NATURAL COMPOUND FERTILIZER COMPRISING PHOSPHONITRATE CONTAINING A GREATER QUANTITY OF P AND N ELEMENTS AND METHOD FOR ANALYZING PHOSPHONITRATE

摘要

PURPOSE: Provided is a natural compound fertilizer comprising phosphonitrate, which is environmentally friendly with pollution-free and contributes to improve the production efficiency of agriculture. CONSTITUTION: The natural compound fertilizer comprises phosphonitrate containing a greater quantity of P and N elements. The phosphonitrate is a mineral represented by the formula £Ca5(PO4,CN2)3|3OH as an isomer specific to a phosphate ore and comprises 14.17% of P, 29.26% of O, 5.48% of C, 12.80% of N and 7.77% of OH. The phosphonitrate can be identified by analyzing qualitatively the elements of phosphorus and nitrogen according to the method of: determining the change of color after plasticizing; determining the presence of precipitate by heating the sample using HCl and distilled water; carrying out the litmus test; or determining the change of color using (NH4)6Mo7O244H2O, NH3NO3 and HNO3.