Double-chelate liquid fertilizer and preparation method thereof

Abstract

The invention discloses a double-chelate liquid fertilizer. The double-chelate liquid fertilizer comprises a sugar alcohol chelating agent, an organic polymer chelating agent, medium trace element salt, medium trace element oxide, KOH and water. The preparation method comprises the following steps of: weighing the sugar alcohol chelating agent, and the organic polymer chelating agent according to a proportion, and dissolving into water; adding KOH to prompt the dissolving of the chelating agents, and dissolving for 5-10min; weighing the medium trace element salt and the medium trace element oxide according to the proportion, dissolving into the solution, and stirring; reacting at a constant temperature until the solution is clear, so as to obtain the double-chelate liquid fertilizer. With the sugar alcohol and organic polymer as the chelating agents, compared with double chelating employing single sugar alcohols or amino acids, the direct absorbing and using of crops are guaranteed, the organic polymer chelate is stable, the sugar alcohol chelate is absorbed fast, the organic polymer chelate can be released slowly, and by the cooperation of both, the purpose of synergistic interaction of rapid and medium effect release of medium trace elements can be achieved.

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)

Images