CN112142540A - Slow-release plant nutrition auxiliary agent and preparation method thereof - Google Patents
Slow-release plant nutrition auxiliary agent and preparation method thereof Download PDFInfo
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- CN112142540A CN112142540A CN202011039959.8A CN202011039959A CN112142540A CN 112142540 A CN112142540 A CN 112142540A CN 202011039959 A CN202011039959 A CN 202011039959A CN 112142540 A CN112142540 A CN 112142540A
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- slow
- auxiliary agent
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05C—NITROGENOUS FERTILISERS
- C05C9/00—Fertilisers containing urea or urea compounds
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05C—NITROGENOUS FERTILISERS
- C05C9/00—Fertilisers containing urea or urea compounds
- C05C9/005—Post-treatment
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
- C05G3/40—Mixtures of one or more fertilisers with additives not having a specially fertilising activity for affecting fertiliser dosage or release rate; for affecting solubility
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G5/00—Fertilisers characterised by their form
- C05G5/30—Layered or coated, e.g. dust-preventing coatings
- C05G5/37—Layered or coated, e.g. dust-preventing coatings layered or coated with a polymer
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Pest Control & Pesticides (AREA)
- Fertilizers (AREA)
Abstract
The invention relates to a slow-release plant nutrition auxiliary agent and a preparation method thereof, wherein the slow-release plant nutrition auxiliary agent consists of 45-88.9% of medium trace element-containing substances, 1-10% of fillers, 0.1-5% of adhesives and 10-40% of plant oil; the preparation method comprises the following steps: firstly, dissolving an adhesive in a solvent, and then adding a certain mass of vegetable oil to obtain a vegetable oil emulsion; and mixing the plant oil emulsion obtained in the previous step, medium and trace element-containing substances and fillers, and uniformly stirring to obtain the slow-release plant nutrition aid. The production process is simple, and the prepared slow-release plant nutrient auxiliary agent has high and complete nutrient content of various nutrient components and meets the requirements of crops on medium and trace elements. Meanwhile, the ecological friendly component substances are used for improving the performance of the granular fertilizer, the component has the flexibility of an organic adhesive film, the release rate of ammonium ions in urea can be reduced by inhibiting urease existing in soil, and the influence of ammonia on the environment can be reduced by reducing the pH value of local soil and increasing the content of organic matters in the soil.
Description
Technical Field
The invention relates to slow release of a coated granular fertilizer, in particular to a slow release plant nutrition auxiliary agent and a preparation method thereof, which are particularly applied to the field of fertilizers.
Background
At present, China is the world with the largest production and use of fertilizers, researches show that the nutrient utilization rate of fertilizer farmlands in China is generally low at the present stage, particularly the nitrogen fertilizer utilization rate is only about 30%, and in order to improve the nutrient utilization rate of nitrogen fertilizers, particularly urea, the industry is actively researching slow release urea.
All plants require a balanced micronutrient supply to grow. Therefore, farmers need to balance the nutritional fertilizers at the lowest cost. The type of nutrient content in the balanced fertilizer depends on the plant type, soil type and weather. Since soil, climate and agricultural systems vary from region to region, it is desirable to produce a balanced fertilizer product near its end use. Other methods for coating the granules include the use of a binder to attach the nutrients to the fertilizer granules.
Patent US3353949 discloses a process for preparing coated granular fertilizers wherein finely divided nutrient particles are mixed with a granular fertilizer and an aqueous solution of a conditioning agent is added and mixed until adherence of the nutrient to the fertilizer is achieved, which has the problem that with the conditioning agent usually being formulated in a 30% to 70% aqueous solution, the subsequent coating of the granules requires drying and the moisture control of the granular fertilizer is difficult. In patent US3938469, a falling curtain of granulated fertilizer is sprayed with a binder and then mixed with finely divided nutrient granules, which solution has problems such as the use of a 30-70% aqueous solution of ammonium nitrate in the binder solution and the need for drying of the subsequent granules. Patent CN1557791 describes a preparation method of a coated controlled-release compound fertilizer, which comprises the preparation of a coating liquid and the coating of compound fertilizer particles, PVA is used as a degradable polymer soil modifier, natural starch and a fertilizer efficiency extender are used as main components to form the coated controlled-release compound fertilizer, the technical scheme has the problem that the required controlled-release effect is difficult to achieve because the PVA selected by the technical scheme has the molecular weight of 1300 plus 1800 which is easy to absorb water and swell, and the slow-release effect is poor. Patent WO9206056 describes a process for producing coated fertilizer granules in which a water-soluble binder and an additive are added sequentially to fertilizer granules to form a multi-layer binder and additive, which has the problem that the granular fertilizer may be prone to the problem of shedding with the water-soluble binder. The application IN300105B discloses a coating composition for delivery of micronutrients and slow hydrolysis of urea, where the presence of large amounts of water during the coating process, which need to be further removed, affects the properties of the urea itself and thus the slow release effect.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a slow-release plant nutrition auxiliary agent and a preparation method thereof. The production process is simple, the prepared slow-release plant nutrition auxiliary agent has complete nutrient content of various nutrient components, meets medium and trace elements required by crop pairs, and simultaneously improves the performance of the granular fertilizer by using the eco-friendly component substances, so that the flexibility of an organic adhesive film is increased, the release rate of ammonium ions in urea is reduced by inhibiting urease existing in soil, and the influence of ammonia on the environment is reduced by reducing the pH value of local soil and increasing the organic matter content of the soil.
The technical scheme adopted by the invention is as follows:
the slow-release plant nutrition auxiliary agent is characterized by comprising the following components in percentage by weight: is prepared from medium-trace element substance (45-88.9%), filler (1-10%), adhesive (0.1-5%) and plant oil (10-40%) through dissolving the adhesive in solvent and preparing solution.
The medium trace element-containing substance is one or a mixture of more than two of molybdenum oxide, copper oxide, cuprous oxide, zinc oxide, sodium borate, ferric oxide, manganese oxide, cobalt chloride, magnesium hydroxide, calcium hydroxide and ferric sulfide.
The filler is one or a mixture of more than two of white carbon black, magnesium aluminum silicate, attapulgite and organic modified bentonite.
The adhesive is one or a mixture of more than two of ethyl cellulose, modified chitosan and polylactic acid.
The vegetable oil is one or more of wheat germ oil, sunflower seed oil, linseed oil, palm kernel stearin, grape seed oil, sesame oil and soybean oil.
The solvent is one or a mixture of more than two of ethanol, acetone, polyethylene glycol and ethylene glycol.
A preparation method of a slow-release plant nutrition auxiliary agent is characterized by comprising the following steps:
firstly, dissolving a certain mass of adhesive in a solvent, and adding a certain mass of vegetable oil under stirring to obtain a vegetable oil emulsion;
secondly, mixing the plant oil emulsion obtained in the step I, the fine powder containing medium and trace element substances and the filler, and uniformly stirring to obtain the slow-release plant nutrition auxiliary agent.
The size range of the fine powder of the medium and trace element-containing substance is 10-500 mu m.
The slow-release plant nutrition auxiliary agent has the following advantages:
1. the invention utilizes eco-friendly resin components (ethyl cellulose, modified chitosan and polylactic acid) as the adhesive to improve the utilization rate of fertilizers such as urea and the like. Because the organic solvent is easy to volatilize, the coating resin adhesive is easy to form nano-scale gaps and has good flexibility, and the slow release of nutrients in the granular fertilizer can be effectively controlled. Particularly for granular urea, the added organic binder reduces the release rate of ammonium ions in the urea by inhibiting urease existing in soil, and simultaneously can reduce the influence of ammonia on the environment by reducing the pH value of local soil and increasing the organic matter content of the soil;
2. the medium and trace element substances are effectively dispersed on the surface of the granular fertilizer, the medium and trace element substances can be well fixed on the surface of the fertilizer granules due to the utilization of the eco-friendly resin, and meanwhile, the grain diameter of the medium and trace element substances can be rapidly absorbed by the root system of crops through scientific design. Compared with the traditional powder adding mode, the uniformity is poor, the environmental pollution is easy to cause, and the using amount of the powder is not suitable to be controlled. The preparation process flow is shortened by a one-step adding mode, so that the preparation method of the slow-release plant nutrition auxiliary agent obtained by the invention has the advantages of short flow, simplicity, convenience and easiness in operation, and meanwhile, the energy consumption and the production cost are reduced;
3. the slow-release plant nutrition auxiliary agent prepared by the invention not only improves the utilization rate of the granulated fertilizer and achieves good slow-release effect, but also the granulated fertilizer treated by the slow-release plant nutrition auxiliary agent can provide more nutrition for crops, and further increases the additional value of the fertilizer.
Detailed Description
The present invention will be described in further detail with reference to specific examples. The raw materials of the embodiments of the invention are all purchased directly.
Example 1
Dissolving 10g of modified ethyl cellulose in 100g of ethanol to prepare a solution, and then adding 15g of ethanol solution of the modified ethyl cellulose to 30g of linseed oil to obtain a vegetable oil emulsion; then, 45g of zinc oxide, 5g of sodium borate and 5g of white carbon black are sequentially added, and the slow-release plant nutrition auxiliary agent is prepared under mechanical stirring. The slow-release plant nutrition auxiliary agent is used for coating urea, 5kg of slow-release plant nutrition auxiliary agent is used for coating each ton of urea, and the slow-release effect reaches 30 days.
Example 2
Dissolving 10g of modified ethyl cellulose in 100g of ethanol to prepare a solution, and then adding 15g of ethanol solution of the modified ethyl cellulose to 30g of linseed oil to obtain a vegetable oil emulsion; then, 45g of zinc oxide, 5g of sodium borate and 5g of white carbon black are sequentially added, and the slow-release plant nutrition auxiliary agent is prepared under mechanical stirring. The slow-release plant nutrition auxiliary agent is used for coating urea, 10kg of slow-release plant nutrition auxiliary agent is used for coating each ton of urea, and the slow-release effect reaches 40 days.
Example 3
Dissolving 10g of modified ethyl cellulose in 100g of ethanol to prepare a solution, and then adding 25g of ethanol solution of the modified ethyl cellulose to 30g of linseed oil to obtain a vegetable oil emulsion; then, 35g of zinc oxide, 5g of sodium borate and 5g of white carbon black are added in sequence, and the slow-release plant nutrition auxiliary agent is prepared under mechanical stirring. The slow-release plant nutrition auxiliary agent is used for coating urea, 10kg of slow-release plant nutrition auxiliary agent is used for coating each ton of urea, and the slow-release effect reaches 40 days.
Example 4
Dissolving 10g of ethyl cellulose in 100g of ethanol to prepare a solution, and then adding 25g of ethanol solution of ethyl cellulose to 24g of linseed oil to obtain a vegetable oil emulsion; then, 45g of zinc oxide, 5g of sodium borate and 1g of white carbon black are sequentially added, and the slow-release plant nutrition auxiliary agent is prepared under mechanical stirring. The slow-release plant nutrition auxiliary agent is used for coating urea, 10kg of slow-release plant nutrition auxiliary agent is used for coating each ton of urea, and the slow-release effect reaches 45 days.
Example 5
Dissolving 10g of modified ethyl cellulose in 100g of ethanol to prepare a solution, and then adding 20g of ethanol solution of the modified ethyl cellulose to 25g of linseed oil to obtain a vegetable oil emulsion; then, 40g of zinc oxide, 5g of sodium borate and 10g of white carbon black are added in sequence, and the slow-release plant nutrition auxiliary agent is prepared under mechanical stirring. The slow-release plant nutrition auxiliary agent is used for coating urea, 10kg of slow-release plant nutrition auxiliary agent is used for coating each ton of urea, and the slow-release effect reaches 50 days.
Example 6
Dissolving 10g of polylactic acid in 100g of acetone to prepare a solution, and then adding 20g of the acetone solution of the polylactic acid to 30g of linseed oil to obtain a vegetable oil emulsion; then, 40g of zinc oxide, 5g of sodium borate and 5g of white carbon black are added in sequence, and the slow-release plant nutrition auxiliary agent is prepared under mechanical stirring. The slow-release plant nutrition auxiliary agent is used for coating urea, 20kg of the slow-release plant nutrition auxiliary agent is used for coating each ton of urea, and the slow-release effect reaches 50 days.
Example 7
Dissolving 10g of modified chitosan in 100g of ethanol to prepare a solution, and then adding 25g of ethanol solution of the modified chitosan to 22g of linseed oil to obtain a vegetable oil emulsion; then, 40g of zinc oxide, 5g of sodium borate and 8g of white carbon black are added in sequence, and the slow-release plant nutrition auxiliary agent is prepared under mechanical stirring. The slow-release plant nutrition auxiliary agent is used for coating urea, 10kg of slow-release plant nutrition auxiliary agent is used for coating each ton of urea, and the slow-release effect reaches 50 days.
Example 8
Dissolving 10g of modified chitosan in 100g of ethanol to prepare a solution, and then adding 35g of ethanol solution of the modified chitosan to 10g of linseed oil to obtain a vegetable oil emulsion; then, 40g of zinc oxide, 5g of sodium borate and 10g of magnesium aluminum silicate are added in sequence, and the slow-release plant nutrition auxiliary agent is prepared under the mechanical stirring. The slow-release plant nutrition auxiliary agent is used for coating urea, 15kg of slow-release plant nutrition auxiliary agent is used for coating each ton of urea, and the slow-release effect reaches 90 days.
Example 9
Dissolving 10g of polylactic acid in 90g of glycol to prepare a solution, and then adding 50g of glycol solution of polylactic acid to 4g of linseed oil to obtain a vegetable oil emulsion; then 40g of molybdenum oxide, 5g of sodium borate and 1g of attapulgite are added in sequence, and the slow-release plant nutrition auxiliary agent is prepared under the mechanical stirring. The slow-release plant nutrition auxiliary agent is used for coating urea, 20kg of the slow-release plant nutrition auxiliary agent is used for coating each ton of urea, and the slow-release effect reaches 90 days.
Example 10
Dissolving 10g of modified chitosan in 90g of polyethylene glycol to prepare a solution, and then adding 1g of the polyethylene glycol solution of the modified chitosan to 40g of linseed oil to obtain a vegetable oil emulsion; then adding 49g of manganese oxide, 5g of sodium borate and 5g of organic modified bentonite in sequence, and mechanically stirring to obtain the slow-release plant nutrition auxiliary agent. The slow-release plant nutrition auxiliary agent is used for coating urea, 10kg of slow-release plant nutrition auxiliary agent is used for coating each ton of urea, and the slow-release effect reaches 50 days.
Example 11
Dissolving 10g of modified chitosan in 90g of ethanol to prepare a solution, and then adding 1g of ethanol solution of the modified chitosan to 10g of linseed oil to obtain a vegetable oil emulsion; then, 83g of zinc oxide, 5g of sodium borate and 1g of magnesium aluminum silicate are added in sequence, and the slow-release plant nutrition auxiliary agent is prepared under the mechanical stirring. The slow-release plant nutrition auxiliary agent is used for coating urea, 15kg of slow-release plant nutrition auxiliary agent is used for coating each ton of urea, and the slow-release effect reaches 90 days.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the protection scope of the present invention, and although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (8)
1. The slow-release plant nutrition auxiliary agent is characterized by comprising the following components in percentage by weight: is prepared from medium-trace element substance (45-88.9%), filler (1-10%), adhesive (0.1-5%) and plant oil (10-40%) through dissolving the adhesive in solvent and preparing solution.
2. The slow release plant nutrient aid of claim 1, wherein: the medium trace element-containing substance is one or a mixture of more than two of molybdenum oxide, copper oxide, cuprous oxide, zinc oxide, sodium borate, ferric oxide, manganese oxide, cobalt chloride, magnesium hydroxide, calcium hydroxide and ferric sulfide.
3. The slow release plant nutrient aid of claim 1, wherein: the filler is one or a mixture of more than two of white carbon black, magnesium aluminum silicate, attapulgite and organic modified bentonite.
4. The slow release plant nutrient aid of claim 1, wherein: the adhesive is one or a mixture of more than two of ethyl cellulose, modified chitosan and polylactic acid.
5. The slow release plant nutrient aid of claim 1, wherein: the vegetable oil is one or more of wheat germ oil, sunflower seed oil, linseed oil, palm kernel stearin, grape seed oil, sesame oil, soybean oil, linseed oil, castor oil and rapeseed oil.
6. The slow release plant nutrient aid of claim 1, wherein: the solvent is one or a mixture of more than two of ethanol, acetone, polyethylene glycol and ethylene glycol.
7. A process for the preparation of a slow release plant nutrient supplement as claimed in any one of claims 1 to 6, comprising the steps of:
firstly, dissolving a certain mass of adhesive in a solvent, and adding a certain mass of vegetable oil under stirring to obtain a vegetable oil emulsion;
secondly, mixing the plant oil emulsion obtained in the step I, the fine powder containing medium and trace element substances and the filler, and uniformly stirring to obtain the slow-release plant nutrition auxiliary agent.
8. The method for preparing a slow-release plant nutritional aid according to claim 6, wherein the method comprises the following steps: the size range of the fine powder of the medium and trace element-containing substance is 10-500 mu m.
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| CN202011039959.8A CN112142540A (en) | 2020-09-28 | 2020-09-28 | Slow-release plant nutrition auxiliary agent and preparation method thereof |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104177204A (en) * | 2014-08-12 | 2014-12-03 | 淮南市益农瓜果产销服务有限公司 | Long-effect slow release strawberry fertilizer and preparation method thereof |
| CN104355845A (en) * | 2014-11-11 | 2015-02-18 | 合肥不老传奇保健科技有限公司 | Coated fertilizer for pre-blossoming strawberries and preparation method thereof |
-
2020
- 2020-09-28 CN CN202011039959.8A patent/CN112142540A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104177204A (en) * | 2014-08-12 | 2014-12-03 | 淮南市益农瓜果产销服务有限公司 | Long-effect slow release strawberry fertilizer and preparation method thereof |
| CN104355845A (en) * | 2014-11-11 | 2015-02-18 | 合肥不老传奇保健科技有限公司 | Coated fertilizer for pre-blossoming strawberries and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 叶堂林编著: "《农业循环经济：模式与途径》", 30 April 2016, 长春：吉林出版集团有限责任公司 * |
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Application publication date: 20201229 |
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