Self-curing film-coated controlled release fertilizer and preparation method thereof
A technology of self-curing coated and controlled-release fertilizers, applied in fertilizer forms, fertilizer mixtures, fertilization devices, etc., can solve the problems of waste of resources, short supply of sulfur-coated urea, and high production costs, so as to increase production, improve quality, reduce The effect of energy consumption
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Embodiment 1
[0029] Raw materials granular urea, alginate, slaked lime powder. According to the ratio of granulated urea in parts by weight: seaweed glue: slaked lime powder = 70:5:25, after preparing the materials in sequence, prepare the seaweed glue into a liquid with a concentration of 10%, first add urea into the disc granulator, and then Spray seaweed glue in the case, and spray slaked lime dry powder, and rotate until it is evenly coated. After the particles are dried and carbonized, they are sieved to obtain the finished product.
[0030]The slow-release time of the self-curing coated slow-controlled release fertilizer prepared in Example 1 is 3 months. Applying the self-cured coated slow-controlled release fertilizer prepared in Example 1 to wheat can increase the yield of wheat by 15%. The test site was selected in Weihai, Shandong Province. The nitrogen content of the self-curing coated slow-release urea prepared according to Example 1 was lower than that of ordinary urea. The...
Embodiment 2
[0032] Raw materials Granular urea, polyvinyl acetate emulsion, slaked lime powder. According to the ratio of granulated urea in parts by weight: polyvinyl acetate emulsion: slaked lime powder = 70:3:25, polyvinyl acetate emulsion is commercially available, after preparing materials in sequence, first add urea in the disc granulator, and in the case of rotation Spray polyvinyl acetate emulsion down, rotate evenly, then spray dry lime powder, rotate until evenly coated. After the particles are dried and carbonized, they are sieved to obtain the finished product.
[0033] The slow-release time of the self-curing coated slow-controlled release fertilizer obtained in Example 2 is 3 months, and the self-cured coated slow-controlled release fertilizer obtained in Example 2 is applied to rice, under the same nitrogen content It can increase rice yield by 14%. Experiments in Mudanjiang Bureau of Land Reclamation Bureau of Heilongjiang and in Liaoning, Anhui, Yunnan and other places ...
Embodiment 3
[0035] Raw materials Compound fertilizer granules (mixed with urea, diammonium phosphate, and potassium sulfate, nitrogen, phosphorus, and potassium ratio 30:8:12), seaweed gel, hydroxypropyl methylcellulose solution, and slaked lime powder. According to the ratio of compound fertilizer granules in parts by weight: seaweed glue: hydroxypropyl methylcellulose: slaked lime powder = 65:3:1:23, after preparing materials in sequence, prepare 3 parts of seaweed glue into a liquid with a concentration of 10% and hydroxyl Mix 1 part of propyl methylcellulose into 1% liquid and mix evenly. First, add urea into the disc granulator, spray the above-mentioned glue solution under the condition of rotation, and spray dry lime powder after the surface is evenly distributed, and rotate until evenly coated. After the particles are dried and carbonized, they are sieved to obtain the finished product.
[0036] The slow-release time of the self-curing coated slow-controlled release fertilizer pr...
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