JPH0670645A - Net unit for culture of crop - Google Patents

Abstract

PURPOSE:To provide a net unit knitted using a net wire made of a plastics degradable by microorganisms in the soil, capable of efficient disposal without a bad influence on the human body or the environment, degradable in the soil, and useful for culture of a plant. CONSTITUTION:A strand is prepared by intertwisting plural monofilaments made of a plastics composed, e.g. of a compound resin of starch and a polyvinyl alcohol-based synthetic polymer, a natural polymer or a polyester-based resin synthesized in the cell body of a bacterium and degradable by microorganisms in the soil into carbon dioxide or methane gas and water. The two or three resultant strands are intertwisted to make a net wire 2 and the net wire 2 is knitted into a net 1 having 6cm one side of the stitch and 48cm width thereof, thus producing the objective net for culture of a crop, capable of ready operation, degradable by microorganisms in the soil, and used nets 2 and unnecessary vines 3 are buried under the soil after culturing a liane using the nets so as to support the climbing vines 3 and harvesting it and, therefore, excellent in environmental pollution.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a net for cultivation of crops which is decomposed into carbon dioxide or methane gas and water by microorganisms in the soil.

[0002]

2. Description of the Related Art Conventionally, a net body woven with a plastic thread has been used as a net body around which long cranes and vines of these crops are wound when cultivating cucumbers. This net is stretched so as to stand along the crane-like cultivated crops planted in the ridges, and the vines are wound around as the crop grows. Then, when the harvest of the fruits that the crop has grown into vines and the root vegetables in the soil is completed, the net around which the vines and the stems are wound is no longer necessary. At this time, it is very troublesome to remove the vine and the like from the net, so that it is usually incinerated as it is or disposed of in landfill.

[0003]

However, incineration of plastic nets often leads to the generation of gas harmful to the human body and the environment, and the space and time required to incinerate a large amount of nets. It will be necessary. In addition, special filters and detoxification devices are required to prevent contamination by toxic gases. In addition, even if the landfill is carried out, the cost of securing land for landfill and transportation is required, and the landfill itself has become a problem as environmental destruction. Therefore,
An object of the present invention is to provide a net for cultivation of crops that can be disposed of with good work efficiency without harming the human body or the environment.

[0004]

Means for Solving the Problems As a technical means for solving the above problems, the present invention is characterized by being knitted by a plastic mesh yarn which is decomposed by microorganisms in soil, and is used for crop cultivation. The net is used as a means.

The microorganisms in the soil include fungi as well as bacteria that live in the soil. Further, the plastic decomposed by the microorganisms in the soil means a plastic which is not decomposed in the air but becomes a bait of microorganisms living in the soil and is decomposed into carbon dioxide or methane gas and water. . Examples of plastics having such properties include a composite resin of starch and a polyvinyl alcohol-based chemically synthesized polymer, a natural polymer, or a polyester-based resin synthesized in bacterial cells.

[0006]

[Advantages] With the above structure, by burying a net body that is no longer needed after use in the soil, it is decomposed by microorganisms existing in the soil and converted into carbon dioxide (or methane). It does not pollute. Further, even when incinerated, it returns to water and carbon dioxide without producing harmful combustion gas, and thus does not pollute the environment. Therefore, it is possible to easily and safely dispose of the waste without requiring a facility for incineration or a landfill site.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 shows a use state of the mesh body 1 of the present invention. The net body 1 is formed by knitting the net yarn 2 into a predetermined shape.

The mesh yarn 2 is a strand obtained by combining a plurality of single yarns, and further a few strands of these strands are put together to form a mesh yarn 2
Is configured. In this example, as the net body 1 for garlic cultivation, one side of the mesh is 6 cm, and the net body 1 having a width of 48 cm is formed. The net body 1 is not limited to the cultivation of garlic, and can be applied not only to cultivated crops but also to ornamental plants as long as it is a crane-like crop.

The plastic used for the mesh yarn 2 is
It has the property of being decomposed by microorganisms in the soil,
It becomes a food for these microorganisms and is metabolized in the body of the microorganisms.
The form is disintegrated and decomposed into carbon dioxide or methane gas and water. Therefore, if it is buried in the soil, it can be returned to the soil. It should be noted that the plastic used as the material of the mesh yarn 2 may be added with an appropriate additive for imparting the physical properties necessary for maintaining the function as the mesh yarn 2 for cultivation. Such additives also take into consideration the property of being decomposed by microorganisms in soil and environmental compatibility. The decomposition rate of such plastics is affected by various factors such as the concentration of microorganisms in the soil, but the decomposition rate in the soil also varies depending on the type of plastic.

Next, the operation of the net body 1 thus formed will be described. Now, the net body 1 thus formed is used for cultivating a vine-like crop, and the vine 3 crawls on the net, and the garlic in the soil shown in FIG. 1 is harvested. After harvesting, the net 1 and the vines 3 of the crop become unnecessary. Therefore, as shown in FIG. 2, the net 1 having the vines 3 crawled is buried in the soil by digging a hole. The buried net body 1 is decomposed as a bait of microorganisms in the soil and metabolized in the body of the microorganisms, the form of the net body 1 is destroyed and finally decomposed into carbon dioxide or methane gas and water. Therefore, the disposal by burying the net body 1 does not destroy the environment in the soil,
It enables safe landfill for crops and humans.

On the other hand, the vine 3 crawling on the net body 1 is also gradually decomposed by microorganisms in the soil and, in the process, is reduced to the soil as a carbon source. In this way, by making the net body 1 itself for cultivating crops decomposable by microorganisms in the soil, the vine part 3 that has been conventionally incinerated can be used as a fertilizer for crops.

Further, depending on the degree of decomposition (decomposition rate) of the net body 1 by microorganisms, it is used as a fertilizer as a carbon source for crops like the crane 3. That is, if the rate of decomposition by microorganisms is within the range that allows organisms to take in carbon as a growth source, it can be an effective fertilizer source during decomposition. Therefore, the net body 1 can be reused as a fertilizer source by burying the net body 1 for disposal. Further, if the net body 1 has the property of being decomposed at a rate equivalent to that of a material containing cellulose as a main component such as raw garbage, fallen leaves and straw under a certain condition, the crane 3
With it, it can be actively used as a compost source.

Further, since carbon dioxide and water are decomposed in this way, they are also completely burned to carbon dioxide and water by incineration. Therefore, no toxic gas is generated during incineration, safety is ensured even in the conventional incineration disposal, and a trap device and a detoxification device for toxic gas are unnecessary. Further, since such plastic has a relatively low combustion heat, it can be easily incinerated without requiring a special incinerator.

Since the net itself is safely returned to the soil or the air by burial or incineration, it may affect the field even if it is used as a burial or incinerator for the net. There is no. Therefore, it is possible to incinerate not only the field that is being cultivated but also the field that has been cultivated. As a result, it is possible to save time and cost without the trouble of carrying the net to a remote place suitable for burial disposal or incineration disposal as in the conventional case. Further, if it is buried in a fallow field, it is convenient because it is similar to fertilizing the field.

[0015]

As described above, according to the present invention,
By making the net decomposable in soil, it is possible to obtain environmental safety and convenience in the work when the net is disposed of, and to combine with the crops attached to the net, carbon source fertilizer or compost. Can be used as a source. For this reason, such a net can be recycled in the course of crop cultivation, and the net can be effectively used and the work efficiency is high.

[Brief description of drawings]

FIG. 1 is a diagram showing a usage state of a mesh body.

FIG. 2 is a diagram in which a net body after use in a state where a crane of a crop crawls is buried in soil.

[Explanation of symbols]

 1 ... Net body 2 ... Net yarn

Claims (1)

[Claims] 1. A net body for crop cultivation, which is knitted with a plastic net thread that is decomposed by microorganisms in soil.