| 摘要 |
The subject of the invention is a composition containing at least 80 wt. %, with reference to the total weight of the composition, of a magnesium-sulfate-urea compound of Formula (I): [MgSO4.m CO(NH2)2.n H2O]  (I), in which m is in the range from 0.9 to 1.1 and n is in the range from 2.1 to 3.1, where the composition, with reference to the total weight of the composition, contains less than 10 wt. % free MgSO4 in the form of the anhydrate or in the form of urea-free hydrates of the magnesium sulfate, such as magnesium sulfate or magnesium-sulfate hexahydrate and/or less than 10 wt. % uncombined urea. In particular, m in Formula (I) indicates the value 1. In particular, n in Formula (I) indicates the value 3. The invention also concerns the manufacture of the compositions and their utilization as fertilizers or fertilizer additives. |
