The results obtained indicated that the urea hydrolysis rates by MRU were significantly higher than that by MNA although the urea hydrolysis rates by toth methods were well correlated.

• 结果表明：虽然这两种方法在反映土壤脲酶活性和尿素水解速率上有相同趋势，但直接法测定的结果显著高于间接法。