Application of potassium pyrophosphate in macroelement solid water-soluble fertilizer and product of potassium pyrophosphate

Abstract

The invention belongs to the technical field of water-soluble fertilizers and particularly relates to application of potassium pyrophosphate in macroelement solid water-soluble fertilizer and a product of potassium pyrophosphate. The macroelement solid water-soluble fertilizer comprises the following components according to percent by weight: 5-95% of potassium pyrophosphate, 0-85% of potassium nitrate, 0-70% of urea, ammonium nitrate or mixture thereof, 0-79% of monoammonium phosphate, diammonium phosphate or mixture thereof, and 0-15% of medium and trace elements. In the invention, the content of potassium pyrophosphate is unconventional and exceeds that of existing products in the market, and the potassium pyrophosphate releases heat when dissolved in water, without causing crop root freeze injury due to water temperature drop; an aqueous solution of potassium pyrophosphate is slightly alkaline and can significantly improve excessive acidity of soil due to annual use of common chemical fertilizers; fertilizer release speed is uniform so that sustained release is achieved; high efficiency and high content enable a reduction in the fertilizer usage, advantages of such as lowering the consumption of chemical fertilizers in department of agriculture are satisfied, and economic and social benefits are significant.

Description

technical field [0001] The invention belongs to the technical field of water-soluble fertilizers, and in particular relates to the application of potassium pyrophosphate in solid water-soluble fertilizers with a large number of elements and the products thereof. Background technique [0002] Water Soluble Fertilizer (WSF for short) is a multi-element compound fertilizer that can be completely soluble in water. It can be quickly dissolved in water, more easily absorbed by crops, and its absorption and utilization rate is relatively high. More importantly, it can be applied to facility agriculture such as sprinkler irrigation, realize the integration of water and fertilizer, and achieve the efficiency of saving water, fertilizer and labor. [0003] At present, most of the mainstream water-soluble fertilizers with large amounts of elements use potassium dihydrogen phosphate as the compound raw material of phosphorus and potassium. Although its application in the integration of ...

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Problems solved by technology

[0003] At present, most of the mainstream water-soluble fertilizers with large amounts of elements use potassium dihydrogen phosphate as the compound raw material of phosphorus and potassium. Although its application in the integration of water and fertilizer is much better than that of compound fertilizers, there are still problems that the solution temperature is too low to frostbite the roots of the crops and the fertilizer efficiency is lost too much. Fast, high potassium content can not achieve more than 60% and many other shortcomings

[0004] Potassium pyrophosphate is a chemical raw material, which is used in high-end liquid fertilizers, but it is not used in the production of powder fertilizers, especially powder water-soluble fertilizers.