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

摘要

ab4c2442In 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 T(M1 M2 M3...Mx)(PO) n Ho . wherein T is selected from NH K or CHNO 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.