High-temperature season aquaculture management measures

The high temperature will continue in the near future, which will bring greater difficulties to aquaculture management. If you do not do a good job in production technology management, it will cause unnecessary losses. Therefore, the management of aquaculture technology in the high temperature season is particularly important. We will now discuss three points of management measures regarding the current high temperature situation.

Doing a good job of feeding management in pond culture

At present, the water temperature of the pond about 50 centimeters in the high temperature season has reached above 30 degrees Celsius, which has a great influence on the aquaculture of fish, shrimps, crabs and other aquatic products. In the case of long-term high water temperature, the immunity of the fish, crabs and shrimps has declined, so the investment Feeding should control the daily amount of fish, shrimp and crab, generally controlled at about 70%, and the feeding time of fish should be controlled at 3pm. The shrimp and crab should be fed after 6 o'clock. The feed should be controlled at the water level. About 50 cm, the feed should be fresh and not easily deformed. The time of eating and drinking of fish, crabs, and crabs is controlled in about 3 hours. Shrimps and crabs should be as small as possible to feed bait fish. Even if they are to be fed, they must be sterilized before they can be fed, so as to avoid fish, shrimp and crab diseases caused by deterioration and deterioration.

Do a good job of pond grass and water quality management

At present, the specifications for fish, shrimp, and crab farming are generally relatively large, and the fed amount has reached a relatively high level. Pond water quality and aquatic plants may change greatly in a relatively short period of time, and the toxin produced in the pond water will gradually increase. The dissolved oxygen at the bottom is lower with increasing oxygen demand factors. In general, the dissolved oxygen level of the pond can reach about 3 mg/l in the early morning. It is a fairly good pond. The dissolved oxygen level in most ponds is only around 2 mg/l. , shrimp and crab ponds, the use of microporous oxygen, should be activated at night from 9 to 10 o'clock, until the sunrise, while the spatter in the pond biological agents such as EM bacteria, Bacillus, etc., timely splash of fish, shrimp, crab antidote , To reduce the toxins in the water body, the shrimp and crab ponds should be splashed with herbicides and antidote so that the fishes, shrimps and crabs can survive the high temperature season. At the same time, water can be added periodically during the hot season.

Do a good job in disease prevention and control

1. Adjust water quality. After the rain, the water quality changes greatly. The pH values ​​in the pond, ammonia nitrogen, nitrite, hydrogen sulfide, and other indicators are not stable. The detoxification of Bishuian is used to adjust the water quality, and the water quality indicators such as ammonia nitrogen, nitrite, and hydrogen sulfide in the pond are reduced, and the pH is low. The pond uses quicklime to sprinkling, splashing 15kg of quicklime at a depth of 1m per acre to adjust the pH of the water, which facilitates the growth of pond plankton and increases the amount of dissolved oxygen in the pond.

2. Insecticide disinfection. Hold the fine weather to disinfect the insecticidal ponds. When using pesticides for insecticidal disinfection, calculate the volume of the water bodies. Do not increase the doses. Do not use the drugs more than 2 meters deep for 2 days to 3 days. Use a dose of water that is more than 2 meters deep, otherwise it will cause poisoning in the fish. In the use of disinfectants can not be mixed with several disinfectants, otherwise it will cause damage to the water body, affecting the ability of the water body's own repair.

3. Correct oxygenation. In addition to normal oxygenation during the middle of the night and at noon during the cultivation process, the system should be turned on after the medication, turned on before feeding, turned on after fertilization, and opened on a rainy day. Correct oxygenation is to regulate the dissolved oxygen in the pond and also to ensure the decomposition and degradation of ammonia, nitrite, hydrogen sulfide, methane and other water quality indicators in the pond.

4. Control feeding. Feeding should be strictly controlled during feeding in the high temperature season, one hour ahead of the feeding time, especially the last feeding time in the afternoon, allowing the fish to fast overnight at night.

5. Substrate improvement. The use of bottom reforming agent in the pond where there is excessive silt is used to control the change of the pond sediment quality, especially the improvement of the substrate around the food table.

6. The bait is fed. In the high temperature season, due to the large amount of fish intake, in order to reduce the pollution of the pond, the use of drugs in the process of insecticidal disinfection will cause damage to the water body. The parasites will be controlled by means of drug feeding, and the traditional Chinese medicine will increase fish consumption. Low resistance to disease.

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