the major downstream demand for phosphorus ore comes from phosphate fertilizer production. the main subdivisions of phosphate fertilizers are monoammonium phosphate (map) and diammonium phosphate (dap), with market share accounting for over 80% of fertilizer consumption. china's total output of phosphate fertilizer accounts for about 34% of the world's total, ranking first. one-quarter to one-third of phosphate fertilizer were exported to india, brazil and australia, etc. as china has implemented the "zero fertilizer zero growth" policy in recent years, the growth of phosphate fertilizers in china is limited, so the international market has a greater impact on the degree of phosphorus fertilizer boom. the domestic dap is mainly exported to india, while map is mainly exported to brazil.