解放以来,随着农业生产和化学工业的发展,化学肥料的用量逐年增加,对提高农作物产量起了重大的作用。在各种化学肥料中以氮肥的增产效果最大,需要量也最多。尤其是水稻,施用氮肥的增产效果更为明显。因此氮素化肥特别是硫酸铵深受农民欢 Since the liberation, with the development of agricultural production and chemical industry, the amount of chemical fertilizers increased year by year, which has played a significant role in improving the crop yield. In a variety of chemical fertilizers to increase the yield of nitrogen fertilizer the largest demand is also the largest. Especially rice, the effect of nitrogen fertilizer application is more obvious. Therefore, nitrogen fertilizers, especially ammonium sulfate, welcomed by farmers