Special slow-release fertilizer for rice and preparation method thereof

• Main Authors: ZHANG ZHENYU, JIANG TAO, HE WEIHAO, YI BAIKE, XIANG TIEJUN, LIU AIHUA
• Format: Patent
• Language: Chinese; English
• Published: 24.12.2019
• 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 special slow-release fertilizer for rice, which comprises the following components in parts by weight: 90-110 parts of coated urea, 90-110 parts of large-particle urea, 780-820 parts of compound fertilizer and 20-30 parts of soil conditioner. The invention also discloses a preparation method of the special slow-release fertilizer for rice. The preparation method comprisesthe following steps: preparing a dispersion liquid of a coating material; spraying the dispersion liquid on the surface of the granular urea, and drying the granular urea to prepare coated urea; finally, mixing the coated urea, the granular urea, the compound fertilizer and the soil conditioner to obtain the special slow-release fertilizer for rice. The slow-release fertilizer disclosed by the invention is customized according to the fertilizer requirement law of crops; the fertilizer can meet the requirement of rice for nutrition in the whole growth period, only 35-40 kg/mu of fertilizer needs to be applied at a tim