Multi-functional slow-release urea fertilizer and preparation method
A slow-release urea and multi-functional technology, applied in the field of nitrogen fertilizers, can solve the problems of single nutrient and function, and achieve the effects of improving absorption and utilization, resisting lodging, promoting precocious maturity, and promoting absorption and utilization.
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Embodiment 1
[0035] The ingredients of the multifunctional slow-release urea fertilizer include urea, biochemical inhibitors, synergists, and water-soluble salt ions of medium and trace elements necessary for plants.
[0036] Based on 100 parts of urea slurry, 0.25 parts of N-butyl thiophosphoric triamide, 0.25 parts of dicyandiamide, 0.05 parts of PASP, 0.5 parts of magnesium, 0.5 parts of zinc and N-butyl thiophosphoric triamide Amine, dicyandiamide, PASP, magnesium nitrate and zinc sulfate are fully dissolved or suspended in a formaldehyde solution with a concentration of 37%, and the multifunctional slow-release urea fertilizer with a nitrogen content of 45% can be obtained through high-tower granulation.
[0037] Wherein the magnesium ions are selected from magnesium nitrate, the zinc ions are selected from zinc sulfate, and the molecular weight of PASP is: 40000, and the structure formula is polyaspartic acid such as formula 1.
[0038] Preparation method: based on 100 parts of urea ...
Embodiment 2
[0040] The ingredients of the multifunctional slow-release urea fertilizer include urea, biochemical inhibitors, synergists, and water-soluble salt ions of medium and trace elements necessary for plants.
[0041] Based on 100 parts of urea slurry, 0.1 part of thiophosphoric triamide, 0.05 part of 3,4-dimethylpyrazole phosphate, and thiophosphoric triamide, 3,4-dimethylpyrazole phosphate Dissolved 37% formaldehyde solution, 1 part of PASP sodium salt, 0.1 part of zinc, 0.1 part of copper, 0.1 part of manganese, 0.1 part of boron, 0.1 part of molybdenum and can dissolve PASP sodium salt, zinc, copper, manganese, boron and molybdenum The water is passed through a high tower to granulate the multifunctional slow-release urea containing PASP, sulfur, zinc, copper, manganese, boron and molybdenum with a nitrogen content of 45.5%.
[0042] Wherein copper ion is selected from copper sulfate, zinc ion is selected from zinc sulfate, manganese ion is selected from manganese sulfate, bora...
Embodiment 3
[0045] The ingredients of the multifunctional slow-release urea fertilizer include urea, biochemical inhibitors, synergists, and water-soluble salt ions of medium and trace elements necessary for plants.
[0046] Based on 100 parts of urea slurry, 5 parts of N-butylthiophosphoric triamide, 5 parts of 3,5-dimethylpyrazole, and N-butylthiophosphoric triamide and 3,5 - Dimethylpyrazole dissolved in 37% formaldehyde solution, 1 part PASP, 0.5 part calcium, 0.5 part magnesium, 0.1 part zinc, 0.1 part copper, 0.1 part manganese, 0.1 part boron, 0.1 part molybdenum and PASP, calcium, magnesium, zinc, copper, manganese, boron and molybdenum dissolved in water, through high-tower granulation to obtain 41.2% nitrogen content containing PASP, calcium, magnesium, sulfur, zinc, copper, manganese, boron, Molybdenum's multifunctional slow-release urea.
[0047] Wherein calcium ions are selected from calcium chloride, magnesium ions are selected from magnesium sulfate, zinc ions are selected...
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