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Timely change of water, aeration, changing water, keep the water fresh, change the water every time 15 to 20 centimeters, can not big and big. When inconveniently changing the water, 5 kg of calcined pulp may be used per acre and the whole pool may be spilled. It may be applied every 20 days or so. At the same time, we must rationally use aerators, stick to sunny days from 12:00 to 3:00 for 3 hours, 3 to 5 in the morning for 2 hours; cloudy and rainy days to increase boot time, in the morning, 5 to 8 points for 3 hours, and 3 hours in the afternoon. ~ 6 hours boot 3 hours, midnight 12 hours to 3 hours boot 3 hours.
Disinfect the water body regularly and use microbial preparations According to the water quality of the pond, alternately disinfect the medicine with quicklime and dibromohydantoin every 20-30 days. After 3 to 5 days of disinfection, microbiological preparations are used to improve water quality and prevent diseases.
Properly rearing and polyculture In August-September, when the density of macrobrachium rosenbergii is too high, it is necessary to catch fish in batches, catch and raise fish in order, and maintain a reasonable breeding density in the pond. Every time a net is caught and shrimp is caught, it is necessary to fill the water in time, open the aerator, and use the drugs such as dibromohydantoin to disinfect the water body. Mixed fish are mainly white fleas (75% to 80%), and less squid.
Scientific feeding of fed compound feed should be high-quality and fresh, so that “four settings†(quality, quantity, orientation, timing) and “four views†(see shrimp, see the sky, see the water, see the season) can be fed. The water quality is too thick, the weather is stifling or before and after thunderstorms. Feed water and increase oxygen in time. Mixed feed should be fed a small number of times, usually at about 8 o'clock in the morning on sunny days (20% of the total feeding amount), and once at 5 o'clock in the afternoon (accounting for 50% of the total amount of feeding). It is fed once around 9 o'clock (30% of the total feeding amount).
To maintain environmental sanitation, we must diligently remove weeds and clean the food field, and find that dead fish and dead shrimp are removed in time for harmless treatment.
Anti-natural disasters and predators, such as thunderstorms and typhoons, will affect aquaculture in varying degrees. Farmers need to listen to weather forecasts every day and take preventive measures in advance. In addition, it is necessary to visit the ponds on a regular basis to prevent birds such as egrets from invading the soft-shelled shrimps on the side of the pond during the day, and to prevent shrimps and water rats from eating shrimp at night, and if they are found, kill them in time.
Macrobrachium prawn breeding management key
At present, it is at a high temperature and varied weather, the water quality and sediment quality of the Macrobrachium breeding ponds are easily deteriorated, resulting in the lack of oxygen flooding ponds and diseases, and aquaculture management should be especially careful. The recent management of Macrobrachium praecox focuses on the following six key points.