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我州磷肥大面积推广施用是从1964年开始的,当年全州推广1.2万多吨,施用面积达20多万亩。到1974年,数量接近八万吨,按全州耕地计算,平均每亩施用21公斤。在推广使用的磷肥中,普钙约占三分之二,钙镁磷占三分之一。关于钙镁磷的肥效和使用技术问题,自1964年以来,我州各县农技部门配合农村社队科技组,先后做了一些工作。在个旧、建水、石屏、蒙自、弥勒等九个县(市)72个点1400亩耕地上的试验示范表
Large-scale promotion and application of phosphate fertilizer in our country started from 1964, when the whole country promoted more than 12,000 tons and applied area reached more than 20 million mu. By 1974, the number was nearly 80,000 tons, calculated on the basis of the statewide arable land, with an average of 21 kg per acre. In the promotion of the use of phosphate fertilizer, about two-thirds of calcium, calcium and magnesium phosphate accounted for one-third. On the magnesium and phosphorus fertilizer efficiency and the use of technical problems, since 1964, county agricultural departments with the rural community team technology group, has done some work. In Gejiu, Jianshui, stone screen, Mengzi, Maitreya and other nine counties (cities) 72 plots 1400 acres of arable land on the pilot demonstration table