JP2002084905A - Fertilizer application vessel for laver culture and method for fertilizer application for laver culture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a porous fertilizer application vessel for laver culture having high durability, application ability both quick and delayed effectiveness, excellent laver reaping workability and capable of preventing laver net breakages. SOLUTION: This perforated fertilizer application vessel for laver culture to be attached to a laver culture site, laver culture net and/or bars for laver culture net is characterized by being 1-50% in perforation rate.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seaweed cultivation container and a seaweed cultivation fertilization method for increasing seedling raising and growth in a seaweed cultivation net and preventing discoloration.

[0002]

2. Description of the Related Art Conventionally, in order to improve the prevention of discoloration of laver cultivation, Japanese Unexamined Patent Application Publication No. 11-169001 discloses a laver cultivation laver for fertilization, in which a fertilizer is added to a laver for cultivating laver which has a fine hole. In addition, a lantern-shaped fertilizer container having a porous structure described in Utility Model Registration No. 306644 has been proposed.

[0003]

However, Japanese Patent Application Laid-Open No.
In the method described in Japanese Patent No. 169001, the fertilizing effect may not be sufficient, or the latter, Utility Model Registration No. 306
According to the method described in Japanese Patent No. 644, the fertilizing effect itself is better than the former, but the fertilizing effect becomes uneven, the structure of the container itself is poor, the workability of cutting the laver is deteriorated, and the winding of the laver net itself is reduced. It is difficult to take, break the net,
Problems such as breakage of the fertilizer container itself occur.

[0004] Therefore, it is an object of the present invention to provide a fertilizer container that solves these problems.
That is, the present invention is excellent in promoting growth and preventing discoloration at the time of raising seedlings, can provide a fast-acting, good-porosity fertilizer container that does not form spots, and can also cause cutting and breakage of the net and the porous fertilizer container. It is an object of the present invention to provide a fertilizer container for laver cultivation that is difficult to install and has excellent workability for mounting and refilling of fertilizer.

[0005]

The present invention has the following configuration to achieve the above object. That is, (1) In a porous fertilizer container attached to at least one of a laver cultivation field, a laver cultivation net, and a tine rod for a laver cultivation net, the opening ratio of the porous fertilizer container is 1 to 50%. A fertilizer container for laver cultivation, characterized in that:

(2) The fertilizer container for laver cultivation according to the above (1), wherein an open area ratio of the porous fertilizer container is 5 to 100%.

(3) The fertilizer container for laver cultivation according to (1) or (2), wherein at least one of the opposite sides of one hole of the porous fertilizer container is 2.5 mm or less. .

(4) The fertilizer container for laver cultivation according to any one of (1) to (3), wherein the porous fertilizer container is made of a thermoplastic resin.

(5) The nori cultivation product according to (4), wherein the thermoplastic resin comprises at least one selected from a polyolefin resin, a polyester resin, and a polyvinyl chloride resin. Fertilizer container.

(6) The fertilizer container for laver cultivation according to any one of (1) to (5), wherein the porous fertilizer container has a cylindrical shape.

(7) The fertilizer container for laver cultivation according to (6), wherein the outer diameter of the cylindrical shape is 50 mm or less.

(8) The fertilizer container for laver cultivation according to any one of (1) to (7), wherein a buoyant body is provided in a part of the porous fertilizer container.

(9) A material having a hardness lower than that of the fertilizer container and the nodules for the nori culture net is attached to at least both ends of the outer surface of the porous fertilizer container. The fertilizer container for laver cultivation according to any of (8).

(10) A fertilizing method for laver cultivation, wherein the fertilizer is applied using the fertilizer container for laver cultivation according to any one of (1) to (9).

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention relates to a porous fertilizer container attached to at least one of a laver farm, a laver farming net, and a drawer rod for a laver farming net, and the opening of the porous fertilizer container is provided. The ratio is 1 to 50%, preferably 5 to 30%. When the porosity is less than 1%, the fertilizing effect is not sufficient, and growth irregularities (length, color, root growth irregularities) are generated during seedling raising or discoloration. In addition, the porosity is 5
If it exceeds 0%, the rigidity of the porous fertilizer container itself will be lost and it will be easily damaged or deformed by wind waves,
It may cause poor installation with the shin stick and make it difficult to refill fertilizer.

In the present invention, it is preferable that the ratio of the open area of the porous fertilizer container is 5 to 100%.

The aperture area ratio in the present invention refers to the area of a portion where a hole described later is opened, and is determined by an evaluation method described later. The open area ratio is preferably 10% to 90%.
%, More preferably 10% to 80%.

When the open area ratio is less than 5%, not only the effect of fertilizing during seedling raising and the effect of preventing discoloration become insufficient, but also
Its immediate effect is also less effective. Further, by reducing the open area ratio to 100% or less, the strength of the porous fertilizer container is preferably improved.

The portion having the opening is desirably at or below the sea surface, and more preferably the center portion is substantially perpendicular to the sea surface. In the case of deviation from the vertical bottom, the side close to the opening part has sufficient fertilizing effect and color discoloration prevention effect, but the part on the opposite side is fertilizing effect,
The effect of preventing discoloration becomes difficult to appear, and as a result, unevenness of growth and unevenness of quality are likely to occur. If the aperture area ratio is large,
It may be placed on the sea surface, which is preferable because the fertilizer inside is eluted by waves.

The size of the pores of the porous fertilizer container according to the present invention is preferably such that at least one of the opposing sides has a diameter of 2.5 mm or less (in the case of a circular shape, the diameter). If the diameter exceeds 2.5 mm, a small-diameter solid fertilizer flows out, and the effect of the immediate effect portion is reduced, which is not preferable.

The distance between the holes in the longitudinal direction of the fertilizer container according to the present invention is not particularly limited, and may be different.

The shape of the porous fertilizer container in the present invention is as follows.
Any shape such as a bag shape, a tubular shape, a lantern shape, a net bag shape and the like may be used. More specifically, it may be a special shape as shown in Japanese Utility Model Registration No. 306644, but as another shape, a cross-sectional shape of a triangular, square, pentagonal, hexagonal or circular palanquin type Such as a cylindrical shape. Among them, those having a hexagonal shape or more and those having a circular shape are preferable, and those having a circular shape are more preferable because the windability of the nori net does not break the net due to wind waves and the fertilizer container itself is hardly damaged.

The length of the porous fertilizer container is 2.
0 to 0.1 m, preferably 1.5 m to 0.3 m, etc. is preferable because it is excellent in workability of refilling the fertilizer and workability of attaching to the tine. In addition, when the fertilizer is applied in the same amount if the length is too short, the number of attachments increases, and the workability deteriorates. If the number is small, problems such as the formation of fertilization spots occur.

The outer diameter (outer cross-sectional dimension) of the porous fertilizer container according to the present invention is not particularly limited, but the maximum part is preferably 50 mm or less, and 35 mm or less is the seaweed cutting performance. It is more preferable from the viewpoints of handleability, rigidity and the like.

The thickness of the porous fertilizer container of the present invention viewed from the cross section is preferably 1.0 to 5.0 mm,
3.5 mm is more preferable because of excellent rigidity, weather resistance, handleability and the like. Further, the thickness may be uniform, and spots may be formed within the range of the thickness. That is, it is possible to increase the rigidity in the circumferential direction by increasing the thickness in the longitudinal direction and increasing the rigidity in the longitudinal direction from the circumferential direction.

The shape of the hole of the porous fertilizer container may be any shape, but may be any shape such as a rectangle, a diamond, a circle, an ellipse, a hexagon, and a combination thereof.

This shape is not limited to being formed on the same plane, but may be a three-dimensional shape, that is, a shape formed by a plurality of overlaps in a cylindrical thickness direction (ie, a projected shape). However, it is preferable that the fertilizer is formed on the same surface because the fertilizer is less likely to be clogged.

The porous fertilizer container of the present invention is preferably made of a thermoplastic resin from the viewpoints of workability, weight reduction and the like.

The thermoplastic resin may be any of a polyolefin resin, a polyester resin, a polyvinyl chloride resin, a polyamide resin, and the like. In particular, polyolefin resins, polyester resins, and polyvinyl chloride resins are rigid, durable and processed. It is preferable from the viewpoint of properties. Also,
Other resins may be blended or copolymerized as long as the effects of the present invention are not impaired.

It is preferable to add an inorganic and / or organic weathering agent to the resin for the purpose of improving the weathering resistance.

Examples of the inorganic material include materials having a property of shielding sunlight, such as carbon black and titanium oxide.

The organic materials include a benzophenone-based ultraviolet absorber and a benzotriazole-based ultraviolet absorber.

The rigidity can be improved by adding glass fibers, inorganic particles or the like to the thermoplastic resin.

It is preferable that the porous fertilizer container of the present invention uses a foam at least in part thereof, and more preferably has an apparent specific gravity of 0.1 or less.

This foam prevents the fertilizer from being added to the porous fertilizer container, and is installed or removed from the sea, and can be prevented from submerging in the sea when the user accidentally leaves his hand, and the buoyancy can be adjusted. It is possible to adjust the amount of sinking in water. Further, when this buoyancy body is used for the end portion, a cap can be used instead.

At least at both ends of the outer surface of the porous fertilizer container of the present invention, a skin layer having a hardness lower than that of the fertilizer container (a resin or rubber having a lower hardness, or a foam having the same resin composition as that of the fertilizer container). It is preferable to have a skin layer having a thickness of 0.1 to 5 mmt. If this skin layer is not provided, the fertilizer can be attached to the fertilizer container and the traversing rod for laver nets, or to the rope.A sea wave or the like creates a gap between these mounting materials and the fertilizer container. This causes problems such as breaking the net.

At both ends of the porous fertilizer container of the present invention, caps having a structure in which fertilizer does not leak are provided, and the structure has a structure which also functions as the above-mentioned skin layer, a structure which also functions as a buoyant body,
A structure in which a cap is provided separately from the skin layer, and the cap may be a double cap. In the present invention, a cap structure provided separately from a skin layer that can be opened and closed while being fixed is preferable because the cap structure is excellent in workability because the cap layer is fixed to a tine or a rope or the like. This cap may have a mesh shape or a structure without holes as long as the fertilizer does not leak.

When providing a cap separate from the skin layer
It is preferable to make it smaller than the outer dimensions of the fertilizer container including the skin layer. The protrusion length is 30 mm or less, preferably 2 mm.
0 mm or less, more preferably 10 mm or less is preferred from the viewpoint of preventing breakage of the net.

When the outer layer and the separate cap have a double structure, the outer layer may have the same size as the outer diameter of the skin layer, but the inner side cap is preferably smaller than the outer diameter of the skin layer. Further, the protrusion length is preferably 30 mm or less, preferably 20 mm or less, more preferably 10 mm or less, from the viewpoint of preventing breakage of the net.

In addition, it is preferable that all the caps have an R, and those having an R on the entire cap, only those having only corners, and the like are preferable from the viewpoint of preventing breakage of the net.

In the case of a foam cap which also functions as a buoyant material, a projecting portion is provided, and the outside dimension of the projecting portion is made larger (thicker) than that of the porous fertilizer container, thereby eliminating the gap between the tine rod and the porous fertilizer container. This is preferable because the nori net does not enter this gap and the net can be prevented from being broken.

The method of attaching the fertilizer rod, rope, etc. to the porous fertilizer container may be any method such as a method of tying it with an insulator or a method of stopping it with a single touch with a resin molded product.

When a porous fertilizer container is attached to this tine rod for laver cultivation, ± 45 degrees from the horizontal in the direction in which the ear rope is attached.
It is preferable to attach it in the range of degrees, more preferably +
The range of 30 degrees to -45 degrees is preferable because the fertilizing effect becomes remarkable. The-(minus) here is the direction of sinking in the sea,
+ Represents the opposite direction.

Further, the porous fertilizer container can be installed at any place of the laver farm. Nori farm is a place where nori is cultivated.
It is a place for culturing (called one frame) in which about ten laver cultivation nets are stretched together, and in the present invention, it is installed at any place of this laver cultivation site.

In addition, the porous fertilizer container is attached to any place of the laver farm, or is attached to the laver culture net, is attached to a nodule for the laver culture net, or is a net other than the culture net, or is cultured. A rope can be attached to the top of the net and attached to the rope. Alternatively, it can be attached to both the seaweed cultivation net and the shin stick for the seaweed cultivation net.

Further, a method may be used in which two ropes different from the laver net are passed through the vicinity of the end of the fertilizer container and attached thereto. This method is preferable because it is easy to remove the seaweed in the seaweed cutting operation, and even if it is attached, it is separated from the seaweed net and has excellent workability.

Next, the manufacturing method of the present invention will be described, but the present invention is not necessarily limited thereto. First, a thermoplastic resin is supplied to a hopper of an extruder, heated to a temperature equal to or higher than the melting point and extruded from a cylindrical die. As described in JP-A-60-141500, a pipe-type cutter of the present invention is applied to a pipe. A hole is formed in a shape having a porosity.

In the case of this punch type cutter, there is a method in which the cutting is performed from the inside of the pipe and from the outside.

The size of the holes and the porosity can be achieved by changing the size of the punch. Also, the shape of the holes can be changed by the draft ratio in this extrusion.

As another method, the thermoplastic resin is extruded linearly, and the linear polymer exiting from the inner cylinder of the die and the linear polymer exiting from the outer cylinder are alternately arranged. There is also a method in which the linear polymer is entangled by rotation.

(Evaluation Method) (1) Opening Ratio A constant area S and an area S1 of all the pores contained therein were determined and calculated by the following equation. (S1 / S) × 100 = Aperture ratio (%) For a complex shape, a part was cut out and projected, and the area was obtained from the weight (a calibration curve of the relationship between weight and area was created in advance). Keep it).

(2) Perforated area ratio The cross-sectional peripheral length L1 of the fertilizer container and the length L2 of the fertilizer container are multiplied to obtain an area (T1). The area (T2) obtained by multiplying the fertilizer container length l2 of the portion where the fertilizer was applied was determined by the following equation. This T was expressed as a hole area ratio. (T2 / T1) × 100 = T (%)

(3) Shape of Hole The smallest part of the opposing sides was measured with a vernier caliper.

(4) Hardness The hardness was measured with a Shore hardness meter (according to ASTM D2240).

(5) Effect of fertilization The fertilizer application was compared and evaluated during the seedling raising and discoloration stages. ：: Raising seedling: The growth of seedlings and those with a large number of roots were better than those without fertilization. Discoloration period: A product without deterioration in quality and yield due to discoloration was evaluated as good. Δ: Seedling growth period: Growth of seedlings slightly increased compared to no fertilization, and the number of roots was slightly good. Discoloration period: Due to discoloration, slightly quality compared to no fertilization,
Those with a small decrease in the yield were rated as slightly better. ×: Seedling raising period: No effect was observed when the growth of seedlings and the number of roots did not change as compared to the case without fertilization. Discoloration period: The quality and yield have clearly decreased due to discoloration.

(6) Fast-acting performance In a laver farm, evaluation was made in the same farm so that Comparative Examples and Examples could be compared. The fertilization effect was evaluated based on the growth (number and length) of the roots, the degree of blackness of the color, the length, and the degree of gloss of the dried laver. ：: Fertilizing effect was observed in about 1 to 3 days during the seedling raising and discoloration stages. Δ: It took 3 days or more, but improvement was observed as compared with no fertilization. ×: No change with no fertilization.

(7) Nori growth spots Comparative examples and examples were simultaneously used and evaluated for comparison. The growth spots (growth density, length, and color of nori) were evaluated and expressed as follows. O: Almost no growth spots were observed. Δ: Some growth spots were observed, but no problem. X: Observation of growth spots was observed, resulting in a decrease in yield and quality.

(8) Weather Resistance Evaluation was made based on the appearance change after 1000 hours of sunshine weather meter. Generally, the color fading starts before the change in strength and elongation, so this change was evaluated.

(9) Deformation of Container Evaluation was made on the deformed state after one month at sea. ：: Almost no deformation was observed. Δ: slight deformation is observed, but there is no problem in use. ×: Difficult to use due to large deformation

(10) Handling workability The workability was evaluated in terms of poor installation and fertilizer refilling workability. ：: No problem in workability. Δ: Workability is slightly reduced (30% or less) but usable. ×: Workability is greatly reduced due to deformation (more than 30%)
And was marked as unusable.

[0061]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to embodiments. Comparative Example 1 A polypropylene resin (M) was added to an extruder heated to 280 ° C.
I = 1.0) and a raw material in which 5 wt% of carbon black is added, and a maximum outer diameter of 32 mmφ, a minimum inner diameter of 25 mmφ, and a method described in JP-A-60-141500.
A 1000 mmL pipe-shaped rectangular hole (2.0 ×
2.5 mm) and a 0.5% open area porous pipe was obtained. 25mmφ length 60mmL at both ends of this pipe
Was filled with a foam having cylindrical closed cells. A porous fertilizer container having caps made of soft polyvinyl chloride attached to both ends of the pipe was obtained. The fertilizer container was filled with 500 g of the coated granular fertilizer.

Examples 1 to 5 and Comparative Example 2 In the same manner as in Comparative Example 1, the hole size was fixed, and the opening ratio was 1% (Example 1), 5% (Example 2), 15% (Example 2). Example 3), 30% (Example 4), 50% (Example 5),
60% (Comparative Example 2).

Comparative Example 3 The porous fertilizer container of the present invention was not used, that is, it was cultured by the conventional laver culture method. Table 1 shows the evaluation results. As a result, by using a porous fertilizer container having an opening ratio in the range of 1 to 50%, it is possible to obtain a good porous fertilizer container which is excellent in growth promotion and discoloration prevention at the time of raising seedlings, has quick action, and does not form spots. In addition, a fertilizer container for laver cultivation was obtained, which was less likely to cause reaping work, breakage of the net and the porous fertilizer container, and was excellent in installation properties and fertilizer refilling workability.

[0064]

[Table 1]

[0065]

Industrial Applicability The fertilizer container for laver nets of the present invention is excellent in promoting growth and preventing discoloration at the time of raising seedlings, and can provide a fast-acting, good-porosity fertilizer container which does not form spots, and also has a cutting workability and a net. And it is hard to cause breakage of the fertilizer container and the porous fertilizer application, and it is also excellent in installation property and workability of refilling fertilizer.

 ────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor Kazuhiko Okuzono 1850 Masunaga, Arao-shi, Kumamoto Dai-ichi Seikatsu Co., Ltd. F-term (reference) 2B026 AA01 AC01 AF04 EA01 EB01

Claims (10)

[Claims] 1. A porous fertilizer container attached to at least one of a laver cultivation field, a laver cultivation net, and a tine rod for a laver cultivation net, wherein the porosity of the porous fertilizer container is 1 to 5.
A fertilizer container for laver cultivation characterized by being 0%. 2. The porous fertilizer container has an open area ratio of 5-1.
The fertilizer container for laver cultivation according to claim 1, wherein the fertilizer is 00%. 3. The fertilizer container for laver cultivation according to claim 1, wherein at least one of the opposite sides of one hole of the porous fertilizer container is 2.5 mm or less. 4. The fertilizer container for laver culture according to claim 1, wherein the porous fertilizer container is made of a thermoplastic resin. 5. The fertilizer container for laver cultivation according to claim 4, wherein the thermoplastic resin comprises at least one selected from a polyolefin resin, a polyester resin, and a polyvinyl chloride resin. . 6. The fertilizer container for laver cultivation according to claim 1, wherein said porous fertilizer container has a cylindrical shape. 7. The fertilizer container for laver cultivation according to claim 6, wherein the outer diameter of the cylindrical shape is 50 mm or less. 8. The fertilizer container for laver cultivation according to claim 1, wherein a buoyant body is provided in a part of the porous fertilizer container. 9. The fertilizer container according to claim 1, wherein a material having a hardness lower than that of the fertilizer container and a nodling rod for a nori culture net is attached to at least both ends of the outer surface of the porous fertilizer container. A fertilizer container for laver culture according to any one of the above. 10. A fertilizing method for laver cultivation, comprising using the fertilizer container for laver cultivation according to any one of claims 1 to 9.