CN110606779A - High-tower humic acid compound fertilizer and preparation method thereof - Google Patents

High-tower humic acid compound fertilizer and preparation method thereof Download PDF

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Publication number
CN110606779A
CN110606779A CN201910800025.2A CN201910800025A CN110606779A CN 110606779 A CN110606779 A CN 110606779A CN 201910800025 A CN201910800025 A CN 201910800025A CN 110606779 A CN110606779 A CN 110606779A
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humic acid
tower
mass
compound fertilizer
temperature
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李云利
孟宪英
李聪
宋天月
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Tangshan Luansheng Agricultural Technology Co Ltd
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Tangshan Luansheng Agricultural Technology Co Ltd
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    • CCHEMISTRY; METALLURGY
    • C05FERTILISERS; MANUFACTURE THEREOF
    • C05BPHOSPHATIC FERTILISERS
    • C05B7/00Fertilisers based essentially on alkali or ammonium orthophosphates
    • CCHEMISTRY; METALLURGY
    • C05FERTILISERS; MANUFACTURE THEREOF
    • C05GMIXTURES 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
    • C05G3/00Mixtures of one or more fertilisers with additives not having a specially fertilising activity

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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 discloses a high-tower humic acid compound fertilizer and a preparation method thereof, wherein the high-tower humic acid compound fertilizer comprises the following components in percentage by mass: 45-55% of urea, 15-25% of potassium chloride, 18-30% of monoammonium phosphate, 1.2-2% of ammonia water, 0.12-0.2% of defoaming agent, 6-10% of humic acid and 1-2% of biological bacteria. The preparation method adopts a high tower granulation technology, humic acid is treated by ammoniation, a defoaming agent is added to prevent slurry from overflowing, biological bacteria are added during cooling to improve the survival rate of the microbial inoculum, and the product utilizes humic acid, biological bacteria and organic matters to activate and repair soil, so that the effects of improving the utilization rate of nutrients, improving the quality of crops and improving the soil are realized.

Description

High-tower humic acid compound fertilizer and preparation method thereof
Technical Field
The invention relates to a high-tower compound fertilizer, in particular to a high-tower humic acid compound fertilizer and a preparation method thereof.
Background
One flower in crops and all depending on fertilizer, the common use of chemical fertilizer in agricultural production in China for many years makes great contribution to agricultural development, income increase of farmers and prosperity of rural areas. However, the long-term use of a large amount of chemical fertilizers also causes the over-high salt content of soil, the over-high concentration of harmful ions, easy hardening and the limitation of crop growth and development. The data show that the soil pollution of China is increasingly serious and the saline-alkali soil is rapidly increased. The improvement of soil and the protection of ecological environment have attracted the high attention of the government of China, so that China puts forward the aim of zero increase of the fertilizer in 2020.
A large amount of applications prove that the humic acid fertilizer has an obvious effect on soil improvement, but in the production process of the high tower process, humic acid reacts with urea at high temperature to cause slurry to overflow, so that normal production is influenced and potential safety hazards are generated, and the prepared product has high moisture content and has the quality problems of pulverization, caking and the like due to the fact that the moisture content of the humic acid is more than 10%. In addition, the temperature of the pulping process on the tower is high, so that the survival of microorganisms is not facilitated, and the microorganisms cannot be added in the high-tower granulation process. The problems cause that humic acid and biological bacteria cannot be added into the high-tower fertilizer, and the nutrient utilization rate of the fertilizer and the soil structure cannot be effectively improved.
Disclosure of Invention
The invention aims to provide a high-tower humic acid compound fertilizer which not only can provide major elements of nitrogen, phosphorus and potassium required by crops, but also contains humic acid, biological bacteria and organic matters. The humic acid, biological bacteria and organic matters are utilized to activate and repair the soil, so that the effects of improving the nutrient utilization rate and improving the soil are realized.
In order to solve the technical problems, the invention adopts the technical scheme that: the high-tower humic acid compound fertilizer is characterized in that urea accounts for 45-55% of the total input raw material amount by mass, potassium chloride accounts for 15-25% of the total input raw material amount by mass, monoammonium phosphate accounts for 18-30% of the total input raw material amount by mass, ammonia water accounts for 1.2-2% of the total input raw material amount by mass, a defoaming agent accounts for 0.12-0.2% of the total input raw material amount by mass, humic acid accounts for 6-10% of the total input raw material amount by mass, and biological bacteria accounts for 1-2% of the total input raw material amount by mass.
The preparation method of the high-tower humic acid compound fertilizer comprises the following steps:
(1) ammoniation of humic acid (for later use)
1.1 mixing materials: the measured ammonia water and humic acid are added into a mixing stirrer, and are uniformly stirred for 5-6min, a large amount of experiments are carried out, and the ammonia water is utilized to ammoniate the humic acid, so that a slurry overflow tank can be effectively controlled, and the water solubility of the humic acid can be improved.
1.2, drying and ammoniation: the mixed material enters a drying ammoniation machine, the ammoniation and drying treatment of humic acid is completed by utilizing the drying temperature, the temperature of gas at the outlet of the drying machine is controlled to be 60-70 ℃, the drying ammoniation time is 30-35min, the water content of the material is controlled to be below 1%, the ammonia water is decomposed too fast if the temperature is too high and the time is too long in the ammoniation process, the ammoniation effect is not achieved, and the ammoniation reaction is insufficient if the temperature is low and the time is too short, so that the ammoniation effect is also influenced;
(2) adding metered urea into a melting tank, controlling the temperature of the melting tank to be 125-130 ℃, and overflowing the melted urea solution to a primary mixing tank, wherein the melting temperature is particularly important in the process, if the melting temperature exceeds 135 ℃, urea is decomposed to generate a large amount of biuret, so that crops are burnt, the temperature is lower than 120 ℃, and the urea is easy to crystallize, so that the normal production is influenced; (ii) a
(3) Adding metered potassium chloride into a primary mixing tank, uniformly mixing the potassium chloride with a urea solution, controlling the temperature of the primary mixing tank to be 115-120 ℃, and overflowing the mixed molten material into a secondary mixing tank;
(4) adding monoammonium phosphate, humic acid prepared in the step (1) and a defoaming agent into a secondary mixing tank in a metering manner, and mixing the mixture with a molten material for less than 5min to obtain mixed molten slurry, wherein the temperature of the secondary mixing tank is controlled to be 105-110 ℃;
(5) emulsifying the mixed melted slurry by an emulsifying machine, completing spray granulation in a granulation tower by using a differential granulator, and naturally cooling in the granulation tower, wherein the temperature of material particles below the tower is less than 75 ℃;
(6) respectively carrying out coarse screening and fine screening on material particles below the tower, wherein the diameter of a screen hole of the coarse screen is 4.5mm, the diameter of a screen hole of the fine screen is 2.0mm, the screened particles with the diameter of more than 4.5mm and the screened particles with the diameter of less than 2.0mm return to a primary mixing tank, and qualified products enter a cooling machine;
(7) spraying the prepared biological bacterial liquid on qualified products at the inlet of a cooling machine in an atomizing mode, quickly sucking the biological bacterial liquid by utilizing the temperature of the biological bacterial liquid, adding the biological bacterial liquid in a cooling process, preventing a large amount of biological bacteria from being killed due to high temperature in a high tower granulation process, improving the survival rate of strains, and cooling for 30-35 min;
(8) and (4) feeding the cooled qualified product into a wrapping machine, and packaging after anti-caking treatment.
The mass ratio of the ammonia water to the humic acid is 1: 5, and after a plurality of tests, the ammonia water and the humic acid are mixed according to the proportion of 1: 5, so that the ammoniation effect is optimal.
The defoaming agent is emulsified silicone oil or higher alcohol fatty acid ester, and the defoaming agent is food grade and has no adverse effect on crops.
The mass ratio of the defoaming agent to the humic acid is 1: 50, the defoaming agent is used for eliminating foam generated by the reaction of urea and the humic acid under the high-temperature condition, and the humic acid is subjected to ammoniation treatment, so that slurry does not overflow from a tank, and the normal production is ensured.
The biological bacteria are one or two combinations of bacillus megaterium and bacillus subtilis, are soil beneficial bacteria, and have the effects of improving the utilization rate of the fertilizer, activating and repairing soil and being beneficial to absorption and utilization of crops.
The total nutrient content of the product is more than or equal to 48 percent, the humic acid content is more than or equal to 2.0 percent, the activated humic acid content is more than or equal to 1.0 percent, and the industrial standard of the humic acid fertilizer is met: G/T5046-.
Compared with the prior art, the high-tower humic acid compound fertilizer and the preparation method thereof have the following advantages: the product has comprehensive nutrition, contains major elements of nitrogen, phosphorus and potassium required by crops, and also contains humic acid, biological bacteria and organic matters. The product has the effects of promoting the fertilizer synergism, enhancing the soil fertility, improving the physical and chemical properties of the soil, improving the quality and the yield of crops and enhancing the disease resistance of the crops.
Drawings
FIG. 1 is a flow chart of a preparation method of the high-tower humic acid compound fertilizer.
Detailed Description
The invention is described in further detail below with reference to the following figures and specific examples:
as shown in fig. 1, the high-tower humic acid compound fertilizer is characterized in that urea accounts for 45-55% of the total input raw material amount by mass, potassium chloride accounts for 15-25% of the total input raw material amount by mass, monoammonium phosphate accounts for 18-30% of the total input raw material amount by mass, ammonia water accounts for 1.2-2% of the total input raw material amount by mass, a defoaming agent accounts for 0.12-0.2% of the total input raw material amount by mass, humic acid accounts for 6-10% of the total input raw material amount by mass, and biological bacteria accounts for 1-2% of the total input raw material amount by mass.
The preparation method of the high-tower humic acid compound fertilizer comprises the following steps:
(1) ammoniation of humic acid (for later use)
1.1 mixing materials: adding metered ammonia water and humic acid into a mixing stirrer, and uniformly stirring for 5-6 min;
1.2, drying and ammoniation: the mixed material enters a drying ammoniation machine, the ammoniation and drying treatment of humic acid is completed by utilizing the drying temperature, the temperature of gas at the outlet of the drying machine is controlled to be 60-70 ℃, the drying ammoniation time is 30-35min, and the water content of the material is controlled to be below 1%;
(2) adding metered urea into a melting tank, controlling the temperature of the melting tank to be 125-130 ℃, and overflowing the melted urea solution into a primary mixing tank;
(3) adding metered potassium chloride into a primary mixing tank, uniformly mixing the potassium chloride with a urea solution, controlling the temperature of the primary mixing tank to be 115-120 ℃, and overflowing the mixed molten material into a secondary mixing tank;
(4) adding monoammonium phosphate, humic acid prepared in the step (1) and a defoaming agent into a secondary mixing tank in a metering manner, and mixing the mixture with a molten material for less than 5min to obtain mixed molten slurry, wherein the temperature of the secondary mixing tank is controlled to be 105-110 ℃;
(5) emulsifying the mixed melted slurry by an emulsifying machine, completing spray granulation in a granulation tower by using a differential granulator, and naturally cooling in the granulation tower, wherein the temperature of material particles below the tower is less than 75 ℃;
(6) and respectively carrying out coarse screening and fine screening on material particles below the tower, wherein the diameter of a screen hole of the coarse screen is 4.5mm, the diameter of a screen hole of the fine screen is 2.0mm, the screened particles with the diameter more than 4.5mm and the screened particles with the diameter less than 2.0mm return to a primary mixing tank, and qualified products enter a cooling machine.
(7) Spraying the prepared biological bacterial liquid onto qualified products at the inlet of a cooling machine in an atomizing mode, and rapidly sucking the biological bacterial liquid by utilizing the temperature of the biological bacterial liquid, wherein the cooling time is 30-35 min;
(8) and (4) feeding the cooled qualified product into a wrapping machine, and packaging after anti-caking treatment.
The mass ratio of the ammonia water to the humic acid is 1: 5.
The defoaming agent is emulsified silicone oil or higher alcohol fatty acid ester.
The mass ratio of the defoaming agent to the humic acid is 1: 50.
The biological bacteria are one or the combination of bacillus megaterium and bacillus subtilis.
The total nutrient content of the product is more than or equal to 48 percent, the humic acid content is more than or equal to 2.0 percent, the activated humic acid content is more than or equal to 1.0 percent, and the industrial standard of the humic acid fertilizer is met: G/T5046-.
The invention is further illustrated by the following examples:
example 1: the product proportion is 26-10-12, taking the consumption quota of 1 ton of product raw materials as an example:
the specific production flow is as follows:
(1) ammoniation of humic acid (for later use)
14 kg of metered ammonia water (containing 25% of N, the mass percentage is the same as below) and 70 kg of humic acid (containing 40% of humic acid, 25% of activated humic acid and 75% of organic matters) are added into a mixing stirrer and stirred uniformly for 5.5 min. The stirred mixed material enters a drying ammoniation machine, the temperature of gas at the outlet of the drying machine is controlled at 65 ℃, the drying ammoniation time is 35min, and the water content of the material is controlled below 1%;
(2) adding 515 kg of metered urea (containing 46.2 percent of N) into a melting tank, controlling the temperature of the melting tank at 130 ℃, and overflowing the melted urea solution into a primary mixing tank;
(3) adding 195 kg of metered potassium chloride (containing K2O 62%) into a primary mixing tank, uniformly mixing with a urea solution by stirring, controlling the temperature of the primary mixing tank at 120 ℃, and overflowing the mixed molten material into a secondary mixing tank;
(4) 187 kg of metered monoammonium phosphate (containing N11% and P2O 554%), and 1.4 kg of humic acid and emulsified silicone oil treated in the step (1) are added into a secondary mixing tank, and are uniformly mixed with the molten material by stirring, wherein the temperature of the secondary mixing tank is controlled at 105 ℃, and the mixture is mixed with the molten material for 4min, so that mixed molten slurry is obtained;
(5) emulsifying the mixed and melted slurry by an emulsifying machine to prepare slurry with good flowing property, completing spray granulation in a granulation tower by using a differential granulator, naturally cooling in the granulation tower, and controlling the temperature of material particles below the tower at 70 ℃;
(6) and respectively carrying out coarse screening and fine screening on material particles below the tower, returning the screened particles with the particle size of more than 4.5mm and the screened particles with the particle size of less than 2.0mm to a primary mixing tank, and feeding qualified products into a cooling machine.
(7) Spraying 17.6 kilograms of prepared bacillus subtilis liquid on material particles in an atomizing mode at the inlet of a cooling machine, and then cooling for 35 min;
(8) and (4) feeding the cooled qualified product into a wrapping machine, performing anti-caking treatment and packaging to obtain the high-tower humic acid compound fertilizer with the granularity of 2-4.5 mm. The product contains 48.39% of total nutrient, 26.20% -10.10% -12.09% of N-P2O5-K2O, 2.8% of humic acid, 1.75% of activated humic acid, 0.8% of water and 36N of strength, and has smooth and round particles.
Example 2: the product proportion is 25-15-10, taking the consumption quota of 1 ton of product raw materials as an example:
the specific production flow is as follows:
(1) ammoniation of humic acid (for later use)
12 kg of metered ammonia water (containing 25% of N, the mass percentage is the same as below) and 60 kg of humic acid (containing 40% of humic acid, 25% of activated humic acid and 75% of organic matters) are added into a mixing stirrer and stirred uniformly for 5 min. The stirred mixed material enters a drying ammoniation machine, the temperature of gas at the outlet of the drying machine is controlled at 60 ℃, the drying ammoniation time is 30min, and the water content of the material is controlled below 1%;
(2) adding 472 kg of metered urea (containing 46.2 percent of N) into a melting tank, controlling the temperature of the melting tank at 125 ℃, and overflowing the melted urea solution into a primary mixing tank;
(3) adding 162 kg of metered potassium chloride (containing K2O 62%) into a primary mixing tank, uniformly mixing with a urea solution by stirring, controlling the temperature of the primary mixing tank at 115 ℃, and overflowing the mixed molten material into a secondary mixing tank;
(4) adding 280 kg of metered monoammonium phosphate (containing 11% of N and 554% of P2O) and 1.2 kg of humic acid and higher alcohol fatty acid ester treated in the step (1) into a secondary mixing tank, uniformly mixing with a molten material by stirring, controlling the temperature of the secondary mixing tank at 110 ℃, and mixing with the molten material for 4.5min to obtain mixed molten slurry;
(5) emulsifying the mixed and melted slurry by an emulsifying machine to prepare slurry with good flowing property, completing spray granulation in a granulation tower by using a differential granulator, naturally cooling in the granulation tower, and controlling the temperature of material particles below the tower at 70 ℃;
(6) and respectively carrying out coarse screening and fine screening on material particles below the tower, returning the screened particles with the particle size of more than 4.5mm and the screened particles with the particle size of less than 2.0mm to a primary mixing tank, and feeding qualified products into a cooling machine.
(7) Spraying 12.8 kilograms of prepared bacillus megaterium liquid to material particles at an inlet of a cooling machine in an atomizing mode, and then cooling for 35 min;
(8) and (4) feeding the cooled qualified product into a wrapping machine, performing anti-caking treatment and packaging to obtain the high-tower humic acid compound fertilizer with the granularity of 2-4.5 mm. The product contains 50.35 percent of total nutrient, 25.19 to 15.12 to 10.04 percent of N-P2O5-K2O, 2.4 percent of humic acid, 1.5 percent of activated humic acid, 0.6 percent of water and 39N of strength, and smooth and round particles.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims (6)

1. The high-tower humic acid compound fertilizer is characterized in that urea accounts for 45-55% of the total input raw material amount by mass, potassium chloride accounts for 15-25% of the total input raw material amount by mass, monoammonium phosphate accounts for 18-30% of the total input raw material amount by mass, ammonia water accounts for 1.2-2% of the total input raw material amount by mass, a defoaming agent accounts for 0.12-0.2% of the total input raw material amount by mass, humic acid accounts for 6-10% of the total input raw material amount by mass, and biological bacteria accounts for 1-2% of the total input raw material amount by mass.
The preparation method of the high-tower humic acid compound fertilizer comprises the following steps:
(1) ammoniation of humic acid (for later use)
1.1 mixing materials: adding metered ammonia water and humic acid into a mixing stirrer, and uniformly stirring for 5-6 min;
1.2, drying and ammoniation: the mixed material enters a drying ammoniation machine, the ammoniation and drying treatment of humic acid is completed by utilizing the drying temperature, the temperature of gas at the outlet of the drying machine is controlled to be 60-70 ℃, the drying ammoniation time is 30-35min, and the water content of the material is controlled to be below 1%;
(2) adding metered urea into a melting tank, controlling the temperature of the melting tank to be 125-130 ℃, and overflowing the melted urea solution into a primary mixing tank;
(3) adding metered potassium chloride into a primary mixing tank, uniformly mixing the potassium chloride with a urea solution, controlling the temperature of the primary mixing tank to be 115-120 ℃, and overflowing the mixed molten material into a secondary mixing tank;
(4) adding monoammonium phosphate, humic acid prepared in the step (1) and a defoaming agent into a secondary mixing tank in a metering manner, and mixing the mixture with a molten material for less than 5min to obtain mixed molten slurry, wherein the temperature of the secondary mixing tank is controlled to be 105-110 ℃;
(5) emulsifying the mixed melted slurry by an emulsifying machine, completing spray granulation in a granulation tower by using a differential granulator, and naturally cooling in the granulation tower, wherein the temperature of material particles below the tower is less than 75 ℃;
(6) and respectively carrying out coarse screening and fine screening on material particles below the tower, wherein the diameter of a screen hole of the coarse screen is 4.5mm, the diameter of a screen hole of the fine screen is 2.0mm, the screened particles with the diameter more than 4.5mm and the screened particles with the diameter less than 2.0mm return to a primary mixing tank, and qualified products enter a cooling machine.
(7) Spraying the prepared biological bacterial liquid onto qualified products at the inlet of a cooling machine in an atomizing mode, and rapidly sucking the biological bacterial liquid by utilizing the temperature of the biological bacterial liquid, wherein the cooling time is 30-35 min;
(8) and (4) feeding the cooled qualified product into a wrapping machine, and packaging after anti-caking treatment.
2. The high-tower humic acid compound fertilizer as claimed in claim 1, wherein the mass ratio of ammonia water to humic acid is 1: 5.
3. The high-tower humic acid compound fertilizer as claimed in claim 1, wherein the defoaming agent is emulsified silicone oil or higher alcohol fatty acid ester.
4. The high-tower humic acid compound fertilizer as claimed in claim 1, wherein the mass ratio of the defoaming agent to the humic acid is 1: 50.
5. The high-tower humic acid compound fertilizer as claimed in claim 1, wherein the biological bacteria is one or a combination of bacillus megaterium and bacillus subtilis.
6. The high-tower humic acid compound fertilizer as claimed in claim 1, wherein the total nutrient content of the product is not less than 48%, the humic acid content is not less than 2.0%, the activated humic acid content is not less than 1.0%, and the industrial standard of the humic acid fertilizer is satisfied: G/T5046-2016.
CN201910800025.2A 2019-08-26 2019-08-26 High-tower humic acid compound fertilizer and preparation method thereof Withdrawn CN110606779A (en)

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Cited By (13)

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CN111517857A (en) * 2020-04-26 2020-08-11 刘会英 High-tower continuous cropping-preventing urea-based fertilizer and preparation method thereof
CN111533612A (en) * 2020-04-26 2020-08-14 刘会英 High-tower organic-inorganic nitro-sulfur-based fertilizer and preparation method thereof
CN111559934A (en) * 2020-04-20 2020-08-21 张瑞霞 High tower fertilizer with quick-acting, slow-releasing and controlled-releasing functions and preparation method thereof
CN111559941A (en) * 2020-04-20 2020-08-21 杨新正 Urea ammonium nitrogen fertilizer with soil improvement function and preparation method thereof
CN111574274A (en) * 2020-04-23 2020-08-25 孟宪英 High-tower continuous cropping-preventing nitro-sulfur-based fertilizer and preparation method thereof
CN111574278A (en) * 2020-04-23 2020-08-25 陈志付 High-tower slow-release humic acid sulfur-based compound fertilizer and preparation method thereof
CN111574279A (en) * 2020-04-23 2020-08-25 陈志付 High-tower quick-acting nitrogen fertilizer with soil improvement function and preparation method thereof
CN111646836A (en) * 2020-04-20 2020-09-11 杨新正 Organic-inorganic high-tower urea-based fertilizer and preparation method thereof
CN111704506A (en) * 2020-06-28 2020-09-25 河北百禾丰化肥有限公司 Preparation method of high-activity humic acid high-tower compound fertilizer
CN111718222A (en) * 2020-06-28 2020-09-29 河北百禾丰化肥有限公司 Preparation method of high-tower slow-release compound fertilizer
CN112679273A (en) * 2021-01-07 2021-04-20 中诚国联(河南)生物科技有限公司 High-tower pesticide-fertilizer containing thifluzamide and azoxystrobin and application thereof
CN113800971A (en) * 2021-09-18 2021-12-17 阿克苏嘉邦肥业有限公司 Production method of high-tower high-activity humic acid compound fertilizer
CN114380650A (en) * 2022-02-24 2022-04-22 天脊煤化工集团股份有限公司 Phosphorus potassium nitrate composite microbial fertilizer and preparation method thereof

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CN109485523A (en) * 2018-12-25 2019-03-19 孟宪英 Microelement bio-feritlizer and preparation method in a kind of high activity organic multicomponent
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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111559941A (en) * 2020-04-20 2020-08-21 杨新正 Urea ammonium nitrogen fertilizer with soil improvement function and preparation method thereof
CN111646836A (en) * 2020-04-20 2020-09-11 杨新正 Organic-inorganic high-tower urea-based fertilizer and preparation method thereof
CN111559934A (en) * 2020-04-20 2020-08-21 张瑞霞 High tower fertilizer with quick-acting, slow-releasing and controlled-releasing functions and preparation method thereof
CN111574279A (en) * 2020-04-23 2020-08-25 陈志付 High-tower quick-acting nitrogen fertilizer with soil improvement function and preparation method thereof
CN111574274A (en) * 2020-04-23 2020-08-25 孟宪英 High-tower continuous cropping-preventing nitro-sulfur-based fertilizer and preparation method thereof
CN111574278A (en) * 2020-04-23 2020-08-25 陈志付 High-tower slow-release humic acid sulfur-based compound fertilizer and preparation method thereof
CN111517857A (en) * 2020-04-26 2020-08-11 刘会英 High-tower continuous cropping-preventing urea-based fertilizer and preparation method thereof
CN111533612A (en) * 2020-04-26 2020-08-14 刘会英 High-tower organic-inorganic nitro-sulfur-based fertilizer and preparation method thereof
CN111704506A (en) * 2020-06-28 2020-09-25 河北百禾丰化肥有限公司 Preparation method of high-activity humic acid high-tower compound fertilizer
CN111718222A (en) * 2020-06-28 2020-09-29 河北百禾丰化肥有限公司 Preparation method of high-tower slow-release compound fertilizer
CN112679273A (en) * 2021-01-07 2021-04-20 中诚国联(河南)生物科技有限公司 High-tower pesticide-fertilizer containing thifluzamide and azoxystrobin and application thereof
CN113800971A (en) * 2021-09-18 2021-12-17 阿克苏嘉邦肥业有限公司 Production method of high-tower high-activity humic acid compound fertilizer
CN114380650A (en) * 2022-02-24 2022-04-22 天脊煤化工集团股份有限公司 Phosphorus potassium nitrate composite microbial fertilizer and preparation method thereof

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Application publication date: 20191224