| 摘要 |
PURPOSE: A foamable siliceous fertilizer composition for cultivating rice crops is provided to add silica which is not in a silicate state and fine kaolin powder as materials for foamable solid fertilizer for facilitating the availability of siliceous fertilizer. CONSTITUTION: A foamable siliceous fertilizer composition for cultivating rice crops contains 30-40wt% of urea, 5-10wt% of potassium chloride, 10-15wt% of silica powder, 10-15wt% of kaolin powder, 12-18wt% of citric acid, 6-12wt% of sodium hydrogen carbonate, 3-5wt% of potassium carbonate, 0.5-2wt% of sodium metaphosphate, 0.4-0.5wt% of minute-amount of an element mixture, 0.2-0.5wt% of yeast, 0.4-2wt% of non-ionic surfactant, 0.01-1wt% of negative-ionic surfactant, and 0.5-5wt% of stearic acid. A producing method of foamable siliceous solid fertilizer for cultivating rice crops comprises the following steps: mixing urea, potassium chloride, potassium carbonate, sodium hydrogen carbonate, the minute-amount of the element mixture, kaolin powder, yeast, non-ionic surfactant, negative-ionic surfactant, and sodium metaphosphate to obtain a first mixture (S100); adding citric acid and silica powder into the first mixture to obtain 100wt% of second mixture (S200); compress-molding the second mixture (S300); and drying the compress-molded product (S400). [Reference numerals] (AA) Foamable siliceous solid fertilizer; (S100) First mixing step; (S200) Second mixing step; (S300) Compress-molding step; (S400) Drying step |
