JP2017190436A - Water repellent inhibitor and culture soil using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water repellent inhibitor good in handling ability, capable of penetrating a culture soil or soil to which the same is adhered into water quickly and uniformly even when time lag is generated by use, having water permeability, capable of maintaining stable water repellent inhibition ability over long time, capable of promoting growth of plant and having permeability even when reduction of moisture content of the culture soil is achieved, and the culture soil using the same.SOLUTION: There is provided a water repellent inhibitor used for inhibition water repellency of culture soil or soil having moisture content of 20 to 60 mass%, containing at least one kind of anionic surfactant (A) selected from a sulfonate type and a sulfate type and a nonionic surfactant (B) of polyoxyalkylene glycol, polyoxyalkylenealkylether or the like and having mass ratio represented by (A)/(B) of 0.01 to 5.00.SELECTED DRAWING: None

Description

  The present invention relates to a water repellent inhibitor used for suppressing water repellency of cultured soil and soil, and to cultured soil using the same.

  Many soils such as nurseries and cultivated soils used for cultivation of vegetables, fruit trees, flower buds, etc. are repeatedly supplied with water and dried with the progress of cultivation, so that the density of the soil increases and the water permeability decreases. Furthermore, organic soils such as peat moss, especially soils blended with organic and inorganic soil amendments, fertilizers, soils, etc., have water repellency that is characteristic of dry plant fibrous materials. If there is not enough water in the plant, it will disappear. As a result, the growth of the plant was suppressed, and there was a case where it did not fully develop.

  Culture soil usually contains about 50% by weight of water, but if chemical fertilizer is mixed in the culture soil, it may be altered and not function as a fertilizer. In order to reduce the weight and reduce the weight in order to improve the efficiency of transportation, it is desired to reduce the moisture content.

  Conventionally, a method of blending a surfactant in order to suppress water repellency of cultured soil has been proposed (Patent Documents 1 to 18). In these prior arts, the water repellency inhibiting action has been specifically verified for any one of anionic surfactants and nonionic surfactants used alone. Examples of anionic surfactants include dialkyl sulfosuccinate, sodium alkylnaphthalene sulfonate, sodium alkylbenzene sulfonate, and the like. Examples of nonionic surfactants include polyoxyethylene polyoxypropylene block copolymers, polyoxyalkylene alkyls. Examples include ether types such as ether and polyoxyethylene alkylphenyl ether, ester types such as glycerin fatty acid ester, sorbitan fatty acid ester, and sucrose fatty acid ester, polyethylene glycol fatty acid ester, polyoxyethylene sorbitan fatty acid ester, etc. Has been verified in

JP-A-53-122508 Japanese Patent Laid-Open No. 06-030654 JP 07-000041 A Japanese Patent Application Laid-Open No. 07-026260 Japanese Patent Laid-Open No. 08-023768 Japanese Patent Laid-Open No. 08-130976 Japanese Patent Application Laid-Open No. 08-1557819 Japanese Patent Laid-Open No. 09-074896 JP-A-10-164975 JP-A-10-191780 Japanese Patent Laid-Open No. 11-215917 JP-A-11-256160 Japanese Patent Laid-Open No. 2003-261872 JP 2005-052013 A JP 2008-092955 A Japanese Patent Laying-Open No. 2015-054880 Japanese Patent Laying-Open No. 2015-074677 Table 2012-063899

  However, since the culture soil is usually transported and stored after production, there is a time lag between the production of the culture soil and the actual use, but the culture soil is transported from the production site or stored in a warehouse. When used after this period, the water repellency inhibiting ability as in the case immediately after production may not be exhibited.

  In addition, when an attempt is made to suppress water repellency using only an anionic surfactant, handling properties are deteriorated due to foaming, and there is a risk of adverse effects on plant growth such as plant damage and root rot. On the other hand, it is difficult to maintain the water repellency suppressing ability for a long time with only the nonionic surfactant, and it is easily decomposed with the fatty acid ester type nonionic surfactant, and there is a possibility that the culture soil may be water repellent by the fatty acid generated by the decomposition. It was.

  In the above Patent Documents 1 to 18, various compounds are listed as each ionic surfactant, but any of those specifically disclosed uses an anionic surfactant or a nonionic surfactant alone. Therefore, a combination system of surfactants having different ionic properties has not been verified. Furthermore, about the moisture content reduction of culture | cultivation soil, sufficient water permeability cannot be obtained and it is the situation which has not been realized yet.

  Of Patent Documents 1 to 18, for example, Patent Document 1 includes a fiber material and a surfactant and a polyethylene resin or a urea resin as an adhesive, and is heat-molded at a temperature higher than the melting point of these resins. Although the technique to make is proposed, it is not described about the culture soil of 20-60 mass% of water | moisture contents. Patent Documents 14 and 15 describe artificial culture soil in which a chemical fiber, which is an artificial synthetic product such as PET resin or polylactic acid resin, is used as a culture soil component and a surfactant is blended, but plants such as peat moss are described. In the case of using a natural fibrous material or other natural inorganic material as a culture soil component, it is not described.

  The present invention has been made in view of the circumstances as described above, and has good handling properties. The culture soil or soil to which the material is attached can be quickly and uniformly watered even if a time lag occurs before use. A water-repellent inhibitor that can permeate water, has water permeability, can maintain stable water-repellent inhibiting ability over a long period of time, and can promote the growth of plants and culture soil using the same. The issue is to provide. Another object of the present invention is to provide a water-repellent inhibitor having permeability even when the moisture content of the cultured soil is reduced, and a cultured soil using the same.

In order to solve the above problems, the water-repellent inhibitor of the present invention is a water-repellent inhibitor used for suppressing water repellency of cultured soil having a water content of 20 to 60% by mass, or soil. The anionic surfactant (A) and the nonionic surfactant (B) are included, and the mass ratio represented by (A) / (B) is 0.01 to 5.00:
(A) at least one anionic surfactant selected from sulfonate type and sulfate type; and (B) polyoxyalkylene glycol, polyoxyalkylene alkyl ether, polyoxyethylene alkylphenyl ether, polyoxyethylene styrenation At least one nonionic surfactant selected from phenyl ether, polyoxyethylene (cured) castor oil, polyoxyethylene alkylamine, and fatty acid alkanolamide.

  The culture soil of the present invention is characterized in that the water repellent inhibitor is attached to a culture soil component and the water content is 20 to 60% by mass.

  According to the water-repellent inhibitor of the present invention, the handling property is good, and the culture soil and soil to which this is attached can permeate water quickly and uniformly even if a time lag occurs before being used, It has water permeability, can maintain stable water repellency inhibiting ability over a long period of time, and promotes plant growth. Furthermore, it has permeability even if the moisture content of the culture soil is reduced.

  In addition, according to the culture soil of the present invention, even if there is a time lag before use, water can permeate quickly and uniformly, has water permeability, and maintains stable water repellency inhibiting ability over a long period of time. And promote plant growth. Furthermore, it has permeability even if the moisture content is reduced.

The present invention is described in detail below.
(Water repellent inhibitor)
The anionic surfactant (A) used in the water repellent inhibitor of the present invention is at least one anionic surfactant selected from a sulfonate type and a sulfate type.

  Examples of the sulfonate type anionic surfactant include alkyl sulfosuccinate, alkylbenzene sulfonate, and alpha olefin sulfonate. These may be used alone or in combination of two or more.

  Examples of alkylsulfosuccinates include alkyl groups having 4 to 10 carbon atoms such as isobutyl group, pentyl group, hexyl group, octyl group, 2-ethylhexyl group, decyl and the like, and cationic species such as sodium and potassium. Some mono- or dialkyl sulfosuccinates are mentioned. These may be used alone or in combination of two or more.

  Examples of the alkylbenzene sulfonate include those in which the alkyl group is a straight chain having 10 to 18 carbon atoms and the cation species is sodium, potassium, or the like. These may be used alone or in combination of two or more.

  Examples of the alpha olefin sulfonate include those having an alkenyl group having 12 to 18 carbon atoms and cation species of sodium, potassium, and the like. These may be used alone or in combination of two or more.

  Examples of sulfate-type anionic surfactants include alkyl sulfate salts and alkyl ether sulfate salts. These may be used alone or in combination of two or more.

  Examples of the alkyl sulfate ester salt include those having an alkyl group having 12 to 18 carbon atoms and a cationic species such as sodium and potassium. These may be used alone or in combination of two or more.

  The alkyl ether sulfate salt is, for example, a salt of polyoxyethylene alkyl ether sulfate obtained by sulfate esterification of a higher alcohol having 12 to 18 carbon atoms with addition of ethylene oxide (EO), and the cation species is sodium. , Potassium and the like. These may be used alone or in combination of two or more.

  The nonionic surfactant (B) used in the water repellent inhibitor of the present invention is polyoxyalkylene glycol, polyoxyalkylene alkyl ether, polyoxyethylene alkyl phenyl ether, polyoxyethylene styrenated phenyl ether, polyoxyethylene ( Hardened) At least one nonionic surfactant selected from castor oil, polyoxyethylene alkylamine, and fatty acid alkanolamide.

  Examples of the polyoxyalkylene glycol include polyethylene glycol, polypropylene glycol, polypropylene glycol ethylene oxide adduct, and the like. Among these, polypropylene glycol ethylene oxide adduct is preferable, ethylene oxide content is more preferably 40% or less, for example, 3 to 30 mol of ethylene oxide of polypropylene glycol which is propylene oxide 25 to 35 mol adduct Thing etc. are mentioned. These may be used alone or in combination of two or more.

  Examples of polyoxyalkylene alkyl ethers include propylene oxide and / or ethylene oxide adducts of linear or branched alcohols having 12 to 18 carbon atoms. Among these, 2 to 10 mol of propylene oxide adduct of linear or branched alcohol having 12 to 18 carbon atoms, 2 to 10 mol addition of ethylene oxide of linear or branched alcohol having 12 to 18 carbon atoms And a random or block adduct of 2 to 15 moles of ethylene oxide or 2 to 15 moles of propylene oxide of a linear or branched alcohol having 12 to 18 carbon atoms. In the case of a block adduct, a terminal ethylene oxide adduct is preferable from the viewpoint of an emulsifying and dispersing effect. These may be used alone or in combination of two or more.

  In particular, the polyoxyalkylene glycol and the polyoxyalkylene alkyl ether which are nonionic surfactants (B) are preferably those having an HLB of 8 or less from the viewpoint of handling properties such as foaming and water repellency suppressing ability.

Here, HLB (hydrophilic / lipophilic balance) indicates the molecular weight of the hydrophilic group part in the total molecular weight of the surfactant, and the HLB of the polyoxyalkylene nonionic surfactant is Griffin (Griffin) shown below. ). In the case of a propylene oxide single adduct, the HLB value is 0.
HLB value = E / 5
E:% by mass of the polyoxyethylene moiety contained in the surfactant molecule
As polyoxyethylene alkylphenyl ether, an ethylene oxide adduct of 3 to 50 mol of an alkylphenol having 8 to 12 carbon atoms is preferable, an ethylene oxide 5 to 20 mol adduct of octylphenol, an ethylene oxide 5 to 20 mol adduct of nonylphenol. Is more preferable. These may be used alone or in combination of two or more.

  Examples of the polyoxyethylene styrenated phenyl ether include 3 to 50 mol ethylene oxide adduct of (mono, di, tri) styrenated phenol. These may be used alone or in combination of two or more.

  As polyoxyethylene (hardened) castor oil, castor oil or a 10-60 mol addition product of hydrogenated castor oil is preferable. These may be used alone or in combination of two or more.

  Examples of polyoxyethylene alkylamines include 2 to 20 mol of ethylene oxide adducts of aliphatic primary amines (linear or branched having 12 to 18 carbon atoms). These may be used alone or in combination of two or more.

  Examples of fatty acid alkanolamides include lauric acid diethanolamide, palmitic acid diethanolamide, myristic acid diethanolamide, stearic acid diethanolamide, oleic acid diethanolamide, palm oil fatty acid diethanolamide, coconut oil fatty acid diethanolamide, and the like. These may be used alone or in combination of two or more.

  In addition to the anionic surfactant (A) and the nonionic surfactant (B), the water repellency inhibitor of the present invention further includes a monohydric alcohol having 1 to 8 carbon atoms, a dihydric alcohol having 1 to 8 carbon atoms, It is preferable to contain at least one alcohol (C) selected from trivalent alcohols having 1 to 8 carbon atoms and alkoxy alcohols having 2 to 8 carbon atoms.

  Among the alcohols (C), examples of the monohydric alcohol having 1 to 8 carbon atoms include methanol, ethanol, propanol, butanol, isopropanol, isobutanol, pentanol, 2-methyl-2-butanol, hexanol, and methyl pen. Examples include butanol, dimethylbutanol, 2-ethylbutanol, heptanol, octanol, 2-ethylhexanol and the like. These may be used alone or in combination of two or more.

  Examples of the dihydric alcohol having 1 to 8 carbon atoms include methanediol, ethylene glycol, 1,3-propanediol, 1,4-butanediol, 1,2-pentanediol, 1,4-pentanediol, 1, 5-pentanediol, 3-methyl-1,3-butanediol, 2,2-dimethyl-1,3-propanediol, 1,2-hexanediol, 1,6-hexanediol, 1,2-octanediol, Examples include 1,8-octanediol, diethylene glycol, triethylene glycol, tetraethylene glycol, propylene glycol, dipropylene glycol, and tripropylene glycol. These may be used alone or in combination of two or more.

  Examples of the trivalent alcohol having 1 to 8 carbon atoms include glycerin and the like.

  Examples of the alkoxy alcohol having 2 to 8 carbon atoms include 2-methoxyethanol, 2-ethoxyethanol, 2- (n-propoxy) ethanol, 2-isopropoxy-1-ethanol, 3- (n-propoxy) ethanol, 2- (n-butoxy) ethanol, 2- (2-methoxyethoxy) ethanol, 1-methoxy-2-propanol, 1-methoxy-2-butanol, 3-methoxy-1-butanol, 4-methoxy-1-butanol 1-ethoxy-2-propanol, 3-methoxy-3-methyl-1-butanol and the like. These may be used alone or in combination of two or more.

  In the water repellent inhibitor of the present invention, an alkoxy alcohol having 2 to 8 carbon atoms is preferable among the alcohols (C) exemplified above.

  In the water repellent inhibitor of the present invention, the mass ratio represented by (A) / (B) of the anionic surfactant (A) and the nonionic surfactant (B) is 0.01 to 5.00, preferably Is 0.1 to 0.8. When the alcohol (C) is added to the water repellent inhibitor of the present invention, the anionic surfactant (A), the nonionic surfactant (B), and the alcohol (C) (C) / ((A) + ( The mass ratio represented by B)) is preferably 0.01 to 0.25, more preferably 0.03 to 0.20.

  By blending the anionic surfactant (A), the nonionic surfactant (B) and the alcohol (C) at such a mass ratio, a water repellent inhibitor having a desired effect can be obtained. Since the anionic surfactant (A) has good water permeability, the water repellency inhibiting ability can be maintained for a long period of time. The nonionic surfactant (B) has good water permeability and is an anionic surfactant. (A) can be used in combination with water to dramatically improve water permeability, so that water can spread deep into the roots of the plant and promote growth. Alcohol (C) promotes the speed of water immersion into the culture soil. Can do.

  In addition, the water repellent inhibitor of the present invention is an anionic surfactant by adjusting the mass ratio (A) / (B) of the anionic surfactant (A) to the nonionic surfactant (B) within the above range. Foaming is suppressed when (A) is mixed and dissolved in water. In addition, when the anionic surfactant (A) and nonionic surfactant (B) are mixed and dissolved in water, they may thicken and form a gel, so that they can adhere well to the culture soil. Conceivable. Therefore, it is thought that it is excellent in water permeability, can maintain water-repellent suppression ability for a long period of time, and also suppresses the growth inhibition by an anionic surfactant (A).

  The contents of the anionic surfactant (A), the nonionic surfactant (B), and the alcohol (C) in the water repellent inhibitor of the present invention are not particularly limited, but the anionic surfactant (A) The content is preferably 1 to 50% by mass, and more preferably 5 to 20% by mass. 10-90 mass% is preferable, and, as for content of nonionic surfactant (B), 25-75 mass% is more preferable. When mix | blending alcohol (C), 1-20 mass% is preferable, and, as for the content, 5-15 mass% is more preferable.

  In addition to the anionic surfactant (A), nonionic surfactant (B), and alcohol (C), the water repellency inhibitor of the present invention can be used by blending and diluting water. When water is blended, when the alcohol (C) is blended with the water repellent inhibitor of the present invention, when the anionic surfactant (A) and the nonionic surfactant (B) are mixed and dissolved in the water, thickening, gel It also functions as a state-controlling agent that suppresses the formation of the resin, and can impart good handling properties.

  The water repellent inhibitor of the present invention includes an anionic surfactant other than the above (A), a nonionic surfactant other than the above (B), a cationic surfactant, and an amphoteric interface as long as the effects of the present invention are not impaired. Activators, salts, antifoaming agents, thickeners, thickeners, bactericides, solvents, fragrances, colorants, pH adjusters, fertilizers such as nutrient sources and minerals, and the like can be blended.

  The water-repellent inhibitor of the present invention can be used for water repellency suppression of cultured soil having a water content of 20 to 60% by mass, and the culture soil or soil to which this is attached has a time lag before being used. Even if it occurs, water can be rapidly and uniformly permeated, it has water permeability, can maintain a stable water repellency suppressing ability over a long period of time, and can promote plant growth. When the water content of the culture soil is less than 20% by mass, it becomes difficult to suppress water repellency. Furthermore, the water repellent inhibitor of the present invention can exhibit the permeability even if the moisture content of the culture soil is reduced. That is, the culture soil usually contains about 50% by mass of water, but by incorporating the water-repellent inhibitor of the present invention, water permeation can be achieved even if it is reduced to 20% to less than 40% by mass. A culture soil having properties is obtained. Therefore, even if chemical fertilizer is added to the culture soil, the original function of the fertilizer can be exhibited without alteration, and the weight can be reduced. Can do.

  Furthermore, the water-repellent inhibitor of the present invention can also be used to suppress water repellency of soil, and can be sprayed directly on the surface of the land to be planted (soil) or mixed with a small amount in the soil to suppress water repellency. Can be exhibited.

(Cultured soil)
The culture soil of the present invention has a water content of 20 to 60% by mass with the water repellent inhibitor of the present invention attached to the culture soil component. By attaching the water-repellent inhibitor of the present invention to the culture soil component, even if a time lag occurs until it is used, water can permeate quickly and uniformly, has water permeability and is stable over a long period of time. It can maintain the water repellency inhibiting ability and promote the growth of plants. Furthermore, it has permeability even if the moisture content is reduced.

  In the culture soil of the present invention, the amount of adhesion of the water repellent inhibitor of the present invention is determined in terms of effective amount (total amount of anionic surfactant (A), nonionic surfactant (B) and alcohol (C)). It is preferable that it is 0.01-10 mass parts with respect to 100 mass parts of earth components, More preferably, it is 0.01-5 mass parts.

  As a method for attaching the water repellent inhibitor of the present invention to the culture soil component, a method usually used for attaching an additive for water repellency suppression to the culture soil component can be appropriately employed. That is, when the water-repellent inhibitor of the present invention is liquid at room temperature, it can be used as a stock solution, and when it is solid or pasty at room temperature, it can be heated and melted and used as a liquid, or water is blended. Further, the water repellent inhibitor of the present invention can be used as an aqueous solution. The water repellency inhibitor of the present invention in these forms is applied to the culture soil component by spraying or the like, or the culture soil component is immersed in the water repellency suppression agent of the present invention, etc. An inhibitor can be deposited. The water repellent inhibitor of the present invention is preferably an aqueous solution containing water from the viewpoint of handling properties and uniform adhesion to the culture soil component, and is excessively treated by drying after the treatment to the culture soil component. The water may be removed.

  In the culture soil of the present invention, the culture soil component to be used is not particularly limited as long as it is normally used as the culture soil. For example, a plant fibrous material, an inorganic material having a porous structure, Non-porous structure inorganic materials, fertilizers, soils, etc. may be mentioned. These may be used alone or in combination of two or more.

The culture soil of the present invention preferably contains at least one selected from the following (i) to (iii) as a culture soil component from the viewpoint that the effects of the present invention are remarkably exhibited:
(I) at least one vegetable fibrous material selected from peat moss, coconut husk, rice bran, sawdust, bamboo flour, bagasse, peat, and grass charcoal;
(Ii) at least one porous inorganic material selected from vermiculite, attapulgite, diatomaceous earth, sepiolite, zeolite, and perlite;
(Iii) An inorganic substance having at least one non-porous structure selected from quartz sand, sea sand, alumina sand, talc, and calcium carbonate.

  Examples of the fertilizer of the culture soil component include nitrogen fertilizer, phosphate fertilizer, potash fertilizer, calcium compounds such as calcium hydroxide, magnesium compounds such as magnesium hydroxide, zinc compounds such as zinc oxide, and the like. These may be used alone or in combination of two or more.

  Examples of the soil of the cultured soil component include natural soils such as Kuroboku soil, Akadama soil, Kanuma soil, Hyuga soil, and Ta soil. These may be used alone or in combination of two or more.

  The culture soil of the present invention is obtained by adhering the water-repellent inhibitor of the present invention to at least one of the culture soil components. Among the culture soil components, plant fibrous materials and porous inorganic materials In addition, it is preferably a culture soil in which the water repellent inhibitor of the present invention is attached to at least one selected from inorganic substances having a non-porous structure. For example, mixed with a water-repellent inhibitor of the present invention on a vegetable fibrous material and mixed with an inorganic material with a porous structure, an inorganic material with a non-porous structure, fertilizer, soil, etc. to form a culture soil Thus, the present invention is prepared by mixing one of the culture soil components with the water repellent inhibitor of the present invention attached to another culture soil component not having the water repellent inhibitor of the present invention attached thereto. Even when used as a culture soil, the water-repellent effect can be exerted.

EXAMPLES Hereinafter, the present invention will be described in more detail with reference to examples. However, the present invention is not limited to these examples. In addition, the compounding quantity shown in Table 1 and Table 2 represents a mass part.
<Preparation of water repellent inhibitor>
The water repellent inhibitor was obtained by mixing and stirring the various components shown in Tables 1 and 2 at room temperature.

<Manufacture of culture soil>
The amount of water-repellent inhibitor shown in Table 1 and Table 2 in terms of effective amount (parts by mass) and the culture soil with respect to 100 parts by mass of the culture soil mixed and stirred at the culture soil components and mass ratios shown in Table 1 and Table 2. The water-repellent inhibitor was appropriately dissolved or diluted with water so that the amount of water in the medium would be, and mixed and stirred while spraying to produce a culture soil to which the water-repellent inhibitor was attached.

  When the water repellent inhibitor was dissolved or diluted with water, the viscosity of the diluted aqueous solution was increased and gelled, and the handling property of foaming was observed and evaluated in three stages: ○: good, Δ: slightly bad, and x: bad. The results are shown in Tables 1 and 2.

  In addition, the culture soil 120 days after manufacture is a culture bag filled with culture soil after the manufacture, sealed and stored at 30 ° C. Moreover, the description of (after) in Table 2 used what mixed the culture soil component 120 days after manufacture, without attaching a water-repellent inhibitor to the said culture soil component.

<Inundation speed>
A fixed amount of culture soil was filled into a standard cell tray (30 squares, 128 holes) of the Ministry of Agriculture and Water using a seeding machine, and the fixed amount was irrigated. The time until the water is submerged in the culture soil (the state where there is no water floating) is observed in four stages: ◎: within 3 seconds, ○: within 5 seconds, Δ: within 10 seconds, x: over 20 seconds evaluated. The results are shown in Tables 1 and 2.
The 50th time is an evaluation result on the 50th day after irrigating a certain amount once a day.

<Water permeability>
A fixed amount of culture soil was filled into a standard cell tray (30 squares, 128 holes) of the Ministry of Agriculture and Water using a seeding machine, and the fixed amount was irrigated. After 1 minute of irrigation, the culture soil was dug up with a spatula and the water permeability of the whole was observed and evaluated in four stages: ◎: 90% or more, ○: 70% or more, △: 50% or more, ×: 30% or less. did. The results are shown in Tables 1 and 2.
The 50th time is an evaluation result on the 50th day after irrigating a certain amount once a day.

<Growth>
After filling a certain amount of culture soil into a standard cell tray (30 squares, 128 holes) of the Ministry of Agriculture and Water using a seeding machine and spreading, seeds of komatsuna are sown once again per seed using a seeder. The seeding operation was completed by covering with a certain amount of culture soil and irrigating a certain amount. After sowing, the seedlings are irrigated once a day to raise seedlings, and after 7 days, germination rate, rooting status, and cotyledon development status are observed in three stages: ○: good, Δ: slightly bad, x: bad evaluated. The results are shown in Tables 1 and 2.

Claims (4)

A water repellent inhibitor used for suppressing water repellency of cultured soil having a water content of 20 to 60% by mass, or containing the following anionic surfactant (A) and nonionic surfactant (B) And a water repellent inhibitor having a mass ratio represented by (A) / (B) of 0.01 to 5.00:
(A) at least one anionic surfactant selected from sulfonate type and sulfate type; and (B) polyoxyalkylene glycol, polyoxyalkylene alkyl ether, polyoxyethylene alkylphenyl ether, polyoxyethylene styrenation At least one nonionic surfactant selected from phenyl ether, polyoxyethylene (cured) castor oil, polyoxyethylene alkylamine, and fatty acid alkanolamide.   Furthermore, at least one alcohol selected from a monohydric alcohol having 1 to 8 carbon atoms, a dihydric alcohol having 1 to 8 carbon atoms, a trivalent alcohol having 1 to 8 carbon atoms, and an alkoxy alcohol having 2 to 8 carbon atoms ( The water-repellent inhibitor of Claim 1 containing C).   A culture soil having a water content of 20 to 60% by mass, wherein the water repellent inhibitor according to claim 1 or 2 is adhered to a culture soil component. The culture soil according to claim 3, comprising at least one selected from the following (i) to (iii) as a culture soil component:
(I) at least one vegetable fibrous material selected from peat moss, coconut husk, rice bran, sawdust, bamboo flour, bagasse, peat, and grass charcoal;
(Ii) at least one porous inorganic material selected from vermiculite, attapulgite, diatomaceous earth, sepiolite, zeolite, and perlite;
(Iii) An inorganic substance having at least one non-porous structure selected from quartz sand, sea sand, alumina sand, talc, and calcium carbonate.