JP2007252241A - Method for killing rhizome - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for killing rhizomes, which does not require a weeder of exclusive use and a fuel, easily and economically weeds in a wide area even in a wasteland such as hills and fields, banks and dry riverbeds on which weeds grow thickly, and kills weed rhizomes and exterminates rhizomes in a non-reliving state. <P>SOLUTION: Quicklime 5 is applied to weed rhizomes in a layer state, water is sprayed on the quicklime, which is covered with a heat insulation/moisture retaining mat 7 and the rhizomes are killed by hydration heat generation action of quicklime and steaming action followed by the action. If necessary, a high water retention material 6 is laid on the layered quicklime and water is sprayed on the material. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a rhizome killing method for killing rhizomes of weeds such as weavers that grow on fields, banks, riverbeds, and the like.

  As a method of this kind, Patent Document 1 (Japanese Patent Laid-Open No. 7-163285) uses a weeder equipped with a fuel tank, a burner, an injection liquid tank, and an injection pipe on a handcart, and edible waste oil in the injection liquid tank. We move the wheelbarrow while heating with a burner, and when it comes to the root of the weed, stab the spray tube at the root, inject the heated edible oil into the root, and necrotize the cells of the root part, weed A method of removing weeds that aims to kill the whole is disclosed.

  Patent Document 2 (Japanese Patent Application Laid-Open No. 9-117247) discloses a hot water weeder equipped with a fuel tank, a burner, a hot water supply tank as a hot water supply unit, and a hose with an injection nozzle in a hand cart, and the hand cart is moved. However, a method is disclosed in which hot water is applied to the weeds so that they die.

However, according to these, there are the following problems.
(1) In the former method disclosed in Patent Document 1, even when high temperature edible waste oil is sprayed onto the rhizomes of weeds, water spraying and high fever are taken away by the potential temperature absorption function of the rhizome body, water content, voids, soil, etc. The high heat retention time is extremely short, and the reality of letting the whole rhizome die with only high temperature edible waste oil is extremely low, even if it seems to have been temporarily or partially dead, There is a problem that a fresh rhizome revives or invades from adjacent and returns to its original state. In addition, the use of vegetable oil is not preferable because it causes pollution of the river environment and is prohibited by law (Article 3-3 of the Enforcement Ordinance for Water Pollution Control Law). In addition, a special weeder equipped with a burner, fuel tank, and jet liquid tank on a handcart is required, which must be brought to the site and moved, and fuel is also required. Even if it can be applied to partial weeding at the site, it is not possible to weed in the rough land where weeds grew in the ups and downs of complex ground such as mountain, bank and riverbed.

(2) In the latter method, as in the former, even when hot water is applied to the rhizomes of weeds, high heat is lost to the potential temperature absorption function of the rhizome body, water content, voids, soil, etc. in the soil, and the high heat retention time. Is extremely short, and the feasibility of letting the whole rhizome to die with boiling water is very low, even if it seems to be dead temporarily or partly There is a problem of intrusion and returning to the original state. Also in this case, a dedicated hot water weeder equipped with a burner, fuel tank and hot water supply tank is required, which must be brought to the site and moved, and fuel is also required. Although it can be applied to partial weeding in terrain, such as alleys and gardens, weeding is not possible in wilderness where weeds have grown in complex undulations such as fields, levee and riverbeds.
JP-A-7-163285 JP-A-9-117247

  The problem of the present invention is that there is no such problem, a dedicated weeder and fuel are not required, and weeding can be easily and economically and extensively even in a wasteland where wild weeds such as fields, riverbanks and riverbeds are prosperous. Another object of the present invention is to provide a method for killing rhizomes that can kill roots of weeds and eradicate them into an unrecoverable state.

  In the present invention, quicklime is spread in layers on the rhizome of weeds, and water is sprayed on the rhizome and covered with a heat and moisturizing mat, and the rhizome is boiled by the hydration exothermic action of the quicklime and the accompanying steaming action.

Preferred forms are as follows.
A highly water-retaining material is laid on the layered quicklime and sprinkled with water, and then covered with a heat and moisture retention mat.
Cut the weeds stems to form a lime-spread area.
Raise the rhizome after cutting the standing stem to form a void.
Cut off a cut-off groove along the periphery of the quicklime distribution area.
Install a blocking material to prevent rhizomes from entering the blocking groove.

  According to the present invention, the use material is only quick lime, water, and a heat and moisture retention mat, and the quick lime is spread in layers, and the water is sprayed and covered with the heat and moisture retention mat. Machines and fuel are not required, and weeds can be easily and economically widespread in wilderness such as wild mountains, embankments and riverbeds. In addition, the hydration exothermic action of quicklime and the steaming action in a state covered with a heat and moisture retention mat simmer the rhizome, and further increase the water retention of the treatment area to improve the moisturizing effect. Can also be promoted, and can be eradicated into a non-recoverable state by a synergistic effect. In addition, even if lime remains, it does not affect the natural environment, and the heat and moisture retention mats can be removed and used repeatedly, making it economical, workable, and safe as an environmental conservation method for fields, river banks, riverbeds, etc. Excellent in all aspects such as sex.

  When a highly water-retaining material is laid and sprinkled on layered quicklime and covered with a heat and moisture retention mat, the hydration exothermic action and steaming action of quicklime and corrosion after treatment can be improved.

  By cutting the weed stalks and setting the area where the quicklime is distributed, workability can be improved.

  By lifting the rhizomes that have been harvested from standing stems and forming voids, quicklime is filled between the soil and the rhizomes, and the quicklime layer wraps the rhizomes, increasing the effect of boiled rhizomes. Can do.

  By creating a blocking groove along the periphery of the quicklime distribution area, it is possible to block the rhizome from the outside area, and by installing a blocking material in the blocking groove, it is possible to reliably prevent the penetration of the rhizome from the outside area. .

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

  First, weeds such as Japanese knotweed are prosperous, and the weeds of the weeds in the area where the present invention is to be carried out are cut from the roots. The mowing may be performed using a general mowing tool such as a sickle, a shoulder-type mower, or a self-propelled mower.

  After cutting the standing stem, as shown in FIG. 1, the blocking groove 2 is formed along the periphery of an area 1 (hereinafter referred to as “implementation area”) 1 where the present invention is to be performed while cutting the rhizome part. The grooving can be performed with a general tool capable of grooving, such as a scoop capable of root cutting or a grooving machine.

  The groove formation of the blocking groove 2 is to block the rhizomes from outside the working area 1 from entering the working area 1, and in order to ensure the blocking, as shown in FIG. A blocking material 3 is installed in 2. As the blocking material 3, a resin sheet, a resin film, or the like is preferable. For example, an inexpensive polyethylene trash bag that is commercially available for general households is suitable. In the case of using a garbage bag, soil is packed therein to form a rod-shaped nodule having a diameter of about 10 cm, and this is filled in the blocking groove 2.

  The rhizome in the implementation area 1 where the standing stem has been cut is lifted to form a gap. As the equipment used for the lifting, as shown in FIG. 6, there is an iron bar 4 having a flange 4a, a fulcrum ring 4b, and a stopper 4c for adjusting the position thereof, a small engine-type forklift, and the like.

  After the inside of the implementation area 1 and its surroundings are formed in this manner, as shown in FIG. 3, the powdered or granular quicklime 5 is spread in layers throughout the implementation area 1, and the rhizome and the soil that have been lifted up. The quicklime 5 is filled in between. The distribution can be performed in the same manner as a general agricultural chemical distribution operation using an agricultural chemical distributor. Wear protective equipment such as masks, gloves and glasses for health safety.

  As the quicklime to be distributed, the components shown in Table 1 may be used. However, if high heat generation during hydration exotherm is desired, the components shown in Table 2 having a high calcium oxide content are preferable.

  Next, as shown in FIG. 4, a highly water-retaining material 6 is laid on the quicklime 5 spread in layers as needed, and water is sprayed from there on until the quicklime 5 is sufficiently water-containing. After watering, as shown in FIG. 5, it is immediately covered with a flexible heat and moisture retention mat 7. As the high water retention material 6, hay or wood chips are used. It is convenient to use dead grass from the surrounding weeding, and the laying thickness may be about 5 cm. Sprinkling can be done manually using a bucket and handle or watering can, or with a watering device such as a shower-type watering device with a tank. As the heat / moisturizing mat 7, a commercially available rubber mat (for example, 3 mm thick), a vinyl sheet, an aluminum mat, or the like having no air permeability and no light transmission can be used at low cost and easily. Can be used repeatedly. If there is a river nearby, the water used for watering can be used after taking the water.

  When quicklime 5 is hydrated, it generates heat due to hydration heat generation action, but it is covered with heat retention / moisture retention mat 7, so the steaming action associated with heat generation also works, and the rhizomes in the implementation area 1 are boiled in several tens of minutes. It is. If the state covered with the heat and moisture retention mat 7 is maintained as it is for the required number of days, the rhizome is promoted to corrode by improving the moisturizing effect, and further, regeneration such as germination can be prevented by the synergistic effect of shading.

  According to the experiment, when the temperature of the ground surface and the depth of 5 cm was measured, as shown in FIG. 7, the maximum was about 200 ° C. on the ground surface, and about 60 ° C. or more was continued for about 60 minutes. The temperature of 64 ° C. was continued for about 20 minutes. The graph in the figure shows a comparison with the case where hot water was applied. In the case of hot water, the temperature dropped sharply, but in the case of quick lime hydration, the temperature decreased slowly while maintaining a certain temperature.

  The present invention is not limited to weeds in fields, dikes, riverbeds, and the like, but can also be applied to weeds in farmland, fallow fields, parks, and the like. Quick lime remaining after the hydration reaction can be used as it is as a soil conditioner.

It is a perspective view of the state which cut the standing stem and formed the cut-off groove to form the implementation area of the present invention. It is a perspective view of the installation state of the blocking material in the blocking groove. It is a perspective view of the state where quick lime was spread in layers in the entire area in the implementation area. It is a perspective view of the state where a high water retention material was laid on quicklime. It is a partially cutaway perspective view of the state covered with a heat and moisture retention mat after watering. It is a top view which shows the iron bar of an example of the tool which lifts a rhizome and forms a space | gap. It is a graph which shows the temperature transition which measured the temperature of the ground surface and the underground depth of 5 cm by contrasting the case of the Example of this invention, and the case where hot water is applied.

Explanation of symbols

1 Implementation Area 2 Barrier Groove 3 Barrier Material 4 Iron Bar 5 Quick Lime 6 High Water Retention Material 7 Heat and Moisturizing Mat

Claims (6)

  Rhizome is characterized by spreading quick lime on the rhizome of weeds in layers, sprinkling water over it and covering with a heat and moisturizing mat, and boiling the rhizome by the hydration exothermic action of steamed lime and the accompanying steaming action. How to kill.   2. The rhizome killing method according to claim 1, wherein a highly water-retentive material is laid on the layered quicklime and sprinkled with water, and then covered with a heat and moisture retention mat.   The method for killing rhizomes according to claim 1 or 2, characterized in that the standing stems of weeds are cut to form a distribution area of quicklime.   The rhizome killing method according to claim 3, wherein a gap is formed by lifting a rhizome from which the standing stem has been cut.   The method for killing rhizomes according to any one of claims 1 to 4, wherein a blocking groove is formed along the periphery of the area where the quicklime is distributed. 6. The rhizome killing method according to claim 5, wherein a blocking material for preventing rhizome intrusion from outside is installed in the blocking groove.

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