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Functional fertilizer applied to leaf surfaces as well as preparation method and application method thereof

A functional fertilizer and foliage technology, applied in fertilization methods, fertilization devices, applications, etc., can solve the problem of low magnesium content in the soil, achieve the effects of large contact area, simple application method, and improved utilization rate

Inactive Publication Date: 2021-10-01
SOUTH SUBTROPICAL CROPS RES INST CHINESE ACAD OF TROPICAL AGRI SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

South China is hot and rainy, rock weathering and leaching are strong, the magnesium-based primary minerals in the soil are completely decomposed, and the magnesium content in the soil is low. For example, the magnesium content of brick red soil is only 0.2%. Soil that collects iron and aluminium, but due to the form of iron and soil structure, it limits the absorption of iron by plants from the soil

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  • Functional fertilizer applied to leaf surfaces as well as preparation method and application method thereof
  • Functional fertilizer applied to leaf surfaces as well as preparation method and application method thereof

Examples

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preparation example Construction

[0019] The invention provides a method for preparing functional fertilizer for foliar application, which comprises mixing a mixed liquid dissolved with chitosan, magnesium salt and iron salt with an organic solvent, adding a crosslinking agent for crosslinking treatment, adding a surfactant , followed by adding an oxidizing agent for oxidation treatment to obtain a suspension of microsphere fertilizer, and dispersing the microsphere fertilizer in a protection solution in which magnesium salt and iron salt are dissolved.

[0020] Specifically, it includes the following steps:

[0021] (1) Prepare the mixed solution.

[0022] Dissolving chitosan with a deacetylation degree greater than 95% in water to obtain chitosan aqueous solution; the solid content of chitosan in the chitosan aqueous solution is 0.1%-5%.

[0023] The chitosan aqueous solution is divided into two parts, one part is added with magnesium salt to make a magnesium-containing solution; the acid corresponding to t...

Embodiment 1

[0045] This embodiment provides a functional fertilizer for foliar application, the preparation method of which comprises the following steps:

[0046] (1) Chitosan (deacetylation degree greater than 95%) is swelled in water to obtain an aqueous chitosan solution with a chitosan solid content of 2%.

[0047] (2) The chitosan aqueous solution is divided into two parts, one part is added with magnesium sulfate; the other part is added with ferrous sulfate until the saturated solution of the salt is obtained, and the pH value is adjusted to 4 with the acid corresponding to the anion added to the salt, and stirred overnight, Dissolve chitosan completely.

[0048] (3) Mix the two solutions obtained in (2) at a ratio of 1:1, pour into liquid paraffin, the ratio of the mixture to liquid paraffin is 1:9; and stir with mechanical stirring at a speed of 1200rpm.

[0049] (4) Add glutaraldehyde dropwise in (3), (the ratio of glutaraldehyde to chitosan is 1:200), and stir at room tempera...

Embodiment 2

[0058] This embodiment provides a functional fertilizer for foliar application, the preparation method of which comprises the following steps:

[0059] (1) Chitosan (deacetylation degree greater than 95%) is swelled in water to obtain a chitosan aqueous solution with a chitosan solid content of 0.2%.

[0060] (2) Divide the chitosan aqueous solution into two parts, add magnesium chloride to one part; add ferrous chloride to the other part until a saturated solution of salt is obtained, adjust the pH value to 3 with the acid corresponding to the anion of the added salt, and stir overnight , completely dissolve the chitosan.

[0061] (3) Mix the two solutions obtained in (2) at a ratio of 1:10, pour into benzene, the ratio of the mixture to benzene is 1:3; stir with a mechanical agitator at a speed of 3000rpm.

[0062] (4) Add vanillin dropwise in (3), the ratio of which to chitosan is 5:100, and stir at room temperature for 10 hours.

[0063] (5) Add dodecyltrimethylammonium ...

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Abstract

The invention discloses a functional fertilizer applied to leaf surfaces as well as a preparation method and an application method thereof, and relates to the technical field of foliage fertilizers. The preparation method comprises the following steps of: mixing a mixed solution in which chitosan, magnesium salt and ferric salt are dissolved with an organic solvent, adding a cross-linking agent for cross-linking treatment, adding a surfactant, then adding an oxidizing agent for oxidation treatment to obtain a suspension of a microsphere fertilizer, and dispersing the microsphere fertilizer in a protective solution in which magnesium salt and ferric salt are dissolved. According to the preparation method, chitosan used as a wall material can enrich metal ions, so that the salt concentration of the microspheres is far higher than that of an aqueous solution, the molecular weight of the chitosan is effectively reduced by fixing the morphology of the microspheres and stabilizing and oxidizing the microspheres, the microspheres are easier to expand after being sprayed to leaf surfaces, and magnesium fertilizer and iron fertilizer which are internally enriched can be continuously released to plants; and the contact area between the unfolded microspheres and the leaf surfaces is larger, the microspheres cannot be easily washed and stripped by rainwater, and the utilization efficiency of the functional fertilizer applied to leaf surfaces can be improved.

Description

technical field [0001] The invention relates to the technical field of foliar fertilizers, in particular to a foliar-applied functional fertilizer and a preparation method and an application method thereof. Background technique [0002] Magnesium is an important component of chlorophyll and is essential for photosynthesis. Magnesium is also an activator of various enzymes, which can promote the assimilation of carbon dioxide, and can stimulate the activities of fructokinase, glucokinase and phosphoglucomutase related to carbohydrate metabolism. Magnesium can activate amino acids to form polypeptide chains, which is beneficial to protein synthesis. In addition, magnesium can also promote the synthesis of vitamin A and vitamin C, which is beneficial to improve fruit quality. The lack of magnesium in plants will hinder the metabolism in the body, especially affecting the maturity of seeds and the development of young tissues. [0003] Iron is also closely related to photosyn...

Claims

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Application Information

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IPC IPC(8): C05G3/40C05G3/50C05G3/60C05G5/27C05G5/30C05G5/35A01C21/00
CPCC05G3/60C05G5/27C05G5/37C05G5/35C05G3/40C05G3/50C05D5/00A01C21/00C05D9/02
Inventor 刘亚男何东宁徐明岗石伟琦韩志萍张丽英
Owner SOUTH SUBTROPICAL CROPS RES INST CHINESE ACAD OF TROPICAL AGRI SCI