在农村,尿素比碳酸氢铵(简称碳铵)施用普遍,即使在冬季或早春低温时,尿素也常被作为基肥、迫肥施用。但试验表明,冬春低温时节施用尿素的效果远远不及碳酸氢铵,这是因为: 首先,尿素肥效比碳铵缓慢。尿素施入土壤后,要由酰胺态氮转化为铵态氮肥才能被作物 In rural areas, urea is more commonly used than ammonium bicarbonate (referred to as ammonium bicarbonate), and urea is often used as a base fertilizer for fertilizer application, even in low temperatures in winter or early spring. However, tests show that the application of urea in winter and spring low temperature season is far less effective than ammonium bicarbonate, which is because: First of all, urea fertilizer is slower than ammonium bicarbonate. After the urea is applied to the soil, it is converted from amido nitrogen to ammonium nitrogen to be crop