2. Generally, newly-built lobster ponds can be cleaned with quicklime water, per mu 100 kg. If lobsters are cultured in old ponds or lakes, they should be dredged, trimmed and exposed to the sun 65,438+00-65,438+05 days before the release of shrimp seedlings, and disinfected with 50 kg of quicklime in dry ponds. At the same time, the predatory wild enemies such as catfish, loach, snakehead, snake and rat in the pond will be completely eliminated.
3. Generally, 10- 15 days before the release of shrimp seedlings, fully decomposed feces such as 100-200 kg of pig manure are applied to each mu of water surface to cultivate plankton and provide a proper amount of organic debris as shrimp feed.
A water curtain, preferably 60-80 mesh, should be installed before the pond enters the water to prevent the enemy from entering the water. The depth of the pool water is maintained at 50-80 cm, and the transparency is between 30-40 cm.
4. In the sunny morning and evening, it is advisable to raise 6000-8000 young shrimps with a length of 2 cm or 4000-6000 young shrimps with a length of 3-5 cm per mu. The specifications of shrimps stocked in the same pond are neat and consistent. At the same time, about 50 grams of flowers, 300-400 silver carp and 200 bream can be kept in the pond water.
5. Feed minced fish and minced meat within 3 days after seedling release, and feed small miscellaneous fish, minced meat or compound feed within 65 and 438+0 months after 3 days. When the shrimp seedlings grow to 6-7 cm, they can all be fed with crushed snails and mussels and appropriate plant feed such as wheat, bran, corn and cake or compound feed. The daily feeding amount is based on satiety, eating and leaving no residual bait. Generally, crayfish and adults are fed at 15%-20% of their body weight, which can be adjusted according to their eating conditions. Feed twice a day, once in the morning and once in the evening, and the feeding amount at night accounts for 70%-80% of the daily feeding amount. Bait should be thrown around the pond, and properly dispersed, mostly in places where lobsters are concentrated to facilitate their feeding.
6. Lobsters grow fast, have vigorous metabolism and high oxygen consumption. Therefore, the water quality of shrimp ponds should be kept fresh, and water should be added to the depth of 15-20cm every week to ensure that the water quality is fresh, clean and cool, and there is enough dissolved oxygen. The transparency of the pool water should be controlled above 35cm. When the weather is overheated, the pond water should be properly deepened to stabilize the water temperature. Strictly prevent water quality from industrial pollution, pesticide pollution and chemical pollution.
7. When the dissolved oxygen in the water is low, the water quality is aging, or bad weather such as thunderstorm, sultry and even cloudy days, the feeding amount should be reduced or stopped, and attention should be paid to observation. If the lobster is found to be unresponsive, it will swim to the shore and climb to the shore with its head floating, indicating that the lack of oxygen is serious, and it is necessary to inject water in time or turn on the aerator to increase oxygen.