CN116621633A - Water-retention slow-release fertilizer special for corn and preparation method thereof - Google Patents

Water-retention slow-release fertilizer special for corn and preparation method thereof Download PDF

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CN116621633A
CN116621633A CN202310306345.9A CN202310306345A CN116621633A CN 116621633 A CN116621633 A CN 116621633A CN 202310306345 A CN202310306345 A CN 202310306345A CN 116621633 A CN116621633 A CN 116621633A
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release fertilizer
corn
stirring
slow
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秦洁
宋莉
杨浩瑜
武晓燕
赵斌
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Tianjin Recyclable Resources Institute China Co-Op
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    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05D—INORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C; FERTILISERS PRODUCING CARBON DIOXIDE
    • C05D9/00—Other inorganic fertilisers
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01C—PLANTING; SOWING; FERTILISING
    • A01C21/00—Methods of fertilising, sowing or planting
    • A01C21/005—Following a specific plan, e.g. pattern
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G22/00—Cultivation of specific crops or plants not otherwise provided for
    • A01G22/20—Cereals
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
    • C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
    • C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
    • C05G3/40—Mixtures of one or more fertilisers with additives not having a specially fertilising activity for affecting fertiliser dosage or release rate; for affecting solubility
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
    • C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
    • C05G3/50—Surfactants; Emulsifiers
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
    • C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
    • C05G3/80—Soil conditioners
    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
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    • C12P1/00—Preparation of compounds or compositions, not provided for in groups C12P3/00 - C12P39/00, by using microorganisms or enzymes
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    • 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

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Abstract

The invention discloses a water-retention slow-release fertilizer special for corn, which comprises the following raw material components in parts by weight: 45-50 parts of biochemical fulvic acid, 10-20 parts of mining source fulvic acid, 20-30 parts of cellulose, 1-2 parts of starch, 4-7 parts of seaweed extract, 0.05-1 part of glycerol, 0.01-1 part of silica sol, 0.02-1 part of polyvinyl alcohol, 005-1 part of polyacrylamide and 0.01-1 part of tween (80). The special water-retaining slow-release fertilizer for corn is simple in preparation method, good in water-retaining slow-release effect, harmless to human bodies, pollution-free to the environment and capable of recycling agricultural resources, and raw materials are mostly taken from agricultural waste resources.

Description

Water-retention slow-release fertilizer special for corn and preparation method thereof
Technical Field
The invention relates to the technical field of fertilizer preparation, in particular to a water-retaining slow-release fertilizer special for corn and a preparation method thereof.
Background
In China, corn belongs to a variety of grains which are inferior to wheat and rice; in the world, corn belongs to the main variety in grains and is the most main variety of coarse grains. With the increase of human level, the importance of eating coarse food grain is becoming more and more evident. Corn plays a very important role in both ration and feed cultivation and deep processing. Compared with wheat and rice, the corn is more drought-resistant and cold-resistant, can be grown in barren areas more easily, and has better environmental adaptability. However, relatively poor soil requires more specialized corn fertilizers to produce high quality and high yield corn.
Nitrogen fertilizer is often applied in large quantities to improve corn yield in corn production for many years, so that the loss of nitrogen fertilizer is serious easily, and the environment is polluted. The artificial irrigation after the application of the nitrogenous fertilizer can cause a certain loss of available nutrients and pollution in the aspect of environment. There are a number of drawbacks to the current corn fertilizers on the market: the corn fertilizer in the market mainly adopts chemical fertilizers and cannot show specificity; corn is planted in drought areas, and common fertilizers have no water retention effect; the corn fertilizer belongs to quick-acting fertilizer, and needs follow-up topdressing, and has weaker slow release effect.
Disclosure of Invention
The invention aims to provide the water-retaining slow-release fertilizer special for corn, which has the advantages of simple preparation method, good water-retaining slow-release effect, and no harm to human bodies, no pollution to the environment and recycling of agricultural resources, and raw materials are mostly taken from agricultural waste resources.
The invention provides a special water-retaining slow-release fertilizer for corn, which comprises the following raw materials in parts by weight: 45-50 parts of biochemical fulvic acid, 10-20 parts of mining source fulvic acid, 20-30 parts of cellulose, 1-2 parts of starch, 4-7 parts of seaweed extract, 0.05-1 part of glycerol, 0.01-1 part of silica sol, 0.02-1 part of polyvinyl alcohol, 005-1 part of polyacrylamide and 0.01-1 part of tween (80).
Preferably, the solvent of the water-retaining slow-release fertilizer is water.
The preparation method of the water-retention slow-release fertilizer special for corn comprises the following steps of:
(1) Fully mixing biochemical fulvic acid, mining source fulvic acid and seaweed essence, putting the mixture into a reaction kettle with a stirring paddle, adding 50% of water in total, heating at 25 ℃ and continuously stirring at a stirring speed of 100r/min, and stirring for 1h to form brown slurry;
(2) Placing cellulose, polyvinyl alcohol and silica sol into a reaction kettle with stirring paddles, adding 50% of water, heating to 60 ℃, and stirring for 2.5h;
(3) Adding polyacrylamide, starch, tween (80) and glycerin into the step (2), heating to 80 ℃, stirring for 0.5h at the stirring speed of 200r/min to form mixed liquid, and cooling to 50 ℃;
(4) And (3) fully mixing the mixed liquid generated in the step (3) with the brown slurry generated in the step (1), increasing the stirring speed to 300r/min at 50 ℃, and naturally cooling the generated brown slurry for 0.5h to obtain the water-retaining slow-release fertilizer solution.
Preferably, in the step (2), the order of adding the cellulose, the polyvinyl alcohol and the silica sol is silica sol, then the polypropylene alcohol, the stirring speed is 200r/min, and finally the cellulose is slowly added, and the stirring speed is increased to 300r/min after the cellulose is added.
Preferably, the application method of the water-retaining slow-release fertilizer comprises the following steps: within 3 days after corn sowing, applying a water-retaining slow-release fertilizer, wherein the using amount of the slow-release fertilizer is 60kg per mu; mixing the water-retaining slow-release fertilizer and water according to the volume ratio of 1:5, uniformly stirring on site, and spraying at a position 20cm away from the ground.
The special water-retaining slow-release fertilizer for corn and the preparation method thereof have the advantages and positive effects that:
1. the humic acid prepared from agricultural waste is used as a main matrix, the biochemical fulvic acid takes plant residues as raw materials, and high-activity biochemical potassium fulvate is successfully prepared by biological fermentation, and the humic acid belongs to the component with the minimum molecular weight and the maximum activity in humic acid and is essence in humic acid active ingredients.
2. The water-retaining slow-release fertilizer provided by the invention adopts cellulose, starch and the like as water-retaining matrixes, and the cellulose is a water-retaining thickener, has high water retention rate and high swelling rate, and has excellent water absorption, so that the prepared liquid material has good stability.
3. The preparation method of the water-retaining slow-release fertilizer provided by the invention is simple, the raw materials are mostly taken from agricultural waste resources, the water-retaining slow-release fertilizer is harmless to human bodies and pollution-free to the environment, and the recycling type product of the agricultural resources is truly realized.
The technical scheme of the invention is further described in detail through examples.
Detailed Description
The technical scheme of the invention is further described below by examples.
Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs.
Example 1
A slow release fertilizer with a water retention function comprises the following raw materials: 30g of cellulose, 0.5g of polyvinyl alcohol, 0.3g of silica sol (30 nm), 0.07g of polyacrylamide, 1.63g of starch, 0.02g of tween (80), 0.09g of glycerol and 1300g of water.
The preparation method comprises the following steps:
(1) Weighing cellulose, polyvinyl alcohol and silica sol, adding 1000g of water into a reaction kettle with a stirring paddle, heating in a water bath, stirring continuously, heating to 60 ℃, and stirring for more than 2.5 hours at 300r/min to form turbid slurry;
(2) And (3) adding polyacrylamide, soluble starch, tween (80), glycerol and 300g of water into the turbid slurry, heating to 80 ℃, stirring for 0.5h, and naturally cooling to room temperature to obtain the slow release fertilizer with the water retention function.
Example 2
A special water-retaining slow-release fertilizer for corn comprises the following raw materials: 50g of biochemical fulvic acid, 13g of mineral fulvic acid, 30g of cellulose, 1.5g of starch, 6g of seaweed extract, 0.09g of glycerol, 0.3g of silica sol (30 nm), 0.5g of polyvinyl alcohol, 0.07g of polyacrylamide and 0.02g of tween (80).
The preparation method of the water-retaining slow-release fertilizer special for corn comprises the following steps:
(1) Weighing biochemical fulvic acid, mining source fulvic acid and seaweed extract, fully mixing, putting into a reaction kettle with a stirring paddle, adding 650g of water, heating at 25 ℃ and continuously stirring at a stirring speed of 100r/min, and stirring for more than 1h to form brown slurry;
(2) Weighing cellulose, polyvinyl alcohol and silica sol, adding 650g of water into a reaction kettle with a stirring paddle, heating in a water bath, stirring continuously, heating to 60 ℃, and stirring for more than 2.5 hours at 300r/min to form turbid slurry;
(3) Adding polyacrylamide, soluble starch, tween (80) and glycerol into the turbid slurry, heating to 80 ℃, stirring for 0.5h at a stirring speed of 200r/min to form a mixed liquid, and cooling to 50 ℃;
(4) And (3) fully mixing the mixed liquid produced in the step (3) with the brown slurry produced in the step (1), and increasing the stirring speed to 300r/min at 50 ℃ for 0.5h. Naturally cooling the brown slurry to obtain the water-retaining slow-release fertilizer solution special for corn.
Example 3
A special water-retaining slow-release fertilizer for corn comprises the following raw materials: 45g of biochemical fulvic acid, 10g of mineral fulvic acid, 25g of cellulose, 1.0g of starch, 5g of seaweed extract, 0.07g of glycerol, 0.5g of silica sol (30 nm), 0.09g of polyvinyl alcohol, 0.1g of polyacrylamide and 0.05g of tween (80).
A preparation method of a water-retention slow-release fertilizer special for corn comprises the following steps:
(1) Fully mixing biochemical fulvic acid, mining source fulvic acid and seaweed essence, putting into a reaction kettle with a stirring paddle, adding 650g of water, heating at 25 ℃ and continuously stirring at a stirring speed of 100r/min, and stirring for more than 1h to form brown slurry;
(2) Sequentially adding silica sol and polyvinyl alcohol into a reaction kettle with a stirring paddle, wherein the stirring speed is 200r/min, then adding cellulose, slowly adding cellulose, increasing the stirring speed to 300r/min after starting to add cellulose, then adding 650g of water, heating in a water bath, continuously stirring, heating to 60 ℃, and stirring for more than 2.5 hours to form turbid slurry;
(3) Adding polyacrylamide, starch, tween (80) and glycerol into the turbid slurry, heating to 80 ℃, stirring for 0.5h at a stirring speed of 200r/min to form a mixed liquid, and cooling to 50 ℃;
(4) And (3) fully mixing the mixed liquid produced in the step (3) with the brown slurry produced in the step (1), increasing the stirring speed to 300r/min at 50 ℃, and naturally cooling the produced brown slurry for 0.5h to obtain the special water-retaining slow-release fertilizer solution for corn.
Example 4
A special water-retaining slow-release fertilizer for corn comprises the following raw materials: 40g of biochemical fulvic acid, 20g of mineral fulvic acid, 20g of cellulose, 2.0g of starch, 4g of seaweed extract, 0.5g of glycerol, 0.8g of silica sol (30 nm), 1.0g of polyvinyl alcohol, 0.5g of polyacrylamide and 0.5g of tween (80).
A preparation method of a water-retention slow-release fertilizer special for corn comprises the following steps:
(1) Fully mixing biochemical fulvic acid, mining source fulvic acid and seaweed essence, putting into a reaction kettle with a stirring paddle, adding 650g of water, heating at 25 ℃ and continuously stirring at a stirring speed of 100r/min, and stirring for more than 1h to form brown slurry;
(2) Sequentially adding silica sol and polyvinyl alcohol into a reaction kettle with a stirring paddle, wherein the stirring speed is 200r/min, then adding cellulose, slowly adding cellulose, increasing the stirring speed to 300r/min after starting to add cellulose, then adding 650g of water, heating in a water bath, continuously stirring, heating to 60 ℃, and stirring for more than 2.5 hours to form turbid slurry;
(3) Adding polyacrylamide, starch, tween (80) and glycerol into the turbid slurry, heating to 80 ℃, stirring for 0.5h at a stirring speed of 200r/min to form a mixed liquid, and cooling to 50 ℃;
(4) And (3) fully mixing the mixed liquid produced in the step (3) with the brown slurry produced in the step (1), increasing the stirring speed to 300r/min at 50 ℃, and naturally cooling the produced brown slurry for 0.5h to obtain the special water-retaining slow-release fertilizer solution for corn.
Comparative example
The effect detection of the water-retaining slow-release fertilizer special for corn prepared by the invention is carried out by taking the water-retaining fertilizer produced by a certain company on the market as a comparative example, and the test method and the result are as follows:
the application method of the water-retaining slow-release fertilizer comprises the following steps: within 3 days after corn sowing, applying a water-retaining slow-release fertilizer, wherein the using amount of the slow-release fertilizer is 60kg per mu; mixing the water-retaining slow-release fertilizer and water according to the volume ratio of 1:5, uniformly stirring on site, pouring into an agricultural liquid sprayer, and spraying at the position 20cm away from the ground, or spraying by using a drip irrigation belt.
A total of 4 treatments were set up, blank control, example 1, example 2 and comparative example, respectively.
The test was carried out by sowing on day 5 and day 11, spraying the fertilizer obtained in the blank control example, example 1, example 2 and comparative example on day 5 and day 13, the treated corn planting and the soil for planting and the corn field management measure were the same, and other substances for promoting crop growth such as pesticide and fertilizer were not applied during the test period, and the test was harvested on day 8 and day 1.
Measurement item
1. Agronomic traits of maize
5 corn plants are randomly taken as samples before harvest, and the yield composition indexes of the fresh weight of each corn bud, the net weight of each corn spike, the spike length, the bald tip length, the spike row, the grain number and the hundred grain weight are investigated.
Table 1 corn trait comparison
Treatment of Fresh weight of bud (g) Spike weight (g) Spike length (cm) Bald tip length (cm) Ear of grain is gone Rong Keli
Blank control 340.89±13.62 256.7±8.31 20.5±0.42 0.2±0.2 17.4±0.98 36.8±1.24
Example 1 358.67±8.57 236.06±8.61 18.8±0.2 0.3±0.3 17.8±0.37 34.2±0.97
Example 2 374.14±13.74 277.62±8.13 19.8±0.49 0.95±0.46 18.8±0.37 35.2±1.63
Comparative example 368.69±18.53 263.86±9.26 19.4±0.73 0.81±0.36 18.4±0.81 36.6±2.06
2. Corn yield
Calculating the per-mu yield of the corn by measuring and calculating the per-mu yield of the corn (kg/mu) =mu plant number, spike number, hundred grain weight/10 5 。
Table 2 corn yield comparison
Treatment of Hundred weight (g) Yield (kg/mu) Number of plants per unit area
Blank control 28.12±0.81 367.53±23.83 2044.74
Example 1 27.47±0.89 520.53±32.82 3102.24
Example 2 30.03±0.4 669.55±41.8 3362.02
Comparative example 30.01±1.21 610.02±34.65 3040.00
From the data in tables 1 and 2, it can be seen that the agronomic traits and acre yield of the corn applied with the water-retaining slow-release fertilizer special for corn are optimal.
3. Moisture content of corn soil
The soil moisture content is measured by adopting an aluminum box soil sampling sample to measure the soil moisture of 0-15 cm on the soil surface layer.
Table 3 comparison of soil moisture content after corn harvesting
Treatment of Moisture content (%)
Blank control 14.08±1.08
Example 1 15.4±1.72
Example 2 16.32±1.44
Comparative example 14.48±2.42
From Table 3, it is clear that the water content of the soil after harvesting corn to which the fertilizer of example 2 was applied was highest, indicating that the resulting water-retaining slow-release fertilizer of example 2 had good water-retaining properties.
4. Physical and chemical index of root system soil after harvesting corn
The soil organic carbon is measured by adopting a potassium chromate oxidation-spectrophotometry method; the total nitrogen content is measured by a semi-trace Kjeldahl method; the total phosphorus in the soil is measured by adopting an alkali fusion-molybdenum-antimony spectrophotometry.
Table 4 comparison of soil physicochemical index after corn harvesting
From table 4, it is clear that the soil physical and chemical indexes of the water-retention slow-release fertilizer obtained in the application example 2 are the lowest, which indicates that the water-retention slow-release fertilizer obtained in the application example 2 is best in corn absorption, and the fertility enters plants through the absorption of corn root systems, so that the corn yield of the application example 2 fertilizer is the highest, the soil fertility of the planting is reduced, which indicates that the water-retention slow-release fertilizer obtained in the application example 2 is easy to be absorbed by corn, is special for corn, and promotes high yield of corn.
Therefore, the special water-retaining slow-release fertilizer for corn is simple in preparation method, good in water-retaining slow-release effect, harmless to human bodies, pollution-free to the environment and capable of recycling agricultural resources, and raw materials are mostly taken from agricultural waste resources.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention and not for limiting it, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that: the technical scheme of the invention can be modified or replaced by the same, and the modified technical scheme cannot deviate from the spirit and scope of the technical scheme of the invention.

Claims (5)

1. The special water-retaining slow-release fertilizer for corn is characterized by comprising the following raw material components in parts by weight: 45-50 parts of biochemical fulvic acid, 10-20 parts of mining source fulvic acid, 20-30 parts of cellulose, 1-2 parts of starch, 4-7 parts of seaweed extract, 0.05-1 part of glycerol, 0.01-1 part of silica sol, 0.02-1 part of polyvinyl alcohol, 005-1 part of polyacrylamide and 0.01-1 part of tween (80).
2. The special water-retaining slow release fertilizer for corn of claim 1, wherein the slow release fertilizer is characterized in that: the solvent of the water-retaining slow-release fertilizer is water.
3. The preparation method of the water-retaining slow-release fertilizer special for corn according to any one of claims 1-2, which is characterized by comprising the following steps:
(1) Fully mixing biochemical fulvic acid, mining source fulvic acid and seaweed essence, putting the mixture into a reaction kettle with a stirring paddle, adding 50% of water in total, heating at 25 ℃ and continuously stirring at a stirring speed of 100r/min, and stirring for 1h to form brown slurry;
(2) Placing cellulose, polyvinyl alcohol and silica sol into a reaction kettle with stirring paddles, adding 50% of water, heating to 60 ℃, and stirring for 2.5h;
(3) Adding polyacrylamide, starch, tween (80) and glycerin into the step (2), heating to 80 ℃, stirring for 0.5h at the stirring speed of 200r/min to form mixed liquid, and cooling to 50 ℃;
(4) And (3) fully mixing the mixed liquid generated in the step (3) with the brown slurry generated in the step (1), increasing the stirring speed to 300r/min at 50 ℃, and naturally cooling the generated brown slurry for 0.5h to obtain the water-retaining slow-release fertilizer solution.
4. The preparation method of the water-retaining slow-release fertilizer special for corn, which is characterized by comprising the following steps of: in the step (2), the adding sequence of the cellulose, the polyvinyl alcohol and the silica sol is silica sol firstly, then the polyacrylate is adopted, the stirring speed is 200r/min, finally the cellulose is slowly added, and the stirring speed is increased to 300r/min after the cellulose is added.
5. The special water-retaining slow-release fertilizer for corn of claim 1, wherein the application method of the water-retaining slow-release fertilizer is as follows: within 3 days after corn sowing, applying a water-retaining slow-release fertilizer, wherein the using amount of the slow-release fertilizer is 60kg per mu; the water-retaining slow-release fertilizer and water are mixed according to the volume ratio of 1:5, mixing, uniformly stirring on site, and spraying at a position 20cm away from the ground.
CN202310306345.9A 2023-03-27 2023-03-27 Water-retention slow-release fertilizer special for corn and preparation method thereof Pending CN116621633A (en)

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CN111675576A (en) * 2020-08-03 2020-09-18 临沂市农业科学院 Drought-resistant water-retaining coated controlled-release agent for corn and preparation method thereof
CN111995470A (en) * 2020-09-11 2020-11-27 成都云图控股股份有限公司 Mineral source fulvic acid slow release fertilizer and preparation method thereof
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CN115286453A (en) * 2022-08-17 2022-11-04 新疆正易龙农资有限公司 Urea formaldehyde mineral source potassium fulvate fertilizer and preparation method thereof

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Publication number Priority date Publication date Assignee Title
CN101585739A (en) * 2007-12-31 2009-11-25 泰安市农业科学研究院 A kind of double-effect water-protecting fertiliser and preparation method thereof
CN106242826A (en) * 2016-08-26 2016-12-21 山东三方化工集团有限公司 A kind of drought resisting, all nutrition type Semen Maydis long-acting special fertilizer and preparation method thereof
CN108658673A (en) * 2018-06-27 2018-10-16 安徽瑞然生物药肥科技有限公司 A kind of coated fertilizer and preparation method thereof for slow release fertilizer
CN111675576A (en) * 2020-08-03 2020-09-18 临沂市农业科学院 Drought-resistant water-retaining coated controlled-release agent for corn and preparation method thereof
CN111995463A (en) * 2020-08-25 2020-11-27 施可丰化工股份有限公司 Spraying production process of mineral source potassium fulvate compound fertilizer
CN111995470A (en) * 2020-09-11 2020-11-27 成都云图控股股份有限公司 Mineral source fulvic acid slow release fertilizer and preparation method thereof
CN115286453A (en) * 2022-08-17 2022-11-04 新疆正易龙农资有限公司 Urea formaldehyde mineral source potassium fulvate fertilizer and preparation method thereof

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