CN102875235A - Coated synergistic nitrogen fertilizer composition and preparation method thereof - Google Patents
Coated synergistic nitrogen fertilizer composition and preparation method thereof Download PDFInfo
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- CN102875235A CN102875235A CN2012103948914A CN201210394891A CN102875235A CN 102875235 A CN102875235 A CN 102875235A CN 2012103948914 A CN2012103948914 A CN 2012103948914A CN 201210394891 A CN201210394891 A CN 201210394891A CN 102875235 A CN102875235 A CN 102875235A
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Abstract
The invention relates to a coated synergistic nitrogen fertilizer composition and a preparation method thereof. The nitrogen fertilizer composition contains 0.01-30.0 percent of gamma-polyglutamic acid. The preparation method of the nitrogen fertilizer composition comprises the following steps of: adding water into the gamma-polyglutamic acid and mixing to obtain gamma-polyglutamic acid solution; adding an auxiliary agent into the gamma-polyglutamic acid solution to obtain gamma-polyglutamic acid coating solution; and uniformly spraying the gamma-polyglutamic acid solution to nitrogen fertilizer particles to uniformly mix, then drying and quantitatively packaging to obtain a finished product. According to the product, the release time of the fertilizer in soil is about 4 times longer than that of the conventional fertilizer, the using amount of the fertilizer can be directly reduced by over 20 percent, and the cost is saved on the basis of guaranteeing the yield of crops.
Description
Technical field
The present invention relates to fertilizer field, particularly a kind of can environmental contamination reduction, promote crop alimentary to absorb, improve the Envelope type synergistic N fertilizer composition and method of making the same of utilization rate of fertilizer.
Background technology
Nitrogen fertilizer production amount and the consumption of China all occupy first place in the world, but utilization rate of fertilizer low be a large bottleneck that restricts China's agricultural development.Data representation, China's amount of application of nitrogen fertilizer was 2,400 ten thousand tons in 2011, and because utilization rate of fertilizer is low, nitrogenous fertilizer is by the approach such as volatilization, leaching and runoff loss enormous amount, and approximately 1,000 ten thousand tons in Direct Loss fertilizer is amounted to approximately 34,000,000,000 yuan of Renminbi.Simultaneously, bring the consequences such as soil fertility descends, crops quality reduces, environmental pollution is serious thereupon.Therefore improve utilization rate of fertilizer, reduce fertilizer loss, be subject to domestic and international agriculturist and pay close attention to widely.
Gamma-polyglutamic acid-is the water-soluble polyamino acid that microbial fermentation produces, and is the high molecular polymer that is formed peptide bond by glutamic acid units by alpha-amino group and γ-carboxyl.Gamma-polyglutamic acid-is a kind of novel high polymer material by the synthetic water-soluble biological degradability of microorganism, is widely used in many fields such as agricultural, medicine, food, daily use chemicals, is a kind of generally acknowledged Green Chemistry product that has development potentiality.Poly-gamma-glutamic acid has biodegradability, super-strong moisture absorbing and water-retentivity, good biocompatibility, reduced immunogenicity, environmentally safe, to physical chemistry and the biological characteristics of a series of uniquenesses such as human body toxicological harmless, its degraded product is non-harmful L-glutamic acid.At present, research both at home and abroad mainly concentrates on improvement and the gene studies that produces bacterium, fermenting process research and the research of extraction purge process, with and the production of derivative and the research of character, its applied research is few, and mainly concentrates on the wetting Agent for Printing Inks of pharmaceutical carrier, makeup, the applied research of dietary fiber food aspect.Agriculturally study lessly, mainly study their disease resistance of plant, water-loss reducer of soil, the researches of other side.
Gamma-polyglutamic acid-is applied to the research report of agriculture production first appeared in the nineties in 20th century, mainly is the aspect that affects on Vigor of Crop, and along with the understanding of people to its unique Physiology and biochemistry character, it has been subject to paying close attention to widely at Application in agriculture.Because gamma-polyglutamic acid-has the characteristics such as biodegradability, chelating and absorption enhancer, nutrient is had the absorption chelating to gamma-polyglutamic acid-and function is held in suction, the temporary transient no nutrient of plant is stored, need and slowly release with growing of crop, thereby satisfy the nutrient demand of crop middle and later periods, avoid early ageing and taken off fertilizer, reduced topdress number of times and topdressing amount, thereby greatly reduced labour intensity.Studies show that guaranteeing that using usually of gamma-polyglutamic acid-can improve chemical fertilizer application efficient 10 ~ 30%, makes the crop yields 8 ~ 31% such as tobacco, vegetables in the normal situation of plant-growth, increasing production of rice is obvious.Use gamma-polyglutamic acid-not only can play the fertile synergy of joint, the effect of increasing yield and improving quality can also reduce surface water and body of groundwater pollution that fertilizer loss causes, regulates microenvironment and the Soil structure of soil, reduces the effects such as agriculture production cost.Therefore, gamma-polyglutamic acid-is applied in agriculture production and will be obtained preferably Social benefit and economic benefit.
Nitrogen fertilizers commonly used is greatly to being divided into ammonium attitude, nitre attitude and amide nitrogen fertilizer three types.Develop again long-acting nitrogen fertilizer (or Slowly release nitrogen fertilizer) new variety over nearly 20 years.All kinds of nitrogenous fertilizer principal items are as follows: (1) ammonium fertilizer: mainly contain ammonium sulfate, ammonium chloride, bicarbonate of ammonia, ammoniacal liquor and ammonia liquor; (2) nitrate fertilizer: mainly contain that nitric acid is received, nitrocalcite; (4) amide nitrogen fertilizer mainly contains urea, calcium cyanamide (lime nitrogen).
Different by principle and technique, long-acting nitrogen fertilizer (or Slowly release nitrogen fertilizer) but rough segmentation is two large classes: Envelope type and non-Envelope type.Envelope type nitrogenous fertilizer is a kind of of physical slow-release nitrogen fertilizer, be with the insoluble or material that is insoluble in water as coated fertilizer, the chemical fertilizer of water soluble nutrient is wrapped up, by molten nutrient by fenestra to external diffusion, reach nutrient and slowly discharge, be beneficial to crop and in time absorb.Non-coated fertilizer is by taking certain manufacturing means, or adds certain additive, or adds certain carrier, changes the character of water soluble fertilizer, thereby reaches control or delay the purpose that nutrient discharges in the fertilizer.
CN101492327A discloses a kind of nitrogenous fertilizer coating type sustained-release chemical fertilizer, be comprised of chemical fertilizer core and chemical fertilizer core peplos, coating is the composite film of resin-expanded graphite compound film layer or resin-expanded graphite compound film layer and degradable polymer rete.Described degradable polymer is aminoresin preferably.Aminoresin is urea-formaldehyde resin and/or melamine resin.Can also be compounded with sulfur film layer and/or high permeability resistant organic film layer in the coating.Can also be mixed with high permeability resistant organic in the resin-expanded graphite compound film layer.The massfraction of expanded graphite is preferably 2% ~ 15% scope in the resin-expanded graphite compound film layer.The coating total thickness should 〉=40 μ m, and high permeability resistant organic film layer thickness is best≤20 μ m, and sulfur film layer thickness is best≤20 μ m.The release controlled fertilizer that this invention provides is at aspect Shortcomings such as utilization rate of fertilizer.
Summary of the invention
The object of the present invention is to provide that a kind of utilization rate of fertilizer is high, protection of the environment, soil protection structure, save the Envelope type synergistic N fertilizer composition and method of making the same of cost in a large number.
The present invention adds the gamma-polyglutamic acid-that is obtained by microbial fermentation in common nitrogenous fertilizer.Difference according to the gamma-polyglutamic acid-addition manner mainly is divided into two types: non-Envelope type synergistic N fertilizer and Envelope type synergistic N fertilizer, kind according to nitrogenous fertilizer is different, and non-Envelope type synergistic N fertilizer can be divided into three types again: synergy ammonium fertilizer, synergy nitrate fertilizer and synergy amide nitrogen fertilizer.The present invention relates generally to Envelope type synergistic N fertilizer composition and method of making the same.Optionally add resistance solvent, nitrification inhibitor, urease inhibitor, sorbent material, amendment, tensio-active agent etc. in the synergistic N fertilizer of the present invention.
Products Eco environmental protection of the present invention, preserve moisture and fertility can reduce the waste of nitrogenous fertilizer, the activation nutrient element improves N fertilizer utilization rate, makes nutrient slowly-released, reduce the amount of application of fertilizer, avoid using nitrogenous fertilizer in a large number and the problem of environmental pollution that brings, saved agriculture production cost.
For reaching this purpose, the present invention by the following technical solutions:
A kind of Envelope type synergistic N fertilizer composition contains the quality percentage composition and is 0.01 ~ 30.0% gamma-polyglutamic acid-in the described nitrogenous fertilizer.
The preparation method of gamma-polyglutamic acid-can be obtained from prior art by those skilled in the art.
Gamma-polyglutamic acid-contains terminal amine and a plurality of-COOH group, the NH of nitrogenous fertilizer
4 +, the K in the potash fertilizer
+, the Ca of secondary nutrients
2+, Mg
2+, trace element fertilizer Zn
2+Deng can be directly and the carboxyl site of gamma-polyglutamic acid-and amide group site bonding, form water miscible, stable gamma-polyglutamic acid-salt, provide nutrition for plant growth lentamente.
Gamma-polyglutamic acid-can have multiple conformation: alpha-helix, and random coil, beta sheet, helix-coil transition district, parcel are coalescent etc.The pH of fertilizer is mostly 5 ~ 8, and the main existence form of gamma-polyglutamic acid-is the binding form.When closing with some metal ion huge legendary turtle, it is coalescent that conformation changes parcel into from random coil, can delay fertilizer releasing nutrients element.
The content of gamma-polyglutamic acid-is 0.01 ~ 30.0% in the synergistic N fertilizer of the present invention, for example can select 0.012 ~ 29.5%, 0.1 ~ 25.0%, 0.85 ~ 22.3%, 1.05 ~ 16.0%, 1.52 ~ 11.0% etc., optimal effectiveness is 1.00 ~ 1.50%, the centering trace element has splendid chelating adsorptive power, and has many electronegativies, can effectively stop SO in the chemical fertilizer
4 2-, CO
3 2-, PO
4 3-Deng with the combination of the trace element such as Ca, Mg, avoid producing low-solubility salt and precipitating action, make crop more can effectively absorb Trace Elements in Soil, promote crop root growth, strengthen disease resistance.In addition, for Pb
2+, Cu
2+, Cd
2+, Cr
3+, Al
3+, As
4+In heavy metal, gamma-polyglutamic acid-has splendid chelating effect, can be used as heavy metals absorbent, avoids toxic heavy metal in the too much soil of Crop.
The molecular weight of described gamma-polyglutamic acid-is 10 ~ 2,000,000 dalton, for example can select 12 ~ 1,850,000 dalton, 30 ~ 1,450,000 dalton, 62 ~ 1,000,000 dalton, 800,000 dalton etc., preferred 15 ~ 1,000,000 dalton, further preferred 500,000 dalton.
The quality percentage composition of described gamma-polyglutamic acid-in described nitrogenous fertilizer is 0.50 ~ 1.50%, further preferred 1.20%.
Nitrogenous fertilizer of the present invention also comprises auxiliary agent; Described auxiliary agent comprises the mixture of a kind of in resistance solvent, nitrification inhibitor, urease inhibitor, sorbent material, amendment or the tensio-active agent or at least two kinds.The selection of described resistance solvent, nitrification inhibitor, urease inhibitor, sorbent material, amendment or tensio-active agent can be selected according to common practise and actual needs by those skilled in the art, can realize that its function gets final product, the present invention there is no particular restriction, below is chosen as preferred.
The quality percentage composition of resistance solvent of the present invention in nitrogenous fertilizer is 0.3 ~ 1.5%, for example can select 0.31 ~ 1.48%, 0.45 ~ 1.3%, 0.8 ~ 1.1%, 0.9% etc.
Further, described resistance solvent is selected from the mixture of a kind of in zinc sulfate, copper sulfate or the calcium carbonate or at least two kinds, zinc sulfate for example, the mixture of calcium carbonate and copper sulfate, the mixtures of zinc sulfate, copper sulfate and calcium carbonate etc., those skilled in the art can select according to actual needs.
Further, described resistance solvent is for accounting for the zinc sulfate of described nitrogenous fertilizer quality percentage composition 0.5 ~ 1%.
The quality percentage composition of nitrification inhibitor of the present invention in nitrogenous fertilizer is 0.1 ~ 0.6%, for example can select 0.11 ~ 0.58%, 0.18 ~ 0.46%, 0.23 ~ 0.4%, 0.35% etc.
Further, described nitrification inhibitor is selected from the mixture of a kind of in thiocarbamide, Dyhard RU 100 or the cyanalcohol or at least two kinds, for example can select Dyhard RU 100, cyanalcohol, the mixture of thiocarbamide and Dyhard RU 100, the mixtures of thiocarbamide, Dyhard RU 100 and cyanalcohol etc., those skilled in the art can select according to actual needs.
Further, described nitrification inhibitor is for accounting for the thiocarbamide of described nitrogenous fertilizer quality percentage composition 0.3 ~ 0.5%.
The quality percentage composition of urease inhibitor of the present invention in nitrogenous fertilizer is 0.1 ~ 0.6%, for example can select 0.12 ~ 0.58%, 0.23 ~ 0.5%, 0.4 ~ 0.45 etc.Urease inhibitor is that soil urease liveness is had an inhibiting class material, can delay in a short time the hydrolysis of urea, reduces nitrogen loss.
Further, described urease inhibitor is the mixture of a kind of in ferrous sulfate, boric acid, acephate or the methylamine or at least two kinds, boric acid for example, acephate, the mixture of ferrous sulfate and methylamine, the mixture of ferrous sulfate, boric acid and acephate etc.
Further, described urease inhibitor is for accounting for the ferrous sulfate of described nitrogenous fertilizer quality percentage composition 0.3 ~ 0.5%.
In use, being used in combination of nitrification inhibitor and urease inhibitor can effectively be reduced hydrolysis of urea product NH
4 +Nitrated rate so that NO
3 -Amount to lower floor's soil eluviation obviously reduces, and the chance of drenching topsoil soils reduces.
The quality percentage composition of sorbent material of the present invention in nitrogenous fertilizer is 0.5 ~ 1.5%, for example can select 0.52 ~ 1.46%, 0.7 ~ 1.3%, 0.82 ~ 1.1%, 1% etc.
Further, described sorbent material is calcium chloride and/or magnesium chloride, for example can select calcium chloride, magnesium chloride, the mixture of calcium chloride and magnesium chloride etc.
Further, described sorbent material is for accounting for the calcium chloride of described nitrogenous fertilizer quality percentage composition 0.8 ~ 1%.
The quality percentage composition of amendment of the present invention in nitrogenous fertilizer is 0.5 ~ 5%, for example 0.52 ~ 4.89%, 0.8 ~ 4.3%, 1.3 ~ 3.7%, 1.85 ~ 3.2%, 2.5% etc.
Further, described amendment is the mixture of a kind of in kaolin powder, talcum powder or the china clay or at least two kinds, for example can select kaolin powder, china clay, the mixture of kaolin powder and china clay, the mixture of kaolin powder, talcum powder and china clay etc.
Further, described amendment is for accounting for the kaolin powder of nitrogenous fertilizer quality percentage composition 1.5 ~ 2%.
The quality percentage composition of tensio-active agent of the present invention in nitrogenous fertilizer is 0.3 ~ 2%, for example 0.31 ~ 1.96%, 0.6 ~ 1.4%, 0.83 ~ 1.1%, 0.95% etc.
Further, described tensio-active agent is Sodium dodecylbenzene sulfonate.
Further, described tensio-active agent is for accounting for the Sodium dodecylbenzene sulfonate of nitrogenous fertilizer quality percentage composition 0.6 ~ 0.8%.
Nitrogen fertilizer composition of the present invention also contains the mixture of a kind of in zinc, copper, calcium, iron, boron or the magnesium elements or at least two kinds.Its content can be selected according to practical situation and common practise by those skilled in the art.
The quality percentage composition of each composition of the present invention is the quality percentage composition that accounts for nitrogen fertilizer composition.
The present invention also provides a kind of preparation method of as mentioned above Envelope type synergistic N fertilizer composition, may further comprise the steps:
1) gamma-polyglutamic acid-is added water and be mixed to get gamma-polyglutamic acid-solution;
2) in the gamma-polyglutamic acid-solution that step 1) obtains, add auxiliary agent, obtain the gamma-polyglutamic acid-coating liquid;
3) form of gamma-polyglutamic acid-coating liquid with spraying evenly is sprayed onto in the nitrogenous fertilizer particle and mixes, then carry out drying, quantitative package gets finished product.
Above method steps 3) consumption of described nitrogenous fertilizer particle can be calculated according to practical situation and experience by those skilled in the art, in operation, take the nitrogen fertilizer composition of producing certain mass as purpose, take by weighing in proportion gamma-polyglutamic acid-, resistance solvent, urease inhibitor or nitrification inhibitor, sorbent material, amendment is behind the tensio-active agent, can calculate according to routine loss etc. the consumption of nitrogenous fertilizer particle, thisly be calculated as method well known to those skilled in the art.
Described step 1) maintains the temperature at 75 ~ 90 ℃ in mixing process, for example can select 75.2 ~ 89 ℃, and 78 ~ 83 ℃, 81.5 ℃ etc., further preferred 80 ℃.
Hybrid mode of the present invention is for being that the oscillator of 50Hz shakes at least 1h in frequency, 1h for example, and 1.3h, 2h, 5h etc. all can be used for implementing the present invention.
Further, the concussion time is 1 ~ 1.5h.The concussion time is less than 1h, might make the dispersion of gamma-polyglutamic acid-in water inhomogeneous, is unfavorable for the carrying out of subsequent step; 1.5h during the left and right sides, gamma-polyglutamic acid-is very even with mixing of water, there is no need to continue concussion.
The preparation method of a kind of as mentioned above Envelope type synergistic N fertilizer composition provided by the invention may further comprise the steps:
1) gamma-polyglutamic acid-is added water and be mixed to get gamma-polyglutamic acid-solution: get the gamma-polyglutamic acid-crystal, be added to the water while stirring, maintaining the temperature at 75 ~ 90 ℃, is to cool off under the normal temperature after the oscillator of 50Hz shakes 1 ~ 1.5h in frequency, obtains the gamma-polyglutamic acid-aqueous solution;
2) in the gamma-polyglutamic acid-solution that step 1) obtains, add auxiliary agent, obtain the gamma-polyglutamic acid-coating liquid;
3) form of gamma-polyglutamic acid-coating liquid with spraying evenly is sprayed onto in the nitrogenous fertilizer particle and mixes, then carry out drying, quantitative package gets finished product.
Nitrogenous fertilizer of the present invention comprises ammonium attitude, nitre attitude or amide nitrogen fertilizer.The nitrogenous fertilizer that those skilled in the art can be known all can be used for implementing the present invention.
Compare with the prior art scheme, the present invention has following beneficial effect:
Coating body environmental sound of the present invention, cost is lower, and release period is longer.
The nutrient releasing speed of nitrogenous fertilizer provided by the invention and quantity are accurately controlled, realize that more easily nutrient discharges with Crop synchronous, thereby have greatly improved the utilising efficiency of fertilizer.
The present invention compares with general synergistic N fertilizer, not only can improve utilization rate of fertilizer, prolongs the lifetime of fertilizer in soil, promotes crop to the absorption of nutritive substance, can also play protection of the environment, keeps soil from packing together the effects such as soil protection structure.Experiment shows, this product has prolonged about 4 times fertilizer the time of releasing in soil than conventional fertilizers, and the consumption that can directly reduce fertilizer has been saved cost on the basis that guarantees crop yield more than 20%.
The gamma-polyglutamic acid-that the present invention adopts is obtained by microbial fermentation technology by subtilis, it is a kind of novel green biomaterial of water-soluble biodegradable, have the characteristics such as edibility, nontoxicity, film-forming properties, cohesiveness, moisture retention, at the improvement Soil structure, improve the soil water-reataining fertilizer-keeping ability, environmental contamination reduction, the aspects such as raising utilization rate of fertilizer have good effect, have significant social benefit, economic benefit and environmental benefit.
Below the present invention is described in more detail.But following example only is simple and easy example of the present invention, does not represent or limit the scope of the present invention, and interest field of the present invention is as the criterion with claims.
Embodiment
For the present invention is described better, be convenient to understand technical scheme of the present invention, typical but non-limiting embodiment of the present invention is as follows:
The preparation method of Envelope type synergistic N fertilizer composition of the present invention may further comprise the steps:
1) preparation gamma-polyglutamic acid-: take subtilis as bacterial classification, obtain gamma-polyglutamic acid-by the Liquid batch fermentation method, obtain the gamma-polyglutamic acid-crystal through separating and purifying technology, its molecular weight is between 10 ~ 2,000,000 dalton;
2) gamma-polyglutamic acid-is added water and be mixed to get gamma-polyglutamic acid-solution; Getting the gamma-polyglutamic acid-crystal, be added to the water while stirring, maintain the temperature at 75 ~ 90 ℃, is to cool off under the normal temperature after the oscillator of 50Hz shakes 1 ~ 1.5h in frequency, obtains the gamma-polyglutamic acid-aqueous solution;
3) in step 2) add resistance solvent in the gamma-polyglutamic acid-solution that obtains, urease inhibitor or nitrification inhibitor, sorbent material, amendment, tensio-active agent obtain the gamma-polyglutamic acid-coating liquid;
4) form of gamma-polyglutamic acid-coating liquid with spraying evenly is sprayed onto in the nitrogenous fertilizer particle and mixes, then carry out drying, quantitative package gets finished product.
To produce 100kg nitrogenous fertilizer as example, the raw material of each embodiment composition and preparation condition are shown in table 1, table 2:
The raw material of each embodiment of table 1 forms
Annotate: "-" expression is without adding.
The preparation condition of each embodiment of table 2
| Fertilizers | Mixing temperature/℃ | Concussion time/h | |
| Embodiment 1 | Urea | 75 | 1.1 |
| Embodiment 2 | Ammonium nitrate | 80 | 1.5 |
| Embodiment 3 | Ammonium chloride | 82 | 1.3 |
| Embodiment 4 | Bicarbonate of ammonia | 84 | 1.2 |
| Embodiment 5 | SODIUMNITRATE | 88 | 2.1 |
| Embodiment 6 | Urea | 73 | 1 |
| Embodiment 7 | Ammonium sulfate | 79 | 2.5 |
| Embodiment 8 | Nitrocalcite | 90 | 2 |
Applicant's statement, the person of ordinary skill in the field is on the basis of above-described embodiment, concrete content point value with above-described embodiment component, combined with the technical scheme of summary of the invention part, thereby the new numerical range that produces, also be one of record scope of the present invention, the application is no longer enumerated these numerical ranges for making specification sheets simple and clear.
Applicant's statement, the present invention illustrates preparation method of the present invention by above-described embodiment, but the present invention is not limited to the aforesaid operations step, does not mean that namely the present invention must rely on the aforesaid operations step and could implement.The person of ordinary skill in the field should understand, any improvement in the present invention to the interpolation of the equivalence replacement of the selected raw material of the present invention and ancillary component, the selection of concrete mode etc., all drops within protection scope of the present invention and the open scope.
Claims (10)
1. an Envelope type synergistic N fertilizer composition is characterized in that, contains the quality percentage composition in the described nitrogen fertilizer composition and be 0.01 ~ 30.0% gamma-polyglutamic acid-.
2. composition as claimed in claim 1 is characterized in that, the molecular weight of described gamma-polyglutamic acid-is 10 ~ 2,000,000 dalton, preferred 15 ~ 1,000,000 dalton, further preferred 500,000 dalton;
Preferably, the quality percentage composition of described gamma-polyglutamic acid-in described nitrogenous fertilizer is 0.50 ~ 1.50%, further preferred 1.20%;
Preferably, described nitrogen fertilizer composition also comprises auxiliary agent; Described auxiliary agent comprises the mixture of a kind of in resistance solvent, nitrification inhibitor, urease inhibitor, sorbent material, amendment or the tensio-active agent or at least two kinds.
3. composition as claimed in claim 2 is characterized in that, the quality percentage composition of described resistance solvent in described nitrogenous fertilizer is 0.3 ~ 1.5%;
Preferably, described resistance solvent is selected from the mixture of a kind of in zinc sulfate, copper sulfate or the calcium carbonate or at least two kinds;
Preferably, described resistance solvent is for accounting for the zinc sulfate of described nitrogenous fertilizer quality percentage composition 0.5 ~ 1%.
4. composition as claimed in claim 2 or claim 3 is characterized in that, the quality percentage composition of described nitrification inhibitor in described nitrogenous fertilizer is 0.1 ~ 0.6%;
Preferably, described nitrification inhibitor is selected from the mixture of a kind of in thiocarbamide, Dyhard RU 100 or the cyanalcohol or at least two kinds;
Preferably, described nitrification inhibitor is for accounting for the thiocarbamide of described nitrogenous fertilizer quality percentage composition 0.3 ~ 0.5%.
5. such as the described composition of one of claim 2-4, it is characterized in that, the quality percentage composition of described urease inhibitor in described nitrogenous fertilizer is 0.1 ~ 0.6%;
Preferably, described urease inhibitor is the mixture of a kind of in ferrous sulfate, boric acid, acephate or the methylamine or at least two kinds;
Preferably, described urease inhibitor is for accounting for the ferrous sulfate of described nitrogenous fertilizer quality percentage composition 0.3 ~ 0.5%.
6. such as the described composition of one of claim 2-5, it is characterized in that, the quality percentage composition of described sorbent material in described nitrogenous fertilizer is 0.5 ~ 1.5%;
Preferably, described sorbent material is calcium chloride and/or magnesium chloride;
Preferably, described sorbent material is for accounting for the calcium chloride of described nitrogenous fertilizer quality percentage composition 0.8 ~ 1%.
7. such as the described composition of one of claim 2-6, it is characterized in that, the quality percentage composition of described amendment in described nitrogenous fertilizer is 0.5 ~ 5%;
Preferably, described amendment is the mixture of a kind of in kaolin powder, talcum powder or the china clay or at least two kinds;
Preferably, described amendment is for accounting for the kaolin powder of described nitrogenous fertilizer quality percentage composition 1.5 ~ 2%;
Preferably, the quality percentage composition of described tensio-active agent in described nitrogenous fertilizer is 0.3 ~ 2%;
Preferably, described tensio-active agent is Sodium dodecylbenzene sulfonate;
Preferably, described tensio-active agent is for accounting for the Sodium dodecylbenzene sulfonate of described nitrogenous fertilizer quality percentage composition 0.6 ~ 0.8%.
8. such as the described composition of one of claim 1-7, it is characterized in that, described nitrogen fertilizer composition also contains the mixture of a kind of in zinc, copper, calcium, iron, boron or the magnesium elements or at least two kinds.
9. preparation method such as Envelope type synergistic N fertilizer composition as described in one of claim 1-8 may further comprise the steps:
1) gamma-polyglutamic acid-is added water and be mixed to get gamma-polyglutamic acid-solution;
2) in the gamma-polyglutamic acid-solution that step 1) obtains, add auxiliary agent, obtain the gamma-polyglutamic acid-coating liquid;
3) form of gamma-polyglutamic acid-coating liquid with spraying evenly is sprayed onto in the nitrogenous fertilizer particle and mixes, then carry out drying, quantitative package gets finished product.
10. method as claimed in claim 8 is characterized in that, step 1) maintains the temperature at 75 ~ 90 ℃ in mixing process, further preferred 80 ℃;
Preferably, described hybrid mode is for being that the oscillator of 50Hz shakes at least 1h in frequency;
Preferably, the concussion time is 1 ~ 1.5h.
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| CN103274856A (en) * | 2013-06-17 | 2013-09-04 | 中国农业科学院农业资源与农业区划研究所 | Glutamic acid synergistic ammonium phosphate fertilizer and preparation method thereof |
| CN103333004A (en) * | 2013-06-27 | 2013-10-02 | 深圳市芭田生态工程股份有限公司 | Agricultural granular zinc sulfate fertilizer and preparation method thereof |
| CN104163728A (en) * | 2014-09-03 | 2014-11-26 | 南京轩凯生物科技有限公司 | Double-coated long-acting controlled-release fertilizer and preparation method thereof |
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| CN114276181A (en) * | 2020-09-17 | 2022-04-05 | 沈阳中科新型肥料有限公司 | Multifunctional fertilizer synergist consisting of polyglutamic acids with different molecular weights |
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| CN103274856A (en) * | 2013-06-17 | 2013-09-04 | 中国农业科学院农业资源与农业区划研究所 | Glutamic acid synergistic ammonium phosphate fertilizer and preparation method thereof |
| CN103333004A (en) * | 2013-06-27 | 2013-10-02 | 深圳市芭田生态工程股份有限公司 | Agricultural granular zinc sulfate fertilizer and preparation method thereof |
| CN103333004B (en) * | 2013-06-27 | 2015-01-14 | 深圳市芭田生态工程股份有限公司 | Agricultural granular zinc sulfate fertilizer and preparation method thereof |
| CN104163728A (en) * | 2014-09-03 | 2014-11-26 | 南京轩凯生物科技有限公司 | Double-coated long-acting controlled-release fertilizer and preparation method thereof |
| CN105585371A (en) * | 2014-10-21 | 2016-05-18 | 辽宁中科生物工程有限公司 | Fertilizer synergistic additive and preparation thereof |
| CN107986885A (en) * | 2017-12-29 | 2018-05-04 | 广东拉多美化肥有限公司 | A kind of coated compound fertilizer |
| CN108059537A (en) * | 2017-12-29 | 2018-05-22 | 广东拉多美化肥有限公司 | A kind of coated compound fertilizer |
| CN110563502A (en) * | 2018-06-06 | 2019-12-13 | 贵州天宝丰原生态农业科技有限公司 | Kiwi fruit wrapped slow-release special fertilizer and preparation method thereof |
| CN114276181A (en) * | 2020-09-17 | 2022-04-05 | 沈阳中科新型肥料有限公司 | Multifunctional fertilizer synergist consisting of polyglutamic acids with different molecular weights |
| CN114105708A (en) * | 2021-12-16 | 2022-03-01 | 宁夏顺宝现代农业股份有限公司 | Production process of multifunctional slow-release coated bio-organic fertilizer |
| CN114456010A (en) * | 2022-03-15 | 2022-05-10 | 五原县沃丰生物科技有限责任公司 | Preparation method and production equipment of coated urea slow-release fertilizer |
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