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复(混)合肥具有养分全、含量高、肥效较持久、能节省贮运成本与施用方便等优点。近几年来,世界各国复(混)合肥生产发展较快,施用量占化肥总量的50%,一些生产发达的国家更高,如美国、加拿大等国占70%,印度也占27%。我国对复合肥的研制与生产起步较晚,1988年复(混)肥仅占化肥总量的5%。为促进农业增产,从1985年起,由四川省农科院土肥所、省化工厅化肥公司组成复肥领导小组,组织省内有关化肥工厂,开始试制、生产有氮、磷、钾含量20—25%,40—50%的三复(混)肥并在主要土
Complex (mixed) Hefei has nutrients, high levels, more lasting fertilizer, storage and transportation costs can be saved and the advantages of convenience. In recent years, Hefei’s production has been growing rapidly in various countries in the world. The amount of fertilizer used accounts for 50% of the total fertilizer output. Some developed countries are even higher. For example, the United States, Canada and other countries account for 70% of the total, while India also accounts for 27%. The development and production of compound fertilizer started relatively late in our country. In 1988, compound fertilizer only accounted for 5% of the total amount of chemical fertilizer. In order to promote agricultural production, from 1985, Sichuan Provincial Academy of Agricultural Sciences, soil and fertilizer by the Provincial Department of Chemical Fertilizer Company formed a leading group of compound fertilizers, organize the province’s fertilizer plant, trial production, production of nitrogen, phosphorus and potassium 20- 25%, 40-50% of the three complex (mixed) fertilizer and in the main soil