CN1112538A - Granulated fertilizer coating technique, coating material producing process and formula - Google Patents
Granulated fertilizer coating technique, coating material producing process and formula Download PDFInfo
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- CN1112538A CN1112538A CN 95102231 CN95102231A CN1112538A CN 1112538 A CN1112538 A CN 1112538A CN 95102231 CN95102231 CN 95102231 CN 95102231 A CN95102231 A CN 95102231A CN 1112538 A CN1112538 A CN 1112538A
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Abstract
The coating material for fertilizer contains animal glue, solubilizer, organic acids, inorganic acids, inorganic trace elements salts and surface active agent. The coated fertilizer is produced in a prilling tower by means of mechanical spray technology or manual coating method, the amount of the coating material is 0.3-0.8%, nitrogen content for each ton of product is up to 46%. The coated fertilizer can increase the yield by 5-6% for paddy rice, 7-8% for sugarcane, 4-10% for peanut, 7-17% for vegetable, 10.2% for wheat and 13.2% for cotton.
Description
The invention belongs to slow release fertilizer.
Prior art: produce slow release fertilizer abroad and generally be divided into two big classes: the first kind is the slow release fertilizer that substance reactions such as urea and aldehydes generate; Second class is a coated fertilizer, adopts sulphur, polymkeric substance (polyvinyl chloride, polyethylene, polypropylene, resol, urethane etc.) and oils, paraffin etc.The employed coated material of external this fertilizer of production generally accounts for the 10-20% of slow release fertilizer product gross weight; Product nitrogen content per ton is between the 36-37%, and the price height improves 31% approximately as the cost of U.S.'s sulfur-coated urea nitrogen per ton, so can only be used for high price crops such as lawn, flowers, can not be used for the land for growing field crops and produce.
The technical solution used in the present invention has overcome the problems referred to above, produces the coated fertilizer that low cost can be used for the land for growing field crops.Its scheme is to develop the low-cost coated material that contains gelatin, adopts mechanical injection coating technology and manual coating technology, produces coated fertilizer, and the coated material consumption only accounts for the 0.3-0.8% of coated fertilizer product gross weight; Product nitrogen content per ton is＞46%, and is close with the nitrogen content of urea, and the cost of coating urea of the present invention nitrogen per ton only improves 5.68%, has only 1/5th of sulfur-coated urea, demonstrates remarkable advantages.
Coated material prescription of the present invention:
Gelatin: 0.5～2.5 part
Solubilizing agent: 10～25 parts
Organic acid: 0.5～1.5 part
Mineral acid: 10～30 parts
Trace element inorganic salt: 30～50 parts
Non-metallic element: 40～60 parts
Tensio-active agent: 0.5～1.5 part.
In the above-mentioned coated material prescription, it is characterized in that gelatin is animal skin glue, gelatine, epoxy glue etc.
In the above-mentioned coated material prescription, it is characterized in that solubilizing agent is inorganic salts, be preferably inorganic Ammonia, as urea, ammonium sulfate, ammonium nitrate etc.
In the above-mentioned coated material prescription, it is characterized in that micro-inorganic salt are the inorganic salt of elements such as iron, zinc, manganese, molybdenum, copper, magnesium, vanadium.
In the above-mentioned coated material prescription, it is characterized in that non-metallic element is element compounds such as boron, sulphur, hydrogen, oxygen.
In the above-mentioned coated material prescription, it is characterized in that tensio-active agent is a cats product.
Coated material production technique of the present invention: contain raw materials such as gelatin, solubilizing agent, organic acid, mineral acid, micro-inorganic salt, non-metallic element and tensio-active agent, feed intake according to the above ratio, add the inorganic salt of elements such as iron, zinc, manganese, molybdenum, copper, magnesium, vanadium in the different time.Raw material is through the part pre-treatment, adds in the reactor, and in normal temperature and pressure reaction down, the interruption method is produced, and reaction times 50-100 minute, reaction finished and is coated material after isolating mechanical impurity again.
Coated material with above-mentioned prepared, with fertilizer such as urea granules surface certain avidity is arranged, a spot of coated material can be coated the fertiliser granulates surface equably, and have and infiltrate through on a small quantity in the fertiliser granulates, after coated material is done solid oxidation, can form one deck coating as thin as a wafer on the fertiliser granulates surface.Thereby improve the physicals and the agricultural voltinism matter of fertilizer.According to this specific character, designed mechanical injection coating technology and manual coating technology, produce coating particles fertilizer.The mechanical injection coating technology is produced coating particles fertilizer flow process: the coating material solution for preparing is delivered to solution tank, and with being pumped to header tank, solution flows out from header tank by high potential difference again, divides and delivers to each injector.0.3-0.5MPa pressurized air send into the injector device from Outer Tube, by nozzle ejection, produce suction function, coating material solution is sucked injector, after the gas-liquid mixed, spray in the granulation of fertilizer tower with spray form, the granulated fertilizer that falls with prilling tower top contacts, form coating on the granulated fertilizer surface, by means of the heat of fertilizer own, the moisture evaporation in the coating solution is fallen, coating is done solid oxidation, finish the spraying production technique, send packaging system.
The underlying condition of mechanical injection coating process: air pressure: 0.3-0.5MPa, coating liquid consumption are fertilizer per ton coating liquid 6-10 kilogram.
By trial production, confirm that its integrated artistic has following characteristics:
1. industrialization flow process is simple, and device structure is uncomplicated, transform easily, and less investment, operation is regulated easily, and maintenance load is little, is convenient to management.
2. coated material is synthetic at normal temperatures and pressures, and spraying process carries out synchronously with urea production in urea prilling tower, and once shaped; Can utilize the heat of urea itself again, it is solid that coating is done, and do not need to establish drying, cooling system in addition, has certain advance and novelty and practicality.
3. in process of production, reduce carbamide dust and ammonia content in the exhaust of granulation cat head, reduce the pollution of exhaust environment.
Coating particles fertilizer carries out large-scale experiment under two kinds of edaphic conditions of the two kinds of weathers in province north and south such as Guangdong and Hebei.By in office analysis, field experiment and sign demonstration prove that coating particles fertilizer is applicable to food crop, cash crop and vegetables etc.Illustrate increasing yield and the reason of coated fertilizer to paddy rice, sugarcane etc., coated fertilizer has positive effect than general chemical fertilizer, its amount of increase in production to crops such as paddy rice, sugarcane, peanut, vegetables, wheat, summer corn, cottons: paddy rice 5-6%, sugarcane 7-8%, peanut 4-10%, vegetables (heart of a cabbage, green cucumber) 7%, (Chinese cabbage) 17%, wheat 10.2%, summer corn 9.7%, cotton 13.2%.
The present invention is fully proved with following example:
Embodiment 1: paddy rice is used coated fertilizer
The coated material prescription:
Gelatin: 2 parts
Solubilizing agent: 12 parts
Organic acid: 0.5 part
Mineral acid: 10 parts
Trace element inorganic salt: 15 parts
Non-metallic element: 42 parts
Tensio-active agent: 0.5 part.
By above-mentioned prescription, through the part pre-treatment, add in the reactor, in normal temperature and pressure reaction down, the interruption method is produced, and reaction times 50-70 minute, reaction finished and is coated material after isolating mechanical impurity again.
The coated material of making is sprayed at urea granules surface (consumption is 0.7%), after doing solid oxidation, make coating urea and be used for paddy rice, comprehensively contrast through 3 years test-results of 1987-1989, the paddy rice number of productive ear of applied layer urea increases 8000 fringes than the comprehensive average mu of the paddy rice of executing common urea, many 3.28 of the every fringe of real grain.472.15 kilograms of the comprehensive average yield per mu paddy of the paddy rice of applied layer urea; Execute 448.9 kilograms of the comprehensive average yield per mu paddy of paddy rice of common urea, 23.25 kilograms of mu volume increase paddy, stimulation ratio 5.18%; It is high by 0.34% that rice matter also is that the ratio of applied layer urea is executed the paddy rice such as the protein content of common urea, and amylose starch is high by 0.89%.
Embodiment 2: sugarcane is used coated fertilizer
The coated material prescription:
Epoxy glue: 1 part
Solubilizing agent: 10 parts
Organic acid: 0.5 part
Mineral acid: 15 parts
Trace element inorganic salt: 17 parts
Non-metallic element: 50 parts
Tensio-active agent: 1 part.
By above-mentioned prescription, through the part pre-treatment, add in the reactor, in normal temperature and pressure reaction down, the interruption method is produced, and reaction times 70-100 minute, reaction finished and is coated material after isolating mechanical impurity again.
The coated material of making is mixed and is applied to urea granules surface (consumption is 0.7%), after doing solid oxidation, make coating urea and be used for sugarcane, making the comprehensive contrast of test-results in 3 years three through 1987-1989 shows, on the basis of mu basic seedling amount unanimity, the sugarcane of applied layer urea than the sugarcane mu number of productive tiller of executing common urea Duo long 6.6 centimeters of 40, stem, stem footpath in middle part is big 0.09 centimeter, the caudal stem footpath is big 0.17 minute; 9737.74 kilograms of the comprehensive average yield per mus of the sugarcane of applied layer urea, than 9051.95 kilograms of the comprehensive average yield per mus of the sugarcane of executing common urea, 685.8 kilograms of mu volume increase, stimulation ratio 7.58%; The sugarcane sugar degree of applied layer urea is higher by 0.357% than the sugarcane sugar degree of executing common urea.
Embodiment 3: the peanut coated fertilizer
The coated material prescription:
Animal epoxy glue: 1 part
Solubilizing agent: 13 parts
Organic acid: 0.5 part
Mineral acid: 20 parts
Trace element inorganic salt: 19 parts
Non-metallic element: 42 parts
Tensio-active agent: 0.5 part.
By above-mentioned prescription, through the part pre-treatment, add in the reactor, in normal temperature and pressure reaction down, the interruption method is produced, and reaction times 70-80 minute, reaction finished and is coated material after isolating mechanical impurity again.
The coated material of making is sprayed at urea granules surface (consumption is 0.7%), after doing solid oxidation, make coating urea and be used for peanut, totally three make the comprehensive contrast of test-results and show through 1988-1989 one autumn of 2 years two spring, the comprehensive average branch of peanut than executing common urea of applied layer urea is Duoed 0.03, individual plant always presss from both sides really many 1.22, many 0.7 of full fruit number, and half kilogram of pod lacks 18.3, heavy many 1.4 grams of high 0.8%, hundred benevolence of kernel percent; 221.6 kilograms of the comprehensive per mu yields of the peanut of applied layer urea, than 203.7 kilograms of the comprehensive per mu yields of the peanut of executing common urea, 17.9 kilograms of mu volume increase, stimulation ratio 8.79%.
Embodiment 4: the heart of a cabbage coated fertilizer
The coated material prescription:
Animal skin glue: 1.5 parts
Solubilizing agent: 15 parts
Organic acid: 0.5 part
Mineral acid: 15 parts
Trace element inorganic salt: 20 parts
Non-metallic element: 45 parts
Tensio-active agent: 0.7 part.
By above-mentioned prescription, through the part pre-treatment, add in the reactor, in normal temperature and pressure reaction down, the interruption method is produced, and reaction times 70-90 minute, reaction finished and is coated material after isolating mechanical impurity again.
The coated material of making is sprayed at urea granules surface (consumption is 0.7%), after doing solid oxidation, make coating urea and be used for Chinese cabbage, show obvious effect of increasing production in the comprehensive contrast of Handan, Hebei province test-results, from constituting the yield factors result: 52.6 centimetres of the plant heights of applied layer urea; Execute common urea 50.8 centimetres; 3.43 kilograms of individual plant heavy dressing coating urea, 2.74 kilograms of executing common urea, 2.88 kilograms of single ball heavy dressing coating urea, 2.16 kilograms of executing common urea; 81% of clean vegetables rate applied layer urea is executed 76.5% of common urea, 9808 kilograms in the Chinese cabbage of average yield per mu applied layer urea, and 8350 kilograms in the Chinese cabbage of executing common urea is on average increased production 1458 kilograms, stimulation ratio 17%.
Embodiment 5: the wheat coated fertilizer
The coated material prescription:
Animal skin glue: 1.5 parts
Solubilizing agent: 13 parts
Organic acid: 1 part
Mineral acid: 20 parts
Trace element inorganic salt: 22 parts
Non-metallic element: 50 parts
Tensio-active agent: 0.5 part.
By above-mentioned prescription, through the part pre-treatment, add in the reactor, in normal temperature and pressure reaction down, the interruption method is produced, and reaction times 70-90 minute, reaction finished and is coated material after isolating mechanical impurity again.
The coated material of making is sprayed at urea granules surface (consumption is 0.7%), after doing solid oxidation, make coating urea and be used for wheat, the coating urea and the comprehensive contrast of common urea fertilizer efficiency contrast (totally 33 wheats of selecting are used 20-30 kilogram/mu) test-results of using equivalent from the 1991-1993 wheat show: obvious effect of increasing production, the ratio of applied layer urea is used 38.7 kilograms/mu of the volume increase wheats of executing common urea of equivalent, stimulation ratio is 10.1%, and the variation between year border is little, shows that the fertilizer efficiency of coating urea is more stable.The performance of its volume increase is that effectively the branch evil increases, grain number per spike and thousand seed weight all has increase, and aspect quality, the content of protein and Methionin also has increase.This remove with coating in contain various trace elements and reduce outside the Pass nitrogen loss etc. has, also discharging the fertile rule of the suction that has adapted to wheat with the available nutrient of coating urea has important relationship.3.43 kilograms of individual plant heavy dressing coating urea, 2.74 kilograms of executing common urea, 2.88 kilograms of single ball heavy dressing coating urea, 2.16 kilograms of executing common urea; 81% of clean vegetables rate applied layer urea is executed 76.5% of common urea, 9808 kilograms in the Chinese cabbage of average yield per mu applied layer urea, and 8350 kilograms in the Chinese cabbage of executing common urea is on average increased production 1458 kilograms, stimulation ratio 17%.
Embodiment 6: the summer corn coated fertilizer
The coated material prescription:
Animal skin glue: 10 parts
Solubilizing agent: 15 parts
Organic acid: 6 parts
Boric acid: 4 parts
Molybdate: 0.2 part
Manganous sulfate: 20 parts
Zinc sulfate: 24 parts
Sal epsom: 24 parts
Copper sulfate: 24 parts
Ferrous sulfate: 136 parts
Urea: 152 parts
Cats product (905): 30 parts.
By above-mentioned prescription, through the part pre-treatment, add in the reactor, in normal temperature and pressure reaction down, the interruption method is produced, and reaction times 50-70 minute, reaction finished and is coated material after isolating mechanical impurity again.
The coated material of making is sprayed at urea granules surface (consumption is 0.7%), after doing solid oxidation, make coating urea and be used for summer corn, contrast is tested a little statistics and comprehensively contrasted and show according to 30 coating ureas of 1991-1993 and common urea fertilizer efficiency: the footpath of increased corn of using coating urea is thick, increase the photosynthetic capacity of functional leaf, promote robust plant and the effect that can continue plant senesecence, so to the fringe portion proterties of summer corn is that grain number per spike and thousand seed weight have great effect, evidence in 3 years is used the summer corn grain number per spike of coating urea and thousand seed weight all than the height of executing common urea.Increased by 33.5 and 13.3 grams in 1991 respectively.
Embodiment 7: cotton is used coated fertilizer
The coated material prescription:
Animal skin glue: 1 part
Solubilizing agent: 10 parts
Organic acid: 1 part
Mineral acid: 20 parts
Trace element inorganic salt: 22 parts
Non-metallic element: 50 parts
Tensio-active agent: 0.5 part.
By above-mentioned prescription, through the part pre-treatment, add in the reactor, in normal temperature and pressure reaction down, the interruption method is produced, and reaction times 70-100 minute, reaction finished and is coated material after isolating mechanical impurity again.
The coated material of making is sprayed at urea granules surface (consumption is 0.7%), after doing solid oxidation, make coating urea and be used for cotton, totally 32 points from 1991-1993 cotton complete test district, use 74.5 kilograms of the cotton per mu yield gined cottons of coating urea, use 65.8 kilograms of the cotton per mu yield gined cottons of common urea, the ratio of applied layer urea is used Zao two days of the cotton early flowering season of executing common urea of equivalent, early two～three days term of opening bolls, therefore spend many before the frost, stiff lobe rate is few, add up according to multiple spot: spend manyly 14.3% before the frost, ginning outturn is many 0.5%, and suede is long many 1.3 millimeters.Cotton fiber physical index measurement result is used the coating urea ratio and is executed common urea, many 60 meters of fiber fineness, improve 1.1%, many 0.5 millimeter of photoelectricity instrument principal length improves 1.5%, powerful many 0.1 grams, improve 2.5%, many 0.8 kms of length of fracture improve 3.6%, mature coefficient many 0.04, improve 2.6%, improved cotton quality.
Embodiment 8: coating composite fertilizer sugarcane is used
The coated material prescription:
Epoxy glue: 1 part
Solubilizing agent: 10 parts
Organic acid: 0.5 part
Mineral acid: 15 parts
Trace element inorganic salt: 15 parts
Non-metallic element: 45 parts
Tensio-active agent: 0.5 part.
By above-mentioned prescription, through the part pre-treatment, add in the reactor, in normal temperature and pressure reaction down, the interruption method is produced, and reaction times 50-100 minute, reaction finished and is coated material after isolating mechanical impurity again.
The 1.5% Manufactured coated material that adds the compound manure gross weight, with the compound manure back oven dry that stirs, the coating compound manure.
Now select N: P: K=11 for use: the coating compound manure of 6: 8 compound manure and same proportioning is applied to sugarcane, 190 kilograms of every mu of consumptions, divide base manure, tillering stage dressing, growth applies for fertile three times, in early March, 1991 is sowed, on February 25th, 1992 gathered in the crops, according to the test in place observation survey, coating compound manure fertilizer efficiency is long, can adapt to the fertile demand of each confession breeding time of sugarcane, economical character is good, the ratio of using compound manure is used long 15.3 centimetres of the sugarcane stem of common compound manure, the sugarcane stem increases thick 0.11 centimetre, single stem heavily increases by 0.016 kilogram, many 286 of mu number of productive tiller, applied layer compound manure per mu yield sugarcane is 4870 kilograms as a result, execute 4464 kilograms of common compound manure per mu yield sugarcanes, 406 kilograms of mu volume increase sugarcanes, stimulation ratio 9.1%.
The preparation of embodiment 9 coated materials
Produce 1 ton of preparation methods that is used for the urea prilling tower spraying: in the reactor that band stirs, add 500 kilograms of hot water, start agitator, add 10 kilograms of gelatin, stirred 30 minutes, add 152 kilograms in urea, stirred 10 minutes, add 4 kilograms of boric acid then successively, 6 kilograms of organic acids, stir and add 20 kilograms of manganous sulfates after 5 minutes, 24 kilograms in zinc sulfate, 24 kilograms in sal epsom, 4 kilograms in copper sulfate, continuing to be stirred to the inorganic salt that added dissolves fully, add 30 kilograms of 905 cats products again, add 136 kilograms in ferrous sulfate after stirring, continue to be stirred to dissolving fully, add 0.2 kilogram of molybdate at last, stirred 5 minutes, and can take out and be coated material after separating some mechanical impuritys of sneaking into.
Embodiment 10 spraying coating process
Urea system is in the ordinary production state; Check that whole paint finishing equipment, valve, every processing condition meet the standard state that goes into operation.Coating solution is put into sloptank, to certain liquid level, start solution pump, coating solution is delivered to header tank, treat that the header tank liquid level rises at 1/2 o'clock, open the header tank outlet valve, before coating solution flow to the variable valve of the nozzle that is contained in the logical device door in prilling tower bottom along pipeline, open the pressurized air that inserts nozzle then, and keep house steward's compressed air pressure to be stabilized in 0.4MPa, check each jet nozzle jet normal after, drive the solution variable valve of each nozzle slightly, according to 627 kilograms of coating of urea production control coating input amount urea per ton, the color of observing out the prilling tower coating urea then, the spraying homogeneity, situations such as moisture content, with the angle between each nozzle, the elevation angle, the coating input amount, condition variation such as compressed air pressure are come the control coating urea quality, get final product to such an extent that meet the coating urea of this patent requirement.
Claims (11)
1, a kind of fertilizer coated material is characterized in that the coated material prescription, contains
Gelatin: 0.5～2.5 part
Solubilizing agent: 10～25 parts
Organic acid: 0.5～1.5 part
Mineral acid: 10～30 parts
Trace element inorganic salt: 30～50 parts
Non-metallic element: 40～60 parts
Tensio-active agent: 0.5～1.5 part.
2, fertilizer coated material according to claim 1 is characterized in that gelatin is animal skin glue, gelatine, epoxy glue.
3, fertilizer coated material according to claim 1 is characterized in that solubilizing agent is inorganic salts, is preferably inorganic Ammonia, as urea, ammonium sulfate, ammonium nitrate.
4, fertilizer coated material according to claim 1 is characterized in that micro-inorganic salt are the inorganic salt of iron, zinc, manganese, molybdenum, copper, magnesium, v element.
5, fertilizer coated material according to claim 1 is characterized in that non-metallic element is boron, sulphur, carbon compound.
6, fertilizer coated material according to claim 1 is characterized in that tensio-active agent is a cats product.
7, the fertilizer coated material production technique of claim 1, it is characterized in that containing gelatin, solubilizing agent, organic acid, mineral acid, micro-inorganic salt, non-metallic element and tensio-active agent raw material, feed intake according to the above ratio, add the inorganic salt of iron, zinc, manganese, molybdenum, copper, magnesium, alum element at different time.Raw material is through the part pre-treatment, adds in the reactor, and in normal temperature and pressure reaction down, the interruption method is produced, and reaction times 50-100 minute, reaction finished and is coated material after isolating mechanical impurity.
8, a kind of coated fertilizer is characterized in that using the described fertilizer coated material of claim 1 as fertilizer sources coating material.
9, coated fertilizer according to claim 8 is characterized in that coating process is mechanically spraying technology or manual application.The air conveying injector of mechanically spraying process using is a medium with the compressed gas, and coated solution is sucked injector, after the air mixed atomizing, sprays in the granulation of fertilizer tower, is applied to the fertilizer surface, and coating is done solid oxidation and formed coating particles fertilizer.
10, coated fertilizer according to claim 8 is characterized in that it is 0.3～0.5MPa that spraying coating process adopts air conveying air pressure; Fertilizer per ton is the 6-10 kilogram with the coating solution consumption.
11, coated fertilizer according to claim 8 is characterized in that this coated fertilizer is used for food crop, cash crop, vegetable crop.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95102231 CN1112538A (en) | 1995-03-16 | 1995-03-16 | Granulated fertilizer coating technique, coating material producing process and formula |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95102231 CN1112538A (en) | 1995-03-16 | 1995-03-16 | Granulated fertilizer coating technique, coating material producing process and formula |
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| CN1112538A true CN1112538A (en) | 1995-11-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 95102231 Pending CN1112538A (en) | 1995-03-16 | 1995-03-16 | Granulated fertilizer coating technique, coating material producing process and formula |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1042629C (en) * | 1997-08-29 | 1999-03-24 | 河北省沧州大化集团有限责任公司 | Controllable slowly-released granular urea fertilizer and its prepn. method |
| CN104355883A (en) * | 2014-11-16 | 2015-02-18 | 刘健 | Special formulated fertilizer for wheat |
| CN104355882A (en) * | 2014-11-16 | 2015-02-18 | 刘健 | Special formulated fertilizer applied to wheat |
| CN104355910A (en) * | 2014-11-25 | 2015-02-18 | 刘健 | Compound corn fertilizer |
| CN104355754A (en) * | 2014-11-16 | 2015-02-18 | 刘健 | Formulated fertilizer for wheat |
| CN104355773A (en) * | 2014-11-16 | 2015-02-18 | 刘健 | Compound fertilizer for wheat |
| CN107200637A (en) * | 2017-06-23 | 2017-09-26 | 合肥市风达农业有限责任公司 | A kind of coated fertilizer and preparation method thereof |
-
1995
- 1995-03-16 CN CN 95102231 patent/CN1112538A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1042629C (en) * | 1997-08-29 | 1999-03-24 | 河北省沧州大化集团有限责任公司 | Controllable slowly-released granular urea fertilizer and its prepn. method |
| CN104355883A (en) * | 2014-11-16 | 2015-02-18 | 刘健 | Special formulated fertilizer for wheat |
| CN104355882A (en) * | 2014-11-16 | 2015-02-18 | 刘健 | Special formulated fertilizer applied to wheat |
| CN104355754A (en) * | 2014-11-16 | 2015-02-18 | 刘健 | Formulated fertilizer for wheat |
| CN104355773A (en) * | 2014-11-16 | 2015-02-18 | 刘健 | Compound fertilizer for wheat |
| CN104355910A (en) * | 2014-11-25 | 2015-02-18 | 刘健 | Compound corn fertilizer |
| CN107200637A (en) * | 2017-06-23 | 2017-09-26 | 合肥市风达农业有限责任公司 | A kind of coated fertilizer and preparation method thereof |
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