Method for applying hydrogel coatings to embryonic plants

Details Method for applying hydrogel coatings to embryonic plants Method for applying hydrogel coatings to embryonic plants

A - Human Necessities

01

C

A01C 1/06 (2006.01)

Patent

CA 2175732

Method of applying hydrogel coatings to embryonic plants to improve early plant growth, comprising the steps of: (a) first forming a substantially dry coating around individual embryonic plants of a water-soluble hydrogel material in powder form, said material being capable of cross-linking reaction with polyvalent metal ions; (b) next introducing the coated plants into a water bath free of polyvalent metal ions to partially hydrate the coatings; (c) rapidly thereafter and before said coatings are fully hydrated, modifying said bath by dispersing cross- linking polyvalent metal ions therein; (d) limiting the contact time of the coated plants with the modified bath so that the polyvalent metal ions diffuse into the coatings and form inwardly decreasing concentration gradients wherein, the outer portions of said coatings being more highly cross-linked than the inner portions; and (e) then separating the resulting coated plants from the modified bath, whereby the polyvalent metal ions can redistribute and equilibrate in said coatings so that the resulting coatings throughout are in a partially cross- linked condition.

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