为解决我省肥料结构中重氮、少磷、缺钾的问题,我们在省科委和有关业务部门的大力支持下,于1990年开展了生物肥料的研制与应用试验。经过两年多的探索,我们利用微生物固氮和活化土壤中磷、钾元素的原理,采用科学配方,研制出“923复合菌肥”,并在水稻、红薯、玉米上进行了试验,? In order to solve the problem of diazo, phosphorus and potassium deficiency in the fertilizer structure of our province, we carried out the experiment of the research and application of biological fertilizers in 1990 with the strong support of the Provincial Science and Technology Commission and relevant business departments. After more than two years of exploration, we used the principle of nitrogen fixation of microorganisms and activation of phosphorus and potassium in the soil. Using scientific formula, we developed “923 compound fertilizer” and conducted experiments on rice, sweet potato and corn.