According to the national fertilizer registration management method, potassium dihydrogen phosphate is one of a dozen fertilizers that have proven fertilizer efficiency after long-term field use, and does not require a fertilizer registration certificate.
The true authenticity should be marked with a potassium dihydrogen phosphate content (dry basis) ≥ 98%, but not a product with a total content of ≥98%, or other confounding concepts such as total material content ≥98%.
Some products even have a potassium dihydrogen phosphate content of 98%, but in fact they are also unqualified products, because the potassium oxide content (K2O) in the product is specified in the standard of potassium dihydrogen phosphate product (HG2321-92). Must meet: K2O ≥ 33.2%. Because of the inclusion of other phosphorus-containing substances, the amount of phosphorus on the surface is reached, but the potassium (K2O) content is generally low. Whether the potassium content is up to standard or not is the key to the effect of potassium dihydrogen phosphate application, which is because the reasonable ratio of phosphorus to potassium in potassium dihydrogen phosphate makes the effect very good.
Authentic potassium dihydrogen phosphate is relatively high in price due to its high effective nutrient content. If the product with a very low price is a counterfeit product, be sure to pay attention when purchasing it. Because such fakes are easy to counterfeit, although they will not cause great harm to crops, they have spent money and energy without receiving the effect of increasing production and income.
This article URL: Some matters to be noted in the purchase of potassium dihydrogen phosphate
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