WO2012138210A1 - Multilayer controlled release fertilizer and method for producing the same - Google Patents

Multilayer controlled release fertilizer and method for producing the same Download PDF

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Publication number
WO2012138210A1
WO2012138210A1 PCT/MY2012/000114 MY2012000114W WO2012138210A1 WO 2012138210 A1 WO2012138210 A1 WO 2012138210A1 MY 2012000114 W MY2012000114 W MY 2012000114W WO 2012138210 A1 WO2012138210 A1 WO 2012138210A1
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WO
WIPO (PCT)
Prior art keywords
nutrients
controlled release
release fertilizer
growth
urea
Prior art date
Application number
PCT/MY2012/000114
Other languages
French (fr)
Inventor
Zilati Ku Shaari Ku
Yahya Noorhana
Man Zakaria
Original Assignee
Universiti Teknologi Petronas
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Publication of WO2012138210A1 publication Critical patent/WO2012138210A1/en

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05C—NITROGENOUS FERTILISERS
    • C05C9/00—Fertilisers containing urea or urea compounds
    • C05C9/005—Post-treatment
    • 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
    • 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
    • C05G5/37—Layered or coated, e.g. dust-preventing coatings layered or coated with a polymer

Definitions

  • the present invention generally relates to fertilizers, and more particularly to a multilayer controlled release fertilizer that meets the needs of crop growth in different phases and further to a method for producing the multilayer controlled release fertilizer.
  • Polymer encapsulation is another popular method for making controlled release fertilizers. Examples include the use of a dicyclopentadiene-based resin to encapsulate water-soluble fertilizers (US Pat No. 4,657,576), and the use of urethane-based coatings (US Pat No. 6,039,781). Moreover, US Pat No. 6,540,808 discloses a method for coating fertilizers by a self assembly of amphiphilic molecules having a hydrophilic portion and a hydrophobic portion, wherein the hydrophilic portion is proximal relative to the fertilizer, and the self assembly forms a multilayer that provides a hydrophobic barrier to block water vapor and water from contacting the fertilizer.
  • the coated or encapsulated fertilizers usually contain only one type of fertilizer for the need of one phase of crop growthf they cannot satisfy the different needs during different stages of crop growth.
  • some of the coatings used are not bio-degradable or water insoluble polymers, causing harms to the environment. Summary of the Invention
  • one objective of the present invention is to provide a multilayer controlled release fertilizer that meets the needs of different stages in the cycle of crop growth.
  • the multilayer controlled release fertilizer comprises a plurality of layers which contain one or more nutrients for growth of leaf, flower, fruit, and a core particle; wherein the core particle is sequentially coated with the plurality of layers containing one or more crop nutrients to produce the multilayer controlled release fertilizer that provides the nutrients to meet the needs of crop growth in different phases.
  • the multilayer controlled release fertilizer comprises an outmost layer comprising one or more nutrients for leaf growth, a middle layer comprising one or more nutrients for flower growth, an inner layer comprising one or more nutrients for fruit growth, and a core particle, wherein the core particle is sequentially coated with the inner layer, the middle layer and the outmost layer to produce the multiplayer controlled release fertilizer that provides the nutrients to meet the needs of crop growth in different phases.
  • the outmost layer is composed of urea and the one or more nutrients for leaf growth
  • the middle layer is composed of urea and the one or more nutrients for flower growth
  • the inner layer is composed of urea and the one or more nutrients for fruit growth
  • the core particle is composed of urea.
  • the one or more nutrients are selected from N, P, K or combination products thereof, calcium, magnesium, sulfur, boron, copper, iron, manganese, molybdenum, zinc, urea, ammonium nitrate, diammonium phosphate, monoammonium phosphate, potash, potassium chloride, ammonium sulfate, and potassium sulfate.
  • plurality of the layers including one or more of the outmost layer, middle layer, inner layer, or core further comprises one or more bio-degradable or chemically-modified water-soluble polymers; wherein the addition of the polymers provides additional control the release rate and duration.
  • the bio-degradable or chemically-modified water soluble polymers are selected from the group consisting of alkyd resins, drying oils and modified oils, vinyl reins (e.g., poly(vinyl acetate) and poly(vinyl acetal)), acrylic polymers (e.g., poly(m ethyl acrylate)), polyesters (e.g., poly(alkylene terephthalate)), epoxy resins (e.g., poly(propylene oxide)), polyamides (e.g., polycaprolactam)), polycarbonates (e.g., poly(alkylene carbonate, polyethylene and its copolymers.
  • vinyl reins e.g., poly(vinyl acetate) and poly(vinyl acetal)
  • acrylic polymers e.g., poly(m ethyl acrylate)
  • polyesters e.g., poly(alkylene terephthalate)
  • epoxy resins e.g., poly(
  • plurality of the layers including one or more of the outmost layer, middle layer, inner layer, or core are separately coated with one or more coating layers that are formed by one or more bio-degradable polymers and/or one or more chemically-modified water-soluble polymers; wherein the coating layers fine tune the release rate and duration.
  • the bio-degradable or chemically-modified water soluble polymers are selected from the group consisting of alkyd resins, drying oils and modified oils, vinyl reins (e.g., poly( vinyl acetate) and poly(vinyl acetal)), acrylic polymers (e.g., poly(methyl acrylate)), polyesters (e.g., poly(alkylene terephthalate)), epoxy resins (e.g., poly(propylene oxide)), polyamides (e.g., polycaprolactam)), polycarbonates (e.g., poly(alkylene carbonate, polyethylene and its copolymers.
  • vinyl reins e.g., poly( vinyl acetate) and poly(vinyl acetal)
  • acrylic polymers e.g., poly(methyl acrylate)
  • polyesters e.g., poly(alkylene terephthalate)
  • epoxy resins e.g., poly(propylene oxide)
  • polyamides e.g
  • Another aspect of the present invention provides a method for a multilayer controlled release fertilizer.
  • the method comprises the steps of providing urea particles as cores in a fluidized bed, coating the core urea particles with an inner layer comprising urea and one or more nutrients for fruit growth, coating over the inner layer a middle layer comprising urea and one or more nutrients for flower growth, and coating over the middle layer an outmost layer comprising urea and one or more nutrients for leaf growth, thereby the multilayer controlled release fertilizer is made.
  • the one or more nutrients are selected from N, P, K or combination products thereof, calcium, magnesium, sulfur, boron, copper, iron, manganese, molybdenum, zinc, urea, ammonium nitrate, diammonium phosphate, monoammonium phosphate, potash, potassium chloride, ammonium sulfate, and potassium sulfate.
  • Another aspect of the present invention provides fertilizer package comprises at least two types of the multilayer controlled release fertilizer, wherein one of the at least two types of the multilayer controlled release fertilizer is large-sized, and the other is small-sized, and the small-sized fertilizer fits into the spaces of the large-sized fertilizer; thereby the fertilizers are compactly packed.
  • FIG 1 shows an exemplary cross-sectional illustration of the multilayer controlled release fertilizer in accordance with one embodiment of the present invention.
  • FIG 2 shows a schematic diagram of the fertilizer packages with two different sized particles in accordance with one embodiment of the present invention.
  • Crop growth goes through a cycle; thus crop needs different fertilizers in its different stages including an early stage for the growth of leaves, a later stage for the growth of flowers, and a final stage for the growth of fruit.
  • the present invention is intended to meet this need.
  • the present invention provides a multi-functional controlled release fertilizer with plurality of layers, each of which provides different nutrients to meet the physiological needs during the various stages of crop growth.
  • each layer of the multi-functional controlled release fertilizer is urea-based.
  • FIG 1 there is provided an exemplary cross-sectional illustration of the multilayer controlled release fertilizer in accordance with one embodiment of the present invention.
  • the multilayer controlled release fertilizer 100 comprises an outmost layer 104 that is composed of urea and fertilizer for leaf growth, a middle layer 103 that is composed of urea and fertilizer for flower growth, an inner layer 102 that is composed of urea and fertilizer for fruit growth, and a core 101 that is composed of urea.
  • the core can be any fertilizer suitable for any desired need for a specific crop.
  • the composition of fertilizers for leaf, flower or fruit growth is made according to the need of any specific crop.
  • the thickness of each layer can also be varied to suit for any specific crop so as to control the release rate and duration for each phase because the phases of leaf, flower or fruit growth are variable for any individual crop.
  • Fertilizer nutrients suitable for producing different compositions include, but are not limited to, one ore more primary nutrients, one or more secondary nutrients and/or one or more micro nutrients.
  • Suitable primary nutrients include, but are not limited to, N, P, K or combination products thereof.
  • Suitable secondary nutrients include, but are limited to, calcium, magnesium and sulfur.
  • Suitable micro nutrients include, but are not limited to, boron, copper, iron, manganese, molybdenum and zinc.
  • the exemplary fertilizers include, but are not limited to, urea, ammonium nitrate, diammonium phosphate, monoammonium phosphate, potash, potassium chloride, ammonium sulfate, and potassium sulfate.
  • the present invention also provides a method for producing the multifunctional controlled release fertilizer with multiple layers.
  • the coating process is done in a fluidized bed to achieve film coating uniformity.
  • the coating process first provides urea particles as the cores, then coat the core urea particles with a layer composed of urea and one or more nutrients for fruit growth, then add another layer composed of urea and one or more nutrients for flower growth, and finally wrap with another layer composed of urea and one or more nutrients for leaf growth.
  • the percentages of nutrients in each layer are determined by the applications to specific crops, and the thickness of each layer is correlated with the desired duration of release for each phase. It is desired that the thickness of each layer is in the range of micrometer up to centimeter.
  • each layer further comprises one or more bio-degradable or chemically-modified water-soluble polymers to further control the release rate and duration.
  • each layer can be separately coated with one or more coating layers that are formed by one or more bio-degradable polymers and/or one or more chemically- modified water-soluble polymers so as to fine tune the release rate and duration.
  • the suitable polymers include, but are not limited to, alkyd resins, drying oils and modified oils, vinyl reins (e.g., poly(vinyl acetate) and poly(vinyl acetal)), acrylic polymers (e.g., poly(methyl acrylate)), polyesters (e.g., poly(alkylene terephthalate)), epoxy resins (e.g., poly(propylene oxide)), polyamides (e.g., polycaprolactam)), polycarbonates (e.g., poly(alkylene carbonate, polyethylene and its copolymers.
  • vinyl reins e.g., poly(vinyl acetate) and poly(vinyl acetal)
  • acrylic polymers e.g., poly(methyl acrylate)
  • polyesters e.g., poly(alkylene terephthalate)
  • epoxy resins e.g., poly(propylene oxide)
  • polyamides e.g., polycaprolactam
  • the fertilizer package 200 comprises large sized particles 202 and small sized particles 201.
  • the large and small particles are preferably manufactured for the same crop; in addition, they can also be composed of the same layers with different thickness, or they can comprise fewer layers so as to provide extra fertilizer for any specific phases of crop growth.
  • the small ones will occupy the spaces left by the large ones; therefore, the fertilizers can be compactly packed, providing effective packaging of the fertilizers.
  • the present invention has many advantages over the conventional type, such as reducing the rate of fertilizer removal from soil by rain or irrigation water, sustaining the supply of fertilizer or minerals for a prolonged time, increasing efficiency of the fertilizer, lowering the frequency of application in accordance with normal crop requirement and minimizing potential negative effects associated with over dosage.
  • the present invention can lead to one harvest one application.

Abstract

The present invention provides a multilayer controlled release fertilizer that comprises a plurality of layers which contain one or more nutrients for growth of leaf, flower, fruit, and a core particle, wherein the core particle is sequentially coated with a plurality of layers containing one or more crop nutrients to produce the multilayer controlled release fertilizer that provides the nutrients to meet the needs of crop growth in different phases. The present invention also provides a multilayer controlled release fertilizer that comprises an outmost layer comprising one or more nutrients for leaf growth, a middle layer comprising one or more nutrients for flower growth, an inner layer comprising one or more nutrients for fruit growth, and a core particle sequentially coated with the inner layer, the middle layer and the outmost layer to produce the multiplayer controlled release fertilizer. The present invention further provides a method for producing the multilayer controlled release fertilizer.

Description

MULTILAYER CONTROLLED RELEASE FERTILIZER AND METHOD FOR
PRODUCING THE SAME
Field of the Invention
[0001] The present invention generally relates to fertilizers, and more particularly to a multilayer controlled release fertilizer that meets the needs of crop growth in different phases and further to a method for producing the multilayer controlled release fertilizer. Background of the Invention
[0002] In order to prolong the release of fertilizers, coats and encapsulations of the fertilizers are the major methods for providing controlled releases. Water-soluble fertilizers encapsulated in water insoluble coatings are released at controlled rate. For example, US Pat No. 3,342,577 discloses a sulfur coated fertilizer with controlled release.
[0003] Polymer encapsulation is another popular method for making controlled release fertilizers. Examples include the use of a dicyclopentadiene-based resin to encapsulate water-soluble fertilizers (US Pat No. 4,657,576), and the use of urethane-based coatings (US Pat No. 6,039,781). Moreover, US Pat No. 6,540,808 discloses a method for coating fertilizers by a self assembly of amphiphilic molecules having a hydrophilic portion and a hydrophobic portion, wherein the hydrophilic portion is proximal relative to the fertilizer, and the self assembly forms a multilayer that provides a hydrophobic barrier to block water vapor and water from contacting the fertilizer.
[0004] However, the coated or encapsulated fertilizers usually contain only one type of fertilizer for the need of one phase of crop growthf they cannot satisfy the different needs during different stages of crop growth. In addition, some of the coatings used are not bio-degradable or water insoluble polymers, causing harms to the environment. Summary of the Invention
[0005] Therefore, one objective of the present invention is to provide a multilayer controlled release fertilizer that meets the needs of different stages in the cycle of crop growth.
[0006] One aspect of the present invention provides a multilayer controlled release fertilizer. In one embodiment, the multilayer controlled release fertilizer comprises a plurality of layers which contain one or more nutrients for growth of leaf, flower, fruit, and a core particle; wherein the core particle is sequentially coated with the plurality of layers containing one or more crop nutrients to produce the multilayer controlled release fertilizer that provides the nutrients to meet the needs of crop growth in different phases.
[0007] In another embodiment, the multilayer controlled release fertilizer comprises an outmost layer comprising one or more nutrients for leaf growth, a middle layer comprising one or more nutrients for flower growth, an inner layer comprising one or more nutrients for fruit growth, and a core particle, wherein the core particle is sequentially coated with the inner layer, the middle layer and the outmost layer to produce the multiplayer controlled release fertilizer that provides the nutrients to meet the needs of crop growth in different phases. In one embodiment, the outmost layer is composed of urea and the one or more nutrients for leaf growth, the middle layer is composed of urea and the one or more nutrients for flower growth, the inner layer is composed of urea and the one or more nutrients for fruit growth, and the core particle is composed of urea.
[0008] In a further embodiment of the multilayer controlled release fertilizer, the one or more nutrients are selected from N, P, K or combination products thereof, calcium, magnesium, sulfur, boron, copper, iron, manganese, molybdenum, zinc, urea, ammonium nitrate, diammonium phosphate, monoammonium phosphate, potash, potassium chloride, ammonium sulfate, and potassium sulfate.
[0009] In one embodiment of the multilayer controlled release fertilizer, plurality of the layers, including one or more of the outmost layer, middle layer, inner layer, or core further comprises one or more bio-degradable or chemically-modified water-soluble polymers; wherein the addition of the polymers provides additional control the release rate and duration. In a further embodiment of the multilayer controlled release fertilizer, the bio-degradable or chemically-modified water soluble polymers are selected from the group consisting of alkyd resins, drying oils and modified oils, vinyl reins (e.g., poly(vinyl acetate) and poly(vinyl acetal)), acrylic polymers (e.g., poly(m ethyl acrylate)), polyesters (e.g., poly(alkylene terephthalate)), epoxy resins (e.g., poly(propylene oxide)), polyamides (e.g., polycaprolactam)), polycarbonates (e.g., poly(alkylene carbonate, polyethylene and its copolymers.
[0010] In another embodiment of the multilayer controlled release fertilizer, plurality of the layers, including one or more of the outmost layer, middle layer, inner layer, or core are separately coated with one or more coating layers that are formed by one or more bio-degradable polymers and/or one or more chemically-modified water-soluble polymers; wherein the coating layers fine tune the release rate and duration. In a further embodiment of the multilayer controlled release fertilizer, the bio-degradable or chemically-modified water soluble polymers are selected from the group consisting of alkyd resins, drying oils and modified oils, vinyl reins (e.g., poly( vinyl acetate) and poly(vinyl acetal)), acrylic polymers (e.g., poly(methyl acrylate)), polyesters (e.g., poly(alkylene terephthalate)), epoxy resins (e.g., poly(propylene oxide)), polyamides (e.g., polycaprolactam)), polycarbonates (e.g., poly(alkylene carbonate, polyethylene and its copolymers.
[0011] Another aspect of the present invention provides a method for a multilayer controlled release fertilizer. In one embodiment, the method comprises the steps of providing urea particles as cores in a fluidized bed, coating the core urea particles with an inner layer comprising urea and one or more nutrients for fruit growth, coating over the inner layer a middle layer comprising urea and one or more nutrients for flower growth, and coating over the middle layer an outmost layer comprising urea and one or more nutrients for leaf growth, thereby the multilayer controlled release fertilizer is made.
[0012] In another embodiment of the method, the one or more nutrients are selected from N, P, K or combination products thereof, calcium, magnesium, sulfur, boron, copper, iron, manganese, molybdenum, zinc, urea, ammonium nitrate, diammonium phosphate, monoammonium phosphate, potash, potassium chloride, ammonium sulfate, and potassium sulfate.
[0013] Another aspect of the present invention provides fertilizer package comprises at least two types of the multilayer controlled release fertilizer, wherein one of the at least two types of the multilayer controlled release fertilizer is large-sized, and the other is small-sized, and the small-sized fertilizer fits into the spaces of the large-sized fertilizer; thereby the fertilizers are compactly packed.
[0014] The objectives and advantages of the invention will become apparent from the following detailed description of preferred embodiments thereof in connection with the accompanying drawings.
Brief Description of the Drawings
[0015] Preferred embodiments according to the present invention will now be described with reference to the Figures, in which like reference numerals denote like elements.
[0016] FIG 1 shows an exemplary cross-sectional illustration of the multilayer controlled release fertilizer in accordance with one embodiment of the present invention.
[0017] FIG 2 shows a schematic diagram of the fertilizer packages with two different sized particles in accordance with one embodiment of the present invention.
Detailed Description of the Invention
[0018] The present invention may be understood more readily by reference to the following detailed description of certain embodiments of the invention.
[0019] Throughout this application, where publications are referenced, the disclosures of these publications are hereby incorporated by reference, in their entireties, into this application in order to more fully describe the state of art to which this invention pertains.
[0020] Crop growth goes through a cycle; thus crop needs different fertilizers in its different stages including an early stage for the growth of leaves, a later stage for the growth of flowers, and a final stage for the growth of fruit. The present invention is intended to meet this need.
[0021] The present invention provides a multi-functional controlled release fertilizer with plurality of layers, each of which provides different nutrients to meet the physiological needs during the various stages of crop growth. In one embodiment, each layer of the multi-functional controlled release fertilizer is urea-based. [0022] Now referring to FIG 1 , there is provided an exemplary cross-sectional illustration of the multilayer controlled release fertilizer in accordance with one embodiment of the present invention. As shown in FIG 1 , the multilayer controlled release fertilizer 100 comprises an outmost layer 104 that is composed of urea and fertilizer for leaf growth, a middle layer 103 that is composed of urea and fertilizer for flower growth, an inner layer 102 that is composed of urea and fertilizer for fruit growth, and a core 101 that is composed of urea. It is to be noted that the core can be any fertilizer suitable for any desired need for a specific crop. The composition of fertilizers for leaf, flower or fruit growth is made according to the need of any specific crop. Moreover, the thickness of each layer can also be varied to suit for any specific crop so as to control the release rate and duration for each phase because the phases of leaf, flower or fruit growth are variable for any individual crop.
[0023] Fertilizer nutrients suitable for producing different compositions include, but are not limited to, one ore more primary nutrients, one or more secondary nutrients and/or one or more micro nutrients. Suitable primary nutrients include, but are not limited to, N, P, K or combination products thereof. Suitable secondary nutrients include, but are limited to, calcium, magnesium and sulfur. Suitable micro nutrients include, but are not limited to, boron, copper, iron, manganese, molybdenum and zinc. The exemplary fertilizers include, but are not limited to, urea, ammonium nitrate, diammonium phosphate, monoammonium phosphate, potash, potassium chloride, ammonium sulfate, and potassium sulfate.
[0024] The present invention also provides a method for producing the multifunctional controlled release fertilizer with multiple layers. In one embodiment, the coating process is done in a fluidized bed to achieve film coating uniformity. The coating process first provides urea particles as the cores, then coat the core urea particles with a layer composed of urea and one or more nutrients for fruit growth, then add another layer composed of urea and one or more nutrients for flower growth, and finally wrap with another layer composed of urea and one or more nutrients for leaf growth. The percentages of nutrients in each layer are determined by the applications to specific crops, and the thickness of each layer is correlated with the desired duration of release for each phase. It is desired that the thickness of each layer is in the range of micrometer up to centimeter. [0025] Optionally, each layer further comprises one or more bio-degradable or chemically-modified water-soluble polymers to further control the release rate and duration. Moreover, each layer can be separately coated with one or more coating layers that are formed by one or more bio-degradable polymers and/or one or more chemically- modified water-soluble polymers so as to fine tune the release rate and duration. The suitable polymers include, but are not limited to, alkyd resins, drying oils and modified oils, vinyl reins (e.g., poly(vinyl acetate) and poly(vinyl acetal)), acrylic polymers (e.g., poly(methyl acrylate)), polyesters (e.g., poly(alkylene terephthalate)), epoxy resins (e.g., poly(propylene oxide)), polyamides (e.g., polycaprolactam)), polycarbonates (e.g., poly(alkylene carbonate, polyethylene and its copolymers.
[0026] Now referring to FIG 2, there is provided a schematic diagram showing a package with two different sized fertilizer particles in accordance with one embodiment of the present invention. As shown in FIG 2, the fertilizer package 200 comprises large sized particles 202 and small sized particles 201. The large and small particles are preferably manufactured for the same crop; in addition, they can also be composed of the same layers with different thickness, or they can comprise fewer layers so as to provide extra fertilizer for any specific phases of crop growth. During packaging, the small ones will occupy the spaces left by the large ones; therefore, the fertilizers can be compactly packed, providing effective packaging of the fertilizers.
[0027] The present invention has many advantages over the conventional type, such as reducing the rate of fertilizer removal from soil by rain or irrigation water, sustaining the supply of fertilizer or minerals for a prolonged time, increasing efficiency of the fertilizer, lowering the frequency of application in accordance with normal crop requirement and minimizing potential negative effects associated with over dosage. The present invention can lead to one harvest one application.
[0028] While the present invention has been described with reference to particular embodiments, it will be understood that the embodiments are illustrative and that the invention scope is not so limited. Alternative embodiments of the present invention will become apparent to those having ordinary skill in the art to which the present invention pertains. Such alternate embodiments are considered to be encompassed within the scope of the present invention. Accordingly, the scope of the present invention is defined by the appended claims and is supported by the foregoing description.

Claims

What is claimed is: 1. A multilayer controlled release fertilizer, comprising:
a plurality of layers which contain one or more nutrients for growth of leaf, flower, fruit; and
a core particle;
wherein the core particle is sequentially coated with a plurality of layers containing one or more crop nutrients to produce the multilayer controlled release fertilizer that provides the nutrients to meet the needs of crop growth in different phases.
2. A multilayer controlled release fertilizer, comprising:
an outmost layer comprising one or more nutrients for leaf growth;
a middle layer comprising one or more nutrients for flower growth;
an inner layer comprising one or more nutrients for fruit growth; and
a core particle;
wherein the core particle is sequentially coated with the inner layer, the middle layer and the outmost layer to produce the multiplayer controlled release fertilizer that provides the nutrients to meet the needs of crop growth in different phases.
3. The multilayer controlled release fertilizer of claim 2, wherein the outmost layer is composed of urea and the one or more nutrients for leaf growth, the middle layer is composed of urea and the one or more nutrients for flower growth, the inner layer is composed of urea and the one or more nutrients for fruit growth, and the core particle is composed of urea.
4. The multilayer controlled release fertilizer of claim 1 or 3, wherein the one or more nutrients are selected from N, P, K or combination products thereof, calcium, magnesium, sulfur, boron, copper, iron, manganese, molybdenum, zinc, urea, ammonium nitrate, diammonium phosphate, monoammonium phosphate, potash, potassium chloride, ammonium sulfate, and potassium sulfate.
5. The multilayer controlled release fertilizer of claim 1, wherein one or more of the outmost layer, middle layer, inner layer or core further comprises one or more biodegradable or chemically-modified water-soluble polymers;
wherein the addition of the polymers provides additional control the release rate and duration.
6. The multilayer controlled release fertilizer of claim 2, wherein the plurality of layers or core further comprises one or more bio-degradable or chemically-modified water- soluble polymers;
wherein the addition of the polymers provides additional control the release rate and duration.
7. The multilayer controlled release fertilizer of claim 5 or 6, wherein the bio- degradable or chemically-modified water soluble polymers are selected from the group consisting of alkyd resins, drying oils and modified oils, vinyl reins (e.g., polyvinyl acetate) and polyvinyl acetal)), acrylic polymers (e.g., poly(methyl acrylate)), polyesters (e.g., poly(alkylene terephthalate)), epoxy resins (e.g., poly(propylene oxide)), polyamides (e.g., polycaprolactam)), polycarbonates (e.g., poly(alkylene carbonate, polyethylene and its copolymers.
8. The multilayer controlled release fertilizer of claim 1, wherein the plurality of layers or core are separately coated with one or more coating layers that are formed by one or more bio-degradable polymers and/or one or more chemically-modified water-soluble polymers;
wherein the coating layers fine tune the release rate and duration
9. The multilayer controlled release fertilizer of claim 2, wherein one or more of the outmost layer, middle layer, inner layer or core are separately coated with one or more coating layers that are formed by one or more bio-degradable polymers and/or one or more chemically-modified water-soluble polymers;
wherein the coating layers fine tune the release rate and duration.
10. The multilayer controlled release fertilizer of claim 8 or 9, wherein the biodegradable or chemically-modified water soluble polymers are selected from the group consisting of alkyd resins, drying oils and modified oils, vinyl reins (e.g., poly(vinyl acetate) and poly(vinyl acetal)), acrylic polymers (e.g., poly(methyl acrylate)), polyesters (e.g., poly(alkylene terephthalate)), epoxy resins (e.g., poly(propylene oxide)), polyamides (e.g., polycaprolactam)), polycarbonates (e.g., poly(alkylene carbonate, polyethylene and its copolymers.
1 1. A method for a multilayer controlled release fertilizer, said method comprising the steps of:
providing urea particles as cores in a fluidized bed;
coating the core urea particles with an inner layer comprising urea and one or more nutrients for fruit growth;
coating over the inner layer a middle layer comprising urea and one or more nutrients for flower growth; and
coating over the middle layer an outmost layer comprising urea and one or more nutrients for leaf growth;
thereby the multilayer controlled release fertilizer is made.
12. The method of claim 1 1, wherein the one or more nutrients are selected from N, P, K or combination products thereof, calcium, magnesium, sulfur, boron, copper, iron, manganese, molybdenum, zinc, urea, ammonium nitrate, diammonium phosphate, monoammonium phosphate, potash, potassium chloride, ammonium sulfate, and potassium sulfate.
13. A fertilizer package comprises at least two types of the multilayer controlled release fertilizer of claim 1 or 2, wherein one of the at least two types of the multilayer controlled release fertilizer is large-sized, and the other is small-sized, and the small-sized fertilizer fits into the spaces of the large-sized fertilizer; thereby the fertilizers are compactly packed.
PCT/MY2012/000114 2011-04-05 2012-05-29 Multilayer controlled release fertilizer and method for producing the same WO2012138210A1 (en)

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CN103193546A (en) * 2013-04-26 2013-07-10 山东省农业科学院高新技术研究中心 Special double-membrane inorganic fertilizer for peanuts
CN103204743A (en) * 2013-04-26 2013-07-17 赵阳臣 Method and equipment for producing slow-release compound fertilizer from manganese ore tailings
CN105924294A (en) * 2016-05-10 2016-09-07 安徽金帝豪肥业有限公司 Slow release fertilizer for peanuts
CN105967868A (en) * 2016-05-10 2016-09-28 安徽金帝豪肥业有限公司 Controlled-release fertilizer for germination stage of peanuts
CN105967867A (en) * 2016-05-10 2016-09-28 安徽金帝豪肥业有限公司 Controlled-release fertilizer for growth stage of peanuts
CN106007892A (en) * 2016-05-10 2016-10-12 安徽金帝豪肥业有限公司 Controlled-release fertilizer for fruiting stage of peanuts
CN106007893A (en) * 2016-05-10 2016-10-12 安徽金帝豪肥业有限公司 Controlled-release fertilizer for flowering stage of peanuts
CN107337571A (en) * 2017-08-25 2017-11-10 商洛学院 A kind of kadsura longepedunculata slow-release compound fertilizer
CN107840760A (en) * 2017-11-29 2018-03-27 深圳市芭田生态工程股份有限公司 It is a kind of to be used to adjust composite fertilizer of soil function and preparation method thereof
CN108586060A (en) * 2018-06-25 2018-09-28 山东农业大学 It is a kind of using polyolefin-wax as the functional form composite coated controlled-release of priming coat fertilizer and its production method
CN109548740A (en) * 2018-10-12 2019-04-02 江苏大北农水产科技有限公司 Reduce the device and method of breeding water body ammonia and nitrogen pollution
CN112062646A (en) * 2020-09-14 2020-12-11 江云 Chili slow-release fertilizer and preparation and application methods thereof
CN113480373A (en) * 2021-08-13 2021-10-08 贵州省烟草科学研究院 Full-degradable coated carbon-based double-ring-layer rod fertilizer for cigarettes and preparation method thereof
CN114163284A (en) * 2022-01-21 2022-03-11 黑龙江省昊千生物科技有限公司 Flushing compound fertilizer uniformly applied by oil dispersion and production processing device thereof

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EP0364624A1 (en) * 1987-07-09 1990-04-25 Kuwait Institute For Scientific Research Multilayer degradable and controlled release of multinutrient mulch film and process for preparing same
WO2006022797A2 (en) * 2004-08-06 2006-03-02 Florikan E.S.A. Corporation Compositions for the staged release of nutrients to plants
WO2007022732A1 (en) * 2005-08-26 2007-03-01 Nanjing University Of Science And Technology A composite slow-release coated fertilizer without environmental pollution

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DE3600704A1 (en) * 1986-01-13 1987-07-16 Sueddeutsche Kalkstickstoff Granulated slow-release nitrogen fertiliser, and process for its preparation
EP0364624A1 (en) * 1987-07-09 1990-04-25 Kuwait Institute For Scientific Research Multilayer degradable and controlled release of multinutrient mulch film and process for preparing same
WO2006022797A2 (en) * 2004-08-06 2006-03-02 Florikan E.S.A. Corporation Compositions for the staged release of nutrients to plants
WO2007022732A1 (en) * 2005-08-26 2007-03-01 Nanjing University Of Science And Technology A composite slow-release coated fertilizer without environmental pollution

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103193546A (en) * 2013-04-26 2013-07-10 山东省农业科学院高新技术研究中心 Special double-membrane inorganic fertilizer for peanuts
CN103204743A (en) * 2013-04-26 2013-07-17 赵阳臣 Method and equipment for producing slow-release compound fertilizer from manganese ore tailings
CN103193546B (en) * 2013-04-26 2014-11-05 山东省农业科学院生物技术研究中心 Special double-membrane inorganic fertilizer for peanuts
CN105924294A (en) * 2016-05-10 2016-09-07 安徽金帝豪肥业有限公司 Slow release fertilizer for peanuts
CN105967868A (en) * 2016-05-10 2016-09-28 安徽金帝豪肥业有限公司 Controlled-release fertilizer for germination stage of peanuts
CN105967867A (en) * 2016-05-10 2016-09-28 安徽金帝豪肥业有限公司 Controlled-release fertilizer for growth stage of peanuts
CN106007892A (en) * 2016-05-10 2016-10-12 安徽金帝豪肥业有限公司 Controlled-release fertilizer for fruiting stage of peanuts
CN106007893A (en) * 2016-05-10 2016-10-12 安徽金帝豪肥业有限公司 Controlled-release fertilizer for flowering stage of peanuts
CN107337571A (en) * 2017-08-25 2017-11-10 商洛学院 A kind of kadsura longepedunculata slow-release compound fertilizer
CN107840760A (en) * 2017-11-29 2018-03-27 深圳市芭田生态工程股份有限公司 It is a kind of to be used to adjust composite fertilizer of soil function and preparation method thereof
CN108586060A (en) * 2018-06-25 2018-09-28 山东农业大学 It is a kind of using polyolefin-wax as the functional form composite coated controlled-release of priming coat fertilizer and its production method
CN108586060B (en) * 2018-06-25 2021-08-13 山东农业大学 Functional composite coated controlled-release fertilizer with polyolefin wax as base coat and production method thereof
CN109548740A (en) * 2018-10-12 2019-04-02 江苏大北农水产科技有限公司 Reduce the device and method of breeding water body ammonia and nitrogen pollution
CN112062646A (en) * 2020-09-14 2020-12-11 江云 Chili slow-release fertilizer and preparation and application methods thereof
CN113480373A (en) * 2021-08-13 2021-10-08 贵州省烟草科学研究院 Full-degradable coated carbon-based double-ring-layer rod fertilizer for cigarettes and preparation method thereof
CN113480373B (en) * 2021-08-13 2024-01-23 贵州省烟草科学研究院 Preparation method of fully-degradable coated carbon-based double-ring-layer bar fertilizer for cigarettes
CN114163284A (en) * 2022-01-21 2022-03-11 黑龙江省昊千生物科技有限公司 Flushing compound fertilizer uniformly applied by oil dispersion and production processing device thereof

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