Breeding technology of Scylla serrata in cages with Penaeus monodon

The shrimp pond is surrounded by 50cm high asphalt paper as an anti-escape measure. The original drainage system is transformed into a separate drainage and irrigation system, and the silt at the bottom of the pond is removed.3Month25 Use about 150kg of quicklime per acre to clean the pond, and expose it 3d and then add water 20cm to wash the pond, and then drain it,
The crab stocking time is about 1 month. Crab seeds are purchased locally, the size is 20~30 only /kg, and each mu is stocked 15kg. After the shrimps and crab seedlings are put into the pond, they are fed according to the conventional shrimp feeding methods. The feeding is mainly based on shrimp compound feed. Generally, they are fed twice every d, in the morning 6:00～In the early stage of breeding, add new water 1 every 5～7d. The amount of water added each time is about 10cm, and it has been deepened to 1) Sprinkle hydrated lime frequently, and control the dosage at 15×10×E-6~20×10×E-6 every month, usually 4Results and Discussion
Through the polyculture of shrimp and crab, the disease of shrimp has been basically controlled. After 3 months of cultivation and drainage harvesting, the output of shrimp is 540kg, and the price is 28 yuan5500 yuan, including 33 packages of shrimp feed, plus the cost of some miscellaneous fish and potatoes. The seed fee is 960 yuan, and the crab seed is 1200 yuan. The total is