CN112279725A - Full-water-soluble nitro-particle water-soluble fertilizer and preparation method thereof - Google Patents
Full-water-soluble nitro-particle water-soluble fertilizer and preparation method thereof Download PDFInfo
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- CN112279725A CN112279725A CN202011351329.4A CN202011351329A CN112279725A CN 112279725 A CN112279725 A CN 112279725A CN 202011351329 A CN202011351329 A CN 202011351329A CN 112279725 A CN112279725 A CN 112279725A
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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
- C05G3/30—Anti-agglomerating additives; Anti-solidifying additives
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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
- 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
- C05G3/44—Mixtures of one or more fertilisers with additives not having a specially fertilising activity for affecting fertiliser dosage or release rate; for affecting solubility 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
- C05G3/80—Soil conditioners
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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
- C05G5/10—Solid or semi-solid fertilisers, e.g. powders
- C05G5/12—Granules or flakes
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- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Pest Control & Pesticides (AREA)
- Soil Sciences (AREA)
- Fertilizers (AREA)
Abstract
The invention discloses a full water-soluble nitro-particle water-soluble fertilizer, which comprises the following raw materials: the composite material comprises the following raw materials: 73% of monoammonium phosphate, full water-soluble potassium sulfate, dipotassium hydrogen phosphate, potassium chloride, ammonium nitrate, production auxiliary materials, magnesium sulfate, zinc sulfate, manganese sulfate, boric acid, a synergist and a water-soluble anti-caking agent. The clear liquid type nitro granular water soluble fertilizer has the advantages of cheap and easily obtained raw materials, simple process, obvious effect, difficult caking and pulverization of products, easy storage and transportation and good market prospect.
Description
Technical Field
The invention relates to the field of agricultural fertilizer manufacturing, and particularly relates to a full water-soluble nitro-particle water-soluble fertilizer and a preparation method thereof.
Background
In recent decades, the phenomena of water and fertilizer resource consumption and waste in agricultural production in China are serious, the problem of water and fertilizer resource shortage is more and more prominent along with the agricultural development in China, and water and fertilizer conservation are necessary requirements for developing characteristic sustainable agriculture. The water-soluble fertilizer is identical with the modern agriculture concepts of energy conservation, environmental protection, ecological efficiency and the like at present, and is an effective carrier for rapidly converting the traditional agriculture to the modern agriculture. A large amount of water-soluble fertilizer products appear in the market at present, the product quality is uneven, especially, the granular water-soluble fertilizer products are high in price, or flocculation and precipitation phenomena appear in the actual use process, irrigation equipment is easy to block, nutrient elements are easy to lose, the use cost of farmers is increased, and soil hardening can also be caused.
Therefore, the market urgently needs to develop a low-price and high-efficiency full-water-soluble nitro-particle water-soluble fertilizer which can comprehensively provide nutrients required by crop growth and prevent irrigation equipment from being blocked.
Disclosure of Invention
The invention mainly aims to provide a production method of a full water-soluble nitro-particle water-soluble fertilizer, the raw materials used in the method are cheap and easy to obtain, the obtained product is rich and balanced in nutrition, the content of insoluble substances in water is effectively reduced, the utilization rate of the fertilizer is improved, meanwhile, the blockage of drip irrigation equipment can be effectively avoided, the service life of the drip irrigation equipment is prolonged, and the method is particularly suitable for being applied to areas with higher water hardness for irrigation, karst landform areas or alkaline soil. .
A full water-soluble nitro-particle water-soluble fertilizer comprises the following raw materials: 73% of monoammonium phosphate, full water-soluble potassium sulfate, dipotassium hydrogen phosphate, potassium chloride, ammonium nitrate, production auxiliary materials, magnesium sulfate, zinc sulfate, manganese sulfate, boric acid, a synergist and a water-soluble anti-caking agent.
The high-potassium formula fertilizer of the all-water-soluble nitro-particle water soluble fertilizer comprises the following raw materials in parts by weight:
4-12 parts of 73% monoammonium phosphate
30-55 parts of full water-soluble potassium sulfate
5-20 parts of dipotassium phosphate
2-8 parts of potassium chloride
45-60 parts of ammonium nitrate
3-20 parts of production auxiliary materials
Magnesium sulfate 0.5-2 parts
0.2 to 1 portion of zinc sulfate
0.2-1 part of manganese sulfate
0.2 to 1 portion of boric acid
0.2 to 2 portions of synergist
0.5-1.5 parts of water-soluble anti-caking agent.
The balanced formula of the full water-soluble nitro-particle water-soluble fertilizer comprises the following raw materials in parts by weight:
15-35 parts of 73% monoammonium phosphate
20-35 parts of full water-soluble potassium sulfate
2-8 parts of potassium chloride
4-10 parts of dipotassium hydrogen phosphate
30-50 parts of ammonium nitrate
3-20 parts of production auxiliary materials
Magnesium sulfate 0.5-2 parts
0.2 to 1 portion of boric acid
0.2 to 1 portion of zinc sulfate
0.2-1 part of manganese sulfate
0.2 to 2 portions of synergist
0.5-1.5 parts of water-soluble anti-caking agent.
The production auxiliary materials are one or more of solid sulfuric acid, citric acid, tartaric acid and concentrated phosphoric acid.
The synergist is one or more of amino acid, polysaccharide and alginic acid. According to the high-efficiency utilization and functional requirements of crop nutrients, fertilizer synergistic substances can be added in the material preparation process according to the requirements. The fertilizer synergistic substance is amino acids such as fish protein, polypeptide amino acids, polyglutamic acid, polyaspartic acid zinc and the like, organic substances such as chitosan oligosaccharide, biochemical fulvic acid potassium, molasses fermentation liquor, potassium humate, mineral source fulvic acid potassium, seaweed fine powder, algae source kinetin and the like, and nitrogen long-acting digestion inhibitors such as DCD, DMPP and the like.
A preparation method of a full water-soluble nitro-particle water-soluble fertilizer adopts a high tower granulation method, and comprises the following steps:
s1, preparing raw materials of each component according to the weight parts;
s2, conveying ammonium nitrate through a jacket heat-insulating pipeline, metering, conveying the ammonium nitrate into a melting tank on the tower, metering half of the total weight of 73% monoammonium phosphate, conveying the metered ammonium nitrate into the melting tank, and heating the melting tank by a steam coil at the temperature of 160 ℃ and 170 ℃; meanwhile, the boric acid, the zinc sulfate and the manganese sulfate which are mixed in proportion are metered and sent to a primary mixing tank, potassium chloride powder and the rest 73 percent of monoammonium phosphate are metered and then added into the primary mixing tank, and the temperature of the primary mixing tank is 160-165 ℃; the metered fully water-soluble potassium sulfate, dipotassium hydrogen phosphate, magnesium sulfate, synergist and production auxiliary materials enter a secondary mixing tank, and the temperature of the secondary mixing tank is 155-;
and S3, allowing the uniformly stirred slurry to flow out of the secondary mixing tank, passing through an emulsifier, granulating, cooling, screening, adding a water-soluble anti-caking agent, and packaging to obtain a finished product.
A preparation method of a full water-soluble nitro-particle water-soluble fertilizer uses a rotary drum granulation method in a granulation method, and comprises the following steps:
t1, dissolving ammonium nitrate in water to prepare ammonium nitrate solution, metering and pumping into a rotary drum granulator, and spraying into the rotary drum granulator through a slurry sprayer;
t2, weighing the rest materials according to the proportion, uniformly mixing, conveying into a rotary drum granulator, and binding into fertilizer granules under the continuous rolling of the rotary drum granulator;
t3, drying, cooling and screening the fertilizer granules from the rotary drum granulator, adding a water-soluble anti-caking agent, and packaging to obtain the finished product.
The macroelement water-soluble fertilizer is a full water-soluble nitro-particle water-soluble fertilizer containing macroelements and medium and trace elements, the fertilizer has the advantages of cheap and easily-obtained raw materials, high nutrient utilization rate, drip irrigation, foliage spraying and flushing application, and is particularly suitable for water resource shortage areas and saline-alkali lands.
The production auxiliary materials are used as a fertilizer pH value regulator and an inorganic polyvalent metal ion solubilizer, so that the pH value of the finished fertilizer is in a slightly acidic range, the solubility of inorganic metal ions in water is increased, the activity of nutrient elements such as calcium, magnesium, zinc, manganese and the like in soil is enhanced, flocculation precipitation formed by polyvalent metal ions and anion groups mainly comprising phosphate radicals is avoided, the absorption of crops to fertilizer nutrients is improved, the loss of the nutrient elements is reduced, and the physical and chemical properties and the soil structure of the soil are improved.
The clear liquid type nitro granular water soluble fertilizer has the advantages of cheap and easily obtained raw materials, simple process, obvious effect, difficult caking and pulverization of products, easy storage and transportation and good market prospect.
Detailed Description
The present invention will be further illustrated with reference to the following examples.
< example 1>
A full water-soluble nitro-particle water-soluble fertilizer is prepared by a granulation mode of a high tower, and the formula comprises the following components in parts by weight: 49 parts of ammonium nitrate, 24.3 parts of full-water-soluble potassium sulfate, 5.4 parts of potassium chloride, 8.4 parts of dipotassium hydrogen phosphate, 28 parts of 73% monoammonium phosphate, 6 parts of solid sulfuric acid, 1.2 parts of magnesium sulfate, 0.8 part of zinc sulfate, 0.8 part of manganese sulfate, 0.6 part of boric acid, 0.6 part of amino acid and 0.7 part of water-soluble anti-caking agent.
Ammonium nitrate is obtained from an ammonium nitrate device and is subjected to two-stage concentration to about 99wt% ammonium nitrate solution, the ammonium nitrate solution is conveyed through a jacket heat-insulating pipeline, the ammonium nitrate solution is conveyed into a melting tank on the tower after being metered, meanwhile, one half of 73% monoammonium phosphate crystals are conveyed into the melting tank after being metered, and a steam coil is arranged in the melting tank for heating, and the temperature is 160-170 ℃. Meanwhile, the mixed boric acid, zinc sulfate and manganese sulfate are metered and sent to a primary mixing tank, the potassium chloride powder and the residual 73 percent monoammonium phosphate are metered and then added into the primary mixing tank, and the temperature of the primary mixing tank is 160-165 ℃. The metered fully water-soluble potassium sulfate, dipotassium hydrogen phosphate, magnesium sulfate and solid sulfuric acid enter a secondary mixing tank, and the temperature of the secondary mixing tank is 155-. The evenly stirred slurry passes through an emulsifier, a differential granulator and is sprayed to a belt under the tower, and the mixture passes throughCooling, screening, adding a water-soluble anti-caking agent, and packaging to obtain the clear liquid type nitro granular water-soluble fertilizer. Through testing, the fertilizer contains N: 17.45%, P2O5：16.80%，K2O: 16.86, total nutrients: 51.11%, water insoluble: < 0.01%, pH: 3.91 and the fertilizer strength is 61.2N. After being dissolved in water with the hardness of more than 800 ℃ according to a certain proportion, the water solution is clear without flocculation and precipitation. The fertilizer is piled up 20 layers in height, and no pulverization and no caking are generated within 6 months.
< example 2>
A full water-soluble nitro-particle water-soluble fertilizer is prepared by a granulation mode of a high tower, and the formula comprises the following components in parts by weight: 46 parts of ammonium nitrate, 50 parts of fully water-soluble potassium sulfate, 6 parts of potassium chloride, 11 parts of dipotassium hydrogen phosphate, 8 parts of 73% monoammonium phosphate, 4 parts of citric acid, 1.2 parts of magnesium sulfate, 0.8 part of manganese sulfate, 0.8 part of zinc sulfate, 0.6 part of boric acid, 0.7 part of polysaccharide and 0.7 part of water-soluble anti-caking agent.
Ammonium nitrate is obtained from an ammonium nitrate device and is subjected to two-stage concentration to about 99wt% ammonium nitrate solution, the ammonium nitrate solution is conveyed through a jacket heat-insulating pipeline, the ammonium nitrate solution is conveyed into a melting tank on the tower after being metered, meanwhile, one half of 73% monoammonium phosphate crystals are conveyed into the melting tank after being metered, and a steam coil is arranged in the melting tank for heating, and the temperature is 160-170 ℃. Meanwhile, the mixed boric acid and zinc sulfate are metered into a primary mixing tank, the potassium chloride powder and the residual 73 percent monoammonium phosphate are metered and then added into the primary mixing tank, and the temperature of the primary mixing tank is 160-165 ℃. The metered fully water-soluble potassium sulfate, dipotassium hydrogen phosphate, magnesium sulfate and solid sulfuric acid enter a secondary mixing tank, and the temperature of the secondary mixing tank is 145-155 ℃. And (3) spraying the uniformly stirred slurry to a belt below the tower through an emulsifier and a differential granulator, cooling, screening, adding a water-soluble anti-caking agent, and packaging to obtain the clear liquid type nitro granular water-soluble fertilizer. Through testing, the fertilizer contains N: 14.11%, P2O5：6.28%，K2O: 29.87, total nutrients: 50.26%, water-insoluble matter: < 0.01%, pH: 4.16, the fertilizer strength is 56.3N, and after the fertilizer is dissolved in water with the hardness of more than 800 ℃ according to a certain proportion, the water solution is clear without flocculation and precipitation. The fertilizer is piled up 20 layers in height, and no pulverization and no caking are generated within 6 months.
< example 3>
A full water-soluble nitro-particle water-soluble fertilizer adopts a drum granulation production process in a granulation method. The formula comprises the following components in parts by weight: 35 parts of ammonium nitrate, 39 parts of full-water-soluble potassium sulfate, 5 parts of potassium chloride, 9.8 parts of monopotassium phosphate, 22 parts of 73% monoammonium phosphate, 5 parts of ammonium sulfate, 3 parts of citric acid, 1.3 parts of magnesium sulfate, 0.7 part of manganese sulfate, 0.8 part of zinc sulfate, 0.6 part of boric acid, 0.7 part of alginic acid and 0.8 part of water-soluble anti-caking agent.
Ammonium nitrate solution is obtained from an ammonium nitrate device through two-stage concentration to about 95wt%, conveyed through a jacket heat-insulating pipeline, pumped into a drum granulator after being metered, sprayed into the drum granulator through a slurry sprayer, other powdery materials are metered according to a proportion and uniformly mixed and conveyed into the drum granulator, and ammonium nitrate molten liquid and the powdery materials are bonded into granules under the continuous rolling of the drum granulator. And (3) drying, cooling, screening, adding a water-soluble anti-caking agent and packaging the fertilizer granules from the rotary drum granulator to obtain the clear liquid type nitro granular water-soluble fertilizer. Through testing, the fertilizer contains N: 12.84%, P2O5：15.11%，K2O: 22.36%, total nutrients: 50.31%, water-insoluble matter: < 0.01%, pH: 4.56, the fertilizer strength is 45.2N, and after the fertilizer is dissolved in water with the hardness of more than 800 ℃ according to a certain proportion, the water solution is clear without flocculation and precipitation. The fertilizer is piled up 20 layers in height, and no pulverization and no caking are generated within 6 months.
Claims (7)
1. The full water-soluble nitro-particle water-soluble fertilizer is characterized by comprising the following raw materials: 73% of monoammonium phosphate, full water-soluble potassium sulfate, dipotassium hydrogen phosphate, potassium chloride, ammonium nitrate, production auxiliary materials, magnesium sulfate, zinc sulfate, manganese sulfate, boric acid, a synergist and a water-soluble anti-caking agent.
2. The all-water-soluble nitro-particle water-soluble fertilizer as claimed in claim 1, wherein the high-potassium formula fertilizer of the all-water-soluble nitro-particle water-soluble fertilizer is prepared from the following raw materials in parts by weight:
4-12 parts of 73% monoammonium phosphate
30-55 parts of full water-soluble potassium sulfate
5-20 parts of dipotassium phosphate
2-8 parts of potassium chloride
45-60 parts of ammonium nitrate
3-20 parts of production auxiliary materials
Magnesium sulfate 0.5-2 parts
0.2 to 1 portion of zinc sulfate
0.2-1 part of manganese sulfate
0.2 to 1 portion of boric acid
0.2 to 2 portions of synergist
0.5-1.5 parts of water-soluble anti-caking agent.
3. The all-water-soluble nitro-particle water-soluble fertilizer as claimed in claim 1, wherein the balanced formula of the all-water-soluble nitro-particle water-soluble fertilizer comprises the following raw materials in parts by weight:
15-35 parts of 73% monoammonium phosphate
20-35 parts of full water-soluble potassium sulfate
2-8 parts of potassium chloride
4-10 parts of dipotassium hydrogen phosphate
30-50 parts of ammonium nitrate
3-20 parts of production auxiliary materials
Magnesium sulfate 0.5-2 parts
0.2 to 1 portion of boric acid
0.2 to 1 portion of zinc sulfate
0.2-1 part of manganese sulfate
0.2 to 2 portions of synergist
0.5-1.5 parts of water-soluble anti-caking agent.
4. The fully water-soluble nitro-particle water-soluble fertilizer according to any one of claims 1 to 3, wherein the production auxiliary materials are one or more of solid sulfuric acid, citric acid, tartaric acid and concentrated phosphoric acid.
5. The fully water-soluble nitro-particle water-soluble fertilizer according to any one of claims 1 to 3, wherein the synergist is one or more of amino acids, polysaccharides, and alginic acids.
6. The preparation method of the full water-soluble nitro-particle water-soluble fertilizer as claimed in claim 1, wherein a high tower granulation method is used, comprising the following steps:
s1, preparing raw materials of each component according to the weight parts;
s2, conveying ammonium nitrate through a jacket heat-insulating pipeline, metering, conveying the ammonium nitrate into a melting tank on the tower, metering half of the total weight of 73% monoammonium phosphate, conveying the metered ammonium nitrate into the melting tank, and heating the melting tank by a steam coil at the temperature of 160 ℃ and 170 ℃; meanwhile, the boric acid, the zinc sulfate and the manganese sulfate which are mixed in proportion are metered and sent to a primary mixing tank, potassium chloride powder and the rest 73 percent of monoammonium phosphate are metered and then added into the primary mixing tank, and the temperature of the primary mixing tank is 160-165 ℃; the metered fully water-soluble potassium sulfate, dipotassium hydrogen phosphate, magnesium sulfate, synergist and production auxiliary materials enter a secondary mixing tank, and the temperature of the secondary mixing tank is 155-;
and S3, allowing the uniformly stirred slurry to flow out of the secondary mixing tank, passing through an emulsifier, granulating, cooling, screening, adding a water-soluble anti-caking agent, and packaging to obtain a finished product.
7. The preparation method of the full water-soluble nitro-particle water-soluble fertilizer as claimed in claim 1, wherein a drum granulation method in a granulation method is used, comprising the following steps:
t1, dissolving ammonium nitrate in water to prepare ammonium nitrate solution, metering and pumping into a rotary drum granulator, and spraying into the rotary drum granulator through a slurry sprayer;
t2, weighing the rest materials according to the proportion, uniformly mixing, conveying into a rotary drum granulator, and binding into fertilizer granules under the continuous rolling of the rotary drum granulator;
t3, drying, cooling and screening the fertilizer granules from the rotary drum granulator, adding a water-soluble anti-caking agent, and packaging to obtain the finished product.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113956107A (en) * | 2021-12-14 | 2022-01-21 | 新洋丰农业科技股份有限公司 | Preparation method of anti-caking high-tower full-water-soluble nitro compound fertilizer |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1772714A (en) * | 2005-10-11 | 2006-05-17 | 山东省农业科学院土壤肥料研究所 | Whole nutrient solid fertilizer for drip irrigation and its prepn |
| CN102417421A (en) * | 2011-09-09 | 2012-04-18 | 广东拉多美化肥有限公司 | Full water-soluble nitro compound fertilizer and preparation method thereof |
| CN111187110A (en) * | 2019-11-29 | 2020-05-22 | 新洋丰农业科技股份有限公司 | Clear liquid type urine-based particle water-soluble fertilizer and preparation method thereof |
-
2020
- 2020-11-26 CN CN202011351329.4A patent/CN112279725A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1772714A (en) * | 2005-10-11 | 2006-05-17 | 山东省农业科学院土壤肥料研究所 | Whole nutrient solid fertilizer for drip irrigation and its prepn |
| CN102417421A (en) * | 2011-09-09 | 2012-04-18 | 广东拉多美化肥有限公司 | Full water-soluble nitro compound fertilizer and preparation method thereof |
| CN111187110A (en) * | 2019-11-29 | 2020-05-22 | 新洋丰农业科技股份有限公司 | Clear liquid type urine-based particle water-soluble fertilizer and preparation method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113956107A (en) * | 2021-12-14 | 2022-01-21 | 新洋丰农业科技股份有限公司 | Preparation method of anti-caking high-tower full-water-soluble nitro compound fertilizer |
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