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Coated slow-release fertilizer based on trace elements chelated by humic acid materials and its preparation method and application

A medium and trace element, coated slow-release technology, applied in the direction of layered/coated fertilizer, organic fertilizer, urea compound fertilizer, etc. The effect of enhancing waterlogging resistance

Active Publication Date: 2021-09-03
SHIHEZI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to improve the deficiencies in the prior art, the purpose of this paper is to provide a kind of coated slow-release fertilizer based on the complexing material chelating trace elements and its preparation method and use, through the complexing material chelating trace elements and natural bonding The film material made by the combined use of gliadin and optionally polyvinyl alcohol or polyvinylpyrrolidone can effectively solve the shortcomings of existing film materials such as brittleness, cracking, and difficult degradation, so as to achieve excellent sustained-release performance, and the complexation The material is also used as an organic fertilizer, which has considerable benefits in regulating the physical and chemical properties of the soil and the absorption of nutrients by crops, and is environmentally friendly; in addition, it can be prepared according to the soil conditions or the trace elements required for pre-planting crops. Coated slow-release fertilizers that combine different types of medium and trace elements to better adapt to local conditions

Method used

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  • Coated slow-release fertilizer based on trace elements chelated by humic acid materials and its preparation method and application
  • Coated slow-release fertilizer based on trace elements chelated by humic acid materials and its preparation method and application
  • Coated slow-release fertilizer based on trace elements chelated by humic acid materials and its preparation method and application

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preparation example Construction

[0070] The preparation method of the present invention will be further described in detail in conjunction with specific examples below. It should be understood that the following examples are only for illustrating and explaining the present invention, and should not be construed as limiting the protection scope of the present invention. All technologies realized based on the above contents of the present invention are covered within the scope of protection intended by the present invention.

[0071] The experimental methods used in the following examples are conventional methods unless otherwise specified; the reagents and materials used in the following examples can be obtained from commercial sources unless otherwise specified.

Embodiment 1

[0073] The present embodiment provides a kind of coated slow-release fertilizer based on potassium fulvic acid chelated iron element, which is obtained by the following preparation method:

[0074] In the first step, take 500g of granular urea (with a particle size of 1.18mm-3.35mm) and preheat it to 44°C to 48°C, and dissolve potassium fulvate in water to prepare a potassium fulvate solution with a concentration of 15mg / mL. According to the molar ratio of spraying materials 1:1 (the molar ratio of potassium fulvic acid to iron element), ferric chloride hexahydrate solution was prepared, and the binder zein was dissolved in high-concentration urea solution (0.04g / mL) to prepare Prepare a solution with a concentration of 0.04g / mL; take polyvinylpyrrolidone to make an aqueous solution with a concentration of 0.01g / mL, and take sodium hydroxide to prepare a weak alkaline aqueous solution with a pH ≈ 8.

[0075] In the second step, use the image 3In the device shown, the configu...

Embodiment 2

[0079] The present embodiment provides a kind of coated slow-release fertilizer based on potassium fulvic acid chelated iron element, which is obtained by the following preparation method:

[0080] In the first step, take 500g of compound fertilizer or compound fertilizer granules (particle size 2mm-3mm) and preheat it to 44°C to 48°C, and dissolve potassium fulvate in water to prepare potassium fulvate with a concentration of 15mg / mL Solution, prepare ferric chloride hexahydrate solution according to the molar ratio of the spraying material 1:1 (the molar ratio of potassium fulvic acid to iron element), take the binder zein and dissolve it in a high-concentration urea solution (0.04g / mL ) to a prolamin solution with a concentration of 0.04g / mL; polyvinylpyrrolidone to make an aqueous solution with a concentration of 0.01g / mL; sodium hydroxide to prepare a weak alkaline aqueous solution with pH ≈ 8.

[0081] In the second step, spray the configured potassium fulvic acid soluti...

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Abstract

The invention provides a coated slow-release fertilizer based on the chelation of trace elements in humic acid materials and its preparation method and application; the complexing material can chelate trace elements in the soil and provide more nutrients for the soil , so that it can be better used by plants; prevent and control plant diseases and enhance waterlogging resistance; stimulate microscopic biological activity of plants; slow-release fertilizers to improve the utilization rate of chemical fertilizers. As a coating material, the complex material can not only slow the release of urea to improve the utilization rate and prevent the nitrification of ammonium nitrogen, but also can be used as a soil improver to improve soil properties. The slow-release fertilizer is prepared by using the trace elements and prolamin in the chelated complex material as the coating material, which greatly improves the stability of the prepared membrane material. The prepared fertilizer is solid particles, which is convenient for transportation and can be applied to In open spaces such as Daejeon. In practical application, it is found that it can also improve the absorption of nutrients by plants.

Description

technical field [0001] The invention relates to the technical field of slow-release fertilizers, in particular to a coated slow-release fertilizer based on trace elements chelated by complex materials, a preparation method and application thereof. Background technique [0002] As an important means of agricultural production, chemical fertilizers play a pivotal role in promoting food production and agricultural production, and are called "food" for plants. Chemical fertilizers are an important measure to ensure food production safety, increase production, and increase income. Agricultural production cannot do without the use of chemical fertilizers. However, there are problems such as serious nutrient loss and low fertilizer utilization rate in the application of common chemical fertilizers. According to relevant literature and data, the utilization rate of chemical fertilizers in my country is very low: the utilization rate of nitrogen fertilizer is about 30% to 35%, the u...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C05G3/40C05G3/80C05G5/12C05G5/30
CPCC05C9/00C05G3/80C05G5/30C05C11/00C05D9/02C05F11/02C05G3/00
Inventor 贾鑫王钰郭鹤龄王小霖王荣杰
Owner SHIHEZI UNIVERSITY
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