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Total-nutrient water-retaining degradable mechanically-applied coated fertilizer

A full-nutrient fertilizer and water-retaining technology, applied in fertilization methods, organic fertilizers, inorganic fertilizers, etc., can solve the problems of poor compression resistance of the fertilizer core, affecting the soil environment, easy powder removal, etc., achieve high toughness and plasticity, and improve soil Structure, the effect of improving adhesion

Inactive Publication Date: 2015-04-08
SHENZHEN BATIAN ECOTYPIC ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These fertilizers have the following problems in the process of manufacture and use: sulfur-coated urea is too single in nutrients to provide comprehensive nutrition; urea-formaldehyde resin-coated fertilizers will release free formaldehyde, which will be harmful during transportation and storage. Human health; although resin-coated fertilizers have the advantages of good water resistance, good wear resistance, long release time, and good controlled release effects, the price is too high, and many benzene-containing and high-polymerization resin materials cannot be used in soil. In addition, many resin materials need to use volatile and toxic halogenated organic compounds as solvents during the coating process, which increases the equipment cost for solvent recovery, and will cause human harm if the recovery is not complete; in addition , due to the poor compressive resistance of the granulated fertilizer core, or the weak and uneven coating, it is easy to lose powder, absorb moisture and harden during the process of transportation and storage, and block the fertilizer outlet of the fertilizer seeding machine; Fertilizers with poor release properties release too much nutrients in the soil in the early stage, which may cause damage to seedlings
The starch and tung oil used in this invention are too easily degraded by soil microorganisms, directly affecting the long-term effect of nutrients

Method used

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  • Total-nutrient water-retaining degradable mechanically-applied coated fertilizer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] (1) Preparation of full nutrient fertilizer core:

[0038] The amount of raw materials is recorded by the quality of one thousand finished products.

[0039]

[0040] Among them, the particle size of the montmorillonite is 400 mesh, and the above-mentioned raw materials are fully mixed to obtain a full-nutrient fertilizer core through a high-tower granulation process.

[0041] (2) Preparation of water-retaining degradable coating solution:

[0042] Based on the mass of 100 parts of the coating solution, 40g of sulfur was completely melted in a high-speed shear mixer at 120°C, and 40g of melamine formaldehyde resin and 10g of polyvinyl acetate were added in sequence, and the heating was continued at 120°C. Stirring speed of rev / min, stirring for 5 minutes, then adding 5g of diatomaceous earth and 5g of polyacrylic acid, stirring for 5 minutes at a stirring speed of 200 rev / min, to form a stable coating solution;

[0043] (3) Preheating and coating:

[0044] Put 50k...

Embodiment 2

[0050] With example 1, difference is: replace 50 parts of potassium fulvate in embodiment 1 with each 25 parts of alginic acid and potassium fulvate, replace the montmorillonite in embodiment 1 with each 25 parts of diatomite 50 parts of destoned, wherein the particle size of montmorillonite is 200 mesh, the cold water insoluble nitrogen content of melamine formaldehyde resin is 40%, and the free aldehyde is less than 0.5%.

[0051] The fully nutrient and water-retaining degradable machine-applied coated fertilizer (marked as 16-12-15) prepared in Example 2 was tested according to the industry standard for controlled-release fertilizers (HG / T3931-2007), and the nutrient release period was found to be 70 days .

[0052] Contrast the sample fertilizer (16-12-15) prepared in Example 2 with the common sulfur machine-applied coating fertilizer with NPKS nutrients, corn is planted in the plot, and each plot area is 100m 2 , apply 8kg to each plot, adopt the method of mechanical app...

Embodiment 3

[0056] With example 1, difference is: replace 50 parts of potassium fulvate in embodiment 1 with each 25 parts of humic acid and potassium fulvate, replace the montmorillonite in embodiment 1 with each 25 parts of kaolin and diatomaceous earth Stone 50 parts.

[0057] The full nutrient and water-retaining degradable machine-applied coated fertilizer prepared in Example 3 was tested according to the industry standard for controlled-release fertilizers (HG / T3931-2007), and the nutrient release period was found to be 57 days.

[0058] Contrast the sample fertilizer (16-12-15) prepared in Example 3 with the common sulfur machine-applied coating fertilizer with NPKS nutrient, and the corn is planted in the plot, and each plot area is 100m 2 , apply 8kg to each plot, adopt the method of mechanical application, and pour the same amount of water each time, collect 20cm soil samples for analysis, and the results of the agrochemical test are as follows:

[0059]

[0060] On the whol...

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Abstract

The invention discloses a total-nutrient water-retaining degradable mechanically-applied coated fertilizer and a preparation method thereof, and belongs to the technical field of fertilizers. The preparation method comprises the following steps: (1) preparing a total-nutrient fertilizer core; (2) preparing a water-retaining degradable coating liquid, namely melting sulfur in a high-speed shearing mixer, heating after amino resin and a membrane modifying agent are added, mixing and adding a water retaining agent till the stable water-retaining degradable coating liquid is formed; (3) preheating the total-nutrient fertilizer core; and (4) coating, namely coating the prepared water-retaining degradable coating liquid on the surface of the preheated total-nutrient fertilizer core. The mechanically-applied coated fertilizer prepared according to the preparation method has global nutrition, is low in price and degradable, can be mechanically applied, has the functions of retaining water, improving soil and the like, and can be applied to field crops in northwest arid areas of China.

Description

technical field [0001] The invention relates to the technical field of fertilizers, in particular to a fully nutrient and water-retaining degradable machine-applied coated fertilizer and a preparation method and application thereof. Background technique [0002] At present, slow and controlled release fertilizers are the direction of agricultural development, and their advantages are especially reflected in reducing the frequency of fertilization. With the development of land intensification in my country, the requirements for planting management costs are becoming more and more stringent, and the existing agricultural technologies are also With the development in this direction, such as mechanization of farming, farmers who grow field crops have an increasing demand for slow-release fertilizers that can be sown with seeds. [0003] Coated fertilizer can wrap fertilizer nutrients in a waterproof and inert membrane material, so as to delay and control the release of fertilizer...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00A01C21/00
CPCC05B7/00C05G3/00C05G3/80C05G5/30C05C9/00C05D1/02C05D9/00C05D9/02C05F11/02C05G1/00
Inventor 徐步洲陈文哲朱伟根
Owner SHENZHEN BATIAN ECOTYPIC ENG
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