建国以来，我国化肥工业得到迅速发展.目前，山西省有化肥企业83个，化肥生产能力达1134万吨。全国和山西农用化肥平均每公顷播种面积施用量分别达到251.2公斤和2O6．5公斤，在农业增产中所起的作用占到30～50％，为农业和国民经济发展做出很大贡献。但是，自1996年下半年以来 Since the founding of the People’s Republic of China, the chemical fertilizer industry in China has developed rapidly. At present, there are 83 chemical fertilizer enterprises in Shanxi Province, and the fertilizer production capacity has reached 11.34 million tons. The average sowing area per hectare of agricultural chemical fertilizers in the country and Shanxi reached 251.2 kg and 26.5 kg respectively, and accounted for 30-50% of the agricultural output increase, which made great contributions to the development of agriculture and national economy. However, since the second half of 1996