MIXED METALLIC CRYSTALLINE ORTHOPHOSPHATES FOR THE TEMPORALLY CONTROLLED RELEASE OF TRACE ELEMENTS IN THE RHIZODERMAL AND EPIDERMAL AREAS OF PLANTS

摘要

In order to obtain an improved food stuff composition with respect to prior art, which releases the thus contained nutrients in a time-controlled manner in the rhizodermal and epidermal areas of the plants, the invention proposes a foodstuff composition for plants which contains at least one mixed metallic crystalline orthophosphate of the type [Ta(M1 M2 M3...Mx)b(PO4)c n H2o]. wherein T is selected from NH4, K or CH4N2O - M1, M2, M3... Mx are metals which are selected from Mg, Ca, Mn, Fe, Co, Ni, Cu and Zn, - a = 0 or 1, wherein b = 3, when a = 0, and b = 1 when a = 1, and c = 2 when a = 0, and c = 1 when a = 1, and - 0 ≤ n ≤ 9. The mixed metallic crystalline orthophosphate contains at least two different metals M1, M2, M3... Mx, under the proviso that at least one of said at least two different metals is selected from Mn, Mg and Ca, wherein the total content of Mn, Mg and/or Ca is in the region of 0,5 - 90 mol-% with respect to the total amount of all metals contained in the mixed metal crystalline orthophosphate.