CN104163728B - Double-coated long-acting controlled-release fertilizer and preparation method thereof - Google Patents
Double-coated long-acting controlled-release fertilizer and preparation method thereof Download PDFInfo
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- CN104163728B CN104163728B CN201410447354.0A CN201410447354A CN104163728B CN 104163728 B CN104163728 B CN 104163728B CN 201410447354 A CN201410447354 A CN 201410447354A CN 104163728 B CN104163728 B CN 104163728B
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Abstract
The invention discloses a double-coated long-acting controlled-release fertilizer and a preparation method thereof. The preparation method comprises the following steps: sequentially spraying a coating liquid containing polyglutamic acid and a resin coating liquid on the fertilizer core surface made of common fertilizer, and respectively forming a coated film. Compared with the prior art, the double-coated long-acting controlled-release fertilizer can keep stable release rate in the whole nutrient slow-release process, and has higher utilization ratio than the existing coated controlled-release fertilizer.
Description
Technical field
The invention belongs to field of fertilizer production, specifically relate to a kind of double-contracting film long-effect slow-release or control-release fertilizer and preparation method thereof.
Background technology
China is large agricultural country, Yi Shi chemical fertilizer consumption big country, and fertilizer consumption total amount occupies the world.But the change that China uses
Fertile this season utilization rate is but than relatively low.The loss of a large amount of fertilizer, not only causes huge economic loss, but also can cause serious
Environmental pollution.Therefore, for adapting to the requirement of developing modern agriculture, overcome the bottleneck of resource environment constraint, ensure grain product
On the premise of amount, minimizing chemical fertilizer puts into, improves utilization rate of fertilizer, environmental protection is the urgent task that agricultural faces.Slow control
Release the fertile progressively slow release by fertilizer, decrease fertilizer loss, improve fertilizer utilization, just catered to this demand.
, based on film-coated controlled release fertilizer, peplos class sustained-controll-release fertiliser is by fertile core+coating layer structure for existing sustained-controll-release fertiliser
Become.Although peplos class slow-release or control-release fertilizer species in the market is various, nutrient still discharges in the early stage of slow release process and mid-term
Too fast, reduce utilization rate of fertilizer, cause substantial amounts of waste.Therefore be badly in need of develop a kind of nutrients release more meet plant support
Divide absorption demand, utilize more efficient peplos class slow-release or control-release fertilizer.
Content of the invention
The technical problem to be solved in the present invention be for existing peplos class Controlled Release Fertilizer nutrient slowly-released process early stage and
Mid-term discharges too fast, the present situation that utilization rate of fertilizer still reduces, and develops a kind of double-contracting film long-effect slow-release or control-release fertilizer.
Present invention technical problem also to be solved is to provide a kind of preparation method of double-contracting film long-effect slow-release or control-release fertilizer.
For solving above-mentioned technical problem, the technical solution used in the present invention is as follows:
A kind of double-contracting film long-effect slow-release or control-release fertilizer, it includes fertile core, polyglutamic acid peplos and coated with resin from the inside to the outside.
Wherein, fertile core fertilizer releasing period is 1-12 month.
Wherein, the double-contracting film long-effect slow-release or control-release fertilizer of the present invention can be adjusted according to membrane wrapping thickness, can accurately control
At 1 month to 12 months:
When polyglutamic acid film thickness is 0.1～0.5mm, and when coated with resin thickness is 0.1mm～0.3mm, fertile core nutrient
Acquisition time is 1～3 month；
When polyglutamic acid film thickness is 0.1～0.5mm, and when coated with resin thickness is 0.3mm～0.5mm, fertile core nutrient
Acquisition time is 3～6 months；
When polyglutamic acid film thickness is 0.1～0.5mm, and when coated with resin thickness is 0.5mm～0.7mm, fertile core nutrient
Acquisition time is 6～9 months；
When polyglutamic acid film thickness is 0.1～0.5mm, and when coated with resin thickness is 0.7mm～0.9mm, fertile core nutrient
Acquisition time is 9～12 months.
Wherein, described fertile core is to be made up of with adjuvant main fertilizer, and described main fertilizer is included in nitrogenous fertilizer, phosphate fertilizer and potash fertilizer
Any one or a few combination, preferably carbamide, ammonium hydrogen carbonate, ammonium nitrate, ammonium sulfate, Diammonium phosphate (DAP), ammonium dihydrogen phosphate, sulfur
Any one or a few combination in sour potassium, potassium chloride or nitrophosphate fertilizer.Described adjuvant be fulvic acid, wooden sodium sulfonate,
Any one or a few combination in dolomite, Paris white, attapulgite and kieselguhr.
Wherein, described polyglutamic acid peplos, be evaporated by the coating liquid containing polyglutamic acid prepared, wherein, described poly- paddy
The mean molecule quantity of propylhomoserin is 5-3000kda, and preferred polyglutamic acid mean molecule quantity is 5-1000kda, most preferably poly- paddy
Propylhomoserin mean molecule quantity is 5-500kda.Described polyglutamic acid is polyglutamic acid sterling, polyglutamate sterling, comprises polyglutamic
Any one or a few group in the fermentation culture medium of acid, polyglutamic acid solution and the wettable powder containing polyglutamic acid
Close.
Polyglutamate sterling includes having chelated the polyglutamic acid of one or more element such as na, k, ca, mn, cu, zn, fe
Salt.
Polyglutamic acid solution includes the aqueous solution of polyglutamic acid gel solution, polyglutamic acid or polyglutamate sterling.
Powder containing polyglutamic acid includes powdery dried object, polyglutamic acid sterling or the polyglutamic of polyglutamic acid fermentation liquid
Hydrochlorate sterling combines powder with other adjunct ingredients are formulated.
The fermentation culture medium comprising polyglutamic acid includes including the poly- paddy that polyglutamic acid produces bacterial strain and fermentation medium
Propylhomoserin fermentation liquid, the concentrated solution of polyglutamic acid fermentation liquid or dried object.
The Related product of above-mentioned polyglutamic acid all can be bought or according to prior art preparation from market.
The preferred gamma-polyglutamic acid-of polyglutamic acid of the present invention.
Wherein, in described coated with resin, resin used is one kind or several of polyvinyl resin, epoxy resin and polyurethane
Kind.
Wherein, polyglutamic acid coating layer quality accounts for the one thousandth of gross mass one of to percentage, and coated with resin layer quality accounts for
One of percentage of gross mass is to 1/10th.
The preparation method of above-mentioned double-contracting film long-effect slow-release or control-release fertilizer, it comprises the steps:
(1), in will be rotary drum fluid-bed for the addition of fertile core, it be passed through 50-80 DEG C of air, rotary drum fluid-bed interior rotate, will contain
The coating liquid of polyglutamic acid sprays on fertiliser granulates, and coating liquid is evaporated in hot-air, forms the first tunic in fertile wicking surface
I.e. polyglutamic acid peplos；
(2), after the fertilizer cooling of gained in step (1), coated with resin liquid is sprayed on particle surface, after cooling, forms the
Two tunics are coated with resin.
Wherein, the described peplos formula of liquid containing polyglutamic acid is that 1g polyglutamic acid is dissolved in 50ml to 1000ml water.
Wherein, described coated with resin formula of liquid be 20g resin is dissolved under the conditions of 125 DEG C～135 DEG C 100～
In the organic solvent of 2000g, the molecular weight of resin is 1 ten thousand to 10 ten thousand dalton, and organic solution is industrial acetone, bis-phenol a, industry
In paraffin oil and dimethylbenzene one or more.
The principle of the present invention is as follows:
Polyglutamic acid has larger molecular weight with respect to the fertilizer in fertile core, is therefore wrapped in the polyglutamic of fertile wicking surface
Acid layer can partly block the release aperture of outermost resin coating, reduces the rate of release of fertilizer.With the degraded of polyglutamic acid, fertilizer
Rate of release gradually accelerate.In the polyglutamic acid discharging together with fertilizer, due to the presence of a large amount of carboxylate radicals, can chelate
Free nitrogen, plays the effect in nitrogen storehouse, reduces the release of fertilizer further, it is achieved thereby that super long effective controlled release.In fertile core
The addition of auxiliary material component, serves enhancing fertilizer efficiency and part slow release effect.In addition, polyglutamic acid itself can play plant growing
Regulator, plays the degeneration-resistant effect of growth-promoting.
Beneficial effect: compared with prior art, the present invention has the advantage that
(1) the double-contracting film long-effect slow-release or control-release fertilizer in the present invention, in nutrient slowly-released whole process, all can keep gentle
Rate of release, utilization rate of fertilizer is higher than existing peplos class slow-release or control-release fertilizer.
(2) the nutrient controlled release phase of the double-contracting film long-effect slow-release or control-release fertilizer in the present invention can join according to membrane wrapping thickness and membrane material
Side, to adjust, can be precisely controlled in 1 month to 12 months.
(3) the polyglutamic acid component itself added in the present invention can play plant growth regulator, play growth-promoting and resist
Inverse effect.
Brief description
Fig. 1 is t in embodiment 86Nutrients accumulation release profiles in 25 DEG C of water for the fertilizer (i.e. fertilizer of the present invention).
Specific embodiment
According to following embodiments, the present invention may be better understood.However, it is as it will be easily appreciated by one skilled in the art that real
Apply the content described by example and be merely to illustrate the present invention, and should not be also without limitation on basis described in detail in claims
Invention.
Embodiment 1
Raw material:
The nitrogenous granular urea 850g for 46.3wt%, adjuvant fulvic acid 75g, adjuvant wooden sodium sulfonate 75g, polyethylene
Resin 15g, industrial acetone 1000ml, polyglutamic acid 1g, water 150ml.
Preparation method:
(1) polyvinyl resin and industrial acetone are put into blender, so that material is fully dissolved, prepared polyvinyl resin peplos
Liquid 1000ml；1g polyglutamic acid is dissolved in 150ml water, forms polyglutamic acid solution；Will be auxiliary with 150g for 850g granular urea
Material in stirrer for mixing uniformly, obtains 1000g fertilizer core.
(2) 1000g fertilizer core is loaded fluid bed so as to be in fluidized state, be passed through 50 80 DEG C of hot-air, rotating
Rotary drum fluid-bed interior, uniformly spray on fertiliser granulates in the polyglutamic acid solution having configured.Solution is fast in hot-air
Speed is evaporated, and forms uniform polyglutamic acid peplos in fertile wicking surface.
(3) after the cooling of polyglutamic sorrel, after polyvinyl resin coating liquid is atomized by atomizer, uniformly spray
The particle surface of fluidized state, forms double-contracting film long-effect slow-release or control-release fertilizer after cooling.
Recovery organic solution device can be installed in the air exhausting device end of fluid bed additional to reclaim industrial acetone.
Embodiment 2
Raw material:
Containing n-p2o5-k2The bulky grain compound fertilizer 850g than 15-15-15 for o: the weight, adjuvant dolomite 75g, adjuvant Calcium Carbonate
Powder 75g, epoxy resin 15g, industrial paraffin oil 500ml, bis-phenol a500ml, polyglutamic acid 0.7g, water 150ml.
Preparation method:
(1) epoxy resin and industrial paraffin oil are put into blender with bis-phenol a, so that material is fully dissolved, prepared polyethylene
Coated with resin liquid 1000ml；0.7g polyglutamic acid is dissolved in 150ml water, forms polyglutamic acid solution；850g bulky grain is urinated
Element with 150g adjuvant in stirrer for mixing uniformly, obtains 1000g fertilizer core.
(2) 1000g fertilizer core is loaded fluid bed so as to be in fluidized state, be passed through 50 80 DEG C of hot-air, rotating
Rotary drum fluid-bed interior, uniformly spray on fertiliser granulates in the polyglutamic acid solution having configured.Solution is fast in hot-air
Speed is evaporated, and forms uniform polyglutamic acid peplos in fertile wicking surface.
(3) after the cooling of polyglutamic sorrel, after polyvinyl resin coating liquid is atomized by atomizer, uniformly spray
The particle surface of fluidized state, forms double-contracting film long-effect slow-release or control-release fertilizer after cooling.
Recovery organic solution device can be installed in the air exhausting device end of fluid bed additional to reclaim bis-phenol a.
Embodiment 3
Raw material:
Containing n-p2o5-k2The bulky grain compound fertilizer 850g than 30-10-10 for o: the weight, adjuvant attapulgite 150g, polyurethane
15g, industrial paraffin oil 800ml, dimethylbenzene 200ml, polyglutamic acid 1g, water 150ml.
Preparation method:
(1) polyurethane, industrial paraffin oil and dimethylbenzene are put into blender, so that material is fully dissolved, prepared polyethylene tree
Fat coating liquid 1000ml；1g polyglutamic acid is dissolved in 150ml water, forms polyglutamic acid solution；By 850g granular urea with
150g adjuvant in stirrer for mixing uniformly, obtains 1000g fertilizer core.
(2) 1000g fertilizer core is loaded fluid bed so as to be in fluidized state, be passed through 50 80 DEG C of hot-air, rotating
Rotary drum fluid-bed interior, uniformly spray on fertiliser granulates in the polyglutamic acid solution having configured.Solution is fast in hot-air
Speed is evaporated, and forms uniform polyglutamic acid peplos in fertile wicking surface.
(3) after the cooling of polyglutamic sorrel, after polyvinyl resin coating liquid is atomized by atomizer, uniformly spray
The particle surface of fluidized state, forms double-contracting film long-effect slow-release or control-release fertilizer after cooling.
Recovery organic solution device can be installed in the air exhausting device end of fluid bed additional to reclaim industrial paraffin oil and dimethylbenzene.
Embodiment 4
Raw material:
Containing n-p2o5-k2The bulky grain compound fertilizer 850g than 20-20-20 for o: the weight, adjuvant fulvic acid 75g, adjuvant attapulgite
Powder 75g, polyvinyl resin 15g, industrial acetone 1000ml, polyglutamic acid 1g, water 150ml.
Preparation method:
(1) polyvinyl resin and industrial acetone are put into blender, so that material is fully dissolved, prepared polyvinyl resin peplos
Liquid 1000ml；1g polyglutamic acid is dissolved in 150ml water, forms polyglutamic acid solution；Will be auxiliary with 150g for 850g granular urea
Material in stirrer for mixing uniformly, obtains 1000g fertilizer core.
(2) 1000g fertilizer core is loaded fluid bed so as to be in fluidized state, be passed through 50 80 DEG C of hot-air, rotating
Rotary drum fluid-bed interior, uniformly spray on fertiliser granulates in the polyglutamic acid solution having configured.Solution is fast in hot-air
Speed is evaporated, and forms uniform polyglutamic acid peplos in fertile wicking surface.
(3) after the cooling of polyglutamic sorrel, after polyvinyl resin coating liquid is atomized by atomizer, uniformly spray
The particle surface of fluidized state, forms double-contracting film long-effect slow-release or control-release fertilizer after cooling.
Recovery organic solution device can be installed in the air exhausting device end of fluid bed additional to reclaim industrial acetone.
Embodiment 5
Raw material:
Containing n-p2o5-k2The bulky grain compound fertilizer 850g than 19-7-14 for o: the weight, adjuvant fulvic acid 75g, adjuvant kieselguhr
75g, polyvinyl resin 15g, industrial acetone 1000ml, polyglutamic acid 1g, water 150ml.
Preparation method:
(1) polyvinyl resin and industrial acetone are put into blender, so that material is fully dissolved, prepared polyvinyl resin peplos
Liquid 1000ml；0.7g polyglutamic acid is dissolved in 150ml water, forms polyglutamic acid solution；By 850g granular urea and 150g
Adjuvant in stirrer for mixing uniformly, obtains 1000g fertilizer core.
(2) 1000g fertilizer core is loaded fluid bed so as to be in fluidized state, be passed through 50 80 DEG C of hot-air, rotating
Rotary drum fluid-bed interior, uniformly spray on fertiliser granulates in the polyglutamic acid solution having configured.Solution is fast in hot-air
Speed is evaporated, and forms uniform polyglutamic acid peplos in fertile wicking surface.
(3) after the cooling of polyglutamic sorrel, after polyvinyl resin coating liquid is atomized by atomizer, uniformly spray
The particle surface of fluidized state, forms double-contracting film long-effect slow-release or control-release fertilizer after cooling.
Recovery organic solution device can be installed in the air exhausting device end of fluid bed additional to reclaim industrial acetone.
Embodiment 6
Raw material:
Containing n-p2o5-k2The bulky grain compound fertilizer 850g than 26-10-15 for o: the weight, adjuvant wooden sodium sulfonate 75g, adjuvant silicon
Diatomaceous earth 75g, polyvinyl resin 15g, industrial acetone 1000ml, polyglutamic acid 1g, water 150ml.
Preparation method:
(1) polyvinyl resin and industrial acetone are put into blender, so that material is fully dissolved, prepared polyvinyl resin peplos
Liquid 1000ml；0.7g polyglutamic acid is dissolved in 150ml water, forms polyglutamic acid solution；By 850g granular urea and 150g
Adjuvant in stirrer for mixing uniformly, obtains 1000g fertilizer core.
(2) 1000g fertilizer core is loaded fluid bed so as to be in fluidized state, be passed through 50 80 DEG C of hot-air, rotating
Rotary drum fluid-bed interior, uniformly spray on fertiliser granulates in the polyglutamic acid solution having configured.Solution is fast in hot-air
Speed is evaporated, and forms uniform polyglutamic acid peplos in fertile wicking surface.
(3) after the cooling of polyglutamic sorrel, after polyvinyl resin coating liquid is atomized by atomizer, uniformly spray
The particle surface of fluidized state, forms double-contracting film long-effect slow-release or control-release fertilizer after cooling.
Recovery organic solution device can be installed in the air exhausting device end of fluid bed additional to reclaim industrial acetone.
Embodiment 7
According to national standard gb/t 23348-2009, the fertilizer releasing period of fertilizer is measured.Test fertilizer contains n-
p2o5-k2O: weight is than 20-20-20, adjuvant attapulgite 75g, adjuvant Paris white 75g.According to heretofore described technique system
Double-contracting film long-effect slow-release or control-release fertilizer in the standby present invention.The thickness controlling polyglutamic acid peplos is 0.1mm～0.5mm polyvinyl resin
Membrane wrapping thickness, according to the addition of polyglutamic acid, is controlled to 0.1mm～0.9mm.It is measured using nitrogenous fertilizer as slow release nutrient, will
The fertilizer of preparation extracts in 25 DEG C of hydrostatic, calculates the nutrient of nitrogenous fertilizer according to the formula in national standard gb/t 23348-2009
Acquisition time, result of the test is summarized as follows:
When polyglutamic acid film thickness is 0.1～0.5mm, and when coated with resin thickness is 0.1mm～0.3mm, fertile core nutrient
Acquisition time is 1～3 month；
When polyglutamic acid film thickness is 0.1～0.5mm, and when coated with resin thickness is 0.3mm～0.5mm, fertile core nutrient
Acquisition time is 3～6 months；
When polyglutamic acid film thickness is 0.1～0.5mm, and when coated with resin thickness is 0.5mm～0.7mm, fertile core nutrient
Acquisition time is 6～9 months；
When polyglutamic acid film thickness is 0.1～0.5mm, and when coated with resin thickness is 0.7mm～0.9mm, fertile core nutrient
Acquisition time is 9～12 months.
Embodiment 8
With Oryza sativa L. as experimental subject, rice varieties are Su Xiu 9.Test sets 4 process, t1Process for common fertilizer, be
n-p2o5-k2The treatment group of the bulky grain compound fertilizer of o:20-20-20；t2The tree without polyglutamic acid being obtained for the inventive method
Fat peplos slow-release or control-release fertilizer and polyglutamic acid directly blend the treatment group of use, and consumption is identical with common fertilizer, wherein, polyglutamic acid
Compounding ratio is same as the amount of polyglutamic acid in double-contracting film long-effect slow-release or control-release fertilizer；t3For the inventive method be obtained without resin bag
The treatment group of film process, only has polyglutamic acid coating layer, and consumption is identical with common fertilizer；t4It is by polyglutamic acid, be combined
Fertile, adjuvant is uniformly mixed and made into fertile core, then sprays coated with resin layer through the method for the present invention, and the consumption of each component is all same as double-contracting
The consumption of each component in film long-effect slow-release or control-release fertilizer；t5First process through coated with resin for what the inventive method was obtained, then through polyglutamic
The treatment group of sour peplos, consumption is identical with common fertilizer, and the ratio that wherein polyglutamic acid, resin compound is same as double-contracting film long-effect and delays
Amount in Controlled Release Fertilizer；t6It is double-contracting film long-effect slow-release or control-release fertilizer treatment group, consumption and the common fertilizer according to the embodiment of the present invention 4 preparation
Material is identical, and in fertile core, fertilizer is n-p2o5-k2The bulky grain compound fertilizer of o:20-20-20；t7It is in t6Subtract on the basis of total usage amount
Few 20% treatment group.Common fertilizer is applied custom point base manure by peasant and is topdressed, and other fertilizer are applied in rice terrace recession of turning over,
Through raking the soil level fertilizer and mixing with soil.Each processes 3 repetitions, zone leader 8m, wide 3m, plot area 24m2, cell surrounding sets
Put protection row.The data of gained is as shown in the table.
Table 1. respectively processes the impact of the Yield and its components factor to Oryza sativa L.
t6With t1Compare and increased production 51.1% it is seen that the effect of double-contracting film long-effect slow-release or control-release fertilizer is notable.t3With t1Compare, produce
The only small size lifting of amount, because there is not the slow releasing function of coated with resin layer, nutrients release is rapid.t2、t4、t5With t1Compare,
Yield also improves, but much worse than t6Effect, just meeting and resin are described when polyglutamic acid is applied with capsule form
Coating layer produces cooperative effect, and the order of both peplos should be polyglutamic acid layer coated with resin layer from the inside to the outside.
As can be seen here, the synergism of exactly polyglutamic acid internal layer peplos and resin outer layer peplos, extends fertilizer efficiency, improves
The utilization rate of fertilizer is so that the release of fertilizer nutrient more conforms to the needs of plant growth so that experiment Oryza sativa L. is in effective fringe
Number, mass of 1000 kernel and yield aspect are all enhanced.
Claims (9)
1. a kind of double-contracting film long-effect slow-release or control-release fertilizer is it is characterised in that it includes fertile core, polyglutamic acid peplos and resin from the inside to the outside
Peplos；
Wherein, polyglutamic acid coating layer quality accounts for the one thousandth of gross mass one of to percentage, and coated with resin layer quality accounts for total matter
One of percentage of amount is to 1/10th.
2. a kind of double-contracting film long-effect slow-release or control-release fertilizer according to claim 1 is it is characterised in that fertile core fertilizer releasing period is 1
～12 months.
3. a kind of double-contracting film long-effect slow-release or control-release fertilizer according to claim 2 it is characterised in that
When polyglutamic acid film thickness is 0.1～0.5mm, and when coated with resin thickness is 0.1mm～0.3mm, fertile core nutrients release
Phase is 1～3 month；
When polyglutamic acid film thickness is 0.1～0.5mm, and when coated with resin thickness is 0.3mm～0.5mm, fertile core nutrients release
Phase is 3～6 months；
When polyglutamic acid film thickness is 0.1～0.5mm, and when coated with resin thickness is 0.5mm～0.7mm, fertile core nutrients release
Phase is 6～9 months；
When polyglutamic acid film thickness is 0.1～0.5mm, and when coated with resin thickness is 0.7mm～0.9mm, fertile core nutrients release
Phase is 9～12 months.
4. a kind of double-contracting film long-effect slow-release or control-release fertilizer according to claim 1 is it is characterised in that described fertile core is by main fertilizer
Material is constituted with adjuvant, and described main fertilizer includes any one or a few the combination in nitrogenous fertilizer, phosphate fertilizer and potash fertilizer；Described is auxiliary
Expect for any one or a few the group in fulvic acid, wooden sodium sulfonate, dolomite, Paris white, attapulgite and kieselguhr
Close.
5. a kind of double-contracting film long-effect slow-release or control-release fertilizer according to claim 1 is it is characterised in that described polyglutamic acid bag
Film, is to be evaporated prepared by the coating liquid containing polyglutamic acid, wherein, the mean molecule quantity of described polyglutamic acid is 5-3000kda, institute
Stating polyglutamic acid is polyglutamic acid sterling, polyglutamate sterling, the fermentation culture medium comprising polyglutamic acid, polyglutamic acid solution
With any one or a few the combination in the wettable powder containing polyglutamic acid.
6. a kind of double-contracting film long-effect slow-release or control-release fertilizer according to claim 1 is it is characterised in that in described coated with resin,
Resin used is one or more of polyvinyl resin, epoxy resin and polyurethane.
7. a kind of preparation method of the double-contracting film long-effect slow-release or control-release fertilizer described in claim 1 is it is characterised in that it includes walking as follows
Rapid:
(1), in will be rotary drum fluid-bed for the addition of fertile core, it be passed through 50-80 DEG C of air, rotary drum fluid-bed interior rotate, poly- paddy will be contained
The coating liquid of propylhomoserin sprays on fertiliser granulates, and coating liquid is evaporated in hot-air, forms the first tunic in fertile wicking surface and gathers
Glutamic acid peplos；
(2), after the fertilizer cooling of gained in step (1), coated with resin liquid is sprayed on particle surface, after cooling, forms the second layer
Film is coated with resin.
8. preparation method according to claim 7 it is characterised in that the described peplos formula of liquid containing polyglutamic acid be by
1g polyglutamic acid is dissolved in 50ml to 1000ml water.
9. preparation method according to claim 7 is it is characterised in that described coated with resin formula of liquid is by 20g resin
In the organic solvent being dissolved in 100～2000g under the conditions of 125 DEG C～135 DEG C, the molecular weight of resin is 1 ten thousand to 10 ten thousand dalton,
Organic solution is industrial acetone, bis-phenol a, industrial paraffin oil and one or more of dimethylbenzene.
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|---|---|---|---|---|
| CN101003454B (en) * | 2006-01-19 | 2012-05-30 | 南京理工大学 | Composite sulfur enveloped slow release fertilizer |
| CN100465136C (en) * | 2006-12-31 | 2009-03-04 | 沈阳农业大学 | Film coated control release composite fertilizer special for regetables and its making method |
| CN101357872A (en) * | 2008-09-24 | 2009-02-04 | 杨晓玲 | Membrane wrapping sustained-release urea and producing method thereof |
| CN102875235A (en) * | 2012-10-17 | 2013-01-16 | 中国农业科学院农业资源与农业区划研究所 | Coated synergistic nitrogen fertilizer composition and preparation method thereof |
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2014
- 2014-09-03 CN CN201410447354.0A patent/CN104163728B/en active Active
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| CN104163728A (en) | 2014-11-26 |
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