Compositions for sustained release of agricultural macronutrients and process thereof
AssigneeSri Lanka Institute of Nanotechnology (PVT) Ltd.
InventorsKottegoda Nilwala, Imalka Munaweera, A. Nadeesh Madusanka, Veranja Karunaratne
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Abstract
A macronutrient sustained release composition for a plant locus containing a nanocomposite wherein a nitrogen containing macronutrient compound adsorbed on the surface of hydroxy apatite phosphate nanoparticles is intercalated within the interlayer spacing of a nanoclay. The nanocomposite containing the adsorbed macronutrient compounds is slowly released in a sustained manner when contacted with an acidic soil.
Claims20
A macronutrient sustained release composition for a plant locus comprising a nitrogen containing macronutrient compound adsorbed on the surface of hydroxy apatite phosphate nanoparticles, wherein the macronutrient adsorbed hydroxy apatite phosphate nanoparticles are substantially intercalated within the interlayer spacing of a nanoclay to form a nanocomposite, and wherein the adsorbed macronutrient compounds are slowly released in a sustained manner to an acidic soil.
A method of macronutrient sustained release to a plant locus comprising:
- a. providing a nanocomposite having nitrogen containing macronutrient compound adsorbed on the surface of hydroxy apatite phosphate nanoparticles, wherein the macronutrient adsorbed hydroxy apatite phosphate nanoparticles are substantially intercalated within the interlayer spacing of a nanoclay;
- b. contacting said nanocomposite with an acidic soil;
- and
- c. releasing the macronutrient compound adsorbed on the surface of the hydroxy apatite phosphate nanoparticles in a slow and sustained manner to the acidic soil.
A process for preparing a macronutrient sustained release composition comprising;
- a. providing hydroxy apatite phosphate nanoparticles and a nanoclay with an interlayer spacing;
- b. contacting the hydroxy apatite phosphate nanoparticles with a nitrogen containing macronutrient to form macronutrient adsorbed on the surface of hydroxy apatite phosphate nanoparticles;
- and
- c. intercalating the macronutrient adsorbed on the surface of hydroxy apatite phosphate nanoparticles within the interlayer spacing of the nanoclay.
Dependencies are inferred from the claim text.