JP2010263815A - Rope containing fertilizer for seaweed culturing - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rope containing fertilizer for seaweed culturing, excellent in fertilizing effect and workability of installation, and facilitating taking out the fertilizer filled in the inside of the rope, and to provide a fertilizing method for the rope. <P>SOLUTION: This rope (A) containing the fertilizer for seaweed culturing is such that the fertilizer is filled in a hollow part of the rope having a hollow core part, the inner diameter is 20-60 mm, and the rope material comprises at least one kind selected from materials whose specific gravity is less than 1. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a seaweed culture fertilizer rope for promoting the growth of seaweed and preventing color fading and recovering color fading in seaweed aquaculture such as seaweed, seaweed, mozuku, and kombu. The present invention relates to a fertilizer rope for seaweed aquaculture that has good workability and can easily remove fertilizer residues and fill with fertilizer.

  In recent years, due to the deterioration of the marine environment, when cultivating seaweeds, it has become difficult to cultivate high-quality seaweed due to a decrease in nutrient salts in seawater. Therefore, a method of immersing the aquaculture net in the fertilizer solution or a method of dissolving the fertilizer and spraying it on the aquaculture net or seaweed aquaculture farm are partly adopted.

In particular, in nori culture, which is a large industry, the influence has remarkably occurred, and discoloration of nori is a big problem. The growth of nori is suppressed due to a decrease in nutrients (especially nitrogen and phosphorus components), and in severe cases, the color of the black nori may fade until it becomes white.
Recently, there is little rain during laver culture, and the amount of nutrient inflow from the river has decreased, so the period of discoloration has become earlier and the period has become longer. The discoloration occurs rapidly at a water temperature of 10 to 15 ° C., and the laver will die if it continues for one week. Therefore, it is necessary to apply fertilizer that restores color fading within a few days.

Conventionally, various fertilization methods have been studied in order to apply fertilizers necessary for the growth of laver. A method in which liquid fertilizer is diluted and sprayed in large quantities, and a method in which solid fertilizer and coated fertilizer are installed on a support for fixing a laver net have been implemented.
However, in these methods, since the solution is immediately diluted and diffused, a remarkable effect is not recognized. In the method of fixing fertilizer in a container, there is a problem that a load is applied partially and the aquaculture net and the aquaculture rope are cut. In addition, there is a problem that it is difficult to easily dispose of used containers and fertilizer residues, and even if they are used experimentally, they are not industrially adopted methods.

  On the other hand, as a method of fertilizing seaweeds such as seaweed culture, for example, a method using a rope-like material containing fertilizer (for example, refer to Patent Document 1), or a fertilizer in a mesh tube is divided into a large number by welding. There is known a fertilizer rope (see, for example, Patent Document 2) that promotes laver culture with fertilizer in each bag.

  However, these installation methods using fertilizer rope and fertilization tape are the methods of installation on the top of the laver net, and the laver that grows on the laver net disappears due to friction or partially sinks. As a result, there is a situation in which healthy growth cannot be achieved, and problems such as a sharp increase in weight and cutting of aquaculture nets occur, and the method cannot be used industrially. In addition, as in the present invention, no examination has been made from a comprehensive point of view such as raw materials, buoyancy, disposal methods, and fertilizers.

Therefore, at the time of seaweed cultivation, development of fertilization techniques and methods that are easy to fix to aquaculture nets, culture ropes, etc., float on the sea surface, and easy to install on the sea is eagerly desired. Moreover, in order to use a fertilizer-containing rope industrially, it is necessary to have a structure in which fertilizer can be easily put.
Furthermore, since it is necessary to separate and dispose of it when it is used in a disposable manner, it is important that the remaining debris can be easily removed from a container or the like, and it is also necessary to recycle it. It is also necessary to satisfy the requirement that the fertilizer filling operation must be easy.

Japanese Utility Model Laid-Open No. 61-74361 (Utility Model Registration Request, Examples, FIGS. 1 to 3) Japanese Utility Model Publication No. 60-33858 (Utility Model Registration Request, FIGS. 1 and 2)

  The present invention has been made in view of the above-mentioned problems and the present state of the art, and is intended to solve this problem. When cultivating seaweed, it can be easily installed on a farm with good workability and is easy to use. The purpose of the present invention is to provide a fertilizer-containing rope for seaweed cultivation that can be easily disposed of separately and can be easily recycled and used.

In order to solve the above-mentioned conventional problems and the like, the present inventors have intensively studied, and while filling the hollow portion of the rope having a hollow core portion with fertilizer, setting the diameter to a specific length, and The inventors have found that the rope with fertilizer for seaweed cultivation can be obtained by configuring the material of the rope from a specific material, and the present invention has been completed.
That is, the present invention resides in the following (1) to (5).
(1) The hollow portion of the rope having a hollow core portion is filled with fertilizer, the inner diameter is 20 to 60 mm, and the material of the rope is selected from one or more selected from materials having a specific gravity of less than 1. A rope containing fertilizer for seaweed culture, characterized by
(2) The rope with a fertilizer for seaweed cultivation according to the above (1), wherein the rope has a length of 7 to 25 m.
(3) The rope containing the fertilizer for seaweed cultivation according to (1) or (2) above, which is filled with a slow fertilizer having a diameter of 1 to 10 mm that elutes in seawater for 10 to 40 days.
(4) The rope containing the fertilizer for seaweed cultivation according to (3) above, wherein the slow fertilizer is a coated fertilizer.
(5) Fix the rope containing seaweed cultivation fertilizer according to any one of the above (4) to a seaweed cultivation net ear rope (end rope), a seaweed cultivation rope, or a rope fixing the seaweed cultivation net A method of fertilizing a rope containing a fertilizer for seaweed aquaculture.

  According to the present invention, the fertilizing effect is excellent, the workability of installation is excellent, and when it is used in a disposable manner, it can be easily disposed of separately, and the fertilizer can be taken out for recycling. A rope with a fertilizer for seaweed aquaculture that can be easily filled and a fertilizer application method therefor are provided.

(A) is a front view which shows an example of embodiment of the rope containing the fertilizer for seaweed cultivation of this invention, (b) is a cross-sectional view which shows the state with which the fertilizer is filled into the hollow part of the rope. It is a perspective view which shows an example of the use condition of the rope containing a fertilizer for seaweed cultivation comprised from the braided rope in a partial aspect. It is a perspective view which shows the other example of the usage condition of the rope containing a fertilizer for seaweed cultivation comprised from the braided rope in a partial aspect. It is a perspective view which shows an example of the use aspect at the time of filling the fertilizer in the case of recycling and repeatedly using the rope containing the fertilizer for seaweed cultivation of this invention. It is a partial front view which shows the other example of embodiment of the rope containing the fertilizer for seaweed cultivation of this invention. It is a top view which shows an example of the fertilization method in the floating fishing ground of a laver culture net using the rope with a fertilizer for seaweed culture of the present invention. It is a top view which shows the other example of the fertilization method in the floating fishing ground of a laver culture net using the rope with a fertilizer for seaweed cultivation of this invention. It is a front view which shows an example of the fertilization method in a seaweed culture fishing ground using the rope containing the fertilizer for seaweed of this invention. It is a perspective view which shows an example of the fertilization method in a mozuku culture fishing ground using the rope containing the fertilizer for seaweed of this invention.

Hereinafter, embodiments of the present invention will be described in detail.
The rope with fertilizer for seaweed cultivation of the present invention is a material in which the hollow portion of the rope having a hollow core portion is filled with fertilizer, the inner diameter is 20 to 60 mm, and the material of the rope has a specific gravity of less than 1. It consists of 1 or more types chosen from the inside.

FIG. 1: shows an example of embodiment of the rope containing the fertilizer for seaweed culture of this invention, (a) is a front view, (b) is the state by which the fertilizer is filled into the hollow part of the rope FIG.
The inner diameter R of the hollow portion of the rope A containing the fertilizer according to the present invention is 20 to 60 mm, and the structure is such that the fertilizer packed in the rope can be easily filled and taken out. When the inner diameter R of the rope A is less than 20 mm, it becomes difficult to fill and take out the fertilizer, and since the capacity of the fertilizer that can be filled is not sufficient, the fertilizing effect is weak. On the other hand, if the inner diameter R is larger than 60 mm, it becomes too heavy and installation becomes difficult, and it will sink in the sea, making it difficult to exert the effect of fertilization. Moreover, workability at the time of refilling also deteriorates.

  The length X of the rope A containing fertilizer is preferably set to 7 to 25 m from the viewpoint of installation workability, fertilizer filling property, and the like. By setting this length in the above range (7 to 25 m), it becomes easy to fill and take out the fertilizer into the rope, and it is excellent in installation workability at the fishing ground. When the length X of the rope is longer than 25 m, it becomes difficult to fill and take out the fertilizer. On the other hand, when the rope length is less than 7 m, the number of installed seaweed nets such as laver nets increases, so the installation workability in the fishing ground is poor. Become.

As a material of this rope A, what is necessary is just to be comprised from 1 or more types chosen from the raw materials used as specific gravity less than 1, for example, polyethylene (PE), polypropylene (PP), and the specific gravity which are less than 1, Examples include at least one type of ethylene-vinyl alcohol copolymer resin (EVOH) (each alone or a mixture of two or more types), polyethylene (PE), from the viewpoints of usability, economy, weight reduction, and buoyancy. Those composed of polypropylene (PP) are preferred. By configuring the material of the rope A containing fertilizer from one or more materials selected from materials with a specific gravity of less than 1, the burden on the seaweed net, such as a laver net at the time of installation, is reduced, and it floats on the sea surface. Can efficiently fertilize.
Note that the material of the rope A exceeds a specific gravity of 1, for example, a natural material (Manila hemp: specific gravity 1.45), polyamide (nylon: specific gravity 1.14), polyester (trade name “Tetron” specific gravity 1.38) , Polyvinyl alcohol (trade name “Cremona” specific gravity 1.30), polyvinyl chloride (polyvinyl chloride: specific gravity 1.37), polyvinylidene chloride (trade name “Kurehalon” specific gravity 1.7), aramid ( The effect of the present invention cannot be exhibited with a rope containing a fertilizer for seaweed aquaculture constructed such as trade name “Kevlar” specific gravity 1.44) and acrylic (specific gravity 1.14 to 1.17).

The rope having a hollow core portion used in the present invention may be manufactured by any method, but is preferably a braided rope from the viewpoint of economy and workability.
If this braided rope is used, the fertilizer can be filled while producing the braided cord, so that the manufacturing cost can be considerably reduced. In addition, the rope can be made the thinnest, leading to a reduction in the materials used.
The production of this braided rope is, for example, braided with a braiding machine using a strand 11 using monofilament yarns such as PE and PP having a specific gravity of less than 1 and multifilament yarn, and made into braided ropes. Can do.
Further, the fineness, mesh density, production method and the like of the strands can be suitably combined in consideration of the number of days (10 to 40 days) during which the fertilizer to be filled is eluted in the sea.

The fertilizer 10 filled in the hollow portion of the rope is not particularly limited as long as it is a fertilizer for seaweed,
Examples thereof include at least one kind such as a granular or rod-shaped solid fertilizer or a gel fertilizer. As fertilizer raw materials, ammonium fertilizer such as ammonium nitrate, ammonium nitrate lime, lime nitrogen, adjacent ammonium nitrate, adjacent ammonium nitrate, ammonium phosphate, sodium nitrate, ammonium chloride, urea etc. and sodium phosphate, potassium phosphate, ammonium phosphate, etc. Examples include phosphorus-containing substances.
Preferably, a slow-acting fertilizer having a particle diameter (diameter: maximum diameter) of 1 to 10 mm that elutes in seawater in 10 to 40 days is preferable from the viewpoint of filling, taking out workability, and fertilizing effect. By making the particle size of this fertilizer 1-10 mm, it does not leak from the mesh of a rope, but also takes in and out easily.

More preferably, it is preferable to use a coated fertilizer that is less susceptible to the influence of ocean currents and water temperature.
Any material that does not adversely affect the growth of seaweed can be used as the coating agent. For example, urethane resin, phenol resin, polyolefin resin, ethylene vinyl acetate copolymer, polyvinyl chloride resin, polyvinyl alcohol Although resin etc. are mentioned, it is not limited at all.
In the present invention, fertilizer filling, removal workability, further usability, economy, weight reduction, point of the rope material less than specific gravity 1 from the viewpoint of buoyancy, the length and inner diameter of the rope is limited, Considering the sustaining effect, the fertilizer filling amount is preferably 0.2 to 0.8 kg / m.

In the rope A containing fertilizer in the present invention, a structure of only a rope containing no fertilizer is preferably 0.3 to 3 m (Y in FIG. 1A) from both ends of the rope. A structure in which fertilizer does not come out by attaching a fastening member at a location of 0.3 to 3 m from the end of the rope. In this embodiment, a fastening member made of a resin tape such as vinyl tape is wound to stop and contain no fertilizer. It is preferable to form a rope end portion (Y portion in the figure). By using both ends of the rope as ropes (parts) containing no fertilizer, it is possible to facilitate attachment work to a laver net or the like.
FIG. 2 is a rope B containing fertilizer composed of a braided rope made of polyethylene (specific gravity 0.9) having a length of 12 m and an inner diameter of 25 mm, and a fastening member 20 made of vinyl tape is wound around a 0.5 m portion from the end of the rope. A rope end portion (Y portion) that does not contain weir and fertilizer is formed, and a fastening member 21 made of a vinyl tape for preventing fog is attached to the outermost end portion. In addition, the Z part in the figure is a part filled with fertilizer (gradual fertilizer).
FIG. 3 further shows that an additional connecting rope 30 is connected to an arbitrary portion of the rope end portion (Y portion) that does not contain fertilizer, thereby improving attachment workability to a laver net and the installation work. It may be applied firmly. Reference numeral 31 denotes a fastening member for preventing fog at the end of the connecting rope 30.

In the rope containing fertilizer for seaweed cultivation of the present invention, it is easy to fill and take out the fertilizer to the inside, and the fertilizer can be easily refilled. Therefore, the rope which is a fertilizer container can be used repeatedly and fertilization can be performed at low cost.
In general, ropes and fertilizer residues have different components, so they cannot be disposed of industrially unless they are separated. Since the rope containing the fertilizer for seaweed cultivation after use of the present invention can easily remove the fertilizer residue, the rope after use can be disposed as industrial waste. The rope part can also be used as a normal rope, and if the rope is made of a single material, it can be easily recycled to other products without disposal.

Moreover, when recycling and using the rope containing the fertilizer for seaweed cultivation of this invention repeatedly, it can carry out with the following method.
An example of filling fertilizer into rope C with a length of 12 m and an inner diameter of 25 mm is introduced. Filling the rope C, which is a fertilizer container, with fertilizer can be performed using an aluminum pipe 40 as shown in FIG. At this time, an aluminum pipe having a length of 2 m and a diameter of 25 mm was used.
First, the middle of the 12 m rope (6 m portion) is, for example, tightened with a string and divided into two (not shown). Attach half of the rope to a 2m pipe. Next, 1.25 kg of half of the fertilizer is put into the pipe by a funnel or the like. Hold this pipe vertically (vertical direction), drop the fertilizer while shifting the rope down from the pipe, and fill the rope with fertilizer. When the fertilizer is filled, the end of the rope and the portion 50 cm from the end are tightened with vinyl tape (see FIG. 2). The other side is filled with fertilizer in the same way. Thereby, a 12m fertilizer containing rope can be manufactured (reproduction).
By using the rope containing the fertilizer for seaweed cultivation of the present invention, the fertilizer can be taken out and filled easily. In addition, although the said filling method (procedure) is a thing about the case where it recycles and uses repeatedly, after manufacturing ropes, such as a braid, without filling a fertilizer, the said filling method is used also when filling a fertilizer. It can be used to manufacture a rope (new article) containing fertilizer for seaweed cultivation.

FIG. 5: is a partial front view which shows the other example of embodiment of the rope containing the fertilizer for seaweed cultivation of this invention.
The rope D with fertilizer for seaweed culture in this form is easy to attach to a laver net etc. FIG. 2 is composed of a braided rope made of polyethylene (specific gravity 0.9) 12 m in length and 25 mm in inner diameter. A fertilizer-containing rope B, which is attached with a fastening member made of a resin tape, which is a part of a rope only structure that does not contain fertilizer 0.3 to 3 m (Y in FIG. 5) from both ends of the rope. A display mark portion 35 is provided for easy.
As long as the display mark portion 35 is a display that can be understood at a glance, the display mode and the mounting mode are not particularly limited. For example, as the display / mounting mode, as shown in FIG. Display. In the case of recycling and reuse, the presence of the display mark portion 35 can further improve the fertilizer filling and attachment workability at the time of reuse.

A fertilization method in a seaweed farm such as seaweed, seaweed, mozuku, and kombu will be described in detail below using the rope with the fertilizer for seaweed cultivation of the present invention thus configured.
As a fertilizer application method of the rope containing fertilizer for seaweed cultivation, fertilization can be performed by using, for example, an ear rope (end rope) of a seaweed cultivation net, a rope for seaweed cultivation, or a rope for fixing a seaweed cultivation net.
FIG. 6: is a top view which shows an example of the fertilization method in the floating fishing ground of a laver culture net using the rope with a fertilizer for seaweed cultivation of this invention.
This embodiment is a fertilization method in which a rope 2 containing a fertilizer for seaweed cultivation is installed along the ear ropes of the laver culture net 1. In FIG. 6, 3 is an abatsuna, 4 is a float, and 5 is an ear thread portion of a laver net (a laver culture net).
FIG. 7: is a top view which shows the other example of the fertilization method in the floating fishing ground of a laver culture net using the rope with a fertilizer for seaweed cultivation of this invention.
This embodiment is a fertilization method in which a rope 1 containing seaweed culture fertilizer is installed along a rope (avatuna) 3 to be fixed to a nori culture net.

FIG. 8: is a front view which shows an example of the fertilization method in a seaweed culture fishing ground using the rope containing the fertilizer for seaweed culture of this invention.
This embodiment is a fertilization method in which the rope 2 containing fertilizer for seaweed is installed along the wakame culture rope 7. In FIG. 8, 6 is a seaweed to be cultivated, 8 is an anchor net, 9 is a concrete block to be anchored, and 10 is a sea surface (part).
FIG. 9: is a perspective view which shows an example of the fertilization method in a mozuku culture fishing ground using the rope with a seaweed fertilizer of this invention.
This embodiment is a fertilization method in which the rope 2 containing fertilizer for seaweed cultivation is installed along the ear rope of the mozuku culture net 11. In FIG. 9, 12 is a support | pillar.

  As described above, the rope with fertilizer for seaweed cultivation according to the present invention uses a material that has good handling at the seaweed farm, can be easily installed, and has a buoyancy and a specific gravity of less than 1. Therefore, the fertilizer rope can be installed without sinking, promoting the growth of seaweed and improving the color of seaweed. After use, the fertilizer residue can be easily taken out, and the rope after use can be reused as a normal tie rope. In addition, after the used rope is washed and dried, it can be filled with a new fertilizer and used as a fertilizer rope. As described above, by using the rope containing the fertilizer for seaweed cultivation of this patent, it is possible to provide a fertilizing method with good workability and low environmental load.

  Next, the present invention will be described in more detail with reference to test examples (Examples and Comparative Examples), but the present invention is not limited to the following Examples and the like.

(Test Example 1: Examples 1-2, Comparative Examples 1-2)
The inner diameter of a polyethylene braided rope having a specific gravity of 0.9 m and a length of 10 m is 10 to 80 mm, and a predetermined amount of coated fertilizer shown in Table 1 (particle size: 1 to 6 mm, fertilizer component: phosphorous ammonium nitrate, coating material: polyurethane, in seawater 4 ropes filled with fertilizer filled with 10 days of elution in the same manner are attached along both ears of laver culture net (width 1.6m, length 20m, Y portion 50cm) (see Fig. 6) Then, fertilizer was applied at the time when the laver was discolored, and the fertilizer effect, installation workability, and refilling workability of fertilizer were evaluated by the following evaluation methods.
The evaluation results are shown in Table 1 below.

(Method for evaluating fertilization effect)
The degree of blackness of the laver leaf bodies at the time when the laver was discolored was compared, and the fertilization effect was evaluated according to the following evaluation criteria.
Evaluation criteria: Is there any deterioration in color tone due to color fading?
○: Black laver leaves are considered to be black.
(Triangle | delta): The thing in which the color tone of a laver leaf body fell a little was made favorable.
X: A noble effect was obtained when the color tone of the laver leaf body was lowered and discolored.
(Installation workability evaluation method)
The workability when installing four fertilizer-containing ropes along the both ears of the laver culture net was compared, and the installation workability was evaluated according to the following evaluation criteria.
Evaluation criteria: Is there a problem with workability during installation?
○: No problem in workability.
Δ: Workability slightly decreased (30% or less), but usable.
X: Workability is greatly reduced (30% or more) and cannot be used.
(Method of evaluating fertilizer removal workability)
The workability when taking out the fertilizer from the dried used fertilizer rope was compared, and the workability was evaluated according to the following evaluation criteria.
Evaluation criteria: Is there a problem with the picking workability?
○: No problem in workability.
Δ: Workability slightly decreased (30% or less), but usable.
X: Workability is greatly reduced (30% or more) and cannot be used.

(Test Example 2: Examples 3-5, Comparative Examples 3-4)
Fertilizer filled with a coated fertilizer of a predetermined amount (filled with 0.25 kg per meter) as shown in Table 2 below, with a length of a polyethylene braided rope having an inner diameter of 30 mmφ and a specific gravity of 0.9 as 5 to 30 m (Y: 50 cm) Attach the incoming rope along the rope (Abatuna) that fixes the seaweed aquaculture net (see Fig. 7), fertilize the seaweed at the time of discoloration, and install the workability, work to remove the fertilizer, and the following evaluation The method was evaluated for manure refill workability.
These results are shown in Table 2 below.

(Evaluation method for workability of refilling fertilizer)
After removing the fertilizer from the dried spent fertilizer rope, the workability when filling with new fertilizer was compared, and the refill workability was evaluated according to the following evaluation criteria.
Evaluation criteria: Is there a problem with refillability?
○: No problem in workability.
Δ: Workability is slightly reduced (30% or less).
X: Workability is greatly reduced (30% or more).

(Test Example 3: Examples 6-7, Comparative Examples 5-6)
Four ropes containing fertilizer filled with 2.5 kg of coated fertilizer on a braided rope (Y: 50 cm) conforming to Fig. 1 with a length of 10 m and an inner diameter of 20 mmφ made of polyethylene, polypropylene, nylon, and vinyl chloride, respectively. It attached along the both ears thread part of an aquaculture net | network (width 1.6m, length 20m) (refer FIG. 6), fertilized at the time of discoloration of a laver, and evaluated the fertilization effect by the installation state and the said evaluation method.
These results are shown in Table 3 below.

  Summarizing the evaluation results in Tables 1 to 3 above, Examples 6 to 7 according to the present invention were compared to Comparative Examples 1 to 6 outside the present invention, and the workability for removing fertilizer, refilling work, and workability for installation. It was also found that the fertilizing effect was excellent.

  According to the present invention, fertilization in nori culture can be easily performed, and color loss of the nori can be prevented and recovered. The fertilizer filled inside the fertilizer rope can be easily taken out and recycled, it can be refilled easily, can be used many times, and fertilizer with excellent cost can be performed.

A Seaweed aquaculture fertilizer rope X Length of rope 10 Fertilizer (coated fertilizer)

Claims (5)

  Fertilizer is filled in the hollow portion of the rope whose core portion is hollow, the inner diameter is 20 to 60 mm, and the rope material is composed of one or more selected from materials whose specific gravity is less than 1. A characteristic rope with fertilizer for aquaculture.   The rope with a fertilizer for seaweed cultivation according to claim 1, wherein the rope has a length of 7 to 25 m.   The rope with a fertilizer for seaweed cultivation according to claim 1 or 2, wherein the rope is filled with a slow fertilizer having a diameter of 1 to 10 mm that elutes in seawater for 10 to 40 days.   The rope containing fertilizer for seaweed cultivation according to claim 3, wherein the slow fertilizer is a coated fertilizer.   Fixing a rope containing fertilizer for seaweed cultivation according to any one of claims 1 to 4 to a seaweed cultivation net ear rope (end rope), a seaweed aquaculture rope, or a rope fixing a seaweed aquaculture net A method of fertilizing a rope with fertilizer for seaweed culture, characterized by

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