CONTROLLED-RELEASE FERTILIZER, PROCESS FOR ITS PREPARATION AND ITS APPLICATION

摘要

A depot fertilizer composition comprising an inorganic matrix and another inorganic and/or organic component of the formula X Me(II)O.[(1-x)/2]Me(III)2O3.YA.zI.aq in which Me (II) is at least one divalent metal, Me(III) is at least one trivalent metal, A is at least one inorganic acid or anhydride of an inorganic acid, I is at least one organic compound, aq is 0-9, X is from 0 to 1, Y is from 0.5 to 0.7, and Z is from 0 to 20, at least one of the components containing a plant nutrient element. The compositions are suited for fertilizing the leaves or full systems of plants growing in soil or in water.