CN117229098A - Special fertilizer for corn and preparation method thereof - Google Patents
Special fertilizer for corn and preparation method thereof Download PDFInfo
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- CN117229098A CN117229098A CN202311216682.5A CN202311216682A CN117229098A CN 117229098 A CN117229098 A CN 117229098A CN 202311216682 A CN202311216682 A CN 202311216682A CN 117229098 A CN117229098 A CN 117229098A
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- 239000003337 fertilizer Substances 0.000 title claims abstract description 75
- 240000008042 Zea mays Species 0.000 title claims abstract description 58
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 title claims abstract description 58
- 235000002017 Zea mays subsp mays Nutrition 0.000 title claims abstract description 58
- 235000005822 corn Nutrition 0.000 title claims abstract description 58
- 238000002360 preparation method Methods 0.000 title claims abstract description 9
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims abstract description 57
- 239000004202 carbamide Substances 0.000 claims abstract description 57
- 239000003112 inhibitor Substances 0.000 claims abstract description 45
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 claims abstract description 22
- 238000013270 controlled release Methods 0.000 claims abstract description 17
- 229920000642 polymer Polymers 0.000 claims abstract description 13
- LFVGISIMTYGQHF-UHFFFAOYSA-N ammonium dihydrogen phosphate Chemical compound [NH4+].OP(O)([O-])=O LFVGISIMTYGQHF-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229910000387 ammonium dihydrogen phosphate Inorganic materials 0.000 claims abstract description 11
- 239000006012 monoammonium phosphate Substances 0.000 claims abstract description 11
- 235000019837 monoammonium phosphate Nutrition 0.000 claims abstract description 11
- 229910000402 monopotassium phosphate Inorganic materials 0.000 claims abstract description 11
- 235000019796 monopotassium phosphate Nutrition 0.000 claims abstract description 11
- 239000001103 potassium chloride Substances 0.000 claims abstract description 11
- 235000011164 potassium chloride Nutrition 0.000 claims abstract description 11
- GNSKLFRGEWLPPA-UHFFFAOYSA-M potassium dihydrogen phosphate Chemical compound [K+].OP(O)([O-])=O GNSKLFRGEWLPPA-UHFFFAOYSA-M 0.000 claims abstract description 11
- LWIHDJKSTIGBAC-UHFFFAOYSA-K potassium phosphate Substances [K+].[K+].[K+].[O-]P([O-])([O-])=O LWIHDJKSTIGBAC-UHFFFAOYSA-K 0.000 claims abstract description 11
- 239000011573 trace mineral Substances 0.000 claims abstract description 10
- 235000013619 trace mineral Nutrition 0.000 claims abstract description 10
- 239000002994 raw material Substances 0.000 claims abstract description 9
- QJZYHAIUNVAGQP-UHFFFAOYSA-N 3-nitrobicyclo[2.2.1]hept-5-ene-2,3-dicarboxylic acid Chemical compound C1C2C=CC1C(C(=O)O)C2(C(O)=O)[N+]([O-])=O QJZYHAIUNVAGQP-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000004021 humic acid Substances 0.000 claims abstract description 8
- 239000000945 filler Substances 0.000 claims abstract description 7
- 238000004519 manufacturing process Methods 0.000 claims abstract description 5
- 238000002156 mixing Methods 0.000 claims description 35
- 238000002844 melting Methods 0.000 claims description 12
- 230000008018 melting Effects 0.000 claims description 12
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 10
- 238000005507 spraying Methods 0.000 claims description 10
- PUKLDDOGISCFCP-JSQCKWNTSA-N 21-Deoxycortisone Chemical compound C1CC2=CC(=O)CC[C@]2(C)[C@@H]2[C@@H]1[C@@H]1CC[C@@](C(=O)C)(O)[C@@]1(C)CC2=O PUKLDDOGISCFCP-JSQCKWNTSA-N 0.000 claims description 8
- LXKCHCXZBPLTAE-UHFFFAOYSA-N 3,4-dimethyl-1H-pyrazole phosphate Chemical compound OP(O)(O)=O.CC1=CNN=C1C LXKCHCXZBPLTAE-UHFFFAOYSA-N 0.000 claims description 8
- FCYKAQOGGFGCMD-UHFFFAOYSA-N Fulvic acid Natural products O1C2=CC(O)=C(O)C(C(O)=O)=C2C(=O)C2=C1CC(C)(O)OC2 FCYKAQOGGFGCMD-UHFFFAOYSA-N 0.000 claims description 8
- APUPEJJSWDHEBO-UHFFFAOYSA-P ammonium molybdate Chemical compound [NH4+].[NH4+].[O-][Mo]([O-])(=O)=O APUPEJJSWDHEBO-UHFFFAOYSA-P 0.000 claims description 8
- 235000018660 ammonium molybdate Nutrition 0.000 claims description 8
- 239000011609 ammonium molybdate Substances 0.000 claims description 8
- 229940010552 ammonium molybdate Drugs 0.000 claims description 8
- 229960000892 attapulgite Drugs 0.000 claims description 8
- 239000004227 calcium gluconate Substances 0.000 claims description 8
- 229960004494 calcium gluconate Drugs 0.000 claims description 8
- 235000013927 calcium gluconate Nutrition 0.000 claims description 8
- NEEHYRZPVYRGPP-UHFFFAOYSA-L calcium;2,3,4,5,6-pentahydroxyhexanoate Chemical compound [Ca+2].OCC(O)C(O)C(O)C(O)C([O-])=O.OCC(O)C(O)C(O)C(O)C([O-])=O NEEHYRZPVYRGPP-UHFFFAOYSA-L 0.000 claims description 8
- 230000005496 eutectics Effects 0.000 claims description 8
- 239000002509 fulvic acid Substances 0.000 claims description 8
- 229940095100 fulvic acid Drugs 0.000 claims description 8
- 229910052625 palygorskite Inorganic materials 0.000 claims description 8
- LEZAYTDLNNEFJT-UHFFFAOYSA-N tetracosasodium octaborate tetrahydrate Chemical compound O.O.O.O.[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[O-]B([O-])[O-].[O-]B([O-])[O-].[O-]B([O-])[O-].[O-]B([O-])[O-].[O-]B([O-])[O-].[O-]B([O-])[O-].[O-]B([O-])[O-].[O-]B([O-])[O-] LEZAYTDLNNEFJT-UHFFFAOYSA-N 0.000 claims description 8
- 229910052757 nitrogen Inorganic materials 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 4
- 238000012216 screening Methods 0.000 claims description 4
- 239000002002 slurry Substances 0.000 claims description 4
- 230000008569 process Effects 0.000 claims description 3
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 2
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 2
- 229910052796 boron Inorganic materials 0.000 claims description 2
- 229960005069 calcium Drugs 0.000 claims description 2
- 239000011575 calcium Substances 0.000 claims description 2
- 229910052791 calcium Inorganic materials 0.000 claims description 2
- 238000013329 compounding Methods 0.000 claims description 2
- 238000005469 granulation Methods 0.000 claims description 2
- 230000003179 granulation Effects 0.000 claims description 2
- 239000002609 medium Substances 0.000 claims description 2
- 239000011733 molybdenum Substances 0.000 claims description 2
- 229910052750 molybdenum Inorganic materials 0.000 claims description 2
- 239000004814 polyurethane Substances 0.000 claims description 2
- 229920002635 polyurethane Polymers 0.000 claims description 2
- 239000002689 soil Substances 0.000 abstract description 9
- 235000015097 nutrients Nutrition 0.000 abstract description 7
- 239000000463 material Substances 0.000 description 13
- 238000010438 heat treatment Methods 0.000 description 11
- 230000000052 comparative effect Effects 0.000 description 6
- 238000007873 sieving Methods 0.000 description 6
- 150000001875 compounds Chemical class 0.000 description 5
- 238000003756 stirring Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 238000011282 treatment Methods 0.000 description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 2
- 230000004720 fertilization Effects 0.000 description 2
- 239000011574 phosphorus Substances 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 239000011591 potassium Substances 0.000 description 2
- 229910052700 potassium Inorganic materials 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 240000002234 Allium sativum Species 0.000 description 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical group N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 1
- 241001057636 Dracaena deremensis Species 0.000 description 1
- 241000238631 Hexapoda Species 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- 206010067482 No adverse event Diseases 0.000 description 1
- 241000607479 Yersinia pestis Species 0.000 description 1
- 238000005904 alkaline hydrolysis reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009395 breeding Methods 0.000 description 1
- 230000001488 breeding effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000035558 fertility Effects 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 235000004611 garlic Nutrition 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 235000021049 nutrient content Nutrition 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000009331 sowing Methods 0.000 description 1
- 238000012876 topography Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
- Y02P60/20—Reduction of greenhouse gas [GHG] emissions in agriculture, e.g. CO2
- Y02P60/21—Dinitrogen oxide [N2O], e.g. using aquaponics, hydroponics or efficiency measures
Landscapes
- Fertilizers (AREA)
Abstract
The invention provides a fertilizer special for corn and a preparation method thereof. The special fertilizer for corn is prepared from stable fertilizer containing an inhibitor and precisely compounded polymer coated controlled release urea, wherein the stable fertilizer containing the inhibitor comprises the following raw materials in parts by weight: 60-70 parts of common urea, 20-30 parts of monoammonium phosphate, 30-40 parts of monopotassium phosphate, 10-20 parts of potassium chloride, 30-48 parts of medium trace elements, 25-35 parts of humic acid, 1.5-7.5 parts of nitrification inhibitor and 20-40 parts of filler. The special fertilizer for corn has the advantages of long-acting yield increase and high fertilizer utilization rate, can provide necessary nutrient elements for corn growth when being applied to soil, comprehensively and uniformly supply corn nutrients, remarkably improve corn yield, improve corn quality and realize agricultural sustainable production.
Description
Technical Field
The invention relates to the technical field of fertilizers, in particular to a special fertilizer for corn and a preparation method thereof.
Background
Corn is a high-yield grain crop in China, is an important feed source in animal husbandry, breeding industry and the like, is also one of indispensable raw materials in food, medical and health, light industry, chemical industry and the like, and has wide planting area in China. The improvement of the economic yield of the corn is influenced by the reduction of soil fertility and diseases and insect pests, the unscientific fertilization seriously leads to the increase of corn harmful substances, the quality of the corn is reduced, the fertilizer is used in a large amount, the soil is easy to harden, the water and fertilizer retention performance is deteriorated, and the normal growth of the corn is seriously influenced.
The special fertilizer for corn of different types has different properties, and the nutrient content, solubility, pH value, stability, mobility in soil, fertilizer efficiency speed, lasting effect length and the like of the special fertilizer can all influence the utilization rate of the corn fertilizer. Therefore, the special fertilizer for corn provided by the invention has the advantages of long-acting yield increase and high fertilizer utilization rate, can comprehensively and uniformly supply corn nutrients when being applied to soil, and has important significance for realizing agricultural sustainable production.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention aims to provide the special fertilizer for the corn and the preparation method thereof, so as to solve the problems in the prior art.
In order to achieve the above object, the present invention is realized by the following technical scheme: the special fertilizer for corn is prepared from stable fertilizer containing an inhibitor and precisely compounded polymer coated controlled release urea, wherein the polymer coated controlled release urea is polyurethane coated controlled release urea with a controlled release period of 60 days, the mass fraction of nitrogen is 44%, and the stable fertilizer containing the inhibitor comprises the following raw materials in parts by weight: 60-70 parts of common urea, 20-30 parts of monoammonium phosphate, 30-40 parts of monopotassium phosphate, 10-20 parts of potassium chloride, 30-48 parts of medium trace elements, 25-35 parts of humic acid, 1.5-7.5 parts of nitrification inhibitor and 20-40 parts of filler.
Further, the medium trace elements comprise 5-10 parts of calcium, 20-30 parts of boron and 6-8 parts of molybdenum.
Further, the medium trace elements are calcium gluconate, sodium octaborate tetrahydrate and ammonium molybdate.
Further, the humic acid is 25-35 parts of fulvic acid.
Further, the nitrification inhibitor is 1.5-7.5 parts of 3, 4-dimethylpyrazole phosphate; the filler is 20-40 parts of attapulgite.
The preparation method of the fertilizer special for corn comprises the following steps of raw material crushing, mixing and melting, slurry spraying and granulating, cooling and screening, blending and the like, and the specific steps are as follows: step one, crushing urea, and then placing the crushed urea into a urea melting tank to prepare urea melt; adding the nitrification inhibitor into urea melt, and fully and uniformly mixing to obtain mixed melt containing the inhibitor; step three, monoammonium phosphate, monopotassium phosphate, potassium chloride, medium trace elements, humic acid and filler are placed in a mixing tank to obtain mixed melt; step four, adding the mixed melt obtained in the step one into a mixing tank in the step three to be uniformly mixed so as to obtain a eutectic; step five, preparing a stable fertilizer containing an inhibitor; and step six, preparing special corn fertilizers with different precise compounding proportions.
Further, the internal temperature of the melting tank in the first step is raised to 130-140 ℃; .
In the third step, the raw materials in the third step are crushed and heated to 50-60 ℃ in a mixing tank; in the fifth step, a slurry spraying granulation and cooling screening process is adopted.
And step six, the stable fertilizer containing the inhibitor and the polymer coated controlled release urea prepared in step five are put into a stirrer according to different weight portions to be stirred for 6-10min, and are uniformly mixed.
The invention has the beneficial effects that:
1. the special fertilizer for corn has scientific nutrient proportion, and the addition of humic acid and medium trace elements can lead the nutrients of the fertilizer to be more balanced, meet the requirements for the nutrients in the growth process of corn, ensure that the fertilizer is applied once without additional fertilizer, and meet the technical requirement of once fertilization of corn.
2. According to the special fertilizer for corn, the nitrification inhibitor is added, so that volatilization of fertilizer nutrients in a gaseous ammonia form can be effectively reduced, nitrogen loss is reduced, fertilizer application cost is further reduced, and environmental pollution is reduced.
3. The special fertilizer for corn can obviously increase the economic yield of corn, improve the quality of corn, obviously improve the utilization rate of fertilizer, and has safe and environment-friendly raw materials and no toxic effect on corn.
Drawings
FIG. 1 is a schematic structural view of the appearance of a fertilizer special for corn and a preparation method thereof.
Detailed Description
The invention is further described in connection with the following detailed description, in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the invention easy to understand.
Referring to fig. 1, the present invention provides a technical solution: the invention discloses a special fertilizer for corn and a preparation method thereof, wherein test materials used in the embodiment of the invention are all conventional test materials in the field, and can be purchased through commercial channels.
Example 1
(1) Crushing 65 parts by weight of urea, putting the crushed urea into a urea melting tank, and heating to 135 ℃ to obtain urea melt;
(2) Adding 5.5 parts by weight of nitrification inhibitor (3, 4-dimethylpyrazole phosphate) into urea melt, and fully and uniformly mixing to form mixed melt containing the inhibitor;
(3) Crushing 25 parts by weight of monoammonium phosphate, 35 parts by weight of monopotassium phosphate, 15 parts by weight of potassium chloride, 7.5 parts by weight of calcium gluconate, 25 parts by weight of sodium octaborate tetrahydrate, 7 parts by weight of ammonium molybdate, 30 parts by weight of fulvic acid and 30 parts by weight of attapulgite, and then placing the crushed materials in a mixing tank, and heating the crushed materials to 55 ℃ to obtain mixed melt;
(4) Adding the mixed melt obtained in the step (1) into a mixing tank in the step (3) to be uniformly mixed so as to obtain a eutectic;
(5) Granulating by spraying, cooling and sieving to obtain a stable fertilizer containing the inhibitor;
(6) And (3) placing the stable fertilizer containing the inhibitor prepared in the step (5) and the polymer coated controlled release urea into a stirrer for stirring for 8min according to the weight ratio of 6:4, and uniformly mixing to obtain the corn special fertilizer with different precise compound proportions.
Example 2
(1) Crushing 60 parts by weight of urea, and then placing the crushed urea into a urea melting tank, and heating to 130 ℃ to obtain urea melt;
(2) Adding 5.0 parts by weight of nitrification inhibitor (3, 4-dimethylpyrazole phosphate) into urea melt, and fully and uniformly mixing to form mixed melt containing the inhibitor;
(3) Crushing 20 parts by weight of monoammonium phosphate, 30 parts by weight of monopotassium phosphate, 10 parts by weight of potassium chloride, 5 parts by weight of calcium gluconate, 20 parts by weight of sodium octaborate tetrahydrate, 6 parts by weight of ammonium molybdate, 35 parts by weight of fulvic acid and 40 parts by weight of attapulgite, and then placing the crushed materials in a mixing tank, and heating to 50 ℃ to obtain mixed melt;
(4) Adding the mixed melt obtained in the step (1) into a mixing tank in the step (3) to be uniformly mixed so as to obtain a eutectic;
(5) Granulating by spraying, cooling and sieving to obtain a stable fertilizer containing the inhibitor;
(6) And (3) placing the stable fertilizer containing the inhibitor prepared in the step (5) and the polymer coated controlled release urea into a stirrer for stirring for 8min according to the weight ratio of 6:4, and uniformly mixing to obtain the corn special fertilizer with different precise compound proportions.
Example 3
(1) 70 parts by weight of urea is crushed and then put into a urea melting tank, and the temperature is raised to 140 ℃ to obtain urea melt;
(2) Adding 6.0 parts by weight of nitrification inhibitor (3, 4-dimethylpyrazole phosphate) into urea melt, and fully and uniformly mixing to form mixed melt containing the inhibitor;
(3) Crushing 30 parts by weight of monoammonium phosphate, 40 parts by weight of monopotassium phosphate, 20 parts by weight of potassium chloride, 10 parts by weight of calcium gluconate, 30 parts by weight of sodium octaborate tetrahydrate, 8 parts by weight of ammonium molybdate, 25 parts by weight of fulvic acid and 20 parts by weight of attapulgite, and then placing the crushed materials in a mixing tank, and heating to 60 ℃ to obtain mixed melt;
(4) Adding the mixed melt obtained in the step (1) into a mixing tank in the step (3) to be uniformly mixed so as to obtain a eutectic;
(5) Granulating by spraying, cooling and sieving to obtain a stable fertilizer containing the inhibitor;
(6) And (3) placing the stable fertilizer containing the inhibitor prepared in the step (5) and the polymer coated controlled release urea into a stirrer for stirring for 8min according to the weight ratio of 6:4, and uniformly mixing to obtain the corn special fertilizer with different precise compound proportions.
Comparative example 1
(1) Crushing 65 parts by weight of urea, putting the crushed urea into a urea melting tank, and heating to 135 ℃ to obtain urea melt;
(2) Adding 5.5 parts by weight of nitrification inhibitor (3, 4-dimethylpyrazole phosphate) into urea melt, and fully and uniformly mixing to form mixed melt containing the inhibitor;
(3) Crushing 25 parts by weight of monoammonium phosphate, 35 parts by weight of monopotassium phosphate, 15 parts by weight of potassium chloride, 7.5 parts by weight of calcium gluconate, 25 parts by weight of sodium octaborate tetrahydrate, 7 parts by weight of ammonium molybdate, 30 parts by weight of fulvic acid and 30 parts by weight of attapulgite, and then placing the crushed materials in a mixing tank, and heating the crushed materials to 55 ℃ to obtain mixed melt;
(4) Adding the mixed melt obtained in the step (1) into a mixing tank in the step (3) to be uniformly mixed so as to obtain a eutectic;
(5) Granulating by spraying, cooling and sieving to obtain a stable fertilizer containing the inhibitor;
(6) And (3) placing the stable fertilizer containing the inhibitor prepared in the step (5) and the polymer coated controlled release urea into a stirrer for stirring for 6min according to the weight ratio of 4:6, and uniformly mixing to obtain the corn special fertilizer with different precise compound proportions.
Comparative example 2
(1) Crushing 65 parts by weight of urea, putting the crushed urea into a urea melting tank, and heating to 135 ℃ to obtain urea melt;
(2) Adding 5.5 parts by weight of nitrification inhibitor (3, 4-dimethylpyrazole phosphate) into urea melt, and fully and uniformly mixing to form mixed melt containing the inhibitor;
(3) Crushing 25 parts by weight of monoammonium phosphate, 35 parts by weight of monopotassium phosphate, 15 parts by weight of potassium chloride, 7.5 parts by weight of calcium gluconate, 25 parts by weight of sodium octaborate tetrahydrate, 7 parts by weight of ammonium molybdate, 30 parts by weight of fulvic acid and 30 parts by weight of attapulgite, and then placing the crushed materials in a mixing tank, and heating the crushed materials to 55 ℃ to obtain mixed melt;
(4) Adding the mixed melt obtained in the step (1) into a mixing tank in the step (3) to be uniformly mixed so as to obtain a eutectic;
(5) Granulating by spraying, cooling and sieving to obtain a stable fertilizer containing the inhibitor;
(6) And (3) placing the stable fertilizer containing the inhibitor prepared in the step (5) and the polymer coated controlled release urea into a stirrer for stirring for 10min according to the weight ratio of 8:2, and uniformly mixing to obtain the corn special fertilizer with different precise compound proportions.
Comparative example 3
(1) Crushing 65 parts by weight of urea, putting the crushed urea into a urea melting tank, and heating to 135 ℃ to obtain urea melt;
(2) Adding 5.5 parts by weight of nitrification inhibitor (3, 4-dimethylpyrazole phosphate) into urea melt, and fully and uniformly mixing to form mixed melt containing the inhibitor;
(3) Crushing 25 parts by weight of monoammonium phosphate, 35 parts by weight of monopotassium phosphate, 15 parts by weight of potassium chloride, 7.5 parts by weight of calcium gluconate, 25 parts by weight of sodium octaborate tetrahydrate, 7 parts by weight of ammonium molybdate, 30 parts by weight of fulvic acid and 30 parts by weight of attapulgite, and then placing the crushed materials in a mixing tank, and heating the crushed materials to 55 ℃ to obtain mixed melt;
(4) Adding the mixed melt obtained in the step (1) into a mixing tank in the step (3) to be uniformly mixed so as to obtain a eutectic;
(5) And granulating by spraying, cooling and sieving to obtain the stable fertilizer containing the inhibitor.
The corn special fertilizer prepared in examples 1-3 and comparative examples 1-3 was subjected to field trials.
In this example, the test site: the soil type of the test field is Jian Yo wet leaching soil (brown soil) which grows on a fourth loess-like matrix in the corn field in the Shandong province, the texture is sticky and heavy, the topography is flat, the previous crop is garlic, the basic physicochemical property of the soil before sowing is pH 6.95, the organic matter is 18.4g/kg, the alkaline hydrolysis nitrogen is 104mg/kg, the quick-acting phosphorus is 20.2mg/kg, the quick-acting potassium is 128.2mg/kg, the total nitrogen is 1.22g/kg, the total phosphorus is 1.04g/kg and the total potassium is 18.2g/kg.
Test materials: the variety of the corn is Zhengdan 958.
Test treatment: the test is carried out by 6 treatments, each treatment is repeated for 3 times, 18 test cells are total, the length of each cell is 10m, the width of each cell is 5.4m, the test cells are arranged in a completely random block mode, the periphery of each test cell is provided with protection rows, the corn plant spacing is 25cm, and the row spacing is 60cm. The special fertilizers for corn prepared in examples 1-3 and comparative examples 1-3 are applied at one time in each test area, the fertilizing amount is 50 kg/mu, and the field management after corn planting is daily management. The test results are shown in Table 1.
TABLE 1 Effect of different corn fertilizers on corn yield and fertilizer utilization
As can be seen from the analysis of Table 1, the economic yields of the corn of examples 1-3 and comparative examples 1-2 are respectively increased by 11.41%, 4.15%, 10.64%, 8.16% and 3.04%, and the fertilizer utilization rates are respectively increased by 6.10%, 2.23%, 0.10%, 4.06% and 2.02%, which shows that the use of the stabilized fertilizer containing the inhibitor in various proportions in combination with the polymer coated controlled release urea can effectively increase the economic yield and fertilizer utilization rate of the corn as compared with the use of the stabilized fertilizer containing the inhibitor alone. The special fertilizer for corn has good gain effect, can obviously increase the economic yield of corn, improve the quality of corn and obviously improve the utilization rate of the fertilizer.
While the fundamental and principal features of the invention and advantages of the invention have been shown and described, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.
Claims (9)
1. A special fertilizer for corn is characterized in that: the special fertilizer for corn is prepared from stable fertilizer containing an inhibitor and precisely compounded polymer coated controlled release urea, wherein the polymer coated controlled release urea is polyurethane coated controlled release urea with a controlled release period of 60 days, the mass fraction of nitrogen is 44%, and the stable fertilizer containing the inhibitor comprises the following raw materials in parts by weight: 60-70 parts of common urea, 20-30 parts of monoammonium phosphate, 30-40 parts of monopotassium phosphate, 10-20 parts of potassium chloride, 30-48 parts of medium trace elements, 25-35 parts of humic acid, 1.5-7.5 parts of nitrification inhibitor and 20-40 parts of filler.
2. The special fertilizer for corn of claim 1, wherein the medium trace elements are 5-10 parts of calcium, 20-30 parts of boron and 6-8 parts of molybdenum.
3. A fertilizer for corn as defined in claim 2, wherein: the medium trace elements are calcium gluconate, sodium octaborate tetrahydrate and ammonium molybdate.
4. The fertilizer for corn of claim 1, wherein: the humic acid is 25-35 parts of fulvic acid.
5. The fertilizer for corn of claim 1, wherein: the nitrification inhibitor is 1.5-7.5 parts of 3, 4-dimethylpyrazole phosphate; the filler is 20-40 parts of attapulgite.
6. A method for preparing the fertilizer special for corn as claimed in claim 1, wherein: the preparation method comprises the steps of raw material crushing, mixing and melting, slurry spraying and granulating, cooling and screening, blending and the like, and comprises the following specific steps: step one, crushing urea, and then placing the crushed urea into a urea melting tank to prepare urea melt; adding the nitrification inhibitor into urea melt, and fully and uniformly mixing to obtain mixed melt containing the inhibitor; step three, monoammonium phosphate, monopotassium phosphate, potassium chloride, medium trace elements, humic acid and filler are placed in a mixing tank to obtain mixed melt; step four, adding the mixed melt obtained in the step one into a mixing tank in the step three to be uniformly mixed so as to obtain a eutectic; step five, preparing a stable fertilizer containing an inhibitor; and step six, preparing special corn fertilizers with different precise compounding proportions.
7. The method of manufacturing according to claim 6, wherein: the internal temperature of the melting tank in the first step is raised to 130-140 ℃; .
8. The method of manufacturing according to claim 6, wherein: in the third step, the raw materials in the step are crushed and heated to 50-60 ℃ in a mixing tank; in the fifth step, a slurry spraying granulation and cooling screening process is adopted.
9. The method of manufacturing according to claim 8, wherein: and step six, the stable fertilizer containing the inhibitor and the polymer coated controlled release urea prepared in the step five are put into a stirrer according to different weight parts to be stirred for 6-10min, and are uniformly mixed.
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