CN106396896A - Special controlled-release fertilizer for lotus roots and preparation method thereof - Google Patents
Special controlled-release fertilizer for lotus roots and preparation method thereof Download PDFInfo
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- CN106396896A CN106396896A CN201610767263.4A CN201610767263A CN106396896A CN 106396896 A CN106396896 A CN 106396896A CN 201610767263 A CN201610767263 A CN 201610767263A CN 106396896 A CN106396896 A CN 106396896A
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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
- C05B—PHOSPHATIC FERTILISERS
- C05B7/00—Fertilisers based essentially on alkali or ammonium orthophosphates
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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
- C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
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- Pest Control & Pesticides (AREA)
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Abstract
The invention discloses a special controlled-release fertilizer for lotus roots and a preparation method thereof. The preparation method comprises the following steps of preparing a fertilizer core by urea, potassium chloride, calcium phosphate, a trace element fertilizer, an inhibitor and a dispersant; performing inner coating treatment on the fertilizer core by an inner coating film agent which is prepared from polylactic acid, polyethylene glycol and ethyl alcohol; performing outer coating treatment on the fertilizer core by an outer coating film agent which is prepared from polyacrylate, ethylene propylene diene monomer, modified starch, acetone and water, so as to obtain the special controlled-release fertilizer for the lotus roots. Compared with the prior art, the special controlled-release fertilizer has the advantages that the nutrient elements in the fertilizer are rich, the utilization rate of a nitrogen fertilizer is high, the controlled-release property is good, and the nutrient requirement of the lotus root in each growth period is met; the outer coating can be recycled, so that the environment-friendly effect is realized; the inner coating can be completely degraded, so that the danger to surrounding environment is avoided.
Description
Technical field
The present invention relates to Controlled Release Fertilizer field is and in particular to a kind of Rhizoma Nelumbiniss special-purpose control-release fertilizer and preparation method thereof.
Background technology
The required nutrient substance in growth and development process of Rhizoma Nelumbiniss, is on the one hand derived from the photosynthesis of Folium Nelumbinis；The opposing party
Face comes from soil, and in soil, original fertilizer is limited (inclusion base manure), and the growth promoter with plant can be less and less, to the greatest extent
The feces of pipe fish and residual bait can be that Rhizoma Nelumbinis provide a certain amount of nutrient, but compared with the growth demand of Rhizoma Nelumbinis be little it is therefore necessary to
Topdress in time.Rhizoma Nelumbiniss period of duration is long, typically topdresses 2-3 time.Water in field is bled off, so that fertilizer sucks in water, then before applying fertilizer every time
Pour water again to original depth.In deep water Rhizoma Nelumbinis Tanaka, fertilizer is easy to run off, it is impossible to direct applicating liquid fertilizer, to take solid fertilising
Material method, i.e. heavy dressing barnyard manure or grass green manure, and imbed in mud.Topdress when using chemical fertilizer, first chemical fertilizer be sufficiently mixed with river silt,
Make fertile walk, then apply Rhizoma Nelumbinis field.Current Rhizoma Nelumbiniss fertilising presence is topdressed often, and fertilization mode is complicated, and fertilizer is easy to run off, to ring
Border pollutes, and situations such as Rhizoma Nelumbiniss absorption of nutrient ingredients is reciprocity, is current Rhizoma Nelumbiniss fertilizer urgent problem.
Release and release control fertilizer is the inorganic matters of one layer of low aqueous solubility of surface-coated with granulated fertilizer (simple substance or compound fertilizer) as core
Matter or organic polymer, or applied chemistry method by fertilizer equably incorporate decomposition in the polymer, formed porous network body
System, and promote or delay the release of nutrient according to the degraded situation of polymer, so that the deliverability of nutrient and plant growth is sent out
The need fertilizer educated requires a kind of new-type fertilizer of consistent coordination.The advantage of Controlled Release Fertilizer is：Fertilizer nutrient can be greatly enhanced
Utilization rate.Generally Controlled Release Fertilizer improves 10%-30% than instant nitrogenousfertilizer utilization rate；Eliminate loss in soil for the nutrient, reduce
Dose, mitigates the pollution to environment for the fertilising；Promote the innovation of fertilizer practice, economize on fertilizer, time and labour saving, improve yield, increase
Plus farmers' income.Controlled Release Fertilizer general in the market mostly is terrestrial plant and develops, and the water plant such as Rhizoma Nelumbiniss is due to raw in water
Long, Controlled Release Fertilizer using being not only subject to water, illumination, temperature, be also subject to individual ion, a microorganism etc. in water to be affected, complexity
More than terrestrial plant.And the outer layer organic or inorganic coating palliating degradation degree of Controlled Release Fertilizer differs surely complete and is absorbed, so
Develop one kind can controlled release, the outer layer coating convenient Controlled Release Fertilizer reclaiming again, is current water plant, especially Rhizoma Nelumbiniss fertilizer field
Urgent problem.
Content of the invention
It is an object of the invention to provide a kind of Rhizoma Nelumbiniss special-purpose control-release fertilizer, can delay required in controlled release Rhizoma Nelumbiniss growth course
Nutrient substance, and the fertilizer friendly to surrounding enviroment.By carbamide, potassium chloride, calcium phosphate, trace element fertilizer, inhibitor, dispersion
Agent, make fertile core after, using inner investment agent, fertile core is wrapped inside with clothing and processes, reuses outsourcing membrane outer coatings are carried out to fertile core
Process, special Rhizoma Nelumbiniss Controlled Release Fertilizer is obtained to realize this purpose.
The present invention is achieved by the following technical programs：
A kind of Rhizoma Nelumbiniss special-purpose control-release fertilizer, is made up of following components in parts by weight：
Carbamide 140-200 part, potassium chloride 120-170 part, calcium phosphate 90-140 part, trace element fertilizer 8-15 part, inhibitor
5-9 part, dispersant 6-10 part, inner investment agent 9-23 part, outsourcing membrane 14-32 part.
Further, described inner investment agent is grouped into by the group of following weight portion：Polylactic acid 4-10 part, Polyethylene Glycol 3-
9 parts, ethanol 2-4 part.
Further, described outsourcing membrane is grouped into by the group of following weight portion：Polyacrylate 6-15 part, ternary second
Third rubber 1-4 part, modified starch 3-5 part, acetone 2-4 part, water 2-4 part.
Further, described trace element is grouped into by the group of following weight portion：Borax 3-6 part, zinc sulfate 3-5 part,
Manganese sulfate 2-4 part.
Further, described inhibitor is 3,4- dimethyl pyrazole phosphate.
Further, described dispersant is polyvinyl lactam.
Further, described molecular weight polyethylene glycol be 2000-5000, polyacrylate molecular weight be 500-2000,
Polylactic acid molecule amount is 3000-6000.
A kind of its preparation method of Rhizoma Nelumbiniss special-purpose control-release fertilizer, comprises the following steps：
1) preparation of fertile core
Proportionally weigh carbamide, potassium chloride, calcium phosphate, trace element fertilizer, after pulverizing and sieving, add inhibitor, dispersion
Agent, stirs, conventionally pelletize in comminutor, obtains fertile core.
2) coating agent preparation
Proportionally weigh polylactic acid, Polyethylene Glycol, ethanol, according to coating process, prepared inner investment agent；Proportionally claim
Take polyacrylate, ethylene propylene diene rubber, ethylene propylene diene rubber, modified starch, acetone, water, make outsourcing according to coating process
Membrane.
3) coating
Interior coating：Fertile core is put in fluidized-bed coating machine, inner investment agent is sprayed on the fertile core rolling, divulge information dry simultaneously
Dry, after forming one layer of uniform separation membrane to outside granule, solidify 4～6min；Repeat above-mentioned coating steps until interior coating materials make
It is finished.In coating process, temperature control is at 40-60 DEG C.
Outer coatings：After interior coating terminates, spray outsourcing membrane, aeration-drying simultaneously, form one layer to outside granule uniformly
After separation membrane, solidify 4～6min, repeat above-mentioned coating steps until outer coatings agent has used, be cooled to room temperature, obtain fertilizer.
Wherein in coating process, temperature control is at 40-60 DEG C.
Further, step 1) described in sieve for cross 150-200 mesh sieve.
Further, step 2) described in coating process be：Needed raw material is added to after reactor, is warming up to 60-
80 DEG C, stirring insulation 3-5h, near room temperature.
Further, step 3) described in coating process, temperature control is at 40-60 DEG C.
The beneficial effects of the present invention is：
1st, in fertilizer, nutrient is abundant
By being mixedly configured into after fertile core carbamide, potassium chloride, calcium phosphate, trace element fertilizer, contain abundant in fertile core
N P and K and more trace element, can meet the demand of Rhizoma Nelumbiniss growth.
2nd, utilization rate of nitrogen fertilizer is high
Carbamide is the maximum nitrogenous fertilizer of the current consumption of China, and it also forms a large amount of after being manured into soil through biochemical hydrolysis effect
Ammonium nitrogen, the problem that conventional ammonium nitrogen has unstable feature, easily changes into nitrate nitrogen and produce loss.The work of nitrification inhibitor
It is to suppress the activity of the microorganism such as nitrite bacteria in soil with mechanism, by blocking and suppressing ammonium nitrogen to nitrate nitrogen
Conversion, extend retention time in soil for the ammonium, thereby reduce nitrate nitrogen can not by soil preserve and occur leaching damage
Become estranged occur Denitrification and be likely to result in nitrous oxide gas discharge loss.
3rd, fertilizer has controlled capability
When fertilizer uses in water, outer coatings, in the presence of water and microorganism, are gradually degraded, but due to polyacrylate
Stability, in outer coatings other components degraded after, formed micro channel, be conducive to the entrance of moisture and microorganism, can connect
Contact interior coating；By polylactic acid, Polyethylene Glycol is used as inner investment agent, after fully wrapped around for fertile core, using moisture, temperature,
The decomposition of the internal coating such as microorganism, after interior coating is progressively degraded, fertilizer in fertile core is discharged, meets each period of Rhizoma Nelumbiniss
Demand to nutrient, due to the difference of interior outer coatings and surrounding moisture content concentration difference, in coating, dissolubility nutrient substance will ooze
Appear coating, be distributed in surrounding enviroment.The group of inner investment agent simultaneously is divided into Wholly-degradable material, and the material after degraded is crop
Absorbable nutrient, will not bring injury to surrounding enviroment.
4th, outer coatings are recyclable, environmental protection
Polyacrylate has excellent film property, cementability, gloss retention, weatherability, corrosion resistant candle property and pliability, in water
In more stable, not degradable；After interior coating and fertilizer release finish, the polyacrylate in outer coatings still can compare surely
Fixed is present in water, when Rhizoma Nelumbiniss are plucked, can carry out the recovery of outer coatings, can repeat to recycle, then be prepared into outer coatings；With
When outer coatings in also have ethylene propylene diene rubber, there is certain water absorption, so that outer coatings is expanded, surface area becomes big, in fertilizer
After releasing, can be suspended on water surface, beneficial to recovery.
Specific embodiment
With reference to embodiments technical scheme is further described, but claimed scope is not limited to
In described.
Embodiment 1
Formula：By weight, 140 parts of carbamide, 120 parts of potassium chloride, 90 parts of calcium phosphate, 8 parts of trace element fertilizer, 3,4-
5 parts of dimethyl pyrazole phosphate, 6 parts of polyvinyl lactam, 9 parts of inner investment agent, 14 parts of outsourcing membrane.Wherein trace element fertilizer is by boron
3 parts of sand, 3 parts of zinc sulfate, 2 parts of compositions of manganese sulfate；Wherein inner investment agent is by 4 parts of the polylactic acid of weight portion, 3 parts of Polyethylene Glycol, second
2 parts of compositions of alcohol；Outsourcing membrane is by 6 parts of the polyacrylate of weight portion, 1 part of ethylene propylene diene rubber, 3 parts of modified starch, acetone 2
Part, 2 parts of compositions of water；Wherein molecular weight polyethylene glycol is 2000, and polyacrylate molecular weight is 500, and polylactic acid molecule amount is
3000.
Preparation method：1) preparation of fertile core
Proportionally add carbamide, potassium chloride, calcium phosphate, trace element fertilizer, after pulverizing 150 mesh sieves, add 3,4- bis-
Methylpyrazole phosphate, polyvinyl lactam, stir, conventionally pelletize in comminutor, obtain fertile core.
2) coating agent preparation
Proportionally weigh polylactic acid, Polyethylene Glycol, ethanol, according to coating process, prepared inner investment agent；Proportionally claim
Take polyacrylate, ethylene propylene diene rubber, modified starch, acetone, water, according to coating process, make outsourcing membrane.Wherein peplos
Technique, inner investment technique is：Needed raw material is added to after reactor, is warming up to 80 DEG C, stirring insulation 5h, insulation is finished, cooling
To room temperature；Outsourcing membrane process is that needed raw material is added to after reactor, is warming up to 65 DEG C, stirring insulation 5h, and insulation is finished, cooling
To room temperature, stand-by
3) coating
Interior coating：Fertile core is put in fluidized-bed coating machine, inner investment agent is sprayed on the fertile core rolling, divulge information dry simultaneously
Dry, after forming one layer of uniform separation membrane to outside granule, solidify 4～6min；Repeat above-mentioned coating steps until interior coating materials make
It is finished.In coating process, temperature control is at 40-60 DEG C.
Outer coatings：After interior coating terminates, spray outsourcing membrane, aeration-drying simultaneously, form one layer to outside granule uniformly
After separation membrane, solidify 4～6min, repeat above-mentioned coating steps until outer coatings agent has used, be cooled to room temperature, obtain fertilizer.
Wherein in coating process, temperature control is at 40-60 DEG C.
Embodiment 2
Formula：By weight, 200 parts of carbamide, 170 parts of potassium chloride, 140 parts of calcium phosphate, 15 parts of trace element fertilizer, 3,
9 parts of 4- dimethyl pyrazole phosphate, 10 parts of polyvinyl lactam, 23 parts of inner investment agent, 32 parts of outsourcing membrane.Wherein trace element
Fertilizer is made up of 6 parts of Borax, 5 parts of zinc sulfate, 4 parts of manganese sulfate；Wherein inner investment agent is by 10 parts of the polylactic acid of weight portion, Polyethylene Glycol
9 parts, 4 parts of compositions of ethanol；Outsourcing membrane by 15 parts of the polyacrylate of weight portion, 4 parts of ethylene propylene diene rubber, 5 parts of modified starch,
4 parts of acetone, 4 parts of compositions of water；Wherein molecular weight polyethylene glycol is 5000, and polyacrylate molecular weight is 2000, polylactic acid molecule
Measure as 6000.
Preparation method：1) preparation of fertile core
Proportionally add carbamide, potassium chloride, calcium phosphate, trace element fertilizer, after pulverizing 200 mesh sieves, add 3,4- bis-
Methylpyrazole phosphate, polyvinyl lactam, stir, conventionally pelletize in comminutor, obtain fertile core.
2) coating agent preparation
Proportionally weigh polylactic acid, Polyethylene Glycol, ethanol, according to coating process, prepared inner investment agent；Proportionally claim
Take polyacrylate, ethylene propylene diene rubber, modified starch, acetone, water, according to coating process, make outsourcing membrane.Wherein peplos
Technique, inner investment technique is：Needed raw material is added to after reactor, is warming up to 60 DEG C, stirring insulation 3h, insulation is finished, cooling
To room temperature；Outsourcing membrane process is that needed raw material is added to after reactor, is warming up to 80 DEG C, stirring insulation 3h, and insulation is finished, cooling
To room temperature, stand-by.
3) coating
Interior coating：Fertile core is put in fluidized-bed coating machine, inner investment agent is sprayed on the fertile core rolling, divulge information dry simultaneously
Dry, after forming one layer of uniform separation membrane to outside granule, solidify 4～6min；Repeat above-mentioned coating steps until interior coating materials make
It is finished.In coating process, temperature control is at 40-60 DEG C.
Outer coatings：After interior coating terminates, spray outsourcing membrane, aeration-drying simultaneously, form one layer to outside granule uniformly
After separation membrane, solidify 4～6min, repeat above-mentioned coating steps until outer coatings agent has used, be cooled to room temperature, obtain fertilizer.
Wherein in coating process, temperature control is at 40-60 DEG C.
Embodiment 3
Formula：By weight, 180 parts of carbamide, 150 parts of potassium chloride, 120 parts of calcium phosphate, 13 parts of trace element fertilizer, 3,
6 parts of 4- dimethyl pyrazole phosphate, 8 parts of polyvinyl lactam, 17 parts of inner investment agent, 26 parts of outsourcing membrane.Wherein trace element fertilizer
It is made up of 5 parts of Borax, 5 parts of zinc sulfate, 3 parts of manganese sulfate；Wherein inner investment agent is by 7 parts of the polylactic acid of weight portion, Polyethylene Glycol 7
Part, 3 parts of compositions of ethanol；Outsourcing membrane by 13 parts of the polyacrylate of weight portion, 2 parts of ethylene propylene diene rubber, 4 parts of modified starch,
3 parts of acetone, 4 parts of compositions of water；Wherein molecular weight polyethylene glycol is 4000, and polyacrylate molecular weight is 1000, polylactic acid molecule
Measure as 4000.
Preparation method：1) preparation of fertile core
Proportionally add carbamide, potassium chloride, calcium phosphate, trace element fertilizer, after pulverizing 200 mesh sieves, add 3,4- bis-
Methylpyrazole phosphate, polyvinyl lactam, stir, conventionally pelletize in comminutor, obtain fertile core.
2) coating agent preparation
Proportionally weigh polylactic acid, Polyethylene Glycol, ethanol, according to coating process, prepared inner investment agent；Proportionally claim
Take polyacrylate, ethylene propylene diene rubber, modified starch, acetone, water, according to coating process, make outsourcing membrane.Wherein peplos
Technique, inner investment technique is：Needed raw material is added to after reactor, is warming up to 70 DEG C, stirring insulation 4h, insulation is finished, cooling
To room temperature；Outsourcing membrane process is that needed raw material is added to after reactor, is warming up to 70 DEG C, stirring insulation 3h, and insulation is finished, cooling
To room temperature, stand-by.
3) coating
Interior coating：Fertile core is put in fluidized-bed coating machine, inner investment agent is sprayed on the fertile core rolling, divulge information dry simultaneously
Dry, after forming one layer of uniform separation membrane to outside granule, solidify 4～6min；Repeat above-mentioned coating steps until interior coating materials make
It is finished.In coating process, temperature control is at 40-60 DEG C.
Outer coatings：After interior coating terminates, spray outsourcing membrane, aeration-drying simultaneously, form one layer to outside granule uniformly
After separation membrane, solidify 4～6min, repeat above-mentioned coating steps until outer coatings agent has used, be cooled to room temperature, obtain fertilizer.
Wherein in coating process, temperature control is at 40-60 DEG C.
Embodiment 4
Formula：By weight, 150 parts of carbamide, 140 parts of potassium chloride, 140 parts of calcium phosphate, 11 parts of trace element fertilizer, 3,
7 parts of 4- dimethyl pyrazole phosphate, 6 parts of polyvinyl lactam, 12 parts of inner investment agent, 30 parts of outsourcing membrane.Wherein trace element fertilizer
It is made up of 4 parts of Borax, 4 parts of zinc sulfate, 3 parts of manganese sulfate；Wherein inner investment agent is by 5 parts of the polylactic acid of weight portion, Polyethylene Glycol 5
Part, 2 parts of compositions of ethanol；Outsourcing membrane by 14 parts of the polyacrylate of weight portion, 4 parts of ethylene propylene diene rubber, 5 parts of modified starch,
3 parts of acetone, 3 parts of compositions of water；Wherein molecular weight polyethylene glycol is 4500, and polyacrylate molecular weight is 1500, polylactic acid molecule
Measure as 5000.
Preparation method：1) preparation of fertile core
Proportionally add carbamide, potassium chloride, calcium phosphate, trace element fertilizer, after pulverizing 150 mesh sieves, add 3,4- bis-
Methylpyrazole phosphate, polyvinyl lactam, stir, conventionally pelletize in comminutor, obtain fertile core.
2) coating agent preparation
Proportionally weigh polylactic acid, Polyethylene Glycol, ethanol, according to coating process, prepared inner investment agent；Proportionally claim
Take polyacrylate, ethylene propylene diene rubber, modified starch, acetone, water, according to coating process, make outsourcing membrane.Wherein peplos
Technique, inner investment technique is：Needed raw material is added to after reactor, is warming up to 60 DEG C, stirring insulation 5h, insulation is finished, cooling
To room temperature；Outsourcing membrane process is that needed raw material is added to after reactor, is warming up to 80 DEG C, stirring insulation 3h, and insulation is finished, cooling
To room temperature, stand-by.
3) coating
Interior coating：Fertile core is put in fluidized-bed coating machine, inner investment agent is sprayed on the fertile core rolling, divulge information dry simultaneously
Dry, after forming one layer of uniform separation membrane to outside granule, solidify 4～6min；Repeat above-mentioned coating steps until interior coating materials make
It is finished.In coating process, temperature control is at 40-60 DEG C.
Outer coatings：After interior coating terminates, spray outsourcing membrane, aeration-drying simultaneously, form one layer to outside granule uniformly
After separation membrane, solidify 4～6min, repeat above-mentioned coating steps until outer coatings agent has used, be cooled to room temperature, obtain fertilizer.
Wherein in coating process, temperature control is at 40-60 DEG C.
Embodiment 5
Formula：By weight, 180 parts of carbamide, 130 parts of potassium chloride, 100 parts of calcium phosphate, 9 parts of trace element fertilizer, 3,4-
5 parts of dimethyl pyrazole phosphate, 7 parts of polyvinyl lactam, 10 parts of inner investment agent, 17 parts of outsourcing membrane.Wherein trace element fertilizer by
3 parts of Borax, 3 parts of zinc sulfate, 3 parts of compositions of manganese sulfate；Wherein inner investment agent by 4 parts of the polylactic acid of weight portion, 3 parts of Polyethylene Glycol,
3 parts of compositions of ethanol；Outsourcing membrane is by 8 parts of the polyacrylate of weight portion, 2 parts of ethylene propylene diene rubber, 3 parts of modified starch, acetone 2
Part, 2 parts of compositions of water；Wherein molecular weight polyethylene glycol is 3500, and polyacrylate molecular weight is 800, and polylactic acid molecule amount is
4500.
Preparation method：1) preparation of fertile core
Proportionally add carbamide, potassium chloride, calcium phosphate, trace element fertilizer, after pulverizing 200 mesh sieves, add 3,4- bis-
Methylpyrazole phosphate, polyvinyl lactam, stir, conventionally pelletize in comminutor, obtain fertile core.
2) coating agent preparation
Proportionally weigh polylactic acid, Polyethylene Glycol, ethanol, according to coating process, prepared inner investment agent；Proportionally claim
Take polyacrylate, ethylene propylene diene rubber, modified starch, acetone, water, according to coating process, make outsourcing membrane.Wherein peplos
Technique, inner investment technique is：Needed raw material is added to after reactor, is warming up to 60 DEG C, stirring insulation 3h, insulation is finished, cooling
To room temperature；Outsourcing membrane process is that needed raw material is added to after reactor, is warming up to 60 DEG C, stirring insulation 3h, and insulation is finished, cooling
To room temperature, stand-by.
3) coating
Interior coating：Fertile core is put in fluidized-bed coating machine, inner investment agent is sprayed on the fertile core rolling, divulge information dry simultaneously
Dry, after forming one layer of uniform separation membrane to outside granule, solidify 4～6min；Repeat above-mentioned coating steps until interior coating materials make
It is finished.In coating process, temperature control is at 40-60 DEG C.
Outer coatings：After interior coating terminates, spray outsourcing membrane, aeration-drying simultaneously, form one layer to outside granule uniformly
After separation membrane, solidify 4～6min, repeat above-mentioned coating steps until outer coatings agent has used, be cooled to room temperature, obtain fertilizer.
Wherein in coating process, temperature control is at 40-60 DEG C.
Embodiment 6
Formula：By weight, 160 parts of carbamide, 170 parts of potassium chloride, 130 parts of calcium phosphate, 11 parts of trace element fertilizer, 3,
9 parts of 4- dimethyl pyrazole phosphate, 6 parts of polyvinyl lactam, 15 parts of inner investment agent, 22 parts of outsourcing membrane.Wherein trace element fertilizer
It is made up of 4 parts of Borax, 3 parts of zinc sulfate, 2 parts of manganese sulfate；Wherein inner investment agent is by 8 parts of the polylactic acid of weight portion, Polyethylene Glycol 5
Part, 2 parts of compositions of ethanol；Outsourcing membrane by 10 parts of the polyacrylate of weight portion, 3 parts of ethylene propylene diene rubber, 3 parts of modified starch,
3 parts of acetone, 3 parts of compositions of water；Wherein molecular weight polyethylene glycol is 2500, and polyacrylate molecular weight is 1800, polylactic acid molecule
Measure as 5500.
Preparation method：1) preparation of fertile core
Proportionally add carbamide, potassium chloride, calcium phosphate, trace element fertilizer, after pulverizing 150 mesh sieves, add 3,4- bis-
Methylpyrazole phosphate, polyvinyl lactam, stir, conventionally pelletize in comminutor, obtain fertile core.
2) coating agent preparation
Proportionally weigh polylactic acid, Polyethylene Glycol, ethanol, according to coating process, prepared inner investment agent；Proportionally claim
Take polyacrylate, ethylene propylene diene rubber, modified starch, acetone, water, according to coating process, make outsourcing membrane.Wherein peplos
Technique, inner investment technique is：Needed raw material is added to after reactor, is warming up to 80 DEG C, stirring insulation 5h, insulation is finished, cooling
To room temperature；Outsourcing membrane process is that needed raw material is added to after reactor, is warming up to 80 DEG C, stirring insulation 5h, and insulation is finished, cooling
To room temperature, stand-by.
3) coating
Interior coating：Fertile core is put in fluidized-bed coating machine, inner investment agent is sprayed on the fertile core rolling, divulge information dry simultaneously
Dry, after forming one layer of uniform separation membrane to outside granule, solidify 4～6min；Repeat above-mentioned coating steps until interior coating materials make
It is finished.In coating process, temperature control is at 40-60 DEG C.
Outer coatings：After interior coating terminates, spray outsourcing membrane, aeration-drying simultaneously, form one layer to outside granule uniformly
After separation membrane, solidify 4～6min, repeat above-mentioned coating steps until outer coatings agent has used, be cooled to room temperature, obtain fertilizer.
Wherein in coating process, temperature control is at 40-60 DEG C.
Through statistics, the Controlled Release Fertilizer obtained by the embodiment of the present invention, the fertilizer releasing period of fertilizer is 120-130 days, using knot
Shu Hou, coating imbibition, floatability is on the water surface.
Claims (10)
1. a kind of Rhizoma Nelumbiniss special-purpose control-release fertilizer it is characterised in that：It is made up of following components in parts by weight：Carbamide 140-200 part, chlorination
Potassium 120-170 part, calcium phosphate 90-140 part, trace element fertilizer 8-15 part, inhibitor 5-9 part, dispersant 6-10 part, inner investment agent
9-23 part, outsourcing membrane 14-32 part.
2. a kind of Rhizoma Nelumbiniss special-purpose control-release fertilizer according to right 1 it is characterised in that：Inner investment agent is by the component of following weight portion
Composition：Polylactic acid 4-10 part, Polyethylene Glycol 3-9 part, ethanol 2-4 part.
3. a kind of Rhizoma Nelumbiniss special-purpose control-release fertilizer according to right 1 it is characterised in that：Outsourcing membrane is by the component of following weight portion
Composition：Polyacrylate 6-15 part, ethylene propylene diene rubber 1-4 part, modified starch 3-5 part, acetone 2-4 part, water 2-4 part.
4. a kind of Rhizoma Nelumbiniss special-purpose control-release fertilizer according to right 1 it is characterised in that：Inhibitor is 3,4- dimethyl pyrazole phosphorus
Hydrochlorate.
5. a kind of Rhizoma Nelumbiniss special-purpose control-release fertilizer according to right 1 it is characterised in that：Dispersant is polyvinyl lactam.
6. a kind of Rhizoma Nelumbiniss special-purpose control-release fertilizer according to right 1 it is characterised in that：Molecular weight polyethylene glycol be 2000-5000,
Polyacrylate molecular weight is 500-2000, polylactic acid molecule amount is 3000-6000.
7. a kind of its preparation method of Rhizoma Nelumbiniss special-purpose control-release fertilizer it is characterised in that：Comprise the following steps：
1) preparation of fertile core
Proportionally weigh carbamide, potassium chloride, calcium phosphate, trace element fertilizer, after pulverizing and sieving, add inhibitor, dispersant, stir
Mix uniformly, conventionally pelletize in comminutor, obtain fertile core.
2) coating agent preparation
Proportionally weigh polylactic acid, Polyethylene Glycol, ethanol, according to coating process, prepared inner investment agent；Proportionally weigh poly-
Acrylate, ethylene propylene diene rubber, ethylene propylene diene rubber, modified starch, acetone, water, make outsourcing membrane according to coating process.
3) coating
Interior coating：Fertile core is put in fluidized-bed coating machine, sprinkling inner investment agent on the fertile core rolling, aeration-drying simultaneously,
After forming one layer of uniform separation membrane to outside granule, solidify 4～6min；Repeat above-mentioned coating steps until interior coating materials use
Complete.In coating process, temperature control is at 40-60 DEG C.
Outer coatings：After interior coating terminates, spray outsourcing membrane, aeration-drying simultaneously, form one layer of uniform separation to outside granule
After film, solidify 4～6min, repeat above-mentioned coating steps until outer coatings agent has used, be cooled to room temperature, obtain fertilizer.Wherein
In coating process, temperature control is at 40-60 DEG C.
8. a kind of Rhizoma Nelumbiniss special-purpose control-release fertilizer according to right 7 its preparation method it is characterised in that：Described step 1) in mistake
Sieving was 150-200 mesh sieve.
9. a kind of Rhizoma Nelumbiniss special-purpose control-release fertilizer according to right 7 its preparation method it is characterised in that：Described step 2) in
Coating process is：Needed raw material is added to after reactor, is warming up to 60-80 DEG C, stirring insulation 3-5h, near room temperature.
10. a kind of Rhizoma Nelumbiniss special-purpose control-release fertilizer according to right 7 its preparation method it is characterised in that：Described step 3) in
In coating process, temperature control is at 40-60 DEG C.
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| CN107417412A (en) * | 2017-08-30 | 2017-12-01 | 太仓市林港农场专业合作社 | A kind of vegetable cultivation special efficient is sustained selenium-enriched fertilizer |
| CN107445699A (en) * | 2017-08-30 | 2017-12-08 | 太仓市林港农场专业合作社 | A kind of preparation method of vegetable cultivation special efficient slow release fertilizer |
| CN107522545A (en) * | 2017-08-30 | 2017-12-29 | 太仓市林港农场专业合作社 | A kind of preparation method of vegetable cultivation special efficient sustained release selenium-enriched fertilizer |
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