上海郊区每年氮素化肥使用量达到73～75万吨,平均每一熟作物使用量85kg/亩,有的地方超过100kg/亩,其中主要是碳酸氢铵。该肥料易挥发,氮素损失量大,吸收利用率不高,而且容易灼伤农作物,施肥很不方便。笔者针对碳酸氢铵肥料存在的问题,在其中加入一定量的添加剂,研制成两种剂 The annual nitrogenous fertilizer use in Shanghai’s suburbs reached 73 to 750,000 tons, with an average of 85kg / mu for each crop and more than 100kg / mu in some places, mainly ammonium bicarbonate. The fertilizer is volatile, nitrogen loss, absorption and utilization rate is not high, and easy to burn crops, fertilization is very convenient. The author of ammonium bicarbonate fertilizer problems, which add a certain amount of additives, developed into two kinds of agents