Loss-preventing organic fertilizer and production method thereof

Abstract

The invention provides an anti-loss organic fertilizer which comprises an inner layer, a middle layer and an outer layer which are sequentially arranged from inside to outside, the inner layer is an organic fertilizer layer, the middle layer is an adhesive layer, the outer layer is a slow release layer, a plurality of supporting strips are arranged between the middle layer and the outer layer, and the part, located outside the middle layer, of each supporting strip is further wrapped with an expansion layer. The invention further provides a production method of the loss-preventing organic fertilizer. The production method comprises the steps of organic fertilizer granulation, supporting strip wrapping, expansion layer processing and integral forming. The expansion layer absorbs water, expands, becomes long and thick, and forms a branch structure extending out of the surface of the inner layer, so that the expansion layer is clamped in soil, is not easy to move due to factors such as soil turning and rain wash, can be kept in an original fertilization position for a long time, and continuously provides fertilizer efficiency for a farmland; in this way, the problem that a large amount of organic fertilizer which is not completely decomposed is scoured and gathered together, and then underground water is polluted is solved.

Description

Technical Field

[0001] The invention relates to the technical field of organic fertilizer production, and in particular to an anti-loss organic fertilizer and a production method thereof. Background Art

[0002] Chemical fertilizers have laid a material foundation for the production and development of modern agriculture and for ensuring human food security. However, the low utilization rate of chemical fertilizers and the resulting high environmental risks have always been a major problem that has plagued the world. At present, due to the growth of agricultural and fertilizer use worldwide, the dependence on pesticides and fertilizers has increased, resulting in a series of problems such as insufficient use of organic fertilizers, imbalance of soil nutrient ratios, soil compaction, soil quality decline, and river and groundwater pollution. To develop a new "sustainable development" agriculture, it is necessary to reduce the use of pesticides and fertilizers and find effective alternatives.

[0003] At present, countries around the world are actively exploring ways and means to improve fertilizer utilization and curb environmental pollution. In recent years, the above goals have been achieved mainly by changing nutrient release characteristics and improving fertilizer functions. One is to improve fertilizer efficiency and reduce pollution by modifying fertilizer nutrient release patterns; the other is to increase the use of organic fertilizers, improve fertilizer efficiency and reduce pollution. In particular, the research and development of slow-release fertilizers and organic fertilizers has become a hot topic.

[0004] For example, the Chinese invention patent with the publication number CN117247300A proposes a preparation method and application of an organic-inorganic micro-particle compound fertilizer, including a slow-release layer and a quick-release layer arranged in sequence from the inside to the outside; the quick-release layer includes the following components by weight: 4-6 parts of nitrogen-potassium compound fertilizer, 1-5 parts of dipotassium hydrogen phosphate, 8-10 parts of urea, 0.4-0.5 parts of boric acid, 0.3-0.5 parts of EDTA-Fe, and 0.1-0.2 parts of starch; the slow-release layer includes the following components by weight: 7-10 parts of formaldehyde urea, 10-20 parts of trehalose-modified humic acid, and 0.4-0.5 parts of slow-release acid-regulating substances. Through the two-step granulation of the quick-release layer and the slow-release layer, the mixed use of a large number of elements is avoided, the soil compaction and fertility reduction are prevented, the fertility utilization rate is further improved, and the fertilizer effect time is further increased.

[0005] That is, in the prior art, inorganic fertilizers are mainly used as quick-release layers, and organic fertilizers are used as slow-release layers, and the slow-release layer is wrapped around the quick-release layer, so as to achieve the effect of combining organic and inorganic fertilizers, and at the same time releasing fertility for a long time and with high efficiency through the slow-release effect. However, there are certain problems in the actual use of this method, that is, fertilizers with multi-layer slow-release structures require a long time to release fertility, which can be up to several months or even more than a year. During this long period of time, with the influence of factors such as crop planting and rain erosion, it is easy for fertilizer particles to leave the original release position before being fully released, making it difficult to achieve the effect of long-term fertility release, affecting subsequent planting. At the same time, they may also gather together due to rain erosion and aggregation, thereby polluting groundwater. Summary of the invention

[0006] In view of the deficiencies in the prior art, the present invention provides an anti-loss organic fertilizer and a production method thereof, which solves the problem in the prior art that the slow-release fertilizer leaves the original fertilization position due to the influence of factors such as crop planting and rain erosion, resulting in the fertilizer effect not being able to function normally and possibly polluting groundwater.

[0007] In a first aspect, the present invention proposes an anti-loss organic fertilizer, which is a spherical particle, including an inner layer, a middle layer and an outer layer arranged in sequence from the inside to the outside, the inner layer is an organic fertilizer layer, the middle layer is an adhesive layer, the outer layer is a slow-release layer, and a plurality of support strips are provided between the middle layer and the outer layer, the support strips are elongated elastic strip structures, and the part of the support strips located outside the middle layer is also wrapped with an expansion layer, and the expansion layer expands after absorbing water.

[0008] Preferably, the material of the adhesive layer includes one of starch glue, sodium lignin sulfonate and sodium carboxymethyl cellulose.

[0009] Preferably, the sustained-release layer comprises the following ingredients calculated by weight: 60-70 parts of corn starch, 15-27 parts of cassava starch, and 40-50 parts of compound fertilizer.

[0010] Preferably, the support strip is made of one of polylactic acid, polyhydroxyalkanoate or kraft paper.

[0011] Preferably, the expansion layer comprises one of a water-absorbing resin or a water-swellable rubber.

[0012] Preferably, the compound fertilizer comprises the following components calculated by weight: 20-22 parts of urea, 28-29 parts of monoammonium phosphate, and 15-18 parts of potassium nitrate.

[0013] In a second aspect, the present invention further proposes a method for producing an anti-loss organic fertilizer, comprising the following steps:

[0014] S1, organic fertilizer granulation: putting the pre-processed organic fertilizer powder into the first granulator, adding water to moisten and granulate to obtain organic fertilizer granules;

[0015] S2, wrapping with support strips: putting the organic fertilizer particles into the first disc mixer, adding the liquid adhesive and starting to mix, so that the adhesive is evenly covered on the surface of the organic fertilizer particles, then putting in the support strips, and continuing to mix so that the support strips are evenly attached to the surface of the organic fertilizer particles, until the adhesive is solidified, to obtain burr-shaped particles;

[0016] S3, expansion layer processing: heating the expansion layer to melt it into a liquid state, and then adding it into the second disc mixer, then adding the burr-shaped particles into the second disc mixer, starting to mix so that the burr-shaped particles roll on the surface of the liquid expansion layer, allowing the expansion layer to adhere to the surface of the support strip, and then outputting the burr-shaped particles that have been adhered and cooling so that the expansion layer solidifies;

[0017] S4, overall forming: the burr-shaped particles with the expansion layer are put into the second granulator, the slow-release layer raw materials are added, and then water is added to moisten and granulate to obtain the desired organic fertilizer granule product.

[0018] Furthermore, in the steps S1 and S4, the first granulator and the second granulator are disc granulators with a rotation speed of 12-15 r / min.

[0019] Furthermore, in the steps S1 and S4, the temperature is maintained at 50-55° C. during the granulation process.

[0020] Furthermore, in step S3, the total thickness of the liquid expansion layer added to the second disc mixer is not greater than the radial length of the support strips on the surface of the burr-shaped particles, so that when the burr-shaped particles roll, only the support strips are in contact with the expansion layer.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. The organic fertilizer of the present invention has an outer slow-release layer and an inner organic fertilizer layer. The slow-release layer is doped with composite fertilizer in materials such as corn starch and cassava starch that can be slowly decomposed, so that organic substances such as corn starch and cassava starch are decomposed by microorganisms in the soil. While providing organic energy, the composite fertilizer is also used to specifically supplement the nutrients required for plant growth, ensuring that the initial stage of fertilizer addition can play an effective fertilization effect; and the internal organic fertilizer layer is finally released, and can stay in the soil for a long time, and the continuous application of fertilizer effect plays an effect of improving soil quality;

[0023] 2. In the present invention, a support bar is connected to the outside of the inner layer through an adhesive layer, and the outside of the support bar is wrapped and covered with an expansion layer. When the slow-release layer is gradually decomposed to allow the expansion layer to contact the moisture in the soil, the expansion layer absorbs water and expands rapidly, becoming longer and thicker, thereby forming a branch structure extending from the surface of the inner layer. As the expansion layer expands, the support bar penetrates and is stuck in the soil. Therefore, it is not easy to move due to factors such as soil turning and rain erosion, and can be retained in the original fertilization position for a long time to continuously provide fertilizer effect for the farmland; in this way, a large amount of incompletely decomposed organic fertilizer will not be washed and gathered together, thereby polluting groundwater;

[0024] 3. In the present invention, except for the inner layer and the outer layer, the adhesive layer, the support strips, the expansion layer and other structures are all made of degradable organic materials, so they can be quickly decomposed by microorganisms in the soil, which will not only not pollute the land, but also continuously provide organic nutrients to further improve the soil quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a cross-sectional schematic diagram of an embodiment of the present invention.

[0026] Figure 2 Schematic diagram of the specific structure of the support strip and the expansion layer in the embodiment of the present invention.

[0027] In the above drawings: 1. organic fertilizer layer; 2. adhesive layer; 3. sustained-release layer; 4. support bar; 5. expansion layer. DETAILED DESCRIPTION

[0028] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0029] like Figure 1 , Figure 2 As shown, an embodiment of the present invention provides an anti-loss organic fertilizer, which is a spherical particle, including an inner layer, a middle layer and an outer layer arranged in sequence from the inside to the outside, the inner layer is an organic fertilizer layer 1, the middle layer is an adhesive layer 2, and the outer layer is a slow-release layer 3. There are several support bars 4 between the middle layer and the outer layer, and the support bars 4 are elongated elastic strip structures. The part of the support bars 4 located outside the middle layer is also wrapped with an expansion layer 5, and the expansion layer 5 expands after absorbing water.

[0030] Embodiment 1:

[0031] In this embodiment, the inner layer uses an organic fertilizer raw material obtained by fermenting a mixture of bran and straw in equal proportions.

[0032] The material of the adhesive layer 2 is starch glue.

[0033] The sustained-release layer 3 includes the following components calculated by weight: 60 parts of corn starch, 15 parts of cassava starch, and 40 parts of compound fertilizer, wherein the compound fertilizer includes the following components calculated by weight: 20 parts of urea, 28 parts of monoammonium phosphate, and 15 parts of potassium nitrate.

[0034] The support bar 4 is made of polylactic acid.

[0035] The expansion layer 5 is a water-absorbing resin, specifically a starch-acrylic acid graft polymer.

[0036] The production method of the anti-loss organic fertilizer in the present embodiment comprises the following steps:

[0037] S1. Organic fertilizer granulation: the pre-processed organic fertilizer powder is put into the first granulator, moistened with water and granulated to obtain organic fertilizer granules.

[0038] S2, wrapping with support strips 4: putting the organic fertilizer particles into the first disc mixer, adding the liquid adhesive and starting to mix, so that the adhesive is evenly covered on the surface of the organic fertilizer particles, then putting in the support strips 4, and continuing to mix so that the support strips 4 are evenly attached to the surface of the organic fertilizer particles, until the adhesive is solidified to obtain burr-shaped particles.

[0039] S3, expansion layer 5 processing: heat the expansion layer 5 to melt it into liquid, and then add it into the second disc mixer, and the total thickness of the liquid expansion layer 5 is not greater than the radial length of the support strip 4 on the surface of the burr-shaped particles, so that when the burr-shaped particles roll, only the support strip 4 is in contact with the expansion layer 5, and then the burr-shaped particles are put into the second disc mixer, and mixing begins to make the burr-shaped particles roll on the surface of the liquid expansion layer 5, so that the expansion layer 5 adheres to the surface of the support strip 4, and then the burr-shaped particles that have been attached are output and cooled to solidify the expansion layer 5.

[0040] S4, integral molding: the burr-shaped particles with the expansion layer 5 are put into the second granulator, the raw materials of the slow-release layer 3 are added, and then water is added to moisten and granulate to obtain the desired organic fertilizer granule product.

[0041] In steps S1 and S4, the first granulator and the second granulator are disc granulators with a rotation speed of 12 r / min. The temperature is maintained at 50° C. during the granulation process.

[0042] Embodiment 2:

[0043] In this embodiment, the inner layer uses an organic fertilizer raw material obtained by fermenting a mixture of bran and straw in equal proportions.

[0044] The material of the adhesive layer 2 is sodium lignin sulfonate.

[0045] The sustained-release layer 3 includes the following components calculated by weight: 65 parts of corn starch, 20 parts of cassava starch, and 45 parts of compound fertilizer, wherein the compound fertilizer includes the following components calculated by weight: 21 parts of urea, 28.5 parts of monoammonium phosphate, and 16 parts of potassium nitrate.

[0046] The material of the support bar 4 is polyhydroxyalkanoate.

[0047] The expansion layer 5 is water-swellable rubber (WSR).

[0048] The production method of the anti-loss organic fertilizer in the present embodiment comprises the following steps:

[0049] S1. Organic fertilizer granulation: the pre-processed organic fertilizer powder is put into the first granulator, moistened with water and granulated to obtain organic fertilizer granules.

[0050] S2, wrapping with support strips 4: putting the organic fertilizer particles into the first disc mixer, adding the liquid adhesive and starting to mix, so that the adhesive is evenly covered on the surface of the organic fertilizer particles, then putting in the support strips 4, and continuing to mix so that the support strips 4 are evenly attached to the surface of the organic fertilizer particles, until the adhesive is solidified to obtain burr-shaped particles.

[0051] S3, expansion layer 5 processing: heat the expansion layer 5 to melt it into liquid, and then add it into the second disc mixer, and the total thickness of the liquid expansion layer 5 is not greater than the radial length of the support strip 4 on the surface of the burr-shaped particles, so that when the burr-shaped particles roll, only the support strip 4 is in contact with the expansion layer 5, and then the burr-shaped particles are put into the second disc mixer, and mixing begins to make the burr-shaped particles roll on the surface of the liquid expansion layer 5, so that the expansion layer 5 adheres to the surface of the support strip 4, and then the burr-shaped particles that have been attached are output and cooled to solidify the expansion layer 5.

[0052] S4, integral molding: the burr-shaped particles with the expansion layer 5 are put into the second granulator, the raw materials of the slow-release layer 3 are added, and then water is added to moisten and granulate to obtain the desired organic fertilizer granule product.

[0053] In steps S1 and S4, the first granulator and the second granulator are disc granulators with a rotation speed of 14 r / min. The temperature is maintained at 53° C. during the granulation process.

[0054] Embodiment 3:

[0055] In this embodiment, the inner layer uses an organic fertilizer raw material obtained by fermenting a mixture of bran and straw in equal proportions.

[0056] The material of the adhesive layer 2 is sodium carboxymethyl cellulose.

[0057] The sustained-release layer 3 includes the following components calculated by weight: 70 parts of corn starch, 27 parts of cassava starch, and 50 parts of compound fertilizer, wherein the compound fertilizer includes the following components calculated by weight: 22 parts of urea, 29 parts of monoammonium phosphate, and 18 parts of potassium nitrate.

[0058] The support strip 4 is made of kraft paper.

[0059] The expansion layer 5 is water-swellable rubber (WSR).

[0060] The production method of the anti-loss organic fertilizer in the present embodiment comprises the following steps:

[0061] S1. Organic fertilizer granulation: the pre-processed organic fertilizer powder is put into the first granulator, moistened with water and granulated to obtain organic fertilizer granules.

[0062] S2, wrapping with support strips 4: putting the organic fertilizer particles into the first disc mixer, adding the liquid adhesive and starting to mix, so that the adhesive is evenly covered on the surface of the organic fertilizer particles, then putting in the support strips 4, and continuing to mix so that the support strips 4 are evenly attached to the surface of the organic fertilizer particles, until the adhesive is solidified to obtain burr-shaped particles.

[0063] S3, expansion layer 5 processing: heat the expansion layer 5 to melt it into liquid, and then add it into the second disc mixer, and the total thickness of the liquid expansion layer 5 is not greater than the radial length of the support strip 4 on the surface of the burr-shaped particles, so that when the burr-shaped particles roll, only the support strip 4 is in contact with the expansion layer 5, and then the burr-shaped particles are put into the second disc mixer, and mixing begins to make the burr-shaped particles roll on the surface of the liquid expansion layer 5, so that the expansion layer 5 adheres to the surface of the support strip 4, and then the burr-shaped particles that have been attached are output and cooled to solidify the expansion layer 5.

[0064] S4, integral molding: the burr-shaped particles with the expansion layer 5 are put into the second granulator, the raw materials of the slow-release layer 3 are added, and then water is added to moisten and granulate to obtain the desired organic fertilizer granule product.

[0065] In steps S1 and S4, the first granulator and the second granulator are disc granulators with a rotation speed of 15 r / min. The temperature is maintained at 55° C. during the granulation process.

[0066] Embodiment 4:

[0067] In this embodiment, the inner layer uses an organic fertilizer raw material obtained by fermenting a mixture of bran and straw in equal proportions.

[0068] The material of the adhesive layer 2 is starch glue.

[0069] The sustained-release layer 3 includes the following components calculated by weight: 60 parts of corn starch, 27 parts of cassava starch, and 50 parts of compound fertilizer, wherein the compound fertilizer includes the following components calculated by weight: 22 parts of urea, 28 parts of monoammonium phosphate, and 15 parts of potassium nitrate.

[0070] The support bar 4 is made of polylactic acid.

[0071] The expansion layer 5 is water-swellable rubber (WSR).

[0072] The production method of the anti-loss organic fertilizer in the present embodiment comprises the following steps:

[0073] S1. Organic fertilizer granulation: the pre-processed organic fertilizer powder is put into the first granulator, moistened with water and granulated to obtain organic fertilizer granules.

[0074] S2, wrapping with support strips 4: putting the organic fertilizer particles into the first disc mixer, adding the liquid adhesive and starting to mix, so that the adhesive is evenly covered on the surface of the organic fertilizer particles, then putting in the support strips 4, and continuing to mix so that the support strips 4 are evenly attached to the surface of the organic fertilizer particles, until the adhesive is solidified to obtain burr-shaped particles.

[0075] S3, expansion layer 5 processing: heat the expansion layer 5 to melt it into liquid, and then add it into the second disc mixer, and the total thickness of the liquid expansion layer 5 is not greater than the radial length of the support strip 4 on the surface of the burr-shaped particles, so that when the burr-shaped particles roll, only the support strip 4 is in contact with the expansion layer 5, and then the burr-shaped particles are put into the second disc mixer, and mixing begins to make the burr-shaped particles roll on the surface of the liquid expansion layer 5, so that the expansion layer 5 adheres to the surface of the support strip 4, and then the burr-shaped particles that have been attached are output and cooled to solidify the expansion layer 5.

[0076] S4, integral molding: the burr-shaped particles with the expansion layer 5 are put into the second granulator, the raw materials of the slow-release layer 3 are added, and then water is added to moisten and granulate to obtain the desired organic fertilizer granule product.

[0077] In steps S1 and S4, the first granulator and the second granulator are disc granulators with a rotation speed of 12 r / min. The temperature is maintained at 55° C. during the granulation process.

[0078] Embodiment 5:

[0079] In this embodiment, the inner layer uses an organic fertilizer raw material obtained by fermenting a mixture of bran and straw in equal proportions.

[0080] The material of the adhesive layer 2 is starch glue.

[0081] The sustained-release layer 3 includes the following components calculated by weight: 70 parts of corn starch, 20 parts of cassava starch, and 45 parts of compound fertilizer, wherein the compound fertilizer includes the following components calculated by weight: 21 parts of urea, 29 parts of monoammonium phosphate, and 15 parts of potassium nitrate.

[0082] The support strip 4 is made of kraft paper.

[0083] The expansion layer 5 is a water-absorbing resin, specifically a starch-acrylic acid graft polymer.

[0084] The production method of the anti-loss organic fertilizer in the present embodiment comprises the following steps:

[0085] S1. Organic fertilizer granulation: the pre-processed organic fertilizer powder is put into the first granulator, moistened with water and granulated to obtain organic fertilizer granules.

[0086] S2, wrapping with support strips 4: putting the organic fertilizer particles into the first disc mixer, adding the liquid adhesive and starting to mix, so that the adhesive is evenly covered on the surface of the organic fertilizer particles, then putting in the support strips 4, and continuing to mix so that the support strips 4 are evenly attached to the surface of the organic fertilizer particles, until the adhesive is solidified to obtain burr-shaped particles.

[0087] S3, expansion layer 5 processing: heat the expansion layer 5 to melt it into liquid, and then add it into the second disc mixer, and the total thickness of the liquid expansion layer 5 is not greater than the radial length of the support strip 4 on the surface of the burr-shaped particles, so that when the burr-shaped particles roll, only the support strip 4 is in contact with the expansion layer 5, and then the burr-shaped particles are put into the second disc mixer, and mixing begins to make the burr-shaped particles roll on the surface of the liquid expansion layer 5, so that the expansion layer 5 adheres to the surface of the support strip 4, and then the burr-shaped particles that have been attached are output and cooled to solidify the expansion layer 5.

[0088] S4, integral molding: the burr-shaped particles with the expansion layer 5 are put into the second granulator, the raw materials of the slow-release layer 3 are added, and then water is added to moisten and granulate to obtain the desired organic fertilizer granule product.

[0089] In steps S1 and S4, the first granulator and the second granulator are disc granulators with a rotation speed of 14 r / min. The temperature is maintained at 55° C. during the granulation process.

[0090] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. An anti-loss organic fertilizer, the organic fertilizer is a spherical particle, characterized in that: It comprises an inner layer, a middle layer and an outer layer which are arranged in sequence from the inside to the outside, wherein the inner layer is an organic fertilizer layer, the middle layer is an adhesive layer, the outer layer is a slow-release layer, a plurality of support strips are arranged between the middle layer and the outer layer, the support strips are slender elastic strip structures, and the part of the support strips outside the middle layer is also wrapped with an expansion layer, and the expansion layer expands after absorbing water.

2. A kind of anti-loss organic fertilizer as claimed in claim 1, characterized in that: The material of the adhesive layer includes one of starch glue, sodium lignin sulfonate and sodium carboxymethyl cellulose.

3. A kind of anti-loss organic fertilizer as claimed in claim 1, characterized in that: The sustained-release layer comprises the following components calculated by weight: 60-70 parts of corn starch, 15-27 parts of cassava starch, and 40-50 parts of compound fertilizer.

4. A kind of anti-loss organic fertilizer as claimed in claim 1, characterized in that: The material of the support strip includes one of polylactic acid, polyhydroxyalkanoate or kraft paper.

5. A kind of anti-loss organic fertilizer as claimed in claim 1, characterized in that: The expansion layer includes one of a water-absorbing resin or a water-swelling rubber.

6. A kind of anti-loss organic fertilizer as claimed in claim 3, characterized in that: The compound fertilizer comprises the following components calculated by weight: 20-22 parts of urea, 28-29 parts of monoammonium phosphate, and 15-18 parts of potassium nitrate.

7. A method for producing an anti-loss organic fertilizer as claimed in claim 1, characterized in that: The steps include: S1, organic fertilizer granulation: putting the pre-processed organic fertilizer powder into the first granulator, adding water to moisten and granulate to obtain organic fertilizer granules; S2, wrapping with support strips: putting the organic fertilizer particles into the first disc mixer, adding the liquid adhesive and starting to mix, so that the adhesive is evenly covered on the surface of the organic fertilizer particles, then putting in the support strips, and continuing to mix so that the support strips are evenly attached to the surface of the organic fertilizer particles, until the adhesive is solidified, to obtain burr-shaped particles; S3, expansion layer processing: heating the expansion layer to melt it into a liquid state, and then adding it into the second disc mixer, then adding the burr-shaped particles into the second disc mixer, starting to mix so that the burr-shaped particles roll on the surface of the liquid expansion layer, allowing the expansion layer to adhere to the surface of the support strip, and then outputting the burr-shaped particles that have been adhered and cooling so that the expansion layer solidifies; S4, overall forming: the burr-shaped particles with the expansion layer are put into the second granulator, the slow-release layer raw materials are added, and then water is added to moisten and granulate to obtain the desired organic fertilizer granule product.

8. A method for producing a loss-proof organic fertilizer as claimed in claim 7, characterized in that: In the steps S1 and S4, the first granulator and the second granulator are disc granulators with a rotation speed of 12-15 r / min.

9. The production method of a kind of anti-loss organic fertilizer as claimed in claim 7, characterized in that: In the steps S1 and S4, the temperature is maintained at 50-55°C during the granulation process.

10. A method for producing an anti-loss organic fertilizer as claimed in claim 7, characterized in that: In step S3, the total thickness of the liquid expansion layer added to the second disc mixer is not greater than the radial length of the support strips on the surface of the burr-shaped particles, so that when the burr-shaped particles roll, only the support strips are in contact with the expansion layer.

Images