室内分析结果表明，尿素肥料在践东旱地黑垆土中４０天左右即被完全水解转化成铵。在整个水解过程中表现出前期快、中期相对稳定、后期缓馒，前１０天约有６０％的尿素被水解成铵，从第１１天到２０天止，水解总量已达８０％，在最后水解阶段的２０天中，水尽量仅占２０％左右。 Laboratory analysis showed that the urea fertilizer was completely hydrolyzed into ammonium in about 40 days in the black soil of the dry land in the east. In the whole process of hydrolysis showed the early fast, medium-term relatively stable, late slow rice, the first 10 days about 60% of urea is hydrolyzed into ammonium, from the first 11 days to 20 days only, the total amount of hydrolysis has reached 80% in In the final 20 days of the hydrolysis stage, water is only about 20% as much as possible.