Freshwater lobster pond breeding management

Freshwater lobster has the advantages of fast growth, large individual, wide appetite, strong adaptability, and delicious meat, high economic value, and has a broad market prospect. The cultivation of freshwater lobster is a good project that has low investment, high efficiency, and simple operation.
I. Pond conditions Freshwater lobsters have lax conditions on ponds, and they should choose pools with good ventilation, water conservation, and no water pollution. The pond size is generally 5 to 10 mu, the water depth is 1.5m or more, and the mud bottom is at the bottom. Flat, Chiba slope ratio 1:3 ~ 4, with convenient inlet and drainage conditions and anti-theft protection measures. As a lobster's hidden habitat, some buffalo plants can be planted in the pond or a certain number of shelters such as stones, bricks and tiles can be placed, occupying about 1/3 of the total surface area.
Second, before the stocking of shrimps, the clear ponds shall be disinfected with quicklime of 100-150kg/mu to kill harmful fish and harmful aquatic insects in the pond and avoid enemy invasion. Disinfection 3 days after the water, 10 days later with 300 ~ 500kg / acre fermented organic fertilizer fertilizer water, plentiful rich plankton, to provide sufficient food for the shrimp.
Stocking shrimps are generally selected from 3 to 5cm in length, robust and disease-free shrimps, and the stocking density can be controlled at 2000 to 3000 tails/mu. Small shrimps can be appropriately increased in stocking density. Large, so the specifications of the stocks stocked in the same pond should be neat. When the seedlings are released, avoid excessive water temperature, and it is advisable to go to the pool in the evening or at dawn. Before releasing the seedlings, slowly add a small amount of water to the container for transporting the seedlings until the water temperature of the container approaches the temperature of the pool water, and then pour the shrimp into the pool water.
Third, feeding and management
1. Feed the bait. Freshwater lobster is omnivorous. It not only eats animal foods such as fresh fish, snails, razor clams and livestock and poultry. It also likes to eat soy beans, bean cakes, bran, corn and fresh aquatic plants and other plant foods. It can also feed shrimp. With compound feeds, the freshwater lobster's bait problems are easily resolved. According to the general experience, the amount of the whole day's feeding should be controlled by eating, eating, and leaving no residual baits. The general shrimp is 20 to 25% of the body weight, the middle shrimp is 15 to 20% of the body weight, and the prawns are weighed. 10 to 15% of the bait is fed twice daily, sooner or later. Because the freshwater lobster feeds mainly at night, it feeds 70-80% of the whole day's feed at night, and the bait should be put in the shallow water near the pool. Feeding should be done regularly, fixed-point, quantitatively and qualitatively. Each pond can be set up with 2 to 4 bait observation stations. Every morning, observe whether the bait has been eaten to determine the amount of feed at the time; feeding too little will inhibit lobster The growth or hunger kills each other. Too much both increase the cost and cause the deterioration of the pond environment, which is unfavorable to the growth and shelling of lobsters. The bait can use general prawn food or lobster special food.
2. Water quality management. Pool water requires fresh water, transparency of 30 ~ 40cm, PH value of 7 ~ 9, dissolved oxygen is greater than 4g / L. During the breeding process, attention should be paid to the water quality and the bottom environment so as not to deteriorate. When the dissolved oxygen content in the water is very low, the water quality deteriorates, or when thunderstorms, hot weather, or even cloudy weather occur, reduce feeding or stop feeding. When the weather is too cold or too hot, the pool water may be properly deepened to prevent the extreme temperature from occurring, so as to stabilize the bottom water temperature. In the hot season of June to August, every 5 to 7 days during the hot season, change the water every time. The amount of water exchanged is 20 to 30% of the pool water every time. You can regularly add new water when changing the water inconvenience.
3. Disease prevention and control. Freshwater lobsters are more resistant to disease than aquatic products such as river crabs and shrimps, but their disease control cannot be taken lightly under artificial breeding conditions. The shrimp or juvenile shrimp must be sterilized in front of the pond to prevent pathogens from entering the pool. The water body is sterilized on a regular basis during normal feeding, mainly using quicklime, with lime water of 10 to 15kg/mu per day in the whole pool for 15 days, which not only serves the purpose of preventing disease, but also facilitates the shelling of freshwater lobsters. . During the hot season in summer, every 15 days, drugs such as multivitamins and calcium tablets are added to the diet to enhance the freshwater lobster's immunity. Pay attention to patrol the pool every day to achieve early detection, early prevention, and early treatment.
Fourth, harvesting freshwater lobster grows fast, when the stocking can be harvested and marketed that year, can be harvested by net catch or dry catch. Net catch: Since the lobster is mainly grazing at night, the net can be placed in the shallow water in the pool before the evening, and the tail of the net leaks out of the water. The shrimp is collected from the net the next morning. Dry catch: After repeated arrests, drain the pool water and copy it with a copying net. If the aquaculture production is large, and a large number of products are listed in batches in stages, fishing nets such as trawls or nets may also be used. The harvest is better when the night is dark.

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