CN102557841B - Sustained and controlled release nitrogen fertilizer suitable for being applied to crops in low temperature arid areas and preparation and application - Google Patents
Sustained and controlled release nitrogen fertilizer suitable for being applied to crops in low temperature arid areas and preparation and application Download PDFInfo
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- CN102557841B CN102557841B CN201110435450XA CN201110435450A CN102557841B CN 102557841 B CN102557841 B CN 102557841B CN 201110435450X A CN201110435450X A CN 201110435450XA CN 201110435450 A CN201110435450 A CN 201110435450A CN 102557841 B CN102557841 B CN 102557841B
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Abstract
The invention relates to a sustained and controlled release nitrogen fertilizer suitable for being applied to crops in low temperature arid areas as well as a preparation and an application thereof. The sustained and controlled release nitrogen fertilizer comprises raw materials in part by weight as follows: 90 to 180 parts of 5% humic acid coated urea, 250 to 360 parts of 7.5% humic acid coated urea, 250 to 360 parts of sulfur coated urea, 100 to 200 parts of sulfur plus 2% high polymer coated urea, and 40 to 120 parts of sulfur plus 3% high polymer coated urea. A nutrient release law of the sustained and controlled release nitrogen fertilizer disclosed by the invention is particularly suitable for the absorption requirements for different growth stages of the crops in the low temperature arid areas and satisfies the requirements for the whole growth periods of most crops in the low temperature arid areas, and additional fertilizers are not required in one-time fertilize application. The invention further provides a preparation method and an application method of the sustained and controlled release nitrogen fertilizer.
Description
Technical field
The present invention relates to a kind of fertilizer, particularly a kind of slow Controlled Release Nitrogen Fertilizer of Compositional type and preparation and application that is exclusively used in low temperature, arid area crop applying belongs to sustained-controll-release fertiliser production and applied technical field.
Background technology
China is annual agriculture with more than 3,000 ten thousand tons in nitrogenous fertilizer at present.Although using of nitrogenous fertilizer played vital role to improving crop yield, along with the increase of consumption, utilization rate of fertilizer descends, and the environmental pollution that causes because of fertilising also obviously increases.Because the nutrient of slow Controlled Release Nitrogen Fertilizer is along with Crop slowly discharges, water-soluble nitrogen residence time in soil is short, and fertilizer loss is few, and utilization ratio is high, and is little on the impact of environment, and therefore, slow Controlled Release Nitrogen Fertilizer becomes the developing direction of nitrogenous fertilizer.
CN1948227 (200510030371.5) discloses a kind of improved sulfur coated thiourea slow release fertilizer and manufacture method; CN101088971 (200610087365.8) provides a kind of long-acting slowly released nitrogen fertilizer; CN101260008 (200710071865.7) is the preparation method of urea formaldehyde; CN101050152 (200710014760.8), CN101041593 (200710038135.7), CN102001890A (201010582386.3), CN102167650A (201110028857.0) provides respectively a kind of slow-release nitrogen fertilizer that contains middle trace element, a kind of slow-release nitrogen fertilizer and manufacture method thereof, the preparation method of a kind of rosin-attapulgite-paraffin composite coated slow-release nitrogen fertilizer and preparation method thereof and a kind of gypsum-based urea gypsum-urea-ammonium sulphate control release urea.These slow Controlled Release Nitrogen Fertilizers have certain slowly-releasing or long-acting function, can increase nitrogenous fertilizer working lipe, improve fertilizer utilization efficiency.But weak point is also arranged, the one, only depend on a kind of slow-release material (even if matrix material) to be difficult to satisfy the nutrient requirement of crop different growing; Secondly, their nutrient discharges and also is difficult to be fit to low temperature, arid area Crop requirement.
Low temperature, arid area are because ground temperature is low, soil water content is relatively few, many high at high temperature, area of heavy rainfull nutrient releasing ratio, to the effective slow Controlled Release Nitrogen Fertilizer kind of crop yield, such as the larger thermohardening resin coated material of temperature influence with to be subjected to moisture condition to affect the slow Controlled Release Nitrogen Fertilizer of obvious thermoplastic resin membrane wrapping material produce low at low temperature, arid area crop growth period nutrient releasing ratio, crop yield is not obvious, even the underproduction.
Summary of the invention
For the deficiencies in the prior art, the invention provides a kind of slow Controlled Release Nitrogen Fertilizer that is applicable to low temperature, arid area crop and preparation method thereof, the present invention also provides the application method of this fertilizer.
Summary of the invention
Since two thousand five, the applicant has carried out the field experiment of the crops such as a large amount of paddy rice, corn, cotton in provinces such as China Dark Longjiang, Liaoning, Jilin, Inner Mongol, Xinjiang, studied the nutrient release conditions of multiple coated urea in soil, to the production-increasing function of crop and the effect after cooperatively interacting, propose the slow Controlled Release Nitrogen Fertilizer of a kind of Compositional type, the nutrient element releasing rule of fertilizer of the present invention is specially adapted to low temperature, the absorption requirement of arid area crop different bearing stage.This fertilizer nutrient discharges and substantially satisfies these regional most of crop requirements.And carried out field experiment, obtained good effect.
The term explanation:
1, low temperature, arid area, refer in 1 year 〉=10 ℃ of accumulated temperature below 1500 °, annual rainfall is less than 400 millimeters cool temperature zone and middle Temperate Region in China, mainly contain Xinjiang, Gansu, Inner Mongol, Heilungkiang, Jilin, Liaoning Province what China met this condition, and the some areas in Tibet, Qinghai, Shaanxi.
Technical scheme of the present invention is as follows:
Low temperature, the special-purpose slow Controlled Release Nitrogen Fertilizer of arid area crop, raw materials quality part is as follows:
90～180 parts in 5% humic acid membrane wrapping urea,
250～360 parts in 7.5% humic acid membrane wrapping urea,
250～360 parts in sulfur coating urea,
Sulphur adds 100～200 parts in 2% high polymer film-coated urea,
Sulphur adds 40～120 parts in 3% high polymer film-coated urea.
Described 5% humic acid membrane wrapping urea, 7.5% humic acid membrane wrapping urea are respectively spray one layer binders outside granular urea, spray the weathered coal of the air-dry pulverizing of one deck again, form the humic acid membrane wrapping layer.Repeating coating after solidifying makes for 1～2 time.Described binding agent total amount account for the granular urea quality 0.5～1%, weathered coal accounts for 5%, 7.5% of granular urea quality.Weathered coal accounts for 5% of granular urea quality and is 5% humic acid membrane wrapping urea; Weathered coal accounts for 7.5% of granular urea quality and is 7.5% humic acid membrane wrapping urea.Preferably, to be the Resins, epoxy dihydroxyphenyl propane with solidifying agent T31 mix by 1: 0.1 mass ratio described binding agent makes; Described weathered coal powder particle diameter 0.10-0.20mm.
Above-mentioned 5% humic acid membrane wrapping urea, 7.5% humic acid membrane wrapping urea market are on sale, for example Shandong Kingenta Bio-engineering Stock Co., Ltd. produces and sells, also can be by patent document CN100556866C (200810139610.4) disclosed " a kind of humic acid control-releasing fertilizer and preparation method thereof " preparation, the present invention quotes the full text of this patent document as prior art.Wherein, the preferred granular urea of nuclear core fertilizer urea, 2～3 millimeters of particle diameters.
Described sulfur coating urea is that it is 20～25% that the sulphur mould material accounts for nuclear core fertilizer urea quality per-cent, by the prior art preparation take granular urea as nuclear core fertilizer spraying sulphur film.
Described sulphur adds 2% high polymer film-coated urea, sulphur adds 3% high polymer film-coated urea and is, take granular urea as nuclear core fertilizer, sprays first inner cladding sulphur film respectively, sprays the surrounding layer polymer membrane again and makes; Wherein, it all is 18% that inner cladding sulphur film accounts for nuclear core fertilizer urea quality, and the surrounding layer polymer membrane accounts for that total mass is respectively 2%, 3% behind the urea bag sulphur; The surrounding layer polymer membrane accounts for that the sulphur that is of total mass 2% adds 2% high polymer film-coated urea behind the urea bag sulphur; The surrounding layer polymer membrane accounts for 3% of total mass behind the urea bag sulphur and is sulphur and adds 3% high polymer film-coated urea.Preferably, high polymer film-coated dose is that novolac epoxy and triethylene tetramine are with the mixing of 9: 1 mass ratioes.The preparation method is referring to CN1246265C (200410024050.X) " preparation method of the high polymer film-coated controlled release fertilizer take sulphur as undercoat ", and the present invention quotes the full text of this patent document as prior art.Wherein, the preferred granular urea of nuclear core fertilizer urea, 2～3 millimeters of particle diameters.
According to the present invention, preferred, low temperature, the special-purpose slow Controlled Release Nitrogen Fertilizer of arid area crop, raw materials quality part is as follows:
95～105 parts in 5% humic acid membrane wrapping urea,
340～360 parts in 7.5% humic acid membrane wrapping urea,
290～310 parts in sulfur coating urea,
Sulphur adds 145～155 parts in 2% high polymer film-coated urea,
Sulphur adds 95～105 parts in 3% high polymer film-coated urea.
The preparation method of low temperature of the present invention, the special-purpose slow Controlled Release Nitrogen Fertilizer of arid area crop, step is as follows:
The preparation of (1) 5% humic acid membrane wrapping urea, 7.5% humic acid membrane wrapping urea:
A, extracting epoxy resin dihydroxyphenyl propane and solidifying agent T31 mix by 1: 0.1 mass ratio, get binding agent.
B, a certain amount of granular urea is put into encapsulation tool, be preheated to 60-70 ℃, binding agent with the steps A preparation under pressure evenly sprays on the urea granules of motion, forms one deck adhensive membrane, and the mass ratio that binding agent accounts for urea granules is 0.25～0.33%.
C, the solid weathered coal of pulverizing is sprayed on the urea granules of step B with binding agent, the mass ratio that weathered coal accounts for urea granules is 2.5%, forms the humic acid membrane wrapping layer after solidifying.
D, with again repetitive operation 1 time of step B, C, get 5% humic acid membrane wrapping urea; With again repetitive operation 2 times of step B, C, get 7.5% humic acid membrane wrapping urea.
(2) sulfur coating urea: by the prior art preparation, it is 20～25% that the sulphur mould material accounts for nuclear core fertilizer quality per-cent.
(3) sulphur adds 2% high polymer film-coated urea, sulphur adds 3% high polymer film-coated urea: take granular urea as nuclear core fertilizer, spray first inner cladding sulphur film, the sulphur film accounts for 18% of nuclear core fertilizer urea quality; Spray the surrounding layer polymer membrane, polymer membrane accounts for and is coated with 2% of fertiliser granulates total mass behind the sulphur, gets sulphur and adds 2% high polymer film-coated urea again; Polymer membrane accounts for and is coated with 3% of fertiliser granulates total mass behind the sulphur, gets sulphur and adds 3% high polymer film-coated urea.High polymer film-coated agent prescription is, novolac epoxy and triethylene tetramine are with the mixing of 9: 1 mass ratioes, the technology that provides by CN1246265C (200410024050.X) " preparation method of the high polymer film-coated controlled release fertilizer take sulphur as undercoat " sprays on the fertiliser granulates that is coated with behind the sulphur, and get final product.
(4) sulphur that the sulfur coating urea that the 5% humic acid membrane wrapping urea that in proportion above-mentioned steps (1) is made, 7.5% humic acid membrane wrapping urea, step (2) make, step (3) make adds 2% high polymer film-coated urea, sulphur and adds 3% high polymer film-coated urea and put into together stirrer and stirred 4～6 minutes, fully mixing and get final product.Then the fertilizer that mixes is measured, packs.
The application of low temperature of the present invention, the special-purpose slow Controlled Release Nitrogen Fertilizer of arid area crop, fertilizer amount is amounted to into purity nitrogen, and 8～12 kilograms every mu, according to the plantation characteristics of Different Crop, application process is as follows:
I. the dense planting crop adopts front disposable the spreading fertilizer over the fields behind soil surface of sowing to turn over, sow; Or,
Ii. the wider crop of Planting Row Distance is adopted disposable applying apart from 5～7 centimetres of row of sowing, in the soil of 8～10 centimetres of the earth's surface degree of depth.
Excellent results of the present invention is as follows:
1, nutrient discharges and can satisfy better the crop needs
Low temperature of the present invention, the slow Controlled Release Nitrogen Fertilizer of arid area crop are composite according to nutrient element releasing rule and the most of crop nitrogen absorption characteristics of used various coated carbamide raw materials in this area's soil, effectively adjust the total nutrient element releasing rule of fertilizer, can satisfy better the nutrition absorption needs of crop different growing.Applied once need not topdress.
2, reduce the fertiliser production cost
Generally speaking, if require a kind of nutrient element releasing rule of Controlled Release Nitrogen Fertilizer of coated fertilizer production can satisfy the Crop requirement, then need to spend higher production cost.The Controlled Release Nitrogen Fertilizer of the different coated fertilizer productions of fertilizer utilization of the present invention carries out composite, not only can satisfy the Crop requirement, also obviously reduces the production cost of fertilizer.
Description of drawings
Fig. 1 is the nutrient element releasing rule graphic representation of embodiment 1 used slow Controlled Release Nitrogen Fertilizer raw material in Chifeng soil, X-coordinate be in the incorporation of fertilizerin the soil time (my god), ordinate zou is nutrient release rate (mass percent).
Fig. 2 is the special-purpose slow nutrient releasing curve diagram of Controlled Release Nitrogen Fertilizer in Chifeng soil of embodiment 1 low temperature, arid area crop, X-coordinate be in the incorporation of fertilizerin the soil time (my god), ordinate zou is per 1000 kilograms of fertilizer nutrient burst sizes of the present invention (kilogram).
Embodiment
The present invention will be further described below in conjunction with embodiment, but be not limited to this.Raw material consumption umber among the embodiment is mass parts, and all per-cents are mass percent.Raw material used among the embodiment is as follows:
5% humic acid membrane wrapping urea is spray one layer binder outside granular urea, sprays the weathered coal of the air-dry pulverizing of one deck again, forms the humic acid membrane wrapping layer; Weathered coal accounts for 5% of granular urea quality.Shandong Kingenta Bio-engineering Stock Co., Ltd. produces and sells
7.5% humic acid membrane wrapping urea is respectively spray one layer binder outside granular urea, sprays the weathered coal of the air-dry pulverizing of one deck again, forms the humic acid membrane wrapping layer; Weathered coal accounts for 7.5% of granular urea quality.
It is 23% that sulfur coating urea, sulphur mould material account for nuclear core fertilizer quality per-cent, and Shandong Kingenta Bio-engineering Stock Co., Ltd. produces.
Sulphur adds 2% high polymer film-coated urea, sulphur, and to add 3% high polymer film-coated urea be that Shandong Kingenta Bio-engineering Stock Co., Ltd. produces, inner cladding sulphur film accounts for 18% of nuclear core fertilizer urea quality, the surrounding layer polymer membrane accounts for respectively 2% and 3% of total mass behind the urea bag sulphur, and high polymer film-coated dose is that novolac epoxy and triethylene tetramine are with the mixing of 9: 1 mass ratioes.
Above raw material Shandong Kingenta Bio-engineering Stock Co., Ltd. is on sale.
Weathered coal, surface mines coal works, Ningwu County, Shanxi Province produces, organic content 60.2wt%, particle diameter 0.15mm.
Embodiment 1: low temperature, the special-purpose slow Controlled Release Nitrogen Fertilizer of arid area crop, and raw materials quality part is as follows:
5% humic acid membrane wrapping urea 150kg,
7.5% humic acid membrane wrapping urea 310kg,
Sulfur coating urea 360kg,
Sulphur adds 2% high polymer film-coated urea 100kg,
Sulphur adds 3% high polymer film-coated urea 80kg.
The preparation method:
The preparation of (1) 5% humic acid membrane wrapping urea, 7.5% humic acid membrane wrapping urea:
5 kilograms of A, extracting epoxy resin dihydroxyphenyl propanes add 0.5 kilogram of solidifying agent T31, mix, and get binding agent;
B, get 500 kilograms of granular ureas and put into encapsulation tool, be preheated to 63 ℃, by pressure pump 1.25 kilograms of the binding agents of steps A preparation are evenly sprayed on the urea granules of motion, form one deck adhensive membrane;
C, 12.5 kilograms of even the sprayings to the urea granules of step B with binding agent of solid weathered coal that will cross 100 mesh sieves form the humic acid membrane wrapping layer after solidifying;
D, with again repetitive operation 1 time of step B, C, get 5% humic acid membrane wrapping urea;
E, get 350 kilograms in the 5% humic acid membrane wrapping urea of step D preparation, with again repetitive operation 1 time of step B, C, get 7.5% humic acid membrane wrapping urea;
(2) prepare sulfur coating urea by prior art, it is 23% that the sulphur mould material accounts for nuclear core fertilizer urea quality per-cent.
(3) sulphur adds the preparation that 2% high polymer film-coated urea, sulphur add 3% high polymer film-coated urea:
A, prepare sulfur coating urea by prior art, it is 18% that the sulphur mould material accounts for nuclear core fertilizer urea quality per-cent.
B, get 9 kilograms of novolac epoxys, add 1 kilogram of triethylene tetramine, mix, sub-polymer coating agent secures satisfactory grades;
C, the sulfur coating urea of getting steps A preparation are put into coating machine, high polymer film-coated dose of step B preparation evenly sprayed on the sulfur coating urea granules of motion, high polymer film-coated dose of mass ratio that accounts for sulfur coating urea is 2%, gets sulphur and adds 2% high polymer film-coated urea;
D, the sulfur coating urea of getting steps A preparation are put into coating machine, high polymer film-coated dose of step B preparation evenly sprayed on the sulfur coating urea granules of motion, high polymer film-coated dose of mass ratio that accounts for sulfur coating urea is 3%, gets sulphur and adds 3% high polymer film-coated urea;
(4) with above-mentioned 5% humic acid membrane wrapping urea 150kg, 7.5% humic acid membrane wrapping urea 310kg, sulfur coating urea 360kg, sulphur adds 2% high polymer film-coated urea 100kg, sulphur adds 3% high polymer film-coated urea 80kg, put into together stirrer and stirred 4 minutes, fully mixing and get final product.Then the fertilizer that mixes is measured, packs.
Embodiment 2: low temperature, the special-purpose slow Controlled Release Nitrogen Fertilizer of arid area crop, and raw materials quality part is as follows:
5% humic acid membrane wrapping urea 100kg,
7.5% humic acid membrane wrapping urea 350kg,
Sulfur coating urea 300kg,
Sulphur adds 2% high polymer film-coated urea 150kg,
Sulphur adds 3% high polymer film-coated urea 100kg.
The preparation method is with embodiment 1.
Embodiment 3: low temperature, the special-purpose slow Controlled Release Nitrogen Fertilizer of arid area crop, and raw materials quality part is as follows:
5% humic acid membrane wrapping urea 180kg,
7.5% humic acid membrane wrapping urea 250kg,
Sulfur coating urea 250kg,
Sulphur adds 2% high polymer film-coated urea 200kg,
Sulphur adds 3% high polymer film-coated urea 120kg.
Preparation method: be such as embodiment 1 difference:
The preparation of (1) 5% humic acid membrane wrapping urea, 7.5% humic acid membrane wrapping urea
Resins, epoxy dihydroxyphenyl propane and solidifying agent T31 mix by 1: 0.1 mass ratio, get binding agent;
Get 200 kilograms of granular ureas and put into encapsulation tool, be preheated to 70 ℃, by pressure pump 0.66 kilogram of the binding agent of steps A preparation is evenly sprayed on the urea granules of motion, form one deck adhensive membrane; With crossing 5 kilograms of even sprayings to the urea granules of step B with binding agent of solid weathered coal of 100 mesh sieves, form the humic acid membrane wrapping layer after solidifying; Repetitive operation is 1 time again, gets 5% humic acid membrane wrapping urea;
Other gets 300 kilograms of granular ureas and puts into encapsulation tool, is preheated to 68 ℃, 1 kilogram of described binding agent is evenly sprayed on the urea granules of motion by pressure pump, forms one deck adhensive membrane; With crossing 7.5 kilograms of even sprayings to the urea granules with binding agent of solid weathered coal of 100 mesh sieves, form the humic acid membrane wrapping layer after solidifying; Repetitive operation is 2 times again, gets 7.5% humic acid membrane wrapping urea;
All the other raw material preparations are with embodiment 1.
With above-mentioned 5% humic acid membrane wrapping urea 180kg, 7.5% humic acid membrane wrapping urea 250kg, sulfur coating urea 250kg, sulphur adds 2% high polymer film-coated urea 200kg, sulphur adds 3% high polymer film-coated urea 120kg, put into together stirrer and stirred 6 minutes, fully mixing and get final product.Then the fertilizer that mixes is measured, packs.
Embodiment 4: low temperature, the special-purpose slow Controlled Release Nitrogen Fertilizer of arid area crop, and raw materials quality part is as follows:
5% humic acid membrane wrapping urea 130kg,
7.5% humic acid membrane wrapping urea 330kg,
Sulfur coating urea 320kg,
Sulphur adds 2% high polymer film-coated urea 180kg,
Sulphur adds 3% high polymer film-coated urea 40kg.
The preparation method is with embodiment 3.
Comparative Examples: common urea, nitrogen content 46%, mass percent.
The effect of above embodiment 1～4 and Comparative Examples is as follows:
Test site: Qing'an County, Heilongjiang Province, Xinjiang autonomous region Changji City.
Test period: year October in May, 2011 to 2011.
For studying thing and kind: the Qing'an County is corn, corn variety: elder generation beautiful 335; The Changji City is cotton, cotton variety: new land early No. 23.
Embodiment 1-4 is identical with Comparative Examples fertilizer nitrogen nutrient consumption, 12 kilograms every mu of corns, 8 kilograms every mu in cotton.Embodiment Term Fertilization method is, disposable applying in dark approximately 8 centimetres the soil of approximately 6 centimetres of distance sowing row, liftoff surface when corn and sowing cotton seed.The fertilizing method of Comparative Examples common urea is that corn imposed in " typhon mouth " phase; Cotton, 30% uses with method with phosphorus, potash fertilizer, and the urea fertilizer of surplus imposes in cotton " full-bloom stage ".When use in the land for growing field crops, the Compositional type sustained/controlled release urea of embodiment 1-4 and the experimental group of Comparative Examples common urea are all joined and are executed phosphate fertilizer and potash fertilizer, corn is by nitrogen: Vanadium Pentoxide in FLAKES: potassium oxide=1: 0.3: 0.6, cotton are by nitrogen: Vanadium Pentoxide in FLAKES: potassium oxide=1: 0.4: 0.3 nutrient quality matches well and executes phosphate fertilizer and potash fertilizer, phosphate fertilizer is with calcium superphosphate, potash fertilizer Repone K, and the phosphate fertilizer of embodiment and Comparative Examples and potash fertilizer all are disposablely before plantation is ploughed evenly to spread fertilizer over the fields in the earth's surface.Other control measures are identical.Effect sees Table 1.
Table 1. is compared the application effect of embodiment 1-4 with Comparative Examples
Claims (4)
1. Controlled Release Nitrogen Fertilizer is delayed in low temperature, the special use of arid area crop, it is characterized in that raw materials quality part is as follows:
Described 5% humic acid membrane wrapping urea, 7.5% humic acid membrane wrapping urea are respectively that spray one layer binder sprays the weathered coal of the air-dry pulverizing of one deck again outside granular urea, forms the humic acid membrane wrapping layer; Repeat coating after solidifying and make for 1～2 time, described binding agent total amount account for the granular urea quality 0.5～1%, weathered coal accounts for 5%, 7.5% of granular urea quality;
Described sulfur coating urea is that it is 20～25% that the sulphur mould material accounts for nuclear core fertilizer urea quality per-cent take granular urea as nuclear core fertilizer spraying sulphur film;
Described sulphur adds 2% high polymer film-coated urea, sulphur adds 3% high polymer film-coated urea and is, take granular urea as nuclear core fertilizer, sprays first inner cladding sulphur film respectively, sprays the surrounding layer polymer membrane again and makes; Wherein, inner cladding sulphur film accounts for 18% of nuclear core fertilizer urea quality, and the surrounding layer polymer membrane accounts for 2%, 3% of total mass behind the urea bag sulphur; Described high polymer film-coated dose is that novolac epoxy and triethylene tetramine are with the mixing of 9: 1 mass ratioes.
2. Controlled Release Nitrogen Fertilizer is delayed in low temperature as claimed in claim 1, the special use of arid area crop, it is characterized in that raw materials quality part is as follows:
3. the preparation method of Controlled Release Nitrogen Fertilizer is delayed in claim 1 or 2 described low temperature, the special use of arid area crop, and step is as follows:
The preparation of (1) 5% humic acid membrane wrapping urea, 7.5% humic acid membrane wrapping urea:
A, extracting epoxy resin dihydroxyphenyl propane and solidifying agent T31 mix by 1: 0.1 mass ratio, get binding agent;
B, a certain amount of granular urea is put into encapsulation tool, be preheated to 60-70 ℃, evenly spray on the urea granules of motion by the binding agent of pressure pump with the steps A preparation, form one deck adhensive membrane, the mass ratio that binding agent accounts for urea granules is 0.25～0.33%;
C, the solid humic acids is sprayed on the urea granules of step B with binding agent, the mass ratio that humic acids accounts for urea granules is 2.5%, forms the humic acid membrane wrapping layer after solidifying;
D, with again repetitive operation 1 time of step B, C, get 5% humic acid membrane wrapping urea; With again repetitive operation 2 times of step B, C, get 7.5% humic acid membrane wrapping urea;
(2) sulfur coating urea: by the prior art preparation, it is 20～25% that the sulphur mould material accounts for nuclear core fertilizer quality per-cent;
(3) sulphur adds 2% high polymer film-coated urea, sulphur adds 3% high polymer film-coated urea: take granular urea as nuclear core fertilizer, spray first inner cladding sulphur film, the sulphur film accounts for 18% of nuclear core fertilizer urea quality; Spray the surrounding layer polymer membrane, polymer membrane accounts for and is coated with 2% of fertiliser granulates total mass behind the sulphur, for sulphur adds 2% high polymer film-coated urea again; Polymer membrane accounts for and is coated with 3% of fertiliser granulates total mass behind the sulphur, gets sulphur and adds 3% high polymer film-coated urea; High polymer film-coated agent prescription is that novolac epoxy and triethylene tetramine are with the mixing of 9: 1 mass ratioes;
(4) sulphur that the sulfur coating urea that the 5% humic acid membrane wrapping urea that in proportion above-mentioned steps (1) is made, 7.5% humic acid membrane wrapping urea, step (2) make, step (3) make adds 2% high polymer film-coated urea, sulphur and adds 3% high polymer film-coated urea and put into together stirrer and stirred 4～6 minutes, fully mixing and get final product.
4. the application of claim 1 or 2 described low temperature, the special-purpose slow Controlled Release Nitrogen Fertilizer of arid area crop, fertilizer amount is amounted to into purity nitrogen, and 8～12 kilograms every mu, application process is as follows:
I. the dense planting crop adopts front disposable the spreading fertilizer over the fields behind soil surface of sowing to turn over, sow; Or,
The wider crop of ii Planting Row Distance is adopted disposable applying apart from 5～7 centimetres of row of sowing, in the soil of 8～10 centimetres of the earth's surface degree of depth.
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| CN102173933A (en) * | 2011-01-19 | 2011-09-07 | 菏泽金正大生态工程有限公司 | Special ginger controlled-release fertilizer for preventing and controlling soil-borne diseases as well as preparation and application thereof |
| CN102173961A (en) * | 2010-12-23 | 2011-09-07 | 菏泽金正大生态工程有限公司 | Disease-preventing type controlled release fertilizer special for Xinjiang cotton, and preparation method and application thereof |
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| CN102173961A (en) * | 2010-12-23 | 2011-09-07 | 菏泽金正大生态工程有限公司 | Disease-preventing type controlled release fertilizer special for Xinjiang cotton, and preparation method and application thereof |
| CN102173933A (en) * | 2011-01-19 | 2011-09-07 | 菏泽金正大生态工程有限公司 | Special ginger controlled-release fertilizer for preventing and controlling soil-borne diseases as well as preparation and application thereof |
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