A kind of water-soluble fertilizer containing middle element to promote fruit expansion and preparation method thereof

Abstract

The invention discloses a secondary element containing water soluble fertilizer for promoting fruit expansion and a preparation method of the water soluble fertilizer and belongs to the technical field of water soluble fertilizers. The water soluble fertilizer is prepared from raw materials in parts by weight as follows: 15-30 parts of urea, 6-20 parts of industrial monoammonium phosphate, 30-90 parts of potassium nitrate, 3-10 parts of calcium nitrate, 0.1-1 part of hydrochloric acid and 30-60 parts of deionized water. The preparation method comprises steps as follows: 1, the deionized water is heated to 95-98 DEG C; 2, hydrochloric acid is added in parts by weight, and the mixture is uniformly stirred; 3, the industrial monoammonium phosphate is added in proportion and stirred until the industrial monoammonium phosphate is completely dissolved, and the mixture is uniformly mixed; 4, potassium nitrate and urea are added in proportion and stirred until potassium nitrate and urea are completely dissolved, and the mixture is uniformly mixed; 5, calcium nitrate is added slowly in batches in proportion, and then, the mixture is uniformly stirred; 6, after spray drying, the mixture is cooled, and a finished product is obtained. The fertilizer has the advantages of good grain fineness, high water dissolving speed, high fertilizer nutrient activity and the like.

Description

technical field [0001] The invention belongs to the technical field of water-soluble fertilizers, in particular to a water-soluble fertilizer containing moderate elements to promote fruit expansion and a preparation method thereof, especially to a water-soluble fertilizer containing phosphorus and calcium and capable of promoting fruit expansion and its preparation method. Background technique [0002] Water-soluble fertilizers refer to chemical fertilizers that can completely dissolve in water without residues. They are characterized by high content (total nitrogen, phosphorus, and potassium content ≥ 50%) and less water-insoluble matter (≤ 5%). They are suitable for water-soluble spraying and drip irrigation. A class of chemical fertilizers fertilized in other ways. Most of the water-soluble fertilizers produced by enterprises now use the blending process, that is, the raw materials of different components are crushed and blended together to form the final product. The d...

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Problems solved by technology

The disadvantage of this process is that the different components that make up the fertilizer have different dissolution rates in water. After the fertilizer is put into water, some components dissolve quickly and some components dissolve slowly, which affects the overall dissolution rate.

[0033] The applicant found that the above method not only needs to add an anti-caking agent, but also the solubility of the finished fertilizer is not good, and the coexistence of phosphorus and calcium is not as good as the applicant said

[0034] In addition, in practice, water-soluble fertilizers also have the disadvantage of being difficult to completely mix evenly, and due to time constraints, it is difficult for farmers to wait until the fertilizer is completely dissolved and stirred evenly before starting fertilization operations, resulting in inconsistent fertilization concentrations in different regions, thus Affected the effect