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液氨是一种无载体液态氮素化肥,具有肥效高(含氮量82.3％),肥效长,成本低,适宜机械化作业,经济效益高等优点。国外在四十年代就开始推广使用,目前美国施用液氨的数量占全国氮肥总用量的40％左右。我国于六十年代中期,在浙江嘉兴稻田进行试验,取得良好效果。1977、1978年,北京双桥农场、河北芦台农场等相继在小麦、水稻、蔬菜、苹果上使用,均取得了增产、增收、节支等显著效果。
Liquid ammonia is a carrier-free liquid nitrogen fertilizer, with high fertilizer efficiency (nitrogen content of 82.3%), fertilizer efficiency, low cost, suitable for mechanized operations, the advantages of high economic efficiency. Abroad in the 1940s began to promote the use of the current number of liquid ammonia in the United States accounting for the total amount of nitrogen fertilizer around 40%. In the mid-1960s, China experimented in paddy fields in Jiaxing, Zhejiang Province and achieved good results. In 1977 and 1978, Shuangqiao Farm in Beijing and Lutai Farm in Hebei Province all used wheat, rice, vegetables and apples one after another, and achieved remarkable results of increasing production, increasing income and saving expenses.