CN111732489A - Clear liquid type organic high-potassium fertilizer and preparation method thereof - Google Patents
Clear liquid type organic high-potassium fertilizer and preparation method thereof Download PDFInfo
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- CN111732489A CN111732489A CN202010650104.2A CN202010650104A CN111732489A CN 111732489 A CN111732489 A CN 111732489A CN 202010650104 A CN202010650104 A CN 202010650104A CN 111732489 A CN111732489 A CN 111732489A
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05B—PHOSPHATIC FERTILISERS
- C05B7/00—Fertilisers based essentially on alkali or ammonium orthophosphates
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05B—PHOSPHATIC FERTILISERS
- C05B17/00—Other phosphatic fertilisers, e.g. soft rock phosphates, bone meal
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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
- C05G5/00—Fertilisers characterised by their form
- C05G5/20—Liquid fertilisers
- C05G5/23—Solutions
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Abstract
The invention discloses a clear liquid type organic high-potassium fertilizer which is prepared from the following raw materials in parts by weight: 9.2-15.5 parts of pure water, 8-10 parts of urea, 9-10 parts of phosphorus-potassium fertilizer, 30-35 parts of potassium hydroxide, 0-3 parts of trace elements, 33-38 parts of organic matters and 0.5-0.8 part of active substances; the invention also discloses a preparation method of the clear liquid type organic high-potassium fertilizer, which comprises the following steps: 1) adding pure water into a reaction kettle, starting a stirrer, opening cold water circulation, slowly adding a potassium hydroxide solution, and stirring until the pure water is completely dissolved; 2) slowly adding the organic matters into the reaction kettle one by one in a grading manner, and stirring until the organic matters are completely dissolved; 3) adding urea and phosphorus-potassium fertilizer into a reaction kettle, and stirring until the urea and the phosphorus-potassium fertilizer are completely dissolved; 4) adding trace elements and active substances, and stirring until all the trace elements and the active substances are dissolved; 5) and (3) standing the materials in the reaction kettle to normal temperature, filtering the materials by using a screen, performing sampling inspection, and performing stability test. The clear liquid type organic high-potassium fertilizer is prepared by chemical reaction and physical mixing, and has the advantages of comprehensive product nutrients, stable properties and obvious fertilizer efficiency.
Description
Technical Field
The invention relates to the field of liquid fertilizers, in particular to a clear liquid type organic high-potassium fertilizer and a preparation method thereof.
Background
The research on liquid fertilizers in China is late, the initial products of the liquid fertilizers are mostly elemental fertilizers such as ammonia water, urea ammonium nitrate liquid, nitric acid and phosphoric acid, the fertilizers are mostly elemental fertilizers, and are mostly strong acid and strong alkaline fertilizers, and the liquid fertilizers are very inconvenient to use. With the improvement of the technology, the compound macroelement liquid fertilizer and the clear liquid fertilizer are available on the market, but the problems exist, the production of the fertilizer in medium and small enterprises is limited, and the common problems of the clear liquid fertilizer, such as complex production process, high raw material level requirement and high product cost, low nutrient content, unstable crystal precipitation, layered precipitation and the like, cannot be popularized in a large area.
Wherein, the patents CN201410642231.2, CN201310512471.6 and CN 201410657832.0 respectively disclose a preparation method of a suspension type liquid fertilizer, and substances which are difficult to dissolve in water, such as a suspending agent, a thickening agent and the like are added, so that a facility spray head is easy to block in the application process, and the phenomena of layering and the like are easy to occur in long-term storage; patent CN102942412B discloses a macroelement water-soluble fertilizer and a preparation method thereof, wherein the raw materials of the macroelement water-soluble fertilizer comprise dipotassium phosphate, animal hair, feather and the like, the patent uses acid to hydrolyze the feather, the use of the acid increases the danger in the production process, and the color of the product is not clear liquid.
CN200910094172.9 and CN201711309634.5 disclose that phosphite is easier to be absorbed and transported by plants than phosphate radicals, and can treat various soil-borne diseases, but phosphorous acid cannot be detected according to a detection method referred to in national NY1107-2010, so that the actual detection of indexes of the whole product is lower than that of an identifier, and the product is illegal according to NY1107-2010 standard. The high-phosphorus high-calcium liquid compound fertilizer provided in CN201410385078.X has a clear liquid type formula, and a strong acid type solution, and does not meet NY1107-2010 standards from the pH angle. The production of clear liquid fertilizers from liquid nitrogen fertilizers, urea ammonium nitrate liquids, ammonium polyphosphate liquids, potassium chloride or potassium polyphosphate, which also exhibit crystallization at low temperatures, such as-10 c, from the introduction of the examples, is disclosed in CN201610728665.3 and CN 201610913584.0.
CN201410642432.2 discloses a method for preparing a high phosphorus and high potassium liquid compound fertilizer, which contains no nitrogen. CN201611246580.8, namely a clear liquid type high-potassium liquid, which only contains potassium elements and does not contain nitrogen and phosphorus elements, and CN201811634178.6 discloses a balanced clear liquid fertilizer, but cannot achieve a high-potassium or organic high-potassium clear liquid fertilizer. In the production process of CN201410415592.3, high-value raw materials such as potassium pyrophosphate and potassium formate are used, the product is clear liquid type, does not crystallize at low temperature, and is a conventional production mode of products on the market at present, but the clear liquid type high-potassium water-soluble fertilizer cannot be produced by the mode.
In summary, in the current research and published patents, clear liquid type macroelement fertilizers can be produced, but a fertilizer technology which can independently embody high-potassium clear liquid fertilizers and contains nitrogen, phosphorus and trace elements does not appear, and particularly, a technology which can highlight organic matters, high-potassium clear liquid type fertilizers, nitrogen, phosphorus and trace elements, and is stable and non-crystallization, non-layering and non-precipitation at low temperature (0 to-15 ℃) and high temperature (0 to 54 ℃) is not reported.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides the liquid fertilizer which has simple process and easy storage, can tightly chelate organic matters, major elements and trace elements, is stable and does not crystallize at low temperature (0 to minus 15 ℃) and high temperature (0 to 54 ℃) and does not delaminate or precipitate to form stable clear liquid fertilizer. The production process is simple, the product cost is low, and the method is suitable for production of various enterprises.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a clear liquid type organic high-potassium fertilizer is composed of the following raw materials in parts by weight: 9.2-15.5 parts of pure water, 8-10 parts of urea, 9-10 parts of phosphorus-potassium fertilizer, 30-35 parts of potassium hydroxide, 0-3 parts of trace elements, 33-38 parts of organic matters and 0.5-0.8 part of active substances.
Further, the phosphorus-potassium fertilizer is any one of potassium pyrophosphate and dipotassium hydrogen phosphate.
Furthermore, the trace elements are any two of boric acid, EDTA-Zn, EDTA-Fe and EDTA-Mn, and the components in the trace elements can supplement the trace elements required by plants.
Furthermore, the organic substances are any two of formic acid, acetic acid, glycerol, glycol, sorbitol and xylitol, and the organic substances provide organic matters for the product, so that the organic matters of the product are more than or equal to 280 g/L.
Furthermore, the active substance is one or more of polyglutamic acid, chitosan, phenylalanine, taurine and methionine, and can promote the conduction and absorption of potassium element by crops and improve the utilization rate of the fertilizer.
The preparation method of the clear liquid type organic high-potassium fertilizer comprises the following steps:
1) adding 9.2-15.5 parts of pure water into a reaction kettle, starting a stirrer, controlling the rotating speed at 45 revolutions per minute, starting a cold water cycle, controlling the temperature at 40 ℃, slowly adding 30-35 parts of potassium hydroxide solution, and stirring for 30 minutes until the potassium hydroxide is completely dissolved;
2) taking 33-38 parts of organic matters, slowly adding the organic matters into the reaction kettle one by one in a grading manner, and stirring for 2 hours in total until the organic matters are completely dissolved;
3) adding 8-10 parts of urea and 9-10 parts of phosphorus-potassium fertilizer into a reaction kettle, and stirring for 30 minutes until the urea and the phosphorus-potassium fertilizer are completely dissolved;
4) adding 0-3 parts of trace elements and 0.5-0.8 part of active substances, and stirring for 30 minutes until the trace elements and the active substances are completely dissolved;
5) standing the materials in the reaction kettle for 2 hours to normal temperature, filtering the materials by a 200-mesh screen, and performing sampling inspection, wherein the sampling inspection standard is that organic matters are more than or equal to 280g/L, N is more than or equal to 50g/L, and P is more than or equal to 50g/L2O5≥50g/L，K2O is more than or equal to 400g/L, the density is more than or equal to 1.4g/ml, the pH value is 6-9, no impurity exists, and the stability test is carried out under the following test conditions: freezing at-15 deg.C for 24 hr, storing at 54 deg.C for 14 days, and obtaining qualified product without crystallization, delamination, precipitation and cleaning.
Compared with the prior art, the invention has the beneficial effects that:
the invention provides a clear liquid type organic potash fertilizer and a preparation method thereof, wherein the selected materials are common chemical materials, and can be conveniently purchased in the market. The invention forms the clear liquid type organic high-potassium fertilizer by the way of chemical reaction and physical mixing of common chemical materials, and the product has the outstanding characteristics as follows:
(1) the nutrient is comprehensive, and the clear liquid fertilizer integrates organic matters, major elements of nitrogen, phosphorus and potassium and trace elements;
(2) the product index is high, the breakthrough of the technical standard of high organic matter and high potassium is realized, and the invention realizes the index of high potassium content, K2O is more than or equal to 400g/L, organic matter is more than or equal to 280g/L, N is more than or equal to 50g/L, P2O5More than or equal to 50g/L, and trace elements can be added according to needs;
(3) the product has stable properties, the appearance of the product is clear liquid type, the color of the product can be adjusted according to the needs, and the product does not precipitate, crystallize or delaminate at the temperature of-15-54 ℃;
(4) the product is legal and has obvious fertilizer effect, the technical indexes of the product completely conform to NY1107-2010 major element popularization products, and also can conform to organic water-soluble fertilizer standard popularization products, and active substances are specially added into the product, so that the nutrient absorption of crops can be fully promoted, and the coloring, fruit swelling and yield increasing effects of the high-potassium fertilizer can be embodied.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
A clear liquid type organic high-potassium fertilizer is composed of the following raw materials in parts by weight: 9.2 parts of pure water, 10 parts of urea, 10 parts of phosphorus-potassium fertilizer, 34 parts of potassium hydroxide, 3 parts of trace elements, 33 parts of organic matters and 0.8 part of active substances.
In this embodiment, the phosphorus-potassium fertilizer is potassium dihydrogen phosphate.
In the present embodiment, the trace elements are boric acid and EDTA-Zn, wherein the mass ratio of boric acid to EDTA-Zn is 9: 1.
In this embodiment, the organic substances are acetic acid and glycerol, wherein the mass ratio of acetic acid to glycerol is 15.5: 1.
In this example, the active substance is polyglutamic acid.
The preparation method of the clear liquid type organic high-potassium fertilizer comprises the following steps:
1) adding 9.2 parts of pure water into a reaction kettle, starting a stirrer, controlling the rotating speed at 45 revolutions per minute, opening a cold water cycle, controlling the temperature at 40 ℃, slowly adding 34 parts of potassium hydroxide solution, and stirring for 30 minutes until the potassium hydroxide is completely dissolved;
2) taking 33 parts of organic matters, wherein the acetic acid is 31 parts, the glycerol is 2 parts, firstly slowly adding the acetic acid into a reaction kettle, stirring for 1 hour till the acetic acid and the potassium hydroxide completely react, then adding the glycerol, stirring for 1 hour, and stirring for 2 hours in the step;
3) adding 10 parts of urea and 10 parts of monopotassium phosphate into a reaction kettle, and stirring for 30 minutes until the urea and the monopotassium phosphate are completely dissolved;
4) adding 3 parts of trace elements, wherein 2.7 parts of boric acid, 0.3 part of EDTA-Zns and 0.8 part of active substance polyglutamic acid, and stirring for 30 minutes until the trace elements and the active substance are completely dissolved;
5) and (3) standing the materials in the reaction kettle for 2 hours to normal temperature, filtering the materials by using a 200-mesh screen, and performing sampling inspection to obtain a clear liquid type organic high-potassium fertilizer product.
Example 2
A clear liquid type organic high-potassium fertilizer is composed of the following raw materials in parts by weight: 15.5 parts of pure water, 8 parts of urea, 9 parts of phosphorus-potassium fertilizer, 30 parts of potassium hydroxide, 0 part of trace elements, 37 parts of organic matters and 0.5 part of active substances.
In this embodiment, the phosphorus potassium fertilizer is potassium pyrophosphate.
In this example, the amount of the trace element added was 0 part.
In this embodiment, the organic substances are formic acid and ethylene glycol, wherein the mass ratio of formic acid to ethylene glycol is 2.7: 1.
In this embodiment, the active substances are phenylalanine and methionine, wherein the mass ratio of phenylalanine to methionine is 4: 1.
The preparation method of the clear liquid type organic high-potassium fertilizer comprises the following steps:
1) adding 15.5 parts of pure water into a reaction kettle, starting a stirrer, controlling the rotating speed at 45 revolutions per minute, opening a cold water cycle, controlling the temperature at 40 ℃, slowly adding 30 parts of potassium hydroxide solution, and stirring for 30 minutes until the potassium hydroxide is completely dissolved;
2) taking 37 parts of organic matters, wherein 27 parts of formic acid and 10 parts of ethylene glycol, slowly adding the formic acid into a reaction kettle, stirring for 1 hour till the formic acid and potassium hydroxide completely react, then adding the ethylene glycol, stirring for 1 hour, and stirring for 2 hours in the step;
3) adding 8 parts of urea and 9 parts of potassium pyrophosphate into a reaction kettle, and stirring for 30 minutes until the urea and the potassium pyrophosphate are completely dissolved;
4) adding 0.5 part of active substance, wherein 0.4 part of phenylalanine and 0.1 part of methionine, and stirring for 30 minutes until the active substance is completely dissolved;
5) and (3) standing the materials in the reaction kettle for 2 hours to normal temperature, filtering the materials by using a 200-mesh screen, and performing sampling inspection to obtain a clear liquid type organic high-potassium fertilizer product.
Example 3
A clear liquid type organic high-potassium fertilizer is composed of the following raw materials in parts by weight: 10 parts of pure water, 9 parts of urea, 9 parts of phosphorus-potassium fertilizer, 35 parts of potassium hydroxide, 2.5 parts of trace elements, 34 parts of organic matters and 0.5 part of active substances.
In this embodiment, the phosphorus-potassium fertilizer is potassium dihydrogen phosphate.
In the embodiment, the trace elements are EDTA-Fe and EDTA-Mn, wherein the mass ratio of the EDTA-Fe to the EDTA-Mn is 1: 1.
In this example, the organic substances were acetic acid and sorbitol, wherein the mass ratio of acetic acid to sorbitol was 16: 1.
In this embodiment, the active substances are chitosan and taurine, wherein the mass ratio of chitosan to taurine is 1: 1.
The preparation method of the clear liquid type organic high-potassium fertilizer comprises the following steps:
1) adding 10 parts of pure water into a reaction kettle, starting a stirrer, controlling the rotating speed at 45 revolutions per minute, opening a cold water cycle, controlling the temperature at 40 ℃, slowly adding 35 parts of potassium hydroxide solution, and stirring for 30 minutes until the potassium hydroxide is completely dissolved;
2) taking 34 parts of organic matter, wherein the acetic acid is 32 parts, the sorbitol is 2 parts, firstly slowly adding the acetic acid into a reaction kettle, stirring for 1.5 hours until the acetic acid and the potassium hydroxide completely react, then adding the sorbitol, stirring for 0.5 hour, and stirring for 2 hours in the step;
3) adding 9 parts of urea and 9 parts of monopotassium phosphate into a reaction kettle, and stirring for 30 minutes until the urea and the monopotassium phosphate are completely dissolved;
4) adding 2.5 parts of trace elements, wherein the weight of EDTA-Fe and the weight of EDTA-Mn are both 1.25 parts, adding 0.5 part of active substances, wherein the weight of chitosan and taurine are both 0.25 part, and stirring for 30 minutes until the trace elements and the active substances are completely dissolved;
5) and (3) standing the materials in the reaction kettle for 2 hours to normal temperature, filtering the materials by using a 200-mesh screen, and performing sampling inspection to obtain a clear liquid type organic high-potassium fertilizer product.
Example 4
A clear liquid type organic high-potassium fertilizer is composed of the following raw materials in parts by weight: 13.5 parts of pure water, 8 parts of urea, 9 parts of phosphorus-potassium fertilizer, 31 parts of potassium hydroxide, 0 part of trace elements, 38 parts of organic matters and 0.5 part of active substances.
In this embodiment, the phosphorus potassium fertilizer is potassium pyrophosphate.
In this example, the amount of the trace element added was 0 part.
In this example, the organic substances are formic acid and xylitol, wherein the mass ratio of formic acid to xylitol is 2.8: 1.
In this example, the active substances were polyglutamic acid and chitosan, wherein the mass ratio of polyglutamic acid to chitosan was 4: 1.
The preparation method of the clear liquid type organic high-potassium fertilizer comprises the following steps:
1) adding 13.5 parts of pure water into a reaction kettle, starting a stirrer, controlling the rotating speed at 45 revolutions per minute, opening a cold water cycle, controlling the temperature at 40 ℃, slowly adding 31 parts of potassium hydroxide solution, and stirring for 30 minutes until the potassium hydroxide is completely dissolved;
2) taking 38 parts of organic matters, wherein 28 parts of formic acid and 10 parts of xylitol, slowly adding the formic acid into a reaction kettle, stirring for 1.5 hours until the formic acid and potassium hydroxide completely react, then adding the xylitol, stirring for 0.5 hour, and stirring for 2 hours in the step;
3) adding 8 parts of urea and 9 parts of potassium pyrophosphate into a reaction kettle, and stirring for 30 minutes until the urea and the potassium pyrophosphate are completely dissolved;
4) adding 1 part of active substance, wherein 0.4 part of polyglutamic acid and 0.1 part of chitosan, and stirring for 30 minutes until the active substance is completely dissolved;
5) and (3) standing the materials in the reaction kettle for 2 hours to normal temperature, filtering the materials by using a 200-mesh screen, and performing sampling inspection to obtain a clear liquid type organic high-potassium fertilizer product.
The products prepared in the above examples were subjected to spot inspection, and the results are shown in table 1:
table 1 results of examination of products prepared in examples 1 to 4
Test example 1
The test site is selected from Liu-darku village in Xiaji county, Henan province, the watermelon variety is 8424 variety, 66.7 square meters are selected, 100 melon seedlings in the expansion period are selected, the first group is prepared by using the product prepared in example 1, the second group is prepared by using the product prepared in example 2, the third group is prepared by using the product prepared in example 3, the fourth group is prepared by using the product prepared in example 4, the blank group is sprayed with pure water with the same amount, and the control group is a market clear liquid fertilizer (the index is N + P)2O5+K2O is more than or equal to 500g/L, B + Zn + Fe is more than or equal to 3g/L), six groups of experimental leaves are adoptedSpraying 800 times on the surface, spraying the foliage, continuously spraying for 3 times, and spacing 7 days each time, wherein other foliar fertilizer products are not applied in the harvest period, and six groups of fertilizers applied in other forms keep consistent, such as fertilizer products, dosage and mode. Finally, the yield and the sugar degree are measured.
The test results are shown in table 2:
TABLE 2 watermelon 8424 variety yield and sugar content
As shown in Table 2, the fertilizers prepared in examples 1 to 4 and the commercial liquid fertilizer were improved in the yield and the sugar degree of the 8424 watermelon variety. Compared with the clear liquid fertilizer in the market, the fertilizer prepared in the examples 1 to 4 increases the watermelon yield by 2.99 to 4.65 percent and increases the sugar degree by 1.64 to 4.92 percent, thereby obviously improving the watermelon yield and the watermelon quality.
Test example 2
The test group used the clear liquid type organic high potassium fertilizer of examples 1-4, and the control group fertilizer was the commercial clear liquid type high potassium fertilizer product (index: organic matter is more than or equal to 280g/L, K2O is more than or equal to 500g/L), and five groups of tests are performed in total. The method is characterized in that nectarine is selected as a crop, the variety is Lichun, the test site is selected from the northern ancient village of the salt lake region in Shanxi province, 20 nectarine trees with the same growth vigor and age are selected, the five groups of experiments are carried out by spraying 800 times of leaf surfaces, spraying is continuously carried out for 3 times at intervals of 7 days, other leaf surface fertilizer products are not sprayed during the harvest period, and five groups of fertilizers applied in other forms are kept consistent, such as fertilizer products, the using amount and the mode.
The test results are shown in table 3:
TABLE 3 Lichun nectarine soluble solids and yield index
The soluble solids can represent the coloring of the nectarine variety, the higher the coloring is the better, as can be seen from table 3, compared with the commercial clear liquid high potassium fertilizer products, the clear liquid organic high potassium fertilizer products of examples 1-4 can significantly improve the soluble solids and yield of the korean spring nectarine, wherein the soluble solids are improved by 1.23-3.7%, and the yield is improved by 3.14-6.18%.
Claims (6)
1. A clear liquid type organic high-potassium fertilizer is characterized by comprising the following raw materials in parts by weight: 9.2-15.5 parts of pure water, 8-10 parts of urea, 9-10 parts of phosphorus-potassium fertilizer, 30-35 parts of potassium hydroxide, 0-3 parts of trace elements, 33-38 parts of organic matters and 0.5-0.8 part of active substances.
2. The clear organic high-potassium fertilizer according to claim 1, wherein the phosphorus-potassium fertilizer is any one of potassium pyrophosphate and dipotassium hydrogen phosphate.
3. The clear liquid type organic high-potassium fertilizer according to claim 1, wherein the trace elements are any two of boric acid, EDTA-Zn, EDTA-Fe, and EDTA-Mn.
4. The clear organic high-potassium fertilizer according to claim 1, wherein the organic substance is any two of formic acid, acetic acid, glycerol, ethylene glycol, sorbitol, and xylitol.
5. The clear organic high-potassium fertilizer according to claim 1, wherein the active substance is any one or more of polyglutamic acid, chitosan, phenylalanine, taurine and methionine.
6. The method for preparing the clear liquid type organic high potassium fertilizer according to claim 1, comprising the following steps:
1) adding 9.2-15.5 parts of pure water into a reaction kettle, starting a stirrer, controlling the rotating speed at 45 revolutions per minute, starting a cold water cycle, controlling the temperature at 40 ℃, slowly adding 30-35 parts of potassium hydroxide solution, and stirring for 30 minutes until the potassium hydroxide is completely dissolved;
2) taking 33-38 parts of organic matters, slowly adding the organic matters into the reaction kettle one by one in a grading manner, and stirring for 2 hours in total until the organic matters are completely dissolved;
3) adding 8-10 parts of urea and 9-10 parts of phosphorus-potassium fertilizer into a reaction kettle, and stirring for 30 minutes until the urea and the phosphorus-potassium fertilizer are completely dissolved;
4) adding 0-3 parts of trace elements and 0.5-0.8 part of active substances, and stirring for 30 minutes until the trace elements and the active substances are completely dissolved;
5) standing the materials in the reaction kettle for 2 hours to normal temperature, filtering the materials by a 200-mesh screen, and performing sampling inspection, wherein the sampling inspection standard is that organic matters are more than or equal to 280g/L, N is more than or equal to 50g/L, and P is more than or equal to 50g/L2O5≥50g/L，K2O is more than or equal to 400g/L, the density is more than or equal to 1.4g/ml, the pH value is 6-9, no impurity exists, and the stability test is carried out under the following test conditions: freezing at-15 deg.C for 24 hr, storing at 54 deg.C for 14 days, and obtaining qualified product without crystallization, delamination, precipitation and cleaning.
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| CN113387750A (en) * | 2021-07-14 | 2021-09-14 | 郑州郑氏化工产品有限公司 | Clear liquid type organic high-nitrogen fertilizer and preparation method thereof |
| CN115043687A (en) * | 2022-06-29 | 2022-09-13 | 山东施可丰生态农业工程有限公司 | High-potassium liquid fertilizer, production process and energy-saving production device |
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Application publication date: 20201002 |