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Ph 11.3 Enhances The Solubility Of Potassium Silicate For Liquid Fertilizer, Brendan Fatzinger, Bruce Bugbee
Ph 11.3 Enhances The Solubility Of Potassium Silicate For Liquid Fertilizer, Brendan Fatzinger, Bruce Bugbee
Nutrients
Consistent delivery of up to 1 mM silicon (Si) to the root-zone is beneficial for plant health, but the maximum solubility of silicon is only 1.7 mM between pH 4 and 8. This makes Si difficult to concentrate and add through a proportioner in liquid fertilizer systems. The solubility of Si begins to increase with increasing pH above 9. We added potassium silicate (K2SiO3) and fumed silica (SiO2) to RO water that was pH adjusted to pH 5, 8, 9, 10, or 11 with either KOH or NaOH. Samples were filtered and dried to …