CN109336683A - A kind of alginic acid synergistic carrier preparation method of the urea suitable for acid soil - Google Patents
A kind of alginic acid synergistic carrier preparation method of the urea suitable for acid soil Download PDFInfo
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- CN109336683A CN109336683A CN201811328583.5A CN201811328583A CN109336683A CN 109336683 A CN109336683 A CN 109336683A CN 201811328583 A CN201811328583 A CN 201811328583A CN 109336683 A CN109336683 A CN 109336683A
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05B—PHOSPHATIC FERTILISERS
- C05B7/00—Fertilisers based essentially on alkali or ammonium orthophosphates
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
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Abstract
The present invention relates to the urea alginic acid synergistic carrier preparation method for being suitable for acid soil, which includes the preparation of alginic acid organic extractant, the preparation of alginic acid extracting solution and the preparation of alginic acid synergistic carrier.After alginic acid synergistic carrier is in conjunction with urea, the conversion rate of urea can be improved by promoting granular urea 1cm fertilizer border soil pH (0.3~1 unit), urea is substantially less than commercial urea processing 36.2%~54.3% in fertile border 2cm, provides new approaches to improve the urea utilization rate of nitrogen fertilizer of acid soil.Compared with commercial urea, the rice yield of alginic acid urea of the present invention improves 10.4%, and utilization rate of nitrogen fertilizer improves 7.7 percentage points.
Description
[technical field]
The invention belongs to technical field of fertilizer production.More particularly it relates to a kind of urea suitable for acid soil
With alginic acid synergistic carrier preparation method.
[background technique]
Urea is the most important nitrogen fertilizers in China, but its need to be converted into ammonium nitrogen and nitrate nitrogen after just can be by crop
It is absorbed and utilized.China's acidified soil area accounts for the 23% of national total area, and most area soil pHs are 5.5 hereinafter, serious person is low
In 4.5, and acidizing degree and area are still increasing.Since the microbial activity of acid soil is low, urease activity is in extremely low water
Flat, urea is slower to ammonium nitrogen and nitrate nitrogen conversion rate, is not able to satisfy demand of the plant growth critical period to nitrogen, due to
Urea nonpolarity, is easy to be moved to other than root layer with irrigation water or runoff, leads to nutrient loss and environmental risk.Therefore, in acid
Property soil application urea, should not only slow down its conversion, and should accelerate its conversion rate.Urea synergistic carrier is ground at present
Hair concentrates on how enhancing the slow release and stability of urea.Using alginic acid as primary raw material, how to prepare suitable for acid soil
The urea of earth is particularly significant to urea utilization rate of nitrogen fertilizer is improved with alginic acid synergistic carrier, but basic research and product development equal ten
Divide lag.
CN102701866A discloses a kind of fermentation liquid seaweed extract material synergist and its production method and purposes, with natural sea
Algae is raw material, through microbial fermentation, then taken with alkali carries, the processes such as filters pressing produce seaweed extracted liquor, then to adding chela in liquid
State microelement is closed, fermentation alga liquid fertilizer synergist of the invention is obtained.CN 104761413A discloses a kind of with ammonia volatilization
Alginic acid fertilizer synergist of inhibiting effect and preparation method thereof, based on kelp, strain, carbon source, nitrogen source, middle microelement etc.
Want raw material, the processes preparation such as fermented, extraction, compounding.A kind of whole biologic enzymolysis method of CN107236766A prepares seaweed plants
The method of growth regulator, including produce before preparation, the pretreatment of raw material, level-one enzymatic hydrolysis, enzymolysis liquid removal of impurities, enzymolysis liquid homogeneous,
Secondary enzymolysis, post-processing, the isolating and purifying of somatotropin, nine steps such as fertilizer is matched eventually.It yet there are no related be suitable for
Patent application and its related data of the urea of acid soil with alginic acid synergistic carrier.
Therefore, the present inventor, for technical problem of the existing technology, passes through on the basis for summarizing the prior art
Lot of experiments and analysis work, complete the present invention finally.
[summary of the invention]
[technical problems to be solved]
The object of the present invention is to provide a kind of urea suitable for acid soil alginic acid synergistic carrier preparation methods.
[technical solution]
The present invention is achieved through the following technical solutions.
The present invention relates to a kind of urea suitable for acid soil alginic acid synergistic carrier preparation methods.
The step of urea alginic acid synergistic carrier preparation method, is as follows:
A, prepared by alginic acid organic extractant
2~5 parts by weight potassium salicylates, which are added to 100~200 parts by weight temperature with 1~3 parts by weight dimethylformamide, is
In 60~70 DEG C of water, stirring and dissolving is cooling, obtains the alginic acid organic extractant；
B, prepared by alginic acid extracting solution
100 parts by weight seawood meals are added to the alginic acid organic extractant that 800~1500 parts by weight are obtained in step A
In, its temperature is then gradually increased to 70~90 DEG C under stiring, and keep 6~12h at this temperature, is then cooled to room
Temperature, centrifuge separation, sediment discard, and obtain the alginic acid extracting solution；
C, prepared by alginic acid synergistic carrier
It is that the nitric acid that 2% peroxophosphoric acid is by weight 2% with concentration by weight is mixed according to weight ratio 1:1 by concentration
It is even, obtain a kind of nitration mixture；The nitration mixture is added slowly in the alginic acid extracting solution that step B is obtained, by the pH value of its extracting solution
3~5 are adjusted to, is then heated to 60~80 DEG C of temperature, under stiring, is slowly added into 1000 parts by weight alginic acid extracting solutions
5 parts by weight benzoyl peroxides, then react 120min, add 10 parts by weight uronic acids, 10 parts by weight oligosaccharide and 10 weights
Part sugar alcohol is measured, continues to be stirred to react 60min, adds 10~20 parts by weight of polyoxyethylene ethers and 2~5 parts by weight phthalic acids
Alkylamide, it is cooling, its pH value is adjusted to 7.5~9.0 using potassium pyrophosphate aqueous solution, obtains described being suitable for acid soil
Urea alginic acid synergistic carrier.
A preferred embodiment of the invention, in step, the weight of potassium salicylate, dimethylformamide and water
Measuring ratio is 2.6~4.5:1.5~2.5:120~180.
According to another preferred method of implementation of the present invention, in step, it will be stirred under conditions of 60~180rpm of revolving speed
It mixes the solution that dissolution obtains and is cooled to 40 DEG C of temperature or less.
According to another preferred method of implementation of the present invention, in stepb, the seaweed is brown alga, bulk kelp or bubble leaf
Algae；The granularity of the seawood meal is less than 2mm.
According to another preferred method of implementation of the present invention, in stepb, under conditions of 1000~5000rpm of revolving speed
It is centrifugated 10~40min.
According to another preferred method of implementation of the present invention, in step C, the uronic acid is glucuronic acid or half
Lactobionic acid.
According to another preferred method of implementation of the present invention, in step C, the oligosaccharide is malto-oligosaccharide or big
Beans oligosaccharide.
According to another preferred method of implementation of the present invention, in step C, the sugar alcohol is D-sorbite, maltose
Alcohol or xylitol.
According to another preferred method of implementation of the present invention, in step C, polyoxyethylene ether and phthalic acid alkane is added
Its solution is cooled to 10~35 DEG C of temperature after base amide.
According to another preferred method of implementation of the present invention, in step C, the concentration of the potassium pyrophosphate aqueous solution is 1
~5mol/L.
The present invention is described in more detail below.
The present invention relates to a kind of urea suitable for acid soil alginic acid synergistic carrier preparation methods.
The step of urea alginic acid synergistic carrier preparation method, is as follows:
A, prepared by alginic acid organic extractant
2~5 parts by weight potassium salicylates, which are added to 100~200 parts by weight temperature with 1~3 parts by weight dimethylformamide, is
In 60~70 DEG C of water, stirring and dissolving is cooling, obtains the alginic acid organic extractant；
On the one hand the potassium salicylate that the present invention uses can react with seaweed powder raw material in alkalinity, potassium salicylate and extract seaweed
On the other hand acid can enrich the carboxyl and hydroxy functional group of alginic acid.The potassium salicylate that the present invention uses is to sell currently on the market
The product sold, such as the product that Wuhan Bell card biological medicine Co., Ltd is sold with trade name potassium salicylate sodium.
Dimethylformamide is a kind of organic base, it can be reacted with acidic-groups such as carboxyl, phenolic hydroxyl groups in alginic acid and
Water soluble algae acid is generated, so as to extract alginic acid from seaweed raw material, and it also can increase in seaweed extracted liquor
In methyl, methoxy functional mass contg.The dimethylformamide that the present invention uses is current market sales of product, such as
The product sold by Nanjing Ke Zheng Chemical Co., Ltd. with trade name N,N-dimethylformamide (DMF).
In the present invention, when the dosage of dimethylformamide is in the range, if potassium salicylate dosage is lower than 2 weight
Part, then alginic acid recovery rate can be reduced, the effect of its functional group is limited to enriching；If sodium potassium tartrate tetrahydrate dosage is higher than 5 parts by weight,
Then can alginic acid extracting solution alkalinity it is too strong, influence the oxidation effectiveness of next step.Therefore, the dosage of potassium salicylate is 2~5 parts by weight
It is suitable, preferably 2.6~4.5 parts by weight.
It, can if the dosage of dimethylformamide is lower than 1 parts by weight when the dosage of potassium salicylate is in the range
Reduce alginic acid recovery rate；If the dosage of dimethylformamide is higher than 3 parts by weight, it will lead in alginic acid extraction process
Liquid bubble is excessive, and tiny impurity is mixed in alginic acid liquid, the alginic acid purity liquid decline of extraction；Therefore, dimethyl
The dosage of formamide is that 1~3 parts by weight are suitable, preferably 1.5~2.5 parts by weight.
Preferably, the weight ratio of potassium salicylate, dimethylformamide and water is 2.6~4.5:1.5~2.5:120~180.
According to the present invention, stirring and dissolving is obtained under conditions of 60~180rpm of revolving speed by raw materials such as dimethylformamides
Solution is cooled to 40 DEG C of temperature or less.
B, prepared by alginic acid extracting solution
100 parts by weight seawood meals are added to the alginic acid organic extractant that 800~1500 parts by weight are obtained in step A
In, its temperature is then gradually increased to 70~90 DEG C under stiring, and keep 6~12h at this temperature, is then cooled to room
Temperature, centrifuge separation, sediment discard, and obtain the alginic acid extracting solution；
According to the present invention, the seaweed is brown alga, bulk kelp or yellow tang, and the seaweed that the present invention uses all is existing market
The product of upper sale, such as the brown alga that the present invention uses is the brown alga sold by the friendly company of Yantai Long Island three with trade name kelp；
The bulk kelp that the present invention uses is the bulk kelp sold by Shaanxi Si Nuote Bioisystech Co., Ltd with trade name bulk kelp original powder.
According to the present invention, brown alga, bulk kelp or yellow tang are crushed using existing conventional crushing plant, it is small collects granularity
Alginic acid extracting solution is prepared as raw material in the seawood meal of 2mm.
In the present invention, when seaweed powder raw material is 100 parts by weight, if the extractant dosage is lower than 800 parts by weight,
It will lead to that liquid is thick to be difficult to carry out subsequent centrifugal treating；If the extractant dosage is higher than 1500 parts by weight, will lead to
The alginic acid liquid water content of extraction is high, influences the application in urea.Therefore, the seaweed organic extractant dosage is 800
~1500 parts by weight are appropriate.
In this step, seawood meal and alginic acid organic extractant are mixed in the case where revolving speed is the stirring of 100~200rpm
The temperature for closing object is gradually increased to 70~90 DEG C, and keeps 6~12h at this temperature.Its extraction time is more than that the range is
It is worthless.If extraction time is shorter than 6h, alginic acid is extracted not exclusively, and alginic acid is caused to lose；If extraction time is super
12h is crossed, then causes the energy consumption for extracting alginic acid to increase, increased costs.Therefore, it is feasible that alginic acid extraction time, which is 6~12h,
's.
According to the present invention, the extract being cooled to room temperature using centrifuge under conditions of 1000~5000rpm of revolving speed from
The heart separates 10~40min.The centrifuge is the product sold on existing market, such as by ShangHai City centrifugal Machine Institute
Co., Ltd separates the product of sleeping spiral shell sedimentation centrifuge sale with trade name two-phase.
C, prepared by alginic acid synergistic carrier
It is that the nitric acid that 2% peroxophosphoric acid is by weight 2% with concentration by weight is mixed according to weight ratio 1:1 by concentration
It is even, obtain a kind of nitration mixture；The nitration mixture is added slowly in the alginic acid extracting solution that step B is obtained, by the pH value of its extracting solution
3~5 are adjusted to, is then heated to 60~80 DEG C of temperature, under stiring, is slowly added into 1000 parts by weight alginic acid extracting solutions
5 parts by weight benzoyl peroxides, then react 120min, add 10 parts by weight uronic acids, 10 parts by weight oligosaccharide and 10 weights
Part sugar alcohol is measured, continues to be stirred to react 60min, adds 10~20 parts by weight of polyoxyethylene ethers and 2~5 parts by weight phthalic acids
Alkylamide, it is cooling, its pH value is adjusted to 7.5~9.0 using potassium pyrophosphate aqueous solution, obtains described being suitable for acid soil
Urea alginic acid synergistic carrier.
In the present invention, peroxophosphoric acid had not only been adjusted the pH of alginic acid liquid, but can with the metals such as calcium, magnesium in alginic acid from
Son chelating.Nitric acid can make the aromatic ring of alginic acid access nitro, to improve the dissolubility of alginic acid.
Benzoyl peroxide is a kind of organic oxidizing agent, and the stability of oxidation process can be improved in it.The mistake that the present invention uses
Benzoyl Oxide is current market sales of product, such as Guangzhou Sanming City Chemical Co., Ltd. with trade name benzoyl peroxide first
The product of acyl sale.
The uronic acid that the present invention uses is glucuronic acid or galacturonic acid.The oligosaccharide that the present invention uses is that malt is low
Glycan or soyabean oligosaccharides.The sugar alcohol that the present invention uses is D-sorbite, maltitol or xylitol.Their major function is
Alginic acid aldehyde radical and small molecule carbon source are provided, soil urease liveness is improved.They are all current market sales of products, such as
Product that Beijing Kai Senlai Science and Technology Ltd. is sold with trade name D-Glucose aldehydic acid, Shanghai Guan Dao bioengineering Co., Ltd
It is low with trade name malt with the product of trade name D- galacturonic acid sale, hundred garden Long Chuan biotech inc of Shandong
The product that the product of glycan sale, Yucheng City Heng Yi Biotechnology Co., Ltd are sold with trade name D-sorbite.
In the present invention, polyoxyethylene ether has both resin and nonionic surfactant performance, can not only be used for stationary phase into
One step slows down movement of the urea in the soil liquid, and as bleeding agent, promotes the combination of alginic acid and urea.Phthalic acid
Alkylamide is nonionic surfactant, it can enhance the osmotic effect of polyoxyethylene ether and to improve synergistic carrier steady
It is qualitative.The polyoxyethylene ether and O-phthalic alkanol amides that the present invention uses all are current market sales of products, such as
The product sold by Jiangsu Hai'an Petrochemical Plant with trade name polyoxyethylene ether polyoxyethylene nonylphenol ether -7, by Guangzhou Zong Yu chemical industry section
The product that skill Co., Ltd is sold with trade name suspension stabilizer TAB-2 O-phthalic alkanol amides.
In the present invention, when O-phthalic alkanol amides dosage is 2~5 parts by weight, if polyoxyethylene ether dosage is low
In 10 parts by weight, then its dispersion and permeance property are unobvious；If polyoxyethylene ether dosage is higher than 20 parts by weight, it can make
The viscosity of alginic acid synergistic carrier is excessively high；Therefore, it is appropriate that polyoxyethylene ether dosage, which is 10~20 parts by weight,.
Similarly, when polyoxyethylene ether dosage is 10~20 parts by weight, if O-phthalic alkanol amides dosage is lower than 2
Parts by weight are not then significant to the osmotic effect for strengthening polyoxyethylene ether；If O-phthalic alkanol amides dosage is higher than 5 weight
Part, then influence the dispersion performance of polyoxyethylene ether；Therefore, it is appropriate that the dosage of O-phthalic alkanol amides, which is 2~5 parts by weight,
's.
According to the present invention, be added after polyoxyethylene ether and O-phthalic alkanol amides by its solution be cooled to temperature 10~
35℃。
In the present invention, potassium pyrophosphate can extract the alginic acid for adding polyoxyethylene ether and O-phthalic alkanol amides
The pH of liquid is adjusted to alkalescent, and the water solubility of calcium and magnesium ion can be improved.If this pH value, less than 7.5, the alginic acid increases
The concentration and mobility for imitating carrier reduce；If this pH value is greater than 9.0, the alkalinity of the alginic acid synergistic carrier is higher, no
It is suitable for being added in urea.According to the present invention, the concentration of the potassium pyrophosphate aqueous solution is 1~5mol/L.
The present invention, which prepares alginic acid synergistic carrier, to produce high nitrogen in conjunction with urea production process or granular urea product
The new urea product of fertile utilization rate.
The application method of alginic acid synergistic carrier of the present invention is as follows:
First method: in urea production process, the alginic acid synergy of 5~50 parts by weight the method for the present invention preparation is carried
Body is added in 1000 parts by weight of urea molten liquids, sprays to obtain the granular urea of synergistic carrier containing alginic acid through high tower.
Second method: 5~50 parts by weight are added to 1000 parts by weight temperature in alginic acid synergistic carrier prepared by step C
It in 40~75 DEG C of granular ureas, to be quickly stirred 2min, then dries at 100 DEG C of temperature, obtains synergy containing alginic acid
The granular urea of carrier.
[beneficial effect]
The beneficial effects of the present invention are:
1, the present invention is from another angle, to provide suitable for the research and development of acid soil urea alginic acid synergistic carrier
New thinking.
2, after alginic acid synergistic carrier is in conjunction with urea, after alginic acid synergistic carrier is in conjunction with urea, promotion can be passed through
Grain urea 1cm fertilizer border 0.3~1 unit of soil pH, improves the conversion rate of urea, urea is substantially less than commercially available in fertile border 2cm
35% or more Urea treatment.
3, promote crop root growth, improve root activity, from the angle raising utilization rate of fertilizer for promoting Nutrient Absorption.With
Commercial urea is compared, and the rice yield of alginic acid urea of the present invention improves 10.4%, and utilization rate of nitrogen fertilizer improves 7.7 percentage points.
[specific embodiment]
It will be better understood that the present invention by following embodiments.
One, embodiment is prepared
Embodiment 1: prepared by the urea alginic acid synergistic carrier suitable for acid soil
The implementation steps of the embodiment are as follows:
A, prepared by alginic acid organic extractant
2 parts by weight potassium salicylates and 1.6 parts by weight dimethylformamides are added to the water that 170 parts by weight temperature are 60 DEG C
In, stirring and dissolving under conditions of revolving speed 120rpm is cooled to 40 DEG C of temperature hereinafter, obtaining the organic extraction of alginic acid
Agent；
B, prepared by alginic acid extracting solution
Kelp brown alga powder raw material by 100 parts by weight granularities less than 2mm is added to 1000 parts by weight in the sea that step A is obtained
In alginic acid organic extractant, its temperature is then gradually increased to 90 DEG C in the case where revolving speed is the stirring of 180rpm, and in this temperature
Lower holding 10h, is then cooled to room temperature, is centrifugated 26min under conditions of revolving speed 1000rpm, and precipitating discards, and obtains described
Alginic acid extracting solution；
C, prepared by alginic acid synergistic carrier
It is that the nitric acid that 2% peroxophosphoric acid is by weight 2% with concentration by weight is mixed according to weight ratio 1:1 by concentration
It is even, obtain a kind of nitration mixture；The nitration mixture is added slowly in the alginic acid extracting solution that step B is obtained, by the pH value of its extracting solution
3.0 are adjusted to, temperature 60 C is then heated to, under stiring, is slowly added to 5 weight into 1000 parts by weight alginic acid extracting solutions
Part benzoyl peroxide, then reacts 120min, adds 10 parts by weight glucuronic acids, 10 parts by weight malto-oligosaccharides and 10
Parts by weight D-sorbite continues to be stirred to react 60min, adds 18 parts by weight of polyoxyethylene ethers and 2 parts by weight phthalic acids
Alkylamide is cooled to 10 DEG C, its pH value is adjusted to 8.0 using the potassium pyrophosphate aqueous solution that concentration is 1mol/L, obtains institute
The alginic acid synergistic carrier suitable for acid soil stated.
Embodiment 2: prepared by the urea alginic acid synergistic carrier suitable for acid soil
The implementation steps of the embodiment are as follows:
A, prepared by alginic acid organic extractant
3 parts by weight potassium salicylates and 1.0 parts by weight dimethylformamides are added to the water that 100 parts by weight temperature are 64 DEG C
In, stirring and dissolving under conditions of revolving speed 60rpm is cooled to 40 DEG C of temperature hereinafter, obtaining the alginic acid organic extractant；
B, prepared by alginic acid extracting solution
Bulk kelp original powder by 100 parts by weight granularities less than 2mm is added to 800 parts by weight to be had in the alginic acid that step A is obtained
In machine extractant, its temperature is then gradually increased to 70 DEG C in the case where revolving speed is the stirring of 100rpm, and keep at this temperature
8h is then cooled to room temperature, is centrifugated 15min under conditions of revolving speed 2400rpm, and precipitating discards, and obtains the seaweed
Sour extracting solution；
C, prepared by alginic acid synergistic carrier
It is that the nitric acid that 2% peroxophosphoric acid is by weight 2% with concentration by weight is mixed according to weight ratio 1:1 by concentration
It is even, obtain a kind of nitration mixture；The nitration mixture is added slowly in the alginic acid extracting solution that step B is obtained, by the pH value of its extracting solution
5.0 are adjusted to, is then heated to 80 DEG C of temperature, under stiring, is slowly added to 5 weight into 1000 parts by weight alginic acid extracting solutions
Part benzoyl peroxide, then reacts 120min, adds 10 parts by weight galacturonic acids, 10 parts by weight of soybean oligosaccharide and 10
Parts by weight maltitol continues to be stirred to react 60min, adds 10 parts by weight of polyoxyethylene ethers and 4 parts by weight phthalic acids
Alkylamide is cooled to 25 DEG C, its pH value is adjusted to 7.5 using the potassium pyrophosphate aqueous solution that concentration is 2mol/L, obtains institute
The alginic acid synergistic carrier suitable for acid soil stated.
Embodiment 3: prepared by the urea alginic acid synergistic carrier suitable for acid soil
The implementation steps of the embodiment are as follows:
A, prepared by alginic acid organic extractant
4 parts by weight potassium salicylates and 3.0 parts by weight dimethylformamides are added to the water that 200 parts by weight temperature are 70 DEG C
In, stirring and dissolving under conditions of revolving speed 90rpm is cooled to 40 DEG C of temperature hereinafter, obtaining the alginic acid organic extractant；
B, prepared by alginic acid extracting solution
Yellow tang powder raw material by 100 parts by weight granularities less than 2mm is added to the seaweed that 1500 parts by weight are obtained in step A
In sour organic extractant, its temperature is then gradually increased to 80 DEG C in the case where revolving speed is the stirring of 200rpm, and at this temperature
12h is kept, room temperature is then cooled to, is centrifugated 10min under conditions of revolving speed 5000rpm, precipitating discards, and obtains described
Alginic acid extracting solution；
C, prepared by alginic acid synergistic carrier
It is that the nitric acid that 2% peroxophosphoric acid is by weight 2% with concentration by weight is mixed according to weight ratio 1:1 by concentration
It is even, obtain a kind of nitration mixture；The nitration mixture is added slowly in the alginic acid extracting solution that step B is obtained, by the pH value of its extracting solution
3.6 are adjusted to, is then heated to 74 DEG C of temperature, under stiring, is slowly added to 5 weight into 1000 parts by weight alginic acid extracting solutions
Part benzoyl peroxide, then reacts 120min, adds 10 parts by weight glucuronic acids and galacturonic acid blend (weight
Than 1:1), 10 parts by weight malto-oligosaccharides and soyabean oligosaccharides mixture (weight ratio 2:1) and 10 parts by weight D-sorbite xyloses
Alcohol continues to be stirred to react 60min, adds 20 parts by weight of polyoxyethylene ethers and 5 parts by weight O-phthalic alkanol amides, cooling
To 35 DEG C, its pH value is adjusted to 9.0 using the potassium pyrophosphate aqueous solution that concentration is 3mol/L, obtains described being suitable for acid soil
The alginic acid synergistic carrier of earth.
Embodiment 4: prepared by the urea alginic acid synergistic carrier suitable for acid soil
The implementation steps of the embodiment are as follows:
A, prepared by alginic acid organic extractant
5 parts by weight potassium salicylates and 2.4 parts by weight dimethylformamides are added to the water that 140 parts by weight temperature are 68 DEG C
In, stirring and dissolving under conditions of revolving speed 180rpm is cooled to 40 DEG C of temperature hereinafter, obtaining the organic extraction of alginic acid
Agent；
B, prepared by alginic acid extracting solution
Wild kelp brown alga powder raw material by 100 parts by weight granularities less than 2mm is added to 1200 parts by weight and obtains in step A
Alginic acid organic extractant in, its temperature is then gradually increased to 80 DEG C in the case where revolving speed is the stirring of 140rpm, and at this
At a temperature of keep 6h, be then cooled to room temperature, be centrifugated 40min under conditions of revolving speed 1000rpm, precipitating discards, and obtains
The alginic acid extracting solution；
C, prepared by alginic acid synergistic carrier
It is that the nitric acid that 2% peroxophosphoric acid is by weight 2% with concentration by weight is mixed according to weight ratio 1:1 by concentration
It is even, obtain a kind of nitration mixture；The nitration mixture is added slowly in the alginic acid extracting solution that step B is obtained, by the pH value of its extracting solution
4.4 are adjusted to, is then heated to 66 DEG C of temperature, under stiring, is slowly added to 5 weight into 1000 parts by weight alginic acid extracting solutions
Part benzoyl peroxide, then reacts 120min, adds 10 parts by weight glucuronic acids and galacturonic acid blend (weight
Than 1:3), 10 parts by weight malto-oligosaccharides and soyabean oligosaccharides mixture (weight ratio 2:3) and 10 parts by weight D-sorbites, malt
Sugar alcohol and xylitol blend (weight ratio 1:1:1), continue to be stirred to react 60min, add 14 parts by weight of polyoxyethylene ethers and 3
Parts by weight O-phthalic alkanol amides, are cooled to 30 DEG C, using the potassium pyrophosphate aqueous solution that concentration is 5mol/L by its pH value
8.5 are adjusted to, the alginic acid synergistic carrier suitable for acid soil is obtained.
Two, test example
Test example 1: influence of the alginic acid synergistic carrier of the present invention to urea fertilizer border soil pH, urea nitrogen
Sample preparation: alginic acid synergistic carrier prepared by embodiment 1, embodiment 2 and embodiment 4 is according to it and urea
Weight ratio 3:100 is added separately in granular urea, after cooling, respectively obtains alginic acid urea A, alginic acid urea B and seaweed
Uraturia element C.Meanwhile commercial urea U (Group Plc of Rising, nitrogen content 46%) is handled in the same way, it obtains
The sample arrived is control sample.
150g urea sample prepared above is weighed respectively, is placed in length × width × height=5cm × 5cm × 5cm, and aperture is
In the stainless steel cloth mold of 0.5mm, obtain square urea U, square alginic acid urea A, square alginic acid urea B,
Square alginic acid urea C.
Test procedure: square urea U, square alginic acid urea A, B, C are placed in the red soil of water content 19% respectively
In (Nanchang), compacting soil to bulk density 1.3 is cultivated 12 hours at 25 ± 2 DEG C of temperature.After culture, with blade point
The soil apart from square urea edge 1.5-2.0cm, 1.0-1.5cm, 0.5-1.0cm, 0-0.5cm is not cut out.According to (Shandong is such as
Female " soil agrochemistry analysis method " Beijing: Chinese agriculture Science Press, 2000.) standard method of analysis test pros
PH, urea nitrogen in the soil of body urea fertilizer border.The test result is listed in Table 1 below.
Table 1: fertile border soil pH, the urea nitrogen comparision contents of alginic acid urea and commercial urea
The urease activity of red soil is lower, and urea conversion is slower, is not able to satisfy demand of the crop to ammonium nitrogen and nitrate nitrogen.Fertilizer
Border is the initial period of fertilizer conversion, decides the urea conversion process in later period.These test results show prepared by the present invention
Alginic acid synergistic carrier can be obviously improved the soil pH within granular urea fertilizer border soil pH, especially promotion fertilizer border 1cm, be promoted
0.3~1 pH unit of amplitude, i.e. OH in the soil liquid of fertilizer border-Concentration improves 3~10 times；Urea content is significant in fertile border 2cm
Lower than commercial urea processing 36.2%~54.3%, illustrate that the decomposition of alginic acid urea and conversion rate are obviously accelerated.
Test example 2: using alginic acid synergistic carrier of the present invention preparation alginic acid urea to Rice In Guangdong yield with
The influence of utilization rate of nitrogen fertilizer
Test carries out in Boluo County of Huizhou City Yangchuan village town, tests soil pH 5.96, organic matter 1.16%, full nitrogen 0.61g/
Kg, full phosphorus (P) 0.62g/kg, alkali-hydrolyzable nitrogen 79mg/kg, OlsenP2O572mg/kg, active potassic2O 32mg/kg sends out for sand shale
The rice soil educated.
All processing use (this test dosage P on the basis of equivalent phosphorus, potassium2O53.6kg/ mus and K2O 8.4kg/ mus),
The following processing of setting:
Processing 1: it compares (CK), not nitrogen fertilizer application；
Handle 2: alginic acid urea AU (12kgN/ mus, utilize the seaweed acid vectors of embodiment 1)；
Handle 3: commercial urea U (12kgN/ mus).
Each processing is repeated four times, random district's groups arrangement, plot area: 3.8 × 6.4m=24.32m2.For trying rice product
Kind is Yuejingsimiao (grain quality rice), and every cell transplants 17 × 26=442 sections, every section 3-4 seedling.Respectively apply nitrogen base manure, tillering stage and
Panicle primordium dif ferentiation stage top dressing respectively accounts for one third, and all processing phosphate fertilizer are all used as base manure.Potash fertilizer 50% makees base manure, and 50% in young fringe
Idiophase top dressing.
Table 2: rice is compared using the grain yield and utilization rate of nitrogen fertilizer of alginic acid urea
The result listed from table 2 can be seen that alginic acid urea of the present invention and improve compared with the rice yield of commercial urea
10.4%, utilization rate of nitrogen fertilizer improves 7.7 percentage points.
It can be seen that can promote urea conversion after alginic acid synergistic carrier prepared by the present invention is in conjunction with urea, to improve
The urea utilization rate of nitrogen fertilizer of acid soil provides new approaches.
Claims (10)
1. a kind of urea suitable for acid soil alginic acid synergistic carrier preparation method, it is characterised in that the step of the preparation method
It is rapid as follows:
A, prepared by alginic acid organic extractant
By 2~5 parts by weight potassium salicylates and 1~3 parts by weight dimethylformamide be added to 100~200 parts by weight temperature be 60~
In 70 DEG C of water, stirring and dissolving is cooling, obtains the alginic acid organic extractant；
B, prepared by alginic acid extracting solution
100 parts by weight seawood meals are added to 800~1500 parts by weight in the alginic acid organic extractant that step A is obtained, so
Its temperature is gradually increased to 70~90 DEG C under stiring afterwards, and keeps 6~12h at this temperature, is then cooled to room temperature, from
Heart separation, sediment discard, and obtain the alginic acid extracting solution
C, prepared by alginic acid synergistic carrier
It is that the nitric acid that 2% peroxophosphoric acid and concentration are by weight 2% by weight is mixed according to weight ratio 1:1 by concentration, obtains
To a kind of nitration mixture；The nitration mixture is added slowly in the alginic acid extracting solution that step B is obtained, the pH value of its extracting solution is adjusted to
3~5,60~80 DEG C of temperature are then heated to, under stiring, is slowly added to 5 weight into 1000 parts by weight alginic acid extracting solutions
Part benzoyl peroxide, then reacts 120min, adds 10 parts by weight uronic acids, 10 parts by weight oligosaccharide and 10 parts by weight sugar
Alcohol continues to be stirred to react 60min, adds 10~20 parts by weight of polyoxyethylene ethers and 2~5 parts by weight O-phthalic dialkylaminobenzoic acid acyls
Amine, it is cooling, its pH value is adjusted to 7.5~9.0 using potassium pyrophosphate aqueous solution, obtains the urea suitable for acid soil
With alginic acid synergistic carrier.
2. alginic acid synergistic carrier preparation method according to claim 1, it is characterised in that in step, potassium salicylate,
The weight ratio of dimethylformamide and water is 2.6~4.5:1.5~2.5:120~180.
3. alginic acid synergistic carrier preparation method according to claim 1, it is characterised in that in step, will be in revolving speed
The solution that stirring and dissolving obtains under conditions of 60~180rpm is cooled to 40 DEG C of temperature or less.
4. alginic acid synergistic carrier preparation method according to claim 1, it is characterised in that in stepb, the sea
Algae is brown alga, bulk kelp or yellow tang；The granularity of the seawood meal is less than 2mm.
5. alginic acid synergistic carrier preparation method according to claim 1, it is characterised in that in stepb, in revolving speed
10~40min is centrifugated under conditions of 1000~5000rpm.
6. alginic acid synergistic carrier preparation method according to claim 1, it is characterised in that in stepb, the sugar
Aldehydic acid is glucuronic acid or galacturonic acid.
7. alginic acid synergistic carrier preparation method according to claim 1, it is characterised in that in step C, described is low
Glycan is malto-oligosaccharide or soyabean oligosaccharides.
8. alginic acid synergistic carrier preparation method according to claim 1, it is characterised in that in step C, the sugar
Alcohol is D-sorbite, maltitol or xylitol.
9. alginic acid synergistic carrier preparation method according to claim 1, it is characterised in that in step C, polyoxy is added
Its solution is cooled to 10~35 DEG C of temperature after vinethene and O-phthalic alkanol amides.
10. alginic acid synergistic carrier preparation method according to claim 1, it is characterised in that in step C, the coke phosphorus
The concentration of sour aqueous solutions of potassium is 1~5mol/L.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111187367A (en) * | 2020-01-07 | 2020-05-22 | 江苏省农业科学院 | Urea formaldehyde modified sodium alginate copolymer and application thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02204383A (en) * | 1989-02-01 | 1990-08-14 | Nippon Hiryo Kk | Gelatinous fertilizer |
| CN101486619A (en) * | 2009-03-02 | 2009-07-22 | 中国海洋大学生物工程开发有限公司 | Process for preparing seaweed urea |
| CN102515945A (en) * | 2011-12-06 | 2012-06-27 | 中国农业科学院农业资源与农业区划研究所 | Algae-enhanced urea, production method thereof, and purpose thereof |
-
2018
- 2018-11-09 CN CN201811328583.5A patent/CN109336683A/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02204383A (en) * | 1989-02-01 | 1990-08-14 | Nippon Hiryo Kk | Gelatinous fertilizer |
| CN101486619A (en) * | 2009-03-02 | 2009-07-22 | 中国海洋大学生物工程开发有限公司 | Process for preparing seaweed urea |
| CN102515945A (en) * | 2011-12-06 | 2012-06-27 | 中国农业科学院农业资源与农业区划研究所 | Algae-enhanced urea, production method thereof, and purpose thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111187367A (en) * | 2020-01-07 | 2020-05-22 | 江苏省农业科学院 | Urea formaldehyde modified sodium alginate copolymer and application thereof |
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