CN102726275B - Urea formaldehyde-acrylic acid compound culture substrate and method for preparing same - Google Patents
Urea formaldehyde-acrylic acid compound culture substrate and method for preparing same Download PDFInfo
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- CN102726275B CN102726275B CN2012101856513A CN201210185651A CN102726275B CN 102726275 B CN102726275 B CN 102726275B CN 2012101856513 A CN2012101856513 A CN 2012101856513A CN 201210185651 A CN201210185651 A CN 201210185651A CN 102726275 B CN102726275 B CN 102726275B
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- acrylic acid
- resin
- urea
- acid composite
- cultivation substrate
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- 239000000758 substrate Substances 0.000 title claims abstract description 31
- -1 Urea formaldehyde-acrylic acid compound Chemical class 0.000 title claims abstract description 13
- 238000000034 method Methods 0.000 title claims abstract description 7
- 229920005989 resin Polymers 0.000 claims abstract description 42
- 239000011347 resin Substances 0.000 claims abstract description 42
- 239000002245 particle Substances 0.000 claims abstract description 36
- 239000004925 Acrylic resin Substances 0.000 claims abstract description 27
- 239000006260 foam Substances 0.000 claims abstract description 27
- 239000000203 mixture Substances 0.000 claims abstract description 20
- 239000007787 solid Substances 0.000 claims abstract description 18
- 239000011148 porous material Substances 0.000 claims abstract description 13
- 239000000463 material Substances 0.000 claims abstract description 11
- 238000002360 preparation method Methods 0.000 claims abstract description 11
- 238000010521 absorption reaction Methods 0.000 claims abstract description 8
- NIXOWILDQLNWCW-UHFFFAOYSA-N Acrylic acid Chemical compound OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims abstract description 6
- 238000005187 foaming Methods 0.000 claims abstract description 6
- 239000004202 carbamide Substances 0.000 claims description 33
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 claims description 27
- 229920000178 Acrylic resin Polymers 0.000 claims description 24
- 239000002131 composite material Substances 0.000 claims description 23
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 22
- 239000011159 matrix material Substances 0.000 claims description 22
- 229920003023 plastic Polymers 0.000 claims description 18
- 239000004033 plastic Substances 0.000 claims description 18
- 238000003756 stirring Methods 0.000 claims description 13
- 229920001807 Urea-formaldehyde Polymers 0.000 claims description 10
- GZCGUPFRVQAUEE-SLPGGIOYSA-N aldehydo-D-glucose Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C=O GZCGUPFRVQAUEE-SLPGGIOYSA-N 0.000 claims description 10
- 238000007334 copolymerization reaction Methods 0.000 claims description 10
- 238000006243 chemical reaction Methods 0.000 claims description 9
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 claims description 7
- 229920000642 polymer Polymers 0.000 claims description 7
- 238000009833 condensation Methods 0.000 claims description 6
- 230000005494 condensation Effects 0.000 claims description 6
- 238000004132 cross linking Methods 0.000 claims description 6
- 239000008187 granular material Substances 0.000 claims description 6
- 239000002994 raw material Substances 0.000 claims description 5
- CERQOIWHTDAKMF-UHFFFAOYSA-M Methacrylate Chemical compound CC(=C)C([O-])=O CERQOIWHTDAKMF-UHFFFAOYSA-M 0.000 claims description 4
- 239000012943 hotmelt Substances 0.000 claims description 4
- 239000000178 monomer Substances 0.000 claims description 4
- 238000000465 moulding Methods 0.000 claims description 4
- 230000008569 process Effects 0.000 claims description 4
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 claims description 3
- 229920002472 Starch Polymers 0.000 claims description 3
- 230000002045 lasting effect Effects 0.000 claims description 3
- 239000007921 spray Substances 0.000 claims description 3
- 235000019698 starch Nutrition 0.000 claims description 3
- 239000008107 starch Substances 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 10
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 239000000835 fiber Substances 0.000 abstract 5
- 238000007664 blowing Methods 0.000 abstract 1
- 238000002844 melting Methods 0.000 abstract 1
- 239000003053 toxin Substances 0.000 abstract 1
- 231100000765 toxin Toxicity 0.000 abstract 1
- 238000004804 winding Methods 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 17
- 241000196324 Embryophyta Species 0.000 description 10
- 239000007789 gas Substances 0.000 description 8
- 235000016709 nutrition Nutrition 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 230000035764 nutrition Effects 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 150000003672 ureas Chemical class 0.000 description 3
- 235000013311 vegetables Nutrition 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 231100000252 nontoxic Toxicity 0.000 description 2
- 230000003000 nontoxic effect Effects 0.000 description 2
- 230000008635 plant growth Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 241000195940 Bryophyta Species 0.000 description 1
- 244000144987 brood Species 0.000 description 1
- 230000005587 bubbling Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000012258 culturing Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 230000012010 growth Effects 0.000 description 1
- 239000000017 hydrogel Substances 0.000 description 1
- 238000005213 imbibition Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000003621 irrigation water Substances 0.000 description 1
- 239000011490 mineral wool Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003415 peat Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000002786 root growth Effects 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000009967 tasteless effect Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000005491 wire drawing Methods 0.000 description 1
Classifications
-
- Y02P60/216—
Abstract
The invention provides a urea formaldehyde-acrylic acid compound culture substrate and a method for preparing the same. The urea formaldehyde-acrylic acid compound culture substrate comprises resin fibers, water-absorbing particles and a solid substrate, wherein the resin fibers are doped in the solid substrate, a lot of gas micropores are distributed in and on the surface of the solid substrate,and the water-absorbing particles are fixed on the pore walls of the gas micropores or dispersed in the gas micropores. The preparation method comprises the steps of hot-melting acrylic acid resin, blowing and pulling the melted acrylic acid resin to obtain resin fibers, and winding the resin fiber to form a flocculent structure; and putting the molded acrylic acid resin fiber in a mold in advance, squeezing foaming matters into the mold to obtain the mixture, curing the mixture in the mold, and simultaneously fixing the high-water absorption resin particles on the foam pore walls or dispersing the high-water absorption resin particles in the gas micropores to form the urea formaldehyde-acrylic acid compound culture substrate material. The urea formaldehyde-acrylic acid compound culture substrate has the advantages of simple production procedure, no toxin, no pollution, environment friendliness and the like, and is convenient to use and transport.
Description
Technical field
The present invention relates to field of plant growing technology, especially relate to a kind of urea aldehyde-acrylic acid composite cultivation substrate and preparation method thereof.
Background technology
Along with the mankind's development, the progress of science and technology, the deterioration of environment increases the weight of, and the mankind more and more pay attention to protecting environment, more and more crave for to be full of green life in the living environment, and the city building stand in great numbers, and green landscape also develops to solid space.The soil that urbanization process breaks away from a lot of people, so many people pursue the rural area, serious day by day food also forces people to seek the self-centered mode that plants vegetables of family to topic.At present mostly be to deal with these problems with soilless culture.
Mostly the vertical planting mode that applies to gardens at present is to adopt certain three-dimensional member to build skeleton, fill matrix such as earth or the peat composed of rotten mosses, rock wool, chad, earth quality for vertical cultivation is too heavy, heavy burden to skeleton requires very high, can increase input later maintenance inconvenience on the other hand on the one hand.Also there is same problem in some matrix of using at present, and moisture rising and loss especially easily, have strengthened the input of water resource and have increased the maintenance management cost simultaneously.Except the gardens vertical planting, aspect solid planted vegetables, some matrix of using must be in conjunction with some vessel or high investment type equipment now, and such as some sophisticated equipments that kitchen garden uses, the purchase cost height is because its limited later stage output in cultivation space is also limited.
The agricultural class uses water-absorbing resin to solve the problem of water conservation aspect, and water-absorbing resin is processed to bulk or graininess more, is used for botanical seedling culturing, drought resisting etc.Aspect vertical planting, do not use water-absorbing resin as yet, and the cultivation field of solid type does not have a kind ofly to have fixedly the cultivation matrix of body can reach plant directly to grow in the above yet, and other auxiliary material of less use are as the member of fixing matrix, the materials such as vessel of splendid attire matrix.
Summary of the invention
The objective of the invention is to design a kind of novel urea aldehyde-acrylic acid composite cultivation substrate, address the above problem.
To achieve these goals, the technical solution used in the present invention is as follows:
A kind of urea aldehyde-acrylic acid composite cultivation substrate, comprise resin silk, water-absorption particle and solid matrix, described resin silk is entrained in described solid matrix inside, and described solid matrix is inner and the surface all is dispersed with a large amount of gas micropores, and described water-absorption particle is fixed on the hole wall of described gas micropore or is scattered in the space of gas micropore.
Described water-absorption particle is the high hydroscopic resin particle, and described resin silk is the acrylic resin silk, and described solid matrix is UF foamed plastics.
Described UF foamed plastics is to be obtained urea-formaldehyde resin solution and mix stirring foaming and curing with expanding foam solution forming by urea and formaldehyde condensation polymer reaction, and the density of described UF foamed plastics is 0.010-0.020g/cm
3
Described acrylic resin silk is synthetic by acrylate and methacrylate monomer copolymerization, and the consumption of described acrylic resin silk is every cubic metre of 3kg-5kg.
Described high hydroscopic resin particle is starch grafted acrylate crosslinking copolymerization composition granule, perhaps acrylamide and acrylic acid salt crosslinking copolymerization composition granule, the perhaps mixture of the two.
The consumption of described high hydroscopic resin particle can be every cubic metre of 2-3kg, and described high hydroscopic resin particle grain size is the 200-800 order.
Described gas micropore is pore structure, and described high hydroscopic resin particle is fixed on the pore wall of described gas micropore.
The preparation method of a kind of urea aldehyde-acrylic acid composite cultivation substrate, the bag step is as follows:
Step 1 is drawn wire the after-blow of acrylic resin hot melt, and is wound in the flocculent structure in space;
Step 2 obtains urea-formaldehyde resin solution by urea and formaldehyde condensation polymer reaction;
Step 3, the preparation expanding foam solution;
Step 4 stirs described expanding foam solution and produces and add described urea-formaldehyde resin solution behind a large amount of foams and continue to stir, and sprays into the high hydroscopic resin particle in the volume of material expansion process, and lasting stirring is foamed into the foam thing;
Step 5, put in type acrylic resin silk in the mold in advance, then described foam thing is clamp-oned mold and obtain mixture, mixture solidifies in described mold, be fixed on the high hydroscopic resin particle on the foam pore wall simultaneously or be scattered in the space of gas micropore, form urea aldehyde-acrylic acid composite cultivation substrate raw material.
Also comprise step 6, described urea aldehyde-acrylic acid composite cultivation substrate raw material size and shape as required cut moulding.
The invention provides a kind of urea aldehyde-acrylic acid composite cultivation substrate and preparation method thereof, this matrix can be used for vertical planting and vegetable soilless culture, thereby solve in the existing soiless and three-dimensional culture because cultivation matrix relies on problems such as vessel or fixed component, solve that existing matrix vertical cultivation plant is fixed, water conservation, nutrition and problem such as aerobic, solve space constraints, solve the technical problem that water-absorbing resin is used for the plant solid growth.And solving the water resource waste problem of using earth or other matrix to cause, the usefulness problem is hanged down in problem of environmental pollution and high investment.
Beneficial effect of the present invention can be summarized as follows:
The UF foamed plastics that the present invention adopts is to be obtained polymer and add expanding foam solution stirring foaming forming by urea and formaldehyde reaction, the acrylic resin silk that adopts is synthetic by acrylate and methacrylate monomer copolymerization, this material surface hardness is moderate, certain mechanical strength is arranged, add the acrylic resin silk, increased intensity, not yielding, this material non-toxic, tasteless, good heat resistance have acidproofly, alkaline-resisting, corrosion-resistant, and green, environmental protection, characteristics such as pollution-free are arranged, and this material is convenient to processing, production cost is low, and is easy to use, also is easy to transportation.The present invention is foamed into UF foamed plastics with urea and formaldehyde reaction adding expanding foam solution, add the acrylic resin silk, and bubbling air is more conducive to form hole, the solid structure energy conduct of this foamed plastics is the carrier of plant fixedly, its pore structure stores nutrition, moisture and oxygen and provides the growing space for plant root growth, for root system of plant provides oxygen, also suction and the water storage for water-absorbing resin provides certain space.The material of this urea and formaldehyde reaction self physicochemical property is suitable for most of plant growths, and compound nutritional can be provided.The high hydroscopic resin particle that the present invention adopts is a kind of functional high molecule material that has a large amount of hydrophilic radicals, and pressurization also was difficult to moisture from coming out after imbibition became hydrogel.Its water retention can reduce irrigation water to be used.
Urea aldehyde of the present invention-acrylic acid composite cultivation substrate have production process simple, easy to use, be easy to advantages such as transportation and have advantages such as nontoxic, pollution-free, environmental protection.The structure of the interior distribution acrylic resin silk of UF foamed plastics has higher intensity and fixing body is beneficial to the fixing of root system of plant, the high hydroscopic resin particle that distributes on the hole that foaming forms and the pore wall makes this matrix have effects such as ventilation, water holding, storage nutrition.
As seen, urea aldehyde of the present invention-acrylic acid composite cultivation substrate has the following advantages:
1, is convenient to production and processing and use, is easy to transportation.
2, has the intensity of carrying out the vertical cultivation moulding.
3, the component physicochemical property meets most of plant growth requirement in the matrix.
4, have powerful water conservation, fertile, the oxygen storage capacity of guarantor.
5, have cleaning, environmental protection, free of contamination effect.
6, reduce the use of other matrix, save earth resource, reduce the use of non-renewable resources.
Description of drawings
Fig. 1 is structural representation of the present invention.
Reference numeral: 1-UF foamed plastics, 2-acrylic resin silk, 3-high hydroscopic resin particle.
Embodiment
In order to make technical problem solved by the invention, technical scheme and beneficial effect clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explaining the present invention, and be not used in restriction the present invention.
A kind of urea aldehyde-acrylic acid composite cultivation substrate as shown in Figure 1, comprise UF foamed plastics (1), acrylic resin silk (2) and high hydroscopic resin particle (3), it is characterized in that: described UF foamed plastics (1) is urea-formaldehyde resin solution is added expanding foam solution and to be blown into air and to foam, in the acrylic resin silk (2) of injection moulding, make it the stable foamed plastics solid that acrylic resin silk (2) is rich in inside that becomes through physics or chemical change again.Described acrylic resin silk (2) is by the silk flocculent structure that is wound in after the wire drawing of acrylic resin hot melt.UF foamed plastics (1) inside exists a large amount of gas micropores to be pore structure and is distributed with high hydroscopic resin particle (3), and high hydroscopic resin particle (3) is fixed on UF foamed plastics (1) pore wall.
Described UF foamed plastics is to be obtained urea-formaldehyde resin solution and mix stirring foaming and curing with expanding foam solution forming by urea and formaldehyde condensation polymer reaction, and the density of described UF foamed plastics is 0.010-0.020g/cm
3
Described acrylic resin silk is synthetic by acrylate and methacrylate monomer copolymerization, and the consumption of described acrylic resin silk is every cubic metre of 3kg-5kg.
Described high hydroscopic resin particle (3) is starch grafted acrylate crosslinking copolymerization composition granule, acrylamide and acrylic acid salt crosslinking copolymerization composition granule or the mixture of the two.The consumption of high hydroscopic resin particle (3) can be every cubic metre of 2～3kg.The particle diameter of high hydroscopic resin particle (3) can be 200～800 orders.
The preparation method of this urea aldehyde-acrylic acid composite cultivation substrate, step is as follows:
Step 1 is drawn wire the after-blow of acrylic resin hot melt, and is wound in the flocculent structure in space;
Step 2 obtains urea-formaldehyde resin solution by urea and formaldehyde condensation polymer reaction;
Step 3, the preparation expanding foam solution;
Step 4 stirs described expanding foam solution and produces and add described urea-formaldehyde resin solution behind a large amount of foams and continue to stir, and sprays into the high hydroscopic resin particle in the volume of material expansion process, and lasting stirring is foamed into the foam thing;
Step 5, put in type acrylic resin silk in the mold in advance, then described foam thing is clamp-oned mold and obtain mixture, mixture solidifies in described mold, be fixed on the high hydroscopic resin particle on the foam pore wall simultaneously or be scattered in the space of gas micropore, form urea aldehyde-acrylic acid composite cultivation substrate raw material.
Before using this urea aldehyde-acrylic acid cultivation matrix size and shape as required cut moulding and reserved the seed hole, it is fertile to absorb water then, and plant seed or brood body are embedded in this foam solid.
More than by the detailed description of concrete and preferred embodiment the present invention; but those skilled in the art should be understood that; the present invention is not limited to the above embodiment; within the spirit and principles in the present invention all; any modification of doing, be equal to replacement etc., all should be included within protection scope of the present invention.
Claims (8)
1. urea aldehyde-acrylic acid composite cultivation substrate, it is characterized in that: comprise resin silk, water-absorption particle and solid matrix, described resin silk is entrained in described solid matrix inside, and described solid matrix is inner and the surface all is dispersed with a large amount of gas micropores, and described water-absorption particle is fixed on the hole wall of described gas micropore or is scattered in the space of gas micropore; Described water-absorption particle is the high hydroscopic resin particle, and described resin silk is the acrylic resin silk, and described solid matrix is UF foamed plastics.
2. urea aldehyde according to claim 1-acrylic acid composite cultivation substrate, it is characterized in that: described UF foamed plastics is to be obtained urea-formaldehyde resin solution and mix stirring foaming and curing with expanding foam solution forming by urea and formaldehyde condensation polymer reaction, and the density of described UF foamed plastics is 0.010-0.020g/cm
3
3. urea aldehyde according to claim 1-acrylic acid composite cultivation substrate is characterized in that: described acrylic resin silk is synthetic by acrylate and methacrylate monomer copolymerization, and the consumption of described acrylic resin silk is every cubic metre of 3kg-5kg.
4. urea aldehyde according to claim 1-acrylic acid composite cultivation substrate, it is characterized in that: described high hydroscopic resin particle is starch grafted acrylate crosslinking copolymerization composition granule, perhaps acrylamide and acrylic acid salt crosslinking copolymerization composition granule, the perhaps mixture of the two.
5. urea aldehyde according to claim 4-acrylic acid composite cultivation substrate, it is characterized in that: the consumption of described high hydroscopic resin particle is every cubic metre of 2-3kg, described high hydroscopic resin particle grain size is the 200-800 order.
6. urea aldehyde according to claim 1-acrylic acid composite cultivation substrate, it is characterized in that: described gas micropore is pore structure, and described high hydroscopic resin particle is fixed on the pore wall of described gas micropore.
7. the preparation method of urea aldehyde-acrylic acid composite cultivation substrate is characterized in that, the bag step is as follows:
Step 1 is drawn wire the after-blow of acrylic resin hot melt, and is wound in the flocculent structure in space;
Step 2 obtains urea-formaldehyde resin solution by urea and formaldehyde condensation polymer reaction;
Step 3, the preparation expanding foam solution;
Step 4 stirs described expanding foam solution and produces and add described urea-formaldehyde resin solution behind a large amount of foams and continue to stir, and sprays into the high hydroscopic resin particle in the volume of material expansion process, and lasting stirring is foamed into the foam thing;
Step 5, put in type acrylic resin silk in the mold in advance, then described foam thing is clamp-oned mold and obtain mixture, mixture solidifies in described mold, be fixed on the high hydroscopic resin particle on the foam pore wall simultaneously or be scattered in the space of gas micropore, form urea aldehyde-acrylic acid composite cultivation substrate raw material.
8. the preparation method of urea aldehyde according to claim 7-acrylic acid composite cultivation substrate is characterized in that, also comprises step 6, and described urea aldehyde-acrylic acid composite cultivation substrate raw material size and shape as required cut moulding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101856513A CN102726275B (en) | 2012-06-07 | 2012-06-07 | Urea formaldehyde-acrylic acid compound culture substrate and method for preparing same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101856513A CN102726275B (en) | 2012-06-07 | 2012-06-07 | Urea formaldehyde-acrylic acid compound culture substrate and method for preparing same |
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| Publication Number | Publication Date |
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| CN102726275A CN102726275A (en) | 2012-10-17 |
| CN102726275B true CN102726275B (en) | 2013-10-02 |
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| CN2012101856513A Expired - Fee Related CN102726275B (en) | 2012-06-07 | 2012-06-07 | Urea formaldehyde-acrylic acid compound culture substrate and method for preparing same |
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| CN105152744A (en) * | 2015-07-30 | 2015-12-16 | 合肥元政农林生态科技有限公司 | Seedling growing matrix improving pteridium aquilinum spore seedling rate |
| CN105036955A (en) * | 2015-08-04 | 2015-11-11 | 深圳风会云合生态环境有限公司 | Plant cultivation substrate |
| CN105830801A (en) * | 2016-04-26 | 2016-08-10 | 山东商道生物科技有限公司 | Mixed resin cultivating and seedling-raising medium |
| EP3945782A1 (en) * | 2019-03-28 | 2022-02-09 | W.L. Gore & Associates, Inc. | Growth medium with polymer |
| CN110122268A (en) * | 2019-06-04 | 2019-08-16 | 中国科学院生态环境研究中心 | A kind of method that waste plastic prepares water-retention plant cultivation matrix |
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| CN1229013C (en) * | 2003-04-03 | 2005-11-30 | 顾岩 | Manufacture method for plant plantation substrate and plantation substrate thereby |
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