JPH02286016A - Algae-proofing mineral fiber medium - Google Patents

Abstract

PURPOSE:To obtain the subject medium capable of suppressing the generation of algae on the surface of the medium without causing the phytotoxicity and growth retardation to the plant grown on the medium by applying and attaching a water-soluble copper compound to the surface of a mineral fiber medium. CONSTITUTION:The objective medium can be produced by applying or attaching a water-soluble copper compound (e.g. cuprous chloride or copper nitrate) and preferably a non-hormone contact organic herbicide to at least the surface of a medium made of mineral fiber (e.g. rock wool or slag wool).

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to an algae-proofing mineral fiber medium, and more specifically, it is possible to prevent algae from being applied to the surface of the medium without causing phytotoxicity or growth problems to plants growing in the medium. This invention relates to an algae-proofing mineral fiber medium that can suppress the growth of algae.

[Conventional technology]

It is already well known that molded bodies or granules of mineral fibers such as rock wool, slag wool, ceramic wool, or glass wool are used as artificial culture media for plant cultivation.

However, if plants are grown using a nutrient solution containing fertilizer on such a medium, algae, especially green algae, will usually grow on the surface of the medium and the growth will be relatively short-term unless the cultivation is done in darkness. Since the algae come to cover the entire surface with algae, it not only significantly impairs the aesthetic appearance of ornamental plants placed indoors, but also causes the algae to wither and rot, creating a layer on the surface that obstructs ventilation and liquid permeability. In addition, there have been various problems such as diseases caused by this, and even spawning by pests, which creates an unsanitary environment indoors.

Conventionally, in order to prevent the occurrence or growth of algae, methods such as coating the surface of the culture medium with a film that does not transmit light, or covering the surface of the culture medium with granular culture soil or granular plastic, were used to prevent light from directly hitting the surface of the culture medium. Although measures have been taken to prevent algae from occurring, a sufficient algae-preventing effect cannot necessarily be expected at this level. Therefore, as one of the means to deal with this, for example, Japanese Patent Application Laid-Open No. 63-52827
The technology shown in the publication is proposed. This technology is
This method attaches a water-insoluble metal hydroxide to the surface of the culture medium bed, and although the metal can be expected to have a certain degree of bactericidal effect at first, the hydroxide becomes water-insoluble, so the bactericidal effect after that is reduced. Therefore, the main method of preventing algae is thought to be to suppress the growth of algae through the light-shielding effect of the formed hydroxide particle layer. Therefore, its effectiveness has its own limits, and it is difficult to serve as a fundamental means for suppressing the growth of algae. In addition, as other conventional techniques, it is known that tests were conducted long ago in which copper compounds were applied for the purpose of preventing moss on unglazed columns, but the algae-preventing effect of mineral fiber media and the No particular study was conducted on plant growth.

[Problem to be solved by the invention]

The present invention is an anti-algae mineral fiber that can suppress the growth of algae on the surface of the medium and create a clean and sanitary environment without causing chemical damage or growth problems to plants growing in the medium. The purpose is to provide a culture medium.

[Means to solve the problem]

The present invention has been made to solve the above problems, and its gist is as follows: (1) A water-soluble copper compound is coated or adhered to at least the surface of a mineral fiber medium. Anti-algae mineral fiber medium.

(2) An anti-algae mineral fiber medium, characterized in that both a water-soluble copper compound and a non-hormonal contact organic herbicide are coated or adhered to at least the surface of the mineral fiber medium.

(3) An anti-algae mineral fiber medium, characterized in that both a water-soluble copper compound and a spreading agent are coated or adhered to at least the surface of the mineral fiber medium.

(4) An anti-algae mineral fiber medium, characterized in that a water-soluble copper compound, a non-hormonal contact organic herbicide, and a spreading agent are coated or adhered to at least the surface of the mineral fiber medium.

It is in.

The present invention will be explained in detail below.

First, as the mineral fibers of the culture medium used in the present invention, as mentioned at the beginning, conventionally used rock wool, slag wool, or ceramic wool mainly composed of silica and/or alumina fibers, and It is possible to use glass wool, carbon fiber wool, etc. in any shape such as molded or granular materials, and in addition, it is possible to use materials that do not substantially react with the nutrient solution and do not contain any components that inhibit plant growth. Any mineral fiber may be used as long as it is a stable material that does not elute.
It can be appropriately selected and used depending on the purpose.

Next, water-soluble copper compounds are used in the present invention because water-soluble copper compounds have effective anti-algae properties, are harmless to plants, and can provide good effects with a relatively small amount. .

Such copper compounds include -valent or divalent ones, and specifically include cuprous chloride, cupric chloride, cuprous bromide, cupric bromide, cuprous iodide, Copper sulfate, copper nitrate, tertiary phosphate, cuprous oxide, cupric oxide, basic copper sulfate, cupric sulfide, cupric hydroxide, cupric potassium chloride, copper carbonate,
Examples include copper formate, copper acetate, and tertiary citric acid.

These copper compounds may be blended individually, or
A combination of two or more types may also be used.

The concentration of these water-soluble copper compounds is 0601 as an aqueous solution.
-0.5% by weight, preferably 0.05-0.2% by weight. If the metal compound concentration in the aqueous solution is less than 0.01% by weight, it will not affect the growth of plants, but the algae-preventing effect will not be sufficient and it will be difficult to suppress or prevent the growth of green algae. On the other hand, if the concentration is higher than 0.5% by weight, abnormal phenomena in plant growth, such as deformation of leaves of cultivated plants, deformation of rice leaves, etc., will be observed, which is not desirable.

In the present invention, even if such a water-soluble copper compound is used alone, it will of course have the desired effect, but in addition, a specific organic herbicide may be applied or applied to at least the surface of the mineral fiber medium. If it is allowed to adhere, the anti-algae effect will be further improved.

As organic herbicides that can be used in the present invention, organic herbicides such as naphthoquinone or dichlobenyl that are effective in killing weeds in rice fields, etc. can be considered, but they are particularly effective in controlling aquatic weeds such as duckweed and algae. Non-hormonal catalytic organic herbicides with strong photosynthesis inhibiting power are particularly effective, especially 2-amino-3-chloro-1,4-naphthoquinone, known as ACN agent. Its usage concentration is 0 as an aqueous solution.
．． 0.005 to 0.05% by weight, preferably 0.01 to 0.00% by weight.
02% by weight is good. If the concentration is less than 0.005% by weight, there will be no problem with plant growth, but it will be difficult to suppress or prevent the growth of green plants and the like. On the other hand, if the concentration is higher than 0.05% by weight, abnormalities will be observed in the growth of plants, and phenomena such as leaf deformation, rice leaf growth, and degeneration will occur, which is undesirable.

Further, in the present invention, if a spreading agent is used together with the water-soluble copper compound described above, it is particularly effective in improving algae-proofing properties by improving spreading wettability and penetrating wettability. In this case, if the above-mentioned non-hormonal contact organic herbicide is added to these and used as a combination, the most desirable algae-preventing effect can be expected.

The spreading agent used in the present invention includes wet spreadability, permeability, and adhesion of the metal compound and the herbicide, which are the algae-proofing agents.
Any agent may be used as long as it can improve adhesion, and nonionic surfactants are particularly desirable from the standpoint of compatibility with the antialgae agent and the mineral fiber medium. Examples of nonionic surfactants include polyethylene glycol ether (
alkyl ethers, alkylphenyl ethers, etc.)
Polyethylene glycol fatty acid ester, polyhydric alcohol fatty acid partial ester (sugar alcohol ester, etc.),
Alternatively, there are polyethylene glycol ethers of the above partial esters, but polyoxyethylene alkylphenyl ethers are particularly effective. The amount used is preferably 10 to 1100 pp as an aqueous solution concentration, especially 2
0 to 50 ppm is desirable. The concentration of spreading agent is 10ppm
If the amount is less, sufficient spreading effect cannot be achieved,
On the other hand, even if the concentration is higher than 1100 pp, the effect commensurate with the added amount cannot be obtained.

The culture medium of the present invention is made by applying or adhering the above-mentioned antialgal agent or spreading agent to at least its surface, but the means for application or adhesion is such that it is dissolved in an aqueous solution or the like beforehand. It can be applied by conventional means such as scattering, spraying, or brushing, or it can be applied in powder form to the surface of the culture medium in advance and then turned into a solution by water supply means such as watering to exert the anti-algae effect. Also good.

It goes without saying that the culture medium of the present invention may be impregnated with or attached with fertilizer in advance, but other additives such as water retention agents or other agricultural chemicals such as fungicides may also be added to the extent that they do not interfere with the anti-algae effect. may be included if necessary.

〔Example〕

The present invention will be explained in more detail with reference to Examples below.

Examples 1 to 4 and Comparative Examples 1 to 2 The drugs at the respective concentrations shown in Table 1 were mixed for each Example and Comparative Example to form a single aqueous solution, and the surface of the culture medium shown in Table 1 was coated unevenly ( Spread 2g per IM so that it adheres, let it air dry indoors for one day, and then sow each plant shown in the table.
The plants were soaked in a nutrient solution and grown for 60 days, and the growth status and presence or absence of chemical damage were investigated. The results are also listed in Table 1. As is clear from the results in the same table, the growth of green algae was not observed in any of the media of the present invention, and the growth conditions of the plants were good, giving very favorable results.

*1 Nisblan C750: Rock wool medium manufactured by Nippon Steel Chemical *2 ACN: 2-amino-3-chloro-1,4-naphthoquinone *3 to *5 Polyoxyethylene alkylphenol ether-based spreading agent (concentration in aqueous solution) Indicates the concentration of the active ingredient.) *3
AGLER: ■ Spreading agent manufactured by Agro Kanesho *4 Alsove Ni Takeda Pharmaceutical ■ Spreading agent *5 Kusarinoh Nippon Nohgaku ■ Spreading agent Since these agents can be easily obtained by applying or adhering the agent to at least the surface of the medium, they may be applied in advance when forming the medium, or they may be sprinkled on the surface of the seeded medium during plant cultivation. In addition to being extremely easy to handle, it also has excellent antifreeze effects.
In addition, the mineral fiber medium does not cause any phytotoxicity or growth disorder to the plants growing in the medium, and the mineral fiber medium can be expected to be used in a wider range of applications.

Claims (1)

[Scope of Claims] 1. An anti-algae mineral fiber medium, characterized in that a water-soluble copper compound is coated or adhered to at least the surface of the mineral fiber medium. 2. An anti-algae mineral fiber medium, characterized in that both a water-soluble copper compound and a non-hormonal contact organic herbicide are coated or adhered to at least the surface of the mineral fiber medium. 3. An anti-algae mineral fiber medium, characterized in that both a water-soluble copper compound and a spreading agent are coated or adhered to at least the surface of the mineral fiber medium. 4. A water-soluble copper compound on at least the surface of the mineral fiber medium;
An anti-algae mineral fiber medium characterized by being coated with or adhered to a non-hormonal contact organic herbicide and a spreading agent.