Around the coming rainy season, high temperature and humidity, continuous rain, sultry and low-pressure weather will directly affect the safety of aquaculture animals crossing the river, while the resulting animals will suffer from lack of oxygen, floating heads, which will affect the yield, and the disease will occur. Aquaculture Animals A large number of deaths were even annihilated. Therefore, certain countermeasures during the rainy season are particularly important.
First, pay attention to feed. When the water temperature rises in early summer, the lobster enters the optimal growth time, but due to the large amount of feed and excretion, weather changes can easily deteriorate the water quality. Therefore, it is necessary to increase or decrease the feeding amount of the feed according to the weather changes. When the weather is clear, it may be appropriate to cast more. Continuous rain may cause less or no investment.
Second, add new water properly. Generally, the new water should be filled 5-7 days, about 20% of water is added each time, and 20% of the water can be changed conditionally. Note that you must not fill up the pool water to prevent the flood pool from being lost during heavy rain.
Third, control the water quality of fat. Appropriate use of inorganic fertilizer, keep the water in the appropriate density of phytoplankton, so that the transparency of the pool to maintain between 20-40 cm, shrimp and crab breeding pond mouth maintained at 35-40 cm, must not be a large number of organic fertilizer applied to the Tangkou Oxygen consumption is even more severe on rainy days.
Fourth, turn on oxygen at the right time. Equipped with aerobic machinery for breeding ponds, the lack of light in Meiyu weather, it is necessary to turn on oxygen at a timely manner to prevent aquaculture animal hypoxia, but also conducive to improve the pond water quality. The principle of starting up is: open at noon on sunny days, open early in the morning on cloudy days, and open all day long and rainy.
Fifth, careful prevention of disease. In Meiyu weather, do not use Quanchiposa drugs to prevent stress on crayfish and cause diseases. In the amount of food can be added to VC such as internal medicine to enhance immunity and improve anti-stress ability.
6. Pay attention to the water grass management in the lobster pond. Aquatic grass is not only a vegetative bait for lobsters, but also a habitat for lobsters to inhabit, shell and hide. It can also shade and cool down. In the rainy season, aquatic plants are easy to go up and perishable. In order to keep the floating grass rooted in a timely manner, the area covered by aquatic weeds should be kept between 50% and 60%, and extra water should be removed from the pond in the pond. Water grasses should be sparsely covered, open grass ditch, and pass through, which will facilitate the flow of water and increase the dissolved oxygen in the water. The aquatic weeds are less in the mouth of Tongliao. In order to effectively conserve the aquatic weeds, the proportion of plant-based foods should be properly increased and small snails should be added to ensure a good ecological environment in the shrimp ponds. At the same time, we must promptly remove floating and dead aquatic plants to keep shrimp ponds clean and sanitary, prevent water grass from corrupting and worsen water quality.
VII. Adhere to the morning and evening tours. Every morning in the evening and once in the evening, the patrol ponds were inspected for PH values ​​and observed for changes in water quality, water color, and activity of the animals raised. At the same time, check if the Tangkou embankment, water inlet and outlet, and aeration facility are in good condition. If any problems are found, promptly resolve the problem.
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