Tea tree slow-release fertilizer and preparation technology thereof

[0026] The wrapping of embodiment 1 inorganic fertilizer

[0027] Take 35 kilograms of urea, 50 kilograms of diammonium phosphate, 10 kilograms of potassium chloride, 1 kilogram of zinc sulfate heptahydrate, and 1 kilogram of magnesium sulfate heptahydrate; Made into particles with a diameter of about 0.5mm, that is, unwrapped fertilizer.

[0028] Take 0.5 kg of BergaFat (BergaFat) HTL316 (available from Huixingao Animal Husbandry Co., Ltd., Nanning, Guangxi) and melt it in an oven at 60 ° C, and then use a fluidized granulation coating machine to spray it all evenly onto 9.5 kg of the above-prepared granules Inorganic fertilizer 1 is obtained by forming an encapsulation layer on the surface of the substrate; another 2 kg of BergaFat HTL316 (available from Huixingao Animal Husbandry Co., Ltd., Nanning, Guangxi) is melted in an oven at 60°C, and then used in a fluidized granulation bag The clothes machine uniformly sprays all of them on the surface of 8 kg of the above-mentioned

[0029] Embodiment 2 The wrapping of the fertilizer containing fulvic acid

[0030] Take 28 kg of ammonium chloride, 40 kg of diammonium phosphate, 8 kg of potassium chloride, 1 kg of zinc sulfate heptahydrate, and 1 kg of magnesium sulfate heptahydrate, mix well, then add 20 kg of fulvic acid and 2 kg of water, mix After uniformity, crush and sieve to make granules with a diameter of about 0.5mm.

[0031] Take 0.5 kg of BergaFat (BergaFat) HTL316 (available from Huixingao Animal Husbandry Co., Ltd., Nanning, Guangxi) and melt it in an oven at 60 ° C, and then use a fluidized granulation coating machine to spray it all evenly onto 9.5 kg of the above-prepared granules A coating layer is formed on the surface of the fertilizer, that is, a fertilizer containing fulvic acid is obtained.

[0032] The dissolution rate test of embodiment 3 package fertilizer

[0033] Get the inorganic fertilizer 1, inorganic fertilizer 2 and the fertilizer containing fulvic acid prepared in Examples 1 and 2, and take the non-wrapped fertilizer prepared in Example 1 and the fertilizer wrapped with polyurethane resin as a contrast, immerse in clear water, in different Timely water samples were taken to detect the dissolution rate of fertilizers, and the results are shown in the table below:

[0034]

[0035] The unwrapped fertilizer dissolved almost immediately, indicating that it could not have a slow-release effect; the fertilizer wrapped with polyurethane was dissolved at the beginning except for the fertilizer particles that were not wrapped and sealed (encapsulated), and then rarely released fertilizer, and the dissolution efficiency was too low; The encapsulation efficiency of fertilizer 1 is very low, causing a large amount of fertilizer to dissolve at the beginning, but the