Humic acid fertilizer for preventing soil hardening and preparation method thereof

• Main Authors: LUO DONGGUI, WANG XIAOCHUN
• Format: Patent
• Language: Chinese; English
• Published: 11.02.2022
• Subjects: CHEMISTRY; FERTILISERS; FERTILISERS CHARACTERISED BY THEIR FORM; MANUFACTURE THEREOF; METALLURGY; MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENTSUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVINGA SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES,SOIL-CONDITIONERS, WETTING AGENTS

The invention discloses a humic acid fertilizer for preventing soil hardening and a preparation method thereof, and relates to the field of fertilizers. The fertilizer comprises master batch and a coating film coating the master batch. The master batch comprises the following components in parts by mass: 50-70 parts of urea, 30-40 parts of potassium nitrate, 10-30 parts of monoammonium phosphate, 10-30 parts of potassium sulfate, 0-5 parts of trace elements, 1-5 parts of polyaspartic acid, 0-5 parts of magnesium oxide, 0-5 parts of calcium carbonate and 5-15 parts of humic acid. The coating film is prepared from the following components in parts by mass: 20 to 30 parts of humic acid, 3 to 8 parts of starch, 5 to 10 parts of talcum powder, 5 to 10 parts of chitosan and 1 to 3 parts of polyacrylamide. The fertilizer can improve the utilization rate of the fertilizer, improves the soil structure, has a slow release effect, and improves the utilization rate of the fertilizer. Humic acid ion exchange can help soil