CN105777364A - Long-actingselenium-enriched coated slow-release compound fertilizer for rice planting and preparation method thereof - Google Patents
Long-actingselenium-enriched coated slow-release compound fertilizer for rice planting and preparation method thereof Download PDFInfo
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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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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
- C05G3/80—Soil conditioners
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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
- 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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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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Abstract
The invention provides a long-actingselenium-enriched coated slow-release compound fertilizer for rice planting and a preparation method thereof. The slow-release compound fertilizer comprises core fertilizer particles and a coating layer coating the surface of the core fertilizer particles. The slow-release compound fertilizer comprises a core fertilizer and a coating layer coating the surface of the core fertilizer, wherein the core fertilizer forms a three-layer structure by adopting sulfur coated urea, so that the slow-release effect is obvious, the fertilizer efficiency is high, top dressing is not needed in the planting process, the core fertilizer and the coating layer are made of organic degradable materials, and the fertilizer efficiency can be maintained in the gradual degradation process. Moreover, the core fertilizer is enriched in trace elements, so that the nutritive value of rice is improved, the soil property can be improved, the fertilizer components are friendly to soil, the production cost is low, and the slow-release compound fertilizer contributes to market popularization and is high in economic benefits.
Description
Technical field
The present invention relates to a kind of Rice Cropping long-acting selenium-rich coated slow-release compound fertilizer and preparation method thereof.
Background technology
Oryza sativa L. (formal name used at school: Oryzasativa) is the one of draft Oryza, is also the longest main one as grain in Oryza, is also called Asian type cultivated rice, could also say that rice in simple terms.For annual, grass, unifacial leaf, property happiness is warm and humid, there are about 1 meter high time ripe, and leaf is elongated, there are about 50 to 100 centimeter length, wide about 2 to 2.5 centimetres.Spending of rice is very little, and when blooming, main spray can present arch, down all can hold little Hua between 30 to 50 centimetres in end of the branch, and major part self-pollination also bears seeds, and is called spike of rice.The size of general spike of rice is long at 5 to 12 millimeters, 2 to 3 mm of thickness.
There are about half people in the world with rice for staple food, particularly Asia, rice is main source of nutrition.There is Rice Production different continents, but are maximum with Asia, sown area be the world 90%. in Asia, India is the important product rice country being only second to China, and sown area ranks first in the world, and total output occupies second, Japan per unit area yield significantly high, be in the world rice high yield country one of.
China is one of main cradle of rice-cultivating, Shi Daozuo history ancient country, Ye Shi Oryza glutinosa big producing country.China or Oryza sativa L. science and technology power." Green revolution " of world's short stalk rice breeding comes from China, and the hybrid rice of China is well known especially.Oryza sativa L. is the staple food crop of China, one of commodity food that Ye Shi China is important, and the sown area of Oryza sativa L. and total output occupy the first place of cereal crops, and sown area occupies second in Chan Dao state of the world, and total output occupies first of the world.China's rice growing area is substantially stable at 3000～31,000,000 hectares, total output about 20,000 tons, yield per unit area 6300～6500 kg/ha.Sown area accounts for the 20.2% of the corn gross area, and yield accounts for the 43.4% of total grain yield, owing to rice yield is stable, has very important status in China's grain-production.
China is as the first in the world populous nation, and the problem how resolving food supply has become as the important topic that China faces.Along with the fast development of Rice Cropping technology in the last few years and the continuous of cultivated area expand, Oryza sativa L. in occupation of consequence all the more, also plays irreplaceable effect in national life simultaneously in solving China's food supply.But from the current situation of Oryza sativa L., China's Rice Cropping there is also some common problems, limit the development of Rice Cropping industry.
Accelerating along with China rural holding is reversed, emerge the rich and influential family that more and more tills the land, agricultural is just fast-developing towards industrialization direction.Go down town in a large number plus China peasant and work, cause that rural area person between twenty and fifty labour force's is in short supply, cause that in scale agricultural production, human cost increases, especially large crops need repeatedly to apply fertilizer, not only time-consuming, plant growth manuring late inconvenience, production cost increases, and element rests in soil more after fertilising, in the course of time, make certain element in soil excessive, again apply fertilizer, the situation of burn seedlings likely occurs, and overfertilization also can make soil soil property worsen, the soil that soil property worsens, not only affect yield, also can reduce the agro-farming land area that China reduces day by day, make grain drop in production, form vicious cycle.
Therefore, it is necessary to a kind of long-acting rice plantation fertilizer, fertilizer planted for long-acting rice, domestic is at present primarily present following patent documentation:
Patent publication No.: CN105175086A, disclose a kind of selenium-rich long-acting rice Special slow release fertilizer, including core layer and the coating layer being coated on core surface, core layer is mixed by the component raw material of following weight portion: biological powdered carbon 40-50, carbamide 20-25, ammonium nitrate 10-15, potassium sulfate 15-18, calcium superphosphate 35-40, ammonium sulfate 8-10, soy sauce residues 8-10, sodium selenite 0.5-0.7, yeast waste liquor 8-10, fertilizer additive 0.2-0.4, attapulgite modified 20-30, the weight of core layer is the 50%～60% of slow-release fertilizer gross weight, coating layer is the mixture of biological powdered carbon and binding agent, the weight of coating layer is the 40%～50% of slow-release fertilizer gross weight.The nutrient slow releasing of fertilizer of the present invention is controlled, and single fertilization disclosure satisfy that the needs to fertilizer of the whole trophophase of crop, reduces fertilizer amount, improves rice yield, improve rice quality.Degradable food packaging material of the present invention, the material environmental sound that it is taked, it is possible to degraded, environmental protection.But, the selenium-rich long-acting rice Special slow release fertilizer that this patent provides, in its fertilizer composition, except selenium, it does not have other trace element, Fertilizer nutrient is worth not high.
Summary of the invention
For solving above-mentioned Problems existing, it is an object of the invention to provide a kind of Rice Cropping long-acting selenium-rich coated slow-release compound fertilizer and preparation method thereof, described slow-release compound fertilizer includes nuclear core fertilizer and is coated on the coating layer on nuclear core fertilizer surface, nuclear core fertilizer adopts sulfur coated urea, form three-decker, slow release effect is become apparent from, fertilizer efficiency is long, without topdressing in planting process, nuclear core is fertile is organic degradation material composition with coating layer, the process progressively degraded also can keep fertilizer efficiency, and rich in trace element in nuclear core fertilizer, lifting rice nutrition is worth, under degradable premise, also can conditioned soil property improvement, fertilizer component is friendly to soil, production cost is low, be conducive to marketing, good in economic efficiency.
For reaching above-mentioned purpose, the technical scheme is that
A kind of Rice Cropping long-acting selenium-rich coated slow-release compound fertilizer, including nuclear core fertilizer granule and the coating layer being coated on this nuclear core fertilizer particle surface, described nuclear core fertilizer includes the composition of following weight portion: sulfur coated urea: 40～60 parts, potassium superphosphate: 20～30 parts, MAP: 10～20 parts, potassium chloride: 15～25 parts, calcium magnesium phosphate: 10～15 parts, ammonium magnesium phosphate: 1～10 part, attapulgite: 10～15 parts, EDTA chelated iron: 1～5 part, EDTA chelated zinc: 1～5 part, EDTA chelated copper: 1～5 part, humic acid urea ferrum: 1～5 part, humic acids magnesium: 1～5 part, urease inhibitor: 0.5～1 part, nitrification inhibitor: 0.5～1 part, sodium selenite: 0.5～1 part；Described coating layer includes the composition of following weight portion: chitosan: 20～30 parts, Pioloform, polyvinyl acetal: 5～10 parts, modified tapioca starch: 5～10 parts, ardealite: 1～5 part, micron hollow glass fibre element powder: 1～5 part, polyvinyl alcohol urea phosphate: 1～5 part, sodium lignosulfonate: 1～5 part, kieselguhr: 1～5 part, binding agent: 1～5 part, deionized water: 1～5 part, acetic acid: 0.1～0.5 part.
Further, described nuclear core fertilizer includes the composition of following weight portion: sulfur coated urea: 50～60 parts, potassium superphosphate: 25～30 parts, MAP: 15～20 parts, potassium chloride: 15～20 parts, calcium magnesium phosphate: 13～15 parts, ammonium magnesium phosphate: 5～10 parts, attapulgite: 10～13 parts, EDTA chelated iron: 2～5 parts, EDTA chelated zinc: 1～3 part, EDTA chelated copper: 1～4 part, humic acid urea ferrum: 3～5 parts, humic acids magnesium: 1～3 part, urease inhibitor: 0.5～0.8 part, nitrification inhibitor: 0.7～1 part, sodium selenite: 0.6～1 part；Described coating layer includes the composition of following weight portion: chitosan: 20～25 parts, Pioloform, polyvinyl acetal: 5～7 parts, modified tapioca starch: 7～10 parts, ardealite: 1～3 part, micron hollow glass fibre element powder: 2～5 parts, polyvinyl alcohol urea phosphate: 3～5 parts, sodium lignosulfonate: 1～4 part, kieselguhr: 3～5 parts, binding agent: 2～5 parts, deionized water: 1～3 part, acetic acid: 0.1～0.3 part.
Preferably, described nuclear core fertilizer includes the composition of following weight portion: sulfur coated urea: 50 parts, potassium superphosphate: 25 parts, MAP: 15 parts, potassium chloride: 18 parts, calcium magnesium phosphate: 14 parts, ammonium magnesium phosphate: 6 parts, attapulgite: 12 parts, EDTA chelated iron: 3 parts, EDTA chelated zinc: 2 parts, EDTA chelated copper: 4 parts, humic acid urea ferrum: 4 parts, humic acids magnesium: 2 parts, urease inhibitor: 0.8 part, nitrification inhibitor: 0.7 part, sodium selenite: 1 part；Described coating layer includes the composition of following weight portion: chitosan: 25 parts, Pioloform, polyvinyl acetal: 6 parts, modified tapioca starch: 8 parts, ardealite: 2 parts, micron hollow glass fibre element powder: 3 parts, polyvinyl alcohol urea phosphate: 4 parts, sodium lignosulfonate: 3 parts, kieselguhr: 4 parts, binding agent: 3 parts, deionized water: 2 parts, acetic acid: 0.2 part.
Separately, stating nitrification inhibitor is 3,4-dimethyl pyrazole phosphate, 2-chloro-6-(trichloromethyl) pyridine, 3，5-dimethylpyrazole or dicyandiamide.
Separately having, described urease inhibitor is hydroquinone, N-NBPT, N-butyl thio-phosphamide or phosphoric triamide.
Again, the weight ratio between described coating layer and nuclear core fertilizer is 1:8～10.
Further, described binding agent is paraffin or Colophonium.
And, described sulfur coated urea includes the composition of following weight portion: carbamide: 50～60 parts, sulfur: 20～30 parts, polyvinyl alcohol: 10～15 parts, Lauxite: 1～5 part, diatomite in powder: 1～5 part, in described carbamide, N content is 35～40wt%, and in sulfur, S content is 25～35wt%.
Separately, described sulfur coated urea preparation method comprises the steps: that carbamide is sent into fluid bed is preheated to 65～70 DEG C, it is then fed into being coated with in sulfur rotary drum and heats to 75～80 DEG C, sulfur is warming up to 150～160 DEG C melt, sulfur must be melted, under the pressure of 6.5～10MPa, atomization injection are extremely coated with the urea surface in sulfur rotary drum, form sulfur film, send into binding agent rotary drum, the mixture of spraying polyethylene alcohol and Lauxite at 75～80 DEG C, it is cooled to 30～40 DEG C, send into regulator rotary drum, rotate parcel diatomite in powder, dry, it is cooled to room temperature, obtain described sulfur coated urea, particle diameter is 2～4mm.
Meanwhile, the preparation method that the present invention also provides for a kind of Rice Cropping long-acting selenium-rich coated slow-release compound fertilizer, it is characterised in that comprise the steps:
1) peplos solution is prepared
Described modified tapioca starch is added deionized water and obtains gelatinized starch in the stirred in water bath of 60～70 DEG C, chitosan is added in deionized water, add acetic acid, it is warming up to 80～90 DEG C, speed insulated and stirred 1～2h with 100-200r/min, obtain chitosan solution, with the speed of 1～3ml/min by polyvinyl alcohol urea phosphate, sodium lignosulfonate, Pioloform, polyvinyl acetal, Pioloform, polyvinyl acetal, kieselguhr, ardealite and binding agent drop in gained chitosan solution, obtain mixed liquor, mixed liquor is dropped in gelatinized starch with the speed of 3～6ml/min, add micron hollow glass fibre element powder, 10～15min adds, quickly stirring 10～20min is to uniformly, dry, pulverize, cross 150～200 mesh sieves and obtain peplos solution；
2) nuclear core fertilizer is prepared
After potassium chloride, nitrification inhibitor, urease inhibitor and sodium selenite are mixed, add suitable quantity of water, stir, obtain combination solution standby；Sulfur coated urea, ammonium dihydrogen phosphate, MAP, calcium magnesium phosphate, ammonium magnesium phosphate, attapulgite, EDTA chelated iron, EDTA chelated zinc, EDTA chelated copper, humic acid urea ferrum and humic acids magnesium are mixed, stir, mix with gained combination solution, make pasty material, temperature controls at 100～120 DEG C, shear granulation, is cooled to 45～65 DEG C after heat exchange, obtain nuclear core fertilizer granule；
3) Rice Cropping long-acting selenium-rich coated slow-release compound fertilizer is prepared
With spray gun to step 2) gained nuclear core fertilizer granule even application step 1) in the peplos solution that obtains; wet stock with coated fertilizer is sent into the roller pelletizer with hot-air blower; setting speed 350～360r/min; temperature 70～80 DEG C; pelletize 40～50min; at 60～90 DEG C, dry 2～3h, is cooled to room temperature preservation stand-by, obtains described Rice Cropping long-acting selenium-rich coated slow-release compound fertilizer.
The beneficial effects of the present invention is:
nullDescribed slow-release compound fertilizer includes nuclear core fertilizer and is coated on the coating layer on nuclear core fertilizer surface，Double-decker makes slow release effect become apparent from，And carbamide unconventional urea granules，But employing sulfur coated urea，And then form three layers capsule structure，Effectively increase fertilizer efficiency，By urease inhibitor, the hydrolysis of carbamide is controlled，Restriction forms the speed of ammonium，Control ammonium in soil、The concentration of nitrogen，Prevent from causing damage because can send out，By the activity of nitrite bacteria in nitrification inhibitor adjustment soil to hinder the generation of nitrification and denitrification，The nitrogen in soil is made to be present in soil with the form of ammonia，Fertilizer efficiency is long，Fertilizer effect duration can run through Rice Cropping all the time，Without additionally topdressing，Fertilizer efficiency was up to 4～5 months，Meet Rice Cropping needs，Nuclear core is fertile in nitrogen necessary to paddy growth、Phosphorus、Potassium etc. must element，And rich in EDTA chelated iron in nuclear core fertilizer、EDTA chelated zinc、EDTA chelated copper、Humic acid urea ferrum，The nutrition units such as humic acids magnesium，Chelating form is more conducive to absorb，Can effectively promote microelement contents of soil，Improve soil and rice nutrition is worth，And，Humic acid urea ferrum，Humic acids magnesium and humic acids with the use of，More can be efficiently modified soil soil property，Coating layer adopts micron hollow glass fibre element powder，Coating layer is formed some passages，Progressively release nuclear core fertilizer granule，Increase fertilizer efficiency period further，And coating layer adopts ardealite carry out peplos，Form the coating layer of a kind of semi permeable slow dissolving，Form twice laid，Plant recovery of nutrient height has slow-release compound fertilizer 10～15%，Fertilizer component is friendly to soil，Production cost is low，Be conducive to marketing，Good in economic efficiency.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is described in detail.Following example will assist in those skilled in the art and are further appreciated by the present invention, but do not limit the present invention in any form.It should be pointed out that, to those skilled in the art, without departing from the inventive concept of the premise, it is also possible to make some deformation and improvement.These broadly fall into protection scope of the present invention.
A kind of Rice Cropping of the present invention long-acting selenium-rich coated slow-release compound fertilizer, including nuclear core fertilizer granule and the coating layer being coated on this nuclear core fertilizer particle surface, described nuclear core fertilizer includes the composition of following weight portion: sulfur coated urea: 40～60 parts, potassium superphosphate: 20～30 parts, MAP: 10～20 parts, potassium chloride: 15～25 parts, calcium magnesium phosphate: 10～15 parts, ammonium magnesium phosphate: 1～10 part, attapulgite: 10～15 parts, EDTA chelated iron: 1～5 part, EDTA chelated zinc: 1～5 part, EDTA chelated copper: 1～5 part, humic acid urea ferrum: 1～5 part, humic acids magnesium: 1～5 part, urease inhibitor: 0.5～1 part, nitrification inhibitor: 0.5～1 part, sodium selenite: 0.5～1 part；Described coating layer includes the composition of following weight portion: chitosan: 20～30 parts, Pioloform, polyvinyl acetal: 5～10 parts, modified tapioca starch: 5～10 parts, ardealite: 1～5 part, micron hollow glass fibre element powder: 1～5 part, polyvinyl alcohol urea phosphate: 1～5 part, sodium lignosulfonate: 1～5 part, kieselguhr: 1～5 part, binding agent: 1～5 part, deionized water: 1～5 part, acetic acid: 0.1～0.5 part.
Further, described nuclear core fertilizer includes the composition of following weight portion: sulfur coated urea: 50～60 parts, potassium superphosphate: 25～30 parts, MAP: 15～20 parts, potassium chloride: 15～20 parts, calcium magnesium phosphate: 13～15 parts, ammonium magnesium phosphate: 5～10 parts, attapulgite: 10～13 parts, EDTA chelated iron: 2～5 parts, EDTA chelated zinc: 1～3 part, EDTA chelated copper: 1～4 part, humic acid urea ferrum: 3～5 parts, humic acids magnesium: 1～3 part, urease inhibitor: 0.5～0.8 part, nitrification inhibitor: 0.7～1 part, sodium selenite: 0.6～1 part；Described coating layer includes the composition of following weight portion: chitosan: 20～25 parts, Pioloform, polyvinyl acetal: 5～7 parts, modified tapioca starch: 7～10 parts, ardealite: 1～3 part, micron hollow glass fibre element powder: 2～5 parts, polyvinyl alcohol urea phosphate: 3～5 parts, sodium lignosulfonate: 1～4 part, kieselguhr: 3～5 parts, binding agent: 2～5 parts, deionized water: 1～3 part, acetic acid: 0.1～0.3 part.
Preferably, described nuclear core fertilizer includes the composition of following weight portion: sulfur coated urea: 50 parts, potassium superphosphate: 25 parts, MAP: 15 parts, potassium chloride: 18 parts, calcium magnesium phosphate: 14 parts, ammonium magnesium phosphate: 6 parts, attapulgite: 12 parts, EDTA chelated iron: 3 parts, EDTA chelated zinc: 2 parts, EDTA chelated copper: 4 parts, humic acid urea ferrum: 4 parts, humic acids magnesium: 2 parts, urease inhibitor: 0.8 part, nitrification inhibitor: 0.7 part, sodium selenite: 1 part；Described coating layer includes the composition of following weight portion: chitosan: 25 parts, Pioloform, polyvinyl acetal: 6 parts, modified tapioca starch: 8 parts, ardealite: 2 parts, micron hollow glass fibre element powder: 3 parts, polyvinyl alcohol urea phosphate: 4 parts, sodium lignosulfonate: 3 parts, kieselguhr: 4 parts, binding agent: 3 parts, deionized water: 2 parts, acetic acid: 0.2 part.
Separately, stating nitrification inhibitor is 3,4-dimethyl pyrazole phosphate, 2-chloro-6-(trichloromethyl) pyridine, 3，5-dimethylpyrazole or dicyandiamide.
Separately having, described urease inhibitor is hydroquinone, N-NBPT, N-butyl thio-phosphamide or phosphoric triamide.
Again, the weight ratio between described coating layer and nuclear core fertilizer is 1:8～10.
Further, described binding agent is paraffin or Colophonium.
And, described sulfur coated urea includes the composition of following weight portion: carbamide: 50～60 parts, sulfur: 20～30 parts, polyvinyl alcohol: 10～15 parts, Lauxite: 1～5 part, diatomite in powder: 1～5 part, in described carbamide, N content is 35～40wt%, and in sulfur, S content is 25～35wt%.
Separately, described sulfur coated urea preparation method comprises the steps: that carbamide is sent into fluid bed is preheated to 65～70 DEG C, it is then fed into being coated with in sulfur rotary drum and heats to 75～80 DEG C, sulfur is warming up to 150～160 DEG C melt, sulfur must be melted, under the pressure of 6.5～10MPa, atomization injection are extremely coated with the urea surface in sulfur rotary drum, form sulfur film, send into binding agent rotary drum, the mixture of spraying polyethylene alcohol and Lauxite at 75～80 DEG C, it is cooled to 30～40 DEG C, send into regulator rotary drum, rotate parcel diatomite in powder, dry, it is cooled to room temperature, obtain described sulfur coated urea, particle diameter is 2～4mm.
Meanwhile, the preparation method that the present invention also provides for a kind of Rice Cropping long-acting selenium-rich coated slow-release compound fertilizer, it is characterised in that comprise the steps:
1) peplos solution is prepared
Described modified tapioca starch is added deionized water and obtains gelatinized starch in the stirred in water bath of 60～70 DEG C, chitosan is added in deionized water, add acetic acid, it is warming up to 80～90 DEG C, speed insulated and stirred 1～2h with 100-200r/min, obtain chitosan solution, with the speed of 1～3ml/min by polyvinyl alcohol urea phosphate, sodium lignosulfonate, Pioloform, polyvinyl acetal, Pioloform, polyvinyl acetal, kieselguhr, ardealite and binding agent drop in gained chitosan solution, obtain mixed liquor, mixed liquor is dropped in gelatinized starch with the speed of 3～6ml/min, add micron hollow glass fibre element powder, 10～15min adds, quickly stirring 10～20min is to uniformly, dry, pulverize, cross 150～200 mesh sieves and obtain peplos solution；
2) nuclear core fertilizer is prepared
After potassium chloride, nitrification inhibitor, urease inhibitor and sodium selenite are mixed, add suitable quantity of water, stir, obtain combination solution standby；Sulfur coated urea, ammonium dihydrogen phosphate, MAP, calcium magnesium phosphate, ammonium magnesium phosphate, attapulgite, EDTA chelated iron, EDTA chelated zinc, EDTA chelated copper, humic acid urea ferrum and humic acids magnesium are mixed, stir, mix with gained combination solution, make pasty material, temperature controls at 100～120 DEG C, shear granulation, is cooled to 45～65 DEG C after heat exchange, obtain nuclear core fertilizer granule；
3) Rice Cropping long-acting selenium-rich coated slow-release compound fertilizer is prepared
With spray gun to step 2) gained nuclear core fertilizer granule even application step 1) in the peplos solution that obtains; wet stock with coated fertilizer is sent into the roller pelletizer with hot-air blower; setting speed 350～360r/min; temperature 70～80 DEG C; pelletize 40～50min; at 60～90 DEG C, dry 2～3h, is cooled to room temperature preservation stand-by, obtains described Rice Cropping long-acting selenium-rich coated slow-release compound fertilizer.
Wherein, a kind of Rice Cropping that table 1 provides for various embodiments of the present invention fertile ingredient lists of nuclear core in long-acting selenium-rich coated slow-release compound fertilizer.A kind of Rice Cropping that table 2 provides for various embodiments of the present invention ingredient lists of coating layer in long-acting selenium-rich coated slow-release compound fertilizer.A kind of Rice Cropping that table 3 provides for various embodiments of the present invention ingredient lists of sulfur coated urea in long-acting selenium-rich coated slow-release compound fertilizer.Table 4 is for contrasting before and after soil soil property key parameter after using a kind of Rice Cropping provided by the present invention long-acting selenium-rich coated slow-release compound fertilizer.Table 5 is a kind of Rice Cropping provided by the present invention with the cumulative leaching rate list at the Static Water N of 25 DEG C of the long-acting selenium-rich coated slow-release compound fertilizer.
Table 1 (unit: weight portion)
Table 2 (unit: weight portion)
Table 3
| Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 | |
| Carbamide (part) | 55 | 58 | 53 | 60 | 50 |
| Sulfur (part) | 25 | 23 | 28 | 20 | 30 |
| Polyvinyl alcohol (part) | 13 | 10 | 12 | 15 | 14 |
| Lauxite (part) | 3 | 1 | 5 | 2 | 4 |
| Diatomite in powder (part) | 2 | 5 | 4 | 1 | 3 |
| Carbamide leaded wastewater (wt%) | 38 | 35 | 40 | 37 | 39 |
| Sulfur measures (wt%) containing S | 30 | 25 | 28 | 35 | 33 |
Table 4
Table 5
| Dissolution time (my god) | Cumulative leaching rate (%) |
| 10 | 11.23 |
| 30 | 16.57 |
| 50 | 25.69 |
| 80 | 50.47 |
| 100 | 68.36 |
| 120 | 88.49 |
| 150 | 99.14 |
nullA kind of Rice Cropping provided by the present invention long-acting selenium-rich coated slow-release compound fertilizer and preparation method thereof，Described slow-release compound fertilizer includes nuclear core fertilizer and is coated on the coating layer on nuclear core fertilizer surface，Double-decker makes slow release effect become apparent from，And carbamide unconventional urea granules，But employing sulfur coated urea，And then form three layers capsule structure，Effectively increase fertilizer efficiency，By urease inhibitor, the hydrolysis of carbamide is controlled，Restriction forms the speed of ammonium，Control ammonium in soil、The concentration of nitrogen，Prevent from causing damage because can send out，By the activity of nitrite bacteria in nitrification inhibitor adjustment soil to hinder the generation of nitrification and denitrification，The nitrogen in soil is made to be present in soil with the form of ammonia，Fertilizer efficiency is long，Fertilizer effect duration can run through Rice Cropping all the time，Without additionally topdressing，Fertilizer efficiency was up to 4～5 months，Meet Rice Cropping needs，Nuclear core is fertile in nitrogen necessary to paddy growth、Phosphorus、Potassium etc. must element，And rich in EDTA chelated iron in nuclear core fertilizer、EDTA chelated zinc、EDTA chelated copper、Humic acid urea ferrum，The nutrition units such as humic acids magnesium，Chelating form is more conducive to absorb，Can effectively promote microelement contents of soil，Improve soil and rice nutrition is worth，And，Humic acid urea ferrum，Humic acids magnesium and humic acids with the use of，More can be efficiently modified soil soil property，Coating layer adopts micron hollow glass fibre element powder，Coating layer is formed some passages，Progressively release nuclear core fertilizer granule，Increase fertilizer efficiency period further，And coating layer adopts ardealite carry out peplos，Form the coating layer of a kind of semi permeable slow dissolving，Form twice laid，Plant recovery of nutrient height has slow-release compound fertilizer 10～15%，Fertilizer component is friendly to soil，Production cost is low，Be conducive to marketing，Good in economic efficiency.
It should be noted that above example is only in order to illustrate technical scheme and unrestricted.Although the present invention being described in detail with reference to preferred embodiment, it will be understood by those within the art that, the technical scheme of invention can being modified or equivalent replacement, without deviating from the scope of technical solution of the present invention, it all should be encompassed in scope of the presently claimed invention.
Claims (10)
1. a Rice Cropping long-acting selenium-rich coated slow-release compound fertilizer, it is characterized in that, including nuclear core fertilizer granule and the coating layer being coated on this nuclear core fertilizer particle surface, described nuclear core fertilizer includes the composition of following weight portion: sulfur coated urea: 40 ~ 60 parts, potassium superphosphate: 20 ~ 30 parts, MAP: 10 ~ 20 parts, potassium chloride: 15 ~ 25 parts, calcium magnesium phosphate: 10 ~ 15 parts, ammonium magnesium phosphate: 1 ~ 10 part, attapulgite: 10 ~ 15 parts, EDTA chelated iron: 1 ~ 5 part, EDTA chelated zinc: 1 ~ 5 part, EDTA chelated copper: 1 ~ 5 part, humic acid urea ferrum: 1 ~ 5 part, humic acids magnesium: 1 ~ 5 part, urease inhibitor: 0.5 ~ 1 part, nitrification inhibitor: 0.5 ~ 1 part, sodium selenite: 0.5 ~ 1 part；Described coating layer includes the composition of following weight portion: chitosan: 20 ~ 30 parts, Pioloform, polyvinyl acetal: 5 ~ 10 parts, modified tapioca starch: 5 ~ 10 parts, ardealite: 1 ~ 5 part, micron hollow glass fibre element powder: 1 ~ 5 part, polyvinyl alcohol urea phosphate: 1 ~ 5 part, sodium lignosulfonate: 1 ~ 5 part, kieselguhr: 1 ~ 5 part, binding agent: 1 ~ 5 part, deionized water: 1 ~ 5 part, acetic acid: 0.1 ~ 0.5 part.
2. a kind of Rice Cropping according to claim 1 long-acting selenium-rich coated slow-release compound fertilizer, it is characterized in that, described nuclear core fertilizer includes the composition of following weight portion: sulfur coated urea: 50 ~ 60 parts, potassium superphosphate: 25 ~ 30 parts, MAP: 15 ~ 20 parts, potassium chloride: 15 ~ 20 parts, calcium magnesium phosphate: 13 ~ 15 parts, ammonium magnesium phosphate: 5 ~ 10 parts, attapulgite: 10 ~ 13 parts, EDTA chelated iron: 2 ~ 5 parts, EDTA chelated zinc: 1 ~ 3 part, EDTA chelated copper: 1 ~ 4 part, humic acid urea ferrum: 3 ~ 5 parts, humic acids magnesium: 1 ~ 3 part, urease inhibitor: 0.5 ~ 0.8 part, nitrification inhibitor: 0.7 ~ 1 part, sodium selenite: 0.6 ~ 1 part；Described coating layer includes the composition of following weight portion: chitosan: 20 ~ 25 parts, Pioloform, polyvinyl acetal: 5 ~ 7 parts, modified tapioca starch: 7 ~ 10 parts, ardealite: 1 ~ 3 part, micron hollow glass fibre element powder: 2 ~ 5 parts, polyvinyl alcohol urea phosphate: 3 ~ 5 parts, sodium lignosulfonate: 1 ~ 4 part, kieselguhr: 3 ~ 5 parts, binding agent: 2 ~ 5 parts, deionized water: 1 ~ 3 part, acetic acid: 0.1 ~ 0.3 part.
3. a kind of Rice Cropping according to claim 1 long-acting selenium-rich coated slow-release compound fertilizer, it is characterized in that, described nuclear core fertilizer includes the composition of following weight portion: sulfur coated urea: 50 parts, potassium superphosphate: 25 parts, MAP: 15 parts, potassium chloride: 18 parts, calcium magnesium phosphate: 14 parts, ammonium magnesium phosphate: 6 parts, attapulgite: 12 parts, EDTA chelated iron: 3 parts, EDTA chelated zinc: 2 parts, EDTA chelated copper: 4 parts, humic acid urea ferrum: 4 parts, humic acids magnesium: 2 parts, urease inhibitor: 0.8 part, nitrification inhibitor: 0.7 part, sodium selenite: 1 part；Described coating layer includes the composition of following weight portion: chitosan: 25 parts, Pioloform, polyvinyl acetal: 6 parts, modified tapioca starch: 8 parts, ardealite: 2 parts, micron hollow glass fibre element powder: 3 parts, polyvinyl alcohol urea phosphate: 4 parts, sodium lignosulfonate: 3 parts, kieselguhr: 4 parts, binding agent: 3 parts, deionized water: 2 parts, acetic acid: 0.2 part.
4. a kind of Rice Cropping according to claim 1 long-acting selenium-rich coated slow-release compound fertilizer, it is characterised in that stating nitrification inhibitor is 3,4-dimethyl pyrazole phosphate, 2-chloro-6-(trichloromethyl) pyridine, 3，5-dimethylpyrazole or dicyandiamide.
5. a kind of Rice Cropping according to claim 1 long-acting selenium-rich coated slow-release compound fertilizer, it is characterised in that described urease inhibitor is hydroquinone, N-NBPT, N-butyl thio-phosphamide or phosphoric triamide.
6. a kind of Rice Cropping according to claim 1 long-acting selenium-rich coated slow-release compound fertilizer, it is characterised in that the weight ratio between described coating layer and nuclear core fertilizer is 1:8 ~ 10.
7. a kind of Rice Cropping according to claim 1 long-acting selenium-rich coated slow-release compound fertilizer, it is characterised in that described binding agent is paraffin or Colophonium.
8. a kind of Rice Cropping according to claim 1 long-acting selenium-rich coated slow-release compound fertilizer, it is characterized in that, described sulfur coated urea includes the composition of following weight portion: carbamide: 50 ~ 60 parts, sulfur: 20 ~ 30 parts, polyvinyl alcohol: 10 ~ 15 parts, Lauxite: 1 ~ 5 part, diatomite in powder: 1 ~ 5 part, in described carbamide, N content is 35 ~ 40wt%, and in sulfur, S content is 25 ~ 35wt%.
9. a kind of Rice Cropping according to claim 8 long-acting selenium-rich coated slow-release compound fertilizer, it is characterized in that, described sulfur coated urea preparation method comprises the steps: that carbamide is sent into fluid bed is preheated to 65 ~ 70 DEG C, it is then fed into being coated with in sulfur rotary drum and heats to 75 ~ 80 DEG C, sulfur is warming up to 150 ~ 160 DEG C melt, sulfur must be melted, under the pressure of 6.5 ~ 10MPa, atomization injection are extremely coated with the urea surface in sulfur rotary drum, form sulfur film, send into binding agent rotary drum, the mixture of spraying polyethylene alcohol and Lauxite at 75 ~ 80 DEG C, it is cooled to 30 ~ 40 DEG C, send into regulator rotary drum, rotate parcel diatomite in powder, dry, it is cooled to room temperature, obtain described sulfur coated urea, particle diameter is 2 ~ 4mm.
10. the Rice Cropping as according to any one of claim 1 ~ 9 preparation method of long-acting selenium-rich coated slow-release compound fertilizer, it is characterised in that comprise the steps:
Prepare peplos solution
Described modified tapioca starch is added deionized water and obtains gelatinized starch in the stirred in water bath of 60 ~ 70 DEG C, chitosan is added in deionized water, add acetic acid, it is warming up to 80 ~ 90 DEG C, speed insulated and stirred 1 ~ 2h with 100-200r/min, obtain chitosan solution, with the speed of 1 ~ 3ml/min by polyvinyl alcohol urea phosphate, sodium lignosulfonate, Pioloform, polyvinyl acetal, Pioloform, polyvinyl acetal, kieselguhr, ardealite and binding agent drop in gained chitosan solution, obtain mixed liquor, mixed liquor is dropped in gelatinized starch with the speed of 3 ~ 6ml/min, add micron hollow glass fibre element powder, 10 ~ 15min adds, quickly stirring 10 ~ 20min is to uniformly, dry, pulverize, cross 150 ~ 200 mesh sieves and obtain peplos solution；
Preparation nuclear core is fertile
After potassium chloride, nitrification inhibitor, urease inhibitor and sodium selenite are mixed, add suitable quantity of water, stir, obtain combination solution standby；Sulfur coated urea, ammonium dihydrogen phosphate, MAP, calcium magnesium phosphate, ammonium magnesium phosphate, attapulgite, EDTA chelated iron, EDTA chelated zinc, EDTA chelated copper, humic acid urea ferrum and humic acids magnesium are mixed, stir, mix with gained combination solution, make pasty material, temperature controls at 100 ~ 120 DEG C, shear granulation, is cooled to 45 ~ 65 DEG C after heat exchange, obtain nuclear core fertilizer granule；
Prepare Rice Cropping long-acting selenium-rich coated slow-release compound fertilizer
With spray gun to step 2) gained nuclear core fertilizer granule even application step 1) in the peplos solution that obtains; wet stock with coated fertilizer is sent into the roller pelletizer with hot-air blower; setting speed 350 ~ 360r/min; temperature 70 ~ 80 DEG C; pelletize 40 ~ 50min; at 60 ~ 90 DEG C, dry 2 ~ 3h, is cooled to room temperature preservation stand-by, obtains described Rice Cropping long-acting selenium-rich coated slow-release compound fertilizer.
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| CN106242764A (en) * | 2016-08-04 | 2016-12-21 | 陕西科技大学 | A kind of preparation method of selenium-rich sustained release particle substrate fertilizer |
| CN106977316A (en) * | 2017-05-18 | 2017-07-25 | 宿州市逢源生物科技有限公司 | A kind of rice straw charcoal slow-release fertilizer of lignin montmorillonite chitosan compound coating and preparation method thereof |
| CN107473909A (en) * | 2017-08-14 | 2017-12-15 | 史丹利化肥扶余有限公司 | A kind of composite organic-inorganic fertilizer with prevention and control pest and disease damage function and preparation method thereof |
| CN108129232A (en) * | 2017-12-20 | 2018-06-08 | 广西南宁桂启科技发展有限公司 | Se-enriched bio bacterial manure and its application |
| CN108658673A (en) * | 2018-06-27 | 2018-10-16 | 安徽瑞然生物药肥科技有限公司 | A kind of coated fertilizer and preparation method thereof for slow release fertilizer |
| CN108929165A (en) * | 2018-08-10 | 2018-12-04 | 湖北茂盛生物有限公司 | A kind of selenium-rich synchronous slow paddy rice-dedicated fertilizer and preparation method thereof |
| CN109328520A (en) * | 2018-10-12 | 2019-02-15 | 上海市园林科学规划研究院 | A kind of method of organic waste improvement urban soil crumb structure |
| CN109761703A (en) * | 2019-03-07 | 2019-05-17 | 湖北宜施壮农业科技有限公司 | A kind of multifunction long-acting slow-release rice fertilizer |
| CN110606793A (en) * | 2019-10-31 | 2019-12-24 | 海南天道种业有限公司 | Rice slow-release fertilizer and preparation method thereof |
| CN116283440A (en) * | 2023-03-03 | 2023-06-23 | 新洋丰农业科技股份有限公司 | Organic stable fertilizer for rice and preparation method thereof |
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Application publication date: 20160720 |