Degradable fertilizer coating liquid and manufacturing method thereof
A technology of fertilizer coating and weight ratio, which is applied in the direction of fertilizer form, fertilizer mixture, fertilization device, etc., can solve the problems of increasing the cost of membrane materials, slow degradation of coating materials, and complicated production processes, so as to improve the utilization rate of fertilizers and make The effect of simple process and wide source of raw materials
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Embodiment 1
[0023] Put 5g of chitosan into a beaker according to the weight ratio of the coating solution, add 2g of glacial acetic acid and 10g of distilled water, heat, and stir at 45°C for 40 minutes to make a chitosan glacial acetic acid solution; Add 5g of polyvinyl alcohol (PVA) with a degree of polymerization of 1700-1800, 3g of oxidized starch, and 64.35g of distilled water into the three-necked flask with a thermometer and a thermometer, and heat to 88°C under stirring to dissolve completely, leave it at room temperature, and add chitosan Sugar glacial acetic acid solution, bentonite 2g, formaldehyde 1g, gelatin 0.5g, N-butyl thiophosphoric triamide (NBPT) 0.05g, thiourea 0.1g, heated to 85°C, stirred at high speed for 2h, and the coating material was formed liquid. The coating material is then applied to the granular fertilizer using a drum process.
Embodiment 2
[0025] Put 8g of chitosan into a beaker according to the weight ratio of the coating solution, add 3g of glacial acetic acid and 15g of distilled water, heat, and stir at 45°C for 40 minutes to make a chitosan glacial acetic acid solution; Add 15g of polyvinyl alcohol (PVA) with a degree of polymerization of 1700-1800, 6g of oxidized starch, and 49.8g of distilled water into the three-necked flask with a degree of polymerization of 1700-1800, and heat to 90°C under stirring, dissolve completely, place at room temperature, and add chitosan Sugar glacial acetic acid solution, diatomaceous earth 3.5g, formaldehyde 3g, gelatin 1.5g, N-butyl thiophosphoric triamide (NBPT) 0.2g, thiourea 0.3g, heat to 90°C, stir at high speed for 1h, and serve Coating material liquid. The coating solution is then applied to the granular fertilizer.
Embodiment 3
[0027] Put 10g of chitosan into a beaker according to the weight percentage of the coating solution, add 4g of glacial acetic acid and 20g of distilled water, heat, and stir at 50°C for 30 minutes to make a chitosan glacial acetic acid solution; Add 20g of polyvinyl alcohol (PVA) with a degree of polymerization of 1700-1800, 10g of cornstarch, and 31.5g of distilled water into the three-necked flask with a thermometer and a thermometer, and heat to 94°C under stirring to dissolve completely, leave it at room temperature, and add chitosan Sugar glacial acetic acid solution, clay 5g, formaldehyde 4g, gelatin 1.5g, N-butyl thiophosphoric triamide (NBPT) 0.5g, thiourea 0.5g, heat to 90°C, stir at high speed for 1.5h to form a coating material liquid. The coating solution is then applied to the granular fertilizer.
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