JP3355072B2 - Weed control method and weed control bag used for it - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a weed control method used for controlling weeds in a forestry (forest raising) field and the like, and a weed control bag used therefor.

[0002]

2. Description of the Related Art Among the nursery work for tree-planting, under-cutting work for cutting weeds growing between plantations in afforestation sites in the summer is particularly heavy labor. This is the main cause of the increase. In addition, in view of the aging of workers in the forest industry and the chronic shortage of labor due to a shortage of successors, labor saving of undercutting work is strongly desired.

[0003] In order to suppress the growth of weeds,
For example, the following method is being studied. In this method, as shown in FIG. 7, a thick synthetic fiber nonwoven sheet 20 cut to a predetermined size is laid between plants to shield the ground surface from sunlight, so that the nonwoven sheet 20 This is a method to suppress the growth of the lower weeds.

[0004]

However, in the above-mentioned weed control method, the nonwoven fabric sheet 20 is easily blown or rolled by wind or the like, and it is necessary to prevent this. It has to be held down with a stake or the like, and the operation is extremely complicated. In addition, when a thick nonwoven fabric sheet 20 is used to prevent the nonwoven fabric from being turned up, if there is unevenness or foreign matter in the installation location, as shown in FIG. 8, the nonwoven fabric sheet 20 does not follow the ground unevenness or foreign matter shape, and a gap is generated. ,
There is a problem that weeds grow from gaps due to incomplete shading.

[0005] Furthermore, recently, there has been a demand for effective treatment of a large amount of branch waste generated by pruning using a high-performance forestry machine. As a countermeasure, a chipper that automatically turns the branches into chips has been developed.

The present invention has been made in view of such circumstances, and is easy to install in a forested area, etc., has a high herbicidal effect by blocking sunlight, and has an effect of branch waste generated by pruning. It is an object of the present invention to provide a herbicidal method capable of realizing a natural treatment and a herbicidal bag used therefor.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a square bag-like portion and a fin extending at least on two adjacent edges of the bag-like portion over the entire length of each side. A plurality of water-permeable weed-proof bags each comprising a holding part are prepared, and the bag-shaped portion of the weed-proof bag is filled with a filler mainly composed of wood chips. In the bag, the fin-shaped holding part of one weed-proof bag and the bag-shaped part of the other weed-proof bag are laid without any gap so as to overlap each other, so that the ground surface is shielded from sunlight to prevent weeding. A method according to a first aspect, wherein a rectangular bag-shaped portion formed of a water-permeable cloth member and filled with a filler mainly composed of wood chips, and at least two adjacent edges of the bag-shaped portion Fin-shaped holding part extending over the entire length of each side An anti-grass bag comprising a second aspect.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS That is, the method for controlling weeds of the present invention comprises:
Since the filling is filled and laid out in the grass bag, the ground surface is covered with a bag-like part filled with filler and formed to a certain thickness, and it is shielded from sunlight,
Weed tree growth is suppressed. In addition, the filled weedproof bags are laid out without gaps so that the fin-shaped pressing portion of one weedproof bag and the bag-shaped portion of the other weedproof bag overlap with each other in the adjacent weedproof bags. Light rays leaking from the minute gaps formed between the bag-shaped portions are blocked by the fin-shaped holding portions, and weeds can be almost completely suppressed. Therefore, it is not necessary to perform undercutting work, and it is possible to drastically reduce forest growth costs. In addition, the herbicidal bag filled with the filler has a certain degree of weight and is not formed in a sheet shape as in the related art, but has a thickness, so that it is not blown or turned up by wind or the like. . For this reason,
Work such as holding with pins or piles is not required, and installation work is completed simply by laying and arranging grass-proof bags, thus greatly improving workability. Furthermore, even if there are irregularities or foreign substances in the installation location, the filling material flows inside the bag freely, so that the grass bag can flexibly follow the irregularities and the like as in the conventional case. There is no gap where weeds grow. In addition, since the pruning branches can be used as the filler to be filled in the inside, it is possible to effectively treat a large amount of branch waste material generated by pruning.

In the present invention, if the grass bag is formed of biodegradable fibers, the biodegradable fibers are naturally decomposed after a predetermined period of time, and the wood chips and the like are scattered on the ground. By decomposing, the plantations are turned into mulch, which is expected to maintain the soil strength and make more efficient use of waste wood. Moreover, in this case, the grass bag itself disassembles itself and returns to the soil, eliminating the need for removal work, and preventing accidents such as leaving the grass bag on the plantation and workers' feet. No safety issues.

[0010] In the present invention, the term "water-permeable cloth-like member" refers to any water-permeable cloth-like material such as a woven fabric, a knitted fabric, a nonwoven fabric, and a net.

Next, the present invention will be described in detail with reference to the drawings.

FIG. 1 shows an embodiment of a weed-proof bag according to the present invention. The grass bag 10 includes a rectangular bag-shaped portion 11 filled with wood chips, and fin-shaped pressing portions 12 formed on the vertical and horizontal sides adjacent to the bag-shaped portion 11.

More specifically, the weed-proof bag 10
Is formed by sewing a lower end edge of a tubular net-like member (cloth-like member) 13 to form a bag-like body that is open on the upper surface, and a portion closer to the inside by a predetermined width from one side edge of the bag-like body. Are sewn in the vertical direction, and a portion closer to the upper side by a predetermined width from the lower end edge is sewn in the horizontal direction, so that the bag-shaped portion 11 and the fin-shaped pressing portion 12 are formed. At this time, the fin-shaped pressing portion 12 has two net-like members 13 stacked. A band-like folded portion 18 is formed at the upper opening edge of the bag-shaped body.
An opening diaphragm cord 14 is inserted through the opening, and the opening of the bag-shaped portion 11 filled with the wood chips is narrowed and closed.

The mesh member 13 is, as shown in FIG.
A monofilament yarn 15 made of synthetic fiber such as polyethylene or polypropylene is knitted in a flat knit structure and formed in a net shape. Then, biodegradable fiber yarns 16 made of polylactic acid fibers are used at a ratio of one stage every 14 stages. The stitch density at this time is 52% in loop density.
8 is set.

The grass bag 10 having the above structure is used, for example, as follows. That is, first, a pulverized waste material obtained by chipping a chipped waste material as a filler material is supplied by an air chute and supplied to the bag-shaped portion 11 of the weed-proof bag 10.
Fill. Then, as shown in FIG. 3, the string 14 for squeezing the opening of the grass bag 10 is squeezed and tied to close the opening. In this state, as shown in FIG. 4, the bag-shaped portion 11 is filled with a wood chip 17 therein, and has a certain thickness. On the other hand, the fin-shaped holding portion 12 is
Are not filled, and the fin shape is maintained. Next, as shown in FIG. 5, the grass-proof bags 10 filled with the wood chips 17 are laid between the plantations in the plantation. At this time, as shown in FIG.
a, the fin-shaped holding portion 12 of one of the weedproof bags 10a.
The bag-shaped part 11 of the other grass-proof bag 10 is stacked on the
In this state, the bag-like portion 11a of the one grass-proof bag 10a
And the bag-shaped part 11 of the other grass-proof bag 10 is laid out without any gap so as to abut. As a result, the bag-like portion 11, which is filled with the wood chips 17 and has a certain thickness,
11a contact each other, and the adjacent bag-shaped portion 1
Light rays leaking from the minute gap formed between the first and the first 11a are blocked by the fin-shaped holding portions 12a laid under the bag-shaped portion 11, so that the ground surface is completely shielded from sunlight. I have.

As described above, in the above-mentioned weed control method, the surface of the ground is covered with the bag-like portions 11 each having a certain thickness formed by filling the wood chips, and the space between the adjacent bag-like portions 11 is formed. Light rays leaking from the minute gap portion to be cut off are blocked by the fin-shaped holding portions 12, 12a, and weeds can be almost completely suppressed. In addition, the workability is good because it is not blown or turned up by the wind or the like, and it is not necessary to press with a pin or a stake or the like. Furthermore, this grass bag 10
Even when the installation location has irregularities, the wood chips 17 filled therein flow to flexibly conform to the irregularities and the like,
There is no gap where weeds grow (see FIG. 6). Moreover,
Since the pruning branches are used as the wood chips 17 to be filled in the inside, it is possible to effectively treat a large amount of branch waste material generated by pruning. In addition, the grass bag 10 includes a biodegradable fiber yarn 1 on a part of the mesh member 13.
Since the biodegradable fiber yarn 16 is used, the wood chips 17 are scattered on the ground surface and decomposed by the decomposition of the biodegradable fiber yarns 16, and the plantation is turned into mulch, thereby maintaining the soil strength. The biodegradable fiber yarn 16 is used at a predetermined ratio, and the biodegradable fiber yarn 1 is used.
Even if other fibers remain after the disassembly of 6, the fibers are separated, so that an adverse effect such as an operator's foot is not caused. Further, in the above weed control method, by using a cellulose-based polylactic acid fiber as the biodegradable fiber,
Decomposition products of polylactic acid fibers have the effect of promoting plant growth and promoting forest growth. Further, since the fin-shaped pressing portion 12 has a two-layer structure of the net-shaped member 13, light shielding is more complete. In addition, since the bag-like member 11 has a flat knitting structure, the bag-like member 11 is rich in elasticity, can be filled with a large amount of wood chips 17, and easily conforms to irregularities on the ground.

Although the biodegradable fiber yarn 16 is used as a part of the mesh member 13 in the above-mentioned grass-proof bag 10, more preferably,
The entire herbicidal bag 10 may be formed of the biodegradable fiber yarn 16. In this case, since the grass-proof bag 10 itself is naturally decomposed and returned to the soil, the removal work becomes unnecessary, and there is an accident that the grass-proof bag 10 remains in the plantation and the foot is taken by the worker. Does not occur.

Further, in the above-mentioned herbicidal bag 10, polylactic acid fiber was used as the biodegradable fiber, but the present invention is not limited to this. For example, an aliphatic polyester produced by a fermentation method (trade name: Biopol, ICI) Co., Ltd.), aliphatic polyester by synthetic method (trade name: Bionole, manufactured by Showa Polymer Co., Ltd.), starch-based biodegradable fiber (starch / PVA + vegetable oil)
Various types of biodegradable fibers such as (trade name: Materby, manufactured by Nippon Synthetic Chemical Co., Ltd.) can be used. In addition, the biodegradable period is adjusted by changing the type of biodegradable fiber, impurities, surface area, thickness and orientation of fiber and yarn, and adding an appropriate amount of a weathering agent such as an ultraviolet absorber. can do. The thickness of the thread is 5
It is preferable to use a count of 25 to 25. In other words, the thinner the thinner, the shorter the period required for the decomposition, but it is preferable to set the above range in consideration of the strength. As for the biodegradation period, the decomposition period of the wood chips to be filled therein is about 5 to 7 years, and the undergrowth becomes difficult to grow after 8 years after planting. ~
Preferably, it is set to seven years.

Further, in the above-mentioned grass-proof bag 10, the grass-proof bag 10 itself is formed by the net-like member 13. However, the present invention is not limited to this. For example, various types can be used. In this case, it is preferable that the density of the cloth-like member (the minute gap between the fibers) is as small as possible.
About 90% is preferable, and in a knitted fabric, the loop length is 0.2 inches or less and the loop density is 500 or more ([loop density] =
[Wale] x [course])
More preferably, the loop density is set to 800 or more. That is, if the density is coarse, the leaves of coniferous plants (the tips of the leaves are thin and sharp) start growing by passing through the minute gaps between the fibers, and conversely, if the leaves are too thin, the cost increases. .

In the above-mentioned grass-proof bag 10, the bag-like portion 11
Although the opening is closed by squeezing with the aperture stop string 14, it may be closed by stapling or suturing with a portable sewing machine. By doing so, deformation of the bag-like portions 11 caused by narrowing the opening is prevented, and when the bags 11 are laid side by side, it is difficult for a gap to be formed between the grass-proof bags 10, and light leakage is eliminated. The grass effect becomes more complete. Further, in this case, the suture or stapling needle may be formed of biodegradable fiber or biodegradable resin.

Further, in the above-mentioned weed control method, as the wood chips 17 to be filled in the inside, the used branch waste material after pruning is used. However, the present invention is not limited to this, and a large amount of sawdust discharged from a sawmill or the like is used. Can also be used. That is, any waste wood material that has been chipped can be used, and the effective use of waste can be achieved.

Further, in the herbicidal bag 10 of the present invention, a treatment for applying a repellent for repelling animals such as hares and rats can be performed on the surface of the herbicidal bag 10 itself. By doing so, the above-mentioned animals do not enter the afforestation area, and damages such as breaking of the grass-proof bag 10 and erosion of the tree trunk are not caused. Examples of the repellent include β-naphthol, creosote, thiuram paste, thiuram wettable powder, guazatine / thiuram wettable powder, petroleum asphalt wettable powder, and the like. These are used alone or as a mixture of two or more components.

Further, in the herbicidal bag 10 of the present invention, a treatment of applying a herbicide for removing weeds to the surface of the herbicidal bag 10 itself can be performed. By doing this,
The herbicidal effect of the herbicide and the herbicidal effect of the herbicidal bag 10 by blocking sunlight are combined, so that a more complete herbicidal effect can be exhibited. Examples of the above herbicides include inorganic herbicides such as sodium chlorate, ammonium sulfamate and sodium cyanate, DPA (Dalapon), tetrabion,
Fatty acid herbicides such as TCA, phenoxy herbicides such as MCP and triclopyr, aromatic carboxylic acid herbicides such as picloram, carbamate herbicides such as ashram, and organic phosphorus herbicides such as glyphosate and fosamine ammonium; Urea herbicides such as carbbutyrate are used.
These are used alone or as a mixture of two or more components.

In the grass-proof bag 10 of the present invention, the size of the bag-shaped portion 11 is suitably such that it can be carried by hand with wood chips filled therein, and is approximately 50 cm × 50 cm to 1.5 m × 1. About 5 m is appropriate. If the size is too small, the work of filling wood chips and the work of installing the grass-proof bag become complicated, and if the size is too large, the planting interval is 1 m to 2 m, which makes it difficult to use. Also, the width of the fin-shaped holding portion 12 is suitably about 10 cm to 30 cm. If the width is too narrow, the stacking of the bag-shaped portions 11 cannot be performed, and the light-shielding effect deteriorates. On the other hand, if the width is too wide, it becomes difficult to handle.

The weed-proof bag 10 of the present invention can also be used for median strips, open space management, and the like. In this case,
Since the herbicidal bag 10 is required to have a certain degree of durability, biodegradable fibers are not used, and are formed of strong synthetic fibers such as nylon and polyethylene. In addition, as the filler, a material that is difficult to decompose, such as slag, gravel, and sand, is used.

[0026]

As described above, according to the weed control method of the present invention, since the wood chips are filled and laid in the weed control bag, the ground surface is covered and is shielded from sunlight. Weed tree growth is suppressed. In addition, light rays leaking from the minute gaps formed between the adjacent bag-shaped parts are blocked by the fin-shaped holding parts, so that weeds can be suppressed almost completely, and the need for under-cutting work is not required, and the forest is grown. The cost can be significantly reduced. In addition, since the work of pressing with a pin or a pile is not required, and the installation work is completed simply by laying and arranging grass-proof bags, workability is remarkably improved. Furthermore, even when there is unevenness or foreign matter in the installation location, the wood chips filled therein flow, so that the wood chips can flexibly follow the unevenness and the like, and there is no gap where weeds can grow. In addition, by using the pruning branches as the wood chips to be filled in the inside, it is possible to effectively treat a large amount of branch waste generated by pruning.

Next, an embodiment will be described.

In the grass bag 10 shown in FIG. 1, the net portion 13 is made of polyethylene monofilament (200 denier) and polylactic acid-based biodegradable fiber yarn 16 (trade name "Lactron" manufactured by Kanebo Co., Ltd.) (225 denier). And formed into a net shape by flat knitting. And the bag-shaped part 1
The width dimension (A in the figure) and the vertical dimension (B in the figure) of No. 1 were set to 430 mm and 830 mm, respectively, and the width dimension (C in the figure) of the fin-shaped pressing part 12 was set to 150 mm.

The above-mentioned weed-proof bag 10 is filled with crushed pruning branches of cedar and cypress with a chipper.
They were laid at planting intervals. The weed control effect for about six months from June to November was high, and the undercutting work was unnecessary.

For the decomposition of the biodegradable fiber yarn 16, an accelerated test was first conducted by an ultraviolet irradiation test in which two Hitachi germicidal lamps (GL-15) were irradiated from a height of 500 mm (using a Hitachi Clean Bench as an apparatus). ). The polyethylene monofilament 15 did not change at all, whereas the biodegradable fiber yarn 16 decomposed by pulling by hand for 96 hours of irradiation and spontaneously decomposed by irradiation of 336 hours.

Further, regarding the decomposition of the biodegradable fiber yarn 16, the activated sludge in the wastewater treatment plant is heated to a temperature of 30 ° C. to 40 ° C.
A decomposition test was carried out using the activated sludge treatment test held at (Kanebo Nagahama Plant, Nagahama City, Shiga Prefecture). The degree of decomposition was evaluated by observing the morphological change with an electron microscope and the degree of strength deterioration with a tensile tester. Biodegradable fiber yarn 16
Decomposed by a test of 0.5 to 1.5 years.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of a grass-proof bag of the present invention.

FIG. 2 is an enlarged plan view showing a mesh member of the grass bag.

FIG. 3 is a perspective view showing a use state of the grass bag.

FIG. 4 is a sectional view taken along line DD of the weed-proof bag in the above-mentioned use state.

FIG. 5 is an explanatory view showing the operation of the above-mentioned grass-proof bag.

FIG. 6 is an explanatory view showing the operation of the grass bag.

FIG. 7 is an explanatory diagram showing a conventional example.

FIG. 8 is an explanatory diagram showing a use state of the above conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Weed-proof bag 11 Bag-shaped part 12 Fin-shaped holding part

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-51-100451 (JP, A) JP-A-3-292821 (JP, A) JP-A-54-164257 (JP, U) (58) Survey Field (Int. Cl. ⁷ , DB name) A01G 13/00 A01M 21/00

Claims (4)

(57) [Claims] 1. A plurality of water-permeable weed-proof bags each comprising a quadrangular bag-shaped portion and fin-shaped holding portions extending over at least two edges adjacent to the bag-shaped portion over the entire length of each side are prepared. The bag-shaped part of this weed-proof bag is filled with a filler mainly composed of wood chips, and the filled weed-proof bag is placed in the adjacent weed-proof bag with the fin-shaped holding part of one weed-proof bag and the other. A weed control method characterized in that the ground surface is shielded from sunlight to prevent weeding by laying the bag-like portions of the grass bag so as to overlap each other without any gap. 2. The weed control method according to claim 1, wherein the weed prevention bag is a weed prevention bag formed of biodegradable fibers. 3. A rectangular bag-shaped portion formed of a water-permeable cloth member and filled mainly with wood chips, and at least two adjacent edges of the bag-shaped portion. And a fin-shaped holding portion extending over the entire length of the side of the grass. 4. The herbicidal bag according to claim 3, wherein said cloth member is formed of biodegradable fibers.