氨水和碳酸氢铵是我县近年来使用的主要氮肥品种。这两种肥料都具有肥效迅速、施入土壤不残留酸根、适应作物和土壤范围广、生产简便、成本低廉等优点,但也有容易挥发,造成肥效损失的缺点。 Ammonia and ammonium bicarbonate are the main nitrogenous fertilizers used by our county in recent years. Both of these fertilizers have the advantages of rapid fertilizer application, no residual acid roots applied to the soil, wide range of crop and soil adaptation, simple and convenient production, low cost and the like. However, these two kinds of fertilizers also have the disadvantage of easy volatilization and loss of fertilizer efficiency.