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Potassium Polyacrylate is potassium based SAP, it mainly used for agriculture for 3 advantages:
- Potassium(Kalium) has a beneficial effect on plants;
- Potassium polyacrylate will not cause soil salinization;
- Potassium polyacrylate is friendly for nature and environment;
Potassium Polyacrylate Polymer is capable of Saving Water, Fertilizer, Man Power, Improves Nutrient usage ratio, Environment, Soil condition, Money Profits, etc.
Sodium polyacrylate is sodium-based SAP, based on Sodium polyacrylate, we can make many consumer products.
It is primarily used as a thickening agent because of its unique ability to absorb and hold onto water molecules, making it ideal for use in diapers and hair gels, and for plants in the garden or potting soil.
It is also used in industrial processes to dissolve soaps by absorbing water molecules.[from Livestrong]
Potassium polyacrylate will not saline soil, will not cause soil salinization, more friendly to soil and environment, so it is better choice for plants.
The reason is that most plants, no matter crops or vegetables, flowers, their growing need NPK at balance, Nitrogen, Phosphorus and Potassium(Kalium), they need little Sodium(Na+), if the dose of Sodium polyacrylate exceed normal and sodium salt will be accumulated in soil and harm plants, cause soil salinization;