CN114057522B - Biological stimulin type liquid fertilizer containing double-effect slow-release nitrogen and preparation method thereof - Google Patents
Biological stimulin type liquid fertilizer containing double-effect slow-release nitrogen and preparation method thereof Download PDFInfo
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- CN114057522B CN114057522B CN202111363826.0A CN202111363826A CN114057522B CN 114057522 B CN114057522 B CN 114057522B CN 202111363826 A CN202111363826 A CN 202111363826A CN 114057522 B CN114057522 B CN 114057522B
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05C—NITROGENOUS FERTILISERS
- C05C3/00—Fertilisers containing other salts of ammonia or ammonia itself, e.g. gas liquor
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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
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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
- C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
- C05G3/90—Mixtures of one or more fertilisers with additives not having a specially fertilising activity for affecting the nitrification of ammonium compounds or urea in the soil
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
- Y02P60/20—Reduction of greenhouse gas [GHG] emissions in agriculture, e.g. CO2
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Abstract
The invention discloses a biological stimulator composition containing double-effect slow-release nitrogen and a preparation method thereof. The biological stimulator composition containing double-effect slow-release nitrogen comprises: 600 parts of nitrogen source, 100-300 parts of polymeric aldehyde substance, 50-150 parts of ammonia water, 5-20 parts of alkaline compound, 50-350 parts of thiosulfate, 0.1-100 parts of biostimulant, 0.1-50 parts of medium trace element-containing substance and 0.5-20 parts of auxiliary agent. The biological stimulant composition containing the double-effect slow-release nitrogen adopts a form of combining urea formaldehyde slow-release nitrogen and thiosulfate nitrogen, plays a role of double-effect nitrogen slow release, has the longest duration of 120 days, and solves the problems of large nitrogen source dosage, short lasting time and high loss rate.
Description
Technical Field
The invention relates to the field of fertilizers, in particular to a biostimulant composition containing double-effect slow-release nitrogen and a preparation method thereof.
Background
The nitrogen fertilizer is a fertilizer variety with the largest demand in agricultural production, and common ammonium nitrogen fertilizer, nitrate nitrogen fertilizer and amide nitrogen fertilizer are available. After different chemical nitrogen fertilizers are applied to the soil, respectively using NH 4 + 、NO 3 - Or the urea molecules exist in the soil in a form ready for the absorption and utilization of plants. However, nitrogen is relatively active, and after being applied to soil, part of nitrogen is volatilized by ammonia and nitreLoss of nitrogen leaching, denitrification and the like. Therefore, the conditions of excessive nitrogen fertilizer consumption and low utilization rate generally exist in agricultural production.
The urea-formaldehyde slow-release liquid fertilizer is obtained based on the reaction between urea, formaldehyde and ammonia. Such urea-formaldehyde fertilizers are prepared to provide a more controlled release of the nitrogen source, thereby allowing the release of nitrogen from the fertilizer to more closely match the nitrogen demand of the plant growth, and to reduce the nitrogen loss associated with the rapid release of the nitrogen source (e.g., urea, UAN solution). Patent WO0216458A2 discloses a controlled release urea formaldehyde liquid resin which is useful as a fertilizer, contains at least 50% controlled release nitrogen, and provides stable phosphate, potassium salts. The technical scheme has the problems that the influence factor caused by process fluctuation is large, and the solution stability is only 2 months. Patent US6306194 discloses a controlled release liquid urea formaldehyde fertilizer with a nitrogen content of at least 31% and a process for its manufacture. The technical scheme has the problem of higher nitrogen concentration, but the slow release effect is poorer.
Aiming at the prior art, when the liquid slow-release nitrogen fertilizer pursues high solid content to maximize the total nitrogen value, the liquid nitrogen fertilizer has the problems of stability, poor slow-release effect and toxic hazard to plants caused by rapid nitrogen release in the early stage. Thus, the existing slow-release nitrogen fertilizers still need to be improved.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, the invention aims to provide a biostimulant composition containing double-effect slow-release nitrogen and a preparation method thereof. The biological stimulant composition containing the double-effect slow-release nitrogen adopts a form of combining urea formaldehyde slow-release nitrogen and thiosulfate nitrogen, plays a role of double-effect nitrogen slow release, has the longest duration of 120 days, and solves the problems of large nitrogen source dosage, short lasting time and high loss rate. The slow-release nitrogen fertilizer is directly sprayed on the leaf surfaces of plants, has higher nutrient absorption rate, can continuously provide nutrients for crops for a long time, and effectively improves the nitrogen element absorption rate. Meanwhile, the slow-release nitrogen fertilizer simultaneously solves the problem that the traditional urea formaldehyde slow-release nitrogen fertilizer has poor stability under high solid content and higher nitrogen concentration. In addition, the biostimulant composition containing double-effect slow-release nitrogen also has higher storage stability, the storage time at normal temperature is more than 48 months, and the salting-out temperature is lower than-20 ℃.
In one aspect of the present invention, a biostimulant composition containing dual effect sustained release nitrogen is provided. According to an embodiment of the present invention, the biostimulant composition containing dual effect sustained release nitrogen comprises: 600 parts of nitrogen source, 100-300 parts of polymeric aldehyde substance, 50-150 parts of ammonia water, 5-20 parts of alkaline compound, 50-350 parts of thiosulfate, 0.1-100 parts of biostimulant, 0.1-50 parts of medium trace element-containing substance and 0.5-20 parts of auxiliary agent.
In the biological stimulator composition containing double-effect slow-release nitrogen, the polymerization degree of the urea-formaldehyde clear liquid obtained by adopting polymeric aldehydes as raw materials is high, and the biological stimulator composition has a better slow-release effect. Meanwhile, the nitrogen source exists in a unique thiosulfate form, thiosulfate has obvious inhibition effect on the nitrification of ammonia and the conversion process of the ammonia into effective nitrate, and simultaneously can inhibit the activity of urease and reduce the hydrolysis of the nitrogen source and NH 4 + Oxidizing to play a role of nitrogen double-effect slow release, and the duration can reach 120 days at most. The biological stimulin composition containing double-effect slow-release nitrogen contains medium and trace element substances and biological stimulin, can play a role in high-efficiency biological nitrogen activation, can activate the activity of a key enzyme glutamine synthetase in the nitrogen circulation process of plants, promotes root growth and chlorophyll synthesis, and improves the quality and yield of crops. In addition, the biological stimulin composition containing double-effect slow-release nitrogen can be suitable for various application modes, such as flushing application and foliage spraying. The safety of foliage spraying is high, the fertilizer-water ratio is 1, the unmanned aerial vehicle is free from fertilizer damage, and the utilization rate of foliage spraying nitrogen is improved to more than 90%; the biological stimulator composition containing the double-effect slow-release nitrogen has better mixing compatibility with pesticides, can be used together with field crops in a one-spraying three-proofing period, and solves the problems of large dosage, short duration, high loss rate and environmental pollution of the traditional nitrogen source; the slow release nitrogen fertilizer is used for high-concentration unmanned aerial vehicle flying application, and can solve the problem of uneven spreading of the traditional solid fertilizer, greatly save labor costThe method is as follows.
In addition, the biostimulant composition containing double-effect slow-release nitrogen according to the above embodiment of the invention may also have the following additional technical features:
in some embodiments of the invention, the nitrogen source is urea.
In some embodiments of the invention, the polymeric aldehyde is paraformaldehyde.
In some embodiments of the invention, the ammonia content of the aqueous ammonia is 20% to 28%.
In some embodiments of the invention, the basic compound is selected from at least one of sodium hydroxide, sodium carbonate, sodium bicarbonate, potassium hydroxide, potassium carbonate, potassium bicarbonate.
In some embodiments of the invention, the thiosulfate salt is selected from at least one of potassium thiosulfate, ammonium thiosulfate, sodium thiosulfate.
In some embodiments of the present invention, the biostimulant is selected from at least one of seaweed extract, mineral humic acid, mineral potassium fulvate, biochemical potassium fulvate, bacterial metabolites, oligopeptides, free amino acids.
In some embodiments of the invention, the medium trace element-containing substance is at least one selected from the group consisting of zinc ethylenediaminetetraacetate, copper ethylenediaminetetraacetate, manganese ethylenediaminetetraacetate, boric acid, sodium octaborate tetrahydrate, sodium molybdate, ammonium molybdate, and magnesium sulfate.
In some embodiments of the present invention, the auxiliary is selected from at least one of an aldehyde-based polymerization inhibitor, a penetrant, an adhesive, a tank mix auxiliary, and a flight control auxiliary.
In another aspect of the present invention, the present invention provides a method for preparing the biostimulant composition containing dual effect sustained release nitrogen of the above embodiments. According to an embodiment of the invention, the method comprises: (1) Mixing urea and ammonia water, adding polymeric aldehyde substances into the obtained mixed material, and then reacting to obtain a first mixed material; (2) And adjusting the pH value of the first mixed material to 8-11, and then adding thiosulfate, biological stimulin, medium-trace element-containing substances and an auxiliary agent into the first mixed material to obtain the double-effect slow-release nitrogen-containing biological stimulin composition. Therefore, the method can simply and efficiently prepare the biostimulant composition containing the double-effect slow-release nitrogen, and is suitable for large-scale production.
In addition, the method for preparing the biostimulant composition containing double-effect slow-release nitrogen according to the above embodiment of the invention may further have the following additional technical features:
in some embodiments of the present invention, a formaldehyde inhibitor is added to the first mixture after step (1).
In some embodiments of the invention, the reaction is carried out at 70 to 120 ℃ for 0.5 to 6 hours.
In some embodiments of the invention, after the reaction is completed, the temperature of the first mixture is reduced to 40-60 ℃.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Detailed Description
The following describes embodiments of the present invention in detail. The following examples are illustrative only and are not to be construed as limiting the invention. The examples, where specific techniques or conditions are not indicated, are to be construed according to the techniques or conditions described in the literature in the art or according to the product specifications. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products commercially available.
In one aspect of the invention, the invention provides a biostimulant composition containing double-effect slow-release nitrogen. According to an embodiment of the present invention, the biostimulant composition containing dual effect sustained release nitrogen comprises: 600 parts of nitrogen source, 100-300 parts of polymeric aldehyde substance, 50-150 parts of ammonia water, 5-20 parts of alkaline compound, 50-350 parts of thiosulfate, 0.1-100 parts of biostimulant, 0.1-50 parts of medium trace element-containing substance and 0.5-20 parts of auxiliary agent. Wherein, the nitrogen source can be urea.
In the biological stimulator composition containing double-effect slow-release nitrogen, the content of polymeric aldehyde substances is 100-300 parts by weight, and the specific parts by weight can be 100, 125, 150, 175, 200, 225, 250, 275, 300 and the like. Compared with the traditional liquid formaldehyde, the polymerization degree of the urea formaldehyde obtained by the reaction of the polymeric aldehyde substance and the nitrogen source is higher, and the slow release effect is better. According to some embodiments of the invention, the polymeric aldehyde is paraformaldehyde. If the content of the polymeric aldehyde substances is too high, the product state can be influenced, and precipitates appear; if the content of polymeric aldehydes is too low, the content of urea formaldehyde which may be formed decreases, and the product state may be affected and precipitation may occur.
In the biological stimulator composition containing double-effect slow-release nitrogen, the content of ammonia water is 50-150 parts by weight, and the specific parts by weight can be 50, 75, 100, 125, 150 and the like. Specifically, the ammonia content of the ammonia water is 20-28%.
In the double-effect slow-release nitrogen-containing biological stimulator composition, the content of the alkaline compound is 5-20 parts by weight, and the specific parts by weight can be 5, 7.5, 10, 12.5, 15, 17.5, 20 and the like. According to some embodiments of the present invention, the above basic compound may be at least one selected from the group consisting of sodium hydroxide, sodium carbonate, sodium bicarbonate, potassium hydroxide, potassium carbonate, and potassium bicarbonate. If the content of the alkaline compound is too high, the pH value of the product possibly exceeds the specified range of the fertilizer execution standard (the product executes the NY1106-2010 standard); if the content of the basic compound is too low, more hydrogen ions are present in the system, which may result in curing of the product.
In the double-effect slow-release nitrogen-containing biological stimulator composition, the content of the thiosulfate is 50 to 350 parts by weight, and the specific parts by weight can be 50, 100, 150, 200, 250, 300, 350 and the like. Thiosulfate can react with a nitrogen source to obtain thiosulfate nitrogen, and the duration of the fertilizer is further prolonged by combining urea formaldehyde slow release nitrogen. According to some embodiments of the present invention, the thiosulfate may be at least one selected from the group consisting of potassium thiosulfate, ammonium thiosulfate and sodium thiosulfate. If the content of thiosulfate is too high, the salinity is possibly too high, and the safe risk exists when the thiosulfate is used for foliage spraying; if the thiosulfate content is too low, the duration of nitrogen release may be shortened.
In the double-effect slow-release nitrogen-containing biological stimulator composition, the content of the biological stimulator is 0.1-100 parts by weight, and the specific parts by weight can be 0.1, 1, 5, 10, 20, 30, 40, 50, 60, 70, 80, 90, 100 and the like. According to some embodiments of the present invention, the biostimulant may be at least one selected from the group consisting of seaweed extract, mineral humic acid, mineral potassium fulvate, biochemical potassium fulvate, bacteria metabolite, oligopeptide-like substance, and free amino acid-like substance. The content of the medium trace element-containing substance is 0.1 to 50 parts by weight, and the specific parts by weight may be, for example, 0.1, 1, 5, 10, 20, 30, 40, 50, etc. According to some embodiments of the present invention, the medium trace element-containing substance may be at least one selected from the group consisting of zinc ethylenediaminetetraacetate (EDTA-Zn), copper ethylenediaminetetraacetate (EDTA-Cu), manganese ethylenediaminetetraacetate (EDTA-Mn), boric acid, sodium octaborate tetrahydrate, sodium molybdate, ammonium molybdate, and magnesium sulfate. The medium trace elements and the biostimulant can play a role in high-efficiency biological nitrogen activation, can activate the activity of a key enzyme glutamine synthetase in the nitrogen circulation process of plants, promote root growth and chlorophyll synthesis and improve the quality and yield of crops. If the content of the medium and trace element-containing substances is too high, the water content in the system is less, the medium and trace elements cannot be completely dissolved, and solids are separated out from the product; if the content of the medium and trace element substances is too low, the growth requirement of the plants on the medium and trace elements can not be met. If the content of the biostimulant is too high, the water in the system is less and the biostimulant cannot be completely dissolved; if the content of the biostimulant is too low, the effect of the fertilizer may be affected.
In addition, the double-effect slow-release nitrogen-containing biostimulant composition also contains 0.5-20 parts by weight of an auxiliary agent, and the specific parts by weight can be 0.5, 1, 2.5, 5, 7.5, 10, 12.5, 15, 17.5, 20 and the like. According to some embodiments of the present invention, the auxiliary may be at least one selected from an aldehyde-based polymerization inhibitor, a penetrating agent, an adhesive agent, a tank mix auxiliary, and a flying prevention auxiliary. By adopting at least one of the additives, the application range of the fertilizer can be further improved, so that the fertilizer can be suitable for various application modes such as flushing application, foliage spraying and the like.
In conclusion, the biostimulant composition containing double-effect slow-release nitrogen provided by the invention has at least the following advantages:
(1) The content of nitrogen in the biological stimulant composition containing double-effect slow-release nitrogen is higher and is 22-37%.
(2) The biological stimulator composition containing double-effect slow-release nitrogen has the longest duration of 120 days by adopting a nitrogen source thiosulfate technology and a urea-formaldehyde-nitrogen double-effect slow-release effect.
(3) The biological stimulator composition containing the double-effect slow-release nitrogen has high storage stability and is a clear solution at the low temperature of less than or equal to minus 20 ℃; the air inflation is avoided at the high temperature of more than or equal to 54 ℃, and the components are stable; normal temperature storage is more than 48 months.
(4) This contain biological stimulin composition high concentration foliage spray security of economic benefits and social benefits slow-release nitrogen, unmanned aerial vehicle spraying fertilizer water ratio 1 spraying, atomizer spraying 1.
(5) The biological stimulator composition containing double-effect slow-release nitrogen can be mixed with a plurality of pesticide products to improve the fertilizer efficiency and the pesticide effect. The combination of multiple additives can improve the wetting property, the spreading property and the permeability of the product and reduce the drift, thereby effectively improving the pesticide effect and the fertilizer effect.
In another aspect of the present invention, the present invention provides a method for preparing the biostimulant composition containing dual effect sustained release nitrogen of the above embodiments.
First, according to an embodiment of the present invention, after mixing a nitrogen source and ammonia water, a polymeric aldehyde substance is added to the resultant mixture, and then a reaction is performed to obtain a first mixture.
Further, according to an embodiment of the present invention, the pH of the first mixed material is adjusted to 8 to 11. In this step, the pH of the first mixed material may be adjusted to 8 to 11 using an alkaline compound and/or ammonia water, so as to maintain the system in an alkaline condition, avoid the presence of hydrogen ions, and prevent the product from solidifying.
According to some embodiments of the invention, the reaction is carried out at 70 to 120 ℃ for 0.5 to 6 hours. Specifically, the reaction temperature can be 70 ℃, 80 ℃, 90 ℃, 100 ℃, 110 ℃, 120 ℃ and the like, and the reaction time can be 0.5h, 1h, 2h, 3h, 4h, 5h, 6h and the like. If the reaction temperature is too high or the reaction time is too long, the product may be over-polymerized, resulting in solid precipitation of the product; if the reaction temperature is too low or the reaction time is too short, the reaction may be incomplete, resulting in precipitation of unreacted raw materials after cooling.
According to some embodiments of the invention, after the reaction is completed, the temperature of the first mixed material is reduced to 40-60 ℃. The polymerization reaction can be stopped after the temperature is reduced, and the generation of precipitate caused by excessive polymerization is avoided.
Further, thiosulfate, biological stimulin, medium and trace element-containing substances and auxiliaries are added into the first mixed material, so that the double-effect slow-release nitrogen-containing biological stimulin composition is obtained.
Further, according to some embodiments of the present invention, after the above reaction is completed, it is preferable to add the aldehyde polymerization inhibitor to the first mixed material, and then add the other components. Thus, the progress of the polymerization reaction in the mixed material can be prevented to some extent, and the generation of solids can be prevented.
In addition, it should be noted that all the features and advantages described above for the biostimulant composition product containing dual effect sustained release nitrogen are also applicable to the method for preparing the biostimulant composition containing dual effect sustained release nitrogen, and are not described in detail herein.
The invention will now be described with reference to specific examples, which are intended to be illustrative only and not to be limiting in any way.
Example 1
The composition of the biological stimulant composition containing double-effect slow-release nitrogen comprises 600 parts by weight of urea, 120 parts by weight of paraformaldehyde, 130 parts by weight of ammonia water with the concentration of 25%, 15 parts by weight of KOH, 200 parts by weight of ammonium thiosulfate, 40 parts by weight of biological stimulant, 15 parts by weight of medium and trace element-containing substances and 10 parts by weight of auxiliary agent. Wherein the biological stimulator consists of 30 weight parts of potassium fulvate, 5 weight parts of glycine and 5 weight parts of glutamic acid. The medium trace element-containing substance consists of 5 parts by weight of EDTA-Zn, 5 parts by weight of EDTA-Mn and 5 parts by weight of sodium octaborate tetrahydrate. The auxiliary agent consists of 2 parts by weight of 10 percent formaldehyde polymerization inhibitor and 8 parts by weight of flying prevention auxiliary agent.
The preparation method of the biological stimulator composition containing double-effect slow-release nitrogen comprises the following steps:
s1: adding 600 parts by weight of urea and 130 parts by weight of 25% ammonia water into a reaction kettle, and mixing and stirring;
s2: after stirring uniformly, adding 120 parts by weight of paraformaldehyde, and then starting heating to 90 ℃ to react for 1h;
s3: after the reaction is finished, controlling the pH value to be in the range of 8-11 through 15 parts by weight of KOH;
s4: cooling to 60 ℃, and adding 2 parts by weight of 10% formaldehyde polymerization inhibitor;
s5: 200 parts by weight of 60% ammonium thiosulfate solution, 40 parts by weight of the biostimulant substance, 5 parts by weight of the medium trace element-containing substance and 8 parts by weight of the flying prevention aid are added, and the mixture is fully stirred for 2 hours.
S6: and cooling to room temperature to obtain the biological stimulator composition containing double-effect slow-release nitrogen.
The indexes of the biostimulant composition containing double-effect slow-release nitrogen prepared in the above are shown in table 1, and the stability evaluation result is shown in table 2.
TABLE 1
| Index (es) | Example 1 |
| Total nitrogen | 29％ |
| Urea-formaldehyde nitrogen | 11.6％ |
| Thiosulfuric acidSalt urea nitrogen | 17.4％ |
| pH (1 | 9.5 |
| Salting-out temperature/. Degree.C | <-20 |
TABLE 2
| Storage conditions | Store the results |
| Storing at-20 deg.C for 3 months | No crystal precipitation, good fluidity and stable component content |
| Storing at 54 deg.C for 3 months | Has no flatulence, good fluidity, no generation of solid substances, and stable component content |
| Storing at room temperature for 48 months | Has no flatulence, good fluidity, no generation of solid, and stable component content |
Evaluation of fertilizer duration:
soil culture experiments were performed. And weighing the soil sample and the fertilizer according to the total nitrogen culture amount required by each treatment. 100 parts of nitrogen in soil, 500 parts of nitrogen in fertilizer and 600 parts of total nitrogen culture amount. The culture soil sample is sealed by a preservative film and then is cultured in an incubator at 25 ℃. Sampling at multiple time intervals, analyzing the content of nitrate nitrogen in the cultured soil sample, and determining the fertilizer efficiency duration according to the time for the nitrate nitrogen in the cultured soil sample to reach 600 parts. Table 3 shows the time required for the nitrate nitrogen content to reach about 600 parts after the urea, the urea-formaldehyde clear solution and the double-effect slow-release nitrogen fertilizer are cultured and treated by soil. The experimental results show that: the conversion of nitrogen in various forms in the double-effect slow-release nitrogen fertilizer into nitrate nitrogen takes 96 days, so the slow-release period of the double-effect slow-release nitrogen fertilizer is as long as about 96 days.
TABLE 3
| Product(s) | The required time of nitrate nitrogen reaching 600 parts |
| Urea | 7 days |
| Urea formaldehydes | 85 days |
| Double-effect slow-release nitrogen fertilizer | 96 days |
Example 2
The biological stimulator composition containing double-effect slow-release nitrogen comprises 600 parts by weight of urea, 200 parts by weight of paraformaldehyde, 100 parts by weight of ammonia water with the concentration of 28%, 1 part by weight of KOH, 100 parts by weight of potassium thiosulfate, 20 parts by weight of biological stimulator, 15 parts by weight of medium-trace element-containing substances and 10 parts by weight of auxiliaries. Wherein the biological stimulator comprises 10 weight parts of seaweed extract and 10 weight parts of phenylalanine. The medium trace element-containing substance consists of 5 parts by weight of EDTA-Cu, 5 parts by weight of EDTA-Mn and 5 parts by weight of sodium octaborate tetrahydrate. The auxiliary agent consists of 2 parts by weight of 10 percent formaldehyde polymerization inhibitor and 8 parts by weight of flying prevention auxiliary agent.
The preparation method of the biological stimulator composition containing double-effect slow-release nitrogen comprises the following steps:
s1: adding 600 parts by weight of urea and 100 parts by weight of 28% ammonia water into a reaction kettle, and mixing and stirring;
s2: after stirring uniformly, adding 200 parts by weight of paraformaldehyde, and then starting heating to 100 ℃, wherein the reaction time is 1.5h;
s3: after the reaction is finished, controlling the pH value to be in the range of 8-11 by 1 weight part of KOH;
s4: cooling to 60 ℃, and adding 2 parts by weight of 10% formaldehyde polymerization inhibitor;
s5: 100 parts by weight of 60% potassium thiosulfate solution, 40 parts by weight of the biostimulant substance, 15 parts by weight of the medium and trace element-containing substance and 8 parts by weight of the flying prevention aid are added, and the mixture is fully stirred for 2 hours.
S6: and cooling to room temperature to obtain the biological stimulator composition containing double-effect slow-release nitrogen.
The indexes of the biostimulant composition containing double-effect slow-release nitrogen prepared in the above are shown in table 4, and the stability evaluation result is shown in table 5.
TABLE 4
| Index (I) | Example 2 |
| Total nitrogen | 30％ |
| Urea nitrogen | 18％ |
| Thiosulfate urea nitrogen | 12％ |
| pH (1 | 8.5 |
| Salting-out temperature/. Degree.C | <-20 |
TABLE 5
| Storage conditions | Store the results |
| Storing at-20 deg.C for 3 months | No crystal precipitation, good fluidity and stable component content |
| Storing at 54 deg.C for 3 months | No flatulence, good fluidity, no generation of solid substances, and stable component content |
| Storing at room temperature for 48 months | Has no flatulence, good fluidity, no generation of solid, and stable component content |
Evaluation of fertilizer duration:
soil culture experiments were performed. And weighing the soil sample and the fertilizer according to the total nitrogen culture amount required by each treatment. 100 parts of nitrogen in soil, 500 parts of nitrogen in fertilizer and 600 parts of total nitrogen culture amount. The culture soil sample is sealed by a preservative film and then cultured in an incubator at 25 ℃. Sampling at multiple time intervals, analyzing the content of nitrate nitrogen in the cultured soil sample, and determining the fertilizer efficiency duration according to the time for the nitrate nitrogen in the cultured soil sample to reach 600 parts. The following table 6 shows the time required for the nitrate nitrogen content to reach about 600 parts after the urea, the urea-formaldehyde clear solution and the double-effect slow-release nitrogen fertilizer are cultured and treated by soil. The experimental results show that: the nitrogen in various forms in the double-effect slow-release nitrogen fertilizer needs 108 days to be converted into nitrate nitrogen, so the slow-release period of the double-effect slow-release nitrogen fertilizer is as long as about 108 days.
TABLE 6
| Product(s) | The required time of nitrate nitrogen reaching 600 parts |
| Urea | 7 days |
| Urea formaldehydes | 85 days |
| Double-effect slow-release nitrogen fertilizer | 108 days |
Example 3
The composition of the biological stimulant composition containing double-effect slow-release nitrogen comprises 600 parts by weight of urea, 100 parts by weight of paraformaldehyde, 50 parts by weight of ammonia water with the concentration of 28%, 5 parts by weight of KOH, 50 parts by weight of ammonium thiosulfate, 0.2 part by weight of biological stimulant, 0.1 part by weight of medium and trace element-containing substance and 0.2 part by weight of auxiliary agent. Wherein the biostimulant comprises 0.1 weight part of glycine and 0.1 weight part of alanine. The medium trace element-containing substance was 0.1 part by weight of sodium molybdate. The auxiliary agent consists of 0.1 weight part of 10 percent formaldehyde polymerization inhibitor and 0.1 weight part of flying prevention auxiliary agent.
The preparation method of the biological stimulator composition containing double-effect slow-release nitrogen comprises the following steps:
s1: adding 600 parts by weight of urea and 50 parts by weight of 28% ammonia water into a reaction kettle, and mixing and stirring;
s2: after stirring uniformly, adding 100 parts by weight of paraformaldehyde, and then starting to heat to 100 ℃ for reaction for 1.5 hours;
s3: after the reaction is finished, controlling the pH value to be in the range of 8-11 by using 5 parts by weight of KOH;
s4: cooling to 60 ℃, and adding 0.1 part by weight of 10% formaldehyde polymerization inhibitor;
s5: adding 50 weight parts of 60% ammonium thiosulfate solution and 0.2 weight parts of the biological stimulator substance 0.1 weight parts of flight control adjuvant, and stirring for 2h.
S6: and cooling to room temperature to obtain the biological stimulator composition containing the double-effect slow-release nitrogen.
The indexes of the biostimulant composition containing double-effect slow-release nitrogen prepared in the above are shown in table 7, and the stability evaluation result is shown in table 8.
TABLE 7
TABLE 8
| Storage conditions | Store the results |
| Storing at-20 deg.C for 3 months | No crystal precipitation, good fluidity and stable component content |
| Storing at 54 deg.C for 3 months | No flatulence, good fluidity, no generation of solid substances, and stable component content |
| Storing at room temperature for 48 months | No flatulence, good fluidity, no solid generation, and stable component content |
Evaluation of fertilizer duration:
soil culture experiments were performed. And weighing the soil sample and the fertilizer according to the total nitrogen culture amount required by each treatment. 100 parts of nitrogen in soil, 500 parts of nitrogen in fertilizer and 600 parts of total nitrogen culture amount. The culture soil sample is sealed by a preservative film and then cultured in an incubator at 25 ℃. Sampling at multiple time intervals, analyzing the content of nitrate nitrogen in the cultured soil sample, and determining the fertilizer efficiency duration according to the time for the nitrate nitrogen in the cultured soil sample to reach 600 parts. The table below shows the time required for the nitrate nitrogen content to reach about 600 parts after the urea, the urea-formaldehyde clear solution and the double-effect slow-release nitrogen fertilizer are cultured and treated by soil. The experimental results show that: the nitrogen in various forms in the double-effect slow-release nitrogen fertilizer needs 120 days to be converted into nitrate nitrogen, so the slow-release period of the double-effect slow-release nitrogen fertilizer is as long as about 120 days.
TABLE 9
| Product(s) | The required time of nitrate nitrogen reaching 600 parts |
| Urea | 7 days |
| Urea formaldehydes | 85 days |
| Double-effect slow-release nitrogen fertilizer | 120 days |
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Moreover, various embodiments or examples and features of various embodiments or examples described in this specification can be combined and combined by one skilled in the art without being mutually inconsistent.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. A biostimulant type liquid fertilizer containing double-effect slow-release nitrogen is characterized by comprising the following components: 600 parts by weight of nitrogen source, 100-300 parts by weight of polymeric aldehyde substance, 50-150 parts by weight of ammonia water, 5-20 parts by weight of alkaline compound, 50-350 parts by weight of thiosulfate, 0.1-100 parts by weight of biostimulant, 0.1-50 parts by weight of medium trace element-containing substance and 0.5-20 parts by weight of auxiliary agent;
the total nitrogen in the biological stimulator type liquid fertilizer comprises urea-formaldehyde nitrogen and thiosulfate urea nitrogen, the content of the total nitrogen in the biological stimulator type liquid fertilizer is 30% -37%, and the content of the urea-formaldehyde nitrogen is 15% -18%;
polymerizing the aldehyde substances to form urea formaldehyde slow release nitrogen, wherein the urea formaldehyde slow release nitrogen and thiosulfate form double-effect slow release nitrogen;
the solid content of the biological stimulator liquid fertilizer is 76-95%.
2. The biostimulant type liquid fertilizer containing dual effect, slow release nitrogen of claim 1, wherein the nitrogen source is urea;
optionally, the polymeric aldehyde is paraformaldehyde;
optionally, the ammonia content of the ammonia water is 20-28%.
3. The biostimulant liquid fertilizer containing double-effect slow-release nitrogen of claim 1, wherein the auxiliary agent is at least one selected from aldehyde polymerization inhibitor, penetrant, adhesive, tank-mixing auxiliary agent and flying prevention auxiliary agent;
optionally, the basic compound is selected from at least one of sodium hydroxide, sodium carbonate, sodium bicarbonate, potassium hydroxide, potassium carbonate, potassium bicarbonate.
4. The biostimulant liquid fertilizer with dual effect slow release of nitrogen of claim 1 wherein the thiosulfate salt is at least one selected from the group consisting of potassium thiosulfate, ammonium thiosulfate, and sodium thiosulfate.
5. The dual-effect slow-release nitrogen-containing biostimulant liquid fertilizer as claimed in claim 1, wherein the biostimulant is at least one selected from seaweed extract, mineral humic acid, mineral potassium fulvate, biochemical potassium fulvate, bacteria metabolite, oligopeptide substance and free amino acid substance.
6. The biostimulant liquid fertilizer containing double-effect slow-release nitrogen of claim 1, wherein the medium trace element-containing substance is at least one selected from the group consisting of zinc ethylenediaminetetraacetate, copper ethylenediaminetetraacetate, manganese ethylenediaminetetraacetate, boric acid, sodium octaborate tetrahydrate, sodium molybdate, ammonium molybdate and magnesium sulfate.
7. A method for preparing the biostimulant liquid fertilizer containing double-effect slow-release nitrogen of any one of claims 1 to 6, which comprises the following steps:
(1) Mixing urea and ammonia water, adding polymeric aldehyde substances into the obtained mixed material, and then reacting to obtain a first mixed material;
(2) And adjusting the pH value of the first mixed material to 8-11, and then adding thiosulfate, biological stimulin, medium and trace element-containing substances and an auxiliary agent into the first mixed material to obtain the double-effect slow-release nitrogen-containing biological stimulin-type liquid fertilizer.
8. The method according to claim 7, wherein an aldehyde polymerization inhibitor is added to the first mixed material after the step (1).
9. The process according to claim 7, wherein the reaction is carried out at 70 to 120 ℃ for 0.5 to 6 hours.
10. A method according to claim 8, characterized in that after the reaction is completed, the first mix is cooled to 40-60 ℃.
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