Classifications

• • C—CHEMISTRY; METALLURGY
  • C05—FERTILISERS; MANUFACTURE THEREOF
  • C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
  • C05F11/00—Other organic fertilisers
  • C05F11/10—Fertilisers containing plant vitamins or hormones
• • 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 relates to controlled-release encapsulated fertilizer. More particularly, the present invention relates to a controlled-release encapsulated fertilizer comprising a core containing at least one fertilizer and a polymeric envelope containing at least one hormone encapsulating said fertilizer Background Art
• aqueous dispersions of pesticide and herbicide micro-capsules are particularly useful in controlled release pesticidal and herbicidal formulations because they can be diluted with water or liquid fertilizer and sprayed using conventional equipment, thereby producing uniform field coverage of the pesticide or herbicide/additives such as film forming agents can be added directly to the finished formulation to improve the adhesion of micro-capsules to foliage. In some cases, reduced toxicity and extended activity of encapsulated herbicides and pesticides have been noted.
• a polymer separates from a solvent solution of the polymer by the action of a precipitating agent that reduces the solubility of the polymer in the solvent (e.g., a salt or a non-solvent for the polymer).
• a precipitating agent that reduces the solubility of the polymer in the solvent (e.g., a salt or a non-solvent for the polymer).
• Patents describing such processes and their shell wall material includes U. S. Patent Nos. 2,800,458 (hydrophilic colloids); 3,069,370 and 3,116,216 (polymers); 3,137,631 (denatured proteins); 3,418,250 (hydrophobic thermoplastic resins); and others.
• British Patent No. 1 ,371 ,179 discloses a process which consists of dispersing an organic pesticide phase containing a poiymethyiene polyphenylisocyanate or toluylene diisocyanate monomer into an aqueous phase.
• the wall forming reaction is initiated by heating the batch to an elevated temperature at which point the isocyanate monomers are hydrolyzed at the interface to form amines, which in turn react with unhydrolyzed isocyanate is the possibility of continued reaction of monomer after packaging. Unless all monomer is reacted during the preparation, there will be continued hydrolysis of the isocyanate monomer with evolution of CO 2 , resulting in the development of pressure when the formulation is packaged.
• U. S. Patent No. 3,577,515 describes a continuous or batch method which requires a first reactant and a second reactant complimentary to the first reactant, with each reactant in separate phases, such that the first and second reactants react at the interface between the droplets to form encapsulated droplets.
• the process is applicable to a large variety of polycondensation reactions, i.e., to many different pairs of reactants capable of interfacial condensation from respective carrier liquids to yield solid film at the liquid interface.
• the resulting capsule skin may be produced as a polyamide, polysulfonamide, polyester, polycarbonate, polyurethane, polyurea or mixtures of reactants in one or both phases so as to yield corresponding condensation copolymers.
• the reference describes the formation of a polyurea skin when diamines or polyamines (e.g. ethylene diamine, phenylene diamine, toluylene diamine, hexamethylene diamine and the like) are present in the water phase and di-isocyanates or polyisocyanates (e.g., toluene diisocyanate, hexamethylene diisocyanate and poiymethyiene polyphenylisocyanate) are present in the organic/oil phase.
• diamines or polyamines e.g. ethylene diamine, phenylene diamine, toluylene diamine, hexamethylene diamine and the like
• di-isocyanates or polyisocyanates e.g., toluene diisocyanate, hexamethylene diisocyanate and poiymethyiene polyphenylisocyanate
• the world's nursery industry utilizes numerous products and techniques in order to maintain and produce millions of ornamental plants and fruit trees.
• the nursery industry uses sophisticated agrotechnologies and consumes large quantities of rooting stimulators.
• novel products that could increase rooting percentages of difficult-to-root (mainly woody or semi-woody plant species) plants.
• a common procedure in a nursery entails the sporadic addition of fertilizers and hormones to the roots of new cuttings.
• the present inventors have found that the addition of a controlled-release encapsulated fertilizer can maintain the presence of the necessary compounds for the entire period of rooting and development of rooted plants. Disclosure of the Invention
• a controlled-release encapsulated fertilizer comprising a core containing at least one fertilizer and a polymeric envelope containing at least one hormone encapsulating said fertilizer.
• said envelope contains at least one hormone selected from the group consisting of Auxin; indole alkyl acid; indole acetic acid(IAA); indole propionic acid(IPA); indole butyric acid(IBA); 2,4 dichlorophenoxy acetic acid; 2,4 chlorophenoxy propionic acid; 2,4 dichloro phenoxyacetic acid propyl ester; and, Naphthalene acetic acid.
• a process for encapsulating a fertilizer comprising: a) coating a fertilizer with a mixture of a first monomer and a hormone; b) adding a mixture of a second monomer and additional a hormone; and, c) heating said mixtures to induce the polymerization of said first and second monomers to form a polymeric envelope incorporating said hormone and encapsulating said fertilizer.
• said envelope contains at least one hormone selected from the group consisting of Auxin; indole alkyl acid; indole acetic acid(IAA); indole propionic acid(IPA); indole butyric acid(IBA); 2,4 dichlorophenoxy acetic acid; 2,4 chlorophenoxy propionic acid; 2,4 dichloro phenoxyacetic acid propyl ester; and, Naphthalene acetic acid.
• said polymeric envelope is formed by a polymer selected from the group consisting of polyurethane; polyurea; and, polyolefins.
• a series of formulations were prepared according to the present invention.
• the fertilizer is the core of the formulation and the hormone is incorporated in the envelope.
• the hormones that were incorporated in the slow release formulations were from the following families: • Auxin- Indole alkyl acid IAA (Indole alkyl acid) ,
• IPA Indole Propionic Acid
• IBA Indole Butynic Acid
• NAA Naphthalene acetic acid
• Triazole - Paclobutrazole growth retardant that has an anti- gibberllin-enhanching effect on stimulation of root formation and increasing survival of rooted pland grown in stress conditions.
• the coating consists of the following families of polymers:
• Carbohydrates such as sucrose, starch, etc. that are enhancing auxin effect on stimulation of root regeneration and development are added to the envelope.
• Other materials that are added to the formulation are to increase the nutritional content (micro elements such as: Fe, B, Mg, Zn, Mn, Ca, Mo, etc.), to increase biotic tolerance (Benedate), Falpane, Merpan, Prochloraz, propionazol, diazinone, nephorex, etc), and to increase a biotic togruace of the plants (triazole compounds such as majic that increase drought resistance by stimulation of wax cover of the leaves).
• the above mentioned hormones increase the rate of cell division and differentiation and the result of said increased rate is a stimulation of root regeneration and development.
• Growth retardants such as Triazole e.g. paclobutrazole can also be added. Said retardant has an anti-gibberllin-enhancing auxin effect on stimulation of root formation.
• Other materials that are added to the formulation are to increase biotic (pathogens) and abiotic (drought) tolerance of plants.
• Hormones can also be added to the core if desired. Procedure:
• the granules of fertilizer were put in a coating pan and one monomer with- part of the hormone was added.
• the coating pan rotated until the granules were covered with one monomer containing part of the hormones, then a second monomer with the rest of the hormones and catalyst were added.
• the coating pan rotated and the mixture was heated up to 50 °C. When the condensation polymerization ended, and when the granules are not sticky, talcum was added followed by melted wax.
• the coating pan was rotated continuously. The formulation is then put in bags.
• Type Amount type aiiHHint Talc, g Wax, g reitilizer % Polyethylene %
• Each cutting was put in a vessel with special earth and with 3 granules, the cuttings were put in green houses. The amount of roots and the length of the roots were measured.
• the plants utilized included were Phelargonium: roses, melloloica, olives from different clutivars, eucalyptus of different kinds and many others.
• Root svstem development ladder
• the release rate was determined by the following method, one gram of the granules were placed in a dissolution system. Samples were taken from the vessels and the amount released was determined in the following way: the amount of the fertilizer by conductometeric method and the amount of the hormone by HPLC.
• the formulations were found to be most effective in: accelerating root formation, increasing rooting percentage, improving the quality of root system, and stimulation of young plant (vegetative and reproductive) development in comparison to untreated control and IBA talc powder (the common substance used at present for rooting in all nurseries).

Landscapes

• Life Sciences & Earth Sciences (AREA)
• Chemical & Material Sciences (AREA)
• Organic Chemistry (AREA)
• Pest Control & Pesticides (AREA)
• Botany (AREA)
• Fertilizers (AREA)
• Agricultural Chemicals And Associated Chemicals (AREA)

Applications Claiming Priority (3)

Publications (1)

Family

ID=11070478

Family Applications (1)

Country Status (6)

Families Citing this family (12)

Family Cites Families (4)

• 1997
  • 1997-08-07 IL IL12149697A patent/IL121496A/en not_active IP Right Cessation
• 1998
  • 1998-07-09 WO PCT/IL1998/000322 patent/WO1999007654A1/en not_active Application Discontinuation
  • 1998-07-09 EP EP98932486A patent/EP1012129A1/de not_active Withdrawn
  • 1998-07-09 AU AU82390/98A patent/AU741233B2/en not_active Ceased
  • 1998-07-09 CA CA002299334A patent/CA2299334A1/en not_active Abandoned
  • 1998-07-09 NZ NZ502497A patent/NZ502497A/en unknown

Non-Patent Citations (1)

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