Multifunctional sustained-release fertilizer

[0017] 1) Put 350 parts by weight of urea and 300 parts of potassium sulfate that have been sieved through 100 meshes into a mixer and stir thoroughly. After mixing, use a fertilizer granulator to granulate, and the granulated urea and potassium sulfate mixture coated with 8 parts of polyurethane resin;

[0018] 2) After 100 mesh sieving, the parts by weight are 200 parts of diammonium hydrogen phosphate, 10 parts of magnesium sulfate, 15 parts of zinc sulfate, 5 parts of sodium octaborate, 1 part of ammonium molybdate, 0.3 parts of Sodium α-naphthalene acetate, 10 parts of alginic acid, 10 parts of vitamin C, 10 parts of polyacrylamide, 90 parts of humic acid, and 5 parts of plant anti-stubble agent powder are put into the mixer, fully stirred, and then used as fertilizer Granulating machine for granulation;

[0019] 3) Fully mix the polyurethane resin-coated particles in step 1) with the particles in step 2) to form a multifunctional slow-release fertilizer.

[0020] The o...

[0021] Embodiment 2: Step 3), the packaging is the same as Example 1, the difference is:

[0022] 1) Put 400 parts by weight of urea and 350 parts of potassium sulfate that have been sieved through 100 meshes into the mixer and stir thoroughly. After mixing, use a fertilizer granulator to granulate, and the granulated urea and potassium sulfate mixture with 10 parts of polyurethane resin coating;

[0023] 2) After 100 mesh sieving, the parts by weight are 250 parts of diammonium hydrogen phosphate, 15 parts of magnesium sulfate, 20 parts of zinc sulfate, 8 parts of sodium octaborate, 2 parts of ammonium molybdate, 0.4 parts of Sodium α-naphthalene acetate, 10 parts of alginic acid, 15 parts of vitamin C, 15 parts of polyacrylamide, 100 parts of humic acid, and 7 parts of plant anti-stubble agent powder are put into the mixer, fully stirred, and then used as fertilizer The granulator performs granulation.

[0024] Embodiment 3: Step 3), the packaging is the same as Example 1, the difference is:

[0025] 1) Put 300 parts by weight of urea and 300 parts of potassium sulfate that have been sieved through 100 meshes into the mixer and stir thoroughly. After mixing, use a fertilizer granulator to granulate, and the granulated urea and potassium sulfate mixture coated with 8 parts of polyurethane resin;

[0026] 2) After 100 mesh sieving, the parts by weight are 200 parts of diammonium hydrogen phosphate, 10 parts of magnesium sulfate, 15 parts of zinc sulfate, 5 parts of sodium octaborate, 1 part of ammonium molybdate, 0.3 parts of Sodium α-naphthalene acetate, 8 parts of alginic acid, 10 parts of vitamin C, 10 parts of polyacrylamide, 80 parts of humic acid, and 5 parts of plant anti-stubble agent powder are put into the mixer, fully stirred, and then used as fertilizer The granulator performs granulation.