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Nitrogen-phosphorus-potassium slow-release compound fertilizer for landscape flowers

A slow-release compound fertilizer, nitrogen, phosphorus and potassium technology, applied in the direction of urea compound fertilizer, nitrogen fertilizer, phosphate fertilizer, etc., can solve the problems of weak sustainability, fast fertilizer effect, and poor slow-release effect.

Pending Publication Date: 2021-09-10
LANZHOU JIAOTONG 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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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A kind of NPK slow-release compound fertilizer for landscape flowers in this embodiment is made of the following raw materials in parts by weight: 14 parts of urea and 5-ethyl-2-furfural condensate, 36 parts of biogas residue, biochar 13 parts, 31 parts of mixed fertilizer, 12 parts of sea guano, appropriate amount of water; the mixed fertilizer is composed of ferrous sulfate, ammonium bicarbonate, superphosphate and potassium dihydrogen phosphate in a mass ratio of 1:5:6:10 . The guano is dry, with a water content of less than 1%, and a particle size of ≥1mm. The particle size of the biochar is ≥100 μm. The particle size of the biogas slag is greater than or equal to 150 μm.

[0017] The preparation method of the urea and 5-ethyl-2-furfural condensate is as follows: dissolve urea in water, adjust the pH value to 7.5 with mass fraction 2% sodium hydroxide and 1% nitric acid, and then add 5-ethyl-2-furfural For 2-furfural, heat at 65°C and keep it warm for 1 hour; rai...

Embodiment 2

[0019] A kind of NPK slow-release compound fertilizer for landscape flowers in this embodiment is made of the following raw materials in parts by weight: 10 parts of urea and 5-ethyl-2-furfural condensate, 32 parts of biogas residue, biochar 10 parts, 25 parts of mixed fertilizer, 12 parts of sea guano, appropriate amount of water; the mixed fertilizer is composed of ferrous sulfate, ammonium bicarbonate, superphosphate and potassium dihydrogen phosphate in a mass ratio of 1:5:6:10 . The guano is dry, with a water content of less than 1%, and a particle size of ≥1mm. The particle size of the biochar is ≥100 μm. The particle size of the biogas slag is greater than or equal to 150 μm.

[0020] The preparation method of the urea and 5-ethyl-2-furfural condensate is as follows: dissolve urea in water, adjust the pH value to 7.5 with mass fraction 2% sodium hydroxide and 1% nitric acid, and then add 5-ethyl-2-furfural For 2-furfural, heat at 65°C and keep it warm for 1 hour; rai...

Embodiment 3

[0022] A kind of NPK slow-release compound fertilizer for landscape flowers in this embodiment is made of the following raw materials in parts by weight: 19 parts of urea and 5-ethyl-2-furfural condensate, 38 parts of biogas residue, biochar 14 parts, 38 parts of mixed fertilizer, 14 parts of sea guano, appropriate amount of water; the mixed fertilizer is composed of ferrous sulfate, ammonium bicarbonate, superphosphate and potassium dihydrogen phosphate in a mass ratio of 1:5:6:10 . The guano is dry, with a water content of less than 1%, and a particle size of ≥1 mm. The particle size of the biochar is ≥100 μm. The particle size of the biogas slag is greater than or equal to 150 μm.

[0023] The preparation method of the urea and 5-ethyl-2-furfural condensate is as follows: dissolve urea in water, adjust the pH value to 8 with mass fraction 2% sodium hydroxide and 1% nitric acid, and then add 5-ethyl-2-furfural For 2-furfural, heat at 65°C and keep it warm for 1 hour; rais...

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Abstract

A nitrogen-phosphorus-potassium slow-release compound fertilizer for landscape flowers is mainly composed of urea, 5-ethyl-2-furfural condensate, biogas residues, biochar, a mixed fertilizer, guano and water. The slow-release compound fertilizer disclosed by the invention has the effects of effectively improving soil and improving fertility, and has relatively good adsorption performance, relatively large porosity and specific surface area, and relatively strong adsorption capacity, oxidation resistance and biological decomposition resistance; and the slow-release compound fertilizer has the functions of improving soil, slowly releasing fertilizer, fixing carbon and reducing emission, and has the greatest advantage that slow release of nitrogen, phosphorus and potassium can be well realized, growth of landscape flowers is greatly promoted, and the period of validity is 40 days or above.

Description

technical field [0001] The invention belongs to the technical field of fertilizer slow-release agent production, and in particular relates to a nitrogen, phosphorus and potassium slow-release compound fertilizer for landscape flowers. Background technique [0002] At present, industrial chemical fertilizers are mainly chemical fertilizers 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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/40C05G3/80
CPCC05B1/02C05G3/40C05G3/80C05B7/00C05C3/00C05C9/00C05D9/00C05D9/02C05F3/02C05F9/04
Inventor 周键孙三祥
Owner LANZHOU JIAOTONG UNIV
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