CN101353281B - Functional urea and preparation thereof - Google Patents
Functional urea and preparation thereof Download PDFInfo
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- CN101353281B CN101353281B CN200810195717A CN200810195717A CN101353281B CN 101353281 B CN101353281 B CN 101353281B CN 200810195717 A CN200810195717 A CN 200810195717A CN 200810195717 A CN200810195717 A CN 200810195717A CN 101353281 B CN101353281 B CN 101353281B
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- urea
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- trace element
- amino acid
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- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 title claims abstract description 66
- 239000004202 carbamide Substances 0.000 title claims abstract description 66
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- 239000007788 liquid Substances 0.000 claims abstract description 36
- 239000003337 fertilizer Substances 0.000 claims abstract description 23
- 150000001413 amino acids Chemical class 0.000 claims abstract description 18
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 17
- 239000005648 plant growth regulator Substances 0.000 claims abstract description 13
- 238000005469 granulation Methods 0.000 claims abstract description 4
- 230000003179 granulation Effects 0.000 claims abstract description 4
- 239000000203 mixture Substances 0.000 claims description 28
- 239000011573 trace mineral Substances 0.000 claims description 23
- 235000013619 trace mineral Nutrition 0.000 claims description 23
- 235000013877 carbamide Nutrition 0.000 claims description 19
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 15
- 229910052708 sodium Inorganic materials 0.000 claims description 15
- 239000011734 sodium Substances 0.000 claims description 15
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 12
- 235000018660 ammonium molybdate Nutrition 0.000 claims description 10
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 claims description 10
- 239000004327 boric acid Substances 0.000 claims description 10
- 239000002131 composite material Substances 0.000 claims description 10
- 229910000365 copper sulfate Inorganic materials 0.000 claims description 10
- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical compound [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 claims description 10
- NWONKYPBYAMBJT-UHFFFAOYSA-L zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 claims description 10
- 229910000368 zinc sulfate Inorganic materials 0.000 claims description 10
- 229960001763 zinc sulfate Drugs 0.000 claims description 10
- 239000000843 powder Substances 0.000 claims description 9
- 229910021536 Zeolite Inorganic materials 0.000 claims description 8
- APUPEJJSWDHEBO-UHFFFAOYSA-P ammonium molybdate Chemical compound [NH4+].[NH4+].[O-][Mo]([O-])(=O)=O APUPEJJSWDHEBO-UHFFFAOYSA-P 0.000 claims description 8
- 229940010552 ammonium molybdate Drugs 0.000 claims description 8
- 239000011609 ammonium molybdate Substances 0.000 claims description 8
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims description 8
- 239000008187 granular material Substances 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 8
- 239000000047 product Substances 0.000 claims description 8
- 239000010457 zeolite Substances 0.000 claims description 8
- 230000008569 process Effects 0.000 claims description 7
- 239000011248 coating agent Substances 0.000 claims description 6
- 238000000576 coating method Methods 0.000 claims description 6
- 229910052757 nitrogen Inorganic materials 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims description 5
- 239000012467 final product Substances 0.000 claims description 4
- 238000012856 packing Methods 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 4
- 150000001875 compounds Chemical class 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 239000007921 spray Substances 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 2
- 239000007787 solid Substances 0.000 claims description 2
- 239000006200 vaporizer Substances 0.000 claims description 2
- 239000011701 zinc Substances 0.000 claims description 2
- 150000003672 ureas Chemical class 0.000 claims 1
- 239000002689 soil Substances 0.000 abstract description 8
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 239000005556 hormone Substances 0.000 abstract description 2
- 229940088597 hormone Drugs 0.000 abstract description 2
- 239000000463 material Substances 0.000 abstract 2
- 230000002708 enhancing effect Effects 0.000 abstract 1
- 230000005923 long-lasting effect Effects 0.000 abstract 1
- 235000015816 nutrient absorption Nutrition 0.000 abstract 1
- 230000001737 promoting effect Effects 0.000 abstract 1
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 231100000167 toxic agent Toxicity 0.000 abstract 1
- 239000003440 toxic substance Substances 0.000 abstract 1
- 239000000618 nitrogen fertilizer Substances 0.000 description 5
- 241000196324 Embryophyta Species 0.000 description 3
- 238000013019 agitation Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 210000002700 urine Anatomy 0.000 description 3
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000007710 freezing Methods 0.000 description 2
- 230000008014 freezing Effects 0.000 description 2
- 230000012010 growth Effects 0.000 description 2
- 230000014075 nitrogen utilization Effects 0.000 description 2
- 235000016709 nutrition Nutrition 0.000 description 2
- 230000035764 nutrition Effects 0.000 description 2
- 231100000572 poisoning Toxicity 0.000 description 2
- 230000000607 poisoning effect Effects 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 241000282326 Felis catus Species 0.000 description 1
- 241000233866 Fungi Species 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 235000012538 ammonium bicarbonate Nutrition 0.000 description 1
- 235000019270 ammonium chloride Nutrition 0.000 description 1
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 description 1
- 229910052921 ammonium sulfate Inorganic materials 0.000 description 1
- 235000011130 ammonium sulphate Nutrition 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000001784 detoxification Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 210000002615 epidermis Anatomy 0.000 description 1
- 238000009313 farming Methods 0.000 description 1
- 210000003608 fece Anatomy 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000010871 livestock manure Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- -1 metals ion Chemical class 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 235000020245 plant milk Nutrition 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 239000002680 soil gas Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 235000013311 vegetables Nutrition 0.000 description 1
- 238000009333 weeding Methods 0.000 description 1
Images
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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- Fertilizers (AREA)
Abstract
The invention discloses a functional urea and a preparation method thereof. The functional urea is made by mixing and granulating common urea, various amino acid concentrated solutions, a plant growth regulator, microelements and a biological promoter. One of the preparation methods is that the materials are heated to the temperature of 98 DEG C by a pressure pump with a flowmeter in a two-stage normal temperature and normal pressure evaporator during the production process of the urea, the materials are quantitatively and continuously added in proportion, melted and combined, and granulated in a urea granulation tower to obtain a product, the product obtained is coated with a liquid anti-caking agent, cooled and packed, therefore, the functional urea is obtained. The functional urea has the advantages of no hormone, no toxicant and no harmful matter, little dosage, fast action, stable fertilizer efficiency and long-lasting effect. Compared with the conventional urea, the dosage of the functional urea can be reduced by 40-50% (10Kg of base fertilizer and 5Kg of additional fertilizer per mu); meanwhile, the functional urea has the functions of regulating PH value of soil, promoting nutrient absorption of crops, enhancing crop yield, improving crop quality, saving energy sources, protecting environment, as well as saving cost and increasing incomes for farmers.
Description
Technical field
The present invention relates to a kind of fertilizer, specifically is a kind of functional urea and preparation method thereof.
Background technology
China's peasant habit is used traditional common nitrogenous fertilizer; Topdress like bicarbonate of ammonia, urea, ammonium sulfate, ammonium chloride; Owing to traditional its characteristics of chemical fertilizer of simple substance are exactly that consumption is many, loss is many, volatilization is fast, utilization ratio is low; Not only cause the low repayment of high investment, the more important thing is and cause quality of agricultural product to descend gradually that the nutrient that volatilization is run off causes the wasting of resources, environmental pollution to the peasant.
Existing various slow-release nitrogen fertilizer adopts coating, packing technology mostly, and aftereffect is very good, and it is difficult to satisfy the crop growth growth needs in earlier stage.
Summary of the invention
The purpose of this invention is to provide the high nitrogenous fertilizer new variety of input-output rate---a kind of functional urea that meets China's farming feelings, have quick-acting, slow, long-acting; Regulate soil acidity or alkalinity, promote the nutrition of farm crop rapid absorption, improve crop anti-adversity; Remove the murder by poisoning of field weeding agent, the murder by poisoning of metals ion suppresses soil fungi and unwanted bacteria; Promote that soil microorganisms breeds fast, improve the soil Gas permeability, make soil ability sustainable utilization.Reduce fertilizer amount, improve utilization rate of fertilizer, for peasant's abridged edition increases income.
The objective of the invention is to realize through following scheme:
A kind of functional urea is characterized in that by weight components formulated:
Urea or urea liquid 860～1000
Amino acid liquid concentrator 2～10
Plant-growth regulator (DA-6) 0.3～0.5
Biological promotor (synergy sodium) 0.3～0.5
Zeolite powder 0～100
Trace element mixture 3～30
Liquid composite fertilizer anti-hard caking agent 1～2
Wherein, each composition weight proportioning of described trace element mixture is:
Zinc sulfate 40～50
Copper sulfate 20～30
Ammonium molybdate 10～20
Boric acid 20～30.
Described a kind of functional urea is characterized in that by weight components formulated:
Urea liquid 1000
Amino acid liquid concentrator 2
Plant-growth regulator (DA-6) 0.5
Biological promotor (synergy sodium) 0.5
Trace element mixture 3
Liquid composite fertilizer anti-hard caking agent 1～2
Each composition weight proportioning of described trace element mixture is:
Zinc sulfate 1.2
Copper sulfate 0.6
Ammonium molybdate 0.3
Boric acid 0.9.
Make product through above-mentioned prescription, total nitrogen content >=46%, nitrogen utilization efficiency improve 10～15 percentage points, and fertilizer efficiency speed then took effect in three days, and is long then reach 90～100 days, reduces by 40～50% consumptions, increases production about 10%.
Said a kind of functional urea is characterized in that by weight components formulated:
Urea 860
Amino acid liquid concentrator 10
Zeolite powder 100
Plant-growth regulator (DA-6) 0.3
Biological promotor (synergy sodium) 0.3
Trace element mixture 30
Liquid composite fertilizer anti-hard caking agent 1～2
Each composition weight proportioning of described trace element mixture is:
Zinc sulfate 15
Ammonium molybdate 3
Through the product that above-mentioned prescription is processed, total nitrogen content >=40%, trace element >=3%, nitrogen utilization efficiency improve 10～15%, and fertilizer efficiency speed then took effect in three days, and is long then reach more than 100 days, reduces by 40% consumption, increases production about 10%.
The urea that the present invention adopts is meant the finished product solid urea, total N content 46.4%; Urea liquid is meant concentration 95%, temperature 132 ℃, total N content >=46.4%; Amino acid liquid concentrator concentration >=98%; Plant-growth regulator (DA-6) concentration >=98%; Biological promotor (synergy sodium) concentration >=98%; Zinc sulfate contains Zn >=35%; Copper sulfate contains Cu >=24%; Ammonium molybdate contains Mo >=50%; Boric acid contains B >=17%; The liquid composite fertilizer anti-hard caking agent is the oils macromolecular compound.
A kind of preparation method of functional urea; It is characterized in that comprising the following steps: producing in the urea process, need not change any technology, only need in two sections these workshop sections of normal temperature and pressure vaporizer in the chemical plant; Be heated to 98 ℃ amino acid liquid concentrator with (DA-6), (synergy sodium); Trace element mixture together injects with the pump that has under meter by formula rate, and the final product that comes out through prilling tower again wraps through anti-hard caking agent coating postcooling dress, promptly becomes the functional urea of total nitrogen content >=46%.
The preparation method of described a kind of functional urea; It is characterized in that comprising the following steps: the finished urea particle is sieved; Get screen overflow and heat to about 85～95 ℃, the amino acid liquid concentrator is heated to 90 ℃, on the process urea granules of heating, (make it that slightly acidic reaction take place) with the pump pressurization spray that has under meter; Then zeolite powder, trace element, plant-growth regulator (DA-6), biological promotor (synergy sodium) are mixed and is coated on the urea granules with viscosity; Further granulation, coating liquid compound fertilizer anticaking agent postcooling, packing functional urea.
With existing compared with techniques, product adaptation of the present invention is practiced thrift nitrogenous fertilizer 40～50% in various soil, weather, farm crop, not only can make base manure but also can topdress, and uses very convenient.Do not contain any hormone, nontoxic.The structure of improving the soil promotes crop absorption nutrition, improves resistance, has function of detoxification.Improve utilization rate of fertilizer, save energy, the protection environment is for peasant's abridged edition increases income.Product particle of the present invention is big, good evenness, do not lump, and adapts to mechanized such as long-distance transport, long-term storage and aircraft.
Description of drawings
Fig. 1 is a kind of process flow sheet of the present invention.
Fig. 2 is an another kind of process flow sheet of the present invention.
Embodiment
Embodiment 1:
The composition weight prescription of present embodiment is:
N46.4 urine 1000 trace element mixtures 3
98% amino acid liquid concentrator, 2 liquid composite fertilizer anti-hard caking agents 1～2
98% plant-growth regulator (DA-6) 0.5
98% biological promotor (synergy sodium) 0.5
The weight proportion of trace element mixture is following:
Zinc sulfate 1.2 ammonium molybdates 0.3
Copper sulfate 0.6 boric acid 0.9
The preparation method:
Produce the flash evaporator workshop section in the urea process in the chemical plant; Newly-increased one is mixed agitation vat, 1 under meter, 1 topping-up pump; Above-mentioned amino acid liquid concentrator, (DA-6), (synergy sodium), trace element are heated to 95 ℃ by agitation vat through metering, use computingmachine setting program dominant discharge in proportion by under meter again, by topping-up pump above-mentioned fused solution is injected in the flash evaporator again and carry out hybrid reaction; Pass through the urea prilling tower sprinkling pelleting again; Be drawn into freezing air with the cat head pump bowl and once cool off, the urine drop runs into freezing air and promptly forms particle, in scoop at the bottom of the tower, obtains to be coated with last layer liquid composite fertilizer anti-hard caking agent again behind the final product; Carry out the secondary mechanical cooling again, reach the functional urea that normal room temperature can be packed becomes total nitrogen >=46%.
Embodiment 2:
The composition weight prescription of present embodiment is:
N46.4 urea 860 trace element mixtures 30
98% amino acid liquid concentrator, 10 zeolite powders 100
98% plant-growth regulator (DA-6), 0.3 liquid composite fertilizer anti-hard caking agent 1～2
98% biological promotor (synergy sodium) 0.3
The weight proportion of trace element mixture is:
Zinc sulfate 15 ammonium molybdates 3
The preparation method:
Urea granules is sieved, get screen overflow (irregular granule, powder are with using it for anything else), with being steam heated to 85-90 ℃; With the amino acid liquid concentrator at agitation vat internal heating to 90 ℃;, on the urea granules that the pressurization spray is being heated under the control of computingmachine, urea is constantly stirred with the pressure pump that has under meter, make it produce the slightly acidic reaction by the power of rotary drum granulator; Urea granules epidermis generation viscosity; Simultaneously zeolite powder, trace element, (DA-6), (synergy sodium) are mixed, continuously send into tablets press, carry out granulation with the urea of viscosity through computer-controlled helical screw feeder; Bag coating liquid compound fertilizer anticaking agent, cooling back packing promptly becomes the functional urea of total nitrogen content >=40%.
Functional urea is through showing that every mu of amount ratio common urea reduces by 50% consumption, raising the output 5～8% in potted plant Bioexperiment on the vegetables and the field simultaneous test on paddy rice; Reduce 40% consumption raising the output 10～12%; Be every mu of common urea base amount of application 20kg, functions of use urine is only used 10kg; The every mu of common urea consumption 10kg that topdresses, and functional urea only gets final product with 5kg.Fully show that functions of use urea can reduce nitrogen fertilizer amount significantly, thereby economize on resources, protect environment, improve Soil structure and quality of agricultural product.The amino acid liquid concentrator is the equal amount of mixture of plant milk extract and hair extract.
Claims (6)
1. functional urea is characterized in that by following component formulated by weight proportion:
Urea or urea liquid 860～1000
Amino acid liquid concentrator 2～10
Plant-growth regulator DA-6 0.3～0.5
Biological promotor synergy sodium 0.3～0.5
Zeolite powder 0～100
Trace element mixture 3～30
Liquid composite fertilizer anti-hard caking agent 1～2
Wherein, each composition weight proportioning of described trace element mixture is:
Zinc sulfate 40～50
Copper sulfate 20～30
Ammonium molybdate 10～20
Boric acid 20～30.
2. a kind of functional urea according to claim 1 is characterized in that by following component formulated by weight proportion:
Urea liquid 1000
Amino acid liquid concentrator 2
Plant-growth regulator DA-6 0.5
Biological promotor synergy sodium 0.5
Trace element mixture 3
Liquid composite fertilizer anti-hard caking agent 1～2
Each composition weight proportioning of described trace element mixture is:
Zinc sulfate 1.2
Copper sulfate 0.6
Ammonium molybdate 0.3
Boric acid 0.9.
3. to state 1 said a kind of functional urea according to right, it is characterized in that by following component formulated by weight proportion:
Urea 860
Amino acid liquid concentrator 10
Zeolite powder 100
Plant-growth regulator DA-6 0.3
Biological promotor synergy sodium 0.3
Trace element mixture 30
Liquid composite fertilizer anti-hard caking agent 1～2
Each composition weight proportioning of described trace element mixture is:
Zinc sulfate 15
Copper sulfate 6
Ammonium molybdate 3
Boric acid 6.
4. a kind of functional urea according to claim 1 is characterized in that urea is meant the finished product solid urea, total N content 46.4%; Amino acid liquid concentrator concentration >=98%; Plant-growth regulator DA-6 concentration >=98%; Biological promotor synergy na concn >=98%; Zinc sulfate contains Zn >=35%; Copper sulfate contains Cu >=24%; Ammonium molybdate contains Mo >=50%; Boric acid contains B >=17%.
5. the preparation method of a kind of functional urea according to claim 1 and 2; It is characterized in that comprising the following steps: producing in the urea process in the chemical plant; In two sections these workshop sections of normal temperature and pressure vaporizer, with amino acid liquid concentrator and the DA-6, the synergy sodium that are heated to 98 ℃, trace element mixture together injects with the pump that has under meter by formula rate; The final product that comes out through prilling tower again wraps through anti-hard caking agent coating postcooling dress, promptly becomes the functional urea of total nitrogen content >=46%.
6. according to the preparation method of claim 1 or 3 described a kind of functional ureas; It is characterized in that comprising the following steps: the finished urea particle is sieved; Get screen overflow and heat to about 85～95 ℃, the amino acid liquid concentrator is heated to 90 ℃, spray on the process urea granules of heating with the pump pressurization that has under meter; Then zeolite powder, trace element mixture, plant-growth regulator DA-6, biological promotor synergy sodium are mixed and is coated on the urea granules with viscosity; Further granulation, coating liquid compound fertilizer anticaking agent postcooling, packing functional urea.
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| CN200810195717A CN101353281B (en) | 2008-08-28 | 2008-08-28 | Functional urea and preparation thereof |
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| CN200810195717A CN101353281B (en) | 2008-08-28 | 2008-08-28 | Functional urea and preparation thereof |
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| CN101353281B true CN101353281B (en) | 2012-10-10 |
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Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101538182B (en) * | 2009-04-15 | 2012-12-12 | 吴成祥 | Functional compound fertilizer, production device and preparation method thereof |
| CN101628839B (en) * | 2009-07-30 | 2013-08-14 | 吴成祥 | Synergist of functional fertilizer and preparation method thereof |
| CN102160511B (en) * | 2011-03-15 | 2013-06-05 | 吴成祥 | Novel cultivation, precise fertilization and comprehensive cultivation method for single cropping rice |
| CN102838420B (en) * | 2012-09-27 | 2013-12-25 | 东北农业大学 | Selenium-rich slow release coated urea |
| CN103964933A (en) * | 2013-01-29 | 2014-08-06 | 大庆昆仓石化产品销售有限公司 | Technical method for urea synergistic agent |
| CN103539568B (en) * | 2013-10-31 | 2015-06-17 | 河南中威高科技化工有限公司 | Nutrient synergistic anti-caking compound fertilizer and preparation method thereof |
| CN105367175A (en) * | 2015-12-02 | 2016-03-02 | 锦西天然气化工有限责任公司 | Production process for zinc-containing urea |
| CN107082716B (en) * | 2017-03-22 | 2021-01-08 | 深圳市芭田生态工程股份有限公司 | Value-added urea capable of activating soil and preparation method thereof |
| CN111574268A (en) * | 2019-02-15 | 2020-08-25 | 王国芳 | Simple and easy new method for producing compound (mixed) fertilizer directly by urea device |
| CN113979807A (en) * | 2021-11-28 | 2022-01-28 | 成都金禄福生物科技有限公司 | Urea-based compound fertilizer containing brown algae oligosaccharide and trace elements and preparation method thereof |
| CN114467958B (en) * | 2022-01-05 | 2023-06-02 | 海南大学 | Compound agent and method for plant growth regulating substance to reduce pomelo juice cell granulation |
| CN115894135A (en) * | 2022-12-24 | 2023-04-04 | 江苏可兰素环保科技有限公司 | Preparation method of urea granules |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1259505A (en) * | 1998-11-09 | 2000-07-12 | 贺乙峰 | Plant nutriment regulator |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1259505A (en) * | 1998-11-09 | 2000-07-12 | 贺乙峰 | Plant nutriment regulator |
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