paddy rice, leaf vegetables,
It is used for raising seedlings of plants such as root vegetables, fruit vegetables and flowers, and is a conventional paper cylinder filled with a lightweight artificial seedling-forming medium. This is a paper cylinder that has the functions of both the paper cylinder and the artificial medium. By using this paper cylinder for raising seedlings, labor for raising seedlings and transplanting work can be saved as compared with the conventional paper cylinder + culture soil. In addition, the growth state of plants in the main field of seedlings using the paper tube of the present invention is more advantageous than the artificial seedling medium alone.

[Brief description of drawings]

FIG. 1 shows a manufacturing process of a medium-filled paper cylinder.

FIG. 2 shows a sectional view of an adaptation example.

FIG. 3 shows an adaptation process.

Claims (4)

[Claims] 1. A culture medium-enclosed paper cylinder comprising a seedling-raising paper cylinder in which an artificial molding medium for raising seedlings is enclosed. 2. A culture medium-enclosed paper cylinder, characterized in that 40% or more of the inner volume of the paper cylinder is filled with an artificial molding medium for raising seedlings in a seedling-raising paper cylinder. 3. The artificial molding medium for raising seedlings according to claim 1 or 2, has a bulk density of 0.01 to 0.20 g / cm ³ and a shear penetration strength of 0.50 to 5.00 kg · f / cm ^2. A culture medium-enclosed paper cylinder, which is a foam of urea resin or phenolic resin. 4. A method for raising seedlings of a plant, which comprises using the medium-enclosed paper cylinder according to any one of claims 1 to 3.