1忌铵态氮肥与碱性肥料混施。铵态氮肥与碱性肥料易发生化学反应，降低肥效。碳酸氢铵、硫酸铵、磷酸铵等都是铵态氮肥，碱性肥料如钙镁磷肥、草木灰等。2忌碳酸氢铵浅施。碳酸氢铵极不稳定，在常温下易分散，施用时深度要大于6cm，并要立即盖土。3忌尿素施用后立即浇水。尿素 Avoid ammonium nitrogen fertilizer and alkaline fertilizer mixed facilities. Ammonium nitrogen fertilizer and alkaline fertilizer prone to chemical reaction, reduce fertilizer. Ammonium bicarbonate, ammonium sulfate, ammonium phosphate are ammonium nitrogen fertilizer, alkaline fertilizer such as calcium magnesium phosphate, ash and other plants. 2 Avoid ammonium bicarbonate shallow facilities. Ammonium bicarbonate is very unstable, easily dispersed at room temperature, when applied to a depth greater than 6cm, and to immediately cover the soil. 3 to avoid urea immediately after watering. Urea