Preparation method of special controlled-release fertilizer for Chinese water chestnuts
A technology of controlled-release fertilizer and horseshoe, applied in application, nitrogen fertilizer, potash fertilizer, etc., can solve problems such as high complexity
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Embodiment 1
[0036] 1) Preparation of fat core
[0037] Add 140 parts of urea, 120 parts of potassium chloride, 90 parts of calcium phosphate, 3 parts of borax, 3 parts of zinc sulfate, and 2 parts of manganese sulfate. After crushing through a 150-mesh sieve, add 5 parts of 3,4-dimethylpyrazole phosphate 6 parts, 6 parts of polyvinylamide, stir evenly, granulate according to conventional method in granulator, obtain fertilizer core.
[0038] 2) Preparation of coating agent
[0039] Weigh 4 parts of polylactic acid, 3 parts of polyethylene glycol, and 2 parts of ethanol, and make an inner coating agent according to the coating process; weigh 6 parts of polyacrylate, 1 part of EPDM rubber, and 3 parts of modified starch. 2 parts, 2 parts of acetone, and 2 parts of water, according to the coating process, the outer coating agent is made. Among them, the coating process and the inner coating process are as follows: after adding the required raw materials into the reactor, heat up to 80°C, s...
Embodiment 2
[0044]1) Preparation of fat core
[0045] Add 200 parts of urea, 170 parts of potassium chloride, 140 parts of calcium phosphate, 6 parts of borax, 5 parts of zinc sulfate, and 4 parts of manganese sulfate. After crushing through a 200-mesh sieve, add 3,4-dimethylpyrazole phosphate 9 10 parts, 10 parts of polyvinylamide, stir evenly, and granulate in a granulator according to a conventional method to obtain a fertilizer core.
[0046] 2) Preparation of coating agent
[0047] Weigh 10 parts of polylactic acid, 9 parts of polyethylene glycol, and 4 parts of ethanol, and make an inner coating agent according to the coating process; weigh 15 parts of polyacrylate, 4 parts of EPDM rubber, and 5 parts of modified starch. 4 parts, 4 parts of acetone, and 4 parts of water are made into an outer coating agent according to the coating process. Among them, the coating process and the inner coating process are as follows: after adding the required raw materials into the reactor, heat up...
Embodiment 3
[0052] 1) Preparation of fat core
[0053] Add 180 parts of urea, 150 parts of potassium chloride, 120 parts of calcium phosphate, 5 parts of borax, 5 parts of zinc sulfate, and 3 parts of manganese sulfate. After crushing through a 200-mesh sieve, add 3,4-dimethylpyrazole phosphate 6 8 parts, 8 parts of polyvinylamide, stir evenly, granulate according to conventional method in granulator, obtain fertilizer core.
[0054] 2) Preparation of coating agent
[0055] Weigh 7 parts of polylactic acid, 7 parts of polyethylene glycol, and 3 parts of ethanol according to the coating process to obtain an inner coating agent; weigh 13 parts of polyacrylate, 2 parts of EPDM rubber, and 4 parts of modified starch , 3 parts of acetone, and 4 parts of water are made into an outer coating agent according to the coating process. Among them, the coating process and the inner coating process are as follows: after adding the required raw materials into the reactor, the temperature is raised to ...
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