Potassium Nitrate Fertilizers
- Potassium Nitrate is a colourless crystal or white powder.
- It is mainly applied in agriculture (compound fertilizer and foliar spray fertilizer); drugs and catalyzer; ceramics and enamel; etc.
Components | |
KNO3 | 99.4% min |
Potassium Oxide(as K2O) | 46.0% min |
Nitrogen | 13.0% min |
Moisture | 0.1% max |
Sulphate(as SO4) | 0.01% max |
Chloride(as Cl) | 0.03% max |
Iron (as Fe) | 0.002% max |
Magnesium(as Mg) | 0.004% max |
Heavy Metal(as Pb) | 0.001% max |
Clarity of Solution | qualified |
Packaging
- Packed in 25 and 50 kgs pp woven bags.
Agricultural use
Growers value fertilizing with KNO₃ especially in conditions where a highly soluble, chloride-free nutrient source is needed. In such soils, all of the N is immediately available for plant uptake as nitrate, requiring no additional microbial action and soil transformation.
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Growers of high-value vegetable and orchard crops sometimes prefer to use a nitrate-based source of nutrition in an effort to boost yield and quality.
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Potassium nitrate contains a relatively high proportion of K, with an N to K ratio of approximately one to three. Many crops have high K demands and can remove as much or more K than N at harvest.
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Applications of KNO₃ to the soil are made before the growing season or as a supplement during the growing season. A diluted solution is sometimes sprayed on plant foliage to stimulate physiological processes or to overcome nutrient deficiencies.
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Foliar application of K during fruit development advantages some crops, since this growth stage, often coincides with high K demands during the time of declining root activity and nutrient uptake.
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It is also commonly used for greenhouse plant production and hydroponic culture.
Management practices
Both N and K are required by plants to support harvest quality, protein formation, disease resistance and water-use efficiency. Farmers often apply KNO₃ to soil or through the irrigation system during the growing season to support healthy growth.
- The relatively high solubility of KNO₃ under warm conditions allows for a more concentrated solution than for other common K fertilizers. However, farmers must carefully manage the water to keep the nitrate from moving below the root zone.
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