CN108358706A - A kind of coated slow-release urea fertilizer and preparation method - Google Patents
A kind of coated slow-release urea fertilizer and preparation method Download PDFInfo
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- CN108358706A CN108358706A CN201810393965.XA CN201810393965A CN108358706A CN 108358706 A CN108358706 A CN 108358706A CN 201810393965 A CN201810393965 A CN 201810393965A CN 108358706 A CN108358706 A CN 108358706A
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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
- C05G5/30—Layered or coated, e.g. dust-preventing coatings
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05C—NITROGENOUS FERTILISERS
- C05C9/00—Fertilisers containing urea or urea compounds
-
- 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
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Abstract
A kind of coated slow-release urea fertilizer and preparation method, belong to fertilizer preparing technical field.It is characterized in that：It is coated with mill base film, isonitrile acid adipose membrane and curing agent film from inside to outside including granular urea, outside granular urea, the mass ratio of the granular urea and isonitrile acid fat in isonitrile acid adipose membrane is 1.3 ~ 3.8：100.Granular urea is sieved into the granularity by 2.00~3.00mm, the raw material of mill base film, isonitrile acid adipose membrane and curing agent film is successively subjected to coating with granular urea mixed once, is made after screened and packaging.Gained Controlled Release Fertilizer of the invention can extend controlled release period to 90 ~ 120 days, than conventional more 30 days or more, achieve the purpose that not top dressing plays the role of top dressing again in this way.
Description
Technical field
A kind of coated slow-release urea fertilizer and preparation method, belong to fertilizer preparing technical field.
Background technology
The universal nitrogen stress of China's agricultural land soil, applied nitrogen are to ensure high yield, stabilization, high-quality, high-efficiency agriculture key arrange
One of apply.Currently, the principal item of the world and China's nitrogenous fertilizer is still urea.Urea is high with its available nutrient concentration, functional,
Be easy storing, it is easy to use the advantages that accepted by consumers in general.But urea is after application in the effect of soil urease
Finally it is hydrolyzed to CO down2And NH3, under certain environmental conditions, such as rainfall is irrigated, then easily causes leaching loss and volatilization loss, because
The utilization rate of this nitrogen is relatively low, and the whole nation averagely only has 36%.It is common with base fertilizer and the application of the traditional approach of top dressing in method of administration
Based on urea, a large amount of loss of nitrogen fertilizer is caused every year, and the input of labour, causes input-output ratio to increase in addition, makes peasant
Income reduce, plant grain enthusiasm weaken.
The inefficient utilization of nitrogen not only causes the huge waste of the energy and resource, but also is produced to living environment bad
The problems such as consequence such as pollutes underground water, agricultural product, generation body eutrophication and greenhouse effects.Therefore, nitrogenous fertilizer is improved
Utilization rate, mitigate or exempt fertilizer pollution, develop sustainable high-efficiency agriculture have become various countries jointly concern and it is anxious to be resolved
Project.
Slow-release carbamide has Nitrogen releasing slow, and the fertilizer efficiency duration is long, and utilization rate of nitrogen fertilizer is high, can all make base fertilizer and apply
With the features such as, so be to solve that utilization rate of nitrogen fertilizer is low using slow-release carbamide, reduce nitrogen loss and good the problems such as difficult top dressing
Good measure.Currently, countries in the world, in the slow release method for greatly developing nitrogenous fertilizer, coated carbamide is exactly one such, preparation method
It is to control the release of nitrogen by permeability of the membrane in the film of urea granules surface one layer of slightly solubility of coating, reach and once apply
Nitrogen requirement is needed with meet crop entire breeding time, and can be mitigated significantly due to nitrogen loss caused by decomposition, volatilization, leaching etc.,
Improve the utilization rate of nitrogen.
Foreign countries' coating type urea is mainly sulfur-coated urea and Polymer coated urea at present.But there are two external coated carbamides
Maximum weakness：When expensive price, since its production technology is considerably complicated, it is desirable that fine, commercial fertilizer price per ton
It is more than thousands of dollars, up to the 3 ~ 9 of common fertilizer times, is difficult to receive even if developed country；Second is that being coerced by environment
Compel, the high molecular material selected, which takes 30 years, to degrade, and coated fertilizer component accounts for the 10 ~ 20% of coated fertilizer total amount, consumption
Ratio is higher, if being used for a long time, coating residue will necessarily bring serious environmental consequence to soil.Now it is simply possible to use in public affairs
The garden crops such as garden, meadow, golf course and the higher fruit tree of economic value, vegetables and flowers.
Several main coated carbamides that the country currently forms have coating urea, ardealite coated carbamide and calcium magnesium phosphate coating
Urea, these products all have slow control action, utilization rate of nitrogen fertilizer can be improved, although coating quantity is few compared with external, cost
It is relatively low, but its slow release majority is too fast, cannot match with the suction nitrogen peak period of crops, with Europe, the United States, day etc. in production technology
There are still larger gaps for state, are used for agricultural production not yet fairly largely so far.
Invention content
The technical problem to be solved by the present invention is to：Overcome the deficiencies of the prior art and provide that a kind of price is low, had good sustained release effect
Coated slow-release urea fertilizer and preparation method.
The technical solution adopted by the present invention to solve the technical problems is：The coated slow-release urea fertilizer, it is characterised in that：
Including granular urea, mill base film, isonitrile acid adipose membrane and curing agent film, particle urine are coated with outside granular urea from inside to outside
The mass ratio of element and isonitrile acid fat in isonitrile acid adipose membrane is 100：1.3~3.8.
The present invention adjusts the rate of release and burst size of nitrogen by multilayer coating, its release time is controlled, so as to same
The suction nitrogen peak period of crops matches, and is saved with coating materials, and cost is low, is easy to popularize for field crops,
Nitrogenous fertilizer is reduced to environment and pollution of agricultural products, manufacture craft is simple, is suitble to the slow-release carbamide and preparation method thereof of mass production,
To overcome defect existing for existing slow-release carbamide.
The mass ratio of the granular urea and isonitrile acid fat in isonitrile acid adipose membrane is 100：1.5~2.7.Preferred particle
The mass-energy density of urea and isonitrile acid adipose membrane accesses rate of release and the release time of more suitable nitrogen.
The parts by weight of raw materials group of the mill base film becomes 3 ~ 8 parts of aqueous pigment preparations, and 1 ~ 2.3 part of isonitrile acid fat is described
The mass ratio of granular urea and mill base film be 100：1.3~2.9.The function of conventional granulation of fertilizer dyeing assistant is in addition to dyeing
In addition, also have the function of making more smooth fertiliser granulates, raising granulation balling ratio, reduction dust, it is basic using fertilizer coloration agent
On be in order to meet manufacturing enterprise production and realize commodity the needs of.And the essence of chemical fertilizer is to provide nutriment for crop,
Meet crop growth needs, the improvement of appearance has no benefit to agricultural production.The raw material weight of currently preferred mill base film
Part composition enhances the bond strength of isonitrile acid adipose membrane and granular urea while this fertilizer appearance can be made more mellow and fuller, prevent from wrapping
Film falls off.
The group of the curing agent film becomes dicyandiamide, and the mass ratio of the granular urea and dicyandiamide is 100：2.1~
3.9.Dicyandiamide is also known as dicyanodiamine, and curing mechanism is more complex, and in addition to 4 hydrogen on dicyandiamide can participate in reaction, cyano also has
There is certain reactivity.Curing agent film as this fertilizer is controlling the rate of release of nitrogen and while release time, energy
Add a step to reinforce packet film strength, adapts to the stirring intensity of modern agriculture big machinery operation, extend the time limit of storage, avoid storing up
Deposit and use during demoulding occur.
A kind of preparation method of above-mentioned coated slow-release urea fertilizer, it is characterised in that：Granular urea is sieved by 2.00
The granularity of~3.00mm successively carries out the raw material of mill base film, isonitrile acid adipose membrane and curing agent film with granular urea mixed once
Coating, coating temperature be 60 DEG C~70 DEG C it is screened and packaging after be made.Preparation method is simple, it is only necessary to according to proportioning sequence packet
Film can realize good coating function.
The molten raw material alcohol solvent of the mill base film and curing agent film is solution, the raw material of mill base film and the matter of ethyl alcohol
Amount is than being 1：2 ~ 3, the raw material of curing agent film and the mass ratio of ethyl alcohol are 1：1.5~2.1.It can enhance with use ethanol as solvent
Coating intensity, simultaneously as itself is nontoxic also safer.
The invention further relates to a kind of equipment prepared used in coated slow-release urea fertilizer, including coating roller, coating rollers
The cylinder of the diameter 50cm ~ 120cm, long 5m ~ 10m that are placed at -10 ° ~ 10 ° for pitch angle, coating roller are equipped with Power Component,
Coiled coil has a plurality of evagination to push striped in the same direction on the inner wall of coating roller, the front end of coating roller be feeding port,
The rear end of coating roller is discharge port.Coating roller is the cylinder close to horizontal positioned section feeding one end discharging, Neng Gouzhi
It connects and is arranged in lower position, without by excessive too high of material, feeding intake very convenient when feeding intake.The urea and coating of input
Raw material is constantly rolled to discharge port under the action of coiled coil pushes striped and gravity, and coating is completed in mobile process,
Can continuously feed intake and coating, production efficiency greatly improves, quality also more stablize it is unified.
The Power Component includes being fixed on the driven rack of the supermedial circle of coating roller outer wall and output shaft to fill
Cogged power motor, driven rack and pinion engagement.Preferred Power Component is the driven rack and pinion of engagement, transmission
It is efficient, it also allows for safeguarding；Certain Power Component can also pass through the kinds of drive such as transmission belt, driving chain.
Each track strip of the front and rear of the coating roller, the bottom of coating roller, which is equipped with, is made track strip
Carrying roller.The track strip and carrying roller of front and back setting can reduce the resistance of rotation, ensure coating roller stability of rotation.
Compared with prior art, possessed advantageous effect of the invention is：Granular urea CO (NH2) is through high molecular polymerization
It is screwed in soil after object isonitrile acid fat coating, the high polymer film-coated barrier action for playing nutrient diffusion, moisture passes through
The micropore of coating enters and makes urea slow mechanism dissolved, to achieve the purpose that nutrient slow release.Packet as slow-release carbamide
Membrane material isonitrile acid fat, there is an extraordinary film forming, and urea and isonitrile acid fat not chemically reactive, and the two is immiscible.
For different crops, the rate of release and burst size of nitrogen are adjusted by selecting membrane wrapping thickness appropriate, it is controlled and releases
The time is put, is matched so as to the suction nitrogen peak period of same crops.Gained Controlled Release Fertilizer of the invention can extend controlled release period to 90 ~ 120
It achieved the purpose that not top dressing played the role of top dressing again in this way than conventional more 30 days or more.
Description of the drawings
Fig. 1 is a kind of schematic diagram for slow-release carbamide fertilizer coating device that the present invention uses.
Fig. 2 is a kind of schematic cross-section of the coating roller for slow-release carbamide fertilizer coating device that the present invention uses.
Fig. 3 is a kind of schematic diagram for slow-release carbamide fertilizer coating device equipped with material-feeding platform that the present invention uses.
Wherein, 1, coating roller 2, track strip 3, driven rack 4, evagination push striped 5, gear 6, power motor
7, holder 8, conveyer belt 9, funnel 10, bag filling frame 11, material-feeding platform 12, guardrail 13, the band 14 that feeds intake, ladder 15, heating
Cylinder.
Specific implementation mode
With reference to attached drawing 1,2：A kind of slow-release carbamide fertilizer coating device that the present invention uses, including three series connection（In figure not
It draws）Coating roller 1, conveyer belt 8, funnel 9 and bag filling frame 10, the lower part of coating roller 1 is fixed with holder 7, coating roller 1
For the cylinder of diameter 50cm ~ 120cm, long 5m ~ 10m, the inclination angle of coating roller 1 and horizontal plane is -10 ° ~ 10 °, coating roller 1
It is equipped with Power Component, Power Component includes being fixed on the driven rack 3 of the supermedial circle of 1 outer wall of coating roller and output shaft
Power motor 6 equipped with gear 5, driven rack 3 and gear 5 engage, and discharge velocity is adjusted by rotating speed and pitch angle；Coating roller
Coiled coil has a plurality of evagination to push striped 4 in the same direction on the inner wall of cylinder 1, combines evagination to push item in the case of rotation
Line 4 and gravity, urea and coating material can be rolled constantly to be moved to discharge port；The front end of coating roller 1 is feeding port, coating
The rear end of roller 1 is discharge port；With reference to attached drawing 3：The front of coating roller 1 is equipped with material-feeding platform 11 and the band 13 that feeds intake, and feed intake band 13
Output end be located in the feeding port of coating roller 1, material-feeding platform 11 is located at the side for the band 13 that feeds intake, and 11 apical side height of material-feeding platform is high
In the input terminal for the band 13 that feeds intake, a high position feeds intake more laborsaving, and guardrail, the material-feeding platform are surrounded by the top surface of material-feeding platform 11
11 are equipped with the ladder 14 on connection ground and the top surface of material-feeding platform 11；It is equipped with cartridge heater 15 between material-feeding platform 11 and the band 13 that feeds intake, adds
The feeding port of hot cylinder 15 is located at 11 side of material-feeding platform, and the discharge port of cartridge heater 15 is equipped with above the band 13 that feeds intake in cartridge heater 15
Electric heating tube；The input terminal of conveyer belt 8 is located at below the discharge port of coating roller 1, and the feeding port of funnel 9 is located at conveyer belt 8
The lower section of output end uploads the good urea of coating, and funnel 9 is fixed on the top of bag filling frame 10；The front of coating roller 1 is with after
Each track strip 2 in portion, the bottom of coating roller 1 are equipped with the carrying roller that track strip 2 is made so that 1 stability of rotation of coating roller.
With reference to specific embodiment, the present invention will be further described, and wherein embodiment 1 is best implements.
Embodiment 1
The granularity of 2.00~3.00mm during granular urea is sieved into, 100kg is left and taken after metering.Take the pure isonitrile acid fat of analysis
The parts by weight of raw materials group of 2.5kg, the raw material 2.5kg of mill base film, mill base film become 6 parts of aqueous pigment preparations, isonitrile acid fat 1.8
Part；It is solution that the raw material alcohol solvent of 2.5 kg of dicyandiamide, mill base film and curing agent film is molten, the raw material of mill base film and ethyl alcohol
Mass ratio is 1：2.5, the mass ratio of dicyandiamide and ethyl alcohol is 1：1.8, solution temperature is 90 DEG C, is all measured after dissolving, right
The quantity that the ethyl alcohol of volatilization complements to before volatilization obtains coating solution.
Above-mentioned granular urea is placed in coating roller 1,70 revs/min of coating roller, coating temperature is set as 60 DEG C；Simultaneously will
Above-mentioned mill base coating solution and granular urea mixed once, material enter the once input isonitrile acid of concatenated next coating roller 1
Fat, then material put into dicyandiamide solution again into concatenated next coating roller 1；It is dry to complete coating, by coating
The granularity of 2.00 ~ 3.00mm during granular urea is sieved into uses woven bags packaging spare after often accumulating 25 kg.
Embodiment 2
The granularity of 2.00~3.00mm during granular urea is sieved into, 100kg is left and taken after metering.Take the pure isonitrile acid fat of analysis
The parts by weight of raw materials group of 1.9kg, the raw material 2.7kg of mill base film, mill base film become 4 parts of aqueous pigment preparations, 2 parts of isonitrile acid fat；
The molten raw material alcohol solvent of 2.4 kg of dicyandiamide, mill base film and curing agent film is solution, the raw material of mill base film and the matter of ethyl alcohol
Amount is than being 1：2.8, the mass ratio of dicyandiamide and ethyl alcohol is 1：1.7, solution temperature is 90 DEG C, is all measured after dissolving, to waving
The quantity that the ethyl alcohol of hair complements to before volatilization obtains coating solution.
Above-mentioned granular urea is placed in coating roller 1,70 revs/min of coating roller, coating temperature is set as 65 DEG C；Simultaneously will
Above-mentioned mill base coating solution and granular urea mixed once, material enter the once input isonitrile acid of concatenated next coating roller 1
Fat, then material put into dicyandiamide solution again into concatenated next coating roller 1；It is dry to complete coating, by coating
The granularity of 2.00 ~ 3.00mm during granular urea is sieved into uses woven bags packaging spare after often accumulating 25 kg.
Embodiment 3
The granularity of 2.00~3.00mm during granular urea is sieved into, 100kg is left and taken after metering.Take the pure isonitrile acid fat of analysis
The parts by weight of raw materials group of 3.2kg, 1.7 kg of raw material of mill base film, mill base film become 7 parts of aqueous pigment preparations, isonitrile acid fat 1.3
Part；It is solution that the raw material alcohol solvent of dicyandiamide 3.4kg, mill base film and curing agent film is molten, the raw material of mill base film and ethyl alcohol
Mass ratio is 1：2.3, the mass ratio of dicyandiamide and ethyl alcohol is 1：1.9, solution temperature is 90 DEG C, is all measured after dissolving, right
The quantity that the ethyl alcohol of volatilization complements to before volatilization obtains coating solution.
Above-mentioned granular urea is placed in coating roller 1,70 revs/min of coating roller, coating temperature is set as 70 DEG C；Simultaneously will
Above-mentioned mill base coating solution and granular urea mixed once, material enter the once input isonitrile acid of concatenated next coating roller 1
Fat, then material put into dicyandiamide solution again into concatenated next coating roller 1；It is dry to complete coating, by coating
The granularity of 2.00 ~ 3.00mm during granular urea is sieved into uses woven bags packaging spare after often accumulating 25 kg.
Embodiment 4
The granularity of 2.00~3.00mm during granular urea is sieved into, 100kg is left and taken after metering.Take the pure isonitrile acid fat of analysis
The parts by weight of raw materials group of 1.3kg, 2.9 kg of raw material of mill base film, mill base film become 3 parts of aqueous pigment preparations, isonitrile acid fat 2.3
Part；It is solution that the raw material alcohol solvent of dicyandiamide 2.1kg, mill base film and curing agent film is molten, the raw material of mill base film and ethyl alcohol
Mass ratio is 1：3, the mass ratio of dicyandiamide and ethyl alcohol is 1：1.5, solution temperature is 90 DEG C, is all measured after dissolving, to waving
The quantity that the ethyl alcohol of hair complements to before volatilization obtains coating solution.
Above-mentioned granular urea is placed in coating roller 1,70 revs/min of coating roller, coating temperature is set as 70 DEG C；Simultaneously will
Above-mentioned mill base coating solution and granular urea mixed once, material enter the once input isonitrile acid of concatenated next coating roller 1
Fat, then material put into dicyandiamide solution again into concatenated next coating roller 1；It is dry to complete coating, by coating
The granularity of 2.00 ~ 3.00mm during granular urea is sieved into uses woven bags packaging spare after often accumulating 25 kg.
Embodiment 5
The granularity of 2.00~3.00mm during granular urea is sieved into, 100kg is left and taken after metering.Take the pure isonitrile acid fat of analysis
The parts by weight of raw materials group of 3.80kg, the raw material 1.3kg of mill base film, mill base film become 8 parts of aqueous pigment preparations, 1 part of isonitrile acid fat；
The molten raw material alcohol solvent of 3.9 kg of dicyandiamide, mill base film and curing agent film is solution, the raw material of mill base film and the matter of ethyl alcohol
Amount is than being 1：2, the mass ratio of dicyandiamide and ethyl alcohol is 1：2.1, solution temperature is 90 DEG C, is all measured after dissolving, to volatilization
Ethyl alcohol complement to volatilization before quantity obtain coating solution.
Above-mentioned granular urea is placed in coating roller 1,70 revs/min of coating roller, coating temperature is set as 60 DEG C；Simultaneously will
Above-mentioned mill base coating solution and granular urea mixed once, material enter the once input isonitrile acid of concatenated next coating roller 1
Fat, then material put into dicyandiamide solution again into concatenated next coating roller 1；It is dry to complete coating, by coating
The granularity of 2.00 ~ 3.00mm during granular urea is sieved into uses woven bags packaging spare after often accumulating 25 kg.
Embodiment 6
The granularity of 2.00~3.00mm during granular urea is sieved into, 100kg is left and taken after metering.Take the pure isonitrile acid fat of analysis
The parts by weight of raw materials group of 4.3kg, the raw material 1.0kg of mill base film, mill base film become 2 parts of aqueous pigment preparations, 4 parts of isonitrile acid fat；
The molten raw material alcohol solvent of dicyandiamide 1kg, mill base film and curing agent film is solution, the raw material of mill base film and the mass ratio of ethyl alcohol
It is 1：1, the mass ratio of dicyandiamide and ethyl alcohol is 1：4, solution temperature is 90 DEG C, is all measured after dissolving, to the ethyl alcohol of volatilization
The quantity complemented to before volatilization obtains coating solution.
Above-mentioned granular urea is placed in coating roller 1,70 revs/min of coating roller, coating temperature is set as 60 ~ 70 DEG C；Together
When, once puts into different by above-mentioned mill base coating solution and granular urea mixed once, material into concatenated next coating roller 1
Nitrile acid fat, then material put into dicyandiamide solution again into concatenated next coating roller 1；It is dry to complete coating, it will
The granularity of 2.00 ~ 3.00mm during coated granule urea is sieved into uses woven bags packaging spare after often accumulating 25 kg.
The technical indicator that slow-release carbamide is made in embodiment is shown in Table 1
。
The measurement of total nitrogen content：It is carried out according to the regulation of GB/T2441.
The measurement of Biuret Content：It is carried out according to the regulation of GB/T2443.
The measurement of moisture：It is carried out according to the regulation of GB/T2444.
The measurement of granularity：It is carried out according to the regulation of GB/T2448.
The measurement of coating expulsion rate：
Operating procedure：250ml beakers are taken, water 150ml or so is added, 20~30 (T) slow-release carbamides is then taken at random, is put into and is filled with water
Beaker in, slow-release carbamide all dissolving after, directly check in ghost quantity (t) in the water surface.Experiment in triplicate, takes its arithmetic flat
Mean value.
Computational methods：Coating expulsion rate (%)=(T-t) x 100/T
The measurement of water insoluble matter content：It is carried out according to the regulation of GB/T2447.
It is other to be executed by granular urea national standard (GB2440-2001).
Influence of the result of study of the laboratory test part coating quantity different from analysis to the release dynamics of nitrogen in slow-release carbamide
Select I（Isocyanates）Culture experiment is done for the slow-release carbamide of coated fertilizer.
(1) testing program
Culture experiment sets (1) blank test altogether（Blank）；(2) check experiment（Control）；(3)I1；(4)I2；(5) I3 totally five
Processing, repeats three times.
Blank test（Blank）Not apply any fertilizer, the same terms culture, sampling.Check experiment（Control）It is in soil
Common urea, the same terms culture sampling are applied in earth.I1, I2 and I3 are respectively represented using embodiment 1, embodiment 3 and are implemented
The slow-release carbamide of example 6.
(2) test method
150mg samples are weighed, are imposed in the glass container of high 25cm, radius 7.5cm, 500 grams of native weight, humidity is about 30%, each fertilizer
Material uniformly imposes in the soil layer of soil depth l0cm, seals, the shading of earth pillar part.Each processing respectively sets 10,20,30,40,50,60,
70, the different incubation times of 80,90,100,110,120 days (d), repeat, are placed under natural temperature three times.Results of regular determination is identical
After cultivated days, NH in the soil respectively handled4 +And N03 —Content, while setting blank and check experiment.
(3) test result
The result is shown in tables 2 for influence of the different coating quantities to the release dynamics of nitrogen in slow-release carbamide.
Influence of the different coating quantities of table 2 to slow-release carbamide nitrogen release dynamics in the soil
。
Note：7d is the 7th day in table, and remaining the rest may be inferred.Burst size is cumulative release amount, and all data are to subtract blank test
Data afterwards.
As can be seen from the above table, the rate of release of I1 ~ I3 obviously delays in control.The release conditions of nitrogen are basic in each processing
It is the state of " early period is few, and mid-term is more, and the later stage eases up ".
The nitrogen of I1, I2 discharge peak about at 70 ~ 90 days；The nitrogen of I3 discharges peak about at 60 ~ 90 days；Control treatment
Nitrogen discharge peak about at 15 ~ 27 days.And the suction nitrogen peak In Changchun County of crop is present approximately in 80 ~ 100 days.From the above feelings
It will be seen that release peak period I1, I2 ratio control of nitrogen is delayed 40 days or so, I3 is delayed 25 days or so condition.I1 and I2 are
Nitrogen peak period is inhaled with corn to approach, I3 shifts to an earlier date slightly, and three is available, but I1, I2 blowout corresponding with crop growth period
Release for rice growth advantageously, nitrogen use efficiency higher.
The above described is only a preferred embodiment of the present invention, being not that the invention has other forms of limitations, appoint
What those skilled in the art changed or be modified as possibly also with the technology contents of the disclosure above equivalent variations etc.
Imitate embodiment.But it is every without departing from technical solution of the present invention content, according to the technical essence of the invention to above example institute
Any simple modification, equivalent variations and the remodeling made, still fall within the protection domain of technical solution of the present invention.
Claims (9)
1. a kind of coated slow-release urea fertilizer, it is characterised in that：Including granular urea, coated from inside to outside outside granular urea coloured
The mass ratio of serous coat, isonitrile acid adipose membrane and curing agent film, the granular urea and isonitrile acid fat in isonitrile acid adipose membrane is 100：
1.3~3.8。
2. a kind of coated slow-release urea fertilizer according to claim 1, it is characterised in that：The granular urea and isonitrile
The mass ratio of isonitrile acid fat is 100 in sour adipose membrane：1.5~2.7.
3. a kind of coated slow-release urea fertilizer according to claim 1, it is characterised in that：The raw material weight of the mill base film
Measuring part group becomes 3 ~ 8 parts of aqueous pigment preparations, 1 ~ 2.3 part of isonitrile acid fat, and the mass ratio of the granular urea and mill base film is
100：1.3~2.9.
4. a kind of coated slow-release urea fertilizer according to claim 1, it is characterised in that：The composition of the curing agent film
For dicyandiamide, the mass ratio of the granular urea and dicyandiamide is 100：2.1~3.9.
5. a kind of preparation method according to claim 1 ~ 4 any one of them coated slow-release urea fertilizer, it is characterised in that：It will
Granular urea is sieved into the granularity by 2.00~3.00mm, by the raw material of mill base film, isonitrile acid adipose membrane and curing agent film successively with
Granular urea mixed once carries out coating, and coating temperature is 60 DEG C~70 DEG C, is made after screened and packaging.
6. a kind of preparation method of coated slow-release urea fertilizer according to claim 5, it is characterised in that：The mill base
The molten raw material alcohol solvent of film and curing agent film is solution, and the raw material of mill base film and the mass ratio of ethyl alcohol are 1：2 ~ 3, curing agent
The raw material of film and the mass ratio of ethyl alcohol are 1：1.5~2.1.
7. the encapsulation tool used in a kind of preparation method of coated slow-release urea fertilizer according to claim 5, feature
It is：Including coating roller（1）, coating roller（1）Diameter 50cm ~ 120cm, the long 5m placed at -10 ° ~ 10 ° for pitch angle ~
The cylinder of 10m, coating roller（1）It is equipped with Power Component, coating roller（1）Inner wall in the same direction coiled coil have it is more
Evagination pushes striped（4）, coating roller（1）Front end be feeding port, coating roller（1）Rear end be discharge port.
8. a kind of encapsulation tool according to claim 7, it is characterised in that：The Power Component includes being fixed on coating
Roller（1）The driven rack of the supermedial circle of outer wall（3）With on output shaft be equipped with gear（5）Power motor（6）, driven rack
（3）And gear（5）Engagement.
9. a kind of encapsulation tool according to claim 7, it is characterised in that：The coating roller（1）Front and after
Each track strip in portion（2）, coating roller（1）Bottom be equipped with track strip is made（2）Carrying roller.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810393965.XA CN108358706A (en) | 2018-04-27 | 2018-04-27 | A kind of coated slow-release urea fertilizer and preparation method |
Applications Claiming Priority (1)
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| CN201810393965.XA CN108358706A (en) | 2018-04-27 | 2018-04-27 | A kind of coated slow-release urea fertilizer and preparation method |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101709018A (en) * | 2009-12-15 | 2010-05-19 | 尹明灯 | Large-particle fertilizer |
| CN204529698U (en) * | 2015-04-16 | 2015-08-05 | 五原县润泽生物科技有限责任公司 | A kind of fertilizer coating machine |
| CN205368177U (en) * | 2015-10-16 | 2016-07-06 | 重庆华强生态肥业有限公司 | Compound fertilizer's diolame device |
| CN107879765A (en) * | 2017-11-17 | 2018-04-06 | 北京市农林科学院 | Controlled release inhibitor coated carbamide and preparation method and application |
-
2018
- 2018-04-27 CN CN201810393965.XA patent/CN108358706A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101709018A (en) * | 2009-12-15 | 2010-05-19 | 尹明灯 | Large-particle fertilizer |
| CN204529698U (en) * | 2015-04-16 | 2015-08-05 | 五原县润泽生物科技有限责任公司 | A kind of fertilizer coating machine |
| CN205368177U (en) * | 2015-10-16 | 2016-07-06 | 重庆华强生态肥业有限公司 | Compound fertilizer's diolame device |
| CN107879765A (en) * | 2017-11-17 | 2018-04-06 | 北京市农林科学院 | Controlled release inhibitor coated carbamide and preparation method and application |
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