KR100468452B1 - Preparing method of medium for nutrient solution culture using coir and the medium thereof - Google Patents

Abstract

The present invention relates to a method for producing a nutrient solution culture medium using coconut fiber, a medium prepared therefrom and a nutrient solution culture method using the same,

For nutrient solution cultivation using coconut fiber, characterized by mixing 4-5 g of powdery lime fertilizer per liter of coconut fiber having a specific gravity of 0.08-0.1 g / cc and a particle ratio of 2-5% by weight of 0.002-0.25 mm Provided are a method for preparing a medium and a medium prepared therefrom. In addition, the nutrient solution containing Ca (NO ₃ ) ₂ 4H ₂ O 10-15mmole / l, KH ₂ PO ₄ 1-1.5mmole / l and MgSO ₄ 7H ₂ O 1.5-2.5mmole / l to the medium. There is provided a nutrient cultivation method for growing plants.

The method of the present invention uses a coconut fiber having a specific ratio of specific weight and particle diameter and improves chemical properties thereof, thereby making it possible to prepare a nutrient cultivation medium having excellent water retention and breathability, being environmentally friendly, and easy to transport and handle. .

Description

Method for producing nutrient solution culture medium using coconut fiber and medium prepared therefrom {PREPARING METHOD OF MEDIUM FOR NUTRIENT SOLUTION CULTURE USING COIR AND THE MEDIUM THEREOF}

The present invention relates to a nutrient cultivation medium production method using a coconut fiber, a medium prepared therefrom and a nutrient cultivation method using the same.

Conventionally, when nutrient solution is grown, the container culture medium (top soil) uses mainly rock wool, which is an inorganic material, but the rock wool is not only expensive but also difficult to dispose of after use. Although organic cotton peat moss is used as a medium to replace rock wool, peat moss is not easily compressed or molded without the use of a binder, and is already depleted and expensive worldwide.

Meanwhile, coconut fiber is also used as an alternative to rock wool because coconut fiber is organic and has excellent water retention and breathability. However, coconut fiber has high salt and K (cali) concentrations above the appropriate level, C: N ratio is above 80, which is higher than the baseline of 40, and resins, tannins and terpenes, which inhibit plant root growth. terpene) and the like. Therefore, when coconut fiber is used as crop growing soil, the chemical properties of coconut fiber need to be improved or adjusted, but the technology for this is not developed yet.

In addition, because the planting soil has a large volume and is inconvenient to transport and handle, it is necessary to produce the product by compressing the soil and a technology for this is required.

Accordingly, an object of the present invention is to provide a method for producing a nutrient cultivation medium using coconut fiber, which is excellent in water retention and breathability, is environmentally friendly, and is easy to transport and handle.

Another object of the present invention is to provide a medium prepared from the above production method.

Still another object of the present invention is to provide a nutrient cultivation method using the medium.

According to the first aspect of the present invention,

For nutrient solution cultivation using coconut fiber, characterized by mixing 4-5 g of powdery lime fertilizer per liter of coconut fiber having a specific gravity of 0.08-0.1 g / cc and a particle ratio of 2-5% by weight of 0.002-0.25 mm Provided is a method of preparing a medium.

According to the second aspect of the present invention,

Provided is a nutrient cultivation medium using a coconut fiber prepared by the above method.

According to the third aspect of the present invention,

Ca (NO ₃ ) ₂ ㆍ 4H in a medium in which 4-5 g of powdered lime fertilizer is mixed per liter of coconut fiber having a specific gravity of 0.08-0.1 g / cc and a particle ratio of 2-5% by weight of 0.002-0.25 mm Using a coconut fiber characterized in that the cultivation of plants by supplying a nutrient solution containing ₂ O 10-15mmole / l, KH ₂ PO ₄ 1-1.5mmole / l and MgSO ₄ ㆍ 7H ₂ O 1.5-2.5mmole / l Nutrient cultivation methods are provided.

EMBODIMENT OF THE INVENTION Hereinafter, this invention is demonstrated in detail.

The inventors have found that a medium suitable for nutrient cultivation when coconut fiber and lime powder fertilizer having a specific ratio of specific weight and particle size are mixed in an appropriate amount.

According to the method of the present invention, the coconut fiber has a specific gravity of 0.08-0.1 g / cc, a particle diameter of 0.25 mm or less, preferably a particle ratio of 2-5% by weight of a particle diameter of 0.002-0.25 mm. In addition, since these coconut fibers are bulky, they are preferably mixed with lime powder and fertilizer and then compressed.

If the weight of the coconut fiber used in the present invention is 0.08 g / cc or less, it is easy to break during compression, and if the weight of the coconut fiber is 0.1 g / cc or more, the swelling speed is too slow when the compressed medium is swelled again. Not swelling by volume is not desirable.

In addition, the coconut fiber generally uses a particle diameter of 2-5% by weight of 0.25 mm or less, preferably 0.002-0.25 mm or less, which belongs to a fine yarn, and the reason is that Too much or more than 5% by weight or too little or less than 2% by weight reduces the media voids to be filled with moisture or air, resulting in a decrease in moisture content and porosity, resulting in poor drainage and breathability. This is because growth may not be smooth. Moreover, even if it goes too much below 0.002 mm of such a fine yarn, air permeability falls and it is unpreferable.

In addition, the coconut fiber is preferably used that contains less than 6% by weight of coconut fiber particles having a relatively large particle diameter of 2mm or more. As described above, coconut fiber having a large particle size of 2 mm or more is not included in fibers having a large particle size of 2 mm or more due to a decrease in moisture content and porosity. However, most coconut fibers contain fibers having such a particle size, so that a maximum of 6 weight It is preferable to use those contained up to%. More preferably, the coconut fiber is used to include a coconut fiber particle ratio of 0-4% by weight or less having a relatively large particle diameter of 2-4mm. In addition, it is preferable that the coconut fiber does not include particles having a particle size of 0.25-2.00 mm and a particle size smaller or larger than this. More preferably, the coconut fiber comprises a particle ratio of particle size of 0.25-2.00mm 90-92% by weight.

Using such a specific coconut fiber, 4-5g of powdery lime fertilizer per liter of coconut fiber is mixed to prepare a nutrient cultivation medium of the present invention. Coconut fiber is not suitable as a medium for use as it has acidity of pH 5.2-5.5 and low electric conductivity of 0.6-0.7 (dS / m). In addition, since coconut fiber alone lacks the necessary ingredients for plant growth, powdered lime lime fertilizer is mixed to optimize the concentration of lime and goto, which must be contained in the media soil to supplement it. If the powdered lime fertilizer is mixed with less than 4 g of powdered lime fertilizer per liter of coconut fiber, the pH of the medium is too low or the conductivity of the medium is reduced to less than 1 so that it is not suitable as a medium. If lime lime fertilizer of 5g or more is mixed, the pH of the medium is too high or the electrical conductivity of the medium increases to 1 or more, which may cause seed germination and seedling growth, which is not suitable as a medium.

Furthermore, the media thus prepared can be compression molded to facilitate handling and transport, and the compressed media can be swollen back to its original volume by supplying water before use. As a compression method, any general compression molding method may be used and is preferably compressed to an appropriate size according to the size of the pollen. The compression ratio is preferably in the range of 1/8 to 1/10. If it is out of this range, that is, if the compression ratio is less than 1/8, the compressed medium is brittle, and if compressed to more than 1/10, the swelling speed is too slow when swollen.

In addition, Ca (NO ₃ ) ₂ ㆍ 4H ₂ O 10-15mmole / l, KH ₂ PO ₄ 1-1.5mmole / l and MgSO ₄ · 7H ₂ O in the nutrient cultivation medium of the present invention so that the crops grow well without nutrient deficiency. It is preferable to supply a nutrient solution containing 1.5-2.5 mmole / l.

Coconut fiber and lime fertilizer alone lack the necessary ingredients for plant growth, and thus it is necessary to supply the nutrient solution prepared as described above containing 13 elements essential for plant growth.

Coconut fiber alone is lower than the appropriate level of Ca, Mg and N, and instead, the concentration of cations such as K, Na, etc. far exceeds the appropriate value, so if the chemical properties are not controlled, it is not suitable for the medium raw material. Therefore, Ca (NO ₃ ) ₂ ㆍ 4H ₂ O 10-15mmole / l, KH ₂ PO ₄ 1-1.5mmole / l and MgSO ₄ • It is necessary to supply 7H ₂ O 1.5-2.5mmole / l. If the above components are supplied outside of these ranges, the main elements (N, P, K, Ca, Mg and S) essential for plant growth are not preferable because they are deficient or exceeded in the medium. In addition to the above components, other trace elements may also be included. For example, trace elements such as in Hoagland or PTG nutrient solutions may be included. In one embodiment, the nutrient cultivation medium of the present invention includes components as shown in Table 1 below.

Fertilizer ingredients Concentration (mmole / l) Ca (NO ₃ ) ₂ ㆍ 4H ₂ O 12.0 KH ₂ PO ₄ 1.3 MgSO ₄ ㆍ 7H ₂ O 2.0 Other trace elements Hogland Nutrient Standard

The nutrient solution thus prepared may be included with the production of the medium of the present invention, and nutrient solution may be cultivated by periodically supplying the nutrient solution to the medium of the present invention during plant cultivation.

Hereinafter, the present invention will be described in detail through examples.

Example

Example 1

The proper particle ratio of coconut fiber to provide the physical properties, volume water content (Pv) and air filling porosity (Ea) suitable for nutrient cultivation medium (top soil) was investigated.

The volumetric water content and air filling porosity of the coconut fiber having particles having a particle diameter of 0.25 mm or less and distributed at 2.0%, 3.8% and 5.6%, respectively, are shown in Table 2 below. The porosity, volume water content and air filling porosity of the coconut fiber were calculated as follows. Total porosity-E, volumetric moisture content-Pv, and air-filled porosity-Ea of the medium were calculated by the following equation.

Total porosity (E) = [1- (ρb / ρr)] × 100

ρb = weight of coconut fiber (g / c.c)

ρr = particle density of coconut fiber ρr = 1.6 g / c.c

Volume Water Content (Pv) = (Wg-Wc) / Vb × 100

Wg = weight when coconut fiber maintains container capacity

Wc = building of coconut fiber

Vb = volume of coconut fiber

Air filling porosity (Ea) = E-Pv

Particle size distribution below 0.25mm (%) Volume water content (Pv,%) Air filling porosity (Ea,%) 2.0 84.0 11.5 3.8 83.2 10.8 5.6 80.0 6.8

In general, the volume water content (Pv) suitable for the culture medium for the container is more than 80%, the air filling porosity (Ea) is more than 10%, as can be seen from Table 2 particles having a particle diameter of 0.25mm or less 5% In the case of the coconut fiber, the air filling porosity was low at 6.8%, resulting in poor porosity. In addition, when the particles having a particle diameter of 2.0 mm or more were 5% by weight or more, the volume water content was reduced to 80% or less and the air filling porosity was excessively increased, which was not suitable.

Example 2

Coconut fiber mixed with powdered lime fertilizer 0-5g in 1 liter of coconut fiber with particles of 0.25mm or less and 5% or less, pH and electrical conductivity (EC) were measured after 24 hours and the results are shown in Table 3 below. .

Lime High Fertilizer (g / l) pH Conductivity (dS / m) 0 5.2 0.7 3 5.7 0.8 4 5.8 1.0 5 6.0 1.2

* Note-pH titration of medium: pH 5.8-6.3, conductivity of medium is 1.0-1.2dS / m

As shown in Table 3, when 1L of coconut fiber was mixed with lime lime fertilizer 4-5g, the pHs were 5.8 and 6.0, which are appropriate pHs of the medium, and the electrical conductivity was 1.0 and 1.2dS / m. In the case of mixing less than 4g, both the pH and the electrical conductivity were outside the optimum values.

Example 3

In general, the concentration of the main elements (N, P, K, Ca, Mg, S) contained in the coconut fiber was analyzed, and the nutrient solution composition (Ca (NO ₃ ) ₂ ㆍ 4H ₂ O? mmole / l, KH ₂ PO ₄ -mmole / l and MgSO ₄ .7H ₂ O -mmole / l), which eventually gave N 336 ppm, P 40 ppm, K 51 ppm, Ca 480 ppm, Mg 50 ppm and S 64 ppm to the medium. It was made. In particular, N and Ca contained relatively less in coconut fiber than titration medium increased to N 336ppm and Ca 480ppm, respectively, whereas K contained in large amount in coconut fiber rather than titration medium was supplied in 51ppm. . These feeds are summarized in Table 4 below with the appropriate concentrations of major elements in the medium.

Unit: ppm Major element In general, the concentration of main elements in coconut fiber Additional supply concentration Final concentration Proper concentration N 1.3 336 337.3 120-450 P 37.4 40 77.4 50-230 K 340 51 391 220-460 Ca 12.5 480 492.5 120-640 Mg 5.0 50 55 0-70 S 27.3 64 91.3 70-350

As shown in Table 4, although the coconut fiber itself contains some of the major elements required for nutrient cultivation, it can be seen that the nutrient solution composition according to the present invention maintains an appropriate concentration as a nutrient medium.

Example 4

4 g of powdered lime fertilizer was mixed per liter of coconut fiber, and then compression molded in various ratios of 1 / 4-1 / 12 using a circular mold to prepare a compression disk, and the required pressure was measured.

As a result of the compression test, when the compression molding was performed between 1/8 and 1/10, it was possible to manufacture a sufficiently hard compression disk without using a binder. The pressure required for 1/8 compression was 32-35kg / ㎠ and 1/10 compression The pressure required for was 45 kg / cm 2. Also, compressed disks compressed to less than 1/8 tended to break easily.

As such, when the compressed disk was compressed into a pot (or plastic bag) again and filled with water by filling the container, the compressed disk compressed to 1/10 or more showed a problem in that the water absorption and swelling speed were too slow.

The nutrient solution culture medium using the coconut fiber of the present invention through the compression experiment can be easily transported by greatly reducing the volume, thereby saving the transportation cost, and can be simply swollen to its original state by supplying it to the container again. It is easy to use.

According to the present invention, it is possible to prepare a nutrient cultivation medium using coconut fiber, which has excellent water retention and breathability, is environmentally friendly, and is easy to transport and handle.

Claims (7)

For nutrient solution cultivation using coconut fiber, characterized by mixing 4-5 g of powdery lime fertilizer per liter of coconut fiber having a specific gravity of 0.08-0.1 g / cc and a particle ratio of 2-5% by weight of 0.002-0.25 mm Medium production method. The method of claim 1, wherein the coconut fiber is a nutrient solution culture medium using a coconut fiber, characterized in that the fiber particles having a particle diameter of 2mm or more up to 6% by weight. The method of claim 1, wherein the coconut fiber is a nutrient solution cultivation medium using a coconut fiber, characterized in that the particle ratio of the particle size of 0.25-2.00mm 90-92% by weight. According to claim 1, wherein the medium is nutrient solution cultivation medium using a coconut fiber, characterized in that the compression molding in a volume ratio of 1 / 8-1 / 10. The method of claim 1, further comprising Ca (NO ₃ ) ₂ .4H ₂ O 10-15mmole / l, KH ₂ PO ₄ 1-1.5mmole / l and MgSO ₄ .7H ₂ O 1.5-2.5mmole / l Method for producing a nutrient cultivation medium using a coconut fiber, characterized in that the supply. Nutrient cultivation medium using a coconut fiber prepared by the method according to any one of claims 1 to 5. Ca (NO ₃ ) ₂ ㆍ 4H in a medium in which 4-5 g of powdered lime fertilizer is mixed per liter of coconut fiber having a specific gravity of 0.08-0.1 g / cc and a particle ratio of 2-5% by weight of 0.002-0.25 mm Using a coconut fiber characterized in that the cultivation of plants by supplying a nutrient solution containing ₂ O 10-15mmole / l, KH ₂ PO ₄ 1-1.5mmole / l and MgSO ₄ ㆍ 7H ₂ O 1.5-2.5mmole / l Nutrient Cultivation Method.