The invention discloses high-water-retention slow-release seaweed
fertilizer and a preparation method thereof. The high-water-retention slow-release seaweed
fertilizer comprises the following raw materials in parts by weight: seaweed, diatomite,
carboxymethyl cellulose sodium,
bentonite,
chitosan, bean pulp, a dispersing agent, lauryl
sodium sulfate,
calcium superphosphate, methylcellulose and
distilled water. The preparation method comprises the following steps: S1, performing washing,
air drying and crushing on the seaweed, so as to obtain seaweed particles; S2, performing mixing and enzymolysis on the seaweed particles and other mixtures, so as to obtain a
mixed solution; S3, centrifuging the
mixed solution, collecting supernate, and performing
fermentation; S4, preparing a membranous solution; S5, applying the membranous solution, so as to obtain a flexible glue piece; S5, laying a
fermentation product into the flexible glue piece, so as to obtain the high-water-retention slow-release seaweed
fertilizer. The fertilizer has the advantages that seaweed fertilizer is packaged in a membranous material, the membranous material, along with washing of rainwater or
irrigation water, gradually releases the seaweed fertilizer into soil, and slow release is formed, so that a sower can reduce the applying frequency of the seaweed fertilizer during
sowing.