Fermentation method to dry the collected fresh pig manure, after crushing, add 10% wheat bran or corn flour, add water, mix and stir, add water in the hands of the pig manure in the fingers without water drops, and then into the concrete pool Or in the earth pool, the layers are pressed tightly. After filling, the upper mouth is sealed with a plastic cloth and can be fermented for 3 to 5 days at a temperature of 20-30°C. Fermented pig manure can be fed directly to the fish, or it can be fed with 28% bran and 12% peanut cake to make a group of fish. Every day at 8 o'clock in the morning, at 12 o'clock in the afternoon and at 5 o'clock in the afternoon, each spot is fed once. Daily dosage is 4%-6% of the total body fish weight.

The dried pig manure is dried or air-dried by a drying method. After crushing, it is processed by mixing 54% of pig manure, 10% of bean cake, 30% of bran, 4% of fishmeal, 2% of salt and additives. Granulated or chopped.

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