First, optimize the breeding environment
1, choose a good breeding Tangkou
The breeding pond mouth must be far away from sources of pollution such as villages and factories, and the source water quality is fresh and the water flow is unimpeded.
2. Scientific planning and transformation of Tangkou
The pool depth is about 1.5 meters and the slope ratio is 1:2-1:3.
3, completely clear pond
Clear excess silt in the pond to ensure that the depth of silt in the bottom of the tank is 10-20 cm. After dredging, fully expose the bottom of the pool and allow the organic matter in the pool to be completely decomposed. Disinfected with quicklime, generally 250-300kg of lime with lime, Quanchiposa. After 48 hours, the cultivator turns the bottom of the pool. The dredging in Laotangkou is particularly important, and the amount of quicklime can be appropriately increased. After thorough dredging and disinfection, new water is added.
4, a reasonable density planted grass
The main planting submerged grass can be part of the planting emerged plants. The planting area of ​​water and grass accounts for 50%-60% of the area of ​​the Tangkou, and the spacing of the planting plants is 30-60 cm.
Second, reasonable stocking
1, crab seedlings
Choose high-quality, suitable for local growth of crabs, after thorough disinfection and stocking.
2, density
Reasonable stocking density, based on the principle of thinning, 200 kg/kg crabs, 400-500 stocks per acre.
3, time
Appropriate restocking time is generally appropriate in March. If you stock up too late, crab growth will be affected.
4, set up
Put other special aquatic products, put 4-5 shrimp (5-6 kg/mu), or 3 kg (10 kg) of body larvae, in April-May, and set 15-20 fish larvae in May-June. /mu.
Third, scientific feeding
In April-May, animal feeds such as small fish, shrimp, and fish meal are mainly fed, but plant foods can not be lacking, nutrition should be balanced, and the content of lipids in the food should be as small as possible to prevent damaging the liver of crabs. In addition, 400-500 kilograms of snails are placed per acre, which not only purifies the water but also serves as an alternative bait.
From June to September, it is mainly formulated feed, not too refined, to ensure that the bait protein quality of 28% -30%, to ensure that the squid bait fish pellet feed. In October, the concentrate is the main ingredient, and the protein content in the feed is guaranteed to be over 36%.
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