CN1300069C - Coated slow releasing fertilizer and its prepn - Google Patents
Coated slow releasing fertilizer and its prepn Download PDFInfo
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- CN1300069C CN1300069C CNB2005101042267A CN200510104226A CN1300069C CN 1300069 C CN1300069 C CN 1300069C CN B2005101042267 A CNB2005101042267 A CN B2005101042267A CN 200510104226 A CN200510104226 A CN 200510104226A CN 1300069 C CN1300069 C CN 1300069C
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- fertilizer
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- urea
- slow releasing
- slow release
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
- Y02P60/20—Reduction of greenhouse gas [GHG] emissions in agriculture, e.g. CO2
- Y02P60/21—Dinitrogen oxide [N2O], e.g. using aquaponics, hydroponics or efficiency measures
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Abstract
The present invention relates to a coating slow release fertilizer and a preparation method thereof, which belongs to the technical field of slow release fertilizers. The slow release fertilizer comprises the components of urea or nitrogen, phosphate and potash fertilizers, urease inhibitors, lightly burnt magnesia, fused calcium magnesium phosphate, zinc oxide, humic acid and refined bentonite. All the components are put in a pelletizing disc, and the water solution of sulfuric acid is sprayed; film-coating materials are all coated on the surfaces of urea granules, and the coating slow release fertilizer can be obtained through further cold wind treatment and sieving. The slow release of the nutrients of the slow release fertilizer the present invention is controlled, disposable fertilizer application can meet the growth of crops, fertilizer consumption is reduced, environmental pollution caused by the fertilizer is effectively avoided, and soil is improved so as to prevent soil from being hardened.
Description
(1) technical field
The present invention relates to a kind of coated slow releasing fertilizer and preparation method thereof, belong to the slow release fertilizer technical field.
(2) background technology
Macroelement chemical fertilizer is compound soluble in water, and the principal item of nitrogenous fertilizer has urea, ammonium sulfate, ammonium chloride and bicarbonate of ammonia etc.Nitrogenous fertilizer is applied to very easily loss behind the soil, loss by way of drip washing, gas loss and fixing are arranged, the utilization ratio of nitrogenous fertilizer has only about 30%, a large amount of losses.Phosphate fertilizer is applied to behind the soil easily by soil fixing, even produces loss by drip washing and runoff, and utilization ratio has only about 20%.Potash fertilizer also can produce loss by drip washing and runoff in soil, its utilization ratio is high slightly, also has only about 35%.Fertilizer loss is except that causing waste, and serious environment pollution reduces quality of agricultural product simultaneously.Improve utilization rate of fertilizer, to become extensive concern emphasis problem.
Have multiple technologies can improve utilization rate of fertilizer at present, release rate and fertilizer by coating control fertilizer contact with the direct of soil, are one of effective meanss.Existing a large amount of patented technologies realizes the production of film fertilizer, and, be coated fertilizer mostly with the organic polymer, adopt the fluidization coating, wherein patent 200410078165.7,01133415.0,02155568.0 200410024049.7 is exactly the typical example of domestic patent.Organic polymer fluidized-bed film-coating technique is produced sustained-controll-release fertiliser and is had many-sided defective, shows that mainly the production cost of fertilizer is too high, and equipment has high input.
(3) summary of the invention
The present invention is directed to the deficiencies in the prior art, a kind of coated slow releasing fertilizer and preparation method thereof is provided, cost is low, manufacture method is easy, the fertilizer release rate can effectively be controlled.
Coated slow releasing fertilizer of the present invention, component is as follows, is weight part:
90～110 parts of urea or azophoska
0.2～1.0 part of urease inhibitor
2～6 parts of magnesia unslackeds
5～10 parts in common fused(calcium magnesium)phosphate
3～8 parts in zinc oxide
4～10 parts of refining wilkinites
0～10 part of humic acids.
Coated slow releasing fertilizer preferred ingredient of the present invention is as follows, is weight part:
One, coated carbamide
90～110 parts in urea
0.5～1.0 part of urease inhibitor
2～6 parts of magnesia unslackeds
5～10 parts in common fused(calcium magnesium)phosphate
3～8 parts in zinc oxide
4～10 parts of refining wilkinites.
Two, coated compound fertilizer.
Azophoska 90～110 weight parts
0.2～0.5 part of urease inhibitor
2～6 parts of magnesia unslackeds
5～10 parts in common fused(calcium magnesium)phosphate
3～8 parts in zinc oxide
5～10 parts of refining wilkinites
5～10 parts of humic acidss.
Above-mentioned urea is common urea or granular urea.Common urea is a commercial fertilizer urea common on the market, and granular urea is diameter 2～4mm commercial fertilizer urea;
Above-mentioned azophoska is plain particles composite fertilizer or the compound fertilizer of nitrogenous phosphorus potassium more than 35%.Be commercially available common composite fertilizer or compound fertilizer.
Above-mentioned urease inhibitor is the commercial goods, is Dyhard RU 100 and quinhydrones by 1: 1 mixture, crosses 120 mesh sieves.
Above-mentioned magnesia unslacked is the commercial goods, is that magnesite is fired a kind of mixture based on magnesium oxide that forms, and crosses 200 mesh sieves.
Above-mentioned common fused(calcium magnesium)phosphate is the commercial goods, contains Vanadium Pentoxide in FLAKES 12%～14%;
Above-mentioned zinc oxide is the industrial oxidation zinc of content more than 98%, crosses 200 mesh sieves;
Above-mentioned humic acids is agricultural fulvo acid;
Above-mentioned refining wilkinite was 200 mesh sieve wilkinites, the commercial goods.
The content of the above each raw material is mass percent.
The preparation method of coated slow releasing fertilizer of the present invention, step is as follows:
(1) elder generation puts into urea or azophoska on the granulation dish of compound fertilizer, open rotating disk, add urease inhibitor, magnesia unslacked, fused(calcium magnesium)phosphate, zinc oxide, humic acids and refining wilkinite then in proportion, spray the aqueous sulfuric acid of quality 30% content simultaneously, the spray flux of this aqueous sulfuric acid is accounting for 6%～9% of slow release fertilizer gross weight, and coated fertilizer all is wrapped in urea or azophoska particulate surface.
(2) urea of handling through coating or azophoska compound fertilizer enter cooling cylinder and carry out air-cooled processing, sieve, and promptly get coated slow releasing fertilizer.
(3) packing detects and dispatches from the factory.
The preparation method of above-mentioned coated slow releasing fertilizer coating operation continuously needn't all be cleared up by every dish.
Be coated slow releasing fertilizer release rate test situation of the present invention below.
The slow-release indoor test-results shows: 1, the common urea several minutes can all dissolve in water, and the whole strippings of coated slow releasing urea nutrient of the present invention need 56 hours; 2, common composite fertilizer or compound fertilizer can all dissolve in 20～30 minutes in water, and the whole strippings of coated slow releasing composite fertilizer of the present invention or compound fertilizer nutrient need 80～100 hours.
The slowly-releasing test-results shows under the natural soils moisture condition of field: coated slow releasing urea nutrient time of releasing was at 120～150 days, be 2.0～3.0 times of common urea nutrient time of releasing, the time of releasing of coated slow releasing urea nutrient in soil is relevant with soil water content, the soil moisture and crop growth conditions.Coated slow releasing composite fertilizer or compound fertilizer nutrient time of releasing is at 200～260 days, is common composite fertilizer or compound fertilizer nutrient time of releasing 1.8～2.4 times.
Be coated slow releasing fertilizer of the present invention field effect below.
Two kinds of coated slow releasing fertilizers have been carried out field test on staple crops, test shows: coated slow releasing urea once topdresses on wheat, corn and cotton and can satisfy the nutrient demand of crop whole growing substantially, on vegetative period such as fruit tree and vegetables long crops, reduce the number of times that topdresses time of releasing according to the nutrient of fertilizer; Compare with common urea under nutrient reduces by 20%～40% situation and still reach same effect; When applying fertilizer equally with common urea, crop yield improves 15%～35%; The utilization rate of fertilizer of comparing coated slow releasing urea with common urea improves 30%～60%; Use the quality of coated slow releasing urea agricultural-food to significantly improve.Coated slow releasing composite fertilizer uses a base manure to get final product on wheat, corn, cotton and vegetables, if the nutrient proportioning of compound fertilizer is suitable, can not impose nitrogenous fertilizer; Compare with compound fertilizer under nutrient reduces by 15%～35% situation with common composite fertilizer and still to reach same effect; During with common composite fertilizer and the same fertilising of compound fertilizer, crop yield improves 12%～30%; The utilization rate of fertilizer of comparing coated slow releasing compound fertilizer with common composite fertilizer with compound fertilizer improves 25%～50%; Use the quality of the fertile agricultural-food of coated slow releasing composite fertilizer and compound to significantly improve.
Compare with common urea, composite fertilizer or other coated fertilizer, the present invention has following excellent results:
1, production method is simple, and production cost is low, is easy to realize;
2, the nutrient of fertilizer slowly discharges and is controlled, and single fertilization can satisfy plant growth, reduces the fertilising cost, has alleviated the destruction to the soil;
3, reduce fertilizer amount, improved fertilizer utilization ratio, saved fertilizer cost, can effectively prevent the pollution of fertilizer environment;
4, can significantly improve crop yield, improve quality of agricultural product;
5, can improve the soil, keep soil from packing together, after common fertilizer is manured into soil, a large amount of base cations, as: K
+, NH
+ 4Ca on the soil clay particle goes to replace
2+And Mg
2+, destroyed Soil structure, cause soil compaction, controllable release fertilizer K
+, NH
4Slowly discharge, avoided the generation of this problem;
6, the harm of avoiding applying fertilizer and causing is applied fertilizer excessive or the unreasonable normal generation fertilizer damage that applies fertilizer, and controllable release fertilizer has been avoided the appearance of high salinity, can not form the excessive or unreasonable fertilizer damage that causes that applies fertilizer of fertilising.
(4) embodiment
The present invention will be further described below in conjunction with embodiment.
Embodiment 1: get in the compound fertilizer pelletizing dish of 2.5 meters of 400 kilograms of addings of common urea diameters, open granulation dish (normal speed), add 22 kilograms of 3.0 kilograms of urease inhibitors, 15.0 kilograms of magnesia unslackeds, 30.0 kilograms in common fused(calcium magnesium)phosphate, 3.0 kilograms in zinc oxide and refining wilkinites; The aqueous sulfuric acid of spray quality 30% content is until the surface that coated fertilizer all is wrapped in urea granules.The urea that coating is handled enters 1.8 meters of diameters, and long 12 meters cooling cylinder carries out air-cooled processing, after the fertilizer that cooling cylinder comes out sieves, promptly gets coated slow releasing fertilizer.
Embodiment 2: get in the compound fertilizer pelletizing dish of 2.5 meters of 400 kilograms of addings of granular urea diameters, open granulation dish (normal speed), add 25 kilograms of 2.6 kilograms of urease inhibitors, 16.0 kilograms of magnesia unslackeds, 32.0 kilograms in common fused(calcium magnesium)phosphate, 3.5 kilograms in zinc oxide and refining wilkinites; The aqueous sulfuric acid of spray quality 30% content is until the surface that coated fertilizer all is wrapped in urea granules.The urea that coating is handled enters 1.8 meters of diameters, and long 12 meters cooling cylinder carries out air-cooled processing, after the fertilizer that cooling cylinder comes out sieves, promptly gets coated slow releasing fertilizer.
Embodiment 3: 400 kilograms of composite fertilizer's mass percents (wherein nitrogen, phosphorus, potassium are respectively 15%, 8%, 12%) of getting N-P-K content 35% add in the compound fertilizer pelletizing dish of 2.5 meters of diameters, open granulation dish (normal speed), add 20.0 kilograms of 1.2 kilograms of urease inhibitors, 12.0 kilograms of magnesia unslackeds, 24.0 kilograms in common fused(calcium magnesium)phosphate, 2.0 kilograms in zinc oxide and refining wilkinites; The aqueous sulfuric acid of spray quality 30% content is until coated fertilizer all being wrapped in nitrogen-phosphorus-potassium compound fertilizer particulate surface.The composite fertilizer that coating is handled enters 1.8 meters of diameters, and long 12 meters cooling cylinder carries out air-cooled processing, promptly gets coated slow releasing fertilizer after the fertilizer that cooling cylinder comes out sieves.
Embodiment 4: 400 kilograms of composite fertilizer'ss (wherein nitrogen, phosphorus, potassium are respectively 15%, 15%, 15%) of getting N-P-K content 45% mass percent add in the compound fertilizer pelletizing dish of 2.5 meters of diameters, open granulation dish (normal speed), add 20.0 kilograms of 1.4 kilograms of urease inhibitors, 12.0 kilograms of magnesia unslackeds, 20.0 kilograms in common fused(calcium magnesium)phosphate, 1.8 kilograms in zinc oxide and refining wilkinites; The aqueous sulfuric acid of spray quality 30% content is until the surface that coated fertilizer all is wrapped in compound fertilizer granules.The composite fertilizer that coating is handled enters 1.8 meters of diameters, and long 12 meters cooling cylinder carries out air-cooled processing, can pack after the fertilizer that cooling cylinder comes out sieves to detect to dispatch from the factory.
Claims (4)
1. coated slow releasing fertilizer is characterized in that, component is as follows, is weight part:
90～110 parts of urea or azophoska
0.2～1.0 part of urease inhibitor
2～6 parts of magnesia unslackeds
5～10 parts in common fused(calcium magnesium)phosphate
3～8 parts in zinc oxide
4～10 parts of refining wilkinites
0～10 part of humic acids.
2. coated slow releasing fertilizer as claimed in claim 1 is characterized in that component is as follows, is weight part:
90～110 parts in urea
0.5～1.0 part of urease inhibitor
2～6 parts of magnesia unslackeds
5～10 parts in common fused(calcium magnesium)phosphate
3～8 parts in zinc oxide
4～10 parts of refining wilkinites.
3. coated slow releasing fertilizer as claimed in claim 1 is characterized in that component is as follows, is weight part:
Azophoska 90～110 weight parts
0.2～0.5 part of urease inhibitor
2～6 parts of magnesia unslackeds
5～10 parts in common fused(calcium magnesium)phosphate
3～8 parts in zinc oxide
5～10 parts of refining wilkinites
5～10 parts of humic acidss.
4. according to the preparation method of one of claim 1-3 described coated slow releasing fertilizer, step is as follows:
(1) elder generation puts into urea or nitrogen-phosphorus-potassium compound fertilizer on the granulation dish of compound fertilizer, open rotating disk, add urease inhibitor, magnesia unslacked, fused(calcium magnesium)phosphate, zinc oxide, humic acids and refining wilkinite then in proportion, spray the aqueous sulfuric acid of quality 30% content simultaneously, the spray flux of this aqueous sulfuric acid accounts for 6%～9% of slow release fertilizer gross weight, and coated fertilizer all is wrapped in urea or nitrogen-phosphorus-potassium compound fertilizer particulate surface;
(2) urea of handling through coating enters cooling cylinder and carries out air-cooled processing, sieves, and promptly gets coated slow releasing fertilizer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101042267A CN1300069C (en) | 2005-10-11 | 2005-10-11 | Coated slow releasing fertilizer and its prepn |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101042267A CN1300069C (en) | 2005-10-11 | 2005-10-11 | Coated slow releasing fertilizer and its prepn |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1772715A CN1772715A (en) | 2006-05-17 |
| CN1300069C true CN1300069C (en) | 2007-02-14 |
Family
ID=36759878
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005101042267A Expired - Fee Related CN1300069C (en) | 2005-10-11 | 2005-10-11 | Coated slow releasing fertilizer and its prepn |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1300069C (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101508610B (en) * | 2009-03-24 | 2012-06-13 | 吕庆淮 | Environmental friendly sustained-release long-acting compound fertilizer and method of preparing the same |
| CN101885635B (en) * | 2009-05-14 | 2012-02-01 | 张希纯 | Preparation method of biological controlled-released fertilizer |
| CN101885646B (en) * | 2009-05-14 | 2013-03-06 | 张希纯 | Biological slow-released urea and preparation method thereof |
| CN102060594A (en) * | 2009-05-22 | 2011-05-18 | 武汉思迈拓科技有限公司 | Composite slow release fertilizer |
| CN102515980B (en) * | 2011-12-06 | 2013-11-20 | 中国农业科学院农业资源与农业区划研究所 | Organic matter coated urea and production method thereof |
| CN102515878B (en) * | 2011-12-20 | 2014-07-16 | 河北农业大学 | Cotton slow-release fertilizer and application method thereof |
| CN103601601A (en) * | 2013-11-12 | 2014-02-26 | 丹阳市清云农业发展有限公司 | Novel coated controlled release fertilizer and preparation method thereof |
| CN104355891A (en) * | 2014-11-19 | 2015-02-18 | 柳州市潮林机械有限公司 | Special fertilizer for zephyranthes candida |
| WO2017081183A1 (en) * | 2015-11-12 | 2017-05-18 | Yara International Asa | Improved urea-based blend composition and method for the manufacture thereof |
| CN106748194A (en) * | 2016-12-28 | 2017-05-31 | 贵州大学 | A kind of slow-release fertilizer and preparation method for suppressing soil urease liveness |
| CN109496730A (en) * | 2018-12-24 | 2019-03-22 | 吉林农业大学 | A kind of fertilizer and fertilizing method of Central Jilin spring maize single fertilization |
| CN110981628A (en) * | 2019-12-12 | 2020-04-10 | 中化农业（临沂）研发中心有限公司 | Wrapping layer, outer wrapping type medium trace element-containing fertilizer with wrapping layer and preparation method of outer wrapping type medium trace element-containing fertilizer |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0161395B1 (en) * | 1984-05-07 | 1993-03-31 | Schering Aktiengesellschaft | Leaf fertilizer having a controlled, long lasting activity |
| CN1380272A (en) * | 2001-04-11 | 2002-11-20 | 北京丰霈生化科技研究所有限公司 | Long-acting water-retaining complex fertilizer and its preparation method and special-purpose equipment |
-
2005
- 2005-10-11 CN CNB2005101042267A patent/CN1300069C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0161395B1 (en) * | 1984-05-07 | 1993-03-31 | Schering Aktiengesellschaft | Leaf fertilizer having a controlled, long lasting activity |
| CN1380272A (en) * | 2001-04-11 | 2002-11-20 | 北京丰霈生化科技研究所有限公司 | Long-acting water-retaining complex fertilizer and its preparation method and special-purpose equipment |
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| Publication number | Publication date |
|---|---|
| CN1772715A (en) | 2006-05-17 |
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Granted publication date: 20070214 Termination date: 20131011 |