CN112358351A - Ceramic hollow microsphere coated fish protein amino acid water-soluble slow-release fertilizer and preparation method thereof - Google Patents

Ceramic hollow microsphere coated fish protein amino acid water-soluble slow-release fertilizer and preparation method thereof Download PDF

Info

Publication number
CN112358351A
CN112358351A CN202011275312.5A CN202011275312A CN112358351A CN 112358351 A CN112358351 A CN 112358351A CN 202011275312 A CN202011275312 A CN 202011275312A CN 112358351 A CN112358351 A CN 112358351A
Authority
CN
China
Prior art keywords
amino acid
fertilizer
fish protein
protein amino
ceramic
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
CN202011275312.5A
Other languages
Chinese (zh)
Inventor
周雄
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ningbo University
Original Assignee
Ningbo University
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ningbo University filed Critical Ningbo University
Priority to CN202011275312.5A priority Critical patent/CN112358351A/en
Publication of CN112358351A publication Critical patent/CN112358351A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05C—NITROGENOUS FERTILISERS
    • C05C11/00—Other nitrogenous fertilisers
    • 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
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Pest Control & Pesticides (AREA)
  • Fertilizers (AREA)

Abstract

The invention discloses a ceramic hollow microsphere coated fish protein amino acid water-soluble slow-release fertilizer and a preparation method thereof, wherein the fertilizer comprises the following raw materials in parts by weight: 20-30 parts of ceramic open-cell hollow microspheres, 40-60 parts of fish protein amino acid water-soluble fertilizer, 5-10 parts of sugar alcohol and 5-10 parts of bentonite. Putting the ceramic open-cell hollow microspheres into a shaking tray of a disc granulator, rotating the shaking tray and spraying the fish protein amino acid water-soluble fertilizer by using a spray head, and controlling proper shaking time to enable the ceramic open-cell hollow microspheres to fully adsorb the fish protein amino acid water-soluble fertilizer to obtain wet granules. And then, conveying the wet granules into a dryer for drying through a conveyor belt to obtain dry granules of the ceramic open-pore hollow microsphere coated fish protein amino acid water-soluble fertilizer, and adding the dry granules, sugar alcohol and bentonite into a stirrer for uniformly mixing. The invention has the advantages that: the organic fertilizer has large adsorption capacity and good slow release effect. Increases the organic nutrients of the farmland while improving the utilization rate of the fertilizer, and has good ecological effect.

Description

Ceramic hollow microsphere coated fish protein amino acid water-soluble slow-release fertilizer and preparation method thereof
Technical Field
The invention relates to the field of fertilizers, in particular to a ceramic hollow microsphere coated fish protein amino acid water-soluble slow-release fertilizer and a preparation method thereof.
Background
The potential fertility of cultivated land in China is generally low, the recycling rate and the reutilization rate of organic matters are not high, and the demands of people on grains and crops are mainly ensured by using chemical fertilizers at the present stage in order to improve the yield of crops. In the production practice, the utilization rate of the fertilizer is always low due to the comprehensive influence of conditions such as the property of the fertilizer, the soil environment, farming measures and the like. A large amount of soluble nutrient fertilizer is applied at one time, and the crop cannot absorb the fertilizer in time to cause fertilizer waste and serious pollution to the environment. Excessive fertilizer flows into surrounding rivers and lakes along with rainwater to form agricultural non-point source pollution, so that water eutrophication, algae breeding and fish anoxic death are caused, and the water environment is seriously damaged. Therefore, the development of slow and controlled release fertilizer technology to improve the utilization rate of the fertilizer is greatly needed in the current agriculture.
The coated fertilizer is a research hotspot of slow and controlled release fertilizers in recent years, and is a novel fertilizer which adopts organic high molecular polymers or inorganic hydrophobic materials to form a water-resisting layer on the surface of fertilizer particles so as to delay the dissolution and release rate of the fertilizer in the soil environment. The most direct and main factors influencing the sustained and controlled release performance of the coated fertilizer are the properties of the coating material, including the components of the coating material and the thickness of the coating.
Because the biodegradation rate of the natural polymer coating material is too high, the nutrient sustained and controlled release performance is poor. The synthetic polymer material has good sustained and controlled release performance, but has poor environmental degradation performance, which causes the limitation of the use of the organic polymer coating. The inorganic coated fertilizer is a slow-release fertilizer produced by coating a fertilizer core with a hydrophobic or functional inorganic material as a coating material. At present, the fertilizer is mainly coated by magnesium ammonium phosphate and zeolite. Compared with organic high molecular polymer coating materials, the inorganic coating material has low cost and is environment-friendly, the porosity and the gap tortuosity of the coating are large, but the compactness is relatively poor, the inorganic coating material is not tightly combined with the fertilizer, and the slow release effect needs to be improved.
At present, the farmland organic material input is serious and insufficient, so that the soil acidification is serious, the organic matter content is reduced, the granular structure is damaged, and the fertilizer retention capacity is reduced. Due to the long-term application of fertilizers in farmlands, the nitrate content of crops is relatively high, the nitrate is converted into nitrite in human bodies, and then the nitrite is combined with amines in the human bodies to generate a strong carcinogen, namely nitrosamine, so that the health of the human bodies is seriously influenced. Therefore, the novel organic slow-release fertilizer which is yield-increasing, synergistic and environment-friendly is provided for agricultural production as soon as possible, and the organic slow-release fertilizer has extremely important significance for guaranteeing food safety and protecting ecological environment in China.
Disclosure of Invention
The invention provides a ceramic hollow microsphere coated fish protein amino acid water-soluble slow-release fertilizer and a preparation method thereof, aiming at the defects of the existing agricultural fertilizer product.
The technical solution of the invention is as follows:
the ceramic hollow microsphere coated fish protein amino acid water-soluble slow-release fertilizer comprises the following raw materials in parts by weight: 20-30 parts of ceramic open-cell hollow microspheres, 40-60 parts of fish protein amino acid water-soluble fertilizer, 5-10 parts of sugar alcohol and 5-10 parts of bentonite.
The ceramic open-pore hollow microsphere has the particle size of 20-200 mu m and the volume weight of 680-720kg/m3The open porosity is 50-85%. The material as inorganic coating material has stable chemical performance, large specific surface area and high adsorption rate.
The fish protein amino acid water-soluble fertilizer is brewed by adopting a natural green fermentation process at normal temperature. The product is rich in various amino acids, active peptides, organic acids, vitamins, medium and trace elements, plant growth factors and other active substances, and has balanced and comprehensive nutrient elements (the detailed preparation method is according to the patent number CN 201810521499.9).
The sugar alcohol is a polyol, contains more than two hydroxyl groups, is a good complexing agent of medium and trace elements, can be combined with various nutrient substances to form a stable complex, is also a natural wetting agent, and has a moisturizing function. The sugar alcohol can carry mineral nutrients to be rapidly transported in phloem after being absorbed by plants, so that the plants can adapt to the growth of adverse conditions by adjusting the permeability of cells, and the stress resistance of the plants is improved. At present, sugar alcohol varieties comprise sorbitol, mannitol, erythritol, maltitol, lactitol, xylitol and the like. The preferred sugar alcohol is sorbitol, which is less expensive.
The bentonite is also called bentonite or bentonite, and is clay rock with montmorillonite as main component. The montmorillonite structure is 2: 1 type crystal structure composed of two silicon-oxygen tetrahedrons sandwiching a layer of aluminum-oxygen octahedron, the layered structure formed by montmorillonite unit cell has some cations, and the interlayer cation is Na+Sodium bentonite is called when the soil is used; yang between layersThe ion being Ca2+The product is called calcium bentonite; interlayer cation is H+The bentonite is called as hydrogen bentonite; when the interlayer cation is organic cation, it is called organobentonite. Due to the unique crystal structure and chemical properties of montmorillonite, bentonite has a series of excellent physicochemical properties such as strong water absorption, expansibility, adsorbability, dispersibility, adhesiveness, cation exchange property, water and fertilizer retention property and the like. The bentonite contains macroelements and microelements required by animals and plants, and is a better soil conditioner. Wherein, the sodium bentonite has high dispersion degree, high water absorption and large expansion times. Therefore, a preferred bentonite is sodium bentonite.
A preparation method of a ceramic hollow microsphere coated fish protein amino acid water-soluble slow-release fertilizer comprises the following steps:
putting the ceramic open-cell hollow microspheres into a shaking tray of a disc granulator, rotating the shaking tray and spraying the fish protein amino acid water-soluble fertilizer by using a spray head, and controlling proper shaking time to enable the ceramic open-cell hollow microspheres to fully adsorb the fish protein amino acid water-soluble fertilizer to obtain wet granules. And then, conveying the wet granules into a dryer for drying through a conveyor belt to obtain dry granules of the ceramic open-pore hollow microsphere coated fish protein amino acid water-soluble fertilizer, and adding the dry granules, sugar alcohol and bentonite into a stirrer for uniformly mixing.
The disk granulator makes materials in a good flowing bed layer through the rotating motion of an inclined disk, and produces round, smooth and certain-strength particles through friction, impact, turning, extrusion, agglomeration and adhesion under the condition of keeping a proper amount of liquid phase.
The invention discloses a ceramic hollow microsphere coated fish protein amino acid water-soluble slow-release fertilizer and a preparation method thereof, wherein the fertilizer has the advantages that:
1. a large number of communicated holes are distributed in the ceramic open-pore hollow microspheres, and the ceramic open-pore hollow microspheres have large open-pore porosity, strong adsorption capacity and large adsorption capacity.
2. The fish protein amino acid water-soluble fertilizer rich in various amino acids, polypeptides, small molecular organic acids and beneficial strains is used for replacing the traditional fertilizer, and is wrapped in the ceramic open-pore hollow microsphere slow-release base material to timely and properly supply organic nutrients with comprehensive and balanced nutrition for plants.
3. The dried ceramic open-pore hollow microsphere coated fish protein amino acid water-soluble fertilizer particles are mixed with sugar alcohol and bentonite, and the outer surface pores of the ceramic hollow microspheres are sealed by utilizing the wet viscosity of the sugar alcohol and the adsorbability of the bentonite, so that the slow release effect of the fertilizer is further improved, and the utilization rate of the fertilizer is improved.
Detailed Description
The present invention will be described in further detail with reference to specific examples. The examples given are not intended to be limiting. Wherein the nutrient release rate is determined according to GB/T23348-2009.
Example 1:
and (3) putting 20kg of ceramic open-pore hollow microspheres into a shaking plate of a disc granulator, rotating the shaking plate, spraying 60kg of fish protein amino acid water-soluble fertilizer by using a spray head, and shaking to enable the ceramic open-pore hollow microspheres to fully adsorb the fish protein amino acid water-soluble fertilizer to obtain wet granules. And then, conveying the wet granules into a dryer for drying through a conveying belt to obtain the dry granules of the ceramic open-pore hollow microsphere coated fish protein amino acid water-soluble fertilizer. And mixing the dried granules with 10kg of sorbitol and 10kg of sodium bentonite, adding into a stirrer, and uniformly mixing to obtain the ceramic hollow microsphere coated fish protein amino acid water-soluble slow-release fertilizer. The nutrient release period of the prepared slow release fertilizer is 36 days.
Example 2:
putting 30kg of ceramic open-cell hollow microspheres into a shaking plate of a disc granulator, rotating the shaking plate and spraying 60kg of fish protein amino acid water-soluble fertilizer by using a spray head, and shaking to enable the ceramic open-cell hollow microspheres to fully adsorb the fish protein amino acid water-soluble fertilizer to obtain wet granules. And then, conveying the wet granules into a dryer for drying through a conveying belt to obtain the dry granules of the ceramic open-pore hollow microsphere coated fish protein amino acid water-soluble fertilizer. And mixing the dried granules with 5kg of mannitol and 5kg of calcium bentonite, adding into a stirrer, and uniformly mixing to obtain the ceramic hollow microsphere coated fish protein amino acid water-soluble slow-release fertilizer. The nutrient release period of the prepared slow release fertilizer is 38 days.
Example 3:
putting 25kg of ceramic open-cell hollow microspheres into a shaking plate of a disc granulator, rotating the shaking plate and spraying 55kg of fish protein amino acid water-soluble fertilizer by using a spray head, and shaking to enable the ceramic open-cell hollow microspheres to fully adsorb the fish protein amino acid water-soluble fertilizer to obtain wet granules. And then, conveying the wet granules into a dryer for drying through a conveying belt to obtain the dry granules of the ceramic open-pore hollow microsphere coated fish protein amino acid water-soluble fertilizer. And mixing the dry granules with 10kg of xylitol and 10kg of calcium bentonite, adding into a stirrer, and uniformly mixing to obtain the ceramic hollow microsphere coated fish protein amino acid water-soluble slow-release fertilizer. The nutrient release period of the prepared slow release fertilizer is 42 days.
Example 4:
putting 30kg of ceramic open-cell hollow microspheres into a shaking plate of a disc granulator, rotating the shaking plate and spraying 50kg of fish protein amino acid water-soluble fertilizer by using a spray head, and shaking to enable the ceramic open-cell hollow microspheres to fully adsorb the fish protein amino acid water-soluble fertilizer to obtain wet granules. And then, conveying the wet granules into a dryer for drying through a conveying belt to obtain the dry granules of the ceramic open-pore hollow microsphere coated fish protein amino acid water-soluble fertilizer. And mixing the dried granules with 10kg of sorbitol and 10kg of sodium bentonite, adding into a stirrer, and uniformly mixing to obtain the ceramic hollow microsphere coated fish protein amino acid water-soluble slow-release fertilizer. The nutrient release period of the prepared slow release fertilizer is 50 days.

Claims (4)

1. The water-soluble slow-release fertilizer is characterized by being prepared from the following raw materials in parts by weight: 20-30 parts of ceramic open-cell hollow microspheres, 40-60 parts of fish protein amino acid water-soluble fertilizer, 5-10 parts of sugar alcohol and 5-10 parts of bentonite.
2. The water-soluble slow-release fertilizer with ceramic hollow microsphere coated fish protein and amino acid as claimed in claim 1, wherein the ceramic open hollow microsphere has a particle size of 20-200 μm and a bulk density of 680-720kg/m3The open porosity is 50-85%.
3. The water-soluble slow-release fertilizer with ceramic cenospheres coated fish protein amino acid and the preparation method thereof as claimed in claim 1, is characterized in that the bentonite is preferably sodium bentonite.
4. The water-soluble slow-release fertilizer containing ceramic cenospheres coated fish protein amino acid and the preparation method thereof according to any one of claims 1 to 3, is characterized by comprising the following steps:
putting the ceramic open-cell hollow microspheres into a shaking tray of a disc granulator, rotating the shaking tray and spraying the fish protein amino acid water-soluble fertilizer by using a spray head, and controlling proper shaking time to enable the ceramic open-cell hollow microspheres to fully adsorb the fish protein amino acid water-soluble fertilizer to obtain wet granules. And then, conveying the wet granules into a dryer for drying through a conveyor belt to obtain dry granules of the ceramic open-pore hollow microsphere coated fish protein amino acid water-soluble fertilizer, and adding the dry granules, sugar alcohol and bentonite into a stirrer for uniformly mixing.
CN202011275312.5A 2020-11-10 2020-11-10 Ceramic hollow microsphere coated fish protein amino acid water-soluble slow-release fertilizer and preparation method thereof Withdrawn CN112358351A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011275312.5A CN112358351A (en) 2020-11-10 2020-11-10 Ceramic hollow microsphere coated fish protein amino acid water-soluble slow-release fertilizer and preparation method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011275312.5A CN112358351A (en) 2020-11-10 2020-11-10 Ceramic hollow microsphere coated fish protein amino acid water-soluble slow-release fertilizer and preparation method thereof

Publications (1)

Publication Number Publication Date
CN112358351A true CN112358351A (en) 2021-02-12

Family

ID=74514926

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202011275312.5A Withdrawn CN112358351A (en) 2020-11-10 2020-11-10 Ceramic hollow microsphere coated fish protein amino acid water-soluble slow-release fertilizer and preparation method thereof

Country Status (1)

Country Link
CN (1) CN112358351A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113135790A (en) * 2021-04-12 2021-07-20 宁波大学 Storage type sustained and controlled release fish protein amino acid composite water soluble fertilizer and preparation method thereof

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101870588A (en) * 2009-04-21 2010-10-27 河北勇龙邦大新材料有限公司 Method and device for preparing hollow ceramic microspheres
CN103880549A (en) * 2014-03-27 2014-06-25 清华大学 Method for producing hollow ceramic microbead-loaded urea formaldehyde slow-release fertilizer
CN103880550A (en) * 2014-03-27 2014-06-25 清华大学 Slow-release fertilizer prepared by using hollow ceramic micro-bead coating method and preparation method thereof
CN104557339A (en) * 2015-02-03 2015-04-29 舟山源丰海洋生物科技有限公司 Preparation method of soluble fish protein ammonia acid fertilizer
CN206591045U (en) * 2017-03-20 2017-10-27 浙江欧格纳科海洋生物科技有限公司 A kind of equipment for preparing Fish protein amino acid water-soluble fertilizer
CN108707563A (en) * 2018-05-28 2018-10-26 宁波吉丰生物科技发展有限公司 The preparation method of composite fermentation microbial inoculum and Fish protein amino acid Water soluble fertilizer
CN109997620A (en) * 2019-05-26 2019-07-12 山东工艺美术学院 Type wheat stalk humus base-material is received to prepare the implantation methods of sand-fixing device turf
CN110050645A (en) * 2019-05-26 2019-07-26 山东工艺美术学院 Pellet black earth biological organic fertilizer prepares sand-fixing device turf implantation methods

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101870588A (en) * 2009-04-21 2010-10-27 河北勇龙邦大新材料有限公司 Method and device for preparing hollow ceramic microspheres
CN103880549A (en) * 2014-03-27 2014-06-25 清华大学 Method for producing hollow ceramic microbead-loaded urea formaldehyde slow-release fertilizer
CN103880550A (en) * 2014-03-27 2014-06-25 清华大学 Slow-release fertilizer prepared by using hollow ceramic micro-bead coating method and preparation method thereof
CN104557339A (en) * 2015-02-03 2015-04-29 舟山源丰海洋生物科技有限公司 Preparation method of soluble fish protein ammonia acid fertilizer
CN206591045U (en) * 2017-03-20 2017-10-27 浙江欧格纳科海洋生物科技有限公司 A kind of equipment for preparing Fish protein amino acid water-soluble fertilizer
CN108707563A (en) * 2018-05-28 2018-10-26 宁波吉丰生物科技发展有限公司 The preparation method of composite fermentation microbial inoculum and Fish protein amino acid Water soluble fertilizer
CN109997620A (en) * 2019-05-26 2019-07-12 山东工艺美术学院 Type wheat stalk humus base-material is received to prepare the implantation methods of sand-fixing device turf
CN110050645A (en) * 2019-05-26 2019-07-26 山东工艺美术学院 Pellet black earth biological organic fertilizer prepares sand-fixing device turf implantation methods

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113135790A (en) * 2021-04-12 2021-07-20 宁波大学 Storage type sustained and controlled release fish protein amino acid composite water soluble fertilizer and preparation method thereof

Similar Documents

Publication Publication Date Title
Chen et al. Environmentally friendly fertilizers: A review of materials used and their effects on the environment
EP3932896B1 (en) Biochar-based fertilizer for improving foreshore saline-alkali soil, and preparation method and use thereof
CN102838413B (en) Ternary slow-release compound fertilizer and preparation method thereof
US11584855B2 (en) Agricultural coating containing sugar ester and methods
CN106318395A (en) Acid soil conditioner and preparation method and application thereof
US3232740A (en) Agricultural nutrient containing urea
CN101054314A (en) Composite organism slow release fertilizer product and producing method
CN1307125C (en) Release-controlled coated urea and its preparation method
JP2015501332A (en) Multipurpose lignin-carbohydrate binding system
AU2020101605A4 (en) A Fluid Seed Formula, Fluid Seed And Manufacturing Process Thereof Used For Vegetation Restoration of the Tidal Salt-Marsh In Coastal Wetland
CN108516899B (en) Functional slow/controlled release fertilizer core based on bio-based binder and preparation method thereof
CN1850742A (en) Environment-protection type coated release-controlled urea and preparing method
CN101857490A (en) Slow/controlled-release compound fertilizer suitable for field crops
CN103435425B (en) Hierarchical slow release multielement fertilizer and manufacturing process thereof
Ganetri et al. Controlling factors of slow or controlled-release fertilizers
CN101486611A (en) High tower spraying granulation humic acid organic and inorganic compound fertilizer and technique for producing the same
CN105481555A (en) Biological organic-inorganic loss-controlled fertilizer with core-shell structure
CN107141065A (en) A kind of self-curing film-coated controlled release fertilizer and preparation method thereof
CN107245001A (en) A kind of functional slow-release fertilizer and its production method
CN106746832B (en) A kind of degradable aggregate processing method with fertilizer efficiency
CN1074206A (en) Coated slow release fertilizer and method for making thereof
CN112358351A (en) Ceramic hollow microsphere coated fish protein amino acid water-soluble slow-release fertilizer and preparation method thereof
CN111574290A (en) Efficient environment-friendly fertilizer and preparation method thereof
CN107311755B (en) Special long-acting fertilizer for improving salt tolerance of saline-alkali soil crops and preparation method thereof
CN109824427A (en) A kind of Slow-release organic fertilizer improving heavy metal pollution of soil

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
WW01 Invention patent application withdrawn after publication

Application publication date: 20210212

WW01 Invention patent application withdrawn after publication