CN1506337A - Controlled release fertilizer - Google Patents
Controlled release fertilizer Download PDFInfo
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- CN1506337A CN1506337A CNA021280134A CN02128013A CN1506337A CN 1506337 A CN1506337 A CN 1506337A CN A021280134 A CNA021280134 A CN A021280134A CN 02128013 A CN02128013 A CN 02128013A CN 1506337 A CN1506337 A CN 1506337A
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- fertilizer
- trimeric cyanamide
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- phosphate
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Abstract
The controlled release fertilizer is produced with solid side product from melamine, quick-acting nitrogen fertilizer, phosphate fertilizer, potash fertilizer, trace element fertilizer and soil amending agent, and through pelletizing. The aim of controlling the release of nutrients is reached through regulating fertilizer components. The controlled release fertilizer has low cost and good release controlling effect.
Description
The present invention relates to produce the solid by-product of trimeric cyanamide, the invention still further relates to sustained release fertilizer.
Producing the solid by-product that trimeric cyanamide produces, be commonly called as OAT, mainly contain trimeric cyanamide and hydrolysate cyanuramide, cyanurodiamide, tricyanic acid, diatomite etc., is the white solid that contains 65～70% moisture content.Bring serious environmental to pollute its direct discharging; Because its impurity and water content are higher, it is infeasible economically to reclaim major product.
Trimeric cyanamide and hydrolysate cyanuramide, cyanurodiamide, tricyanic acid etc. are the nitrogenous compounds that is slightly soluble in water, impose on soil, can continue under water and microbial process for nitrogen.They are used as slow-release fertilizer a large amount of reports and patented technology abroad.U.S. Pat 5139555 told about trimeric cyanamide and hydrolysate cyanuramide, cyanurodiamide, tricyanic acid and trimeric cyanamide production of inorganic particle slow-release fertilizer granulation process, application process, be applied to useful application effect of food crop, root crop, fruits crop, fodder crop etc. and the unusual effect that produces with the instant nitrogenousfertilizer composite application.This patent is a raw material with fine chemical products such as trimeric cyanamides directly, and its price is 6～7 times of urea price, causes slow-release fertilizer on the high side.
Sustained release fertilizer is a kind of fertilizer that can control slow release plant nutrient substance.
For improving fertilizer utilization ratio, people's pay attention to day by day is developed a kind of compound manure, and its contained plant nutrient mass-energy is slowly discharged in specific time, and its rate of release can need fertile curve consistent with crop growth period.
At present, release fertilizer mainly contains following 4 classes both at home and abroad: (1) is slightly soluble in the synthetic organic nitrogen compound of water, as urea aldehyde, IBDU, oxamide etc.(2) slightly water-soluble or citric acid dissolubility synthesizing inorganic fertilizer contain magnesium-phosphorus fertilizer, divalent metal ammonium phosphate sylvite etc. as secondary calcium phosphate, fusion.(3) finished natural organic fertilizer material is as ammonification humic acids, agricultural wastes etc.(4) coating (parcel) type fertilizer is as sulfur coated urea, polymer coated fertilizer, fertilizer Wrapped fertilizer, agriculture and industry waste or active mineral Wrapped fertilizer etc.Because the complicacy of cost of material and technology, release fertilizer price is 2～10 times of common fertilizer, has limited its widespread use on agricultural.
One of purpose of the present invention provides the reasonable use approach with regard to being for the solid by-product of trimeric cyanamide.
It is a kind of inexpensive that two of purpose of the present invention just is to provide, and can satisfy crop needs release and release control fertilizer.
Produce the solid by-product of trimeric cyanamide, mainly contain trimeric cyanamide and hydrolysate cyanuramide, cyanurodiamide, tricyanic acid, be the white solid that contains 65～70% moisture content, it consists of: 25～35% trimeric cyanamides, 30～40% cyanuramides, 10～20% cyanurodiamides, 10～20% diatomite, 0～1% tricyanic acid, (by weight, butt), nitrogenous about 40～50%.Because its water content is higher, and rerum natura is more sticking, make troubles for transportation and secondary processing, therefore be dried earlier to moisture 0～15%.
Because the nitrated cycle of trimeric cyanamide and hydrolysate is long, slow in degraded in soil, it is few to use the initial stage liberating nitrogen separately, can not satisfy the demand of crop to nutritive element.By with itself and instant nitrogenousfertilizer, phosphate fertilizer, potash fertilizer, trace element fertilizer, soil conditioner is composite uses, quick-acting fertilizer dissolving earlier provides nutrient, the solid by-product of trimeric cyanamide continues to discharge nitrogen under water and microbial process; The ratio that the solid by-product of trimeric cyanamide accounts for is big more, and the deenergized period of nitrogen is long more; Prior, trimeric cyanamide and hydrolysate and instant nitrogenousfertilizer are composite to be used, and can suppress the release of instant nitrogenousfertilizer nitrogen, improves the application effect of instant nitrogenousfertilizer, produces unusual effect.Therefore, by adjusting the ratio of trimeric cyanamide solid by-product and instant nitrogenousfertilizer, the release of control nitrogen reaches the purpose that the control nutrient discharges.
Powdered fertilizer is directly used, and exists to use inhomogeneously, should adhere to crop leaf and causes burning shortcoming such as seedling, is made generally in particle and uses.The solid by-product of trimeric cyanamide mixes with instant nitrogenousfertilizer, phosphate fertilizer, potash fertilizer, trace element fertilizer, soil conditioner, adopts conventional compound fertilizer pelletizing equipment, makes controlled release fertilizer as rotary drum granulator, Squeezinggranulator, granulating disc granulating and forming.
According to general crop fertilizer requirement, release and release control fertilizer contains following component (by weight percentage):
The solid by-product of trimeric cyanamide: 10～95%
Instant nitrogenousfertilizer 0～90%
Phosphate fertilizer 0～50%
Potash fertilizer 0～50%
Trace element fertilizer 0～1%
Soil conditioner 0～40%
Preferably, release and release control fertilizer contain following component (by weight percentage):
The solid by-product of trimeric cyanamide: 20～60%
Instant nitrogenousfertilizer 10～50%
Phosphate fertilizer 10～30%
Potash fertilizer 10～30%
Trace element fertilizer 0～5%
Soil conditioner 0～5%
Wherein the solid by-product of trimeric cyanamide makes by producing the direct solid by-product drying that produces of trimeric cyanamide; Instant nitrogenousfertilizer is a kind of or mixture in urea, ammonium nitrate, the sulphur ammonium.Phosphate fertilizer is a kind of or mixture in ammonium phosphate, calcium superphosphate, fused(calcium magnesium)phosphate, the white fertilizer.A kind of or mixture in Repone K, the vitriolate of tartar.Trace element fertilizer is a kind of or mixture in iron fertilizer, manganese fertilizer, copper fertilizer, zinc fertilizer, boron fertilizer, the molydbenum fertilizer.Soil conditioner is a kind of or mixture in wilkinite, the zeolite.
Under the preparation method of controlled release fertilizer of the present invention:
With dried trimeric cyanamide solid by-product, instant nitrogenousfertilizer, phosphate fertilizer, potash fertilizer, trace element fertilizer separated pulverizing, mix, again through granulating and forming, drying, make controlled release fertilizer.
The present invention find for the solid by-product of trimeric cyanamide rationally utilizes one can good approach; The controlled release fertilizer that the present invention produces is made with slow released fertilizer is composite by quick-acting fertilizer, can provide comprehensive, persistent nutrition for crop, satisfies the needs of crop growth, can continue to reduce fertilizer application frequency for nitrogen, the saving labor force for crop; This controlled release fertilizer nutrient discharges evenly, can improve crop yield and quality; This controlled release fertilizer is made by the solid by-product of producing trimeric cyanamide, and cost is lower, is used for farm crop and will produces considerable economic;
Embodiment one
Solid by-product, urea, monoammonium phosphate, white fertilizer, Repone K, ferrous sulfate, zinc sulfate, the borax of dried trimeric cyanamide are milled to below the 0.1mm respectively.
With the solid by-product of the trimeric cyanamide after levigate, urea, monoammonium phosphate, white fertilizer, Repone K, ferrous sulfate+zinc sulfate+borax, wilkinite by weight the percentage ratio meter be respectively: 50%, 15%, 15%, 5%, 12%, 1%, 2% mixed is even, adopt extruder grain, obtain long 5mm, diameter 1mm, nutrient are 30-8-7 cylindrical pellet fertilizer.
This controlled release fertilizer is applied to the lawn, but only executes disposable fertilizer half a year, and makes the lawn keep persistent green period, chromaticness beauty, strong, higher density and the homogeneity of disease resistance.
Embodiment two
Solid by-product, urea, monoammonium phosphate, white fertilizer, Repone K, ferrous sulfate, zinc sulfate, the borax of dried trimeric cyanamide is broken respectively.The solid by-product of trimeric cyanamide, urea, monoammonium phosphate, white fertilizer, Repone K, ferrous sulfate+zinc sulfate+borax, zeolite percentage ratio meter by weight are respectively: 20%, 9%, 25%, 13%, 25%, 0.5%, 7.5% mixed is even, adopt the disk granulation, drying obtains granularity 1-4mm, and nutrient is the 15-15-15 granulated fertilizer.
This controlled release fertilizer is applied to flowers, can make leaf, pattern pool beauty, longer blooming period, and folding, fertilizer application frequency reduces.
Embodiment three
Solid by-product, urea, monoammonium phosphate, fused(calcium magnesium)phosphate, vitriolate of tartar, ferrous sulfate, zinc sulfate, the borax of dried trimeric cyanamide is broken respectively.The solid by-product of trimeric cyanamide, urea, monoammonium phosphate, fused(calcium magnesium)phosphate, vitriolate of tartar, ferrous sulfate+zinc sulfate+borax, wilkinite percentage ratio meter by weight are respectively: 19%, 20%, 12%, 14%, 30%, 0.7%, 5% mixed is even, adopting drum granulating, drying to obtain granularity is 1-4mm, and nutrient is 18-7～15 granulated fertilizers.
This controlled release fertilizer is applied to grape, compares with conventional fertilizer application, and annual fertilizer application frequency reduces 2～3 times, and every strain resultant string number and every string weight increase, and grape leaf, stem do not overgrow, and vintage has increased about 10%, and grape sugar degree and color improve.
Embodiment four
With the solid by-product of dried trimeric cyanamide, urea, monoammonium phosphate, fused(calcium magnesium)phosphate, Repone K, ferrous sulfate, zinc sulfate, borax respectively after the fragmentation, the solid by-product of trimeric cyanamide, urea, monoammonium phosphate, fused(calcium magnesium)phosphate, Repone K, ferrous sulfate+zinc sulfate+borax, wilkinite percentage ratio meter by weight are respectively: 10%, 13%, 18%, 18%, 14%, 1%, 26% mixed is even, adopting drum granulating, drying to obtain granularity is 1-4mm, and nutrient is the 12-10-8 granulated fertilizer.
This controlled release fertilizer is applied to paddy rice, and per season can only be executed disposable fertilizer, compares with conventional fertilizer application, can improve the paddy rice number of productive ear and increases production, and amount of increase in production is 4～10%.
Estimate the stripping situation of fertilizer in soil with down routine method:
Select for use vermiculite power and peat equal-volume to be mixed as simulated soil, get fertilizer 1g and 20g simulated soil mixing, place the 100ml triangular flask, it is moistening to add water, 25 ℃ of constant temperature culture, and the regular hour is measured the semi-invariant of simulated soil inorganic nitrogen.
Various fertilizer are to the accumulation (25 ℃ are extracted) of inorganic nitrogen in soil
Remarks: the ratio of urea and OAT is a weight ratio
Found out that by table the release of blood urea nitrogen reached maximum in 5 days, the release of trimeric cyanamide by product (OAT) nitrogen is very slow, and urea and OAT composite after, the release of nitrogen is very mild, and the release of blood urea nitrogen is also slack-off; Urea is different with the OAT compound proportion, inorganic nitrogen concentration reaches the asynchronism(-nization) of maximum in the soil, and the ratio that the different OAT of the rate of release of nitrogen account for is big more, and the deenergized period of nitrogen is long more, therefore, can reach the purpose that the control nutrient discharges by the composition of adjusting OAT and instant nitrogenousfertilizer.
Claims (8)
1 one kinds of release and release control fertilizers is characterized in that this fertilizer contains following component (by weight percentage):
The solid by-product of trimeric cyanamide: 10～95%
Instant nitrogenousfertilizer 0～90%
Phosphate fertilizer 0～50%
Potash fertilizer 0～50%
Trace element fertilizer 0～1%
Soil conditioner 0～40%
The solid by-product of described trimeric cyanamide is to produce the solid by-product that trimeric cyanamide produces, and contains trimeric cyanamide, cyanuramide, cyanurodiamide, tricyanic acid, diatomite etc.
2 one kinds of release and release control fertilizers is characterized in that this fertilizer contains following component (by weight percentage):
The solid by-product of trimeric cyanamide: 20～60%
Instant nitrogenousfertilizer 10～50%
Phosphate fertilizer 10～30%
Potash fertilizer 10～30%
Trace element fertilizer 0～5%
Soil conditioner 0～5%
The solid by-product of described trimeric cyanamide is to produce the solid by-product that trimeric cyanamide produces, and contains trimeric cyanamide, cyanuramide, cyanurodiamide, tricyanic acid, diatomite etc.
3 controlled release fertilizer according to claim 1 is characterized in that described instant nitrogenousfertilizer is a kind of or mixture in urea, ammonium nitrate, the sulphur ammonium.
4 controlled release fertilizer according to claim 1 is characterized in that described phosphate fertilizer is a kind of or mixture in ammonium phosphate, calcium superphosphate, fused(calcium magnesium)phosphate, the white fertilizer.
5 controlled release fertilizer according to claim 1 is characterized in that described potash fertilizer is a kind of or mixture in Repone K, the vitriolate of tartar.
6 want 1 described controlled release fertilizer according to right, it is characterized in that described trace element fertilizer is a kind of or mixture in iron fertilizer, manganese fertilizer, copper fertilizer, zinc fertilizer, boron fertilizer, the molydbenum fertilizer.
7 controlled release fertilizer according to claim 1 is characterized in that described soil conditioner is a kind of or mixture in diatomite, wilkinite, the zeolite.
8 controlled release fertilizer according to claim 1 is characterized in that being made by mixing, granulating and forming, drying by trimeric cyanamide solid by-product, instant nitrogenousfertilizer, phosphate fertilizer, potash fertilizer, trace element fertilizer, soil conditioner etc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA021280134A CN1506337A (en) | 2002-12-12 | 2002-12-12 | Controlled release fertilizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA021280134A CN1506337A (en) | 2002-12-12 | 2002-12-12 | Controlled release fertilizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1506337A true CN1506337A (en) | 2004-06-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA021280134A Pending CN1506337A (en) | 2002-12-12 | 2002-12-12 | Controlled release fertilizer |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009098709A1 (en) * | 2008-02-08 | 2009-08-13 | Sree Ramcides Chemicals Pvt Ltd | A product to boost photosynthesis |
| CN102372518A (en) * | 2010-08-11 | 2012-03-14 | 山东省舜天化工集团有限公司 | Compound fertilizer and production method thereof |
| WO2014195962A1 (en) * | 2013-06-07 | 2014-12-11 | Subramanyam Sundaresan | A product for coating fertilizers |
-
2002
- 2002-12-12 CN CNA021280134A patent/CN1506337A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009098709A1 (en) * | 2008-02-08 | 2009-08-13 | Sree Ramcides Chemicals Pvt Ltd | A product to boost photosynthesis |
| US8486944B2 (en) | 2008-02-08 | 2013-07-16 | Sree Ramcides Chemicals Pvt Ltd. | Product to boost photosynthesis |
| EA019288B1 (en) * | 2008-02-08 | 2014-02-28 | Сри Рамсидес Кемикалз Пвт Лтд. | A composition to boost photosynthesis |
| CN102372518A (en) * | 2010-08-11 | 2012-03-14 | 山东省舜天化工集团有限公司 | Compound fertilizer and production method thereof |
| CN102372518B (en) * | 2010-08-11 | 2013-10-23 | 山东省舜天化工集团有限公司 | Compound fertilizer and production method thereof |
| WO2014195962A1 (en) * | 2013-06-07 | 2014-12-11 | Subramanyam Sundaresan | A product for coating fertilizers |
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