CN108484256A - A kind of coated fertilizer and its preparation method and application - Google Patents
A kind of coated fertilizer and its preparation method and application Download PDFInfo
- Publication number
- CN108484256A CN108484256A CN201810273762.7A CN201810273762A CN108484256A CN 108484256 A CN108484256 A CN 108484256A CN 201810273762 A CN201810273762 A CN 201810273762A CN 108484256 A CN108484256 A CN 108484256A
- Authority
- CN
- China
- Prior art keywords
- coated
- fertilizer
- parts
- added
- film
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05B—PHOSPHATIC FERTILISERS
- C05B7/00—Fertilisers based essentially on alkali or ammonium orthophosphates
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05C—NITROGENOUS FERTILISERS
- C05C9/00—Fertilisers containing urea or urea compounds
- C05C9/005—Post-treatment
-
- 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
- C05G3/80—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
- C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
- C05G3/90—Mixtures of one or more fertilisers with additives not having a specially fertilising activity for affecting the nitrification of ammonium compounds or urea in the soil
Abstract
The invention discloses a kind of coated fertilizers, in parts by weight, including following components：40 70 parts of starch from sweet potato；10 30 parts of wheat-straw powder；0.01 10 parts of humic acid；0.5 5 parts of crosslinking agent.The coated fertilizer of the present invention has many advantages, such as that long release time, environmental protection, low cost, raw material are easy to get.
Description
Technical field
The present invention relates to technical field of polymer materials, more particularly to a kind of coated fertilizer and preparation method thereof and answer
With.
Background technology
In modern agriculture, chemical fertilizer extensive use, but cause it to fail due to loss of chemical fertilizer, volatilization etc.
It is absorbed and utilized entirely by crops, causes a large amount of wastes and environmental pollution of manure resources.Therefore, the utilization of fertilizer is improved
Rate, and reduce and a urgent problem to be solved in fertilizer field research is had become to the pollution of environment.From the 1960s
Mid-term begins, and the developed countries such as America and Europe, Japan, which begin one's study, is imitated by modes such as fertilizer slow release/controlled releases to improve utilizing for fertilizer
Rate, related fertilizer product are also come out one after another.But there are still fertilizer nutrient rates of release and crop absorption to support in use
Point synchronizing poor leads to problems such as fertilizer utilization efficiency relatively low.Therefore novel slowly/controlled releasing fertilizer is developed into for hot spot, makes every effort to
From the characteristic for changing chemical fertilizer itself, balances and coordinate fertilizer nutrient rate of release, soil nutrient supply and crop nutrition content and inhale
Rate is received, and then greatly improves the utilization ratio of fertilizer.The slow/controlled release of fertilizer realizes one using that can reduce fertilizer application frequency simultaneously
Secondary property fertilising, reduces production cost, while mitigating repeatedly fertilising pressure caused by environment, convenient in China's agricultural decentralized management
Under conditions of promoted the use of.
China is large agricultural country, and fertilizer amount is huge.To slowly/controlled releasing fertilizer is widely applied at home, it is necessary to grind
Field crop can be used for by sending out, and cheap slowly/controlled releasing fertilizer.Among existing research, by with hydrophilic polymer
For object as dispersate, water is dispersant, and the preparation of slow/controlled release coated fertilizer, production cost are realized by polymer emulsion coating
It is relatively low, convenient for producing in enormous quantities.Using starch, polyvinyl alcohol as the polymer capsule material of representative be even more it is natural with it, cheap,
The advantages that degradable, receives the extensive favor of researchers.Xue Hailong et al.（The such as Xue Hailong, Xu Wennian, Liu great Xiang are several poly-
The development of condensation material coated carbamide and study on evaluation way [J] Chinese agriculture science and technology Leaders, 2017,19 (4):92-99.）To form sediment
Powder, polyvinyl alcohol are base material, and Inorganic nonmetal mineral is that modified material is prepared for coated carbamide material, the results showed that modified
The addition of agent can optimize the water resistance and slow release characteristic of coated fertilizer, and it is that plant growth absorbs profit to ensure fertilizer nutrient preferably
With.Nowadays crop straw burning becomes a critically important factor of pollution air, can fully recycle wheat-straw and make coating
Material becomes a kind of method of double environmental protection.
Invention content
The purpose of the present invention is to provide the coated fertilizers that a kind of length of release time, low cost, environmental protection, raw material are easy to get.This
Another of invention is designed to provide application process of the coated fertilizer on preparing film-coated controlled release fertilizer.
The present invention is achieved by the following technical solutions：
A kind of coated fertilizer, in parts by weight, including following components：
40-70 parts of starch from sweet potato；
10-30 parts of wheat-straw powder；
0.01-10 parts of humic acid；
0.5-5 parts of crosslinking agent.
The crosslinking agent is selected from N, and at least one in N '-methylene-bisacrylamides, glutaraldehyde, ethanedioic acid, glycerine
Kind；Preferably, N, N '-methylene-bisacrylamides and glutaraldehyde compounding or N, N '-methylene-bisacrylamide and third are selected from
Triol compounds；It is furthermore preferred that it is selected from N, N '-methylene-bisacrylamides and glutaraldehyde compounding.
Further, in parts by weight, further include 0-15 parts of polyvinyl alcohol.
The preparation method of the coated fertilizer, includes the following steps：
A）According to proportioning, 200-1300 parts of water, starch from sweet potato, wheat-straw powder are first added in a kettle, after stirring evenly, is added
Humic acid is uniformly mixed, and reactor temperature setting is gelatinized to 50-80 DEG C；
B）Crosslinking agent is added, is reacted 3-4 hours at 85-105 DEG C, brings it about cross-linking reaction；
C）Coated fertilizer aqueous dispersions are made in stirring, cooling discharging；
D）Coated fertilizer aqueous dispersions are sprayed on the frosted glass of 65-100 DEG C of temperature or fertiliser granulates surface, after drying and forming-film
As coated fertilizer.
Further, what is be added together with humic acid in the step A further includes 0-15 parts of polyvinyl alcohol.
The application of the coated fertilizer, is used to prepare film-coated controlled release fertilizer；The film-coated controlled release fertilizer is fertilizer
Expect particle one layer of coated fertilizer of outer cladding.
The preparation method of the film-coated controlled release fertilizer is：According to proportioning, 200-1300 parts are first added in a kettle
Water, starch from sweet potato, wheat-straw powder after stirring evenly, are added humic acid, are uniformly mixed, reactor temperature setting to 50-
80 DEG C of gelatinizations；Crosslinking agent is added, is reacted 3-4 hours at 85-105 DEG C, brings it about cross-linking reaction；Stirring, cooling discharging,
Coated fertilizer aqueous dispersions are made；Preferably, what is be added together with humic acid further includes 0-15 parts of polyvinyl alcohol；In boiling type
Or in rotary drum fluid bed, the coated fertilizer aqueous dispersions are coated to fertiliser granulates surface, water quilt by way of spraying
It steams, film-coated controlled release fertilizer is made, wherein 65-100 DEG C of fluidized-bed temperature, spraying rate is 4-8g/ (min*kg fertilizer
Grain)；Preferably, spraying rate is 5-7g/ (min*kg fertiliser granulates).
The weight ratio that the coated fertilizer accounts for film-coated controlled release fertilizer is 5-25%.
The fertiliser granulates are selected from least one of urea granules, ammonium phosphate granules, compound fertilizer granule；Described
The average grain diameter of film-coated controlled release fertilizer is 1.5-3.5mm.
The present invention has the advantages that：
The coated fertilizer of the present invention is primary raw material using starch from sweet potato and wheat-straw powder, cheap, and is largely used small
Straw is also avoided that air pollution caused by due to seasonality burns wheat-straw, and environmental protection is practical, the case where being added without polyvinyl alcohol
It is lower to can reach 60 days nutrient-lapsed times；The coated fertilizer of the present invention can reduce starch from sweet potato and small by the way that crosslinking agent is added
The quantity of hydrophilic radical in straw powder, the seepage of water for effectively reducing coated fertilizer carry out the extended release time；Further, by adding
Polyvinyl alcohol makes the release time of coated fertilizer further extend；The present invention is also made that further the selection of crosslinking agent
Experiment, the release time longest of coated fertilizer when being compounded using N, N '-methylene-bisacrylamides and glutaraldehyde.The present invention can
Nutrient-lapsed time is adjusted with compounding by adjusting different component, grows demand to meet different crops.The present invention makes
It is natural macromolecular material, has the advantages that degradable, free of contamination.
Specific implementation mode
It is further illustrated the present invention below by specific implementation mode, following embodiment is the preferable embodiment party of the present invention
Formula, but embodiments of the present invention are not limited by following embodiments.
Raw material of the present invention derives from commercial products.
Test mode：
The fertilizer releasing period of film-coated controlled release fertilizer：Under conditions of 25 DEG C, film-coated controlled release fertilizer is tested using water-extraction method
Fertilizer releasing period, indicated with accumulating when nutrient release rate reaches 80% required number of days；By the slow control of the coating of a certain amount of development
Into the water, nutrient is added to by coated fertilizer in water release fertilizer in film-coated controlled release fertilizer, after certain number of days, is tested respectively
The total content of nitrogen, phosphorus, potassium presses the total content of GB/T8572-2001 standard testing nitrogen, by GB/T8573-1999 standard testings
The total content of phosphorus, by the total content of GB/T8574-1988 standard testing potassium.
The preparation method of embodiment film-coated controlled release fertilizer：It is prepared by coated fertilizer aqueous dispersions：According to proportioning in reaction kettle
It is middle that distilled water, starch from sweet potato, wheat-straw powder is first added, after stirring evenly, polyvinyl alcohol, humic acid is added, is uniformly mixed,
Reactor temperature setting is gelatinized to 70 DEG C；Crosslinking agent is added, is reacted 3.5 hours at 100 DEG C, it is anti-to bring it about crosslinking
It answers；Coated fertilizer aqueous dispersions are made in stirring, cooling discharging.The preparation of film-coated controlled release fertilizer：Add in boiling type fluid bed
Enter the fertiliser granulates that 5kg grain sizes are 2-3mm, be preheated to 90 DEG C, the made coated fertilizer aqueous dispersions 5kg got ready is sprayed from double fluid
Mouth sprays to fertiliser granulates surface with certain spraying rate, and film-coated controlled release fertilizer is made.
Table 1：Embodiment each group distribution ratio（Parts by weight）, spraying rate and fertilizer releasing period test result
It can be seen that from embodiment 1-2 after polyvinyl alcohol is added, the fertilizer releasing period of fertilizer increases 23 days；From embodiment 2-4
It can be seen that N, the compounding effect of N '-methylene-bisacrylamides and glutaraldehyde is best, followed by N, N '-methylene bisacrylamides
Amide and glycerine are subsequently N, the compounding of N '-methylene-bisacrylamides and ethanedioic acid.It can from embodiment 2 and embodiment 8
To find out, coated fertilizer aqueous dispersions spraying rate is supporting for the film-coated controlled release fertilizer that 6 g/ (min*kg fertiliser granulates) are obtained
Point acquisition time is higher than 8g/ (min*kg fertiliser granulates).
Claims (9)
1. a kind of coated fertilizer, which is characterized in that in parts by weight, including following components：
40-70 parts of starch from sweet potato；
10-30 parts of wheat-straw powder；
0.01-10 parts of humic acid；
0.5-5 parts of crosslinking agent.
2. coated fertilizer according to claim 1, which is characterized in that the crosslinking agent is selected from N, N '-di-2-ethylhexylphosphine oxides third
At least one of acrylamide, glutaraldehyde, ethanedioic acid, glycerine；Preferably, N, N '-methylene-bisacrylamides and penta are selected from
Dialdehyde compounding or N, N '-methylene-bisacrylamide and glycerine compounding；It is furthermore preferred that being selected from N, N '-methylene bisacrylamides
Amide and glutaraldehyde compounding.
3. coated fertilizer according to claim 1, which is characterized in that further include 0-15 parts of polyethylene in parts by weight
Alcohol.
4. the preparation method of claim 1-2 any one of them coated fertilizers, which is characterized in that include the following steps：
A）According to proportioning, 200-1300 parts of water, starch from sweet potato, wheat-straw powder are first added in a kettle, after stirring evenly, is added
Humic acid is uniformly mixed, and reactor temperature setting is gelatinized to 50-80 DEG C；
B）Crosslinking agent is added, is reacted 3-4 hours at 85-105 DEG C, brings it about cross-linking reaction；
C）Coated fertilizer aqueous dispersions are made in stirring, cooling discharging；
D）Coated fertilizer aqueous dispersions are sprayed on the frosted glass of 65-100 DEG C of temperature or fertiliser granulates surface, after drying and forming-film
As coated fertilizer.
5. the preparation method of coated fertilizer according to claim 4, which is characterized in that in the step A with humic acid
What is be added together further includes 0-15 parts of polyvinyl alcohol.
6. the application of claim 1-3 any one of them coated fertilizers, which is characterized in that be used to prepare coating slow-release or control-release fertilizer
Material；The film-coated controlled release fertilizer is one layer of coated fertilizer of fertiliser granulates outer cladding.
7. application according to claim 6, which is characterized in that the preparation method of the film-coated controlled release fertilizer is：It presses
According to proportioning, 200-1300 parts of water, starch from sweet potato, wheat-straw powder are first added in a kettle, after stirring evenly, humic acid is added,
It is uniformly mixed, reactor temperature setting is gelatinized to 50-80 DEG C；Crosslinking agent is added, it is small that 3-4 is reacted at 85-105 DEG C
When, bring it about cross-linking reaction；Coated fertilizer aqueous dispersions are made in stirring, cooling discharging；Preferably, add together with humic acid
What is entered further includes 0-15 parts of polyvinyl alcohol；In boiling type or rotary drum fluid bed, the coated fertilizer aqueous dispersions are led to
The mode for crossing spraying is coated to fertiliser granulates surface, and water is distilled out of, and film-coated controlled release fertilizer, wherein fluidized-bed temperature 65- is made
100 DEG C, spraying rate be 4-8g/ (min*kg fertiliser granulates)；Preferably, spraying rate is 5-7g/ (min*kg fertiliser granulates).
8. application according to claim 7, which is characterized in that the coated fertilizer accounts for the weight of film-coated controlled release fertilizer
Than for 5-25%.
9. application according to claim 7, which is characterized in that the fertiliser granulates are selected from urea granules, ammonium phosphate
At least one of grain, compound fertilizer granule；The average grain diameter of the film-coated controlled release fertilizer is 1.5-3.5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810273762.7A CN108484256A (en) | 2018-03-29 | 2018-03-29 | A kind of coated fertilizer and its preparation method and application |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810273762.7A CN108484256A (en) | 2018-03-29 | 2018-03-29 | A kind of coated fertilizer and its preparation method and application |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108484256A true CN108484256A (en) | 2018-09-04 |
Family
ID=63317427
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810273762.7A Pending CN108484256A (en) | 2018-03-29 | 2018-03-29 | A kind of coated fertilizer and its preparation method and application |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108484256A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101973808A (en) * | 2010-09-28 | 2011-02-16 | 湖北富邦化工科技有限公司 | Starch coating material and application thereof in coated sustained/controlled release fertilizers |
| CN102167647A (en) * | 2011-05-09 | 2011-08-31 | 湖北富邦科技股份有限公司 | Degradable composite coating material and preparation method and application thereof in controlled release fertilizer |
| CN106699364A (en) * | 2016-12-15 | 2017-05-24 | 涓ュ垢 | Environment-friendly coated slow release fertilizercontaining biological bacteria and preparation method thereof |
| CN106699365A (en) * | 2016-12-15 | 2017-05-24 | 涓ュ垢 | Environment-friendly organic-fertilizer compound coated slow-release fertilizer and preparation method thereof |
-
2018
- 2018-03-29 CN CN201810273762.7A patent/CN108484256A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101973808A (en) * | 2010-09-28 | 2011-02-16 | 湖北富邦化工科技有限公司 | Starch coating material and application thereof in coated sustained/controlled release fertilizers |
| CN102167647A (en) * | 2011-05-09 | 2011-08-31 | 湖北富邦科技股份有限公司 | Degradable composite coating material and preparation method and application thereof in controlled release fertilizer |
| CN106699364A (en) * | 2016-12-15 | 2017-05-24 | 涓ュ垢 | Environment-friendly coated slow release fertilizercontaining biological bacteria and preparation method thereof |
| CN106699365A (en) * | 2016-12-15 | 2017-05-24 | 涓ュ垢 | Environment-friendly organic-fertilizer compound coated slow-release fertilizer and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104086318B (en) | A kind of production method of biomass coating controlled-release fertilizer | |
| CN100465136C (en) | Film coated control release composite fertilizer special for regetables and its making method | |
| CN102167647B (en) | Degradable composite coating material and preparation method and application thereof in controlled release fertilizer | |
| CN100457694C (en) | Biological biodegradable self-control slow-releasing fertilizer and preparation method thereof | |
| CN101973808B (en) | Starch coating material and application thereof in coated sustained/controlled release fertilizers | |
| CN103833471B (en) | Mid-late ripening corn special environment protection degradable granule fertilizer coating liquid and preparation method thereof | |
| CN103626598B (en) | functional chitosan biological slow-release fertilizer and preparation method thereof | |
| CN103319252B (en) | A kind of polyurethane coated controlled-release fertilizer containing weedicide and preparation method thereof | |
| CN103936501B (en) | A kind of biomass synthetic epoxy resin film-coated controlled release fertilizer and production method thereof | |
| CN104496685A (en) | Preparation method of water retention type controlled-release urea formaldehyde compound fertilizer | |
| CN104496650A (en) | Total-nutrient water-retaining degradable mechanically-applied coated fertilizer | |
| CN106589258B (en) | The preparation method and its coating method of degradable temperature-responsive slow-release or control-release fertilizer coated fertilizer | |
| EP3305746A1 (en) | Organic-inorganic polymeric water-retaining fertilizer and preparation method therefor | |
| CN108516899B (en) | Functional slow/controlled release fertilizer core based on bio-based binder and preparation method thereof | |
| CN103880535A (en) | Preparation method of slow-release compound fertilizer | |
| CN105272602B (en) | Coated fertilizer and its preparation method and application is blended with lotus leaf powder in a kind of starch | |
| CN101244966B (en) | Biological degradable multifunctional automatic control slow release fertilizer and manufacture method thereof | |
| CN105777367A (en) | Long-acting environment-friendly coated slow release compound fertilizer used for planting oryza sativa and preparation method thereof | |
| CN101759490B (en) | Slowly-controlled-release diammonium phosphate | |
| CN110105141A (en) | A kind of charcoal slow-release fertilizer of bio oil coating processing | |
| CN105237221A (en) | Rare earth element-rich coating material and preparation method and application thereof | |
| CN104291973A (en) | Controlled-release carrier and application of controlled-release carrier in controlled release of moisture and fertilizer required for potted crops | |
| CN108484256A (en) | A kind of coated fertilizer and its preparation method and application | |
| CN109574748A (en) | A kind of Synergistic slow release coated fertilizer and preparation method thereof | |
| CN108101626A (en) | A kind of ecology sustained release organic film fertilizer and preparation method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180904 |
|
| RJ01 | Rejection of invention patent application after publication |