氮肥品种中尿素具有较多优点。其化学性质稳定,易于贮存;含氮量高达46%,便于长途运输;颗粒状、不易结块,施用方便。了解尿素施入土壤后的变化,可以更合理的施用。在土壤中的转化尿素中的氮是以酰胺态存在(有机态氮),仅叶面能少量吸收,根系不能直接大量吸收。必须转化成铵态氮以后才能被吸收利用。所以尿素可以叶面喷施。据试验,尿素施入土壤15天后,其转化率为82.36%。一般可很快转化成铵离 Urea in nitrogenous fertilizer has many advantages. Its chemical stability, easy to store; nitrogen content up to 46%, easy to transport long distances; granular, easy to agglomerate, easy to apply. Understand the changes of urea applied to the soil, you can use more reasonable. Transformation in soil Nitrogen in urea is present in amide form (organic nitrogen), and only a small amount of foliar uptake is possible, and the roots can not be directly absorbed in large amounts. Must be converted into ammonium nitrogen to be absorbed after use. So urea can foliar spray. According to the test, after 15 days of application of urea into the soil, the conversion rate is 82.36%. Generally can be quickly converted into ammonium