CN109734544A - Dedicated ureaformaldehyde slow release fertilizer of rice side deep fertilizing and preparation method thereof - Google Patents
Dedicated ureaformaldehyde slow release fertilizer of rice side deep fertilizing and preparation method thereof Download PDFInfo
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Abstract
The invention discloses dedicated ureaformaldehyde slow release fertilizer of rice side deep fertilizing and preparation method thereof and preparation systems.Wherein, which includes: the P of the N (0.8~4.8 parts by weight of slow-release nitrogen containing ureaformaldehyde) of 19~26 parts by weight, 10~15 parts by weight2O5, 12~16 parts by weight K2O, the Si of the Zn of 0.1~0.5 parts by weight and 0.5~1.0 parts by weight.The rice side deep fertilizing product uses ureaformaldehyde technology, and urea and formaldehyde occur methylene contracting bonding reaction, forms different chain length agroform, with good sustained release performance, and product particle intensity is high (>=30N), hygroscopicity is small, can satisfy the requirement of side deep fertilizing device；Humic acid is added, provides acid reaction condition for the synthesis of ureaformaldehyde, can play the role of improveing soil in application, improve rice yield.The middle microelement that the present invention adds, in the form of chelating based on, can be further improved the absorption of rice centering microelement, improve plant recovery of nutrient.With preferable effect of increasing production, there is good social and economic benefit.
Description
Technical field
The invention belongs to fertilizer fields, specifically, the present invention relates to the dedicated ureaformaldehyde slow release fertilizers of rice side deep fertilizing
And preparation method thereof.
Background technique
Rice is to produce most commonly used crops and China's the first grande culture object, China's paddy in 2016 in the world
About 30,000,000 hectares of cultivated area, China has more than 65% population using rice as staple food, and rice is ensureing national food security
In play decisive role.
Along with the variation of rural laborer's structure, traditional Rice Cropping and fertilization mode simplify to mechanization, gently
Direction is developed.Rice planting technology synchronizes side deep fertilizing technology, workload can be not only reduced, but also utilization rate of fertilizer can be improved, in China
Area is promoted and applied to expand year by year.Rice side deep fertilizing technology is 3~5cm near rice shoot root while accurate rice transplanting
Place imposes the partial fertilizer technology of fertilizer, and dose improves utilization rate of fertilizer than traditional cultivation mode section fertilizer 30%, reduces nutrient
Fixation and loss, can be effectively reduced cost of labor, mitigate planting area agricultural non-point source pollution.
Fertilizer plays an important role in the planting process of rice, in order to further increase the plantation efficiency of rice, specially
Sharp CN106397059A discloses a kind of high usage rice fertilizer and preparation method thereof, by all kinds of organic matters and middle microelement,
Microbial inoculum etc. is mixed, to improve soil quality improving plant recovery of nutrient simultaneously and improve rice resistance.Patent
CN105152780A discloses a kind of high-yield rice fertilizer, passes through addition betel nut and phoenix-tail fern mixed extract, it is possible to provide nutrition at
Divide and reduce rice pest incidence, significantly improves the quality of rice.Patent CN104086338A discloses a kind of rice control
Fertilizer and its preparation method and application is released, using urea as fertile core, using Concave-convex clay rod as internal layer, paraffin is that outer layer is wrapped
It wraps up in, rice controlled release fertilizer is made, dose and number can be reduced, improve rice yield.Patent CN101033163 discloses a kind of sulphur
Coated urea method of producing rice fertilizer, by spraying coating of the molten sulphur realization to urea, the product energy of acquisition to granular urea
Enough rapid submergeds, efficiently solve rice fertilizer flotation issue.
The paddy rice-dedicated fertilizer of above method production is delaying the Nitrogen releasing phase, and improving plant recovery of nutrient etc. has
Preferable effect, but there is problems: it is not able to satisfy the requirement of Rice lateral deep fertilizing device, intensity is lower, process of applying fertilizer
In easily cause blocking；Rice controlled release fertilizer and sulfur-coated urea are only capable of providing nitrogen nutrient, other nutrient supplies are insufficient.Therefore, existing
Rice fertilizer product still have much room for improvement.
Summary of the invention
The present invention is directed to solve at least some of the technical problems in related technologies.For this purpose, of the invention
One purpose is to propose a kind of dedicated ureaformaldehyde slow release fertilizer of rice side deep fertilizing and its production method.The ureaformaldehyde slow-release fertilizer
There is material characteristics, the products such as intensity is high, hygroscopicity is small, sustained release is efficient can satisfy rice side deep fertilizing device requirement, be suitable for
Rice side deep fertilizing, and can realize that rice base tiller with applying, reduces fertilizer application frequency, save fertile saving of labor, compared with common fertilizer, fat-reducing, increasing
Effect is significant, has good social and economic benefit.
In one aspect of the invention, the invention proposes a kind of dedicated ureaformaldehyde slow release fertilizer of rice side deep fertilizing,
It is characterized in that, comprising: the P of the N of 19~26 parts by weight, 10~15 parts by weight2O5, 12~16 parts by weight K2O, 0.1~0.5 weight
Measure the Zn of part and the Si of 0.5~1.0 parts by weight；Wherein, the N includes the ureaformaldehyde slow-release nitrogen of 0.8~4.8 parts by weight.
The dedicated ureaformaldehyde slow release fertilizer of rice side deep fertilizing according to an embodiment of the present invention, granule strength height, hygroscopicity
It is small, the requirement of Rice lateral deep fertilizer spraying machine device can be met, be suitable for rice side deep fertilizing；N includes available nitrogen and ureaformaldehyde in fertilizer
Slow-release nitrogen, wherein ureaformaldehyde slow-release nitrogen is made of the macromolecular substances of different chain length, be gradually decomposed to form through edaphon in, it is short
Chain substance, until being decomposed into the nitrogen that plant absorption utilizes, it can be achieved that rice base fetilizer for tillering reduces fertilizer application frequency, time and labour saving with applying.
Paddy rice anti contravariance and lodging resistance can be improved in Si, and rice is sensitive to Zn, and addition Zn is conducive to the formation of rice tillering.
In some embodiments of the invention, the ureaformaldehyde slow release fertilizer further comprises: 0.1~3.0 parts by weight
Humic acid.It both can be the methylenation condensation reaction of ureaformaldehyde addition liquid in fertilizer by using the humic acid suitably matched
Acid reaction condition is provided, can also play the role of improveing soil in application, improve rice yield.
In some embodiments of the invention, the N comes from urea, ammonium chloride, ammonium sulfate, monoammonium phosphate and Diammonium phosphate (DAP)
At least one of.
In some embodiments of the invention, the P2O5From monoammonium phosphate, Diammonium phosphate (DAP), general calcium, coarse whiting and di(2-ethylhexyl)phosphate
At least one of hydrogen potassium.
In some embodiments of the invention, the K2O is in potassium sulfate, potassium chloride, potassium dihydrogen phosphate and potassium nitrate
At least one of.
In some embodiments of the invention, the humic acid is in humic acid original powder, humic acid potassium, ammonium humate
At least one.The methylenation condensation reaction of ureaformaldehyde addition liquid and fertilizer can be further conducive in fertilizer as a result, to soil
The improvement of earth.
In some embodiments of the invention, the Zn comes from EDTA chelated zinc, zinc-amino acid chelate, poly-aspartate chela
Close at least one of zinc and ammonium polyphosphate chelated zinc.It can further be conducive to absorption of the crop to Zn-ef ficiency as a result, while into
One step is conducive to the formation of rice tillering.
In some embodiments of the invention, the Si from sodium metasilicate, sodium metasilicate, potassium silicate and is crossed in sodium disilicate
At least one of.
In another aspect of this invention, the invention proposes a kind of dedicated ureas of rice side deep fertilizing for preparing above-described embodiment
The method of formaldehyde slow release fertilizer.According to an embodiment of the invention, this method comprises: ((1) by nitrogen source, phosphorus source, potassium resource, zinc source and
Silicon source is mixed, and mixing is obtained；(2) formalin is mixed to urea and carried out carboxylated addition reaction, obtains ureaformaldehyde
Addition liquid；(3) the ureaformaldehyde addition liquid of step (2) and the mixing of step (1) are subjected to mixing granulation, wherein the ureaformaldehyde
Addition liquid completes methylenation condensation reaction under acidic environment, obtains the dedicated ureaformaldehyde slow-release fertilizer of the rice side deep fertilizing
Material.
The preparation method of ureaformaldehyde slow release fertilizer according to an embodiment of the present invention, by nitrogen source, phosphorus source, potassium resource, humic acid source,
Zinc source and silicon source are mixed to get mixing, and formaldehyde is mixed with urea and carries out carboxylated addition reaction, obtains ureaformaldehyde addition liquid, into
And mix ureaformaldehyde addition liquid with mixing, under the acidic environment that acid material provides, ureaformaldehyde addition liquid is completed sub-
Methylate condensation reaction, and obtains ureaformaldehyde slow release fertilizer described in preceding embodiment through being granulated.This method step is simple, condition
It is easily controllable, it is suitable for large-scale continuous production.
In some embodiments of the invention, in step (1), by nitrogen source, phosphorus source, potassium resource, humic acid source, zinc source and silicon source
It is mixed, obtains the mixing.
It in some embodiments of the invention, is the methylenation condensation reaction by the humic acid source in step (3)
Acidic environment is provided.
In some embodiments of the invention, the pH value of the acidic environment is 5.5~6.5.
In some embodiments of the invention, the content of formaldehyde is not less than 35v% in the formalin.
In some embodiments of the invention, alkaline solution is added in step (2), in Xiang Suoshu formalin to adjust
The pH value of formalin is stated to 9~10.
In some embodiments of the invention, the alkaline solution in NaOH solution, KOH solution and ammonium hydroxide at least
One of.
In some embodiments of the invention, the weight ratio of the humic acid source and the ureaformaldehyde addition liquid be (1~
2): (2~4).Ureaformaldehyde addition liquid can be further conducive to as a result, sufficiently to react with the first mixing.
In some embodiments of the invention, the weight ratio of the mixing and the ureaformaldehyde addition liquid be 1000:(20~
120).The agroform for generating different molecular weight as a result, can further be conducive to have certain sustained release performance
Promote the growth of rice.
In some embodiments of the invention, the molar ratio of the formaldehyde in the formalin and the urea be (1~
2):1.It can further improve the yield of ureaformaldehyde as a result,.
In some embodiments of the invention, the time that the mixing granulation processing carries out is 15~30min.As a result, may be used
Further be conducive to the acid material such as ureaformaldehyde addition liquid and humic acid to be sufficiently mixed, complete methylenation condensation reaction, thus
Obtain the ureaformaldehyde slow-release nitrogen of Optimum Contents.
Additional aspect and advantage of the invention will be set forth in part in the description, and will partially become from the following description
Obviously, or practice through the invention is recognized.
Detailed description of the invention
Above-mentioned and/or additional aspect of the invention and advantage will become from the description of the embodiment in conjunction with the following figures
Obviously and it is readily appreciated that, in which:
Fig. 1 is the preparation method flow diagram of slow release fertilizer according to an embodiment of the invention；
Fig. 2 is the process flow diagram for preparing slow release fertilizer according to an embodiment of the present invention.
Specific embodiment
The embodiments described below is exemplary, and for explaining only the invention, and should not be understood as to limit of the invention
System.Particular technique or condition are not specified in embodiment, described technology or conditions or presses according to the literature in the art
It is carried out according to product description.Reagents or instruments used without specified manufacturer is that can be produced by the routine of commercially available acquisition
Product.Examples of the embodiments are shown in the accompanying drawings, and in which the same or similar labels are throughly indicated same or similar
Element or element with the same or similar functions.The embodiments described below with reference to the accompanying drawings are exemplary, it is intended to use
It is of the invention in explaining, and be not considered as limiting the invention.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include at least one this feature.
In one aspect of the invention, the invention proposes a kind of dedicated ureaformaldehyde slow release fertilizer of rice side deep fertilizing,
It is characterized in that, comprising: the P of the N (0.8~4.8 parts by weight of slow-release nitrogen containing ureaformaldehyde) of 19~26 parts by weight, 10~15 parts by weight2O5、
The K of 12~16 parts by weight2O, the Si of the Zn of 0.1~0.5 parts by weight and 0.5~1.0 parts by weight.
Ureaformaldehyde slow release fertilizer according to an embodiment of the present invention, potassium matches the growth need that can meet rice in phosphorus in high nitrogen
It asks；Its granule strength is high, hygroscopicity is small, can meet the requirement of Rice lateral deep fertilizer spraying machine device, is suitable for rice side deep fertilizing；Fertilizer
N includes available nitrogen and ureaformaldehyde slow-release nitrogen in material, and wherein ureaformaldehyde slow-release nitrogen can realize that rice base fetilizer for tillering with applying, reduces fertilizer application frequency,
Time and labour saving.Paddy rice anti contravariance and lodging resistance can be improved in Si, and rice is sensitive to Zn, and addition Zn is conducive to the formation of rice tillering.
In addition, ureaformaldehyde slow release fertilizer of the invention also has intensity, high (according to some embodiments of the present invention, product particle intensity is not
Lower than 30N), hygroscopicity is small, sustained release characteristics, the character such as validity height can satisfy the requirement of rice side deep fertilizing device, and can
To reduce fertilizer application frequency, time and labour saving compares weight-reducing synergy significant effect with common fertilizer, has good society and economic effect
Benefit.
According to an embodiment of the invention, including 19~26 weight in the above-mentioned dedicated ureaformaldehyde slow release fertilizer of rice side deep fertilizing
The N (including available nitrogen and ureaformaldehyde slow-release nitrogen, wherein ureaformaldehyde slow-release nitrogen solidifies from urea and formaldehyde condensation) of part, 10~15 weight
The P of part2O5, 12~16 parts by weight K2O.For the growth demand of rice, ureaformaldehyde slow release fertilizer of the invention uses institute as above
Potassium formula in phosphorus in the high nitrogen stated.In addition, the polymerization of the poly- methene urea of ureaformaldehyde slow release fertilizer is spent if N content is too low
Low, slow release is low, causes fertilizer Nitrogen releasing too fast, so that the utilization rate of nitrogen reduces；If N content is excessively high, ureaformaldehyde is slow
The degree of polymerization of the poly- methene urea of release fertilizer is excessively high, and fertilizer Nitrogen releasing is excessively slow, and fertilizer efficiency period is too long, will also result in rice nutrient early period
It is insufficient.If P2O5Content is too low, then can cause Low phosphorus stress to plant growth；If P2O5Too high levels, it will cause soil
Middle phosphorus content is superfluous, influences absorption of the plant to microelements such as zinc, iron.If K2O content is too low, then is not able to satisfy plant pair
The absorption of potassium element can lead to plant slight of stature, the final inhibition plant strain growth of leaf area decline and yield composition；If K2O content
Excessively high, then cost of material increases, and results in waste of resources, Soil Environmental Pollution.
According to an embodiment of the invention, can further include 0.1~3.0 parts by weight in above-mentioned ureaformaldehyde slow release fertilizer
Humic acid.It, both can be anti-for the methylenation condensation of ureaformaldehyde addition liquid in fertilizer by using the humic acid of said ratio
Acid reaction condition should be provided, be conducive to ureaformaldehyde solution condensation and solidify, improvement soil can also be played in application, is promoted
Paddy growth, the effect for improving rice yield.
According to an embodiment of the invention, N, P in ureaformaldehyde slow release fertilizer2O5、K2O, humic acid, Zn and Si can be respectively by nitrogen
Source, phosphorus source, potassium resource, humic acid source, zinc source and silicon source provide.It is specific:
According to an embodiment of the invention, above-mentioned nitrogen source may include selected from urea, ammonium chloride, ammonium sulfate, monoammonium phosphate and
At least one of Diammonium phosphate (DAP).Preferably, nitrogen source is the combination of one or more of urea, ammonium chloride and ammonium sulfate.
According to an embodiment of the invention, above-mentioned phosphorus source may include selected from monoammonium phosphate, Diammonium phosphate (DAP), general calcium, coarse whiting and
At least one of potassium dihydrogen phosphate.Preferably, phosphorus source is monoammonium phosphate.
According to an embodiment of the invention, above-mentioned potassium resource may include selected from potassium sulfate, potassium chloride, potassium dihydrogen phosphate and nitric acid
At least one of potassium.Preferably, potassium resource is potassium chloride or potassium sulfate.
According to an embodiment of the invention, above-mentioned humic acid source may include selected from humic acid original powder, humic acid potassium, humic acid
At least one of ammonium.The methylenation condensation reaction of ureaformaldehyde addition liquid and fertilizer in fertilizer can be further conducive to as a result,
Expect the improvement to soil.Preferably, humic acid source is humic acid original powder.
According to an embodiment of the invention, above-mentioned zinc source may include selected from EDTA chelated zinc, zinc-amino acid chelate, poly- asparagus fern
At least one of propylhomoserin chelated zinc and ammonium polyphosphate chelated zinc.As a result, zinc source in the form of chelating based on, can further increase
Absorption of the crop to Zn-ef ficiency improves plant recovery of nutrient.Preferably, zinc source is ammonium polyphosphate chelated zinc.Can further have as a result,
Absorption conducive to crop to Zn-ef ficiency, while being further conducive to the formation of rice tillering.
According to an embodiment of the invention, above-mentioned silicon source may include selected from sodium metasilicate, sodium metasilicate, potassium silicate and crossing two silicon
At least one of sour sodium.Preferably, silicon source is sodium metasilicate.
In another aspect of this invention, the invention proposes a kind of dedicated ureas of rice side deep fertilizing for preparing above-described embodiment
The method of formaldehyde slow release fertilizer.According to an embodiment of the invention, this method comprises: (1) is by nitrogen source, phosphorus source, potassium resource, zinc source and silicon
The raw materials such as source are mixed after metering, are transported in roller pelletizer after crushed, and mixing is obtained；(2) by formalin with
Urea mixes and carries out carboxylated addition reaction, obtains ureaformaldehyde addition liquid；(3) after metering by ureaformaldehyde addition liquid, it is transported to
In pelletizer, occur methylenation condensation reaction under the acidic environment that the raw materials such as humic acid provide, and with it is mixed in pelletizer
Material carries out mixing granulation, obtains ureaformaldehyde slow release fertilizer.
The preparation method of ureaformaldehyde slow release fertilizer according to an embodiment of the present invention, by nitrogen source, phosphorus source, potassium resource, zinc source and silicon
Source is mixed to get mixing, and formaldehyde is mixed with urea and carries out carboxylated addition reaction, obtains ureaformaldehyde addition liquid, and then by urea first
Aldehyde addition liquid is mixed with mixing, and under the acidic environment that acid material provides, ureaformaldehyde addition liquid completes methylenation contracting
Reaction is closed, and obtains ureaformaldehyde slow release fertilizer described in preceding embodiment through being granulated.This method step is simple, condition is easy to control
System is suitable for large-scale continuous production.
Further the preparation method of ureaformaldehyde slow release fertilizer according to an embodiment of the present invention is carried out below with reference to Fig. 1 detailed
Description.According to an embodiment of the invention, this method comprises:
S100: mixing is prepared
In the step, nitrogen source, phosphorus source, potassium resource, zinc source and silicon source are mixed, mixing is obtained, which has certain
Acidity.A specific example according to the present invention, nitrogen source, phosphorus source, potassium resource, zinc source and silicon source from feed bin can pass through metering
It supplies after belt metering and is mixed into blender, and obtained mixing is further passed through into feed belt and is supplied to subsequent work
Sequence.In addition, it is necessary to which explanation, the type and proportion for being used to prepare the nitrogen source of mixing, phosphorus source, potassium resource, zinc source and silicon source are
As previously described, details are not described herein.
According to some embodiments of the present invention, in the step, can by nitrogen source, phosphorus source, potassium resource, humic acid source, zinc source and
Silicon source is mixed, and mixing is obtained.It both can be the methylene of ureaformaldehyde addition liquid in fertilizer by using humic acid in mixing
Base condensation reaction provides acid reaction condition, is conducive to ureaformaldehyde solution condensation and solidifies, can also play and change in application
Good soil, the effect for promoting paddy growth, improving rice yield.
According to some embodiments of the present invention, obtained mixing can be supplied to crusher and is crushed, and will crushed
The powder further progress subsequent processing arrived.The size of crushing rear material is not particularly restricted, as long as can be by subsequent
Mixing granulation handles to obtain the suitable ureaformaldehyde slow release fertilizer product of granularity, intensity.
S200: ureaformaldehyde addition liquid is prepared
In the step, formaldehyde is mixed to urea and carried out carboxylated addition reaction, obtains ureaformaldehyde addition liquid.Specifically
, formaldehyde and urea can obtain ureaformaldehyde addition liquid by carboxy methylation addition reaction, so as to the subsequent acidity provided in mixing
Methylenation condensation reaction is completed under environment.Here, it should be noted that after ureaformaldehyde addition liquid is mixed with mixing, in raw material
Under the acidic environment of equal offers, long-chain macromolecule polymer can be formed, nitrogen is sustained, to realize ureaformaldehyde sustained release of the present invention
Nitrogen sustained release in fertilizer；And methylene urea therein has suction-operated, fertilizer can be promoted to form glue in conjunction with soil particle
Shape chelate can be fully absorbed to reduce nutrient loss by crop, realize the raising of utilization rate of fertilizer.
According to an embodiment of the invention, the humic acid source in above-mentioned mixing can contract for the methylenation of ureaformaldehyde addition liquid
It closes reaction and acidic environment is provided.It in other words, can be complete by mixing and being granulated above-mentioned mixing with ureaformaldehyde addition liquid
At the methylenation condensation reaction of ureaformaldehyde addition liquid, obtains the dedicated ureaformaldehyde slow release fertilizer of rice side deep fertilizing of the invention and produce
Product.
According to some embodiments of the present invention, the pH value of above-mentioned acidic environment is 5.5~6.5, thus, it is possible to further have
Conducive to the progress of ureaformaldehyde addition liquid methylenation condensation reaction.
According to an embodiment of the invention, the content of formaldehyde is not less than 35v% in formalin.Some realities according to the present invention
Apply example, in S200, the pH value that alkaline solution can be added into formalin to adjust the formalin as a result, may be used to 9~10
The progress for being further conducive to formaldehyde Yu the addition of urea carboxylated, improves the yield of ureaformaldehyde, it is preferred that formalin pH value
Adjusting is completed before mixing formalin with urea.Specific example according to the present invention, above-mentioned alkaline solution can be selected from
At least one of NaOH solution, KOH solution and ammonium hydroxide.
According to an embodiment of the invention, the molar ratio of formaldehyde and urea in above-mentioned formalin can be (1~2): 1.
It can further be conducive to improve the yield of ureaformaldehyde as a result,.If the proportion of formaldehyde is too low, the low poly- first of the degree of polymerization in fertilizer
It is higher to pitch urea ratio, causes fertilizer Nitrogen releasing very fast, so that the utilization rate of nitrogen reduces；If the proportion of formaldehyde is excessively high, fertilizer
The degree of polymerization of poly- methene urea is higher in material, and fertilizer nitrogen rate of release is excessively slow, and fertilizer efficiency period is too long.
A specific example according to the present invention, above-mentioned steps can specifically include: be added one in ureaformaldehyde reaction kettle
Quantitative formalin (aqueous solution of content of formaldehyde >=35%), and adjust pH with gas ammonia and form slight alkali environment, by formaldehyde and
The molar ratio (1~2) of urea: 1 is added urea, and heating stirring completes carboxylated addition reaction, forms ureaformaldehyde addition liquid.
S300: mixing granulation processing
It in the step, after metering by ureaformaldehyde addition liquid, is transported in pelletizer, in the acidity that the raw materials such as humic acid provide
Methylenation condensation reaction occurs under environment, and carries out mixing granulation with the mixing in pelletizer, it is special to obtain rice side deep fertilizing
With ureaformaldehyde slow release fertilizer.Under the acidic environment that raw material provides in mixing, the achievable methylenation condensation of ureaformaldehyde addition liquid
Reaction, and then obtain the dedicated ureaformaldehyde slow release fertilizer product of rice side deep fertilizing.
According to some embodiments of the present invention, the proportion of mixing and ureaformaldehyde addition liquid can pass through humic acid source in mixing
Quality determines, specifically, the weight ratio of humic acid source and ureaformaldehyde addition liquid can be (1~2): (2~4).By using
The humic acid source and ureaformaldehyde addition liquid match, and humic acid source can provide suitable acidic environment for ureaformaldehyde addition liquid, from
And be further conducive to the yield of ureaformaldehyde slow release fertilizer product and the promotion of performance.In addition, it is according to the present invention other
Embodiment, according to different zones and the characteristic of rice, the weight ratio of mixing and ureaformaldehyde addition liquid can for 1000:(20~
120).In other words, based on the mixing of 1000kg, the additive amount of ureaformaldehyde addition liquid can be 20~120kg.
According to an embodiment of the invention, the time that above-mentioned mixing granulation processing carries out can be 15~30min.As a result, may be used
Further be conducive to ureaformaldehyde addition liquid to be sufficiently mixed with mixing, complete methylene under the acidic environment that the raw materials such as humic acid provide
Base condensation reaction.If handled, the time is too short, and ureaformaldehyde addition liquid mixes with being unable to fully with mixing, ureaformaldehyde addition liquid
Methylenation condensation reaction carries out not exclusively, properties of product decline；If processing overlong time, be unfavorable for control technique at
This.
It should be noted that being equally applicable to the preparation described previously for feature and advantage described in ureaformaldehyde slow release fertilizer
The method of ureaformaldehyde slow release fertilizer, this is no longer going to repeat them.
As previously mentioned, ureaformaldehyde slow release fertilizer of the invention and its production method, by by ureaformaldehyde be sustained prilling with
Microelement effectively combines in humic acid, chelating, carries out the production of rice side deep fertilizing Special slow release fertilizer, has the advantage that
(1) ureaformaldehyde technology is used, product particle intensity >=30N, hygroscopicity is small, can satisfy wanting for side deep fertilizing device
It asks, and there is good sustained release performance；
(2) by the humic acid of addition, both acid condition can be provided for the methylenation condensation reaction of ureaformaldehyde, moreover it is possible to
Play the role of improvement soil in application, improves rice yield；
(3) add middle microelement in the form of chelating based on, the suction of rice centering microelement can be further increased
It receives, improves plant recovery of nutrient；
(4) it is directed to the growth demand of rice, potassium formula in phosphorus, nutrient formula science are suitable for rice in selection high nitrogen
Nutrient demand.
Below with reference to specific embodiment, present invention is described, it should be noted that these embodiments are only to describe
Property, without limiting the invention in any way.
Embodiment 1
With reference to Fig. 2, the dedicated ureaformaldehyde slow release fertilizer 21-15-16Cl (Fig. 2 of rice side deep fertilizing is prepared according to the following steps
In: 1- raw material cabin；2- measuring belt；3- blender；4- raw material belt；5- crusher；6- powder feed belt；7- ureaformaldehyde is anti-
Answer kettle；8- ureaformaldehyde dashpot；9- roller pelletizer):
(1) by 370kg urea, 300kg monoammonium phosphate, 265kg potassium chloride, 10kg humic acid original powder, 10kg ammonium polyphosphate
Chelated zinc, 20kg sodium metasilicate after metering, are mixed using blender, then are added to roller pelletizer after crusher crushes
It is interior；
(2) be added formalin in ureaformaldehyde reaction kettle, and with the pH value that ammonia adjusts formalin be 9~
10, by the molar ratio (1~2) of formaldehyde and urea: 1 is added urea, obtains ureaformaldehyde addition liquid；By 40kg ureaformaldehyde addition liquid
(solid content about 25kg) is kept in ureaformaldehyde dashpot, is added in roller pelletizer after metering, in roller pelletizer
Other composite fertilizer materials be granulated together；
(3) in roller pelletizer, under 60~80 DEG C of prilling temperature, ureaformaldehyde addition liquid the raw materials such as humic acid provide
Acid material under the conditions of, material gradually solidifies granulating；
(4) after granulating material such as is further dried, is cooled down, sieved, wrapped up at the processing, as rice side deep fertilizing ureaformaldehyde is slow
Release fertile 21-15-16Cl finished product.
Embodiment 2
With reference to Fig. 2, the dedicated ureaformaldehyde slow release fertilizer 26-10-12Cl of rice side deep fertilizing is prepared according to the following steps:
(1) by 490kg urea, 230kg monoammonium phosphate, 200kg potassium chloride, 15kg humic acid original powder, 10kg ammonium polyphosphate
Chelated zinc, 30kg sodium metasilicate after metering, are mixed using blender, then are added to roller pelletizer after crusher crushes
It is interior；
(2) be added formalin in ureaformaldehyde reaction kettle, and with the pH value that ammonia adjusts formalin be 9~
10, by the molar ratio (1~2) of formaldehyde and urea: 1 is added urea, obtains ureaformaldehyde addition liquid；By 40kg ureaformaldehyde addition liquid
(solid content about 25kg) is kept in ureaformaldehyde dashpot, is added in roller pelletizer after metering, in roller pelletizer
Other composite fertilizer materials be granulated together；
(3) in roller pelletizer, under 60~80 DEG C of prilling temperature, ureaformaldehyde addition liquid the raw materials such as humic acid provide
Acid material under the conditions of, material gradually solidifies granulating；
(4) after granulating material such as is further dried, is cooled down, sieved, wrapped up at the processing, as rice side deep fertilizing ureaformaldehyde is slow
Release fertile 26-10-12Cl finished product.
Embodiment 3
The dedicated ureaformaldehyde slow-release fertilizer finished product of 21-15-16Cl rice side deep fertilizing prepared in Example 1 is carried out using examination
It tests.
Test site: Heilongjiang Province Fangzheng County；
Experimental field soil basic condition: soil types is meadow soil, in soil fertility on；Labile soil organic carbon is shown in Table 1:
1 Labile soil organic carbon data of table
Test rice varieties: rice No. 10 local conventional rice kind: are cultivated；
Test method: rice growing seedling mid-April was tested according to table 2 and is arranged on May 20, fertilising, rice transplanting, 1 after rice transplanting
Week, tillering fertilizer was applied in left and right, and July 10, Shi Suifei, it is consistent respectively to handle field management measure.Harvest was surveyed and produced weighing mid-October.
2 paddy rice in cold region fertilizer treatment of table
Test result is shown in Table 3:
3 paddy rice in cold region yield index of table summarizes
Table 3 shows to apply fertilizer of the invention, and northeast paddy rice in cold region effect of increasing production is obvious, under the conditions of similarly spreading fertilizer over the fields,
Than local conventional Blending Fertilizer volume increase 7.43%, than certain brand paddy rice-dedicated fertilizer volume increase 4.13%；Using side deep fertilizing mode, volume increase
Amplitude significantly improves, compared with local conventional Blending Fertilizer, volume increase 13.02%, and compared with certain brand paddy rice-dedicated fertilizer, volume increase
9.55%.
Embodiment 4
The dedicated ureaformaldehyde slow-release fertilizer finished product of 26-10-12Cl rice side deep fertilizing prepared in Example 2 is carried out using examination
It tests.
Test site: Danyang, Jiangsu Province Yanlin town；
Experimental field soil basic condition: soil types is yellowish-white soil, in soil fertility on, Labile soil organic carbon see the table below 4:
4 Labile soil organic carbon data of table
Test rice varieties: local conventional rice kind: southern round-grained rice 9108；
Test method: rice growing seedling mid-May was tested according to table 5 and is arranged on June 17, fertilising, rice transplanting, 1 after rice transplanting
Week, tillering fertilizer was applied in left and right, and it is consistent respectively to handle field management measure by August Shi Suifei on the 12nd；Harvest was surveyed and produced weighing mid-November.
5 south rice fertilizer treatment of table
Test result is shown in Table 6:
6 south rice yield index of table summarizes
Table 6 shows application fertilizer of the present invention, and south rice effect of increasing production is obvious, under the conditions of similarly spreading fertilizer over the fields, than locality
Conventional Blending Fertilizer volume increase 9.97%, than certain brand paddy rice-dedicated fertilizer volume increase 3.54%；Using side deep fertilizing mode, amount of increase in production is aobvious
It writes and improves, compared with local conventional Blending Fertilizer, volume increase 13.63%, compared with certain brand paddy rice-dedicated fertilizer, volume increase 6.98%.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office
It can be combined in any suitable manner in one or more embodiment or examples.In addition, without conflicting with each other, the skill of this field
Art personnel can tie the feature of different embodiments or examples described in this specification and different embodiments or examples
It closes and combines.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, modifies, replacement and variant.
Claims (10)
1. a kind of dedicated ureaformaldehyde slow release fertilizer of rice side deep fertilizing characterized by comprising
The P of the N of 19~26 parts by weight, 10~15 parts by weight2O5, 12~16 parts by weight K2O, the Zn of 0.1~0.5 parts by weight and
The Si of 0.5~1.0 parts by weight；Wherein, the N includes the ureaformaldehyde slow-release nitrogen of 0.8~4.8 parts by weight.
2. ureaformaldehyde slow release fertilizer according to claim 1, which is characterized in that further comprise: 0.1~3.0 parts by weight
Humic acid.
3. the dedicated ureaformaldehyde slow release fertilizer of rice side deep fertilizing according to claim 2, which is characterized in that
The N is from least one of urea, ammonium chloride, ammonium sulfate, monoammonium phosphate and Diammonium phosphate (DAP)；
The P2O5From at least one of monoammonium phosphate, Diammonium phosphate (DAP), general calcium, coarse whiting and potassium dihydrogen phosphate；
The K2O is from least one of potassium sulfate, potassium chloride, potassium dihydrogen phosphate and potassium nitrate；
The humic acid comes from least one of humic acid original powder, humic acid potassium, ammonium humate；
The Zn in EDTA chelated zinc, zinc-amino acid chelate, poly-aspartate chelated zinc and ammonium polyphosphate chelated zinc extremely
It is one of few；
The Si is from least one of sodium metasilicate, sodium metasilicate, potassium silicate and mistake sodium disilicate.
4. a kind of method for preparing the dedicated ureaformaldehyde slow release fertilizer of the described in any item rice side deep fertilizings of claims 1 to 3,
It is characterized in that, comprising:
(1) nitrogen source, phosphorus source, potassium resource, zinc source and silicon source are mixed, obtains mixing；
(2) formalin is mixed to urea and carried out carboxylated addition reaction, obtains ureaformaldehyde addition liquid；
(3) the ureaformaldehyde addition liquid of step (2) and the mixing of step (1) are subjected to mixing granulation, wherein the ureaformaldehyde addition
Liquid completes methylenation condensation reaction under acidic environment, obtains the dedicated ureaformaldehyde slow release fertilizer of the rice side deep fertilizing.
5. according to the method described in claim 4, it is characterized in that, in step (1), by nitrogen source, phosphorus source, potassium resource, humic acid source,
Zinc source and silicon source are mixed, and the mixing is obtained.
6. according to the method described in claim 5, it is characterized in that, being the methylene by the humic acid source in step (3)
Change condensation reaction and acidic environment is provided；
Optionally, the pH value of the acidic environment is 5.5~6.5.
7. according to the method described in claim 6, it is characterized in that, the content of formaldehyde is not less than 35v% in the formalin.
8. according to the method described in claim 6, it is characterized in that, being added in step (2), in Xiang Suoshu formalin alkaline molten
Liquid is to adjust the pH value of the formalin to 9~10；
Optionally, the alkaline solution is selected from least one of NaOH solution, KOH solution and ammonium hydroxide.
9. according to the method described in claim 5, it is characterized in that, the weight in the humic acid source and the ureaformaldehyde addition liquid
Than for (1~2): (2~4)；
Optionally, the weight ratio of the mixing and the ureaformaldehyde addition liquid is 1000:(20~120).
10. according to the method described in claim 6, it is characterized in that, formaldehyde in the formalin and the urea rub
You are than being (1~2): 1；
Optionally, the time that the mixing granulation processing carries out is 15~30min.
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