一、试验依据据文献资料,磷矿粉肥直接用于农业生产已有百余年,而科学实验的资料掌握也将近有百年的历史了。一些国家在磷肥施用总量中粉肥约占三分之一。我国于1919年发现磷矿,我省于1953～1956年先后开采遵义、开阳磷矿,进行试验示范。文化大革命以来,探明磷矿产地有20多处,磷矿贮藏量约10亿吨以上。 First, the test basis According to the literature, phosphate rock fertilizer directly used in agricultural production has been more than a hundred years, and scientific experimental data control also has nearly a hundred years of history. Some countries in the total phosphorus fertilizer application of about one-third of fertilizer. China found phosphate rock in 1919, our province in 1953 ~ 1956 mining Zunyi, Kaiyang phosphate rock, pilot demonstration. Since the Cultural Revolution, proven phosphate rock has more than 20 places, phosphate rock reserves of about 1 billion tons.