A kind of double chelate liquid fertilizer and its preparation method

Abstract

The invention discloses a double chelating liquid fertilizer, which comprises a sugar alcohol chelating agent, an organic polymer chelating agent, medium and trace element salts, medium and trace element oxides, KOH and water. The preparation method of the present invention is as follows: take sugar alcohol chelating agent and organic polymer chelating agent in proportion, and dissolve them in water; add KOH to promote the dissolution of chelating agent, and dissolve for 5 to 10 minutes; weigh medium and trace elements in proportion Dissolve the salt and trace element oxides in the above solution, stir; react at a constant temperature until the solution is clear; and obtain double chelating liquid fertilizer. Sugar alcohols and organic polymers are used as chelating agents. Compared with single sugar alcohols or amino acid double chelation, it not only ensures that crops can be directly absorbed and utilized, but also ensures the stability of organic polymer chelated products. Sugar alcohols chelate The rapid absorption of substances, and the slow release of organic polymer chelation products, and the synergy between the two can achieve the purpose of synergistic effect of quick-acting and medium-acting release of medium and trace elements.

Description

technical field [0001] The invention relates to a double chelating liquid fertilizer, in particular to a liquid fertilizer with trace elements in a chelated state produced by using double chelating technology. Background technique [0002] With the continuous improvement of crop yield and multiple cropping index, people have the "bad habit" of unbalanced fertilization for a long time, and macronutrients such as nitrogen, phosphorus, and potassium are supplemented excessively, while the medium and micronutrient nutrients taken away by crops are not systematically replenished. Supplement, resulting in the lack of medium and micronutrient crops, the soil area is increasing, and the problem is becoming more and more serious. The average percentage of available zinc content in soils in northeast, north and northwest regions below the critical value (0.5mg / kg) was 71.1%; the average percentage of available manganese content in northern soils below the critical value (4.0mg / kg) was...

AI Technical Summary

Problems solved by technology

Due to these problems in the chelating process of different chelating agents, humic acid exists as a chelating agent: (1) crops with different molecular weights are not easy to absorb; (2) poor chelating ability, chelated compounds are unstable; (3) Not applicable to international organic agriculture

Amino acid is used as a chelating agent in the chelation of trace elements: (1) easy to decompose under visible light, easy to flatulence; (2) different sources of amino acids; the effect is quite different; (3) poor chelating ability, chelated compounds are unstable; (4) Only sugar alcohols are used as chelating agents, sugar alcohols are small molecules, similar to amino acid chelation, and chelated products are unstable; (5) domestic sources of relevant trace elements are all inorganic salts (sulphate, nitric acid) salt, chloride)

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