Slow controlled-release fertilizer used for corn

A slow and controlled release fertilizer and corn technology, applied in the fields of application, nitrogen fertilizer, potassium fertilizer, etc., can solve the problems of incomplete matching of nutrient absorption in the duration of fertilizer effect, lack of biomass in urea-formaldehyde fertilizer, and poor slow-release effect, etc., to improve nitrogen Sustained-release performance of the element, improvement of soil, and the effect of reducing the dissolution rate

Pending Publication Date: 2019-11-08
HEBEI AGRICULTURAL UNIV.
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compound fertilizers have the advantages of complete types of nutrients and high content. They are quick-acting fertilizers, and the duration of fertilizer effects cannot completely match the absorption of nutrients by crops.
[0004] However, there is no corresponding slow-release fertilizer for organic-inorganic compound fertilizers or the slow-release effect is poor, while urea-formaldehyde fertilizers lack natural biomass. Compound fertilizers have fast effects and weak sustainability, so each has its own advantages and disadvantages.

Method used

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  • Slow controlled-release fertilizer used for corn
  • Slow controlled-release fertilizer used for corn
  • Slow controlled-release fertilizer used for corn

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The slow and controlled release fertilizer for corn of the present embodiment is made of the following raw materials in parts by weight: 13 parts of urea furfural condensate, 35 parts of furfural slag, 14 parts of rice husk charcoal, 27 parts of compound fertilizer, 13 parts of vermiculite powder; The compound fertilizer is composed of urea, diammonium phosphate and potassium sulfate with a mass ratio of 8:8:20; the particle diameter of the vermiculite powder ≥ 74 μm; the particle diameter of the rice husk charcoal ≥ 165 μm; the furfural slag Particle size ≥ 165μm;

[0023] The preparation method of the urea furfural condensate is as follows: dissolve urea in water, adjust the pH value to 8.3 with 5% KOH solution and 3% boric acid by mass fraction, then add furfural, stir while adding, and finish adding After furfural, keep the temperature at 53°C for 1h, then raise the temperature to 70°C, stir and adjust the pH value to 5.3 with acetic acid and ammonium acetate buffer...

Embodiment 2

[0025] The slow-release fertilizer for corn of the present embodiment is made of the following raw materials in parts by weight: 8 parts of urea furfural condensate, 33 parts of furfural residue, 15 parts of rice husk charcoal, 30 parts of compound fertilizer, 14 parts of vermiculite powder; The particle size of the vermiculite powder is ≥74 μm; the particle size of the rice husk charcoal is ≥165 μm; the particle size of the furfural slag is ≥165 μm;

[0026] The preparation method of the urea furfural condensate is as follows: dissolving urea in water, adjusting the pH value to 8 with a mass fraction of 5% KOH solution and a mass fraction of 3% boric acid, then adding furfural, stirring while adding, and finishing the addition After furfural, keep the temperature at 50°C for 1h, then raise the temperature to 70°C, stir and adjust the pH value to 5 with acetic acid and ammonium acetate buffer system, and keep it at 70°C for 0.5h, then heat it at 75°C Grinding after drying unde...

Embodiment 3

[0028] The slow-release fertilizer for corn of the present embodiment is made of the following raw materials in parts by weight: 18 parts of urea furfural condensate, 37 parts of furfural residue, 13 parts of rice husk charcoal, 25 parts of compound fertilizer, 12 parts of vermiculite powder; The compound fertilizer is composed of urea, diammonium phosphate and potassium sulfate with a mass ratio of 8:8:20; the particle diameter of the vermiculite powder ≥ 74 μm; the particle diameter of the rice husk charcoal ≥ 165 μm; the furfural slag Particle size ≥ 165μm;

[0029] The preparation method of the urea furfural condensate is as follows: dissolve urea in water, adjust the pH value to 8.5 with 5% KOH solution and 3% boric acid by mass fraction, then add furfural, stir while adding, and finish adding After furfural, keep the temperature at 55°C for 1h, then raise the temperature to 70°C, stir and adjust the pH value to 5.5 with acetic acid and ammonium acetate buffer system, and...

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Abstract

The invention provides slow controlled-release fertilizer used for corn. The fertilizer is prepared from a urea furfural condensation product, furfural residues, rice husk charcoal, compound fertilizer and vermiculite powder. According to the characteristics of large biomass of corn and high demand of nitrogen and potassium, the compound fertilizer is quick in fertilizer efficiency, and is combined with the vermiculite powder and the rice husk charcoal, the nitrogen and potassium content is increased, the dissolution rate of nitrogen and potassium is reduced, the slow action effect of the compound fertilizer is improved, the demand for nitrogen and potassium in a corn large bell mouth stage and later growth and development is provided, and the vermiculite powder can also improve the fertility; the furfural residues and the urea furfural condensation product are combined, the biomass content and the nitrogen release capacity of the urea furfural condensation product are improved, at thesame time, the content of organic matter in the furfural residues and the rice husk charcoal is high, soil physical properties are improved, and nitrogen, phosphorus and potassium elements can be released to promote corn growth; and the rice husk charcoal is combined with the vermiculite powder to improve soil fertility and improve soil, and the slow controlled-release fertilizer used for the corn can better achieve slow releasing of nitrogen and potassium, and the effective period is more than 70 days.

Description

technical field [0001] The invention belongs to the technical field of fertilizers, in particular to a slow-controlled release fertilizer for corn. Background technique [0002] At present, the main fertilizers used in agriculture are chemical fertilizers mainly containing nitrogen, phosphorus, and potassium. After use, they can supplement the corresponding elements and have a certain effect on increasing crop production. However, the utilization rate of fertilizers has been at a very low level. A large amount of nitrogen, phosphorus, and potassium elements cannot be effectively used by crops due to improper release timing and remain in the soil. The waste of nutrients is serious and causes environmental pollution. After long-term use of chemical fertilizers on the land, the soil is severely compacted, organic microorganisms are reduced, and even polluted, resulting in a decline in soil quality and crop yields. [0003] The application of slow and controlled release fertili...

Claims

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Application Information

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IPC IPC(8): C05G3/00C05G3/04
CPCC05B7/00C05G3/00C05C9/00C05D1/02C05D9/00C05F5/006
Inventor 文宏达李淑文刘德祥李春燕张宇航刘子山
Owner HEBEI AGRICULTURAL UNIV.
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