Preparations with improved urease inhibitory effect and fertilizers containing urea containing them

摘要

Preparation containing at least two different triamides of phosphoric acid (thio) with structures according to the general formula (I), R1R2N-P (X) (NH2) 2 (I), in which X represents oxygen or sulfur, R1 represents a C1-C10 alkyl, C3-C10 cycloalkyl, C6-C10 aryl or dialkylaminocarbonyl group and R2 represents hydrogen, or R1 and R2 together with the nitrogen atom that binds them together form a 5 or 6 membered heterocyclic radical, saturated or unsaturated, which may contain 1 or 2 other heteroatoms, chosen from the group consisting of nitrogen, oxygen and sulfur, which differ in at least one of the radicals R1 or R2 and of which one is present in amounts of 20 to 40% by weight and the other is present in amounts of 60 to 80% by weight, based on the total amount of phosphoric acid (thio) triamides in the preparation.