CN106831230A - A kind of two-layer coated water-retaining sustained-release fertilizer with sterilization and insect prevention evil performance and preparation method thereof - Google Patents
A kind of two-layer coated water-retaining sustained-release fertilizer with sterilization and insect prevention evil performance and preparation method thereof Download PDFInfo
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- CN106831230A CN106831230A CN201611152675.3A CN201611152675A CN106831230A CN 106831230 A CN106831230 A CN 106831230A CN 201611152675 A CN201611152675 A CN 201611152675A CN 106831230 A CN106831230 A CN 106831230A
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- humic acid
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- release fertilizer
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05B—PHOSPHATIC FERTILISERS
- C05B7/00—Fertilisers based essentially on alkali or ammonium orthophosphates
-
- 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
-
- 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
- C05G3/60—Biocides or preservatives, e.g. disinfectants, pesticides or herbicides; Pest repellants or attractants
-
- 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
-
- 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
- C05G5/30—Layered or coated, e.g. dust-preventing coatings
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F265/00—Macromolecular compounds obtained by polymerising monomers on to polymers of unsaturated monocarboxylic acids or derivatives thereof as defined in group C08F20/00
- C08F265/02—Macromolecular compounds obtained by polymerising monomers on to polymers of unsaturated monocarboxylic acids or derivatives thereof as defined in group C08F20/00 on to polymers of acids, salts or anhydrides
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F289/00—Macromolecular compounds obtained by polymerising monomers on to macromolecular compounds not provided for in groups C08F251/00 - C08F287/00
Abstract
The present invention discloses a kind of two-layer coated water-retaining sustained-release fertilizer that performance is done harm to sterilization and insect prevention, is made up of the raw material of following weight portion：Urea 55 70, ammonium phosphate 20 30, acrylic acid 30 45, wheat stalk 15 22, distillation appropriate amount of water, potassium hydroxide 27, sodium borohydride 0.5 2, humic acid 9 13, anhydrous sodium sulfite 5 11, formalin 49, ammonium persulfate 37, N, N ' methylene-bisacrylamide 13, sodium alginate 11 17,5% calcium chloride water is appropriate, paraffin 36, cobalt carbonate 0.2 0.6, zinc carbonate 26, medical stone powder 25,10% sodium hydroxide solution is appropriate.The present invention improves its water-soluble, utilization rate of raising urea efficiency and nitrogen by the modification to humic acid, improves the water absorbing and retaining properties and salt tolerance of slow release fertilizer product.
Description
Technical field
The present invention relates to slow release fertilizer technical field, and in particular to a kind of double-deck coating with sterilization and insect prevention evil performance is protected
Water slow-release fertilizer and preparation method thereof.
Background technology
Slow release fertilizer refers to the new-type fertilizer that can slow down or control nutrient releasing speed.Slow release fertilizer solubility in water
Small, nutrient discharges slowly in soil, reduces the loss of nutrient；Fertilizer efficiency is long-term, stabilization, can continuously be for
To plant in whole growth period to the demand of nutrient；It is adapted to different types of soil and plant, effectively keeps soil from packing together.Although
Slow-release controlled-release fertilizer has potential economic and social benefit well, and commercialization, but in large-scale application agriculturally still
It is restricted, only accounts for less than the 0.5% of world Fertilizer total flow, due to controlled-release material complex manufacturing, causes Controlled Release Fertilizer
Material holds at high price.
Xie Lihua, Liu Mingzhu are at it《The preparation of wheat stalk base novel sustained-controll-release fertiliser and its performance study》In one text,
With wheat stalk as base material, by glycerol polymerization and semi-intercrossing network technology, it is prepared for pretreatment wheat straw and gathers（Acrylic acid third
Acrylamide）PDDA semi-intercrossing network amphiprotic absorbent resin, the introducing of crops wheat stalk with
And NMA makees crosslinking agent and can improve the degradation property of high hydroscopic resin, with environment friendly, fertilizer is being improved
While material utilization rate, the secondary pollution to soil and environment can be avoided.
Humic acid is widely present in nature, is a kind of organic macromolecule compound, is organic substance in geophysics
The lower complicated organic molecule for being formed of effect, to maintaining the ecological balance to play an important role.It is of particular importance that it is to maintain
The important substance of soil texture, plays an important role for maintenance of soil fertility.Because plant can only absorb water is dissolved in the material of water,
Therefore water-soluble index is the extremely important index of agricultural supplie.For humic acid, water miscible meaning is, humic acid part
Small-molecule substance can be absorbed by plants, and humic acid is directly decided by that its is water-soluble to the synergistic effect of fertilizer and Effect of improving soil
The quality of property.
Therefore, the present invention improves its water solubility, by aqueous free radical polymerization by the modification to humic acid
With wheat rice straw-g- polyacrylic acid/humic acid suction high that pretreated stalk, acrylic acid copolymer form macromolecular network structure
Water-resin, improves the utilization rate of urea efficiency and nitrogen, and improves the water absorbing and retaining properties and salt tolerance of slow release fertilizer product.
The content of the invention
In view of the shortcomings of the prior art, delay the invention provides a kind of double-deck coating water conservation with sterilization and insect prevention evil performance
Release fertilizer and preparation method thereof.
A kind of two-layer coated water-retaining sustained-release fertilizer that performance is done harm to sterilization and insect prevention, is made up of the raw material of following weight portion：Urine
It is plain 55-70 parts, ammonium phosphate 20-30 parts, acrylic acid 30-45 parts, wheat stalk 15-22 parts, distill appropriate amount of water, potassium hydroxide 2-7
Part, sodium borohydride 0.5-2 parts, humic acid 9-13 parts, anhydrous sodium sulfite 5-11 parts, formalin 4-9 parts, ammonium persulfate 3-7
Part, N, N '-methylene-bisacrylamide 1-3 parts, sodium alginate 11-17 parts, 5% calcium chloride water is appropriate, paraffin 3-6 parts,
Cobalt carbonate 0.2-0.6 parts, zinc carbonate 2-6 parts, medical stone powder 2-5 parts, 10% sodium hydroxide solution is appropriate.
Comprise the following steps that：
（1）Stalk pretreatment：
By wheat stalk crushing treatment, the distilled water of 50-60 times of wheat stalk mass ratio is added, this suspension is positioned over 55-
In 70 DEG C of water-baths, filtered after 15-18 hours, screening is added containing in potassium hydroxide, the aqueous solution of sodium borohydride, at room temperature machine
Tool is stirred 2-4 hours, and by the filtering of above-mentioned suspension, screening ethanol is washed till filtrate in neutrality, finally by screening at 100-110 DEG C
Drying, it is standby；
（2）The sulfomethylation of humic acid：
Humic acid and distilled water are added in reaction bulb, adjust its pH value for 10-11, be warming up to 85-95 DEG C and be stirred continuously, made
Its dissolving；The solution that anhydrous sodium sulfite is made into 10-20% is weighed, formalin is added, insulation reaction 20-40 points at 45-55 DEG C
Clock, by the product above-mentioned reaction bulb containing humic acid solution of instillation, obtains sulfomethylation humic acid solution；
（3）The preparation of wheat rice straw-g- polyacrylic acid/humic acid high hydroscopic resin：
Weigh acrylic acid to be put into flask, then adjust pH value 5-6 with 10% sodium hydroxide solution in ice bath, be subsequently added step
Suddenly（2）Sulfomethylation humic acid solution and step（1）Stalk stirring mixing after pretreatment, supplements a small amount of deionized water, and stirring is equal
Ammonium persulfate, N, N '-methylene-bisacrylamide, under nitrogen protection, by 5 DEG C/min program warmings while stirring are added after even
To 60-80 DEG C, and constant temperature polymerisation 2-3 hours at this temperature, resulting polymers are dried to constant weight after shredding, size-reduced,
Sieving, obtains high hydroscopic resin particle, standby；
（4）The preparation of sodium alginate coated urea hydrogel：
Take in sodium alginate addition distilled water, stirred 45-65 minutes in there-necked flask under the conditions of 50-70 DEG C, until marine alga
Sour sodium all dissolves, and adds urea, ammonium phosphate, ultrasonic 30-50 minutes, when temperature is down to normal temperature condition, by the mixed solution
Drop in 5% calcium chloride water, particle is cross-linked to form rapidly, filter, dry, obtain a coated fertilizer gel micro-ball；
（5）It is scattered under cobalt carbonate ultrasound condition in the zinc carbonate aqueous solution, regulation pH is 7, thing is precipitated, by gained sediment
Be aged 20-24 hours in room temperature, absolute ethanol washing after sediment is filtered, in -30 DEG C of freeze-dryings, afterwards -45 DEG C,
13-20Pa freeze dryers are dehydrated, and the product after dehydration is calcined 2-3 hours through 500-700 DEG C, obtain Co-doped ZnO nanometer
Crystalline particle；
（6）Secondary coating treatment：
By step（4）The coated fertilizer gel micro-ball preheating for obtaining, 40-50 DEG C of preheating temperature sends into rotary drum coating machine,
By paraffin, step（5）Co-doped ZnO nanocrystalline particle is spread evenly across the surface of material of motion, then will by conveyer belt
Step（3）High hydroscopic resin particle is dispersed evenly to the surface of material in motion, is allowed to be bonded to surface of material, after cooling, i.e.,
Obtain fertiliser granulates product.
Compared with prior art, the present invention has advantages below：
（1）The present invention carry out sulfomethylation treatment by humic acid, by aqueous free radical polymerization with it is pretreated
Stalk, acrylic acid copolymer form the wheat rice straw-g- polyacrylic acid/humic acid high hydroscopic resin of macromolecular network structure, prepare
Resin not only water absorbent rate is higher, and Stability Analysis of Structures, for a long time water suction is not easy to decompose, with good water absorbing and retaining properties
Energy；The addition of wheat stalk effectively reduces slow release fertilizer cost, and the sulfonic acid group of good salt tolerance is introduced into rotten in the present invention
On phytate molecule, the water solubility of humic acid is improve, improve the access amount of humic acid, improve the water suction of slow release fertilizer product
Water-retaining property and salt tolerance.
（2）The present invention carries out a coating to nitrogens such as urea and processes using sodium alginate, afterwards using the suction high for preparing
Water-resin carries out secondary cladding treatment to a coated fertilizer, and the characteristic for the treatment of and high hydroscopic resin is coated by duplicature, makes
Product both has soil water sorption water conservation opsonic action, and decomposition rate of the urea in soil can be effectively suppressed again, can substantially change
The long-acting slow-release performance of the nitrogenous fertilizer such as kind urea, reduces volatilization and the leaching loss of nutrient, improves the utilization rate of urea efficiency and nitrogen,
And the coating film of present invention sustained release fertilizer product will not can be polluted in degraded in soil to soil environment.
（3）Combined with urea using medical stone powder in the present invention, played sterilizing disease-preventing insect pest effect, while cobalt, zinc nanometer
Crystalline particle slow mechanism dissolved can meet the various nutrition of plant growth needs to discharge cobalt, zinc micronutrient element, improve crop
Yield and quality.
Specific embodiment
A kind of two-layer coated water-retaining sustained-release fertilizer that performance is done harm to sterilization and insect prevention, is made up of the raw material of following weight portion：Urine
Element 65, ammonium phosphate 25, acrylic acid 35, wheat stalk 20 distills appropriate amount of water, potassium hydroxide 5, sodium borohydride 1, humic acid 11, nothing
Water sodium sulfite 9, formalin 7, ammonium persulfate 6, N, N '-methylene-bisacrylamide 2, sodium alginate 14,5% calcium chloride water
Appropriate solution, paraffin 5, cobalt carbonate 0.4, zinc carbonate 5, medical stone powder 4,10% sodium hydroxide solution is appropriate.
Comprise the following steps that：
（1）Stalk pretreatment：
By wheat stalk crushing treatment, the distilled water of 60 times of wheat stalk mass ratio is added, this suspension is positioned over 65 DEG C of water
In bath, filtered after 16 hours, screening is added containing in potassium hydroxide, the aqueous solution of sodium borohydride, mechanical agitation 3 is small at room temperature
When, by the filtering of above-mentioned suspension, screening ethanol is washed till filtrate in neutrality, and finally screening is dried at 105 DEG C, standby；
（2）The sulfomethylation of humic acid：
Humic acid and distilled water are added in reaction bulb, it is 11 to adjust its pH value, is warming up to 90 DEG C and is stirred continuously, and makes its molten
Solution；The solution that anhydrous sodium sulfite is made into 15% is weighed, formalin, insulation reaction 30 minutes at 50 DEG C, by product drop is added
Enter in the above-mentioned reaction bulb containing humic acid solution, obtain sulfomethylation humic acid solution；
（3）The preparation of wheat rice straw-g- polyacrylic acid/humic acid high hydroscopic resin：
Weigh acrylic acid to be put into flask, then adjust pH values 6 with 10% sodium hydroxide solution in ice bath, be subsequently added step
（2）Sulfomethylation humic acid solution and step（1）Stalk stirring mixing, supplements a small amount of deionized water after pretreatment, stirs
Afterwards add ammonium persulfate, N, N '-methylene-bisacrylamide, nitrogen protection under, by the warming while stirring of 5 DEG C/min programs extremely
70 DEG C, and constant temperature polymerisation 3 hours at this temperature, resulting polymers are dried to constant weight after shredding, size-reduced, sieving, are obtained
High hydroscopic resin particle, it is standby；
（4）The preparation of sodium alginate coated urea hydrogel：
Take in sodium alginate addition distilled water, stirred 55 minutes in there-necked flask under the conditions of 60 DEG C, until sodium alginate is complete
Portion is dissolved, and adds urea, ammonium phosphate, and the mixed solution when temperature is down to normal temperature condition, is dropped to 5% chlorine by ultrasound 40 minutes
Change in the calcium aqueous solution, particle is cross-linked to form rapidly, filter, dry, obtain a coated fertilizer gel micro-ball；
（5）It is scattered under cobalt carbonate ultrasound condition in the zinc carbonate aqueous solution, regulation pH is 7, thing is precipitated, by gained sediment
It is aged 24 hours in room temperature, absolute ethanol washing after sediment is filtered, in -30 DEG C of freeze-dryings, afterwards in -45 DEG C, 15Pa
Freeze dryer is dehydrated, and the product after dehydration is calcined 3 hours through 600 DEG C, obtains Co-doped ZnO nanocrystalline particle；
（6）Secondary coating treatment：
By step（4）The coated fertilizer gel micro-ball preheating for obtaining, 45 DEG C of preheating temperature sends into rotary drum coating machine, will
Paraffin, step（5）Co-doped ZnO nanocrystalline particle is spread evenly across the surface of material of motion, then will be walked by conveyer belt
Suddenly（3）High hydroscopic resin particle is dispersed evenly to the surface of material in motion, is allowed to be bonded to surface of material, after cooling, obtains final product
Fertiliser granulates product.
According to nitrogen leaching rate of the double-deck coated slow-release nitrogenous fertilizer of above-described embodiment preparation in water：
24h initial stages nutrient dissolved percentage is soaked in 25 DEG C of hydrostatic and is less than 15%, accumulation nutrient dissolved percentage is less than 80% within 28 days,
The theoretical sustained release phase is 42 days.
Claims (2)
1. it is a kind of with sterilization and insect prevention do harm to performance two-layer coated water-retaining sustained-release fertilizer, it is characterised in that by the original of following weight portion
Material composition：Urea 55-70 parts, ammonium phosphate 20-30 parts, acrylic acid 30-45 parts, wheat stalk 15-22 parts, distill appropriate amount of water, hydrogen
Potassium oxide 2-7 parts, sodium borohydride 0.5-2 parts, humic acid 9-13 parts, anhydrous sodium sulfite 5-11 parts, formalin 4-9 parts, mistake
Ammonium sulfate 3-7 parts, N, N '-methylene-bisacrylamide 1-3 parts, sodium alginate 11-17 parts, 5% calcium chloride water is appropriate,
Paraffin 3-6 parts, cobalt carbonate 0.2-0.6 parts, zinc carbonate 2-6 parts, medical stone powder 2-5 parts, 10% sodium hydroxide solution is appropriate.
2. according to claims 1 it is a kind of with sterilization and insect prevention evil performance two-layer coated water-retaining sustained-release fertilizer preparation side
Method, it is characterised in that comprise the following steps that：
（1）Rice straw is pre-processed：
By wheat stalk crushing treatment, the distilled water of 50-60 times of wheat stalk mass ratio is added, this suspension is positioned over 55-
In 70 DEG C of water-baths, filtered after 15-18 hours, screening is added containing in potassium hydroxide, the aqueous solution of sodium borohydride, at room temperature machine
Tool is stirred 2-4 hours, and by the filtering of above-mentioned suspension, screening ethanol is washed till filtrate in neutrality, finally by screening at 100-110 DEG C
Drying, it is standby；
（2）The sulfomethylation of humic acid：
Humic acid and distilled water are added in reaction bulb, its pH value about 10-11 is adjusted, 85-95 DEG C are warming up to and are stirred continuously,
Dissolve it；The solution that anhydrous sodium sulfite is made into 10-20% is weighed, formalin, insulation reaction 20-40 at 45-55 DEG C is added
Minute, by the product above-mentioned reaction bulb containing humic acid solution of instillation, obtain sulfomethylation humic acid solution；
（3）The preparation of wheat rice straw-g- polyacrylic acid/humic acid high hydroscopic resin：
Weigh acrylic acid to be put into flask, then adjust pH value 5-6 with 10% sodium hydroxide solution in ice bath, be subsequently added step
Suddenly（2）Sulfomethylation humic acid solution and step（1）Stalk stirring mixing after pretreatment, supplements a small amount of deionized water, and stirring is equal
Ammonium persulfate, N, N '-methylene-bisacrylamide, under nitrogen protection, by 5 DEG C/min program warmings while stirring are added after even
To 60-80 DEG C, and constant temperature polymerisation 2-3 hours at this temperature, resulting polymers are dried to constant weight after shredding, size-reduced,
Sieving, obtains high hydroscopic resin particle, standby；
（4）The preparation of sodium alginate coated urea hydrogel：
Take in sodium alginate addition distilled water, stirred 45-65 minutes in there-necked flask under the conditions of 50-70 DEG C, until marine alga
Sour sodium all dissolves, and adds urea, ammonium phosphate, medical stone powder, ultrasonic 30-50 minutes, when temperature is down to normal temperature condition, by this
Mixed solution is dropped in 5% calcium chloride water, and particle is cross-linked to form rapidly, filtering, is dried, and obtains a coated fertilizer
Gel micro-ball；
（5）It is scattered under cobalt carbonate ultrasound condition in the zinc carbonate aqueous solution, regulation pH is 7, thing is precipitated, by gained sediment
Be aged 20-24 hours in room temperature, absolute ethanol washing after sediment is filtered, in -30 DEG C of freeze-dryings, afterwards -45 DEG C,
13-20Pa freeze dryers are dehydrated, and the product after dehydration is calcined 2-3 hours through 500-700 DEG C, obtain Co-doped ZnO nanometer
Crystalline particle；
（6）Secondary coating treatment：
By step（4）The coated fertilizer gel micro-ball preheating for obtaining, 40-50 DEG C of preheating temperature sends into rotary drum coating machine,
By paraffin, step（5）Co-doped ZnO nanocrystalline particle is spread evenly across the surface of material of motion, then will by conveyer belt
Step（3）High hydroscopic resin particle is dispersed evenly to the surface of material in motion, is allowed to be bonded to surface of material, after cooling, i.e.,
Obtain fertiliser granulates product.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611152675.3A CN106831230A (en) | 2016-12-14 | 2016-12-14 | A kind of two-layer coated water-retaining sustained-release fertilizer with sterilization and insect prevention evil performance and preparation method thereof |
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|---|---|---|---|
| CN201611152675.3A CN106831230A (en) | 2016-12-14 | 2016-12-14 | A kind of two-layer coated water-retaining sustained-release fertilizer with sterilization and insect prevention evil performance and preparation method thereof |
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| CN106831230A true CN106831230A (en) | 2017-06-13 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107567927A (en) * | 2017-09-29 | 2018-01-12 | 颍上庆丰农牧发展有限公司 | A kind of implantation methods of increasing of quality and production Kiwi berry |
| CN108046905A (en) * | 2017-12-18 | 2018-05-18 | 天长市天兴园林绿化工程有限公司 | A kind of willow for improveing soil nutrition equilibrium slow-release fertilizer |
| CN109627090A (en) * | 2019-01-04 | 2019-04-16 | 深圳市芭田生态工程股份有限公司 | Slow-release nitrogen fertilizer and preparation method thereof containing ammoniated lignin |
| EP3911621A4 (en) * | 2019-01-17 | 2022-09-21 | The Mosaic Company | Hydrophobic coatings to improve the physical quality parameters of fertilizers |
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| CN104072686A (en) * | 2014-06-30 | 2014-10-01 | 山东大学 | Preparation method of straw-based super absorbent resin with nitrogen phosphorus fertilizer slow-release function |
| CN105347916A (en) * | 2015-10-30 | 2016-02-24 | 全椒县琪悦家庭农场 | Sterilization soil-improvement slow-release composite fertilizer and preparation method thereof |
| CN105348004A (en) * | 2015-11-17 | 2016-02-24 | 宁国市汉唐盛世农林开发有限公司 | Humic-acid-containing modified-starch-coated slow-release fertilizer and preparation method thereof |
| CN105418252A (en) * | 2015-12-17 | 2016-03-23 | 叶勇 | Multi-functional controlled availability fertilizer |
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2016
- 2016-12-14 CN CN201611152675.3A patent/CN106831230A/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104072686A (en) * | 2014-06-30 | 2014-10-01 | 山东大学 | Preparation method of straw-based super absorbent resin with nitrogen phosphorus fertilizer slow-release function |
| CN105347916A (en) * | 2015-10-30 | 2016-02-24 | 全椒县琪悦家庭农场 | Sterilization soil-improvement slow-release composite fertilizer and preparation method thereof |
| CN105348004A (en) * | 2015-11-17 | 2016-02-24 | 宁国市汉唐盛世农林开发有限公司 | Humic-acid-containing modified-starch-coated slow-release fertilizer and preparation method thereof |
| CN105418252A (en) * | 2015-12-17 | 2016-03-23 | 叶勇 | Multi-functional controlled availability fertilizer |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107567927A (en) * | 2017-09-29 | 2018-01-12 | 颍上庆丰农牧发展有限公司 | A kind of implantation methods of increasing of quality and production Kiwi berry |
| CN108046905A (en) * | 2017-12-18 | 2018-05-18 | 天长市天兴园林绿化工程有限公司 | A kind of willow for improveing soil nutrition equilibrium slow-release fertilizer |
| CN109627090A (en) * | 2019-01-04 | 2019-04-16 | 深圳市芭田生态工程股份有限公司 | Slow-release nitrogen fertilizer and preparation method thereof containing ammoniated lignin |
| EP3911621A4 (en) * | 2019-01-17 | 2022-09-21 | The Mosaic Company | Hydrophobic coatings to improve the physical quality parameters of fertilizers |
| US11814329B2 (en) | 2019-01-17 | 2023-11-14 | The Mosaic Company | Hydrophobic coatings to improve the physical quality parameters of fertilizers |
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Application publication date: 20170613 |