研究尿素在土壤中分解、转化以及损失的途径,需要寻求一种能直接定量测定尿素氮的回收方法。一般传统测定方法是间接差减法。而施入土中的尿素及其提取过程,都处在脲酶作用的不断水解 Research urea decomposition in the soil, transformation and loss of ways, need to find a direct quantitative determination of urea nitrogen recovery method. The traditional method of determination is indirect subtraction method. Urea applied to the soil and its extraction process, are in the continuous hydrolysis of urease