CN114085107A - Humic acid water-soluble fertilizer and preparation method thereof - Google Patents
Humic acid water-soluble fertilizer and preparation method thereof Download PDFInfo
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- CN114085107A CN114085107A CN202111273868.5A CN202111273868A CN114085107A CN 114085107 A CN114085107 A CN 114085107A CN 202111273868 A CN202111273868 A CN 202111273868A CN 114085107 A CN114085107 A CN 114085107A
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05B—PHOSPHATIC FERTILISERS
- C05B1/00—Superphosphates, i.e. fertilisers produced by reacting rock or bone phosphates with sulfuric or phosphoric acid in such amounts and concentrations as to yield solid products directly
- C05B1/02—Superphosphates
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
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- 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
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
- C05G3/80—Soil conditioners
-
- 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
- C05G5/00—Fertilisers characterised by their form
- C05G5/10—Solid or semi-solid fertilisers, e.g. powders
- C05G5/12—Granules or flakes
-
- 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
- C05G5/00—Fertilisers characterised by their form
- C05G5/30—Layered or coated, e.g. dust-preventing coatings
- C05G5/35—Capsules, e.g. core-shell
Abstract
The invention relates to a humic acid water-soluble fertilizer and a preparation method thereof, belonging to the technical field of fertilizers. The fertilizer comprises water-controlling core balls, wherein compound fertilizer particle layers are adhered to the surfaces of the water-controlling core balls, the water-controlling core balls on the inner layers have excellent water absorption capacity, pond sludge has good water retention and seepage resistance capacity, absorbed water is effectively stored, the water-controlling core balls are arranged into hollow structures to provide sufficient water storage space and provide space for montmorillonite expansion, and the added straw powder strengthens the strength of the water-absorbing core balls, so that the water-absorbing core balls can keep shapes for a long time, and can continuously retain water and release fertilizer efficiency; pond sludge is used as a raw material in the water control core ball, the humic acid liquid fertilizer is utilized to bond the compound fertilizer powder on the surface layer of the water control core ball, humic acid in the humic acid liquid fertilizer has a good fixing effect on the surface layer fertilizer in the early stage of use, the fertilizer efficiency is prevented from losing to the bottom soil, the fertilizer collapses in the later stage, and humic acid contained in the inside pond sludge continuously fixes the fertilizer efficiency.
Description
Technical Field
The invention belongs to the technical field of fertilizers, and particularly relates to a humic acid water-soluble fertilizer and a preparation method thereof.
Background
The slow release fertilizer can change the traditional fertilizing mode, can realize one-time fertilization on various crops, does not need additional fertilization, simplifies the fertilizing procedure, and leads the sowing and the fertilization to be carried out synchronously, thereby greatly reducing the agricultural labor intensity and improving the labor productivity. The slow-release long-acting fertilizer has the advantages of slow-release long-acting effect, greatly improving the utilization rate of the fertilizer, saving resources on the same yield level of the same crop, reducing the using amount of the fertilizer, lowering the cost and increasing the income of farmers.
Disclosure of Invention
In order to solve the technical problems mentioned in the background technology, the invention provides a humic acid water-soluble fertilizer and a preparation method thereof.
The purpose of the invention can be realized by the following technical scheme:
a humic acid water-soluble fertilizer comprises a water control core ball, wherein a compound fertilizer grain layer is adhered to the surface of the water control core ball;
the water control core ball comprises the following raw materials in parts by weight: 15-20 parts of pond sludge, 8-15 parts of montmorillonite, 3-5 parts of straw powder, 10-15 parts of organic fertilizer, 0.7-1.1 parts of sodium carboxymethylcellulose and 28-36 parts of water;
the water control core ball is prepared by the following steps:
step A1: adding two-thirds of montmorillonite, all pond sludge and sodium carboxymethylcellulose into a stirrer for uniform mixing, slowly adding all water in the stirrer for stirring and mixing in a stirring state, adding water for stirring after mixing powder materials to prevent the pond sludge from caking due to high viscosity, and causing the problem of uneven components in the water control core ball, then sealing and standing for 5-10h, fully absorbing water by the pond sludge and the montmorillonite, dispersing the sodium carboxymethylcellulose in the mixed sludge to form colloid, and increasing the viscosity of the mixed sludge;
step A2: adding organic fertilizer and straw powder into the mixed mud, stirring and mixing uniformly, then adding the residual montmorillonite, stirring and collecting water to prepare a wet material;
step A3: adding the wet material into a hollow extruder, extruding, cutting, and then falling into a balling disk to prepare the hollow water-control core ball with the particle size of 1-1.5 cm.
Furthermore, pond sludge is pond sediment, fish excrement and feed are deposited, decayed and fermented, a large amount of humic acid is contained in the pond sediment, and the humic acid is added into the water control core ball, so that on one hand, the good water retention property of the humic acid is utilized to facilitate water storage, on the other hand, culture pollutants are fully utilized and added into fertilizer to serve as base fertilizer to be buried in soil, the fertilizer efficiency is improved, and peculiar smell is prevented from being emitted.
Further, the pond sludge is subjected to filter pressing through a filter press, more than 60% of water is pressed out to destroy the colloidal state of the pond sludge, and then the pond sludge is naturally dried and crushed into powder, so that the pond sludge is conveniently mixed with other batch materials, and the uniformity of all the raw materials is ensured.
Further, the organic fertilizer is prepared by mixing decomposed chicken manure, decomposed pig manure and decomposed cow manure according to any proportion, drying and grinding into powder.
Further, the straw powder is corn stalk, rolls after drying corn stalk earlier, flattens corn stalk, later smashes into the powder that length is not higher than 3mm through the rubbing crusher, contains a large amount of fibers in the corn stalk powder, and it fills plays the stiffening effect in accuse water core ball for accuse water core ball keeps the form to be difficult for collapsing, continuously keeps the function of moisturizing.
The compound fertilizer grain layer comprises 4-6 parts of humic acid liquid fertilizer, 8-15 parts of urea, 5-10 parts of calcium superphosphate and 5-10 parts of potassium carbonate according to parts by weight, and the urea, the calcium superphosphate and the potassium carbonate are crushed into powder with the fineness not more than 80 meshes and mixed to prepare compound fertilizer powder.
A preparation method of a humic acid water-soluble fertilizer specifically comprises the following steps:
step S1: taking two-thirds of compound fertilizer powder in a pan forming machine, spraying humic acid liquid fertilizer with half of the amount on the surface of a water control core ball in a spraying mode, then falling into the pan forming machine for rolling granulation, adhering a layer of compound fertilizer powder on the surface of the water control core ball, repeating the above operations, and adhering the rest compound fertilizer powder on the surface of the water control core ball through the humic acid liquid fertilizer in the pan forming machine to prepare fertilizer wet granules;
step S2: drying the wet fertilizer granules at 55-60 ℃ for 10-15min, quickly evaporating water in the water control core ball to increase the internal pressure of the water control core ball, and forming a plurality of air holes due to the fact that a plurality of gaps exist among the compound fertilizer powder, wherein internal water vapor overflows from the gaps to be beneficial to subsequent drying, and on the other hand, in the using process, water is absorbed by the water control core ball from the air holes to dissolve out nutrients, plant transpiration absorbs dissolved water containing a large amount of nutrients, and then drying is carried out at the temperature of not more than 30 ℃ until the water content of the dissolved water is not more than 10% to obtain the humic acid water-soluble fertilizer.
The invention has the beneficial effects that:
1. the humic acid water-soluble fertilizer disclosed by the invention has a core-spun structure, wherein montmorillonite is adopted as a water absorbing material in a water control core ball at an inner layer, the water absorbing capacity can reach multiple times of the self volume, the humic acid water-soluble fertilizer has excellent water absorbing capacity, pond sludge is added, the humic acid water-soluble fertilizer has good water retention and anti-permeability capacity, the absorbed water is effectively stored, in addition, the water control core ball is arranged to be a hollow structure, a sufficient water storage space is provided, a space is provided for montmorillonite expansion, the added straw powder strengthens the strength of the water absorbing core ball, the water absorbing core ball is enabled to keep the shape for a long time, and the water retention and fertilizer release effects are sustained.
2. According to the invention, pond sludge is used as a raw material in the water-control core ball, the humic acid liquid fertilizer is used for bonding the compound fertilizer powder on the surface layer of the water-control core ball, the water-control core ball effectively supplies nutrient components to plants in the processes of water absorption and water release, humic acid in the humic acid liquid fertilizer at the early stage has a good fixing effect on surface layer fertilizer, the fertilizer efficiency is prevented from losing to the bottom soil, the fertilizer collapses at the later stage, and humic acid in the pond sludge is continuously used for fixing the fertilizer efficiency, so that the nutrient components in the fertilizer prepared by the method are fully utilized.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the examples:
the humic acid liquid fertilizer is provided by Shanghai Tong microbial technology limited;
urea, calcium superphosphate and potassium carbonate are commercially available fertilizers;
the pond sludge is bottom sludge cleaned in a certain aquaculture pond of Anhui province, the pond sludge is firstly subjected to filter pressing by a filter press, then naturally dried in the sun, finally crushed into powder and sieved by a 20-mesh sieve;
the straw powder is corn straw, the corn straw is dried and rolled, the corn straw is rolled, then the corn straw is crushed by a crusher, and then the crushed corn straw is sieved by a 3mm screen mesh.
Example 1
The embodiment of the preparation of the water control core ball comprises the following specific implementation processes:
preparation before implementation: weighing 15kg of pond sludge, 15kg of montmorillonite, 3kg of straw powder, 15kg of organic fertilizer, 0.7kg of sodium carboxymethylcellulose and 36kg of water;
step A1: adding two-thirds of montmorillonite, all pond sludge and sodium carboxymethylcellulose into a stirrer for uniform mixing, slowly adding all water in the stirrer for stirring and mixing in a stirring state, adding water for stirring after powder mixing to prevent the pond sludge from caking due to high viscosity, and causing the problem of uneven components in the water-controlling core ball, then sealing and standing for 5 hours, fully absorbing water by the pond sludge and the montmorillonite, dispersing the sodium carboxymethylcellulose in the mixed sludge to form colloid, and increasing the viscosity of the mixed sludge;
step A2: adding organic fertilizer and straw powder into the mixed mud, stirring and mixing uniformly, then adding the residual montmorillonite, stirring and collecting water to prepare a wet material;
step A3: adding the wet material into a hollow extruder, extruding, cutting, and then falling into a balling disk to prepare the hollow water-control core ball with the particle size of 1-1.5 cm.
Example 2
The embodiment of the preparation of the water control core ball comprises the following specific implementation processes:
preparation before implementation: weighing 18kg of pond sludge, 12kg of montmorillonite, 4kg of straw powder, 12kg of organic fertilizer, 0.9kg of sodium carboxymethylcellulose and 32kg of water;
step A1: adding two-thirds of montmorillonite, all pond sludge and sodium carboxymethylcellulose into a stirrer for uniform mixing, slowly adding all water in the stirrer for stirring and mixing in a stirring state, adding water for stirring after powder mixing to prevent the pond sludge from caking due to high viscosity, and causing the problem of uneven components in the water-controlling core ball, then sealing and standing for 8 hours, fully absorbing water by the pond sludge and the montmorillonite, dispersing the sodium carboxymethylcellulose in the mixed sludge to form colloid, and increasing the viscosity of the mixed sludge;
step A2: adding organic fertilizer and straw powder into the mixed mud, stirring and mixing uniformly, then adding the residual montmorillonite, stirring and collecting water to prepare a wet material;
step A3: adding the wet material into a hollow extruder, extruding, cutting, and then falling into a balling disk to prepare the hollow water-control core ball with the particle size of 1-1.5 cm.
Example 3
The embodiment of the preparation of the water control core ball comprises the following specific implementation processes:
preparation before implementation: weighing 20kg of pond sludge, 8kg of montmorillonite, 5kg of straw powder, 15kg of organic fertilizer, 1.1kg of sodium carboxymethylcellulose and 28kg of water;
step A1: adding two-thirds of montmorillonite, all pond sludge and sodium carboxymethylcellulose into a stirrer for uniform mixing, slowly adding all water in the stirrer for stirring and mixing in a stirring state, adding water for stirring after powder mixing to prevent the pond sludge from caking due to high viscosity, and causing the problem of uneven components in the water-controlling core ball, then sealing and standing for 10h, fully absorbing water by the pond sludge and the montmorillonite, dispersing the sodium carboxymethylcellulose in the mixed sludge to form colloid, and increasing the viscosity of the mixed sludge;
step A2: adding organic fertilizer and straw powder into the mixed mud, stirring and mixing uniformly, then adding the residual montmorillonite, stirring and collecting water to prepare a wet material;
step A3: adding the wet material into a hollow extruder, extruding, cutting, and then falling into a balling disk to prepare the hollow water-control core ball with the particle size of 1-1.5 cm.
Example 4
The embodiment of the preparation of the humic acid water-soluble fertilizer comprises the following specific implementation processes:
preparation before implementation: weighing 4kg of humic acid liquid fertilizer for later use, weighing 8kg of urea, 10kg of calcium superphosphate and 10kg of potassium carbonate, adding the urea, the calcium superphosphate and the potassium carbonate into a grinder, repeatedly grinding the mixture until the mixture is completely sieved by a 80-mesh screen, and then adding the mixture into a stirrer to be mixed to prepare compound fertilizer powder;
step S1: taking two-thirds of compound fertilizer powder in a pan forming machine, spraying humic acid liquid fertilizer with half of the amount on the surface of a water control core ball in a spraying mode, then falling into the pan forming machine for rolling granulation, adhering a layer of compound fertilizer powder on the surface of the water control core ball, repeating the above operations, and adhering the rest compound fertilizer powder on the surface of the water control core ball through the humic acid liquid fertilizer to prepare fertilizer wet granules;
step S2: the wet fertilizer granules are dried for 15min at 55 ℃, moisture in the water control core ball is evaporated rapidly, so that the internal pressure of the water control core ball is increased, as more gaps exist among the compound fertilizer powder, internal water vapor overflows from the gaps to form a plurality of air holes, on one hand, the subsequent drying is facilitated, on the other hand, in the use process, the moisture is absorbed by the water control core ball from the air holes to dissolve out nutrients, the plant transpiration absorbs the dissolved water containing a large amount of nutrients, and then the wet fertilizer granules are dried at 30 ℃ until the water content is 10%, so that the humic acid water-soluble fertilizer is obtained.
Example 5
The embodiment of the preparation of the humic acid water-soluble fertilizer comprises the following specific implementation processes:
preparation before implementation: weighing 5kg of humic acid liquid fertilizer for later use, weighing 15kg of urea, 8kg of calcium superphosphate and 8kg of potassium carbonate, adding the mixture into a grinder, repeatedly grinding the mixture until the mixture is completely sieved by a 80-mesh screen, and then adding the mixture into a stirrer to mix the mixture to prepare compound fertilizer powder;
step S1: taking two-thirds of compound fertilizer powder in a pan forming machine, spraying humic acid liquid fertilizer with half of the amount on the surface of a water control core ball in a spraying mode, then falling into the pan forming machine for rolling granulation, adhering a layer of compound fertilizer powder on the surface of the water control core ball, repeating the above operations, and adhering the rest compound fertilizer powder on the surface of the water control core ball through the humic acid liquid fertilizer to prepare fertilizer wet granules;
step S2: the wet fertilizer granules are dried for 10min at 60 ℃, moisture in the water control core ball is quickly evaporated, so that the internal pressure of the water control core ball is increased, and because more gaps exist among the compound fertilizer powder, internal water vapor overflows from the gaps to form a plurality of air holes, so that the subsequent drying is facilitated on one hand, and on the other hand, in the use process, the moisture is absorbed by the water control core ball from the air holes to dissolve out nutrients, the plant transpiration absorbs the dissolved water containing a large amount of nutrients, and then the wet fertilizer granules are dried at 30 ℃ until the water content is 10%, so that the humic acid water-soluble fertilizer is obtained.
Example 6
The embodiment of the preparation of the humic acid water-soluble fertilizer comprises the following specific implementation processes:
preparation before implementation: weighing 6kg of humic acid liquid fertilizer for later use, weighing 15kg of urea, 5kg of calcium superphosphate and 5kg of potassium carbonate, adding the materials into a grinder, repeatedly grinding the materials until the materials are completely sieved by a 80-mesh screen, and then adding the materials into a stirrer to be mixed to prepare compound fertilizer powder;
step S1: taking two-thirds of compound fertilizer powder in a pan forming machine, spraying humic acid liquid fertilizer with half of the amount on the surface of a water control core ball in a spraying mode, then falling into the pan forming machine for rolling granulation, adhering a layer of compound fertilizer powder on the surface of the water control core ball, repeating the above operations, and adhering the rest compound fertilizer powder on the surface of the water control core ball through the humic acid liquid fertilizer to prepare fertilizer wet granules;
step S2: the wet fertilizer granules are dried for 15min at 60 ℃, moisture in the water control core ball is evaporated rapidly, so that the internal pressure of the water control core ball is increased, as more gaps exist among the compound fertilizer powder, internal water vapor overflows from the gaps to form a plurality of air holes, on one hand, the subsequent drying is facilitated, on the other hand, in the use process, the moisture is absorbed by the water control core ball from the air holes to dissolve out nutrients, the plant transpiration absorbs the dissolved water containing a large amount of nutrients, and then the wet fertilizer granules are dried at 30 ℃ until the water content is 10%, so that the humic acid water-soluble fertilizer is obtained.
Comparative example 1
The comparative example is a commercially available acrylic water-retaining base fertilizer.
Taking 1kg of the humic acid water-soluble fertilizer prepared in example 4-example 6 and 1kg of the base fertilizer purchased in comparative example 1, placing the fertilizers in a filter screen, taking 5L of water respectively, pulling up the filter screen after soaking for one day, draining for half a day, repeatedly carrying out for 10 days, simulating repeated water absorption of plants, measuring the content of nitrogen, phosphorus and potassium elements in leachate, wherein the specific data are shown in table 1:
TABLE 1
As can be seen from Table 1, the contents of nutrients beneficial to plant growth extracted under the same conditions in examples 4-6 are higher than those in comparative example 1, which is benefited from the fact that the fertilizer prepared by the present invention has a double-layer structure, and pores are generated on the compound fertilizer layer by using a suitable drying method, so that water channels are formed, water absorption and water release are facilitated, and then the nutrients are extracted.
The tomato is planted by taking the base fertilizers of the examples 4-6 and the comparative example 1, the plant height, the plant diameter and the number of the results in the fruit setting period are counted, the total weight of the results is shown in the following table 2:
TABLE 2
| Plant height/m | Plant diameter/mm | Number of results/number | The result being total weight/kg | |
| Example 4 | 1.15 | 19.4 | 12 | 2.32 |
| Example 5 | 1.07 | 21.1 | 14 | 2.41 |
| Example 6 | 1.21 | 18.5 | 15 | 2.36 |
| Comparative example 1 | 0.92 | 14.3 | 9 | 1.61 |
As can be seen from Table 2, the fertilizers prepared in examples 4-6 were used to grow strong tomato plants, and the number and yield of the tomato plants were significantly better than those of comparative example 1.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing is illustrative and explanatory only and is not intended to be exhaustive or to limit the invention to the precise embodiments described, and various modifications, additions, and substitutions may be made by those skilled in the art without departing from the scope of the invention or exceeding the scope of the claims.
Claims (6)
1. The humic acid water-soluble fertilizer is characterized by comprising a water control core ball, wherein a compound fertilizer granule layer is adhered to the surface of the water control core ball;
the water control core ball comprises the following raw materials in parts by weight: 15-20 parts of pond sludge, 8-15 parts of montmorillonite, 3-5 parts of straw powder, 10-15 parts of organic fertilizer, 0.7-1.1 parts of sodium carboxymethylcellulose and 28-36 parts of water;
the water control core ball is prepared by the following steps:
step A1: mixing two thirds of montmorillonite, all pond sludge and sodium carboxymethylcellulose, adding all water, stirring and mixing, sealing and standing for 5-10h, and absorbing water to obtain mixed sludge;
step A2: adding organic fertilizer and straw powder into the mixed mud, stirring and mixing uniformly, then adding the residual montmorillonite, stirring and collecting water to prepare a wet material;
step A3: adding the wet material into a hollow extruder, extruding, cutting, and then falling into a balling disk to prepare the hollow water-control core ball with the particle size of 1-1.5 cm.
2. The humic acid water-soluble fertilizer according to claim 1, wherein the pond sludge is fishpond sediment and is in a dry powder form.
3. The humic acid water-soluble fertilizer as claimed in claim 1, wherein the organic fertilizer is prepared by mixing decomposed chicken manure, decomposed pig manure and decomposed cattle manure according to any proportion, drying and grinding into powder.
4. The humic acid water-soluble fertilizer as claimed in claim 1, wherein the straw powder is corn straw, and the corn straw is dried, rolled and crushed to obtain powder with a length of not more than 3 mm.
5. The humic acid water-soluble fertilizer as claimed in claim 1, wherein the compound fertilizer granule layer comprises 4-6 parts of humic acid liquid fertilizer, 8-15 parts of urea, 5-10 parts of calcium superphosphate and 5-10 parts of potassium carbonate by weight, and the urea, the calcium superphosphate and the potassium carbonate are crushed into powder with fineness not more than 80 meshes and mixed to prepare compound fertilizer powder.
6. The preparation method of the humic acid water-soluble fertilizer as claimed in claim 5, which is characterized by comprising the following steps:
step S1: taking two-thirds of compound fertilizer powder in a pan forming machine, spraying humic acid liquid fertilizer with half of the amount on the surface of a water control core ball in a spraying mode, then falling into the pan forming machine for rolling granulation, adhering a layer of compound fertilizer powder on the surface of the water control core ball, repeating the above operations, and adhering the rest compound fertilizer powder on the surface of the water control core ball through the humic acid liquid fertilizer in the pan forming machine to prepare fertilizer wet granules;
step S2: drying the wet fertilizer granules at 55-60 ℃ for 10-15min, and then drying at the temperature of not more than 30 ℃ until the water content is not more than 10% to obtain the humic acid water-soluble fertilizer.
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| CN106396973A (en) * | 2016-10-20 | 2017-02-15 | 北京林业大学 | Film-coated long-acting slow release fertilizer and preparation method thereof |
| CN106748520A (en) * | 2017-01-09 | 2017-05-31 | 闾传道 | A kind of highly-water-soluble humic acid binder and preparation method thereof |
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| CN108863685A (en) * | 2017-05-11 | 2018-11-23 | 湖北富之源生物科技有限公司 | A kind of Humic acid synergistic type slow-release compound fertilizer particle |
| CN107311768A (en) * | 2017-07-26 | 2017-11-03 | 望江县乡缘农业有限责任公司 | A kind of spherical porous high degradable paddy rice compound organic fertilizer of sustained release |
| CN108623393A (en) * | 2018-07-03 | 2018-10-09 | 泰州职业技术学院 | Double-deck coating water conservation sustained-controll-release fertiliser and preparation method thereof |
| CN109438057A (en) * | 2018-11-30 | 2019-03-08 | 合肥智上农业开发有限公司 | A kind of humic acid composite material and preparation method thereof |
| CN110734328A (en) * | 2019-09-29 | 2020-01-31 | 云南云叶化肥股份有限公司 | humic acid bio-organic fertilizer with water retention function and preparation method thereof |
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