CN104744165B - A kind of alginic acid envelope composite fertilizer with urease inhibiting effect and preparation method thereof - Google Patents

A kind of alginic acid envelope composite fertilizer with urease inhibiting effect and preparation method thereof Download PDF

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CN104744165B
CN104744165B CN201510133389.1A CN201510133389A CN104744165B CN 104744165 B CN104744165 B CN 104744165B CN 201510133389 A CN201510133389 A CN 201510133389A CN 104744165 B CN104744165 B CN 104744165B
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acid
fertilizer
weight
inhibiting effect
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CN104744165A (en
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张守福
李伟
李岳
于金虎
朱新彬
李燕
赵永厚
贾永超
张玉梅
袁亮
李燕婷
林继山
葛军勇
刘义国
展曼曼
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SHANDONG ENBAO BIOTECHNOLOGY Co Ltd
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    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
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    • Y02W30/40Bio-organic fraction processing; Production of fertilisers from the organic fraction of waste or refuse

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Abstract

The invention discloses a kind of alginic acid envelope composite fertilizer with urease inhibiting effect and preparation method thereof, it is characterised in that feed components form as follows according to parts by weight:24 parts 40 50 parts of ammonium nitrate, 26 28 parts of Diammonium phosphate (DAP), 22 24 parts of potassium sulfate, 15 18 parts of enzyme preparation filter residue, 57 parts of amino acid synergistic agent, 32 35 parts of sulfuric acid, 16 18 parts of liquefied ammonia, 35 parts of humic acid, 68 parts of Algae synergistic agent, coating of additive.N P and K organic element is rich in fertilizer produced by the present invention, the addition of enzyme preparation filter residue can effectively prevent the generation of soil-borne disease, so as to promote fertilizer efficiency to play, the addition of amino acid synergistic agent can reduce harm of the ammonia to crop, improve plant recovery of nutrient, the trace element of soil can be supplemented with the synergy of chelated microelements, being sprayed on the film formed on urea after Algae synergistic agent and coating additive mixing has urease inhibiting effect and slow releasing function, volume increase can be promoted, and energy natural degradation, the feature of environmental protection are excellent.

Description

A kind of alginic acid envelope composite fertilizer with urease inhibiting effect and preparation method thereof
Technical field
The invention belongs to composite heat transfer technical field, and in particular to a kind of alginic acid envelope with urease inhibiting effect Composite fertilizer and preparation method thereof.
Background technology
The development experience of China's chemical fertilizer by sulphur ammonium, carbon ammonium to high concentration urea, the developing stage of forth generation nitrogenous fertilizer, Phosphate fertilizer is by ground phosphate rock to calcium superphosphate (or calcium magnesium phosphate) developing deeply to phosphorus compound fertilizer, and the administration of potash fertilizer is by experiment and demonstration to big face Product popularization and application experienced nearly 20 years, initially plant ash, low concentration potassium chloride, phosphorus compound fertilizer again from low concentration, single variety to The development of high concentration diversification, nutrient form are also constantly changing, and new-type fertilizer is constantly filled with.Fertilizer synergist, concise contains Justice is exactly to improve a kind of product of chemical fertilizer utilization ratio.Refer to improve fertilizer efficiency, reduce fixation, volatilization, leaching loss, runoff, improve fertilizer efficiency Effect and nutrient contribution rate, beneficial to sorption enhanced, extend fertilizer efficiency period, improvement or rehabilitating soil, adjust fertilizer provision from soil fertilizer-preserving ability, Improve a kind of fertilizer auxiliary product of crop quality.
As is well known, the volume increase of grain relies primarily on the use of chemical fertilizer for many years, but China's chemical fertilizer application is deposited all the time Dose is big, nutrient loss is too fast, crop absorption rate is not high the features such as, and the environmental pollution that brings of excessive fertilization and The problems such as wasting of resources, therefore study, using fertilizer synergistic agent, chemical fertilizer utilization ratio is improved, to China's grain security, environmental protection Etc. significant.At present, the fertilizer synergist product of most domestic uses inorganic raw material or artificial synthesized macromolecule Material produces, exist cost is high, effect is poor, it is toxic, influence the deficiencies of fertilizer nutrient content.
In order to effectively improve fertilizer nitrogen use efficiency and reduce the environmental pollution of nitrogen, people rest subpackage using certain material and risen Come, then the method for being discharged nutrient by certain characteristic of this packing material.This fertilizer includes coated fertilizer again With coating type fertilizer.Coating type fertilizer relies on penetrable coating layer, by friction, is released after chemistry or this coating of biological agent opening Put dissolved fertilizer.The fertilizer that also many organic matter coatings form, such as alkyd based resin coated fertilizer, polyamine resin bag Film fertilizer, thermohardening resin coated fertilizer etc..The factor of this kind of fertilizer release or more is influenceed, in different soil environments Under, significant change may occur for the release mode of fertilizer, it is difficult to reach satisfied controlled-release effect, be this problem of most critical A little coated fertilizers are difficult to be decomposed and stay in and pollution is formed in soil.
The content of the invention
For problems of the prior art, it is an object of the invention to provide a kind of sea with urease inhibiting effect Alginic acid coated compound fertilizer and preparation method thereof, the amino acid synergistic agent of extraction and N P and K mixed slurry are mixed to prepare compound Fertilizer, it is granulated by comminutor, the Algae synergistic agent of extraction and coating additive is mixed and be sprayed on fertilizer surface, obtained coating Chemical Mixed Fertilizer has urease inhibiting effect and slow releasing function, and energy natural degradation, does not form harm to soil, crop, environment.
The technical scheme that the present invention takes is:
A kind of alginic acid envelope composite fertilizer with urease inhibiting effect, it is characterised in that feed components are according to weight Part composition is as follows:
Ammonium nitrate 40-50 parts, Diammonium phosphate (DAP) 26-28 parts, potassium sulfate 22-24 parts, enzyme preparation filter residue 15-18 parts, amino acid Synergist 5-7 parts, sulfuric acid 32-35 parts, liquefied ammonia 16-18 parts, humic acid 3-5 parts, Algae synergistic agent 6-8 parts, coating additive 2-4 Part.
Further, each component is as follows according to parts by weight composition in the coating additive:It is brassinosteroid 4-6 parts, red Mycin 3-5 parts, heteroauxin 2-4 parts, melissyl alcohol 3-5 parts, chitosan oligosaccharide 8-12 parts, methylcellulose 2-3 parts.
Further, the enzyme preparation filter residue be residue after separating enzyme through 110 DEG C of high-temperature sterilizations, and crude protein contains Amount >=30%, the content of organic matter >=50%, content of mineral substances >=10%, fineness are the granulated slag of 60-70 mesh.
Further, 5-6% organic acid promoter is added in the enzyme preparation filter residue, prepared by the organic acid promoter Process is:According to weight than 2:3:2 take amino-oligosaccharide, chitosan, then add the acetate buffer solution containing 40% sodium acetate, It is dissolved in the fulvic acid of 2 times of volumes, control pressure 1.8MPa, keeps 8-12min, be warming up to 65 DEG C, acidolysis 3h is obtained Mixed liquor.
A kind of preparation method of the alginic acid envelope composite fertilizer with urease inhibiting effect, it is characterised in that specifically include Following steps:
(1) amino acid polymeric solution processed:In enamel reaction still, according to weight than 10:(5-6) fetches water and glutamic acid mixes Close, stir, 2-3% bio protease is added into mixture, rise temperature is to 68-78 DEG C, polymerisation 10-12h;
(2) amino acid synergistic agent processed:The 2-4% micro member of Chelating state is added into amino acid polymeric solution obtained above Element, it is mixed evenly, is put into concentration tank, under 65-70 DEG C of environment, is concentrated into the 25-35% of liquid volume;
(3) fermentation of seaweed liquid processed:It is 20-30% to select wild kelp clothes to water content, and 60- is crushed to by pulverizer 80 mesh, 0.5-0.7% mixed bacteria, seawood meal and water are added according to weight ratio 2:1 mixing, stirs, controls the temperature to be 68-72 DEG C, ferment 5-7 days;
(4) Algae synergistic agent processed:Into the material after fermentation ends, the water of 2.5-3 times of volume is added, is stirred, used Alkaline carbonic acid sodium adjusts pH between 7.5-8.5, and solution is that 9-11h is extracted in 55-62 DEG C of stirring by automatic steam control temperature, is passed through Filter press carries out press filtration, and it is 6.5-7.5 that obtained filtrate adjusts pH with dilute sulfuric acid, is concentrated by evaporation to the 20% of liquor capacity;
(5) nitration mixture reacts slurry processed:Ammonium nitrate, Diammonium phosphate (DAP), potassium sulfate and enzyme preparation filter residue is taken to mix according to weight proportion Conjunction obtains batch mixing, and it is 130-150 mesh to be put into pulverizer and be crushed to grain fineness, takes sulfuric acid and liquefied ammonia to be placed according to weight proportion In tubular reactor, reaction pressure 0.35-0.45MPa, hybrid reaction 5-10s, and batch mixing is controlled to be well mixed;
(6) it is granulated:Obtained slurry in step (5) is added in 100 DEG C of granulation tower, amino is added according to weight proportion Sour synergist, humic acid and Algae synergistic liquid, obtained eutectic is sprayed by the rotary nozzle on granulation tower top, in granulation tower Bottom sieve gets size 1.5mm-3.75mm fertiliser granulates;
(7) coating is handled:Algae synergistic agent and coating additive mixing are taken according to weight proportion, adds 3-5% brown alga The polyethylene glycol of glue and 4-6%, it is uniformly dissolved at 45-55 DEG C, fertiliser granulates table is sprayed on according to fertilizer 5-6% quantity for spray Face, it is 180-200 DEG C of wink-dry to control hot blast temperature;
(8) anti-caking is handled:According to the addition of 1.5kg-2.5kg/ tons, anti-caking is added into the fertilizer on fluid bed Agent, stir, screening obtains size 2.5mm-4.75mm fertiliser granulates.
Further, the bio protease in the step (1) is papain and subtilopeptidase A according to weight Measure ratio 2:The mixture of 3 compositions.
Further, the chelated microelements in the step (2) are EDTA chelated zincs, EDTA chelated magnesiums, EDTA chelas Close boron, EDTA chelates calcium according to weight than 2:3:2:The mixture of 5 compositions.
Further, the mixed bacteria in the step (3) be bacillus subtilis bacterium powder, jelly bacillus bacterium powder, Aspergillus niger bacterium powder is according to weight than 2:1:1 composition is no less than 2.0 × 10 containing effective gemma number11Cfu bacterium powder.
Further, the concentration Algae synergistic agent is that obtained Algae synergistic liquid in step (4) is concentrated by evaporation to molten The 30-40% of liquid product.
Beneficial effects of the present invention are:
N P and K organic element is rich in fertilizer produced by the present invention, enzyme preparation filter residue is rich in microbial mycelial, plant Albumen, amino acid, vitamin, trace element, the bacteriostatic activity of mycelia residuum have good inhibiting effect to crop pathogenses, had The generation of effect prevention soil-borne disease, so as to promote fertilizer efficiency to play, significant effect.
The present invention is to take the technologies such as solid state fermentation, high molecular polymerization, normal temperature chelating by primary raw material of natural glutamate, The effectively extraction synergistic activity factor obtains amino acid synergistic agent, and vital work is played in the growth and development process of plant Can form amide glutaminate in plant with, glutamic acid, storage nitrogen and can eliminate because ammonia density it is too high caused by poison Effect, harm of the ammonia to crop is reduced, improves plant recovery of nutrient, and the synergy of chelated microelements can supplement soil Trace element, improve crops quality.
The Algae synergistic liquid that the present invention extracts from marine alga has degradability for organic principle, and spy is used in extraction process Different bacteria fermentation, weak base regulation and temperature are kept, and improve synergistic factor level, plant source is rich in obtained Algae synergistic liquid Natural regulation synergistic component, including the 0.003-0.006% basic element of cell division, 0.002-0.007% auxin, 0.001- 0.005% cytokinin, 0.003-0.008% mannitol, 0.02-0.06% algal polysaccharides, 0.001-0.005% Amino acid, 0.002-0.007% natural urease inhibitor, can promote crop absorb nutrient, to be effectively increased fertilizer Utilization rate, improve the yield and quality of crop.
The Algae synergistic liquid of the present invention is divided into two parts, and a part is applied in fertilizer making, and another part and coating add Add agent to be sprayed on the film formed on urea after mixing, there is urease inhibiting effect and slow releasing function, inhibition rate of urease up to 25% with On, the utilization rate of urea is effectively improved, 3-4 times slower than common fertilizer of the dissolution velocity in water, coating additive is to plant life With stimulation, volume increase, the natural degradation after crop nutritional utilization end cycle, not to soil, crop, environment shape can be promoted Into harm.
Organic acid promoter is added in the enzyme preparation filter residue of the present invention, the preparation method of organic acid promoter is advantageous to improve The activity of chitosan, the stability of chitosan liquid is added, plant cell is absorbed the combination permeability of the compositions such as amino acid and increase By force, the composition such as its amino-oligosaccharide being rich in, chitosan, plant can be improved to self early harmful resist ability of disease, promote crop Well developed root system, pesticide dosage is greatly lowered, Environmental Safety.
Brief description of the drawings
Fig. 1 arranges schematic diagram for field test in the present invention.
Fig. 2 is earth pillar schematic diagram in the present invention.
Embodiment
Embodiment 1
A kind of alginic acid envelope composite fertilizer with urease inhibiting effect, it is characterised in that feed components are according to weight Part composition is as follows:
40 parts of ammonium nitrate, 26 parts of Diammonium phosphate (DAP), 22 parts of potassium sulfate, 15 parts of enzyme preparation filter residue, 5 parts of amino acid synergistic agent, sulphur 2 parts 32 parts of acid, 16 parts of liquefied ammonia, 3 parts of humic acid, 6 parts of Algae synergistic agent, coating of additive.
Further, each component is as follows according to parts by weight composition in the coating additive:It is 4 parts of brassinosteroid, red mould 3 parts of element, 2 parts of heteroauxin, 3 parts of melissyl alcohol, 8 parts of chitosan oligosaccharide, 2 parts of methylcellulose.
Further, the enzyme preparation filter residue be residue after separating enzyme through 110 DEG C of high-temperature sterilizations, and crude protein contains Amount >=30%, the content of organic matter >=50%, content of mineral substances >=10%, fineness are the granulated slag of 60 mesh.
Further, 5-6% organic acid promoter is added in the enzyme preparation filter residue, prepared by the organic acid promoter Process is:According to weight than 2:3:2 take amino-oligosaccharide, chitosan, then add the acetate buffer solution containing 40% sodium acetate, It is dissolved in the fulvic acid of 2 times of volumes, control pressure 1.8MPa, keeps 8-12min, be warming up to 65 DEG C, acidolysis 3h is obtained Mixed liquor.
A kind of preparation method of the alginic acid envelope composite fertilizer with urease inhibiting effect, it is characterised in that specifically include Following steps:
(1) amino acid polymeric solution processed:In enamel reaction still, according to weight than 10:5 water intakings and glutamic acid mixing, are stirred Mix uniformly, into mixture add 2% by papain and subtilopeptidase A according to weight ratio 2:The biology of 3 compositions Protease, rise temperature is to 68 DEG C, polymerisation 12h;
(2) amino acid synergistic agent processed:Into amino acid polymeric solution obtained above addition 2% by EDTA chelated zincs, EDTA chelated magnesiums, EDTA chelatings boron, EDTA chelate calcium according to weight than 2:3:2:The chelated microelements of 5 compositions, mixing are stirred Mix uniformly, be put into concentration tank, under 65 DEG C of environment, be concentrated into the 25-35% of liquid volume;
(3) fermentation of seaweed liquid processed:It is 20-30% to select wild kelp clothes to water content, and 60 are crushed to by pulverizer Mesh, addition 0.5% is by bacillus subtilis bacterium powder, jelly bacillus bacterium powder, aspergillus niger bacterium powder according to weight than 2:1:1 composition Mixed bacteria, seawood meal and water are according to weight ratio 2:1 mixing, stirs, and it is 68 DEG C to control temperature, is fermented 7 days;
(4) Algae synergistic agent processed:Into the material after fermentation ends, the water of 2.5 times of volumes is added, stirs, uses alkali Property sodium carbonate adjust pH for 7.5-8.5 between, solution by automatic steam control temperature be 55 DEG C stirring extraction 11h, pass through filter press Press filtration is carried out, it is 6.5-7.5 that obtained filtrate adjusts pH with dilute sulfuric acid, is concentrated by evaporation to the 20% of liquor capacity;
(5) nitration mixture reacts slurry processed:Ammonium nitrate, Diammonium phosphate (DAP), potassium sulfate and enzyme preparation filter residue is taken to mix according to weight proportion Conjunction obtains batch mixing, and it is 130 mesh to be put into pulverizer and be crushed to grain fineness, takes sulfuric acid and liquefied ammonia to be placed in tubular type according to weight proportion In reactor, reaction pressure 0.35MPa, hybrid reaction 10s, and batch mixing is controlled to be well mixed;
(6) it is granulated:Obtained slurry in step (5) is added in 100 DEG C of granulation tower, amino is added according to weight proportion Sour synergist, humic acid and Algae synergistic liquid, obtained eutectic is sprayed by the rotary nozzle on granulation tower top, in granulation tower Bottom sieve gets size 1.5mm-3.75mm fertiliser granulates;
(7) coating is handled:Obtained Algae synergistic liquid in step (4) is concentrated by evaporation to the 30-40% of liquor capacity and obtained To concentration Algae synergistic agent, according to weight proportion take Algae synergistic agent and coating additive mixing, add 3% algin and 4% polyethylene glycol, it is uniformly dissolved at 45 DEG C, is sprayed on fertiliser granulates surface according to the quantity for spray of fertilizer 5%, controls hot blast Temperature is 180 DEG C of wink-dries;
(8) anti-caking is handled:According to the addition of 1.5kg/ tons, anticaking agent is added into the fertilizer on fluid bed, is stirred Mix uniformly, screening obtains size 2.5mm-4.75mm fertiliser granulates.
Embodiment 2
A kind of alginic acid envelope composite fertilizer with urease inhibiting effect, it is characterised in that feed components are according to weight Part composition is as follows:
45 parts of ammonium nitrate, 27 parts of Diammonium phosphate (DAP), 23 parts of potassium sulfate, 16 parts of enzyme preparation filter residue, 6 parts of amino acid synergistic agent, sulphur 3 parts 34 parts of acid, 17 parts of liquefied ammonia, 4 parts of humic acid, 7 parts of Algae synergistic agent, coating of additive.
Further, each component is as follows according to parts by weight composition in the coating additive:It is 5 parts of brassinosteroid, red mould 4 parts of element, 3 parts of heteroauxin, 4 parts of melissyl alcohol, 10 parts of chitosan oligosaccharide, 2.5 parts of methylcellulose.
Further, the enzyme preparation filter residue be residue after separating enzyme through 110 DEG C of high-temperature sterilizations, and crude protein contains Amount >=30%, the content of organic matter >=50%, content of mineral substances >=10%, fineness are the granulated slag of 60-70 mesh.
Further, 5-6% organic acid promoter is added in the enzyme preparation filter residue, prepared by the organic acid promoter Process is:According to weight than 2:3:2 take amino-oligosaccharide, chitosan, then add the acetate buffer solution containing 40% sodium acetate, It is dissolved in the fulvic acid of 2 times of volumes, control pressure 1.8MPa, keeps 8-12min, be warming up to 65 DEG C, acidolysis 3h is obtained Mixed liquor.
A kind of preparation method of the alginic acid envelope composite fertilizer with urease inhibiting effect, it is characterised in that specifically include Following steps:
(1) amino acid polymeric solution processed:In enamel reaction still, according to weight than 10:6 water intakings and glutamic acid mixing, are stirred Mix uniformly, into mixture add 2% by papain and subtilopeptidase A according to weight ratio 2:The biology of 3 compositions Protease, rise temperature is to 70 DEG C, polymerisation 11h;
(2) amino acid synergistic agent processed:Into amino acid polymeric solution obtained above addition 3% by EDTA chelated zincs, EDTA chelated magnesiums, EDTA chelatings boron, EDTA chelate calcium according to weight than 2:3:2:The chelated microelements of 5 compositions, mixing are stirred Mix uniformly, be put into concentration tank, under 68 DEG C of environment, be concentrated into the 25-35% of liquid volume;
(3) fermentation of seaweed liquid processed:It is 20-30% to select wild kelp clothes to water content, and 70 are crushed to by pulverizer Mesh, addition 0.6% is by bacillus subtilis bacterium powder, jelly bacillus bacterium powder, aspergillus niger bacterium powder according to weight than 2:1:1 composition Mixed bacteria, seawood meal and water are according to weight ratio 2:1 mixing, stirs, and it is 70 DEG C to control temperature, is fermented 6 days;
(4) Algae synergistic agent processed:Into the material after fermentation ends, the water of 2.8 times of volumes is added, stirs, uses alkali Property sodium carbonate adjust pH for 7.5-8.5 between, solution by automatic steam control temperature be 60 DEG C stirring extraction 10h, pass through filter press Press filtration is carried out, it is 6.5-7.5 that obtained filtrate adjusts pH with dilute sulfuric acid, is concentrated by evaporation to the 20% of liquor capacity;
(5) nitration mixture reacts slurry processed:Ammonium nitrate, Diammonium phosphate (DAP), potassium sulfate and enzyme preparation filter residue is taken to mix according to weight proportion Conjunction obtains batch mixing, and it is 140 mesh to be put into pulverizer and be crushed to grain fineness, takes sulfuric acid and liquefied ammonia to be placed in tubular type according to weight proportion In reactor, reaction pressure 0.4MPa, hybrid reaction 8s, and batch mixing is controlled to be well mixed;
(6) it is granulated:Obtained slurry in step (5) is added in 100 DEG C of granulation tower, amino is added according to weight proportion Sour synergist, humic acid and Algae synergistic liquid, obtained eutectic is sprayed by the rotary nozzle on granulation tower top, in granulation tower Bottom sieve gets size 1.5mm-3.75mm fertiliser granulates;
(7) coating is handled:Obtained Algae synergistic liquid in step (4) is concentrated by evaporation to the 30-40% of liquor capacity and obtained To concentration Algae synergistic agent, according to weight proportion take Algae synergistic agent and coating additive mixing, add 4% algin and 5% polyethylene glycol, it is uniformly dissolved at 50 DEG C, is sprayed on fertiliser granulates surface according to the quantity for spray of fertilizer 6%, controls hot blast Temperature is 200 DEG C of wink-dries;
(8) anti-caking is handled:According to the addition of 2kg/ tons, anticaking agent is added into the fertilizer on fluid bed, is stirred Uniformly, screening obtains size 2.5mm-4.75mm fertiliser granulates.
Embodiment 3
A kind of alginic acid envelope composite fertilizer with urease inhibiting effect, it is characterised in that feed components are according to weight Part composition is as follows:
50 parts of ammonium nitrate, 28 parts of Diammonium phosphate (DAP), 24 parts of potassium sulfate, 18 parts of enzyme preparation filter residue, 7 parts of amino acid synergistic agent, sulphur 4 parts 35 parts of acid, 18 parts of liquefied ammonia, 5 parts of humic acid, 8 parts of Algae synergistic agent, coating of additive.
Further, each component is as follows according to parts by weight composition in the coating additive:It is 6 parts of brassinosteroid, red mould 5 parts of element, 4 parts of heteroauxin, 5 parts of melissyl alcohol, 12 parts of chitosan oligosaccharide, 3 parts of methylcellulose.
Further, the enzyme preparation filter residue be residue after separating enzyme through 110 DEG C of high-temperature sterilizations, and crude protein contains Amount >=30%, the content of organic matter >=50%, content of mineral substances >=10%, fineness are the granulated slag of 70 mesh.
Further, 5-6% organic acid promoter is added in the enzyme preparation filter residue, prepared by the organic acid promoter Process is:According to weight than 2:3:2 take amino-oligosaccharide, chitosan, then add the acetate buffer solution containing 40% sodium acetate, It is dissolved in the fulvic acid of 2 times of volumes, control pressure 1.8MPa, keeps 8-12min, be warming up to 65 DEG C, acidolysis 3h is obtained Mixed liquor.
A kind of preparation method of the alginic acid envelope composite fertilizer with urease inhibiting effect, it is characterised in that specifically include Following steps:
(1) amino acid polymeric solution processed:In enamel reaction still, according to weight than 10:6 water intakings and glutamic acid mixing, are stirred Mix uniformly, into mixture add 3% by papain and subtilopeptidase A according to weight ratio 2:The biology of 3 compositions Protease, rise temperature is to 78 DEG C, polymerisation 10h;
(2) amino acid synergistic agent processed:Into amino acid polymeric solution obtained above addition 4% by EDTA chelated zincs, EDTA chelated magnesiums, EDTA chelatings boron, EDTA chelate calcium according to weight than 2:3:2:The chelated microelements of 5 compositions, mixing are stirred Mix uniformly, be put into concentration tank, under 70 DEG C of environment, be concentrated into the 25-35% of liquid volume;
(3) fermentation of seaweed liquid processed:It is 20-30% to select wild kelp clothes to water content, and 80 are crushed to by pulverizer Mesh, addition 0.7% is by bacillus subtilis bacterium powder, jelly bacillus bacterium powder, aspergillus niger bacterium powder according to weight than 2:1:1 composition Mixed bacteria, seawood meal and water are according to weight ratio 2:1 mixing, stirs, and it is 72 DEG C to control temperature, is fermented 5 days;
(4) Algae synergistic agent processed:Into the material after fermentation ends, the water of 3 times of volumes is added, is stirred, with alkalescence Sodium carbonate adjusts pH between 7.5-8.5, and solution is that 9h is extracted in 62 DEG C of stirrings by automatic steam control temperature, is carried out by filter press Press filtration, it is 6.5-7.5 that obtained filtrate adjusts pH with dilute sulfuric acid, is concentrated by evaporation to the 20% of liquor capacity;
(5) nitration mixture reacts slurry processed:Ammonium nitrate, Diammonium phosphate (DAP), potassium sulfate and enzyme preparation filter residue is taken to mix according to weight proportion Conjunction obtains batch mixing, and it is 150 mesh to be put into pulverizer and be crushed to grain fineness, takes sulfuric acid and liquefied ammonia to be placed in tubular type according to weight proportion In reactor, reaction pressure 0.45MPa, hybrid reaction 5s, and batch mixing is controlled to be well mixed;
(6) it is granulated:Obtained slurry in step (5) is added in 100 DEG C of granulation tower, amino is added according to weight proportion Sour synergist, humic acid and Algae synergistic liquid, obtained eutectic is sprayed by the rotary nozzle on granulation tower top, in granulation tower Bottom sieve gets size 1.5mm-3.75mm fertiliser granulates;
(7) coating is handled:Obtained Algae synergistic liquid in step (4) is concentrated by evaporation to the 30-40% of liquor capacity and obtained To concentration Algae synergistic agent, according to weight proportion take Algae synergistic agent and coating additive mixing, add 5% algin and 6% polyethylene glycol, it is uniformly dissolved at 55 DEG C, is sprayed on fertiliser granulates surface according to the quantity for spray of fertilizer 6%, controls hot blast Temperature is 200 DEG C of wink-dries;
(8) anti-caking is handled:According to the addition of 2.5kg/ tons, anticaking agent is added into the fertilizer on fluid bed, is stirred Mix uniformly, screening obtains size 2.5mm-4.75mm fertiliser granulates.
Fertilizer produced by the present invention is in corn planting using as follows:
1 experimental condition and experimental design
1.1 experimental field basic conditions
Test site is tested and carried out in the solarium of base in Qingdao of Shandong province proving ground.One's respective area belongs to warm temperate zone Semi-moist monsoon climate, parent soil material are the Yellow River alluvial deposits, and soil types is moisture soil, the light earth of topsoil quality, foundation soil fertility Index is organic matter 10.50g/kg, available nitrogen 53.5mg/kg, rapid available phosphorus (P2O5) 14.6mg/kg, available potassium (K2O)70mg/ Kg, belong to medium higher fertile soil, summer corn growing area tool is broadly representative in China.
1.2 experimental designs are with implementing
Fertilizer used in experiment carries out soil by the marine alga coated slow release fertilizer produced in embodiments of the invention 1, embodiment 2 Post experiment in cultivation, set 1. CK1 (full blank control), 2. CK2 (common fertilizer control), 3. U (coated compound fertilizer of embodiment 1), 4. 4 processing of HU (coated compound fertilizer of embodiment 2), 6 repetitions, nitrogen application level are 0.15gN/kg soil, corn variety is Zheng Dan 958, sowed on May 30th, 2010, September harvests on the 12nd, after sample air-dries, determines corn yield and constituent element, nitrogen The indexs such as plain utilization ratio.
Fig. 1 is shown in field test arrangement, and Fig. 2 is shown in earth pillar signal.
2 result of the tests
Influence of the 2.1 marine alga coated slow-release ureas to corn yield
The corn yield of table 1 and constituent element
As can be seen from Table 1, the grain number per spike of coated slow-release composite fertilizer processing is higher by 11 compared with common fertilizer, tassel row number and hundred Weight also increased, so as to add corn yield.Compared with common fertilizer, coated slow-release composite fertilizer has obvious increasing to corn Production acts on, and U is than CK2 volume increase 43.72%.HU is than CK2 volume increase 44.91%.
Influence of the 2.2 marine alga coated slow-release ureas to nitrogen utilization efficiency
The nitrogen utilization efficiency of table 2
As can be seen from Table 2, the nitrogen harvest index of HU processing and the agronomy efficiency of nitrogenous fertilizer are above U processing, and this may It is because marine alga coated slow-release urea promotes photosynthate and nitrogen to be transported into seed, to improving corn kernel protein content Also there is certain effect.Coated slow-release composite fertilizer can significantly improve nitrogen utilization efficiency, and 39.16% is brought up to by 36.32%, more general Logical fertilizer increase by 6.9%.
3. brief summary
Soil-column test result shows that coated slow-release composite fertilizer produced by the invention has the good effect that increases production and improves productivity, its Amount of increase in production is higher by 10.35 percentage points compared with common fertilizer, and utilization rate of nitrogen fertilizer improves 6.8%.
It is limitation of the present invention that described above, which is not, and the present invention is also not limited to the example above, the art The variations, modifications, additions or substitutions that technical staff is made in the essential scope of the present invention, it should also belong to the protection of the present invention Scope.

Claims (5)

1. a kind of alginic acid envelope composite fertilizer with urease inhibiting effect, it is characterised in that feed components are according to parts by weight Composition is as follows:
Ammonium nitrate 40-50 parts, Diammonium phosphate (DAP) 26-28 parts, potassium sulfate 22-24 parts, enzyme preparation filter residue 15-18 parts, amino acid synergistic Agent 5-7 parts, sulfuric acid 32-35 parts, liquefied ammonia 16-18 parts, humic acid 3-5 parts, Algae synergistic liquid 6-8 parts, concentration Algae synergistic agent 2-4 Part, coating additive 2-4 parts;
Each component forms as follows according to parts by weight in the coating additive:Brassinosteroid 4-6 parts, gibberellin 3-5 parts, indoles Acetic acid 2-4 parts, melissyl alcohol 3-5 parts, chitosan oligosaccharide 8-12 parts, methylcellulose 2-3 parts;
5-6% organic acid promoter is added in the enzyme preparation filter residue, the organic acid promoter preparation process is:According to weight Measure ratio 2:3:2 take amino-oligosaccharide, chitosan, then add the acetate buffer solution containing 40% sodium acetate, are dissolved in 2 times of volumes Fulvic acid in, control pressure 1.8MPa, keep 8-12min, be warming up to 65 DEG C, the mixed liquor that acidolysis 3h is obtained;
The preparation method of the above-mentioned alginic acid envelope composite fertilizer with urease inhibiting effect, specifically comprises the following steps:
(1) amino acid polymeric solution processed:In enamel reaction still, according to weight than 10:(5-6) fetches water and glutamic acid mixing, stirs The bio protease that 2-3% is uniformly added into mixture is mixed, rise temperature is to 68-78 DEG C, polymerisation 10-12h;
(2) amino acid synergistic agent processed:2-4% chelated microelements are added into amino acid polymeric solution obtained above, It is mixed evenly, is put into concentration tank, under 65-70 DEG C of environment, is concentrated into the 25-35% of liquid volume;
(3) fermentation of seaweed liquid processed:It is 20-30% to select wild kelp clothes to water content, and 60-80 is crushed to by pulverizer Mesh, adds 0.5-0.7% mixed bacteria, and mixed bacteria is bacillus subtilis bacterium powder, jelly bacillus bacterium powder, aspergillus niger Bacterium powder is according to weight than 2:1:1 composition is no less than 2.0 × 10 containing effective gemma number11Cfu bacterium powder, seawood meal and water are according to weight Measure ratio 2:1 mixing, stirs, and it is 68-72 DEG C to control temperature, is fermented 5-7 days;
(4) Algae synergistic liquid processed:Into the material after fermentation ends, the water of 2.5-3 times of volume is added, is stirred, with alkalescence Sodium carbonate adjusts pH between 7.5-8.5, and solution is that 9-11h is extracted in 55-62 DEG C of stirring by automatic steam control temperature, passes through press filtration Machine carries out press filtration, and it is 6.5-7.5 that obtained filtrate adjusts pH with dilute sulfuric acid;
(5) nitration mixture reacts slurry processed:Ammonium nitrate, Diammonium phosphate (DAP), potassium sulfate and enzyme preparation filter residue is taken to mix according to weight proportion To batch mixing, it is 130-150 mesh to be put into pulverizer and be crushed to grain fineness, takes sulfuric acid and liquefied ammonia to be placed in tubular type according to weight proportion In reactor, reaction pressure 0.35-0.45MPa, hybrid reaction 5-10s, and batch mixing is controlled to be well mixed;
(6) it is granulated:Obtained slurry in step (5) is added in 100 DEG C of granulation tower, increased according to weight proportion addition amino acid Agent, humic acid and Algae synergistic liquid are imitated, obtained eutectic is sprayed by the rotary nozzle on granulation tower top, in granulation tower bottom sieve Get size 1.5mm-3.75mm fertiliser granulates;
(7) coating is handled:Concentration Algae synergistic agent and coating additive mixing are taken according to weight proportion, adds 3-5% brown alga The polyethylene glycol of glue and 4-6%, it is uniformly dissolved at 45-55 DEG C, fertiliser granulates table is sprayed on according to fertilizer 5-6% quantity for spray Face, it is 180-200 DEG C of wink-dry to control hot blast temperature;
(8) anti-caking is handled:According to the addition of 1.5kg-2.5kg/ tons, anticaking agent is added into the fertilizer on fluid bed, Stir, screening obtains size 2.5mm-4.75mm fertiliser granulates.
2. a kind of alginic acid envelope composite fertilizer with urease inhibiting effect according to claim 1, it is characterised in that described Enzyme preparation filter residue be residue after separating enzyme through 110 DEG C of high-temperature sterilizations, and crude protein content >=30%, the content of organic matter >= 50%, content of mineral substances >=10%, fineness is the granulated slag of 60-70 mesh.
3. a kind of alginic acid envelope composite fertilizer with urease inhibiting effect according to claim 1, it is characterised in that described Bio protease in step (1) is papain and subtilopeptidase A according to weight ratio 2:The mixture of 3 compositions.
4. a kind of alginic acid envelope composite fertilizer with urease inhibiting effect according to claim 1, it is characterised in that described Chelated microelements in step (2) are EDTA chelated zincs, EDTA chelated magnesiums, EDTA chelate boron, EDTA chelates calcium according to weight Measure ratio 2:3:2:The mixture of 5 compositions.
5. a kind of alginic acid envelope composite fertilizer with urease inhibiting effect according to claim 1, it is characterised in that described The agent of concentration Algae synergistic is that obtained Algae synergistic liquid in step (4) is concentrated by evaporation to the 30-40% of liquor capacity.
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