JP5825909B2 - Plant growth medium - Google Patents

Description

  The present invention relates to a plant growth medium with high productivity and a method for producing the same.

  In soil culture, there are soil diseases, continuous cropping failures, etc., so solid medium cultivation such as isolated bed cultivation and rock wool cultivation isolated from soil has been introduced.

  Solid media used for solid media cultivation are roughly classified into organic media and inorganic media. Examples of the organic medium include crushed coconut shells, peat moss, and burgers, and examples of the inorganic medium include rock wool, gravel, volcanic gravel, and fired porous material.

  By the way, in conventional ground cultivation, although water and nutrients are generally supplied separately, intake of water and nutrients occurs simultaneously. Plants take nutrients from soil solutions from the stream of transpiration of water, so the supply of water and nutrients should be considered simultaneously. Therefore, in order to obtain healthy growth of plants, it is necessary to supply a nutrient solution of an appropriate quality and quantity when necessary.

  For this reason, the nutrient solution cultivation system that performs drip irrigation using a liquid fertilizer mixing machine in solid medium cultivation is equipped with a liquid fertilizer mixing machine, a solenoid valve, a timer, a water meter, a moisture sensor, and the like. In order to obtain growth, yield and quality, growth control is performed by liquid supply management.

  In recent years, independent pot cultivation in which the root area is independently grown in pots having a capacity of about 1 L to 6 L in cultivation of tomatoes has attracted attention. In the independent pot cultivation, a porous body or the like that is baked at a high temperature of 1000 ° C. or higher after granulating peat moss, coconut shell crushed material, a mixture thereof, or clay is used. This independent pot cultivation is a hydroponic cultivation in which drip irrigation is performed using a liquid fertilizer mixing machine in solid medium cultivation, and because it is a small amount medium cultivation with a restricted root area, growth control is easy and grass power control is also possible. Easy. This is a factor that can increase the planting density. In addition, the conventional underground cultivation is 2,000 to 2,500 shares / 10a, 2 crops / year, but the three-stage dense planting is 6,250 shares / 10a, or the first-stage dense planting is 8,000 to 10,000 shares / 10a, 4 to 4 It has been reported that it is possible to grow 5 crops / year.

  For this reason, since seedlings are required in a large amount of 10 times the conventional amount, cheap seeds and highly productive plant growth media are required. The plant growth medium as used herein refers to a medium for growing plants, including a medium used for sowing.

By the way, conventionally, a plant growth medium has been developed.
Patent Document 1 cultivates a medium having a water retention characteristic of a moderately low effective water content of pF 2.0 or less and a high effective water content of pF 2.0 to 3.2 isolated from the surrounding soil. Disclosed is a method for plant cultivation by hydroponics, which comprises planting a plant to be planted and supplying water or liquid fertilizer for cultivation. Note that pF represents the strength with which water is sucked into the soil as a logarithm of the height of the water column corresponding to the suction pressure. In Patent Document 1, as a medium to be used, a medium containing water purification plant generation soil having a particle size of 0.1 mm or less and 5 volume% or more and 50 volume% or less, or a medium composed of water purification plant generation soil, Berg compost and peat moss. Are listed.

  Patent Document 2 discloses light aggregates such as aggregated zeolite with light bulk specific gravity, excellent water retention, dispersibility with light materials, and suitable for raising seedlings, and light materials such as aggregated zeolite and peat moss. Disclose the seedling culture soil containing

  Furthermore, Patent Document 3 has a sustained water-repellent effect, has excellent storage stability, and is an ultralight soil material. Water-repellent organic materials such as peat moss, powdered clay minerals such as zeolite, and the like by heating. A highly water-absorbing lightweight soil produced by adding and mixing a binder consisting of a water-soluble polymer material to be insolubilized, mixing, and heating and drying at a temperature of 70 ° C to 150 ° C until the water content is 10% by weight or less. Disclose.

JP2003-92924 JP 2000-336356 A Japanese Patent Laid-Open No. 2005-341898

  A solid medium used for solid medium cultivation has three phases of a solid phase, a gas phase, and a liquid phase, and a three-phase distribution that balances aeration and water retention is optimal for plant cultivation. In addition, as an example of the three phases of the coconut shell pulverized material mainly used for independent pot cultivation, solid phase 6%, gas phase 28% and liquid phase 66% can be mentioned.

  “Development of Tomato Independent Pot Cultivation System” (Masharu Yasuda, Kaneyuki Koshikawa, Naoki Katsuyama, Gifu Agricultural Technology Center Research Report, 2009, Vol. 9, pp. 11-16) It is described that pots using other than non-woven fabric are not used because of poor drainage. That is, it is suggested that the coconut shell crushed material has a low gas phase rate and needs to improve air permeability. Furthermore, the occurrence of moss and crystals of nutrient solution are observed around the side of the pot, impairing the air permeability of the nonwoven fabric.

  On the other hand, regarding a cultivation method in which a rigid porous medium is charged and drip irrigation using a liquid fertilizer mixing machine, Patent Document 1 is difficult to stably produce tomatoes, melons, and the like with relatively high sugar content. It is described that the yield is greatly reduced due to extremely high water stress (paragraph numbers “0007” and “0008”). Furthermore, “Utilization of Soil-fired Porous Material as a Medium for Tomato Hydroponic Culture” (Naoki Oishi, Toshimi Kosugi, Kazuo Saito, Shizuoka Prefectural Agricultural Experiment Station Research Report No. 42 (1997)) It describes that it is difficult to suppress the growth of stem diameter and the like unless the water supply amount is significantly reduced because the water retention rate is high.

  Therefore, in view of the above-described circumstances, an object of the present invention is to provide a plant growth medium that allows stable production of plants and that can easily control moisture.

  As a result of diligent research to solve the above-mentioned problems, a material with a curved surface as a physical component is used as a base material, and a workpiece filled with organic material and / or inorganic material in the concave of the material is breathable and water-retaining It was found that the plant growth medium is excellent in both, and the moisture control is easy, and the present invention has been completed.

The present invention includes the following.
(1) A plant growth medium containing a material having a curved surface as a physical component as a substrate and an organic material and / or an inorganic material.

  (2) The plant growth medium according to (1), wherein an organic material and / or an inorganic material is filled in a concave of a material having a curved surface as a physical component.

  (3) The plant growth medium according to (1) or (2), wherein the material having a curved surface as a physical component is rice bran or buckwheat.

  (4) The organic material and / or the inorganic material is one or a mixture of two or more selected from the group consisting of an organic material or a pulverized product thereof, a clay mineral or a powdered product thereof, and a mineral or a powdered product thereof, The plant growth medium according to any one of (1) to (3).

  (5) The plant growth medium according to (4), wherein the organic matter or the pulverized product thereof is peat moss or coconut shell crushed material.

(6) The plant growth medium according to (4), wherein the clay mineral is selected from the group consisting of zeolite, bentonite and kaolinite.
(7) The plant growth medium according to any one of (1) to (6), further containing a fertilizer.

  (8) a step of mixing a material having a curved surface as a physical component with an organic material and / or an inorganic material in the presence of water, a step of adding a binder to the mixture, and subjecting the mixture to heat-drying with additive granulation; A method for producing a plant growth medium, comprising:

  (9) The method according to (8), wherein an organic material and / or an inorganic material is filled in a recess of a material having a curved surface as a physical component.

  (10) The method according to (8) or (9), wherein the material having a curved surface as a physical component is a rice bran or a buckwheat.

  (11) The organic material and / or the inorganic material is one or a mixture of two or more selected from the group consisting of an organic material or a pulverized material thereof, a clay mineral or a powdered material thereof, and a mineral or a powdered material thereof, The method according to any one of (8) to (10).

  (12) The method according to (11), wherein the organic substance or pulverized product thereof is peat moss or coconut shell crushed material.

  (13) The method according to (11), wherein the clay mineral is selected from the group consisting of zeolite, bentonite and kaolinite.

  (14) The method according to any one of (8) to (13), including adding a fertilizer in the mixing step.

  According to the present invention, there is provided a plant growth medium having a good balance between aeration and water retention and easy water control. The plant growth medium according to the present invention is an effective medium in the agricultural field, in addition to easy control of moisture, good dispersibility, little disintegration, and no fear of pathogenic bacteria.

It is a schematic diagram of a single grain structure. It is a schematic diagram of a aggregate structure. It is a schematic diagram which shows an example of the plant growth culture medium which concerns on this invention. It is a graph which shows the pF measurement result of the plant growth medium based on this invention of Example 2 and 3.

Hereinafter, the present invention will be described in detail.
Conventionally, organic materials, non-organic materials, or mixed materials thereof have been used as materials for plant growth media. For example, examples of the organic material include peat moss, coconut shell crushed material, and berg. Examples of the non-organic material include clay minerals such as zeolite, bentonite, and kaolinite, and general soil such as red soil, black soil, masa soil, paddy soil, and field soil. In any case, a medium in which aeration and water retention are balanced is optimal for the growth of plants, and the above materials must be configured in a preferable combination for the growth of plants. In addition, soil is divided into small soil particles called single grain structure and aggregate structure consisting of large and small soil lump. Schematic diagrams of single grain structure and aggregate structure are shown in FIGS. 1 and 2, respectively.

  The amount of water retained by the soil in a state where gravity water (gravity runoff) is naturally discharged after 1-2 days after sufficient water is applied to the soil is called the field capacity. The tension is in the range of pF 1.6 to 2.0. Gravity water is drained, and the pores containing gravity water become a gas phase to facilitate ventilation. In addition, the moisture range of pF 1.6 to 2.0 is most easily absorbed by the plant, which makes it difficult to control the plant vigor due to excessive absorption of the nutrient water. Therefore, a moisture range of pF 2.0 to 2.2 or higher is required. In addition, since pF3.2 to 3.3 is a plant growth inhibition point, the amount of water of pF2.0 to 2.2 or less is small, and the plant has a large amount of easily available moisture from pF2.0 to 2.2 to pF3.2 to 3.3. A growth medium is required.

  As can be understood from FIGS. 1 and 2, capillary water having a pF of 2.0 or more is stored in the aggregates, and the gaps between the aggregates become pores filled with air as gravity water (that is, non-capillary water). In the single grain structure, the gap between the grains becomes small and water and air are difficult to pass. On the other hand, the aggregate structure maintains air permeability in relatively large gaps between aggregates, and the internal structure has high water retention due to single grains. That is, the soil of aggregate structure has a condition to become an ideal plant culture medium in which aeration and water retention are balanced. This is the reason that has been said to be the ideal of soil since ancient times.

  As mentioned above, the first condition of a good plant growth medium is to constantly provide the root with sufficient water and oxygen essential for crop growth. In other words, it constantly supplies water and oxygen to the roots through the pores. In other words, the plant growth medium must be balanced between aeration and water retention. In addition to this first condition, the conditions required for the plant growth medium include good dispersibility, less disintegration, and no worry about pathogenic bacteria.

  These are the conditions required for the plant growth medium, and the materials conventionally used for searching for a new medium are divided into the following four structures by macroscopic judgment using the structural unit as a structural unit.

(1) Single grain structure: zeolite, bentonite, kaolinite, red soil, black soil, masa soil, paddy soil, field soil, etc.
(2) Porous structure (bulk): calcined porous body, reki, volcano reki
(3) Plate structure: Berg, vermiculite
(4) Rod-like (thread-like) structure: peat moss, coconut shell crushed material Next, the materials of the above (1) to (4) are considered as follows.

  With regard to the single grain structure of (1), as described above, the gap between the grains becomes small and water and air hardly pass. As a countermeasure, even when particles of different sizes are mixed, the dispersibility deteriorates.

  With regard to the porous structure of (2), as described in Patent Document 1, it is difficult to stably produce tomatoes, melons and the like having a relatively high sugar content, and the plant is subjected to extremely strong water stress, yield. There is a significant decrease.

  (3) As for the plate-like structure, it is known that Berg needs to be careful because there are differences in quality depending on the type of bark and the deposition period. Vermiculite is widely used as a medium material because it has both high fertilizer and water retention, good air permeability, and is light, but it is known that its structure tends to collapse. If the structure collapses, the above characteristics will not appear.

  (4) Regarding the rod-like (filamentous) structure, it is suggested that the coconut shell crushed material has a low gas phase rate and needs to improve air permeability. It is known that peat moss has higher water retention and poor air permeability than coconut shell cracks. Such a negative cause is that the volume is expanded or contracted by wet drying because the shape is easily changed due to poor mechanical strength. In other words, the pores formed by the combination of the water absorption property of the material itself and the material serve as water retention. The plant growth medium, because the material forms a solid phase, secondary gas phase and liquid phase is formed, the shape changes because of poor mechanical strength, if there is a volume expansion due to water absorption, The gas phase rate is not guaranteed.

  As a result of consideration of the characteristics of the materials (1) to (4), there are advantages and disadvantages with a single material, so that as disclosed in Patent Document 1, water generation plant soil, burg compost, peat moss Etc. are used. However, for example, in the process of mixing the organic material and the clay mineral, the dispersibility is lowered due to the difference in bulk specific gravity or the difference in particle size, resulting in variations in plant growth. That is, it does not match the conditions of a homogeneous and highly productive plant growth medium.

  Considering the problems of a single material from the above, the plant growth medium of the powder mixture type makes it possible to stably produce the plant which is the object of the present invention, and the moisture control is easy. Does not meet the conditions of the plant growth medium.

  Therefore, the present invention aims to provide a plant growth medium that enables stable production of plants and allows easy control of moisture, and as a result of earnest research, the material has a curved surface as a physical component. It has been found that a processed product in which a concave portion of the material is filled with an organic material and / or an inorganic material is excellent in both air permeability and water retention, and is easy to control moisture.

  The plant growth medium according to the present invention contains a material having a curved surface as a physical component as a base material, an organic material and / or an inorganic material, and the organic material and / or the inorganic material has a curved surface as a physical component. The material is filled in the recess. The plant growth medium according to the present invention has a structure in which pores exist between the particles and the air permeability and water retention are compatible because the substrate has a curved surface. In addition, since the base material has a curved surface and the concave portion of the base material is filled with an organic material and / or an inorganic material, the collapse of the particle structure of the plant growth medium according to the present invention is reduced. . Furthermore, the particles of the plant growth medium according to the present invention are excellent in dispersibility because of little difference in bulk specific gravity and particle size.

  Here, the material having a curved surface as a physical component means a material having a curved surface and having a concave portion (intruded portion). Examples of the material having a curved surface as a physical component include synthetic materials such as plastic, natural materials such as rice straw (for example, rice and wheat rice), buckwheat, and the like, but rice flour and buckwheat are preferred.

  Boiled rice is a material that has a relatively high C / N ratio (carbon / nitrogen ratio) of about 70 and does not rot easily. If the rice bran is used as it is, it causes nitrogen starvation and also contains germination inhibitors such as abscisic acid and momilactone phenol, which causes germination failure and withering. Therefore, the rice bran cannot be used as a medium as it is. Therefore, rice straw is used for cultivation after washing and decomposing germination inhibitors by washing with water, fermentation, carbonization and ashing. Furthermore, the rice bran is excessively excellent in drainage, but is poor in water retention and fertilizing power, so even when mixed with clay minerals and other organic substances, it lacks dispersibility due to different specific gravity. For this reason, the mixing ratio is limited and cannot be used in large quantities.

  However, rice bran with a curved surface as a physical component has high mechanical strength, and even if it is a fragment, it has a bay shape or a boat shape, and its shape changes very little. This property can be a mitigating factor for changes in the gas phase rate of the medium.

  The present inventor has conventionally used rice crackers through water washing, fermentation, carbonization and ashing processes, but these processes weaken the mechanical strength of rice straw and cause changes in the gas phase rate. Therefore, we paid attention to the use of rice bran without these steps.

  On the other hand, examples of the organic material include organic matter or a pulverized product thereof, and peat moss and coconut shell crushed material are particularly preferable.

  Examples of inorganic materials include clay minerals or powders thereof, minerals or powders thereof, and the like. Examples of clay minerals or powdered materials thereof include zeolite, bentonite, kaolinite, and powdered materials thereof. Examples of minerals or powders thereof include igneous rocks, sedimentary rocks, metamorphic rocks, and general soil.

  The organic material and the inorganic material may be used alone, or a mixture of two or more kinds may be used. For example, a mixture of peat moss or coconut shell crushed material and zeolite can be used as a mixture of an organic material and an inorganic material.

  The plant growth medium according to the present invention may contain a fertilizer (for example, a fertilizer component such as nitrogen, phosphoric acid, or potassium), a microorganism having resistance to phytopathogenic fungi, or a component that effectively acts on the growth thereof.

  The plant growth medium according to the present invention comprises a step of mixing a material having a curved surface as a physical component with an organic material and / or an inorganic material in the presence of water, and adding a binder to the resulting mixture, so It can be produced by a method (hereinafter referred to as “the present method”) comprising a step of subjecting to granulation heating and drying.

  First, in this method, a material having a curved surface as a physical component and an organic material and / or an inorganic material are mixed in the presence of water. The mixing ratio of a material having a curved surface as a physical component and an organic material and / or an inorganic material can be appropriately determined in order to obtain desired air permeability, water retention, drainage, and bulk specific gravity. In the case of using Momiji as a material having a curved surface as a physical component and using a mixture of peat moss and powdered zeolite as an organic material and / or an inorganic material, for example, a volume ratio of 1: 1 to 1: , 10 vol% (vol%) of powdered zeolite with respect to the mixture of Momiji and peat moss, and 20 vol% of water with respect to the mixture (total amount) of Momiji, peat moss and powdered zeolite (total amount), In the presence of water. Mixing can be performed by, for example, a concrete mixer, and the organic material and / or the inorganic material is sufficiently filled (inserted) into the concave portion of the material having a curved surface as a physical component, for example, at room temperature for 10 minutes. Done about. In addition, when an additional component such as fertilizer is included, an additional component may be added to the mixture of a material having a curved surface as a physical component and an organic material and / or an inorganic material in the mixing step, and mixing may be performed. preferable.

  Next, in this method, a binder is added to a mixture of a material having a curved surface as a physical component, an organic material, and / or an inorganic material, and subjected to additive granulation heating drying. Examples of the binder to be used include known binders that are water-soluble polymer materials that are insolubilized by heating, and examples thereof include polyvinyl alcohol, carboxymethyl cellulose, methyl cellulose, hydroxyethyl cellulose, polyacrylamide, polyacrylic acid, and starch. For example, the binder is added to the mixture of the material having the curved surface as a physical component and the organic material and / or the inorganic material in an amount of 3 to 5 kg with respect to 500 L of the mixture. Here, the attached granulation molding heat drying means a process of mixing each material, a granulation molding and a drying process. That is, in the additive granulation molding heat drying step, the raw materials are mixed and granulated molding and drying are performed. The attached granulation molding heat drying can be carried out with a rotary kiln, granulator or the like until the product temperature is 70 to 150 ° C. (preferably 100 to 120 ° C.) and the water content becomes 10% by weight (wt%).

  In this way, the plant growth medium according to the present invention can be produced by this method. In this method, by drying to a moisture content of less than 10 wt% in the impregnation granulation heating drying, there is less degradation or alteration of fertilizer components and microorganisms by the plant growth medium according to the present invention, and preservation of the plant growth medium according to the present invention. Sexuality can be increased.

  Moreover, additional components, such as a fertilizer, can also be suitably added and used for the plant growth culture medium which concerns on this invention.

  Furthermore, the plant growth medium according to the present invention is a plant growth medium in which an excessive gravity water area in the vicinity of pF0 to 2.0 is reduced, an easily effective moisture in the pF2.2 to 3.3 area is increased, and a balance between aeration and water retention is achieved. It is effective as a medium in hydroponics such as solid medium cultivation and independent pot cultivation. Further, in the plant growth medium according to the present invention, the base material has a curved surface, and the organic material and / or the inorganic material is filled in the concave portion of the base material, so that there is less interference, and the structure The collapse of is reduced. Therefore, the user can obtain the plant growth medium according to the present invention without collapsing during transportation or the like, and can keep the structure constant during the period of use and maintain the performance as a medium. Furthermore, the particles of the plant growth medium according to the present invention are excellent in dispersibility because of little difference in bulk specific gravity and particle size.

  EXAMPLES Hereinafter, although this invention is demonstrated in detail using an Example, the technical scope of this invention is not limited to these Examples.

[Example 1] Production of plant growth medium according to the present invention 250 l of pear moss and 20 kg of powdered zeolite were mixed with 250 l of pear moth in the presence of 100 L of water at room temperature for 10 minutes. Next, 3 kg of polyvinyl alcohol was added and further mixed, and the mixture of peat moss and powdered zeolite entered into the recesses of the rice bran by performing addition granulation molding heating and drying using a rotary kiln until the moisture content was 10 wt% at 120 ° C. A processed product (corresponding to “plant growth medium according to the present invention”) was produced.
A schematic diagram of the plant growth medium according to the present invention produced as described above is shown in FIG.

[Examples 2 and 3] pF measurement evaluation of plant growth medium according to the present invention Coconut shell crushed material and powdered zeolite are mixed with rice bran in the presence of water, polyvinyl alcohol is added, and the mixture is further added, followed by addition granulation molding heating By subjecting to drying, a processed product (corresponding to “plant growth medium according to the present invention”) in which a mixture of coconut shell crushed material and powdered zeolite was introduced into the depression of the rice cracker was produced. In Example 2, a volume ratio of 2: 1 was used for the cracked rice and the coconut shell, and in Example 3, a volume ratio of 1: 1 was set for the volume of the rice cracker and the coconut shell to make a total of 500 L. 20 kg was mixed for 10 minutes at room temperature using a concrete mixer in the presence of 100 L of water. The amount of polyvinyl alcohol added to these mixtures was 3 kg. Further, the impregnation granulation heating drying was performed using a rotary kiln until the water content became 10 wt% at a product temperature of 120 ° C.

  PF0 to 3.3 of the obtained plant growth medium according to the present invention were measured by a pressure method, and pF3.3 to 7.0 were measured by a centrifugal method (manufactured by Dairika Chemical Co., Ltd.).

  Table 1 and FIG. 4 show the pF measurement results of the plant growth medium according to the present invention, which has been heat-dried by granulation molding. In addition, Table 1 and FIG. 4 also show the pF measurement results of the rice crackers and pulverized rice cakes. FIG. 4 shows the volumetric water content (% v / v) depending on the difference in pF value. In FIG. 4, the vertical axis represents the volumetric water content (% v / v), and the horizontal axis represents the pF value. In addition, in FIG. 4, the location of the arrow shows the easy effective water | moisture content of a rice cracker and a rice cracker ground material. Table 1 shows the moisture content (vol%) in each measured pF range of the pear and the pear ground material and the plant growth medium according to the present invention of Examples 2 and 3 as the base material.

  As understood from Table 1 and FIG. 4, the percentage of water content of pF0 to 2.2 of pear was 87%, and the percentage of moisture content of pF2.2 to 3.3 was 1%. The percentage of water content of pF0 to 2.2 of the ground rice cracker was 83%, and the percentage of water content of pF2.2 to 3.3 was 3%. It was found that both the rice crackers and the rice pulverized product were excessively excellent in drainage and inferior in water retention.

  On the other hand, in the plant growth medium according to the present invention of Examples 2 and 3, both crushed coconut shells and powdered zeolite were mixed in the presence of water, and a binder (polyvinyl alcohol) was added and further mixed, It is a processed product in which a mixture of crushed coconut shells and powdered zeolite enters the depressions of the rice crackers by subjecting them to granulation heating and drying, and pulverized coconut shells to obtain the desired drainage, water retention and bulk specific gravity. It was manufactured by changing the mixing ratio. In the plant growth medium according to the present invention in Example 2, the proportion of water content of pF0 to 2.2 was 58%, and the proportion of water content of pF2.2 to 3.3 was 13%. On the other hand, the proportion of water content of pF0 to 2.2 of the plant growth medium according to the present invention of Example 3 was 52%, and the proportion of water content of pF2.2 to 3.3 was 24%.

  Thus, the plant growth media according to the present invention of Examples 2 and 3 both have an excessive gravity water area near pF0-2.0, an increase in easily effective moisture in the pF2.2-3.3 area, and clearly aeration. It was improved to the conditions required for a plant growth medium with balanced water retention. In addition, by using a rice bran with a stable and uniform particle size and unit structure as a base material, it is possible to easily and uniformly disperse the particle size and unit structure by adding and granulating and heat-dried processed products. It became a plant growth medium. Furthermore, since the chaff from which the base material is bay-shaped and coconut shell cracked material and powdered zeolite are contained in the concave of the chrysanthemum, the particles that have been heat-dried by the attached granulation molding have little interference and do not collapse. There were few.

Claims (6)

A plant growth medium containing a chaff or buckwheat as a base material and an organic material and / or an inorganic material, wherein the organic material and / or the inorganic material is attached to a recess of the chaff or buckwheat by a binder and filled The said plant growth culture medium characterized by the above-mentioned. Organic materials and / or inorganic material, an organic material or a ground product, a clay mineral or a powdery substance and mineral or one or more mixtures selected from the group consisting of the powdery substance, according to claim 1 The plant growth medium as described. The plant growth culture medium of Claim 2 whose organic substance or its ground material is peat moss or a coconut shell cracked material. The plant growth medium according to claim 2 , wherein the clay mineral is selected from the group consisting of zeolite, bentonite and kaolinite. The plant growth medium according to claim 1, wherein the organic material and / or the inorganic material is a mixture of peat moss or coconut shell crushed material and powdered zeolite.   Furthermore, the plant growth culture medium of any one of Claims 1-5 containing a fertilizer.

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