| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a granular mixed fertilizer which consists of granular oyster shell, a granular phosphatic fertilizer, a granular magnesia fertilizer, a granular silica fertilizer and/or a granular humus fertilizer and has good underwater or underground degradability. SOLUTION: The production of this fertilizer comprises: finely crushing oyster shell into powder, adding a water-soluble binder to the powder, kneading and granulating the resulting mixture to obtain granular oyster shell; and mixing the granular oyster shell with one or more fertilizers selected from a granular phosphatic fertilizer, a granular magnesia fertilizer, a granular silica fertilizer and a granular humus fertilizer, in adequate amounts respectively to produce the objective granular mixed fertilizer. This fertilizer contains uniformly mixed fertilizer components and has good underwater or underground degradability and accordingly, is highly effective in plant growth and development.</p> |
